WO2011118725A1

WO2011118725A1 - Body fluid treatment article and method for manufacturing same

Info

Publication number: WO2011118725A1
Application number: PCT/JP2011/057232
Authority: WO
Inventors: 俊幸谷尾; 規世子西村
Original assignee: ユニ・チャーム株式会社
Priority date: 2010-03-24
Filing date: 2011-03-24
Publication date: 2011-09-29
Also published as: CN102821723A; MY161444A; JP5665338B2; JP2011200337A

Abstract

Disclosed is: a body fluid treatment article wherein twisting while being worn can be inhibited; and a method for manufacturing the same. The panty liner (1) comprises: inner and outer surface sheets (2, 3); a fluid-absorption interlining (4) located between the inner and outer surface sheets (2, 3); and a leakproof sheet (5) with which the outer surface sheet (3) is covered. A fiber nonwoven fabric containing thermoplastic synthetic resin is used as the inner and outer surface sheets (2, 3), and fluff pulp is used as the interlining (4). On the inner surface sheet (2) are formed a plurality of compressed grooves (7) toward the outer surface sheet (3) in a manner that the compressed grooves (7) form a grid pattern by extending so as to cross one another respectively in the lengthwise direction (Y) and the crosswise direction (X). The compressed grooves (7) comprise a first portion formed from the inner surface sheet (2) toward the interlining (4) and second portions each provided with a bottom and formed from the lower part of the first portion toward the outer surface sheet (3) in such a manner that the interval between both of the lateral sides is reduced gradually. At the bottoms of the second portions, at least parts of the fibers forming the inner surface sheet (2) and the fibers forming the outer surface sheet (3) are in contact with each other and welded.

Description

Body fluid treatment article and method for producing the same

The present invention relates to a body fluid treatment product such as a sanitary napkin, a urine absorption pad, and a panty liner, and more particularly to a body fluid treatment product in which a plurality of recesses are formed in the thickness direction from the surface thereof, and a manufacturing method thereof.

Conventionally, a bodily fluid treatment product such as a sanitary napkin in which a plurality of grooves are formed is known. For example, according to Patent Document 1, the body fluid treatment article includes a top sheet, a back sheet, an absorbent body sandwiched between the front and back sheets, and a plurality of grooves formed by compression from the top sheet to the absorbent body. And have. A hot melt adhesive is applied between the top sheet and the absorber.

In the body fluid treatment product as described above, a groove is formed by an embossing roll. That is, a plurality of grooves are formed by passing a body fluid treatment article between an embossing roll having a convex portion and a backup roll facing the embossing roll. In such a groove, the hot melt adhesive is melted, and the top sheet and the absorber are joined. By bonding the top sheet and the absorber, the adhesion between them can be improved, and the liquid on the top sheet can be transferred to the absorber side more efficiently.

Japanese Patent Application No. 2005-218648 (JP 2005-218648 A)

According to Patent Document 1 as described above, the core of the absorber is interposed between the bottom of the groove and the back sheet without the plurality of grooves reaching the back sheet. In such a body fluid treatment article, since the core material can move in the vertical direction and the horizontal direction, the core material may move in the worn state, and the absorbent body may be twisted.

This invention makes it a subject to provide the bodily fluid treatment article which can suppress the shaking in a wearing condition, and its manufacturing method.

The present invention has first and second inventions.
1st invention has a vertical direction and a horizontal direction, The body side and its opposite side, The liquid-permeable inner surface sheet located in the said body side, The outer surface sheet located in the said opposite side, and these sheets It is related with improvement of the bodily fluid treatment goods which include a liquid-absorbing core material located in between and in which a plurality of compressed grooves are formed in the inner surface sheet.
The liquid-absorbent core material is not entangled, welded or fused to each other by a special means, and is not covered with another sheet or the like.

1st invention is the said bodily fluid treatment article, The said inner surface sheet and the said outer surface sheet are formed with a fiber nonwoven fabric, and the said pressing groove is formed over the whole area of the said vertical direction and the said horizontal direction of the said inner surface sheet. A first portion formed from the inner surface sheet toward the outer surface sheet, and a second portion formed so as to be continuous with the first portion from the first portion toward the outer sheet. In the second portion, at least a part of the fibers of the inner sheet and the fibers of the outer sheet are welded to each other.

As one embodiment of the present invention, the inner sheet and the outer sheet are formed of a fiber nonwoven fabric containing a thermoplastic synthetic resin.

As one embodiment of the present invention, a plurality of the second portions are intermittently arranged in at least one of the vertical direction and the horizontal direction in the compressed groove.

As one embodiment of the present invention, the compressed groove has a virtual vertical center line that bisects the horizontal length dimension and a virtual horizontal center line that bisects the vertical length direction. Tilt.

As one embodiment of the present invention, the compressed groove further has a recess that overlaps at least a part of the first portion.

As another embodiment, the core material has a mass per unit area of 70 to 350 g / m ² .

As another embodiment, the compressed groove is 10 to 30% of the area of the inner sheet.

As another embodiment, the inner sheet includes short fibers.

According to a second aspect of the present invention, there is provided a plurality of pressings on a laminated web including first and second webs formed by a fiber nonwoven fabric containing a thermoplastic synthetic resin, and a liquid-absorbent core material disposed between the webs. It is related to the improvement of the manufacturing method to form the groove.

According to a second aspect of the present invention, in the manufacturing method, the first and second webs and the core material are formed by a step of laminating the core material and the second web on the first web and a groove forming unit. The step of compressing the laminated web and forming the compressed groove, the step of joining the first and second webs together around the core material by the sealing means, and the cutting means, Cutting the first and second webs around the seal portion, and the groove forming means includes an embossing roll formed with a first convex portion and a second convex portion protruding from the first convex portion. And a backup roll having a smooth surface opposite thereto, the laminated web being pressurized and heated by the embossing roll and the backup roll, and the second convex part At least a portion of the corresponding fibers of the first and second webs in position is characterized in that it is thermally welded.
The liquid-absorbent core material is not entangled, welded or fused to each other by a special means before the step of forming the compressed groove by the groove forming means, and other sheets, etc. It is not covered with. Furthermore, the core material is not subjected to special treatment such as pressing before the step of forming the compressed groove by the groove forming means.

Part of the fibers of the inner and outer surface sheets forming the body fluid treatment article are welded together in the second portion. Therefore, the movement of the liquid-absorbent core material positioned between the inner and outer surface sheets is restricted, and the bodily fluid treatment article can be prevented from being swung.

The top view of the panty liner which is an example of the bodily fluid treatment goods of 1st Embodiment. (A) The expansion schematic of the area | region shown by II of FIG. FIG. 2B is a schematic cross-sectional view taken along the line IIB-IIB in FIG. (C) The expansion outline figure of the field shown by IIC of Drawing 2 (b). Explanatory drawing for demonstrating the manufacturing method of a bodily fluid treatment article. Embossing roll pattern diagram. (A) The elements on larger scale of the area | region shown by V of FIG. FIG. 5B is a cross-sectional view taken along the line VB-VB in FIG. The top view of the panty liner of other embodiment. The top view of the panty liner of other embodiment.

An example of the body fluid treatment product of the present invention will be described using a panty liner 1. FIG. 1 is a plan view of the panty liner 1, FIG. 2A is an enlarged view of a region indicated by II in FIG. 1, and shows an outline thereof, and FIG. 2B is a diagram of FIG. FIG. 2C is a cross-sectional view taken along the line IIB-IIB, and FIG. 2C is an enlarged view of the region indicated by IIC in FIG. The pantiliner 1 includes a longitudinal direction Y and a transverse direction X, a virtual longitudinal center line PP that bisects the length dimension in the transverse direction X, and a virtual transverse center that bisects the longitudinal dimension in the longitudinal direction Y. It has a line QQ, and is substantially symmetrical with respect to the virtual vertical center line PP and the virtual horizontal center line QQ.

The panty liner 1 includes an inner sheet 2 positioned on the wearer's body side, an outer sheet 3 positioned on the opposite side of the clothing, and a liquid-absorbent core positioned between the inner and

outer sheets

2 and 3. A material 4 and a leakage prevention sheet 5 covering the outer sheet 3 are included. The inner surface sheet 2, the outer surface sheet 3, and the leakage prevention sheet 5 have substantially the same shape and size, and the core member 4 is slightly smaller than them. Between the inner sheet 2 and the core material 4, between the core material 4 and the outer sheet 3, and between the outer sheet 3 and the leakage prevention sheet 5, a hot melt adhesive (not shown) is appropriately patterned, for example, stripes. It is applied in a pattern such as a grid, parallel lines, and dots. In the case of stripes, lattices, and parallel lines, pattern elements such as zigzag and spiral may be used.

The inner sheet 2 is a fiber nonwoven fabric that has liquid permeability and includes a thermoplastic synthetic resin, and an air-through fiber nonwoven fabric, a point bond fiber nonwoven fabric, a spun bond fiber nonwoven fabric, or the like can be used. As the thermoplastic synthetic resin, polyethylene, polypropylene, a composite thereof, polyethylene terephthalate (PET), or the like can be used. The inner sheet 2 has a mass per unit area of about 15 to 60 g / m ² , preferably about 18 to 45 g / m ² , and a thickness of about 0.15 to 0.60 mm.

The outer surface sheet 3 is a fiber nonwoven fabric containing a thermoplastic synthetic resin, and can use a spunbond / meltblown / spunbond (SMS) fiber nonwoven fabric, an air-through fiber nonwoven fabric, a point bond fiber nonwoven fabric, a spunbond fiber nonwoven fabric, and the like. The mass per unit area can be about 15-60 g / m ² , preferably about 18-45 g / m ² . As the thermoplastic synthetic resin, for example, polypropylene can be used, but preferably the same kind as the synthetic resin used for the inner sheet 2. The outer sheet 3 may be liquid permeable or liquid impermeable.

The core material 4 uses fluff pulp having a mass per unit area of about 70 to 350 g / m ² , preferably about 80 to 200 g / m ² , and in this embodiment about 150 g / m ² . As the core material 4, it is desirable to use pulp fibers having an average fiber length of about 0.5 to 3.0 mm, and synthetic pulp fibers can be used in addition to natural pulp fibers. Moreover, absorbent materials such as superabsorbent polymer particles can be mixed with these pulps. Furthermore, an appropriate amount of a thermoplastic synthetic fiber (staple fiber), for example, 5 to 25% by mass can also be used for shape retention, promotion of capillary action, and the like. In this case, the average fiber length of the thermoplastic synthetic fiber is preferably longer than the average fiber length of the pulp fiber and about 50 mm or less. The core material 4 as described above is laminated without being entangled, welded, or fused by special means, and is not covered with other sheets or the like. .

As the leakage preventing sheet 5, a non-breathable polyethylene film having a mass per unit area of about 21 g / m ² is used. This leakage prevention sheet 5 is for preventing leakage of bodily fluid absorbed by the core material 4, for example, a moisture-permeable plastic film having a mass per unit area of about 30 to 60 g / m ² or a unit area. A spunbond / meltblown / spunbond (SMS) non-woven fabric having a weight per unit of about 25 to 50 g / m ² can also be used.

Around the core material 4, a seal portion 6 is formed along the outer periphery of the inner surface sheet 2, and the inner surface sheet 2, the outer surface sheet 3, and the leakage prevention sheet 5 are joined to each other. The seal portion 6 is formed by thermally welding the inner surface sheet 2, the outer surface sheet 3, and the leakage prevention sheet 5, and the bonding strength thereof by a hot melt adhesive (not shown) positioned between the sheets. Has been strengthened.

The inner sheet 2 is formed with a plurality of compressed grooves 7 toward the outer sheet 3. The compressed groove 7 extends so as to intersect the vertical direction Y and the horizontal direction X, respectively, and forms a lattice pattern. As shown in FIGS. 2 (a) and 2 (b), the compressed groove 7 includes a first portion 8 formed from the inner surface sheet 2 toward the core member 4 and a lower portion 8 a of the first portion 8 to the outer surface sheet 3. The bottomed second portion 9 is formed so that the distance between the side surfaces gradually decreases toward the bottom. The length dimension t1 in the thickness direction of the portion where the first and

second portions

8 and 9 are not formed is about 1.4 to 1.6 mm, from the lower portion 8a of the first portion 8 to the outer sheet 3. , That is, the depth dimension t2 of the second portion 9 is about 0.55 to 0.70 mm, and the length dimension from the bottom surface 9a of the second portion 9 to the outer sheet 3, ie, the depth dimension t3 is about 0. 0.09 to 0.15 mm. The dimension t3 is about 1/10 of the dimension t1. These dimensions were obtained by impregnating the panty liner 1 with liquid nitrogen, freezing, cutting with a razor, and measuring each thickness on the cut surface with an electron microscope (VE7800, manufactured by Keyence Corporation). The measurement was performed after the frozen sample was returned to room temperature and thawed.

In the bottom portion 9a of the second portion 9, a protruding portion 9b is formed in the length and width direction of the compressed groove 7. The raised portion 9 b has a lower compression density such as fluff pulp fiber than the bottom portion 9 a, and can suppress body fluid from flowing too much along the compressed groove 7. As illustrated in FIG. 2C, at the bottom 9a of the second portion 9, at least a part of the fibers forming the inner surface sheet 2 and the fibers forming the outer surface sheet 3 are in contact with each other, and these are welded. A welded portion W is formed. In the portion where the second portion 9 is formed, the inner and

outer surface sheets

2 and 3 are joined by the welded portion W, so that the movement of the core material 4 is hindered, and the core material becomes the outer surface sheet when the panty liner 1 is worn. 3 can be prevented from moving and twisting. Since the dimension t3 is zero at the portion where the inner and

outer surface sheets

2 and 3 are welded to each other, the above-described value is an average value of the dimensions of the welded portion and the non-welded portion. Further, when the core material 4 includes thermoplastic synthetic fibers, these fibers are welded to each other to form a mesh, and thus the movement of the core material 4 such as fluff pulp is further regulated.

In the portion where the compressed groove 7 is formed as described above, the core material 4 is compressed and the density is higher than the periphery where the compressed groove 7 is not formed. Therefore, the bodily fluid excreted by the inner surface sheet 2 can easily flow into the compressed groove 7 having a high density of the core material 4, and can quickly transfer the bodily fluid to the bottom surface side of the core material 4.
Further, in the portion where the second portion 9 is formed, the core material 4 is pushed away to the periphery thereof, and the density of the core material 4 is further increased around the second portion 9. Therefore, the body fluid is quickly absorbed into the core material 4. That is, the body fluid of the inner surface sheet 2 flows in a concentrated manner in the compressed groove 7 and diffuses around the second portion 9. Therefore, the body fluid is promptly moved away from the body, and is held at the distance.

In the second portion 9, a part of the inner sheet 2 and the outer sheet 3 are welded to each other, but a small amount of core material is located between the

sheets

2 and 3 except for the welded portion W. ing. Accordingly, the body fluid can be absorbed also at the bottom surface 9a of the second portion 9, and further the body fluid can be diffused to the core material in the surrounding area, so that the body fluid is prevented from staying in the second portion 9. can do. In particular, when the core material 4 includes a hydrophobic fiber, the capillary action is promoted, and the body fluid can be diffused along the fiber without blocking the body fluid flow at the bottom surface 9a. Furthermore, when these fibers are located over the adjacent bottom portions 9a, diffusion of body fluid can be further promoted.

The compressed grooves 7 formed by the first and

second portions

8 and 9 are formed in a lattice pattern so as to intersect the virtual vertical center line PP and the virtual horizontal center line QQ, respectively. Yes. That is, it is not parallel to the virtual vertical center line PP and the virtual horizontal center line QQ. When the panty liner 1 is worn, both sides in the lateral direction X are pressed inward by the buttocks so that if the compressed groove 7 is formed parallel to the virtual vertical center line PP, the panty liner 1 It is easy to bend along the compressed groove 7 and a gap may be formed between the skin of the wearer. Further, when the compressed groove 7 is formed in parallel to the virtual lateral center line QQ, the rigidity increases with respect to the pressing of the heel as described above, which may give an uncomfortable feeling. However, in the panty liner 1 of this embodiment, the wearer can be in close contact with the wearer by making it not parallel to the virtual vertical center line PP and the virtual horizontal center line QQ, and the wear feeling can be improved. Can do.

The compressed groove 7 is preferably formed in substantially the entire area in the longitudinal direction Y and the lateral direction X of the inner sheet 2 and is approximately 10 to 30% of the area of the inner sheet 2. If it is smaller than about 10%, the core material 14 is not sufficiently fixed, and if it is larger than about 30%, the rigidity may increase and the product may become hard. The second portion 9 is preferably about 10 to 70% of the area of the compressed groove 7. When it is smaller than about 10%, the adhesive strength of the inner and

outer surface sheets

2 and 3 is insufficient, and when it is larger than about 70%, the inner and

outer surface sheets

2 and 3 are easily broken.
The second portion 9 is formed intermittently in the compressed groove 7. By forming intermittently in this way, the inner and

outer surface sheets

2 and 3 can be prevented from breaking. Furthermore, a plurality of second portions 9 are formed side by side in the lateral direction X in the compressed groove 7, or a plurality of second portions 9 are formed side by side in the vertical direction Y, so that the inner and

outer surface sheets

2 and 3 are partly strongly joined. The

sheet

2 and 3 can be further prevented from being broken.

It should be noted that temporary attachment means for temporarily attaching the panty liner 1 to the wearer's underwear or the like may be formed on the clothing side of the leakage prevention sheet 5, and this may be covered with a covering sheet. As the temporary fixing means, a hot melt adhesive or the like can be used, and a plastic film or the like can be used as the covering sheet.

FIG. 3 illustrates an outline of the manufacturing apparatus 10 for the panty liner 1 as described above. In these manufacturing apparatuses 10, the panty liner 1 can be manufactured through the first to fifth steps. In the first step, the core material 14 forming the core material 4 of the panty liner 1 is laminated on the inner surface web 12 forming the inner sheet 2 of the panty liner 1 at a constant interval in the machine direction MD, and the machine is driven by the conveying roller 16. The outer web 13 forming the outer sheet 3 of the panty liner 1 conveyed in the direction MD is laminated. The core material 14 is laminated by a lamination means (not shown) without being entangled, welded or fused to each other by a special means, and is not covered with another sheet or the like. . A hot melt adhesive (not shown) is applied between the inner surface web 12, the core material 14, and the outer surface web 13.

In the second step, the compressed groove 7 is formed by the groove forming means 17 in the laminate of the inner and

outer webs

12 and 13 and the core material 14. The groove forming means 17 includes an embossing roll 20 and a backup roll 21 that faces the embossing roll 20 and has a smooth surface. The embossing roll 20 and the backup roll 21 are heated to about 80 to 140 ° C., preferably about 90 to 130 ° C. with a heater (not shown). In this embodiment, it is heated to about 115-120 ° C. Between the embossing roll 20 and the backup roll 21, a laminated body of the inner and

outer surface webs

12 and 13 in which the core member 14 is sandwiched is passed. These laminates are pressed by the embossing roll 20 and the backup roll 21 at a pressure of about 0.10 to 0.5 MPa, preferably about 0.15 to 0.40 MPa, and in this embodiment about 0.25 MPa. . The pressure is a pressure value for one roll shaft having a width of 175 mm.

4 is a diagram illustrating the pattern of the embossing roll 20, FIG. 5A is an enlarged view of a region indicated by V of the embossing roll 20 in FIG. 4, and FIG. It is the VB-VB sectional view taken on the line (a). A plurality of ridges 40 are formed on the surface 20 a of the embossing roll 20. A plurality of the ridges 40 are formed on the entire surface 20a of the embossing roll 20 so as to be spaced apart from each other in the machine direction MD and the intersecting direction CD intersecting therewith, and form a lattice pattern as a whole. The protrusion 40 has a first protrusion 18 that protrudes from the surface 20 a of the embossing roll 20 and a second protrusion 19 that protrudes further from the first protrusion 18.

The first convex portion 18 has a rectangular shape with a side of about 1.0 mm, and the second convex portion 19 has a rectangular shape with a side of about 0.5 mm. The first convex portion 18 and the second convex portion 19 are formed so that their centers coincide with each other, and are continuous by the inclined surface 22. With such an embossing roll 20 and a backup roll 21, the laminated body of the inner and

outer surface webs

12 and 13 and the core member 14 has first and

second portions

8 and 18 corresponding to the first and second

convex portions

18 and 19. 9 is formed.

The first convex portion 18 and the second convex portion 19 are formed on the entire embossing roll 20, but the inner and

outer surface webs

12 and 13 conveyed between the embossing roll 20 and the backup roll 21 have a core material. 14 is sandwiched, and the portion where the core material 14 is located is thick, so only the portion where the core material 14 is located is heated and pressurized. In the 1st convex part 18, the inner surface web 12 is heat-melted, it welds with the adjacent core material 14, and the hot-melt-adhesive agent in between is also fuse | melted, and joins the inner surface web 12 and the core material 14 more firmly. . Since the area of the second convex portion 19 is small and the inclined surface 22 is formed between the second convex portion 19 and the inner surface web 12 and the outer surface web, the core material 14 is pushed away to the periphery. 13 contact, and these are heated and pressurized. In the second convex portion 19, not all of the core material 14 is pushed away, but a gap is formed between the core materials 14 by pushing away at least a part thereof, and the inner surface web 12 and the outer surface web 13 are formed in the gap. Can be made contactable. In particular, the core member 14 has a mass per unit area of about 80 to 200 g / m ² and is relatively sparse, so it can be easily pushed away by the second convex portion 19. In addition, when the mass per unit area of the core material 14 is smaller than about 80 g / m ² , it is difficult to be uniform during mass production, and when it is larger than about 200 g / m ² , This is because it becomes difficult to push away the core material 14.

As shown in FIG. 3, in the third step, the leakage prevention web 15 forming the leakage prevention sheet 5 is conveyed by the conveyance roll 16 and joined to the outer surface web 13. The leakage prevention web 15 is supplied to the surface of the outer surface web 13 opposite to the core 14 lamination surface. A hot melt adhesive (not shown) is applied to the leakage preventing web 15 so that the leakage preventing web 15 can be joined to the outer surface web 13.

In the fourth step, the inner web 12, the outer web 13 and the leakage prevention web 15 are joined to each other by the sealing means 23 to form the seal portion 6 of the panty liner 1. The seal means 23 includes a seal roll 25 having a protrusion 24 and a backup roll 26 facing the seal roll 25. Both rolls 25 and 26 are heated to about 80 to 140 ° C. by a heater (not shown). The protrusions 24 are formed so as to correspond to the periphery of the core member 14, and the inner surface web 12, the outer surface web 13, and the leakage prevention web 15 are heated and pressed together to form the seal portion 6.

In the fifth step, the laminated web of the inner surface web 12, the core material 14, the outer surface web 13, and the leakage preventing web 15 is cut around the seal portion 6 by the cutting means 27. The cutting means 27 has a cutter roll 29 in which a blade 28 is formed and a backup roll 30 opposite to the cutter roll 29, and by cutting the laminated web between the

rolls

29, 30, the cutting web 27 is cut. The panty liner 1 shown in FIG. 1 can be obtained.

In the manufacturing method as described above, the core material 14 is not covered with a covering sheet such as tissue paper. Therefore, compared with the case where it coat | covers, the core material 14 is easy to push away to the circumference | surroundings by the 2nd convex part 19 of an embossing roll. Further, since the core material 14 is not entangled, welded, or fused to each other by a special means before the compressed groove 7 is formed by the groove forming means 17, the second convex portion is further increased. 19 is easily pushed away. Furthermore, by not covering the core material 14 with the covering sheet, the fibers of the inner and

outer surface webs

12 and 13 can easily come into contact with each other through the gap between the core material 14, and these can be easily welded to form a welded portion. By thermally welding the inner and

outer surface webs

12 and 13, even if the core material 14 absorbs body fluid or the like, it can be made difficult to peel off.

The laminated web of the inner surface web 12, the outer surface web 13, and the core material 14 is compressed in the thickness direction by the groove forming means 17 and further compressed by the sealing means 23, thereby forming the compressed groove 7. The dimension in the thickness direction is reduced not only in the part but also in the whole, and the density is increased. Specifically, the dimension in the thickness direction of the laminated web before compression was about 12.0 to 16.0 mm, while that after compression was about 1.4 to 1.6 mm. . These dimensions are obtained by measuring a portion where the compressed groove 7 is not formed. Further, after compression, the density of the core material around the compressed groove 7 can be about 0.08 to 0.30 g / cm ³ , preferably about 0.10 to 0.25 g / cm ³ .

As described above, since the core material 14 is compressed in the thickness direction by the groove forming means 17 and the sealing means 23 and its density is increased, absorption of body fluid can be promoted. In particular, since the density becomes higher in the compressed groove 7, it is possible to quickly absorb body fluid in the compressed groove 7.

Since a hot melt adhesive is applied between the inner surface web 12, the core material 14, and the outer surface web 13, the hot melt adhesive is melted by the heated groove forming means 17, so Can flow into. As described above, the hot melt adhesive can strengthen the bonding between the inner surface web 12 and the core material 14 and the bonding between the outer surface web 13 and the core material 14. Therefore, the formed panty liner 1 can make the core 14 difficult to move with respect to the inner and

outer surface sheets

2 and 3, and can be prevented from being twisted.

The inner surface web 12 is a fiber nonwoven fabric such as an air-through nonwoven fabric, a point bond nonwoven fabric, or a spunbond nonwoven fabric, and includes short fibers having an average fiber length of about 20 to 60 mm. This is because when the inner surface web 12 is pressed by the groove forming means 17, the short fibers are easily released from other fibers and come into contact with the outer surface web 13, and are easily heat-welded with the fibers of the outer surface web 13.

In the manufacturing method of this embodiment, the formation of the compressed groove 7 and the compression of the entire product can be performed simultaneously. That is, since it is not necessary to compress the core material 14 in advance before forming the compressed groove 7, the process can be simplified accordingly. Moreover, since the core material 14 is not squeezed beforehand before forming the pressing groove 7, when forming the pressing groove 7, the core material 14 is easy to move, and these core materials 14 are made into the 2nd convex part 19. Can easily be pushed away. In addition, before the cutting in the fifth step, it is also possible to apply a temporary fixing adhesive to the leakage preventing web 15 and laminate the release web.

FIG. 6 illustrates another form of the compressed groove 7 formed in the panty liner 1. As shown in the figure, for example, a floral recess 31 may be formed at the intersection of the compressed grooves 7. The length dimension of the concave portion 31 in the thickness direction is substantially the same as that of the first portion 8. In this manner, by forming the recess 31, it is possible to give visual pleasure to the wearer. By forming the recess 31, the total area of the compressed groove 7 can be increased. Further, by forming the recess 31 on the extension line of the compressed groove 7, the panty liner 1 can be prevented from being bent along the compressed groove 7. In addition, the recessed part 31 may be formed so that it may overlap with the pressing groove 7, and there may exist what remove | deviates from this and is formed.

FIG. 7 illustrates another form of the compressed groove 7 formed in the panty liner 1. As shown in the figure, for example, the compressed groove 7 may be wave-shaped extending in the longitudinal direction Y. Even in this case, the first portion and the second portion are formed. Further, by making it wavy, the compressed groove 7 can be prevented from substantially overlapping the virtual vertical center line PP and the virtual horizontal center line QQ, and the panty liner 1 along these center lines. Can be prevented from bending.

The concave portion 31 can also be formed on the wavy linear groove 7 described above. Moreover, the pressing groove 7 of this invention can also make it the area larger than another area | region in the center part of the vertical direction Y and the horizontal direction X of the panty liner 1. FIG. By increasing the area of the compressed groove 7 at the central portion, the rigidity of the central portion that is most likely to be swelled can be improved and kinking can be prevented. Thus, by changing the area ratio in each area | region of the pressing groove 7, rigidity can also be changed partially.

The shape, size, and the like of the first portion 8, the second portion 9 and the recess 31 of the compressed groove 7 can be changed as appropriate, and are not limited to these embodiments. In addition to the materials described in the present specification, various known materials that are normally used in this type of field can be used without limitation for each component member constituting the panty liner 1. . In the specification and claims of this invention, the terms “first” and “second” are used merely to distinguish similar elements, positions, and the like.

1 Pantilina (Body fluid treatment product)
2 inner surface sheet 3 outer surface sheet 4 core material 6 seal part 7 pressing groove 8 first part 9 second part 12 inner surface web (first web)
13 External web (second web)
14 Core material 17 Groove forming means 18 1st convex part 19 2nd convex part 20 Embossing roll 21 Backup roll 23 Sealing means 27 Cutting means X Horizontal direction Y Vertical direction

Claims

It has a longitudinal direction and a lateral direction, has a body side and its opposite side, a liquid-permeable inner surface sheet located on the body side, an outer surface sheet located on the opposite side, and a liquid absorption located between these sheets A bodily fluid treatment article in which a plurality of compressed grooves are formed in the inner surface sheet,
The inner sheet and the outer sheet are formed of a fiber nonwoven fabric,
The compressed groove is formed across the longitudinal direction and the lateral direction of the inner sheet, and from the first part formed from the inner sheet toward the outer sheet, and the first part. A second portion formed to be continuous with the first portion toward the outer sheet,
In the second part, at least a part of the fibers of the inner surface sheet and the fibers of the outer surface sheet are welded to each other.
2. The body fluid treatment article according to claim 1, wherein the inner sheet and the outer sheet are formed of a fiber nonwoven fabric containing a thermoplastic synthetic resin.
The bodily fluid treatment article according to claim 1 or 2, wherein a plurality of the second parts are intermittently arranged in at least one of the vertical direction and the horizontal direction in the compressed groove.
The compressed groove is inclined with respect to a virtual vertical center line that bisects the length dimension in the horizontal direction and a virtual horizontal center line that bisects the length direction in the vertical direction. The body fluid treatment product according to any one of the above.
The body fluid treatment article according to any one of claims 1 to 4, wherein the compressed groove further includes a concave portion that overlaps with a part of the first portion and an extension line of the compressed groove.
The body fluid treatment article according to any one of claims 1 to 5, wherein the core material has a mass per unit area of 70 to 350 g / m 2 .
The body fluid treatment article according to any one of claims 1 to 6, wherein the compressed groove is 10 to 30% of an area of the inner sheet.
The body fluid treatment article according to any one of claims 1 to 7, wherein the inner sheet includes short fibers.
A process for forming a plurality of compressed grooves in a laminated web including first and second webs formed of a fiber nonwoven fabric containing a thermoplastic synthetic resin and a liquid-absorbent core material disposed between the webs In
The laminated web formed by the first and second webs and the core material is compressed by the step of laminating the core material and the second web on the first web and the groove forming means, and the compressed groove. Forming the sealing portion by joining the first and second webs around the core material by sealing means, and cutting the first and second webs by the sealing means. Cutting around
The groove forming means includes an embossing roll formed with a first convex part and a second convex part protruding from the first convex part, and a backup roll facing the same and having a smooth surface, and the embossing roll. The laminated web is pressurized and heated by the backup roll, and at least some of the fibers of the first and second webs are thermally welded at the positions corresponding to the second convex portions. Manufacturing method.