CN101542032B - Non-woven fabric - Google Patents

Non-woven fabric Download PDF

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Publication number
CN101542032B
CN101542032B CN2007800172364A CN200780017236A CN101542032B CN 101542032 B CN101542032 B CN 101542032B CN 2007800172364 A CN2007800172364 A CN 2007800172364A CN 200780017236 A CN200780017236 A CN 200780017236A CN 101542032 B CN101542032 B CN 101542032B
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China
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mentioned
fiber
nonwoven fabric
convex shaped
shaped part
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CN101542032A (en
Inventor
野田祐树
石川秀行
水谷聪
木村明宽
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Unicharm Corp
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Unicharm Corp
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Priority claimed from JP2006244767A external-priority patent/JP5123505B2/en
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Abstract

A nonwoven fabric having a predetermined strength against line tension is provided. A nonwoven fabric includes first regions, second regions, and third regions, in plural, wherein the second regions are arranged on both sides of the first regions, and the third regions are arranged on sides opposite to the first regions side of the second regions. The first regions have the highest content ratio of laterally orientated fibers, and the second regions have the highest content ratio of longitudinally orientated fibers.

Description

Nonwoven fabric
Technical field
The present invention relates to nonwoven fabric.
Background technology
In the past, nonwoven fabric was used to the broad like this field of medical supplies of the cleaning implement, face shield etc. of amenities, wiper etc. at paper diaper, sanitary napkin etc.Like this, though nonwoven fabric is used in various different field,, under reality is used situation in the goods in each field, need manufacture character, structure that the purposes with each goods adapts.
Nonwoven fabric for example forms fibrages (fiber web) by dry process, damp process etc., by chemical bonding, hot rolling method etc., fiber in the fibrage is bonded to each other makes.Also have in being used in the operation that forms fibrolaminar fiber combination, sting this fibrolaminar method repeatedly, comprise the method for jet water course etc., fibrage is applied the method for operation of the power of physics from the outside with a plurality of pins.
But these methods only are to make fiber interlacing each other eventually, not the method that also has fibrolaminar shape etc. to adjust to the orientation of fibrolaminar fiber, configuration.That is what, produce with these methods is the nonwoven fabric of simple sheet.
In addition, for example for the use at absorbent commodity such as the nonwoven fabric of the surface patch that is used for absorbent commodity etc., absorbent commodity absorbs under the situation of liquid of excreta etc., in order to keep or to improve sense of touch to skin, wishes to use to have concavo-convex nonwoven fabric etc.So, in No. 3587831 communiques of patent, disclose and to have carried out thermal welding etc. by a plurality of fibrage laminations of the different fiber making of heat-shrinkable, by the thermal contraction of the one deck at least in a plurality of fibrages, concavo-convex nonwoven fabric and manufacture method thereof have been formed on the surface.
But, disclosed nonwoven fabric in No. 3587831 communiques of patent, under the situation that this nonwoven fabric is used for for example resemble other goods the surface patch of absorbent commodity, have in manufacture process, owing to apply line tension, this nonwoven fabric is stretched, and is formed on concavo-convex by conquassation on the nonwoven fabric, perhaps the low such problems such as situation of the aspect ratio of protuberance height originally.
Here, disclosed nonwoven fabric in No. 3587831 communiques of patent, be the second fibrage lamination that will contain the heat-shrinkable fiber to by the fiber that the contains the non-thermal contraction fiber formed first fibrolaminar single face side, by a plurality of thermal welding portion that produces because of heat embossing by incorporate nonwoven fabric.In detail, this nonwoven fabric is by behind heat embossing, makes the thermal contraction in the horizontal direction of second fibrage, forms a plurality of protrusions that are made of first fibrage in the zone that does not have thermal welding, makes thermal welding portion become recess and the nonwoven fabric that constitutes.
Though this nonwoven fabric is by the second fibrolaminar thermal contraction, forms a plurality of protrusions at first fibrage,, find that the second fibrolaminar thermal contraction shrinks in the horizontal direction.Promptly, in the manufacturing process of the goods that used this nonwoven fabric etc., if this nonwoven fabric is applied line tension, then having second fibrage extends easily, the first fibrolaminar protrusion is also followed it and is stretched, perhaps the low such problems such as situation of the aspect ratio of protrusion height originally.
The present invention uses for reference above-mentioned such problem and the invention that produces, and its purpose is even provide a kind of in order to have applied line tension, also to have the intensity of regulation, and has adjusted the nonwoven fabric of fiber alignment at least.
Summary of the invention
Present inventors find by from upper face side, to the fiber web gas jet that supports from following side by the aeration support component of stipulating, this fibroreticulate fiber of formation is moved, can form at least at fiber alignment, the different a plurality of zones of amount of vertical directional fiber are until having finished the present invention.
(1) a kind of nonwoven fabric, be have first direction and with the nonwoven fabric of the second direction of above-mentioned first direction quadrature, it is characterized in that having:
A plurality of first areas,
A plurality of second areas that each both sides form along above-mentioned a plurality of first areas,
And a plurality of the 3rd zones, described a plurality of the 3rd zones above-mentioned a plurality of second areas each with each relative side of above-mentioned a plurality of first areas, be formed on adjacent above-mentioned a plurality of second areas between each,
Each is compared with above-mentioned a plurality of the 3rd zones, each containing ratio height of above-mentioned a plurality of first areas at the fiber of above-mentioned second direction orientation,
Each compares each containing ratio height at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of second areas with above-mentioned a plurality of the 3rd zones.
(2) in (1) described nonwoven fabric, each the containing ratio at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of the 3rd zones is 40% to 80%,
Above-mentioned a plurality of first area each at the containing ratio of the fiber of above-mentioned first direction orientation below 45%, and lower more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation,
Above-mentioned a plurality of second area each at the containing ratio of the fiber of above-mentioned first direction orientation more than 55%, and higher more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation.
(3) in (1) or (2) described nonwoven fabric, above-mentioned a plurality of first areas each at the containing ratio of the fiber of above-mentioned second direction orientation more than 55%.
(4) in each described nonwoven fabric of (1) to (3), each fiber weight per unit area of above-mentioned a plurality of first areas is 3 to 150g/m 2,
Each fiber weight per unit area of above-mentioned a plurality of second area is 20 to 280g/m 2,
Above-mentioned a plurality of the 3rd each fiber weight per unit area of zone is 15 to 250g/m 2
(5) in each described nonwoven fabric of (1) to (4), each fibre density of above-mentioned a plurality of first areas is at 0.18g/cm 3Below,
Each fibre density of above-mentioned a plurality of second area is at 0.40g/cm 3Below,
Above-mentioned a plurality of the 3rd each fibre density of zone is at 0.20g/cm 3Below.
(6) in each described nonwoven fabric of (1) to (5), roughly even at each height of above-mentioned a plurality of first areas, above-mentioned a plurality of second areas and above-mentioned a plurality of the 3rd zone at the thickness direction of this nonwoven fabric.
(7) in each described nonwoven fabric of (1) to (5), be formed with a plurality of slot parts at this nonwoven fabric,
With a plurality of convex shaped parts to form with each adjacent mode of above-mentioned a plurality of slot parts,
Above-mentioned a plurality of first area each constitute above-mentioned a plurality of slot part each,
Each is formed in the sidepiece of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of second area,
Each is formed in the central portion of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of the 3rd zone.
(8) in (7) described nonwoven fabric, at the height of the thickness direction of this nonwoven fabric of above-mentioned slot part below 90% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part,
At the above-mentioned height of the above-mentioned sidepiece of above-mentioned convex shaped part below 95% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part.
(9) in (7) or (8) described nonwoven fabric, above-mentioned a plurality of slot parts each the fiber weight per unit area with respect at each average fiber weight per unit area of above-mentioned a plurality of convex shaped parts below 90%.
(10) in each described nonwoven fabric of (7) to (9), each are adjacent different mutually at each above-mentioned height of above-mentioned a plurality of convex shaped parts across above-mentioned a plurality of slot parts.
(11) in each described nonwoven fabric of (7) to (10), be flat at each top of above-mentioned a plurality of convex shaped parts.
(12) in each described nonwoven fabric of (7) to (11), on the face of the opposite sides of face that form with above-mentioned a plurality of slot parts and above-mentioned a plurality of convex shaped part of this nonwoven fabric, form to the outstanding a plurality of zones of the projected direction opposition side of above-mentioned convex shaped part.
(13) in each described nonwoven fabric of (1) to (6), form a plurality of peristomes on each in above-mentioned a plurality of first areas.
(14) in (13) described nonwoven fabric, at each the fiber of periphery of above-mentioned a plurality of peristomes with along each the mode orientation of periphery of above-mentioned a plurality of peristomes.
(15) in each described nonwoven fabric of (1) to (14), this nonwoven fabric mixes the fiber of WATER REPELLENCY.
(16) in each described nonwoven fabric of (1) to (15), has flexuosity at above-mentioned first direction.
The invention effect
The present invention uses for reference above-mentioned problem and the invention that produces, even can provide a kind of in order to have applied line tension, also has the intensity of regulation, and has adjusted the nonwoven fabric of fiber alignment at least.
Description of drawings
Fig. 1 is fibroreticulate stereogram.
Fig. 2 A is the vertical view of the nonwoven fabric of first embodiment.
Fig. 2 B is the upward view of the nonwoven fabric of first embodiment.
Fig. 3 is the amplification stereogram of the regional X of Fig. 2.
Fig. 4 A is the vertical view of mesh-supported parts.
Fig. 4 B is the stereogram of mesh-supported parts.
Fig. 5 is below the fiber web of presentation graphs 1 under the state of side by the mesh-supported member supporting of Fig. 4, side gas jet upward, the figure of the state of the nonwoven fabric of first embodiment of shop drawings 2.
Fig. 6 is the side view of the non-woven cloth manufacturing device of explanation first embodiment.
Fig. 7 is the vertical view of the non-woven cloth manufacturing device of key diagram 6.
Fig. 8 is the amplification stereogram of the regional Z of Fig. 6.
Fig. 9 is the upward view of the ejection portion of Fig. 8.
Figure 10 is the amplification stereogram of the nonwoven fabric of second embodiment.
Figure 11 is the amplification stereogram of the nonwoven fabric of the 3rd embodiment.
Figure 12 is the stereogram of the mesh-supported parts of the 3rd embodiment.
Figure 13 is the amplification stereogram of the nonwoven fabric of the 4th embodiment.
Figure 14 is the amplification stereogram of the nonwoven fabric of the 5th embodiment.
Figure 15 is the amplification stereogram of the nonwoven fabric of the 6th embodiment.
Figure 16 A is the vertical view of the support component of the 6th embodiment.
Figure 16 B is the stereogram of the support component of the 6th embodiment.
The specific embodiment
Below, with reference to accompanying drawing, illustrate to be used to implement best mode of the present invention.
Fig. 1 is fibroreticulate stereogram.Fig. 2 is the vertical view and the upward view of the nonwoven fabric of first embodiment.Fig. 3 is the amplification stereogram of the regional X of Fig. 2.Fig. 4 is the vertical view and the stereogram of mesh-supported parts.Fig. 5 is below the fiber web of presentation graphs 1 under the state of side by the mesh-supported member supporting of Fig. 4, side gas jet upward, the figure of the state of the nonwoven fabric of first embodiment of shop drawings 2.Fig. 6 is the side view of the non-woven cloth manufacturing device of explanation first embodiment.Fig. 7 is the vertical view of the non-woven cloth manufacturing device of key diagram 6.Fig. 8 is the amplification stereogram of the regional Z of Fig. 6.Fig. 9 is the upward view of the ejection portion of Fig. 7.
Figure 10 is the three-dimensional cutaway view of the nonwoven fabric of second embodiment.Figure 11 is the three-dimensional cutaway view of the nonwoven fabric of the 3rd embodiment.Figure 12 is the amplification stereogram of the mesh-supported parts of the 3rd embodiment.Figure 13 is the three-dimensional cutaway view of the nonwoven fabric of the 4th embodiment.Figure 14 is the three-dimensional cutaway view of the nonwoven fabric of the 5th embodiment.Figure 15 is the three-dimensional cutaway view of the nonwoven fabric of the 6th embodiment.Figure 16 is the vertical view and the stereogram of the support component of the 6th embodiment.
1.1
The nonwoven fabric of present embodiment be adjusted to have a plurality of first areas, each both sides form along a plurality of first areas a plurality of second areas and a plurality of second areas each with form each the opposition side of a side of a plurality of first areas, be formed on the nonwoven fabric in a plurality of the 3rd zones between the adjacent second area.Then, be that to be formed fiber be that the first area is higher than the 3rd zone at the containing ratio as the directed horizontal directional fiber of the width (WD) of second direction, fiber is that second area is than the 3rd regional high nonwoven fabric at the containing ratio as the directed vertical directional fiber of the length direction (LD) of first direction.
1.2 first embodiment
To Fig. 5, first embodiment of nonwoven fabric of the present invention is described according to Fig. 2.
1.2.1 shape
As Fig. 2 A, Fig. 2 B and shown in Figure 3, the nonwoven fabric 110 of present embodiment be the one side side of this nonwoven fabric 110 along its length (LD) roughly uniformly-spaced be formed with nonwoven fabric side by side as a plurality of slot parts 1 of first area.Then, at a plurality of slot parts of roughly equally spaced forming 1 between each, form each of a plurality of convex shaped parts 2 of constituting by second area and the 3rd zone.This convex shaped part 2 equally roughly equally spaced forms side by side with slot part 1.
Here, in the present embodiment,, be not to be defined to this though slot part 1 is roughly uniformly-spaced to form side by side.For example, slot part 1 also can form according to each different interval, perhaps, is not side by side, but also can so that the mode of slot part 1 interval variation each other form.In addition, even too at convex shaped part.
In addition, though the height of the convex shaped part 2 of the nonwoven fabric 110 of present embodiment (thickness direction (TD)) is roughly even,, for example also can form in the different mode of height of adjacent mutually convex shaped part 2.For example, the height of convex shaped part 2 can be adjusted in the interval of the ejiction opening described later 913 by adjusting the fluid that ejection mainly is made of gas.For example, the interval of constriction ejiction opening 913 can reduce the height of convex shaped part 2, otherwise, by enlarging the interval of ejiction opening 913, can improve the height of convex shaped part 2.Have again,, can also alternatively form highly different convex shaped part 2 by form the interval of ejiction opening 913 with narrow interval and big interval alternant way.In addition,, the height of convex shaped part 2 is partly changed, then, also produced the advantage that can reduce the burden of skin owing to the contact area with skin descends if like this.
The convex shaped part 2 of the nonwoven fabric 110 of present embodiment is by constituting as the sidepiece 8 of second area with as the central portion 9 in the 3rd zone.The height of the thickness direction (TD) of the nonwoven fabric 110 of central portion 9 can express 0.3 to 15mm for example, and good is 0.5 to 5mm.In addition, the length of the width of central portion 9 (WD) is 0.5 to 30mm, and good is 1.0 to 10mm.In addition, can express 0.5 to 30mm for example across sidepiece 8 and slot part 1 adjacent central portion 9 distance to each other, good is 3 to 10mm.
In addition, the height of the thickness direction (TD) of the nonwoven fabric 110 of sidepiece 8 can be presented as below 95% of height of central portion 9 for example, and good is 50 to 90%.In addition, the length of the width of sidepiece 8 (WD) is 0.1 to 10mm, and good is 0.3 to 5.0mm.Like this, can be presented as 0.1 to 20mm for example by central portion 9 or slot part 1 adjacent sidepiece 8 distance to each other, good is 0.5 to 10mm.
In addition, the height of the thickness direction (TD) of the nonwoven fabric 110 of slot part 1 is at below 90% of height of the thickness direction (TD) of central portion 9, and good is 1 to 50%, is more preferably 5 to 20% height.The length of the width of slot part 1 (WD) can express 0.1 to 30mm for example, and good is 0.5 to 10mm.Across convex shaped part 2 adjacent slot part 1 distances to each other is 0.5 to 20mm, and good is 3 to 10mm.
By carrying out such design, for example, under the situation of this nonwoven fabric 110 as the surface patch use of absorbent commodity, even can form with when having drained the liquid of a large amount of regulations, this liquid has suppressed to ooze out the slot part 1 that adapts also in surface diffusion into the surface.In addition,, become convex shaped part 2, also keep the space that slot part 1 produces easily by under the situation of the state of conquassation even be applied to nonwoven fabric 110 at the external pressure of surplus.In addition, even impose at external pressure under the state of this nonwoven fabric 110, under the situation that the liquid of regulation is drained, also can suppress to be exuded to widely the surface.Have again,, also, reduce with the contact area of skin owing to form concavo-convexly on the surface of this nonwoven fabric 110 even in case be absorbed into the liquid of the regulation of absorber etc. and depress outside under the situation of returning.Therefore, existence can suppress the situation that liquid is attached to skin widely again.
Here, the assay method of the height of slot part 1 or convex shaped part 2, spacing, width is as follows.For example, nonwoven fabric 110 mounting under the state that does not have pressurization by microscope, is measured from the cross-section photograph or the cross sectional images of nonwoven fabric 110 to workbench.In addition, the boundary of central portion 9, sidepiece 8 and slot part 1 is that the scope with the ratio of the vertical directional fiber of each one and horizontal directional fiber is that benchmark is judged.
When measuring height (length of thickness direction (TD)), with from the upper/lower positions (that is workbench surface) of nonwoven fabric 110 to towards above direction on each extreme higher position of formed central portion 9, sidepiece 8 and slot part 1 for highly measuring.
In addition, the spacing of 9 of mutually adjacent central portions is the distance of measuring between each center of adjacent central portion 9.Equally, the spacing that mutually adjacent sidepiece is 8 is the distance of measuring between the center of adjacent sidepiece 8, and the spacing that adjacent mutually slot part is 1 is the distance of measuring between the center of adjacent slot part 1.
When measuring the width of central portion 9, be to measure from the upper/lower positions (that is workbench surface) of nonwoven fabric 110 to Breadth Maximum towards the bottom surface of top center portion 9.Equally, sidepiece 8 and slot part 1 are also measured.
Here, the cross sectional shape to convex shaped part 2 is not particularly limited.For example, can express dome-shaped, trapezoidal shape, triangular shape, Ω shape, four horn shapes etc. for example.For making the skin sense of touch good, near the end face of good is convex shaped part 2 and side is a curved surface.In addition, even for because external pressure, convex shaped part 2 also can be kept the space that slot part 1 produces by under the such situation of conquassation, and good is from the bottom surface of convex shaped part 2 to end face width constriction.As the good shape of convex shaped part 2, can express the curve (curved surface) of general dome shape etc. for example.
1.2.2 fiber alignment
As shown in Figure 3, this nonwoven fabric 110 be formed with contain fiber 101 along the direction in the zone of the fluid jet that mainly constitutes by gas as the different respectively zone of the containing ratio of the directed vertical directional fiber of length direction (LD).Different respectively zones for example can express slot part 1 as the first area for example, as the sidepiece 8 of second area and as the central portion 9 in the 3rd zone.
Here, fiber 101 is meant fiber 101 with respect to length direction (LD) in length direction (LD) orientation, spends the scope interior orientation of-45 degree+45, in addition, will be called vertical directional fiber at the directed fiber of length direction (LD).So fiber 101 is meant fiber 101 with respect to width (WD) in width (WD) orientation, spend the scope interior orientation of-45 degree+45, in addition, will be called horizontal directional fiber at the directed fiber of width (WD).
Sidepiece 8 is the zones that are equivalent to the both sides of convex shaped part 2, and the fiber 101 of this sidepiece 8 is formed in along fiber directed on the direction of the length direction (LD) of this convex shaped part 2 (vertical directional fiber) many.For example, and the oriented phase ratio of the fiber 101 of the central portion 9 of this convex shaped part 2 (zones between two adjacent both sides 8 of convex shaped part 2), in length direction (LD) orientation.The containing ratio of the vertical directional fiber of sidepiece 8 can express 55 to 100% for example, is more preferably 60% to 100%.The containing ratio of vertical directional fiber than 55% little situation under, have owing to line tension the situation that this sidepiece 8 is stretched.Also exist because sidepiece 8 is stretched the situation that slot part 1, central portion described later 9 are also stretched by line tension.
Central portion 9 is the zones that become between the sidepiece 8 of both sides of convex shaped part 2, is the containing ratio zone lower than sidepiece 8 of vertical directional fiber.This central portion 9 preferably will indulge directional fiber and horizontal directional fiber moderately mixes.
For example, good is, and to form the containing ratio of vertical directional fiber of central portion 9 lower more than 10% than the containing ratio of sidepiece 8, higher more than 10% than the containing ratio of the vertical directional fiber of the bottom of slot part 1.Specifically, good is that the containing ratio of vertical directional fiber is in 40 to 80% scope.
Slot part 1 is because as mentioned above, and () zone for example, hot blast, therefore, the fiber 101 directed at length direction (LD) is directed onto sidepiece 8 to the fluid that mainly is made of gas by direct injection.Then, owing to the bottom that remains in slot part 1 at the directed fiber of width (WD), so the fiber 101 of the bottom of slot part 1 is that horizontal directional fiber is more than vertical directional fiber.
For example, it is lower more than 10% than the containing ratio of the vertical directional fiber of central portion 9 to express the containing ratio of vertical directional fiber of slot part 1 for example.Therefore, in the bottom of slot part 1, in this nonwoven fabric 110, the containing ratio of vertical directional fiber is minimum, otherwise the containing ratio of horizontal directional fiber is the highest.Specifically, the containing ratio of vertical directional fiber is 0 to below 45%, and good is 0 to 40%.The containing ratio of vertical directional fiber than 45% big situation under, as described later, owing to the fiber weight per unit area of slot part 1 is low, so, be difficult to improve the intensity of the nonwoven fabric of width (WD).So, for example used under the situation of this nonwoven fabric 110 at surface patch as absorbent commodity, in the process of using this absorbent commodity, exist owing to produce fold or damaged danger at width (WD) with the friction of health.
The mensuration of fiber alignment is to use the digit microscope VHX-100 of Keyemce (Keyence) corporate system to carry out, and carries out according to following assay method.(1) be longitudinal direction with length direction (LD), sample is arranged on the observation platform, and the fiber that (2) will be flown to is nearby at random removed, and the focus of lens is focused on the fiber the most nearby of sample, (3) set the photography degree of depth (depth), the 3D rendering of sample is made on the PC picture.Then, (4) are converted to the 2D portrait with 3D portrait, draw many on (5) picture at the measurement range parallel lines of five equilibrium length direction (LD) in time.(6) observe in each unit of drawing the parallel lines sectionalization, fiber alignment is length direction (LD), or width (WD), is determined at the number of fiber of each direction orientation.Then, (7) with respect to the full number of fiber in the setting range, calculates in the ratio of the directed number of fiber of length direction (LD) with in the ratio of the directed number of fiber of width (WD), in view of the above, just can measure and calculate.
1.2.3 fiber density
As shown in Figure 3, slot part 1 is adjusted to convex shaped part 2 and compares, and the fibre density of fiber 101 is low.In addition, the fibre density of slot part 1 can be adjusted arbitrarily according to all conditions of the amount of the fluid (for example hot blast) that mainly is made of gas, tension force etc.The fibre density of the bottom of this slot part 1 specifically can be expressed at 0.18g/cm for example 3Below, good is 0.002 to 0.18g/cm 3, be more preferably 0.005 to 0.05g/cm 3Fibre density in the bottom of slot part 1 compares 0.002g/cm 3Under the low situation, for example this nonwoven fabric 110 is being used under the situation of absorbent commodity etc., is having the damaged easily situations of this nonwoven fabric 110.In addition, the fibre density in the bottom of this slot part 1 compares 0.18g/cm 3Under the high situation,,, bring the possibility of damp to the user downwards so there is the bottom that is trapped in this slot part 1 because liquid is difficult to shift.
Convex shaped part 2 is adjusted to slot part 1 and compares, the fibre density height of fiber 101 as above-mentioned.In addition, the fibre density of convex shaped part 2 can be adjusted arbitrarily according to all conditions of the amount of the fluid (for example hot blast) that mainly is made of gas, tension force etc.
Have, the sidepiece of this convex shaped part 2 can be adjusted arbitrarily according to all conditions of the amount of the fluid (for example hot blast) that mainly is made of gas, tension force etc. again.
The fibre density of the central portion 9 of convex shaped part 2 for example can express 0 to 0.20g/cm for example 3, good is 0.005 to 0.20g/cm 3, be more preferably 0.007 to 0.07g/cm 3Fibre density at this central portion 9 compares 0.005g/cm 3Under the low situation, because deadweight, the external pressure of the contained liquid of this central portion 9, central portion 9 is not only easily by conquassation, and, also exist the liquid that once absorbs adding the situation of returning easily of depressing.In addition, the fibre density at central portion 9 compares 0.20g/cm 3Under the high situation, exist these central portion 9 entrained liquid to be difficult to shift downwards, liquid holdup brings the situation of damp at this central portion 9 to the user.
Have again, the fibre density of sidepiece 8 can be according to the amount of the fluid (for example hot blast) that mainly constitutes by gas and all conditions of the line tension that applies when making nonwoven fabric 110 etc. adjust arbitrarily.Specifically, the fibre density of this sidepiece 8 can express 0 to 0.40g/cm for example 3, good is 0.007 to 0.25g/cm 3, be more preferably 0.01 to 0.20g/cm 3Fibre density at this sidepiece 8 compares 0.007g/cm 3Under the low situation, there is owing to line tension the situation that sidepiece 8 is stretched.In addition, the fibre density at this sidepiece 8 compares 0.40g/cm 3Under the high situation, exist because these sidepiece 8 entrained liquid are difficult to shift downwards, and be trapped in sidepiece 8, bring the possibility of damp to the user.
1.2.4 fiber weight per unit area
As shown in Figure 3, the bottom of slot part 1 is adjusted to convex shaped part 2 and compares, and the fiber weight per unit area of fiber 101 is low.In addition, the fiber weight per unit area of the bottom of slot part 1 is adjusted to low with on average comparing of the fiber weight per unit area of these nonwoven fabric 110 integral body that comprise slot part 1 and convex shaped part 2.
Convex shaped part 2 is adjusted to the bottom of slot part 1 and compares as above-mentioned, the average fiber weight per unit area height of fiber 101.In addition, the fiber weight per unit area of slot part 1 is adjusted to low with on average comparing of the fiber weight per unit area of nonwoven fabric 110 integral body that comprise slot part 1 and convex shaped part 2.
The average fiber weight per unit area of nonwoven fabric 110 integral body for example can express 10 to 200g/m for example 2, good is 20 to 100g/m 2This nonwoven fabric 110 is being used for compare 10g/m at the average fiber weight per unit area under the situation of the surface patch of absorbent commodity for example 2Under the low situation, there is the in use damaged easily situation of this surface patch.In addition, the average fiber weight per unit area at this nonwoven fabric 110 compares 200g/m 2Under the high situation, exist liquid to be shifted be difficult to the situation of carrying out swimmingly downwards.
As shown in Figure 3, the bottom of slot part 1 is adjusted to convex shaped part 2 and compares, and the fiber weight per unit area of fiber 101 is low.In addition, the fiber weight per unit area of slot part 1 is adjusted to and compares low with the average fiber weight per unit area of the nonwoven fabric integral body that comprises slot part 1 and convex shaped part 2.Specifically, the fiber weight per unit area of the bottom of slot part 1 can express 3 to 150g/m for example 2, good is 5 to 80g/m 2Fiber weight per unit area in the bottom of this slot part 1 compares 3g/m 2Under the low situation, for example be used under the situation of surface patch of absorbent commodity, exist the damaged easily situation of surface patch in the use of absorbent commodity at this nonwoven fabric.In addition, the fiber weight per unit area in the bottom of this slot part 1 compares 150g/m 2Under the high situation, exist this slot part 1 entrained liquid to be difficult to shift downwards, and be trapped in slot part 1, bring the possibility of damp to the user.
Convex shaped part 2 is adjusted to slot part 1 and compares as above-mentioned, the average fiber weight per unit area height of fiber 101.The fiber weight per unit area of the central portion 9 of convex shaped part 2 for example can express 15 to 250g/m for example 2, good is 20 to 120g/m 2Fiber weight per unit area at this central portion 9 compares 15g/m 2Under the low situation, because deadweight, the external pressure of the contained liquid of this central portion 9, not only easily by conquassation, and, also exist the liquid that once absorbs adding the situation of returning easily of depressing.In addition, the fiber weight per unit area at central portion 9 compares 250g/m 2Under the high situation, exist entrained liquid to be difficult to shift downwards, liquid holdup brings the situation of damp at this central portion 9 to the user.
Have again, as the fiber weight per unit area of the sidepiece 8 of the sidepiece of this convex shaped part 2 can be according to the amount of the fluid (for example hot blast) that mainly constitutes by gas and all conditions of the line tension that applies when making etc. adjust arbitrarily.Specifically, the fiber weight per unit area of this sidepiece 8 can express 20 to 280g/m for example 2, good is 25 to 150g/m 2Fiber weight per unit area at this sidepiece 8 compares 20g/m 2Under the low situation, the line tension that applies when existing, the situation that sidepiece 8 is stretched owing to manufacturing.In addition, the fiber weight per unit area at this sidepiece 8 compares 280g/m 2Under the high situation, exist because these sidepiece 8 entrained liquid are difficult to shift downwards, and be trapped in sidepiece 8, bring the possibility of damp to the user.
In addition, the fiber weight per unit area of the bottom of slot part 1 is adjusted to lower than the average fiber weight per unit area of convex shaped part 2 integral body that are made of sidepiece 8 and central portion 9.For example the fiber weight per unit area of the bottom of slot part 1 can be expressed average fiber weight per unit area with respect to convex shaped part 2 for example below 90%, and good is 3 to 90%, is more preferably 3 to 70%.The fiber weight per unit area of the bottom of slot part 1 with respect to the average fiber weight per unit area of convex shaped part 2 than 90% high situation under, drop into the resistance height of liquid when shift the below of nonwoven fabric 110 of slot part 1, the situation that exists liquid to overflow from slot part 1.In addition, the fiber weight per unit area of the bottom of slot part 1 with respect to the average fiber weight per unit area of convex shaped part 2 than 3% low situation under, for example be used under the situation of surface patch of absorbent commodity, exist the damaged easily situation of surface patch in the use of absorbent commodity at this nonwoven fabric.
1.2.5 other
In order to absorb or to see through the liquid of regulation and use under the situation of nonwoven fabric of present embodiment, because slot part 1 sees through liquid, convex shaped part 2 is vesicular structures for example, so, be difficult to keep liquid.
The bottom of slot part 1 is because the fibre density of fiber 101 is low, and the fiber weight per unit area is few, so be to be fit to article that liquid is seen through.Have again, because the fiber 101 of the bottom of slot part 1 is in width (WD) orientation, so, can prevent length direction (LD) excess flow of liquid, widely diffusion at slot part 1.Because low irrelevant with the fiber weight per unit area of slot part 1, the fiber 101 of slot part 1 is in width (WD) orientation, so, improved the intensity of the width (WD) of nonwoven fabric.
Though nonwoven fabric 110 is adjusted to the average fiber weight per unit area height of convex shaped part 2,, in view of the above, because the number of fiber increase, so the welding number of spots increases, and has kept vesicular structure.In addition, in convex shaped part 2, be adjusted to than the mode of the high sidepiece 8 of central portion 9 fiber weight per unit areas and fibre density and be formed with the central portion 9 that supports convex shaped part 2.That is, sidepiece 8 since the major part of its fiber 101 in length direction (LD) orientation, so fiber spacing is from shortening, in view of the above, fibre density improves, rigidity also improves.In view of the above, this sidepiece 8 supports convex shaped parts 2 integral body, can prevent convex shaped part 2 because of external pressure etc. by the situation of conquassation.
In addition, at slot part 1, the containing ratio of the horizontal directional fiber of per unit area is than central portion 9 height, and at sidepiece 8, the containing ratio of the vertical directional fiber of per unit area is than central portion 9 height.Then, at central portion 9, the fiber 101 directed at thickness direction (TD) contains than slot part 1, sidepiece more than 8.In view of the above, even by applying for example load to central portion 9, the thickness of convex shaped part 2 reduces, and under the situation that has discharged load, also owing to its rigidity at the directed fiber 101 of thickness direction (TD), convex shaped part 2 returns to original height easily.That is, can form the high nonwoven fabric of compression and back renaturation.
1.2.6 manufacture method
As Fig. 4 to shown in Figure 9, below, the method for the nonwoven fabric 110 of making present embodiment is described.At first, fiber web 100 is positioned in upper face side as the mesh-supported parts 210 of aeration support component.In other words, by mesh-supported parts 210, support fiber web 100 from downside.
The fiber 101 that good is constitutes fiber web 100 is parallel orientations.Parallel orientation be meant fiber web integral body at the ratio of the directed fiber of length direction (LD) more than 50%, be more preferably 60 to 95% directed state.In order to make fiber 101 be parallel orientation, can by the end of air (gas) is flowed to the fiber web 100 that forms by the comb and parallel cotton fibers prior to spinning method blow attached, to fiber arrange again during, the adjustment by utilizing line tension etc., this fiber web 100 that stretches forms.
The non-woven cloth manufacturing device 90 of making the nonwoven fabric 110 of present embodiment arrives shown in Figure 9 as Fig. 6, have aeration support component 200, ejection portion 910 and not shown air feed part and the conveyer 930 that goes out, 200 pairs of fiber webs 100 as fiber assembly of this aeration support component support from a face side; This ejection portion 910 and the not shown air feed part that goes out are as injection member, to the fiber web 100 that is supported from above-mentioned face side by aeration support component 200, spray the fluid that mainly constitutes by gas from another face side as the fiber web 100 of this fiber assembly as fiber assembly; This conveyer 930 makes the fiber web 100 as fiber assembly move at prescribed direction F as mobile member.
Aeration support component 200 is the fluids that mainly are made of gas that for example make from ejection portion 910 ejections of Fig. 6, that is, can the support component of opposition side ventilation of a side of this fiber web 100 to mounting at the fluid that mainly constitutes by gas of fiber web 100 ventilation.
As the aeration support component 200 that uses in the present embodiment, for example can express mesh-supported parts 210 as shown in Figure 4 for example.Mesh-supported parts 210 are to form by a plurality of metal wires 211 that inweave as the regulation rugosity of stuffiness portion.A plurality of metal wires 211 separate predetermined distance and are inweaved, and in view of the above, can obtain having formed the mesh-supported parts of a plurality of hole portions 213 as ventilating part.
Then, the mesh-supported parts 210 of the state that has supported this fiber web 100 are moved in prescribed direction, spray the fluid that mainly constitutes continuously, in view of the above, can make the nonwoven fabric 110 of present embodiment by gas from the upper face side of this fiber web that moves 100.
The mesh-supported parts 210 of Fig. 4 are the parts that formed the little hole portion 213 in a plurality of apertures as mentioned above, and the main fluid that is made of gas that sprays from the upper face side of fiber web 100 does not hamper this mesh-supported parts 210, is vented to the below.Flowing of the fluid that mainly is made of gas that these mesh-supported parts 210 change to spray greatly in addition, do not make fiber 101 move to the following direction of these mesh-supported parts 210.
Therefore, the fluid that mainly gas be made of of the fiber 101 of fiber web 100 by mainly spraying from upper face side moves in prescribed direction.Specifically, because be limited, so fiber 101 moves in the surperficial such direction along these mesh-supported parts 210 to the mobile of lower side of mesh-supported parts 210.
For example, sprayed mainly the fiber 101 in zone of the fluid that constitutes by gas to moving with this zone adjacent areas.Then, spray mainly the zone of the fluid that is made of gas and move in prescribed direction, therefore, the result is, to moving with the zone of the side in the continuous zone of the prescribed direction of having sprayed mainly the fluid that is made of gas.
In view of the above, form slot part 1, simultaneously, the vertical directional fiber of the bottom of slot part 1 moves to sidepiece 8 sides (both sides of slot part 1) of convex shaped part 2, and the horizontal directional fiber of the bottom of slot part 1 remains in this slot part 1.In view of the above, the fiber 101 of the bottom of slot part 1 is integrally in width (WD) orientation.In addition, the vertical directional fiber that moves from slot part 1 is directed onto the sidepiece 8 of this convex shaped part 2.Therefore, the fibre density of the sidepiece 8 of this convex shaped part 2 improves, and simultaneously, forms fiber 101 integrally at the directed sidepiece 8 of length direction (LD).
Here, in non-woven cloth manufacturing device 90, one side is by mobile member, and moving web 100 successively, and one side forms nonwoven fabric 110.This mobile member makes the fiber web 100 as fiber assembly of the state that supported from face side by above-mentioned aeration support component 200 move to prescribed direction.Specifically, make injected and have mainly the fiber web 100 of the state of the fluid that constitutes by gas move at prescribed direction F.As mobile member, can express conveyer for example shown in Figure 6 930 for example.Conveyer 930 has the aeration belt portion 939 and the rotating part 931,933 of aeration, and these aeration belt portion 939 mounting aeration support components 200 are formed the ring-type of horizontal length; This rotating part 931,933 is configured in the two ends of length direction (LD) in the inboard of the aeration belt portion 939 of the ring-type that is formed horizontal length, and the aeration belt portion 939 of this ring-type is rotated in prescribed direction.
Conveyer 930 is as above-mentioned, and the mesh-supported parts 210 that supported the state of fiber web 100 from following side are moved at prescribed direction F.Specifically, as shown in Figure 6, fiber web 100 moves in the mode of the downside by ejection portion 910.Further, fiber web 100 moves in the mode as the inside of the heater portion 950 of heater by the two sides opening.
Injection member has not shown air feed part and the ejection portion 910 that goes out.The not shown air feed part that goes out links with ejection portion 910 by snorkel 920.Snorkel 920 can be connected the upside of ejection portion 910 with ventilating.As shown in Figure 9, in ejection portion 910, form a plurality of ejiction openings 913 with predetermined distance.
Never the air feed part that illustrates is by supply gas a plurality of ejiction openings 913 ejections of gas from forming in ejection portion 910 of ejection portion 910 of snorkel 920.Be ejected into continuously by the upper face side of mesh-supported parts 210 from the gas of a plurality of ejiction opening 913 ejections from the fiber web 100 of following side support.Specifically, be ejected into the upper face side of the fiber web 100 of the state that moves at prescribed direction F by conveyer 930 continuously from the gas of a plurality of ejiction openings 913 ejections.
Below ejection portion 910,915 pairs of the suction unit of downside that are configured in mesh-supported parts 210 are from 910 ejections of ejection portion, and carry out air-breathing at the gas of mesh-supported parts 210 ventilations etc.Here, by this suction unit 915 carry out air-breathing, can also position, fiber web 100 is laid on the mesh-supported parts 210.Further, can be by air-breathing, the main fluid that is made of gas that prevents to collide the metal wire 211 of mesh-supported parts 210 flies back, upset the shape of fiber web 100, in addition, can under the state of the shape of the slot part of further guaranteeing to be shaped (concavo-convex) etc., in heater portion 950, transport by air flow.In this case, good is when air flow carries out moulding, and one side is air-breathing, and one side is transported to heater portion 950.
The attraction that suction unit 915 is carried out is so long as the fiber 101 in the zone of the injected fluid that mainly is made of gas is pushed to the intensity of the degree of mesh-supported parts 210 gets final product.
The temperature of the fluid that mainly is made of gas that sprays respectively from ejiction opening 913 is as above-mentioned, so long as normal temperature gets final product, but, for example in order to make the good forming ability of slot part (concavo-convex) etc., can adjust to more than the softening point of the fiber of thermoplasticity at least that constitutes fiber assembly, good is to adjust to more than the softening point, fusing point+50 ℃ to-50 ℃ temperature.If because fiber softening, then the reaction force of fiber itself reduces, so guarantee the shape that fiber is arranged by air flow etc. again easily, because if further improve temperature, then fiber thermal welding each other begins, so, further guarantee the shape of slot part (concavo-convex) etc. easily.In view of the above, under the state of the shape of having guaranteed slot part (concavo-convex) etc., be transported to easily in the heater portion 950.
In addition, the air quantity by the fluid that mainly is made of gas that adjust to spray, temperature, introducing amount, the aeration of mesh-supported parts 210, the fiber weight per unit area of fiber web 100 etc. can make the change of shape of convex shaped part 2.For example, amount approximate equality at the fluid that mainly constitutes by gas of the amount of the fluid that mainly constitutes by gas that sprays and attraction (air-breathing), perhaps attract under the many situations of the amount of the fluid that mainly is made of gas of (air-breathing), the inside side of the convex shaped part 2 of nonwoven fabric 110 is formed in the mode along the shape of mesh-supported parts 210.Therefore, under mesh-supported parts 210 were smooth situation, the inside side of this nonwoven fabric 110 was a general planar.
In addition, for under the state of the shape of more having guaranteed slot part (concavo-convex) etc. by moulding such as air flows, transport to heater portion 950, the moulding of the slot part (concavo-convex) that can carry out at air flow etc. etc. has just finished the back or has transported in heater portion 950 simultaneously, perhaps after the moulding of slot part (concavo-convex) that hot blast (air flow of set point of temperature) carries out etc. has just finished, by coolings such as cold wind, then, transport to heater portion 950.
As the heater portion 950 of heater its at the two ends of prescribed direction F by opening.In view of the above, formed heating space is detained the stipulated time to the fiber web 100 of mounting (nonwoven fabric 110) in the inside of heater portion 950 on the aeration support component 200 that moves by conveyer 930, moves continuously.For example, contain under the situation of thermoplasticity fiber, can access heating, the nonwoven fabric 115 that fiber 101 is bonded to each other by this heater portion 950 at the fiber 101 that constitutes fiber web 100 (nonwoven fabric 110).
2 other embodiments
Below, other embodiment of nonwoven fabric of the present invention is described.In addition, in the embodiment below, do not have the part of special instruction identical,, mark identical symbol adding notes under the yet identical situation of the symbol of accompanying drawing with first embodiment with first embodiment of nonwoven fabric.
Use Figure 10 to Figure 16, second embodiment to the, six embodiments of nonwoven fabric of the present invention are described.Second embodiment is other a embodiment of the shape of relevant nonwoven fabric.The 3rd embodiment is other a embodiment of the form of relevant nonwoven fabric.The 4th embodiment is other a embodiment of the form of relevant nonwoven fabric.The 5th embodiment is other a embodiment of convex shaped part and slot part.The 6th embodiment is other a embodiment of the opening of relevant nonwoven fabric.
2.1 second embodiment
2.1.1 shape
As shown in figure 10, the nonwoven fabric 114 of present embodiment is the nonwoven fabric of two sides general planar.Then, be the nonwoven fabric in different zone such as fiber alignment of having formed the regulation zone.Below, be that the center describes with difference with first embodiment.
2.1.2 fiber alignment
As shown in figure 10, on nonwoven fabric 114, form the different a plurality of zones of containing ratio of vertical directional fiber.The different a plurality of zones of containing ratio of vertical directional fiber can be expressed for example in this nonwoven fabric 114, the vertical directed portion 13 that the containing ratio of vertical directional fiber is the highest, compare with vertical directed portion 13 as second area, the containing ratio of the central portion 12 in conduct the 3rd zone that the containing ratio of vertical directional fiber is low, vertical directional fiber is minimum, and the highest horizontal directed portion 11 as the first area of the containing ratio of horizontal directional fiber.Then, on this nonwoven fabric 114,, form a plurality of vertical directed portions 13 respectively along each both sides of the directed portion of a plurality of horizontal strokes 11.In addition, a plurality of central portions 12 are positioned at each the sidepiece of horizontal directed portion 11 side opposition sides with this a plurality of vertical directed portion 13, are respectively formed at the zone that is clipped by adjacent vertical directed portion 13.
Horizontal directed portion 11 is in fiber web 100, is being directed onto vertical directed portion 13 rear flank as the directed fiber 101 of the length direction (LD) of longitudinal direction by the fluid that mainly is made of gas, the zone that is formed by residual fiber 101.That is because towards the fiber 101 of length direction (LD) by the fluid that mainly constitutes by gas to vertical directed portion 13 side shiftings, so, in the directed portion 11 of horizontal stroke, mainly remain in the horizontal directional fiber of width (WD) orientation as transverse direction.Therefore, the great majority of the fiber 101 of horizontal directed portion 11 are in direction (width (the WD)) orientation of intersecting with respect to length direction (LD).Though horizontal directed portion 11 is as described later, it is low to be adjusted to the fiber weight per unit area, because the major part of fiber 101 that should horizontal stroke orientation portion 11 is in width (WD) orientation, so, the TENSILE STRENGTH raising of width (WD).In view of the above,, in wearing, be applied in the power of the friction etc. of width (WD), also can have prevented breakage even for example under the situation of the surface patch that this nonwoven fabric 114 has been used in absorbent commodity.
In addition, vertical directed portion 13 is in fiber web 100, and the fiber 101 injected fluids that mainly are made of gas by towards length direction (LD) are directed onto vertical directed portion 13 sides and form.Then, because the majority of fiber 101 that should vertical directed portion 13 is in length direction (LD) orientation, so the fiber spacing that is formed each fiber 101 is from constriction, fibre density improves.Therefore, rigidity also improves.
2.1.3 fiber density
As shown in figure 10, the injected fluid that mainly constitutes by gas, the fiber 101 of horizontal directed portion 11 moves, and simultaneously, by the pressure of the injected fluid that mainly is made of gas, fiber 101 moves, and concentrates to the downside of the thickness direction (TD) of nonwoven fabric 114.Therefore, its spatial area rate of the upside of the thickness direction of nonwoven fabric 114 (TD) is big, and the lower side space area occupation ratio is little.In other words, the upside fibre density of the thickness direction of nonwoven fabric 114 (TD) is low, downside fibre density height.
In addition, horizontal directed portion 11 is by the injected fluid that mainly is made of gas, and the fiber 101 of horizontal directed portion 11 moves, and the mode low with fibre density forms.Relative therewith, because vertical directed portion 13 becomes the zone that the fiber 101 that moves from the directed portion 11 of horizontal stroke is concentrated, so, be formed with the directed portion 11 of horizontal stroke and compare the fibre density height.The fibre density of central portion 12 is formed in the fibre density of horizontal directed portion 11 and indulges in the middle of the fibre density of directed portion 13.
2.1.4 fiber weight per unit area
As shown in figure 10, because because the fluid that mainly constitutes by gas that directed sidelong portion 11 sprays, fiber 101 moves to other zone, so the fiber weight per unit area of horizontal directed portion 11 is minimum.In addition, be sprayed onto the fiber 101 that moves from the directed portion 11 of horizontal stroke, so vertical directed portion 13 fiber weight per unit areas are the highest by the fluid that mainly constitutes by gas.Then, clip both sides, form central portion 12 in this vertical directed portion 13.Promptly, become the central portion 12 in the few zone of fiber weight per unit area, horizontal directed portion 11 because the high vertical directed portion 13 of fiber weight per unit area is formed on both sides, so, even the fiber weight per unit area is low, for example in making the process of this nonwoven fabric 114, the situation that also can suppress because line tension etc. is stretched.
2.1.5 other
This nonwoven fabric 114 is for example under the situation that the surface patch as absorbent commodity uses, can be under the state of keeping the horizontal directed portion 11 of the low state of fiber weight per unit area, central portion 12, promptly, under the state that can not be stretched, can use nonwoven fabric 114 by line tension in the goods manufacturing etc.Then, because between directed portion 11 of horizontal stroke and central portion 12, form the high vertical directed portion 13 of fiber weight per unit area respectively, so, when containing liquid etc., be difficult to take place this nonwoven fabric 114 because the weight of liquid, deadweight and by the situation of conquassation.Therefore, even drained liquid repeatedly also can make liquid not in surface diffusion into the surface, and shift to the below of this nonwoven fabric 114.
2.1.6 manufacture method
Below, the method for the nonwoven fabric 114 of making present embodiment is described.At first, fiber web 100 is positioned in upper face side as the mesh-supported parts 210 of aeration support component.In other words, by mesh-supported parts 210, support fiber web 100 from downside.These mesh-supported parts 210 can use the mesh-supported parts identical with the mesh-supported parts 210 of first embodiment.
Then, the mesh-supported parts 210 of the state that has supported this fiber web 100 are moved in prescribed direction, the upper face side by the fiber web 100 that moves from this sprays the fluid that mainly is made of gas continuously, can make the nonwoven fabric 114 of present embodiment.
The amount of the fluid that mainly is made of gas that is ejected into this nonwoven fabric 114 is so long as spray mainly the fiber 101 of fiber web 100 in the zone of the fluid that is made of gas and can get final product in the mobile degree of width (WD).In this case, though good is not undertaken air-breathing by the suction unit 915 that the injected fluid that mainly is made of gas is drawn into the downside of mesh-supported parts 210, but, also can carry out air-breathing with the degree that the directed portion 11 of horizontal stroke is not pushed to mesh-supported parts 210.
In addition, also can spray the fluid that mainly constitutes by gas, form concavo-convex nonwoven fabric with for example slot part, convex shaped part 2 etc. after, by being wound in roller etc., with the concavo-convex conquassation that forms.
Have again, by introducing the fluid that mainly is made of gas from the downside of mesh-supported parts 210, because fiber 101 one sides in the zone of the injected fluid that mainly is made of gas are pushed to this mesh-supported parts 210 sides, one side moves, therefore, fiber concentrates on mesh-supported parts 210 sides.In addition, in central portion 12 and vertical directed portion 13, the injected main fluid that is made of gas conflicts with mesh-supported parts 210, flies back, and therefore, partly becomes fiber at the directed state of thickness direction (TD).
The nonwoven fabric 114 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 114 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
2.2 the 3rd embodiment
By Figure 11, Figure 12, the 3rd embodiment of nonwoven fabric of the present invention is described.
2.2.1 nonwoven fabric
As Figure 11, shown in Figure 12, it is different with first embodiment that the nonwoven fabric 116 of present embodiment alternatively has the fluctuating this respect in the integral body of this nonwoven fabric 116 at length direction (LD).Below, be that the center describes with the difference.
The nonwoven fabric 116 of present embodiment be formed these nonwoven fabric 116 integral body with slot part 1 and convex shaped part 2 with respect to the direction of the extending mode of quadrature roughly, have flexuosity.
2.2.2 manufacture method
Though the nonwoven fabric 116 of present embodiment can similarly form with first embodiment,, as the form difference of the mesh-supported parts 260 of aeration support component 200.The mesh-supported parts 260 of present embodiment form by a plurality of metal wires 261 that inweave as the regulation rugosity of stuffiness portion.Separate predetermined distance by a plurality of metal wires 261 and inweaved, can access the mesh-supported parts that are formed with a plurality of hole portions 263 as ventilating part.
Have, these mesh-supported parts 260 are the support components that have flexuosity in any one the parallel direction with the length direction of these mesh-supported parts 260 or short side direction again.In the present embodiment, for example, as shown in figure 12, be formed in the direction parallel and alternatively have flexuosity with axle Y.
The mesh-supported parts 260 of Figure 12 are the parts that are formed with the little hole portion 263 in a plurality of apertures as mentioned above, and the gas that sprays from the upper face side of fiber web 100 does not hamper this mesh-supported parts 260, are vented to the below.Flowing of the fluid that mainly is made of gas that these mesh-supported parts 260 change to spray greatly in addition, do not make fiber 101 move to the following direction of these mesh-supported parts 260.
Have again, because these mesh-supported parts 260 itself have flexuosity, so by the fluid that mainly is made of gas that the upper face side from fiber web 100 sprays, fiber web 100 is formed as has the shape that rises and falls like that along the shape of these mesh-supported parts 260.
Spray the fluid that mainly is made of gas by a fiber web 100 towards mounting on mesh-supported parts 260, one side makes this fiber web 100 move along the axle directions X, can form the nonwoven fabric 116 of present embodiment.
The sample attitude of the fluctuating of mesh-supported parts 260 can at random be set.For example, the spacing that can express for example between the top of fluctuating to the axle directions X shown in Figure 12 is 1 to 30mm, and good is 3 to 10mm.In addition, the top of the fluctuating of these mesh-supported parts 260 and the difference of height of bottom for example can express 0.5 to 20mm for example, and good is 3 to 10mm.Have again, the cross sectional shape of the axle directions X of these mesh-supported parts 260 as shown in figure 12, be not limited to wavyly, can express for example with each summit of the top and bottom that rise and fall and be shape that the mode general triangular of acute angle links to each other, be the roughly dimetric concavo-convex shape that links to each other of mode etc. of general planar with each summit of the top and bottom of fluctuating.
The nonwoven fabric 116 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 116 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
2.3 the 4th embodiment
By Figure 13, the 4th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 13, the nonwoven fabric 140 of present embodiment is different with first embodiment with the sample attitude of the face of the opposition side of the face that is formed with slot part 1 and convex shaped part 2 of this nonwoven fabric 140.In addition, below, be that the center describes with difference with first embodiment.
2.3.1 nonwoven fabric
The nonwoven fabric 140 of present embodiment is formed with slot part 1 and convex shaped part 2 alternately side by side in its one side side.Then, in the another side side of nonwoven fabric 140, the zone that is equivalent to the bottom surface of convex shaped part 2 is formed the side of being given prominence to towards this convex shaped part 2 and is protruding.In other words, nonwoven fabric 140 is in the another side side of this nonwoven fabric 140, is equivalent to the area depression of bottom surface of the convex shaped part 2 of this one side side, forms recess.Then, the zone of bottom surface of slot part 1 that is equivalent to this one side side is outstanding, forms convex shaped part.
2.3.2 manufacture method
The manufacture method of the nonwoven fabric 140 of present embodiment is identical with the record of the first above-mentioned embodiment.The support component that uses when in addition, making this nonwoven fabric 140 can use the support component identical with the mesh-supported parts 210 of the first above-mentioned embodiment.
In the present embodiment, fiber web 100 is positioned on the mesh-supported parts 210, one side is sprayed the fluid that mainly is made of gas, one side makes this fiber web 100 move along the direction of regulation, simultaneously, the fluid that mainly constitutes that is sprayed from the below attraction (air-breathing) of mesh-supported parts 210 by gas.Then, make the amount of the fluid that mainly constitutes by gas of attraction (air-breathing) less than the amount of the fluid that mainly constitutes by gas that sprays.Like this, under the situation of the main fluid that constitutes by gas greater than the amount of the main fluid that constitutes by gas that attracts (air-breathing) of spraying, the fluid that mainly is made of gas that sprays for example conflicts with mesh-supported parts 210 as the aeration support component, flies back slightly.Then, the fly back main fluid side direction upper face side below convex shaped part 2 that is made of gas of mesh-supported parts 210 passes.In view of the above, the following side (bottom surface side) of convex shaped part 2 is to be formed to the outstanding mode of the direction identical with the upper face side of convex shaped part 2.
The nonwoven fabric 140 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 140 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
2.4 the 5th embodiment
By Figure 14, the 5th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 14, the nonwoven fabric 150 of present embodiment be formed with the convex shaped part 2 that forms in the one side side of this nonwoven fabric 150 at the second different convex shaped part 22 of the height of thickness direction (TD), this point is different with the first above-mentioned embodiment.Below, be that the center describes with difference with first embodiment.
2.4.1 nonwoven fabric
It is the nonwoven fabric that is formed with a plurality of slot parts 1 in the one side side of this nonwoven fabric 150 side by side.Then, form a plurality of convex shaped parts 2 at a plurality of slot parts of roughly equally spaced forming 1 between each.In addition, across adjacent a plurality of convex shaped parts of a plurality of slot part 12 between each, across a plurality of slot part 1 each, alternatively form a plurality of second convex shaped parts 22 respectively.In other words, respectively across a plurality of slot parts 1, form the convex shaped part 2 and second convex shaped part 22 alternately side by side.
The convex shaped part 2 and second convex shaped part 22 are zones that do not have the injected fluid that mainly is made of gas of fiber web 100, are by forming slot part 1, becoming the convex shaped part in relatively outstanding zone.Second convex shaped part 22 for example is formed and compares with convex shaped part 2, the height of the thickness direction of this nonwoven fabric 150 (TD) is low, the length of width (WD) is also little, but, fiber density, fiber alignment and fiber weight per unit area etc. for this second convex shaped part 22 similarly form with convex shaped part 2.
The convex shaped part 2 of nonwoven fabric 150 and the configuration of second convex shaped part 22 are between each, to form the convex shaped part 2 and second convex shaped part 22 at a plurality of slot parts of forming side by side 1.Then, convex shaped part 2 is to be formed across slot part 1 mode adjacent with second convex shaped part 22.In addition, on the contrary second convex shaped part 22 is to be formed across slot part 1 and convex shaped part 2 adjacent modes.That is, the convex shaped part 2 and second convex shaped part 22 alternatively form across slot part 1.Specifically, be to form according to convex shaped part 2, slot part 1, second convex shaped part 22, slot part 1, convex shaped part 2 such reiterations.In addition, the position of the convex shaped part 2 and second convex shaped part 22 relation is not limited thereto, and can be that the part of nonwoven fabric 150 at least forms across the adjacent respectively mode of slot part 1 with a plurality of convex shaped parts 2.In addition, also can be that the part of nonwoven fabric 150 at least forms across the adjacent respectively mode of slot part 1 with a plurality of second convex shaped parts 22.
2.4.2 manufacture method
Though the manufacture method of the nonwoven fabric 150 of present embodiment is identical with the record of first embodiment, the sample attitude difference of the ejiction opening 913 of the non-woven cloth manufacturing device 90 that in the manufacturing of nonwoven fabric 150, uses.
By one towards be positioned in mesh-supported parts 260 above fiber web 100 spray the fluid that mainly constitutes by gas, one side makes it to move in prescribed direction, forms nonwoven fabric 150.Though when spraying mainly the fluid that constitutes by gas, form slot part 1, convex shaped part 2 and second convex shaped part 22, but their formation can at random be changed according to the sample attitude of the ejiction opening 913 of the fluid that mainly is made of gas of non-woven cloth manufacturing device 90.
As shown in figure 14, form this nonwoven fabric 150, can be for example undertaken by the interval of adjusting the ejiction opening 913 that sprays mainly the fluid that constitutes by gas.For example, narrower by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first embodiment, can form with convex shaped part 2 and compare, second convex shaped part 22 that the height of thickness direction (TD) is low.In addition, wideer by the interval that makes ejiction opening 913 than the interval of the ejiction opening 913 of first embodiment, can form with convex shaped part 2 and compare, the high convex shaped part of height of thickness direction (TD).Like this, by at the interval that forms ejiction opening 913,, form this nonwoven fabric 150 that the convex shaped part 2 and second convex shaped part 22 alternatively dispose side by side across slot part 1 with narrow interval and wide interval alternant way configuration ejiction opening 913.The interval of this ejection 913 can at random form according to the height of the convex shaped part 2 of the nonwoven fabric of wanting to form and the arrangement of second convex shaped part 22.
The nonwoven fabric 150 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 150 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
2.5 the 6th embodiment
By Figure 15, Figure 16, the 6th embodiment of nonwoven fabric of the present invention is described.
As shown in figure 15, the nonwoven fabric 160 of present embodiment is the nonwoven fabric that is formed with a plurality of peristomes 3.Do not form convex shaped part and slot part, around peristome 3, adjust fiber alignment, fiber density and fiber weight per unit area, this point is different with first embodiment.Below, be that the center describes with the difference.
2.5.1 nonwoven fabric
As shown in figure 15, the nonwoven fabric 160 of present embodiment is the nonwoven fabric that is formed with a plurality of peristomes 3.
Length direction (LD) along as this fiber web 100 of the direction of for example spraying mainly from the fluid that is made of gas to the fiber web 100 as fiber assembly roughly equally spaced forms a plurality of peristomes 3.In addition, the interval of the width of fiber web 100 (WD) also roughly equally spaced forms a plurality of peristomes 3.Here, the interval of formation peristome 3 also can be for example all to form with different intervals at width (WD) at length direction (LD).
Each is formed circular or substantially elliptical this a plurality of peristome 3.Then, each fiber 101 of a plurality of peristome 3 is with the mode orientation around peristome 3.That is, the end of the length direction of peristome 3 (LD) is in the direction orientation of intersecting with respect to this length direction (LD), and in addition, the sidepiece of the length direction of peristome 3 (LD) is with the mode orientation along this length direction (LD).
In addition, because the fiber 101 on every side of these a plurality of peristomes 3 moves around this peristome 3 by the fluid that mainly is made of gas that sprays, so the fibre density on every side of this peristome 3 is adjusted to the fibre density height than other zone.
Then, at the thickness direction (TD) of this nonwoven fabric 160, the fibre density that is formed face (below) side that is positioned on the support component 220 (Figure 16) than with by the fibre density height of face (top) side of the face opposition side of mounting.This is that the fiber 101 that has the free degree in fiber web 100 concentrates on support component 220 sides because because the pressure of the fluid that mainly is made of gas of gravity or injection.
2.5.2 manufacture method
Though the manufacture methods of present embodiment etc. are identical with the manufacture method of above-mentioned first embodiment,, in this nonwoven fabric 160, this point of slot part and convex shaped part is different not forming.Below, be that the center describes with the difference.
The aeration support component that is used to form nonwoven fabric shown in Figure 15 160 for example can be expressed support component 220 as shown in Figure 16 for example.That is, be on the mesh-supported parts 210 of Fig. 4, with the predetermined distance almost parallel disposing the support component of a plurality of elongate parts 225.Elongate parts 225 are parts of stuffiness, for example, do not make from the fluid that mainly is made of gas of upper side injection and ventilate to the lower side.Then, main its flow direction of fluid that is made of gas that is ejected into elongate parts 225 is changed.
Then, fiber web 100 can be positioned on the support component 220, the support component 220 under the state that is supporting fiber web 100 is moved in prescribed direction,,, make this nonwoven fabric 160 with this from the upper face side of the fiber web 100 that moves gas jet continuously.
Specifically, by spraying the fluid that mainly constitutes continuously by gas, do not form the slot part and the convex shaped part of first embodiment, but by fluid that mainly constitutes by gas that sprays and/or the fluid that mainly constitutes that sprays by gas, just in fiber web 100 ventilations, simultaneously, changed the main fluid that constitutes by gas of the direction that flows by elongate parts 225, formed peristome 3.
In addition, be ejected into the amount of the fluid that mainly constitutes by gas of this nonwoven fabric 160 so long as spray mainly the degree that the fiber 101 of fiber web 100 in the zone of the fluid that is made of gas can move and get final product.In this case, the suction unit 915 that also can not introduce the downside of support component 220 by the main fluid that is made of gas that will spray attracts (air-breathing).In order not make the fluid that mainly constitutes by gas because of the support component 220 that flies back, upset the shape of the fiber web 100 of moulding, good is attracts (air-breathing) from the below of support component 220.The measured of fluid that attracts (air-breathing) mainly to be made of gas is the amount that fiber web 100 is not pushed to the degree of support component 220 (not by conquassation).
In addition, only form the situation of peristome 3 like that, can also spray the fluid that mainly constitutes by gas except above-mentioned, with peristome 3 form concavo-convex after, be wound up into roller etc., conquassation is concavo-convex.
In addition, as other manufacture method,, can use tabular dish with ventilating part as support component.Specifically, fiber web 100 is positioned on the tabular dish, one side makes this support component of the state that is supporting fiber web 100 move in prescribed direction, and one side is sprayed the fluid that mainly is made of gas off and on, with this, makes this nonwoven fabric 160.
Because the integral body of the dish that this is tabular becomes stuffiness portion, so the fluid that mainly is made of gas that sprays off and on forms peristome 3 with the main fluid that is made of gas that its flow direction has been changed.In other words, the part at the injected fluid that mainly is made of gas forms peristome 3.
The nonwoven fabric 160 of present embodiment can be made by above-mentioned non-woven cloth manufacturing device 90.The manufacture methods of the nonwoven fabric 160 of this non-woven cloth manufacturing device 90 etc. can be with reference to the record of the explanation of the manufacture method of the nonwoven fabric 110 of first embodiment and non-woven cloth manufacturing device 90.
3 embodiment
3.1 first embodiment
[fiber formation]
Use heart sheath structure, average fineness 3.3dtex, the long 51mm of average fiber, the coating of high density polyethylene (HDPE) and polyethylene terephthalate that the fiber A of hydrophilic finish is arranged and be that with the difference of fiber A coating is to refuse the mixed cotton of the fiber B of water finish.Use the mixing ratio of fiber A and fiber B to be 70:30, the fiber weight per unit area is adjusted to 40g/m 2Fiber assembly.
[creating conditions]
With the diameter is 1.0mm, and spacing is the ejiction opening 913 that 6.0mm forms a plurality of Fig. 9.In addition, being shaped as of ejiction opening 913 is just round, and the cross sectional shape of the breather pipe that fluid passed through that mainly is made of gas that is communicated with ejiction opening 913 of ejection portion 910 is a cylinder type.The width of ejection portion 910 is 500mm.With temperature is 80 ℃, and air quantity is the condition that 600l/ divides, to the fiber web injection hot blast of said structure.
With the fibre structure shown in the front, be that the carding machine that 20m/ divides is opened fibre by speed, make fiber web, it is 450mm that fiber web is cut into width.Then, with the speed that 3m/ divides, fiber web is transported on the net to the aeration of 20 sieve apertures.In addition,, spray hot blast, on the other hand,, attract (air-breathing) from the below of aeration net with the uptake of lacking than the hot blast rate that sprays to fiber web according to based on the creating conditions of ejection portion 910 shown in the front and ejiction opening 913.Then, under the state that transports by the aeration net, be 130 ℃ according to temperature, the hot blast air quantity is to transport about 30 seconds in the baker set of 10Hz.
[result]
Central portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 68:22, and the fiber weight per unit area is 48g/m 2, thickness is 3.5mm, fibre density is 0.01g/cm 3, the width of each this central portion is 2.5mm, spacing is 6.1mm.
Horizontal directed portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 35:65, and the fiber weight per unit area is 37g/m 2, thickness is 3.4mm, fibre density is 0.01g/cm 3, the width that each should horizontal stroke orientation portion is 1.4mm, spacing is 6.1mm.
Vertical directed portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 72:28, and the fiber weight per unit area is 49g/m 2, thickness is 3.5mm, fibre density is 0.01g/cm 3, each width that should indulge directed portion is 1.1mm, spacing is 3.6mm.
Shape: form vertical directed portion in the both sides of central portion.Then, central portion, vertical directed portion and the horizontal directed portion mode that (LD) extends continuously with along its length form, and form repeatedly mutually at width (WD).In addition, with from the face side of this nonwoven fabric towards the inside, the mode that fibre density improves gradually is formed.The fiber alignment of particularly vertical directed portion as main body towards length direction (LD).Then, the height of the thickness direction of this nonwoven fabric (TD) forms roughly certain.
3.2 second embodiment
[fiber formation]
Fiber constitutes identical with first embodiment.
[creating conditions]
Design with ejection portion 910 shown in the front and ejiction opening 913, with temperature is 105 ℃, and air quantity is that the condition that 1000l/ divides is sprayed hot blast, on the other hand, with roughly the same with hot blast rate or many slightly uptake, attract (air-breathing) from the below of aeration net.
[result]
Central portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 73:27, and the fiber weight per unit area is 48g/m 2, thickness is 3.5mm, fibre density is 0.02g/cm 3, the width of each this central portion is 2.5mm, spacing is 6.1mm.
Slot part: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 29:71, and the fiber weight per unit area is 17g/m 2, thickness is 1.8mm, fibre density is 0.009g/cm 3, the width of each this slot part is 1.4mm, spacing is 6.1mm.
Sidepiece: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 81:19, and the fiber weight per unit area is 49g/m 2, thickness is 3.2mm, fibre density is 0.03g/cm 3, the width of each this sidepiece is 1.1mm, spacing is 3.6mm.
Shape: the both sides at central portion form sidepiece, in addition, by central portion and sidepiece, form convex shaped part.In addition, form slot part along convex shaped part.Then, convex shaped part and slot part all are that the mode that (LD) extends with along its length forms, and form repeatedly mutually at width (WD).Have, towards the inside side, fibre density improves gradually from the face side of this nonwoven fabric again, and the fiber alignment of slot part is formed as main body towards length direction (LD).
3.3 the 3rd embodiment
[fiber formation]
Fiber constitutes identical with first embodiment.
[creating conditions]
Pass through under the formed fibroreticulate state of the fibre structure shown in the front supporting, being that temperature is that 130 ℃, hot blast air quantity are to transport about 30 seconds in the baker of 10Hz to setting by the aeration net shown in the front.Then, just transporting back (after about two seconds) in baker, using ejection portion 910 and the ejiction opening 913 shown in the front, is 120 ℃ with temperature, and air quantity is the condition that 2200l/ divides, and sprays hot blast.
[result]
Central portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 64:36, and the fiber weight per unit area is 37g/m 2, thickness is 3.3mm, fibre density is 0.01g/cm 3, the width of each this central portion is 1.9mm, spacing is 6.1mm.
Slot part: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 32:71, and the fiber weight per unit area is 23g/m 2, thickness is 1.1mm, fibre density is 0.02g/cm 3, the width of each this slot part is 2.1mm, spacing is 6.1mm.
Sidepiece: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 72:28, and the fiber weight per unit area is 39g/m 2, thickness is 3.2mm, fibre density is 0.01g/cm 3, the width of each this sidepiece is 1.5mm, spacing is 3.6mm.
Shape: formed convex shaped part and slot part.
3.4 the 4th embodiment
[fiber formation]
Fiber constitutes identical with first embodiment.
[creating conditions]
With the design of ejection portion 910 shown in the front and ejiction opening 913, be 80 ℃ with temperature, air quantity is the condition that 1800l/ divides, jet airstream.Then, by being that spacing and the width (WD) of 5mm is the spacing of 5mm with length direction (LD), be configured to jagged pin, with 200 times/minute, alongst (LD) towards direction, speed is the 3m/ branch, and the fiber web that the fiber shown in the front is constituted carries out acupuncture, makes fiber half interlacing each other.Then, create conditions jet airstream with ejection portion 910 shown in the front and ejiction opening 913.In addition, simultaneously with hot blast rate about equally or many slightly uptakes, attract (air-breathing) from the below of aeration net.
[result]
Central portion: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 69:31, and the fiber weight per unit area is 45g/m 2, thickness is 2.5mm, fibre density is 0.02g/cm 3, the width of each this central portion is 2.4mm, spacing is 5.7mm.
Slot part: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 35:65, and the fiber weight per unit area is 27g/m 2, thickness is 1.9mm, fibre density is 0.01g/cm 3, the width of each this slot part is 1.0mm, spacing is 5.7mm.
Sidepiece: at the directed fiber of length direction (LD) with at the ratio of the directed fiber of width (WD) is 75:25, and the fiber weight per unit area is 45g/m 2, thickness is 2.3mm, fibre density is 0.02g/cm 3, the width of each this sidepiece is 0.8mm, spacing is 4.0mm.
Shape: convex shaped part and the slot part mode that (LD) extends with along its length forms continuously.In addition, this convex shaped part and slot part have partly towards the interlacing point of below, and (WD) is formed mutually repeatedly at width.
4 make use-case
As the purposes of nonwoven fabric of the present invention, for example can express the surface patch etc. of the absorbent commodity of sanitary napkin, liner, diaper etc. for example.In this case, though convex shaped part be skin face side, the inside side which all can,, because by being skin face side, can reduce the contact area with skin, so, the situation of the damp that is difficult to feel that body fluid causes is arranged.In addition, surface patch and the intermediate between the absorber that also can be used as absorbent commodity uses.Because reduce with the contact area of surface patch or absorber, so, there is the situation of returning of being difficult to from absorber.In addition, owing to reduce, have the buffering sense with the contact area of skin, so also can be used in the female parts etc. of the lateral plate of absorbent commodity, the outside of diaper (the outer back side), magic tape.In addition, can be used in many aspects such as the wiper that is used to remove attached to the rubbish on ground, the health, dirt, face shield, breast pad.
5 respectively constitute thing
Below, each is constituted thing be described in detail.
5.1 it is relevant with nonwoven fabric
5.1.1 fiber assembly
Fiber assembly is to be formed the roughly fiber assembly of sheet, is the fiber assembly that the fiber that constitutes this fiber assembly has the state of the free degree.In other words, be fiber assembly with fiber free degree each other.Here, the fiber free degree each other is meant the degree that formation can move freely by the fluid that mainly is made of gas as the fibroreticulate fiber of fiber assembly.This fiber assembly for example can mix the blended fiber of a plurality of fibers by ejection, and the fibrage that forms specific thickness forms.In addition, for example, can by a plurality of different fibers of ejection each, lamination forms fibrage and forms several times.
As fiber assembly of the present invention, for example can express the fiber web that forms by the comb and parallel cotton fibers prior to spinning method for example, perhaps by thermal welding, the fiber web before fiber thermal welding is each other solidified.In addition, can express the net that forms by the air-flow method for example, perhaps by thermal welding, the fiber web before fiber thermal welding is each other solidified.In addition, can express for example by putting the embossed thermal welding curing fiber web in the past of sticking method.In addition, can express the embossed fiber assembly in the past that spins, the fiber assembly before perhaps embossed thermal welding is solidified for example by spun-bond process.In addition, can express the fiber web of half interlacing that forms by needle point method for example.In addition, can express the fiber web of half interlacing that forms by the water acupuncture manipulation for example.In addition, can express the fiber assembly before fiber thermal welding is each other solidified for example by the meltblown spinning.In addition, can express for example by the solvent welding method form because solvent, fiber solidifies former fiber assembly each other.
In addition, by air (gas) stream, what the fiber assembly that fiber is arranged easily again was good is by using the formed fiber web of comb and parallel cotton fibers prior to spinning method of long fiber, having, can express fiber free degree height each other for example, only the thermal welding net in the past that forms by interlacing.In addition, in order to flow by a plurality of air (gas), behind the formation slot part (concavo-convex) etc., under the state that keeps its shape, make it nonwoven fabricization, good being to use by carrying out baker with predetermined heating device etc. handled (heat treated), makes the hot blast through transmission technique of the thermoplasticity fiber thermal welding that fiber assembly contains.
5.1.2 fiber
As the fiber that constitutes fiber assembly (for example, constitute the fiber 101 of fiber web 100 shown in Figure 1), for example can exemplify out the thermoplastic resin of low density polyethylene (LDPE), high density polyethylene (HDPE), straight chain shaped polyethylene, polypropylene, polyethylene terephthalate, modified polypropene, modification polyethylene terephthalate, nylon, polyamide etc., can exemplify out the independent or compound fiber of these each resins.
With the compound shape under the situation of fiber composite, for example can exemplify the fusing point of the knockout composition core sheath formula higher, the core shift formula of core sheath, the different block form of fusing point of left and right sides composition than sheath composition.In addition, also can be the compound shape of the abnormal shape of hollow type, flat, Y type, C type etc.In addition, also can be in constituting the fiber of fiber assembly, mix potentially to crispatura, show and cut apart fiber etc. what the three-dimensional crinkled fibre of crispaturaing, the load of physics by current, heat, embossing etc. were cut apart.
In addition, in order to form the three-dimensional shape of crispaturaing, can cooperate showing of regulation at crinkled fibre, potential crinkled fibre.Here, the three-dimensional shape of crispaturaing is meant the shape of helical form zigzag Ω shape etc., though fiber alignment main body ground towards in-plane, fiber alignment is also partly towards thickness direction.In view of the above, because the buckling strength of fiber itself is to the thickness direction effect, so, even applied external pressure, highly also be difficult to damage by pressure.Having, is under the situation of spiral helicine shape at fiber wherein again, because when having discharged external pressure, shape is wanted to restore, so, even, after external pressure discharges, also return to original thickness easily because superfluous external pressure is damaged by pressure highly a little.
Showing at crinkled fibre is to crispatura by machinery to pay shape, and the core sheath is configured to the general name of the fiber of being crispaturaed in advance with core shift formula, block form etc.Potential crinkled fibre is by heating, manifests the fiber of crispaturaing.
It is the fiber of continuous linearity at after the spinning that machinery is crispaturaed, can be by the peripheral speed differential thermal pressurization of linear velocity, and control is crispaturaed crispaturaing of manifesting, the number of crispaturaing of each unit length is many more, can improve with respect to the buckling strength of depressing outward more.For example, that the number of crispaturaing is good is 10 to 35/inch, is more preferably the scope of 15 to 30/inch.
The fiber of having been paid based on the shape of thermal contraction is made of the different plural resin of fusing point, if because heating, then because fusing point is poor, percent thermal shrinkage changes, so, be the situation of the three-dimensional fiber of crispaturaing.The compound shape of fibre section can exemplify the core shift formula of knockout sheath structure, the different block form of fusing point of left and right sides composition.The percent thermal shrinkage of such fiber for example can express 5 to 90% for example as good value, is more preferably 10 to 80% scope.
The assay method of percent thermal shrinkage is: the fiber that (1) makes mensuration is 100%, 200g/m 2Net, (2) make the sample of the size be cut into 250x250mm, (3) were placed on this sample in the baker of 145 ℃ (418.15k) 5 minutes, (4) measure the length dimension after shrinking, (5) can calculate from the length dimension difference before and after the thermal contraction.
Under the situation that this nonwoven fabric is used as surface patch, if consider the entering of liquid for example, skin sense of touch, then fiber number in 1.1 to 8.8dtex scope for well.
Under the situation that this nonwoven fabric is used as surface patch, as the fiber that constitutes fiber assembly, for example stay the such a spot of menses of skin, sweat etc., also can contain the liquid hydrophilic fibre of the cellulose family of slurry, chemical sizwe, artificial fibre, cellulose acetate, natural cotton etc. for absorption of residual.But, because cellulosic fibre is difficult to discharge once the liquid that absorbs, so, as good sample attitude, for example can express for example with respect to integral body, sneak into the situation of the scope of 0.1 to 5 quality %.
Under the situation that this nonwoven fabric is used as surface patch, for example consider entering, the back side rewetting of liquid, also can in above-mentioned hydrophobic synthetic fibre of giving an example, integrate hydrophilizing agent, water repellent etc., perhaps carry out coating etc.In addition, also can pass through corona treatment, plasma treatment, pay hydrophily.In addition, also can contain the WATER REPELLENCY fiber.Here, the WATER REPELLENCY fiber is meant and has carried out the known fiber of refusing water treatment.
In addition,, also for example can contain the inorganic filler of titanium oxide, barium sulfate, calcium carbonate etc. in order to improve brightening property.Under the situation of composite fibre that is core sheath formula, can only be contained in the core, can also be contained in the sheath.
In addition, such as shown previously, pass through air flow, what fiber was arranged easily again is the fiber web that forms by the comb and parallel cotton fibers prior to spinning method of using long fiber, for by a plurality of air flows, form slot part (concavo-convexization) etc. after, under the state that keeps its shape, make it nonwoven fabricization, good is to handle (heat treated) by baker, makes the hot blast through transmission technique of thermoplasticity fiber thermal welding.As the fiber that is fit to this method for making, in order to make fiber intersection point thermal welding each other, good core sheath structure, the fiber of structure side by side of being to use, be more preferably by sheath each other easily the fiber of the core sheath of thermal welding effectively structure constitute.The particularly good core sheath composite fibre that is to use the core sheath composite fibre that constitutes by polyethylene terephthalate and polyethylene, constitutes by polypropylene and polyethylene.These fibers can use separately or with two or more the combination.In addition, it is 20 to 100mm that fiber is grown good, and good especially is 35 to 65mm.
5.2 it is relevant with non-woven cloth manufacturing device
5.2.1 the main fluid that constitutes by gas
The fluid that mainly is made of gas of the present invention for example can be expressed gas that is adjusted to normal temperature or set point of temperature or the atomic aerosol that contains solid or liquid in this gas for example.
As gas, for example can express air, nitrogen etc. for example.In addition, gas also comprises the steam of the liquid of steam etc.
Aerosol is the material that is dispersed with liquid or solid in the gas, enumerates example below.For example, can express for example and be dispersed with the softener that is used for painted China ink, is used to improve the silicon etc. of flexibility, be used to prevent the activating agent of the hydrophily of charged and control wettability or WATER REPELLENCY, the titanium oxide that is used to improve the energy of fluid, barium sulfate etc. inorganic filler, be used to improve the energy of fluid, simultaneously in heat treated, be used to improve the aerosol of the powder binder of the polyethylene etc. of concave-convex shaping maintenance, the antihistaminic that is used for antipruritic bagodryl hydrochloride, isopropyl methyl phenol etc., humectant, bactericide etc.Here, solid comprises gelatinous material.
Mainly the temperature of the fluid that is made of gas can be adjusted rightly.Can adjust rightly according to the shape of the character of the fiber that constitutes fiber assembly, nonwoven fabric that desire is made.
Here, for example for the fiber that constitutes fiber assembly is moved validly, because still the temperature of the fluid that mainly is made of gas can increase the free degree of the fiber that constitutes fiber assembly for high temperature to a certain degree, so good.In addition, in fiber assembly, contain under the situation of thermoplasticity fiber, the temperature that can soften for this thermoplasticity fiber by the temperature of the fluid that mainly constitutes by gas, can constitute, make the thermoplasticity fiber softening or the fusion in the zone etc. of the fluid that is configured in injected mainly to constitute by gas, simultaneously, can make it to harden once again.
In view of the above, for example, keep the shape of nonwoven fabric by spraying the fluid that mainly constitutes by gas.In addition, for example, when having been paid the mobile member that is prescribed at fiber assembly and having been moved, the intensity of the degree that this fiber assembly (nonwoven fabric) can not scatter.
Mainly the flow of the fluid that is made of gas can be adjusted rightly.The concrete example that has the fiber assembly of the free degree as fiber each other, for example, the fiber web 100 that can express for example is, by sheath is high density polyethylene (HDPE), core is that polyethylene terephthalate constitutes, fiber length is 20 to 100mm, and good is 35 to 65mm, and fiber number is 1.1 to 8.8dtex, good is, and 2.2 to 5.6dtex core sheath fiber is a main body, if use the comb and parallel cotton fibers prior to spinning method to open fibre, then fiber length is 20 to 100mm, and good is 35 to 65mm, if the air-flow method is opened fibre, then fiber length is 1 to 50mm, and good is 3 to 20mm fiber is according to 10 to 1000g/m 2, good is 15 to 100g/m 2Adjust.As the condition of the fluid that mainly constitutes by gas, for example can express for example that (ejiction opening 913: diameter is 0.1 to 30mm, and good is 0.3 to 10mm in the ejection portion 910 that has formed Fig. 8 or a plurality of ejiction openings 913 shown in Figure 9; Spacing is 0.5 to 20mm, and good is 3 to 10mm; Be shaped as just circle, ellipse or rectangle) in, with air quantity is 3 to 50L/ (branch hole), 5 to 20L/ (branch hole) condition that good is is 15 to 300 ℃ (288.15K is to 573.15K) to fiber web 100 injection temperations, and good is the situation of the hot blast of 100 to 200 ℃ (373.15K is to 473.15K).For example, spraying with above-mentioned condition under the situation of the fluid that mainly is made of gas, its position of the fiber of formation, is one of suitable example of fiber assembly of the present invention towards the fiber assembly that can change.By with such fiber, creating conditions makes, and can form for example nonwoven fabric shown in Fig. 2,3.The size of slot part 1, convex shaped part 2, fiber weight per unit area can obtain in following ranges.In slot part 1, thickness is 0.05 to 10mm, 0.1 to 5mm scope that good is, and width is 0.1 to 30mm, 0.5 to 5mm scope that good is, the fiber weight per unit area is 2 to 900g/m 2, good is 10 to 90g/m 2Scope.In convex shaped part 2, thickness is 0.1 to 15mm, 0.5 to 10mm scope that good is, and width is 0.5 to 30mm, 1.0 to 10mm scope that good is, the fiber weight per unit area is 5 to 1000g/m 2, good is 10 to 100g/m 2Scope.In addition, though can make nonwoven fabric, be not limited to this scope in above-mentioned number range roughly.
5.2.2 aeration support component
As the aeration support component, can express a side that supports fiber web 100 for example and be general plane shape or curved surface shape roughly, simultaneously, the support component that general plane shape or roughly curved surface are general planar.As general plane shape or curved surface shape roughly, for example, can express tabular, cylindric for example.In addition, the general planar shape for example is meant that the face of the mounting fiber web 100 of support component itself does not form the situation of concavo-convex grade.Specifically, the net that can express mesh-supported parts 210 for example is not formed the support component of concavo-convex grade.
As this aeration support component, for example can express tabular support component, support component cylindraceous for example.Specifically, can express above-mentioned mesh-supported parts 210, support component 220 for example.
Here, aeration support component 200 can be configured on the non-woven cloth manufacturing device 90 removably.In view of the above, can dispose rightly and the corresponding aeration support component 200 of desirable nonwoven fabric.In other words, in non-woven cloth manufacturing device 90, aeration support component 200 can exchange with other the aeration support component of selecting from different a plurality of aeration support components.
Mesh portion to mesh-supported parts 210 shown in Figure 4 or support component 220 shown in Figure 16 is described as follows.Mesh portion as this aeration, for example can express the silk of using based on the resin of polyester polyphenylene sulfide nylon conductive monofilaments etc. for example, perhaps based on the silk of the metal of stainless steel copper aluminium etc. etc., the aeration net that inweaves with flat fabric TWILL CLOTH SATIN AND SATEEN CLOTH two-layer fabric spiral fabrics etc.
Here, the venting quality of this aeration net for example can partly change venting quality by rugosity, the filament shape that partly changes the method that inweaves, silk.Specifically, can express for example aeration sieve aperture based on the spiral fabrics of polyester, based on aeration sieve aperture based on the spiral fabrics of the flat shape silk of stainless steel and circular wire.
5.2.3 injection member
The fluid that ejection portion 910 owing to can change mainly is made of gas towards, therefore for example can adjust the interval of formed concavo-convex recess (slot part), the height of convex shaped part etc. rightly.In addition, for example since be can automatically change above-mentioned fluid towards formation, therefore, for example can make slot part etc. become snakelike shape (wavy, zigzag), other shape rightly.In addition, by adjusting mainly spray volume, the ejection time of the fluid that constitutes by gas, can adjust rightly slot part, peristome shape, form pattern.Mainly the fluid that is made of gas can be vertical with respect to the spray angle of fiber web 100, in addition, also can in the moving direction F of fiber web 100, move direction only towards predetermined angular to linear flow as this moving direction F, perhaps to opposite, only towards predetermined angular with the moving direction of linear flow.

Claims (16)

1. nonwoven fabric, be have first direction and with the nonwoven fabric of the second direction of above-mentioned first direction quadrature, it is characterized in that having:
A plurality of first areas,
A plurality of second areas that each both sides form along above-mentioned a plurality of first areas,
And a plurality of the 3rd zones, described a plurality of the 3rd zones above-mentioned a plurality of second areas each with each relative side of above-mentioned a plurality of first areas, be formed on adjacent above-mentioned a plurality of second areas between each,
Each is compared with above-mentioned a plurality of the 3rd zones, each containing ratio height of above-mentioned a plurality of first areas at the fiber of above-mentioned second direction orientation,
Each compares each containing ratio height at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of second areas with above-mentioned a plurality of the 3rd zones.
2. nonwoven fabric as claimed in claim 1 is characterized in that, each the containing ratio at the fiber of above-mentioned first direction orientation of above-mentioned a plurality of the 3rd zones is 40% to 80%,
Above-mentioned a plurality of first area each at the containing ratio of the fiber of above-mentioned first direction orientation below 45%, and lower more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation,
Above-mentioned a plurality of second area each at the containing ratio of the fiber of above-mentioned first direction orientation more than 55%, and higher more than 10% than each containing ratio of above-mentioned a plurality of the 3rd zones at the fiber of above-mentioned first direction orientation.
3. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, above-mentioned a plurality of first areas each at the containing ratio of the fiber of above-mentioned second direction orientation more than 55%.
4. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, each fiber weight per unit area of above-mentioned a plurality of first areas is 3 to 150g/m 2,
Each fiber weight per unit area of above-mentioned a plurality of second area is 20 to 280g/m 2,
Above-mentioned a plurality of the 3rd each fiber weight per unit area of zone is 15 to 250g/m 2
5. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, each fibre density of above-mentioned a plurality of first areas is at 0.18g/cm 3Below,
Each fibre density of above-mentioned a plurality of second area is at 0.40g/cm 3Below,
Above-mentioned a plurality of the 3rd each fibre density of zone is at 0.20g/cm 3Below.
6. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, above-mentioned a plurality of first areas, above-mentioned a plurality of second areas and above-mentioned a plurality of the 3rd zone are roughly even at the height of separately thickness direction.
7. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, is formed with a plurality of slot parts at this nonwoven fabric,
With a plurality of convex shaped parts to form with each adjacent mode of above-mentioned a plurality of slot parts,
Above-mentioned a plurality of first area each constitute above-mentioned a plurality of slot part each,
Each is formed in the sidepiece of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of second area,
Each is formed in the central portion of above-mentioned a plurality of convex shaped parts above-mentioned a plurality of the 3rd zone.
8. nonwoven fabric as claimed in claim 7 is characterized in that, at the height of the thickness direction of this nonwoven fabric of above-mentioned slot part below 90% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part,
At the above-mentioned height of the above-mentioned sidepiece of above-mentioned convex shaped part below 95% of above-mentioned height at the above-mentioned central portion of above-mentioned convex shaped part.
9. nonwoven fabric as claimed in claim 7 is characterized in that, above-mentioned a plurality of slot parts each the fiber weight per unit area with respect at each average fiber weight per unit area of above-mentioned a plurality of convex shaped parts below 90%.
10. nonwoven fabric as claimed in claim 8 is characterized in that, and is different mutually across each above-mentioned height of each adjacent above-mentioned a plurality of convex shaped parts of above-mentioned a plurality of slot parts.
11. nonwoven fabric as claimed in claim 7 is characterized in that, is flat at each top of above-mentioned a plurality of convex shaped parts.
12. nonwoven fabric as claimed in claim 7 is characterized in that, on the face of the opposite sides of face that form with above-mentioned a plurality of slot parts and above-mentioned a plurality of convex shaped part of this nonwoven fabric, form to the outstanding a plurality of zones of the projected direction opposition side of above-mentioned convex shaped part.
13. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, forms a plurality of peristomes on each in above-mentioned a plurality of first areas.
14. nonwoven fabric as claimed in claim 13 is characterized in that, at each the fiber of periphery of above-mentioned a plurality of peristomes with along each the mode orientation of periphery of above-mentioned a plurality of peristomes.
15. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, this nonwoven fabric mixes the fiber of WATER REPELLENCY.
16. nonwoven fabric as claimed in claim 1 or 2 is characterized in that, has flexuosity at above-mentioned first direction.
CN2007800172364A 2006-06-23 2007-05-23 Non-woven fabric Expired - Fee Related CN101542032B (en)

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CN2007800172364A Expired - Fee Related CN101542032B (en) 2006-06-23 2007-05-23 Non-woven fabric
CN2007800182563A Active CN101448991B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800182366A Active CN101448990B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800172186A Active CN101443501B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800167614A Active CN101443499B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800173348A Expired - Fee Related CN101443502B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800172082A Expired - Fee Related CN101443500B (en) 2006-06-23 2007-06-06 Multilayer nonwoven fabric and process for producing the same
CN2007800183424A Expired - Fee Related CN101448992B (en) 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article
CN2007800182686A Active CN101448989B (en) 2006-06-23 2007-06-08 Nonwoven fabric
CN2007800227846A Active CN101473081B (en) 2006-06-23 2007-06-22 Absorptive article

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CN2007800182563A Active CN101448991B (en) 2006-06-23 2007-05-23 Nonwoven fabric
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CN2007800172186A Active CN101443501B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800167614A Active CN101443499B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800173348A Expired - Fee Related CN101443502B (en) 2006-06-23 2007-05-23 Nonwoven fabric
CN2007800172082A Expired - Fee Related CN101443500B (en) 2006-06-23 2007-06-06 Multilayer nonwoven fabric and process for producing the same
CN2007800183424A Expired - Fee Related CN101448992B (en) 2006-06-23 2007-06-06 Absorbent, multilayered absorbent, and absorbent article
CN2007800182686A Active CN101448989B (en) 2006-06-23 2007-06-08 Nonwoven fabric
CN2007800227846A Active CN101473081B (en) 2006-06-23 2007-06-22 Absorptive article

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