CA2015091C - Manufacturing method of structural parts for wearing products - Google Patents
Manufacturing method of structural parts for wearing productsInfo
- Publication number
- CA2015091C CA2015091C CA002015091A CA2015091A CA2015091C CA 2015091 C CA2015091 C CA 2015091C CA 002015091 A CA002015091 A CA 002015091A CA 2015091 A CA2015091 A CA 2015091A CA 2015091 C CA2015091 C CA 2015091C
- Authority
- CA
- Canada
- Prior art keywords
- web
- partial
- partial webs
- webs
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15723—Partitioning batts; Cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
- B31D1/04—Multiple-step processes for making flat articles ; Making flat articles the articles being napkins, handkerchiefs, towels, doilies, or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1007—Running or continuous length work
- Y10T156/1015—Folding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
- Y10T156/1077—Applying plural cut laminae to single face of additional lamina
Abstract
This invention concerns a manufacturing method of the structural parts for wearing products. More specifically, it concerns a manufacturing method of the structural parts of disposable diapers, baby training pants, or other wearing products. A concavoconvex cutting line is applied repetitively in a periodical way in the longitudinal direction of a continuous first web to form the first and the second partial webs; the said first partial web is offset with respect to he said second partial web in the longitudinal direction by a prescribed interval, so that the concave edges and the convex edges of the first and second partial webs are positioned opposite and aligned to each other, respectively. A continuous second web is used to connect the outside edges opposite to the said aligned concave and convex edge portions of the first and second partial webs;
as the second web is bonded with the outside edges of the partial webs, a composite web is formed; the first and second partial webs of the composite web are spread to the outer sides.
as the second web is bonded with the outside edges of the partial webs, a composite web is formed; the first and second partial webs of the composite web are spread to the outer sides.
Description
~01509~
Detailed explanation of the invention Industrial application field This invention concerns a manufacturing method of the structural parts for wearing products. More specifically, it concerns a manufacturing method of the structural parts of disposable diapers, baby training pants, or other wearing products.
Conventional techniques In the conventional manufacturing method of disposable wearing products, in order to cut the manufacturing cost by reducing waste in the materials, a continuous web is cut along the longitudinal central line to form symmetric concavoconvex edge portions. Then, the partial webs are cut at the prescribed length to form the structural parts, such as disclosed in Japanese Kokai Patents Nos. Sho 62[1987]-231659 and Sho 62[1987]-250202.
In the former specification, it is indicated that the said partial webs are assembled as the tape fastener of the disposable diaper. However, there is no specific description of this method.
In the latter specification, it is pointed out that the said partial webs are used to form the die-shaped [sic~ absorp-tive body which is used to assemble the disposable diaper.
In this scheme, one of the pair of partial webs having concavoconvex edge portions makes a rotation around and oblique roll so that it is offset from the other web; in this way, with the concavoconvex edge portions of the webs located on the outsides and symmetric to each other, they are laminated with each 201~091 other, followed by cutting at prescribed positions in the transverse direction to form the die-shaped absorptive body.
Problems to be solved by the invention However, in the scheme disclosed in the latter specification, as one of the partial webs is made to rotate 1 cycle on an oblique roll so that it is offset with respect to the other partial web, the interval alignment is difficult because the said partial web may easily slide in the axial direction on the roll. Besides, when twisting takes place for one partial web, the other partial web may be entangled with the first partial web. Hence, it is still a topic to be solved for incorporating these webs at a high speed with the other structural parts.
The purpose of this invention is to provide a manufacturing method of the structural parts of the wearing product character-ized by the following features: for a pair of partial webs, one web is offset with respect to the other web without twisting or entangling with each other; the concave edge portions and the convex edge portions of these webs are made opposite and aligned to each other, respectively; with these aligned concavoconvex portions of the webs arranged on the outsides, the wearing product is manufactured.
Means to solve the problem In order to realize the aforementioned purpose, in the method of this invention, a concavoconvex cutting line is applied repetitively in a periodical way in the longitudinal direction of a continuous first web to form the first and second partial webs; the said first partial web is offset 201~091 with respect to the said second partial web in the longitudinal direction by a prescribed interval, so that the concave edges and the convex edges of the first and second partial webs are positioned opposite and aligned to each other, respectively.
Then, a continuous second web is used to connect the outside edges opposite to the said aligned concave and convex edge portions of the first and second partial webs; as the second web is bonded with the outside edges of the partial webs, a com-posite web is formed; the first and second partial webs of the composite web are spread.to the outer sides.
When the said first and second partial webs are bonded with the said second web, a fold-back portion can be formed at each outside edge portion of the second web and the formed fold-back portions are bonded with the outside edges of the first and second partial webs; it is also possible to form fold-back portions at the outer edge portions of the first and second partial webs and to bond these fold-back portions with the outside edge portions of the second web.
It is preferred that the said first partial web be offset by a prescribed interval in the longitudinal ~irection with respect to the said second partial web to ensure alignment between the opposite concave edge portions and between the opposite concave edge portions of the first and second partial webs by arranging a roller with a prescribed diameter at a position in the direction perpendicular to the transfer plane of the second partial web with a prescribed vertical difference and at a right angle to the transfer direction of the first and second partial web and ma~ing the first partial web go through this roller.
- Brief Explanation of the Fiqures Figure 1 is a schematic side view of the apparatus for implementing the method of this invention.
Figure 2 is a schematic side view of another apparatus for implementing the method of this invention.
Figure 3 is an oblique view of a portion of the apparatus shown in Figure 2.
Figure 4 is a plane view showing the state of aligned opposite concave and convex edges of the first and second partial webs formed by cutting along the concavoconvex cutting line running along the longitudinal central line of the first web in a symmetric way.
Figure 5 is a cross-sectional view cut along the V-V
line in Figure 4.
Figure 6 is a plane view illustrating the state of the composite web in Figure 4 with portions of it spread outwards.
Figure 7 is a cross-sectional view cut along VII-VII
line in Figure 6.
Figures 8A, 8B, and 8D are also cross-sectional views similar to Figure 5 illustrating other examples of compos-ite webs.
Figure 9 is a plane view illustrating the composite web of the first and second webs used as the tape fastener of a disposable diaper.
Figure 10 is a partial plane view of the composite web cut to a prescribed length used as the tape fastener shown in Figure 9 and bonded with the second web.
Figure 11 is a cross-sectional view cut along the XI-XI line in Figure 10.
Figure 12 is a plane view illustrating the state of the composite web shown in Figure 10 with the fold-back portions spread outward together with the tape fasteners.
2olso9l Application examples In the following, tne application examples of the method of this invention will be explained with reference to figures.
Figures 1-3 schematically illustrate apparatus (10) for implementing the method of this invention. In apparatus (10) shown in Figure 1, there are the following parts for processing continuous first web ~30): roll cutter (11), guide rolls (12), (13), (14), bearing roll (15), and pressing roll (16). In apparatus (10) shown in Figure 2, the following parts are used to process continuous first web (30): roll cutter (11), guide rolls (12), (13), and guide/pressing roll (17). In apparatus (10) shown in Figure 1, guide roll t12) is arranged at a certain distance above guide rolls (13), (14) which are arranged opposite to each other at a certain distance.
On the other hand, in apparatus (10) shown in Figure 2, guide roll (12) is arranged in contact with or near guide roll (13) and pressing roll (17) which are located opposite to each otl-i~r at a certain distance. For apparatus (10) shown in Figure 1 and that shown in Figure 2, the processing operation schemes of the continuous first web (30) are substantially the same.
In order to process continuous first web (30) and continuous second web (40), in addition to said bearing roll (lS) and said pressing rolls (16) and (17), apparatus (10) also contains a porous belt conveyor (18), a suction unit (19), a bending guider (20), and a coating unit (21). Figure 3 illustrates a portion of apparatus (10) shown in Figure 2.
As shown in Figure 4, continuous first web (30) has substantially parallel side edges (31a), (31b); with respect to longitudinal central line (32) cutting line (33) for forming concavo-convex portions is drawn repetitively in a periodical way along the longitudinal direction, so that the first web is 2alsD~l cut by said roll cutter (11) to form first division web (30a) and [second partial web] (30b) having concave edge portions (33a) and convex edge portions (33b).
As shown in Figure 3 ~also see Figures 1 and 2), first partial web (30a) is made to pass above guide roll (12) and below guide roll (13) and pressing roll (17). In this way, it is separated from second partial web (30b). At the same time, as it is transferred to bonding station (22) containing bearing roll (15) and pressing roll (16), it is offset in the longitudinal direction by an interval of (l/2)n (where n is an odd num~er) with respect to second partial web (30b).
In this way, concave edge portions (33a) as well as convex edge portions (33b) of the first and second partial webs ~30a~, (30b) are made opposite and aligned with each other, respectively. In this case, opposite convex edge portions (33b) are laminated. In this way, the interval of offset of the first partial web (30a) with respect to second partial web (30b) in the longitudinal direction can be determined by the diameter of guide roll (12) and the height of guide roll (12) above the transfer plane of second partial web (30b). In the applica-tion example, it is preferred that guide roll (12) be rotated.
However, it is also possible to arrange guide roll (12) separately without coupling to other rolls by contact between peripheries. In this case, the guide roll may not be rotatable.
On the other hand, in folding guider (20), second web (40) has its two sides folded back to the upper surface. After adhesive (42) is coated on fold-back portions (41) by coating unit (21), it is located below said aligned first and second partial webs (30a), (30b); these webs are made to pass between bearing roll (15) and pressing roll (12) [sic~ together.
After this passage, as shown in Figure S, outside edges (31a), (31b) of first and second partial webs (30a), (30b) are bonded with fold-back portions (41) of second web (40) by adhesive (42). In this way, a continuous composite web (SO) is formed from first and second partial webs (30a), (30b) and second web (40). As composite web (SO) is transferred to the next stage for processing on belt conveyor (18), first and second partial webs (30a), (30b) are spread outwards by a spreading unit (not shown in the figure) arranged on belt conveyor (18) near the downstream side of bonding station (22), as shown in Figures 6 and 7.
The composite web (50) that can be manufactured using this scheme can be used as the structural part of wearing products, such as top sheet, back sheet, mat-like core, etc., of disposable diapers. It is well-known that the top sheet is made of nonwoven fabric, porous plastic film, or other thin soft and liquid permeable materials; the back sheet is made of plastic film, laminate of plastic film and nonwoven fabric, or other thin soft and li~uid barrier materials; and the mat-like core is made of fluffy pulp, mixture of pulp and high-absorptivity polymer powder, or other relatively thick elastic and liquid absorptive materials. When composite web (50) is used as these structural parts, the first and second partial webs (30a), (30b) and second web (40) may be made of materials having different properties.
Figures 8A-8D illustrate some variation examples of the composite web before spreading, manufactured either by the said apparatus (10) in its original form or by an apparatus with positions changed partially from that of apparatus (10).
In these figures, as the parts and portions indicated by the same symbols as in said composite web (50) are identical or similar to those of the said composite web, only a minimum explanation for composite webs (SOa), (50b), (50c), (50d) will be presented. Their manufacturing methods are essentially identical to the manufacturing method of said composite web (SO).
For composite web (SOa) shown in Figure 8A, compared with first and second partial webs (30a) and (30b), second web (40) and fold-back portions (41) are formed wider. For composite web (50b) shown in Figure 8B, compared with second web (40), first and second partial webs (30a), (30b) are formed wider, and the two side portions of these partial webs are folded back to the lower surface and bonded with second web (40). For composite web (SOc) shown in Figure 8C, relatively thick first and second webs (30a), (30b) are connected to relatively thick second web (40) via folded ribbon sheets (43) made of a thin nonwoven fabric which are bonded with them. For composite web (50d) shown in Figure 8D, first and second partial webs (30a), (30b) are located below second web (40). The composite webs (SOa), (50b), and (SOd) shown in Figures 8A, 8B, and 8D are suitable for applications as the top sheet and/or back sheet of a disposable diaper. The composite web (50c) shown in Figure 8C is suitable for application as the mat-like core of a disposable diaper which has two side portions which are dif-ficult to fold back.
When continuous composite webs (50) man~lfact:ured in the aforementioned scheme are used as, say, the top sheet and back sheet of the disposable diaper (in this case, although not shown in the figures, apparatus (10) has a structure enabling -manufacture of continuous composite webs (SO) as two rows with one above the other), mat-like cores formed separately are arranged between these sheets intermittently in sequence in the longitudinal direction; the peripheral portions of these sheets are bonded to form diaper laminates in a continuous way. Then, at prescribed positions of the laminate without core inserted, such as the positions indicated by the dash-dot lines in Figure 6, the laminate is cut in the transverse 20150gl direction to form individual diapers. For the top sheet and back sheet, it is also possible to use the following scheme:
only one web is manufactured as a composite web (50), while for the other web, after the said laminate is formed, portions on its outer side are cut off in alignment with the concave edge portions of the first web. In addition, when composite web (50) is the core, composite web (50) can be cut beforehand at said positions (44) to form individual pieces, which are inserted between the top sheet and back sheet intermittently in the longitudinal direction to form the said laminate, which is then cut as mentioned above. In this manufacturing example, the overall configuration of the manufàcturing system of diapers is able to form the top sheet and/or back sheet in the form of composite web (50), as apparatus (10) can be incorporated into the said system.
Figures 9-12 illustrate the example of using first and second partial webs (30a), (30b) as the pressing tape fasteners attached to the waistband of a disposable diaper.
In this case, for first and second partial webs (30a), (30b), it is possible to align the opposite concave and convex edge portions (33a), (33b) manufactured using the said method (see Figure 9). In this case, tape pieces (130a), (130b) are formed by cutting concave and convex edge portions (33a), (33b); for example, with a length containing two convex edge portions (33b), the partial webs are separated along central lines (45) at concave portions (33a). These tape pieces are bonded with adhesive (42) on fold-back portions (41) on the two sides of the back sheet or top sheet as the second web (40) to form composite web (50e) (see Figures 10 and 11). The position of bonding of tape pieces (130a), (130b) on second web (40) is at line (44) along which the individual diapers are to be cut out from the continuous diaper laminate prepared in the 201~0~1 -necessary process to form the end edges of the waistbands of the individual diapers. Hence, as the diaper laminate is cut to individual diapers along these lines, tape pieces (130a), (130b) are further divided to form the tape pieces for individual diapers.
Effects of the invention According to the method of this invention, the first and second ~partial] webs formed by dividing are positioned properly to ensure that the opposite concave edge portions as well as the convex edge portions positioned at the central portions of the said partial webs are aligned with each other, respectively; the outer edge portions of a second web are bonded with the outer edge portions of the aligned first and second partial webs-to form a composite web; by spreading the first and second partial webs of the composite web outwards, the concave and convex edge portions are positioned on the outer sides. This scheme for positioning the opposite aligned concave and convex edge portions on the outsides is very simple.
In addition, fold-back portions are formed on the outer edges of the second web. The fold-back portions are bonded with the outer edges of the first and second partial webs.
It is also possible to form the fold-back portions at the outer edges of the first and second partial webs, and to bond these fold-back portions to the second web. In this way, the said spreading operation can be carried out easily, and the finish of the said compound web is excellent.
In addition, a roller with a prescribéd diameter is set above the transfer plane of the second partial web with a certain height in the vertical direction and at a right angle to the transfer direction of the first and second partial g 201509i - web. By making the first partial web go around this roller, the first partial web is offset with respect to the second partial web to ensure the alignment between the opposite concave and convex edge portions. In this way, without twisting the first web and without the need to cross the first and second webs, these webs can be assembled with other structural parts at a high speed in a stable way.
The method of this invention can be used for manufac-turing various structural parts of wearing products, such as top sheets, back sheets, mat-shaped cores, tape fas-teners, etc.
B
Detailed explanation of the invention Industrial application field This invention concerns a manufacturing method of the structural parts for wearing products. More specifically, it concerns a manufacturing method of the structural parts of disposable diapers, baby training pants, or other wearing products.
Conventional techniques In the conventional manufacturing method of disposable wearing products, in order to cut the manufacturing cost by reducing waste in the materials, a continuous web is cut along the longitudinal central line to form symmetric concavoconvex edge portions. Then, the partial webs are cut at the prescribed length to form the structural parts, such as disclosed in Japanese Kokai Patents Nos. Sho 62[1987]-231659 and Sho 62[1987]-250202.
In the former specification, it is indicated that the said partial webs are assembled as the tape fastener of the disposable diaper. However, there is no specific description of this method.
In the latter specification, it is pointed out that the said partial webs are used to form the die-shaped [sic~ absorp-tive body which is used to assemble the disposable diaper.
In this scheme, one of the pair of partial webs having concavoconvex edge portions makes a rotation around and oblique roll so that it is offset from the other web; in this way, with the concavoconvex edge portions of the webs located on the outsides and symmetric to each other, they are laminated with each 201~091 other, followed by cutting at prescribed positions in the transverse direction to form the die-shaped absorptive body.
Problems to be solved by the invention However, in the scheme disclosed in the latter specification, as one of the partial webs is made to rotate 1 cycle on an oblique roll so that it is offset with respect to the other partial web, the interval alignment is difficult because the said partial web may easily slide in the axial direction on the roll. Besides, when twisting takes place for one partial web, the other partial web may be entangled with the first partial web. Hence, it is still a topic to be solved for incorporating these webs at a high speed with the other structural parts.
The purpose of this invention is to provide a manufacturing method of the structural parts of the wearing product character-ized by the following features: for a pair of partial webs, one web is offset with respect to the other web without twisting or entangling with each other; the concave edge portions and the convex edge portions of these webs are made opposite and aligned to each other, respectively; with these aligned concavoconvex portions of the webs arranged on the outsides, the wearing product is manufactured.
Means to solve the problem In order to realize the aforementioned purpose, in the method of this invention, a concavoconvex cutting line is applied repetitively in a periodical way in the longitudinal direction of a continuous first web to form the first and second partial webs; the said first partial web is offset 201~091 with respect to the said second partial web in the longitudinal direction by a prescribed interval, so that the concave edges and the convex edges of the first and second partial webs are positioned opposite and aligned to each other, respectively.
Then, a continuous second web is used to connect the outside edges opposite to the said aligned concave and convex edge portions of the first and second partial webs; as the second web is bonded with the outside edges of the partial webs, a com-posite web is formed; the first and second partial webs of the composite web are spread.to the outer sides.
When the said first and second partial webs are bonded with the said second web, a fold-back portion can be formed at each outside edge portion of the second web and the formed fold-back portions are bonded with the outside edges of the first and second partial webs; it is also possible to form fold-back portions at the outer edge portions of the first and second partial webs and to bond these fold-back portions with the outside edge portions of the second web.
It is preferred that the said first partial web be offset by a prescribed interval in the longitudinal ~irection with respect to the said second partial web to ensure alignment between the opposite concave edge portions and between the opposite concave edge portions of the first and second partial webs by arranging a roller with a prescribed diameter at a position in the direction perpendicular to the transfer plane of the second partial web with a prescribed vertical difference and at a right angle to the transfer direction of the first and second partial web and ma~ing the first partial web go through this roller.
- Brief Explanation of the Fiqures Figure 1 is a schematic side view of the apparatus for implementing the method of this invention.
Figure 2 is a schematic side view of another apparatus for implementing the method of this invention.
Figure 3 is an oblique view of a portion of the apparatus shown in Figure 2.
Figure 4 is a plane view showing the state of aligned opposite concave and convex edges of the first and second partial webs formed by cutting along the concavoconvex cutting line running along the longitudinal central line of the first web in a symmetric way.
Figure 5 is a cross-sectional view cut along the V-V
line in Figure 4.
Figure 6 is a plane view illustrating the state of the composite web in Figure 4 with portions of it spread outwards.
Figure 7 is a cross-sectional view cut along VII-VII
line in Figure 6.
Figures 8A, 8B, and 8D are also cross-sectional views similar to Figure 5 illustrating other examples of compos-ite webs.
Figure 9 is a plane view illustrating the composite web of the first and second webs used as the tape fastener of a disposable diaper.
Figure 10 is a partial plane view of the composite web cut to a prescribed length used as the tape fastener shown in Figure 9 and bonded with the second web.
Figure 11 is a cross-sectional view cut along the XI-XI line in Figure 10.
Figure 12 is a plane view illustrating the state of the composite web shown in Figure 10 with the fold-back portions spread outward together with the tape fasteners.
2olso9l Application examples In the following, tne application examples of the method of this invention will be explained with reference to figures.
Figures 1-3 schematically illustrate apparatus (10) for implementing the method of this invention. In apparatus (10) shown in Figure 1, there are the following parts for processing continuous first web ~30): roll cutter (11), guide rolls (12), (13), (14), bearing roll (15), and pressing roll (16). In apparatus (10) shown in Figure 2, the following parts are used to process continuous first web (30): roll cutter (11), guide rolls (12), (13), and guide/pressing roll (17). In apparatus (10) shown in Figure 1, guide roll t12) is arranged at a certain distance above guide rolls (13), (14) which are arranged opposite to each other at a certain distance.
On the other hand, in apparatus (10) shown in Figure 2, guide roll (12) is arranged in contact with or near guide roll (13) and pressing roll (17) which are located opposite to each otl-i~r at a certain distance. For apparatus (10) shown in Figure 1 and that shown in Figure 2, the processing operation schemes of the continuous first web (30) are substantially the same.
In order to process continuous first web (30) and continuous second web (40), in addition to said bearing roll (lS) and said pressing rolls (16) and (17), apparatus (10) also contains a porous belt conveyor (18), a suction unit (19), a bending guider (20), and a coating unit (21). Figure 3 illustrates a portion of apparatus (10) shown in Figure 2.
As shown in Figure 4, continuous first web (30) has substantially parallel side edges (31a), (31b); with respect to longitudinal central line (32) cutting line (33) for forming concavo-convex portions is drawn repetitively in a periodical way along the longitudinal direction, so that the first web is 2alsD~l cut by said roll cutter (11) to form first division web (30a) and [second partial web] (30b) having concave edge portions (33a) and convex edge portions (33b).
As shown in Figure 3 ~also see Figures 1 and 2), first partial web (30a) is made to pass above guide roll (12) and below guide roll (13) and pressing roll (17). In this way, it is separated from second partial web (30b). At the same time, as it is transferred to bonding station (22) containing bearing roll (15) and pressing roll (16), it is offset in the longitudinal direction by an interval of (l/2)n (where n is an odd num~er) with respect to second partial web (30b).
In this way, concave edge portions (33a) as well as convex edge portions (33b) of the first and second partial webs ~30a~, (30b) are made opposite and aligned with each other, respectively. In this case, opposite convex edge portions (33b) are laminated. In this way, the interval of offset of the first partial web (30a) with respect to second partial web (30b) in the longitudinal direction can be determined by the diameter of guide roll (12) and the height of guide roll (12) above the transfer plane of second partial web (30b). In the applica-tion example, it is preferred that guide roll (12) be rotated.
However, it is also possible to arrange guide roll (12) separately without coupling to other rolls by contact between peripheries. In this case, the guide roll may not be rotatable.
On the other hand, in folding guider (20), second web (40) has its two sides folded back to the upper surface. After adhesive (42) is coated on fold-back portions (41) by coating unit (21), it is located below said aligned first and second partial webs (30a), (30b); these webs are made to pass between bearing roll (15) and pressing roll (12) [sic~ together.
After this passage, as shown in Figure S, outside edges (31a), (31b) of first and second partial webs (30a), (30b) are bonded with fold-back portions (41) of second web (40) by adhesive (42). In this way, a continuous composite web (SO) is formed from first and second partial webs (30a), (30b) and second web (40). As composite web (SO) is transferred to the next stage for processing on belt conveyor (18), first and second partial webs (30a), (30b) are spread outwards by a spreading unit (not shown in the figure) arranged on belt conveyor (18) near the downstream side of bonding station (22), as shown in Figures 6 and 7.
The composite web (50) that can be manufactured using this scheme can be used as the structural part of wearing products, such as top sheet, back sheet, mat-like core, etc., of disposable diapers. It is well-known that the top sheet is made of nonwoven fabric, porous plastic film, or other thin soft and liquid permeable materials; the back sheet is made of plastic film, laminate of plastic film and nonwoven fabric, or other thin soft and li~uid barrier materials; and the mat-like core is made of fluffy pulp, mixture of pulp and high-absorptivity polymer powder, or other relatively thick elastic and liquid absorptive materials. When composite web (50) is used as these structural parts, the first and second partial webs (30a), (30b) and second web (40) may be made of materials having different properties.
Figures 8A-8D illustrate some variation examples of the composite web before spreading, manufactured either by the said apparatus (10) in its original form or by an apparatus with positions changed partially from that of apparatus (10).
In these figures, as the parts and portions indicated by the same symbols as in said composite web (50) are identical or similar to those of the said composite web, only a minimum explanation for composite webs (SOa), (50b), (50c), (50d) will be presented. Their manufacturing methods are essentially identical to the manufacturing method of said composite web (SO).
For composite web (SOa) shown in Figure 8A, compared with first and second partial webs (30a) and (30b), second web (40) and fold-back portions (41) are formed wider. For composite web (50b) shown in Figure 8B, compared with second web (40), first and second partial webs (30a), (30b) are formed wider, and the two side portions of these partial webs are folded back to the lower surface and bonded with second web (40). For composite web (SOc) shown in Figure 8C, relatively thick first and second webs (30a), (30b) are connected to relatively thick second web (40) via folded ribbon sheets (43) made of a thin nonwoven fabric which are bonded with them. For composite web (50d) shown in Figure 8D, first and second partial webs (30a), (30b) are located below second web (40). The composite webs (SOa), (50b), and (SOd) shown in Figures 8A, 8B, and 8D are suitable for applications as the top sheet and/or back sheet of a disposable diaper. The composite web (50c) shown in Figure 8C is suitable for application as the mat-like core of a disposable diaper which has two side portions which are dif-ficult to fold back.
When continuous composite webs (50) man~lfact:ured in the aforementioned scheme are used as, say, the top sheet and back sheet of the disposable diaper (in this case, although not shown in the figures, apparatus (10) has a structure enabling -manufacture of continuous composite webs (SO) as two rows with one above the other), mat-like cores formed separately are arranged between these sheets intermittently in sequence in the longitudinal direction; the peripheral portions of these sheets are bonded to form diaper laminates in a continuous way. Then, at prescribed positions of the laminate without core inserted, such as the positions indicated by the dash-dot lines in Figure 6, the laminate is cut in the transverse 20150gl direction to form individual diapers. For the top sheet and back sheet, it is also possible to use the following scheme:
only one web is manufactured as a composite web (50), while for the other web, after the said laminate is formed, portions on its outer side are cut off in alignment with the concave edge portions of the first web. In addition, when composite web (50) is the core, composite web (50) can be cut beforehand at said positions (44) to form individual pieces, which are inserted between the top sheet and back sheet intermittently in the longitudinal direction to form the said laminate, which is then cut as mentioned above. In this manufacturing example, the overall configuration of the manufàcturing system of diapers is able to form the top sheet and/or back sheet in the form of composite web (50), as apparatus (10) can be incorporated into the said system.
Figures 9-12 illustrate the example of using first and second partial webs (30a), (30b) as the pressing tape fasteners attached to the waistband of a disposable diaper.
In this case, for first and second partial webs (30a), (30b), it is possible to align the opposite concave and convex edge portions (33a), (33b) manufactured using the said method (see Figure 9). In this case, tape pieces (130a), (130b) are formed by cutting concave and convex edge portions (33a), (33b); for example, with a length containing two convex edge portions (33b), the partial webs are separated along central lines (45) at concave portions (33a). These tape pieces are bonded with adhesive (42) on fold-back portions (41) on the two sides of the back sheet or top sheet as the second web (40) to form composite web (50e) (see Figures 10 and 11). The position of bonding of tape pieces (130a), (130b) on second web (40) is at line (44) along which the individual diapers are to be cut out from the continuous diaper laminate prepared in the 201~0~1 -necessary process to form the end edges of the waistbands of the individual diapers. Hence, as the diaper laminate is cut to individual diapers along these lines, tape pieces (130a), (130b) are further divided to form the tape pieces for individual diapers.
Effects of the invention According to the method of this invention, the first and second ~partial] webs formed by dividing are positioned properly to ensure that the opposite concave edge portions as well as the convex edge portions positioned at the central portions of the said partial webs are aligned with each other, respectively; the outer edge portions of a second web are bonded with the outer edge portions of the aligned first and second partial webs-to form a composite web; by spreading the first and second partial webs of the composite web outwards, the concave and convex edge portions are positioned on the outer sides. This scheme for positioning the opposite aligned concave and convex edge portions on the outsides is very simple.
In addition, fold-back portions are formed on the outer edges of the second web. The fold-back portions are bonded with the outer edges of the first and second partial webs.
It is also possible to form the fold-back portions at the outer edges of the first and second partial webs, and to bond these fold-back portions to the second web. In this way, the said spreading operation can be carried out easily, and the finish of the said compound web is excellent.
In addition, a roller with a prescribéd diameter is set above the transfer plane of the second partial web with a certain height in the vertical direction and at a right angle to the transfer direction of the first and second partial g 201509i - web. By making the first partial web go around this roller, the first partial web is offset with respect to the second partial web to ensure the alignment between the opposite concave and convex edge portions. In this way, without twisting the first web and without the need to cross the first and second webs, these webs can be assembled with other structural parts at a high speed in a stable way.
The method of this invention can be used for manufac-turing various structural parts of wearing products, such as top sheets, back sheets, mat-shaped cores, tape fas-teners, etc.
B
Claims (4)
1. A manufacturing method of structural parts for wearing products characterized by the following features: a concavoconvex cutting line is applied repetitively in a periodical way in the longitudinal direction of a continuous first web to form first and second partial webs; said first partial web is offset with respect to said second partial web in the longitudinal direction by a prescribed interval, so that concave edges and convex edges of the first and second partial webs are positioned opposite and aligned to each other, respectively;
a continuous second web is used to connect outside edges opposite to said aligned concave and convex edge portions of the first and second partial webs; as the second web is bonded with the outside edges of the partial webs, a composite web is formed; the first and second partial webs of the composite web are spread to the outer sides.
a continuous second web is used to connect outside edges opposite to said aligned concave and convex edge portions of the first and second partial webs; as the second web is bonded with the outside edges of the partial webs, a composite web is formed; the first and second partial webs of the composite web are spread to the outer sides.
2. The manufacturing method described in claim 1 characterized by the feature that a fold-back portion is formed at each outer side edge portion of said second web; the fold-back portions are bonded with the outside edges of said first and second partial webs.
3. The manufacturing method described in claim 1 characterized by the feature that fold-back portions are formed on the outside edge portions of said first and second partial webs; the fold-back portions are bonded with the outside edge portions of said second web.
4. The manufacturing method described in claim 1 characterized by the following features: a roller with a prescribed diameter is located at a position perpendicular to a transfer plane of said second web with a prescribed vertical difference and at a right angle with the transfer direction of said first and second partial webs; by making the first partial web pass through the roller, the first partial web is offset appropriately with respect to the second partial web to ensure the opposite matching positioning of the two partial webs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP111698/89 | 1989-04-29 | ||
| JP1111698A JP2622414B2 (en) | 1989-04-29 | 1989-04-29 | Method of manufacturing component for wearing article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2015091A1 CA2015091A1 (en) | 1990-10-29 |
| CA2015091C true CA2015091C (en) | 1998-04-14 |
Family
ID=14567891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002015091A Expired - Lifetime CA2015091C (en) | 1989-04-29 | 1990-04-20 | Manufacturing method of structural parts for wearing products |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5110386A (en) |
| EP (1) | EP0396050B1 (en) |
| JP (1) | JP2622414B2 (en) |
| AT (1) | ATE119759T1 (en) |
| CA (1) | CA2015091C (en) |
| DE (1) | DE69017745T2 (en) |
| ES (1) | ES2069620T3 (en) |
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| CA2053110C (en) * | 1990-12-17 | 2002-09-10 | Bruce M. Siebers | Diaper or absorbent article with tensioning attachment |
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| US5411618A (en) * | 1993-11-24 | 1995-05-02 | Paper Converting Machine Company | Method and apparatus for producing waistband-equipped disposable diapers |
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| US5580411A (en) * | 1995-02-10 | 1996-12-03 | The Procter & Gamble Company | Zero scrap method for manufacturing side panels for absorbent articles |
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| SE504649C2 (en) † | 1995-07-07 | 1997-03-24 | Moelnlycke Ab | Method of manufacturing elements for fasteners intended to be attached to lateral portions of an absorbent article and fasteners |
| JP3131130B2 (en) * | 1995-09-29 | 2001-01-31 | ユニ・チャーム株式会社 | Manufacturing method of wearing article constituent member |
| JP3317836B2 (en) * | 1996-02-28 | 2002-08-26 | ユニ・チャーム株式会社 | Disposable wearing article, method of manufacturing components thereof, and disposable wearing article manufactured thereby |
| US5714027A (en) * | 1996-03-22 | 1998-02-03 | The Procter & Gamble Company | Method of folding and handling a web of material in a continuous operation |
| US20020188268A1 (en) | 1999-06-30 | 2002-12-12 | Mark James Kline | Elastomeric side panel for use with convertible absorbent articles |
| US5759317A (en) * | 1996-07-22 | 1998-06-02 | Kimberly-Clark Worldwide, Inc. | Process for making a mechanical fastener |
| US5906602A (en) * | 1997-03-27 | 1999-05-25 | The Procter & Gamble Company | Shaped absorbent cores comprising multiple pieces of absorbent material and method for making same |
| US6123694A (en) * | 1997-05-09 | 2000-09-26 | Paragon Trade Brands | Disposable absorbent article with unitary leg gathers |
| US20050193462A1 (en) * | 1997-07-08 | 2005-09-08 | Niedermeyer William P. | Disposable front opening garment with selected pad shapes and locations |
| ATE211899T1 (en) * | 1997-11-18 | 2002-02-15 | Schober Werkzeug & Maschbau | DEVICE AND METHOD FOR CONTOUR CUTTING A MATERIAL WEB |
| US5928452A (en) * | 1997-11-26 | 1999-07-27 | The Procter & Gamble Company | Method of making a shaped absorbent interlabial device |
| US5985081A (en) * | 1998-06-26 | 1999-11-16 | Kimberly-Clark Worldwide, Inc. | Process for making a shaped product with no material waste |
| US6730189B1 (en) | 1999-06-25 | 2004-05-04 | The Procter & Gamble Company | Process for manufacturing disposable absorbent articles, and an apparatus for performing the process |
| EP1062928A1 (en) * | 1999-06-25 | 2000-12-27 | The Procter & Gamble Company | Process for manufacturing disposable absorbent articles, and an apparatus for performing the process |
| US6464815B1 (en) * | 2000-05-05 | 2002-10-15 | Wallace J. Beaudry | Method of manufacturing laminated pad |
| US6743324B2 (en) * | 2001-09-17 | 2004-06-01 | The Procter & Gamble Company | Method for manufacturing shaped components from web materials |
| US6913718B2 (en) * | 2001-11-05 | 2005-07-05 | Rayonier Products & Financial Services Company | Method of making shaped components for disposable absorbent articles |
| JP4071056B2 (en) * | 2002-07-04 | 2008-04-02 | ユニ・チャーム株式会社 | Disposable diaper manufacturing method |
| TW584553B (en) * | 2002-08-06 | 2004-04-21 | Uni Charm Corp | Method for continuously producing disposable wearing article |
| US7407557B2 (en) * | 2002-12-18 | 2008-08-05 | Zuiko Corporation | Method for producing disposable wearing article |
| US20040122413A1 (en) * | 2002-12-23 | 2004-06-24 | Kimberly-Clark Worldwide, Inc. | Absorbent article having shaped front and back ears |
| US7635360B2 (en) * | 2003-07-22 | 2009-12-22 | Kimberly-Clark Worldwide, Inc. | Method for the manufacture of a disposable undergarment having a cutout |
| US20050148968A1 (en) * | 2003-12-30 | 2005-07-07 | Schlinz Daniel R. | Disposable absorbent garment including a stretchable carrier layer |
| US20050256495A1 (en) * | 2004-04-29 | 2005-11-17 | Kimberly-Clark Worldwide, Inc. | Composite web and use in an absorbent article |
| US7361167B2 (en) * | 2005-01-20 | 2008-04-22 | The Procter & Gamble Company | Absorbent article having complementary edges for an umbilical notch cut |
| US20060206091A1 (en) * | 2005-03-10 | 2006-09-14 | Tyco Healthcare Retail Services Ag | Absorbent article having a channeled absorbent layer and method of making the same |
| US7972319B2 (en) * | 2005-04-28 | 2011-07-05 | Zuiko Corporation | Wearing article and method of manufacturing the same |
| US7326311B2 (en) * | 2005-04-29 | 2008-02-05 | Kimberly-Clark Worldwide, Inc. | Method of producing intermittently elastic webs |
| US20070078422A1 (en) * | 2005-09-30 | 2007-04-05 | Tyco Healthcare Retail Services Ag | Absorbent article configured for controlled deformation and method of making the same |
| US9427362B2 (en) | 2010-01-20 | 2016-08-30 | The Procter & Gamble Company | Refastenable absorbent article |
| BR112012017966A2 (en) | 2010-01-20 | 2016-05-03 | Procter & Gamble | resealable absorbent article |
| US20110174432A1 (en) | 2010-01-20 | 2011-07-21 | Gary Dean Lavon | Refastenable Absorbent Article |
| JP5728222B2 (en) * | 2010-12-24 | 2015-06-03 | 花王株式会社 | Method for manufacturing absorbent article |
| MX2016011976A (en) | 2014-03-28 | 2016-12-09 | Kimberly Clark Co | Absorbent article with a fastening system with reduced waste and method of manufacturing the same. |
| JP6355430B2 (en) * | 2014-05-26 | 2018-07-11 | 花王株式会社 | Method for manufacturing perforated sheet |
| GB2530073A (en) * | 2014-09-12 | 2016-03-16 | Concepts For Success C4S | Method for Separating Pieces From A Web and Recombining these Machine On the Web Machine Directionally Offset |
| IT201800004893A1 (en) * | 2018-04-27 | 2019-10-27 | PROCEDURE AND APPARATUS FOR MAKING AN ABSORBENT STRUCTURE |
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| US2744844A (en) * | 1952-01-26 | 1956-05-08 | Millville Mfg Company | Hemmed cloth with an adhesive type binder |
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| FR2522521B1 (en) * | 1982-03-02 | 1987-04-17 | Beghin Say Sa | SINGLE USE ARTICLE FOR ABSORBING LIQUIDS |
| FR2586533B1 (en) * | 1985-08-27 | 1987-12-11 | Boussac Saint Freres Bsf | ABSORBENT MAT IN HOURGLASS FORM FOR A PANTY LAYER AND CONTINUOUS MANUFACTURING METHOD OF SUCH MATTRESS. |
| FR2586534B1 (en) * | 1985-08-27 | 1990-10-05 | Boussac Saint Freres Bsf | ABSORBENT MAT IN HOURGLASS FOR A PANTY LAYER AND CONTINUOUS MANUFACTURING METHOD OF SUCH MATTRESS. |
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| US5034007A (en) * | 1990-02-23 | 1991-07-23 | Uni-Charm Corporation | Manufacturing method for disposable clothing items |
-
1989
- 1989-04-29 JP JP1111698A patent/JP2622414B2/en not_active Expired - Lifetime
-
1990
- 1990-04-20 CA CA002015091A patent/CA2015091C/en not_active Expired - Lifetime
- 1990-04-27 ES ES90108104T patent/ES2069620T3/en not_active Expired - Lifetime
- 1990-04-27 US US07/515,126 patent/US5110386A/en not_active Expired - Lifetime
- 1990-04-27 DE DE69017745T patent/DE69017745T2/en not_active Expired - Lifetime
- 1990-04-27 EP EP90108104A patent/EP0396050B1/en not_active Expired - Lifetime
- 1990-04-27 AT AT90108104T patent/ATE119759T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US5110386A (en) | 1992-05-05 |
| EP0396050A3 (en) | 1991-07-31 |
| CA2015091A1 (en) | 1990-10-29 |
| DE69017745D1 (en) | 1995-04-20 |
| DE69017745T2 (en) | 1995-07-06 |
| ES2069620T3 (en) | 1995-05-16 |
| JP2622414B2 (en) | 1997-06-18 |
| ATE119759T1 (en) | 1995-04-15 |
| EP0396050B1 (en) | 1995-03-15 |
| JPH02291857A (en) | 1990-12-03 |
| EP0396050A2 (en) | 1990-11-07 |
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| EEER | Examination request | ||
| MKEX | Expiry |