JP5368597B2 - Method for manufacturing individual package of absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an individual package of an absorbent article, in which inferior transfer of an adhesive to a wing part can hardly occur and disposal of release paper is not required in use. <P>SOLUTION: The manufacturing method of the individual package 1 of the absorbent article 10 to which the release paper 3 is removably joined on the side of a non-skin-contact surface of the wing parts 8, 8 with the adhesive M1, and which is packaged individually in a packaging material has: a process P2 for removably joining the release paper 3 with the adhesive M1 using a pair of a roll 63A and a roll 62B on the side of the non-skin-contact surface of the wing parts 8, 8 under the state where they extend outward in the width direction of an absorbent body 4; and a process P3 for turning back the pair of wing parts 8, 8 to the side of skin-contact surface of the absorbent body 4 so that a distal end 82 faces inward in the width direction of the absorbent body 4 and that the pair of release paper 3, 3 have parts 83 overlapped on the central part in the width direction of the absorbent body 4, thereby joining the parts 83 with each other. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a method for manufacturing an individual package of an absorbent article individually packaged with a packaging material, and more specifically, a substantially vertically long absorbent body having an absorbent layer and a leak-proof layer, and both sides of the absorbent body. A pair of release papers are detachably joined to the non-skin contact surface side of the pair of wing portions in the absorbent article having a pair of wing portions extending from the edge portions, respectively, with an adhesive. The present invention relates to a method for manufacturing an individually packaged absorbent article.

2. Description of the Related Art Conventionally, absorbent articles such as panty liners (corimono sheets), sanitary napkins, incontinence pads, and the like that have a pair of wing portions are known. From the viewpoint of portability, such an absorbent article is folded together with the packaging material in a state where the pair of wing portions are folded inward in the width direction of the absorbent article, and a predetermined portion of the packaging material is sealed. It is marketed as an individual package individually packaged.
As such an individual package, a non-slip adhesive layer for fixing the absorbent article to shorts or the like is provided on the non-skin contact surfaces of the pair of wing portions, and the pair of wing portions includes the adhesive. It is known that the layer is folded to the skin contact surface side of the absorbent article so that the layer faces the upper surface, and the release paper that covers the adhesive layer is arranged on the upper surface of the pair of folded wing portions. ing.
In addition, as a method for manufacturing such an individual package, for example, a pair of wing portions are folded on the skin contact surface side of the absorbent article so that the tips thereof face inward in the width direction of the absorbent article. Thereafter, a method is known in which a release paper coated with an adhesive is pasted over a pair of wing parts (see Patent Document 1).

  In the method described in Patent Document 1, the release paper and the wing portion are joined by integrally pressing the release paper, the wing portion, and the main body with the pair of wing portions folded on the main body of the absorbent article. Done. Therefore, the pressure force is absorbed by the absorber constituting the main body, the adhesive applied to the release paper is difficult to transfer to the wing part, and the transfer of the adhesive to the wing part is likely to fail. was there. In particular, when a non-woven fabric is used as the material of the wing part, this problem is remarkable. In addition, when the pressure is applied so that the adhesive is sufficiently transferred to the wing part, there is a problem that the absorbent body is crushed and hardened.

In addition, there is also known a method in which release paper is attached to each of the pair of wing portions in a state where the pair of wing portions extend outward in the width direction (see Patent Document 2).
However, in the method described in Patent Document 2, since the release papers attached to the pair of wing parts are not joined to each other, the two release papers are peeled off from the wing parts when the absorbent article is used. There was a problem that it was necessary and unusable.
Further, a release paper is arranged on each of the pair of wing portions, the pair of wing portions are folded back to the skin contact surface side of the absorbent article, and a part of the pair of release papers is overlapped with each other and joined to be separable. Absorbent articles are also known (see Patent Document 3). However, the joining of the pair of release papers in the absorbent article described in Patent Document 3 is a weak joint for maintaining the folded state of the pair of wing portions, and the pair of release papers are easily separated. is there.

Japanese National Patent Publication No. 5-506799 JP-A-8-66427 Japanese Patent Laid-Open No. 9-234218

  Accordingly, an object of the present invention is to provide a method for manufacturing an individual package of an absorbent article, in which transfer failure of the adhesive to the wing portion hardly occurs, and the release paper can be easily treated during use.

  The present invention relates to a pair of wing portions in an absorbent article having a substantially vertically long absorbent main body having an absorbent layer and a leak-proof layer and a pair of wing portions extending from both side edges of the absorbent main body. A method for producing an individual package of the absorbent article, wherein a pair of release papers are detachably joined to the non-skin contact surface side through an adhesive, respectively, and each package is individually packaged. Under a state where the wing portion is extended outward in the width direction of the absorbent main body, a pair of rolls are used to a pair of non-skin contact surface sides of the wing portion via the adhesive. After the release paper joining step for releasably joining the release paper and the release paper joining step, the ends of the pair of wing portions face inward in the width direction of the absorbent main body, and each of the pair of release papers One so as to have an overlapping portion at the center in the width direction of the absorbent main body. A method for manufacturing an individual package for an absorbent article, comprising: folding back the wing portion to the skin contact surface side of the absorbent main body and joining the overlapping portions of the pair of release papers to each other. This achieves the object.

  In addition, the present invention provides a pair of wings in an absorbent article having a substantially vertically long absorbent main body having an absorbent layer and a leak-proof layer and a pair of wing portions extending from both side edges of the absorbent main body. A pair of release papers are detachably joined to the non-skin contact surface side of each part via an adhesive, and the absorbent article is individually packaged with a packaging material, the pair of the peeling The pair of the wing portions to which the paper is bonded have a portion in which the leading ends thereof are directed inward in the width direction of the absorbent main body, and the pair of release papers overlap each other in the center portion in the width direction. Folded to the skin contact surface side, the overlapping portions of the pair of release papers are joined to each other, and the packaging material has left and right side edges and front and rear edges, both side edges and front and rear sides of the absorbent main body. It extends outward from the edge, and the absorbent article is Folded on the skin contact surface side with the packaging material so that the release paper and the inner surface of the portion of the packaging material that extends outward from one end in the longitudinal direction of the absorbent material face each other. The individual package of the absorbent article in which the inner surface of the part and the release paper are joined is provided.

  According to the method for manufacturing an absorbent article individual package according to the present invention, the adhesive can be reliably transferred to a pair of wing parts, and the absorbent article individual package can be easily treated with release paper at the time of use. Can be efficiently manufactured.

FIG. 1 is a perspective view showing an individual package of an absorbent article according to an embodiment of the present invention. 2 is a cross-sectional view taken along line XX of FIG. FIG. 3 is a plan view showing a state where the wing portion of the sanitary napkin of FIG. 1 is opened. 4 is a cross-sectional view taken along line YY of FIG. FIG. 5 is a plan view showing a state where the individual package of FIG. 1 is developed. FIG. 6 is a perspective view for explaining the outline of all the steps of an embodiment of the method for producing an individual package of absorbent articles according to the present invention. FIG. 7 is a longitudinal sectional view showing the release paper pressing mechanism in FIG. FIG. 8 is a cross-sectional view of the sanitary napkin taken along the line ZZ in FIG. FIG. 9 is a diagram for explaining a further preferred embodiment of the method for producing an individual package of absorbent articles according to the present invention. FIG. 10 is a diagram (corresponding to FIG. 7) showing another example of the release paper pressing mechanism. FIG. 11 is a schematic cross-sectional view showing the absorbent article after the folding joining step in still another embodiment of the present invention. FIG. 12 is a schematic cross-sectional view showing the absorbent article after the folding joining step in still another embodiment of the present invention. FIG. 13: is a figure which shows the other embodiment of this invention, (a) is a top view which shows the absorbent article after a release paper joining process, (b) is an absorbent article after a return | turnback joining process. It is a figure shown, (c) is the IV-IV line | wire schematic sectional drawing of (b). FIG. 14 is a schematic cross-sectional view showing an absorbent article before the release paper joining step in still another embodiment of the present invention. FIG. 15 is a schematic cross-sectional view showing an absorbent article before the release paper bonding step in still another embodiment of the present invention. FIG. 16 is a schematic cross-sectional view showing an absorbent article before the release paper joining step in still another embodiment of the present invention. FIG. 17 is a schematic cross-sectional view showing an absorbent article before the release paper bonding step in still another embodiment of the present invention.

Hereinafter, the manufacturing method of the individual package of the absorbent article of this invention is demonstrated, referring drawings based on the preferable one embodiment.
The manufacturing method of the present invention includes a substantially vertically long absorbent main body 4 having an absorbent layer 11 and a leak-proof layer 12 and a pair of wing portions 8 and 8 extending from both side edges of the absorbent main body 4. A pair of release papers 3 and 3 are releasably joined to the non-skin contact surface side of the pair of wings 8 and 8 in the absorbent article 10 via an adhesive M1, respectively, and are individually packaged with the packaging material 2. Further, it is a method of manufacturing the individual package 1 of the absorbent article.
The individual package 1 shown in FIGS. 1 to 4 shows a preferred form of the individual package of the absorbent article that is the object of manufacture in the manufacturing method of the present invention, and the sanitary napkin 10 is an individual packaging material 2. It is a disguise.
As shown in FIGS. 3 and 4, the sanitary napkin 10 to be individually packaged includes a substantially vertically long absorbent body 4 having an absorbent layer 11 and a leak-proof layer, and side edges of the absorbent body 4. It has a pair of extended wings 8,8.

As shown in FIG. 4, the absorbent layer 11 is mainly composed of a liquid-permeable surface sheet 5 and a liquid-retaining absorbent body 7. The leak-proof layer 12 is mainly composed of a liquid-impermeable or liquid-impermeable back sheet 6. The top sheet 5 and the back sheet 6 cover the entire skin contact surface side and non-skin contact surface side of the absorbent body 7, respectively.
In the both sides in the longitudinal direction of the absorbent main body 4 of the present embodiment, as shown in FIG. 4, the top sheet 5 and the back sheet 6 respectively extend outward in the width direction from the both sides of the absorbent body 7. The sheet 5 and the back sheet 6 are bonded to each other by a known bonding method such as heat sealing at the extended portion.

Both end portions in the longitudinal direction of the top sheet 5 and the back sheet 6 are respectively extended from both ends in the longitudinal direction of the absorber 7 and joined by a known joining method such as heat sealing.
Although not shown in the drawings, an adhesive for fixing the absorbent article to the underwear when worn (hereinafter also referred to as a main body fixing adhesive) is applied to the non-skin contact surface side of the back sheet 6. .

As shown in FIG. 3, the pair of wing portions 8, 8 are arranged in the center portion in the longitudinal direction of the absorbent main body 4, and extend outward in the width direction from both side edges of the absorbent main body 4. In the present embodiment, as shown in FIG. 4, the pair of wing portions 8, 8 is configured mainly with a wing portion forming sheet 81, and the wing portion forming sheet 81 is a skin contact surface of the top sheet 5. It is joined to the side.
A pair of release papers 3 and 3 are detachably joined to the non-skin contact surface side of the pair of wing portions 8 and 8 via an adhesive M1, respectively.
The non-skin contact surface of the wing part 8 is a state in which the pair of wing parts 8 and 8 are extended outward in the width direction of the absorbent body 4 as shown in FIG. The surface facing the same side as the skin contact surface.

As shown in FIGS. 3 and 4, the pair of release papers 3, 3 cover the central region in the longitudinal direction of the pair of wing portions 8, 8 over the entire width direction, and the pair of wing portions 8, 8. It extends outward in the width direction from both side edges. A length L4 (see FIG. 4) of a portion (hereinafter also referred to as an extended end) extending from the side edge of the wing portion 8 in the release paper 3 is different between the one release paper 3A and the other release paper 3B. Yes. In the present embodiment, the length of the extended end of one release paper 3A is longer than the length of the extended end of the other release paper 3B.
As shown in FIG. 5, the pair of wing portions 8, 8 to which the pair of release papers 3, 3 are joined has their tips 82, 82 facing inward in the width direction of the absorbent main body 4 and a pair of release Each of the papers 3 and 3 is folded back to the topsheet 5 side so as to have a portion 83 that overlaps at the center in the width direction of the absorbent main body 4. And the part 83 where a pair of release papers 3 and 3 overlap is mutually joined. The pair of release papers 3 and 3 are bonded to each other through the adhesive M2 so as not to be peeled off. “Unpeelable” means that the film is not peeled by a force that is normally pulled by hand.
The length L5 (see FIG. 5) of the overlapping portion 83 in the width direction is preferably 2 to 20 mm, more preferably 5 to 15 mm, from the viewpoint of sufficiently joining the pair of release papers 3 and 3 together.

As shown in FIG. 5, the packaging material 2 is formed in a vertically long shape when the individual package 1 is unfolded. Specifically, the packaging material 2 has a rectangular shape having a long side in the same direction as the longitudinal direction of the sanitary napkin 10. It is. The left and right side edges and the front and rear edges of the packaging material 2 extend outward from the both sides and front and rear edges of the absorbent main body 4.
The sanitary napkin 10 is disposed so as to be positioned at the approximate center of the packaging material 2. The sanitary napkin 10 and the packaging material 2 are detachably joined via a main body fixing adhesive applied to the non-skin contact surface side of the back sheet 6 of the sanitary napkin 10.

As shown in FIGS. 2 and 5, the individual package 1 is outward from the non-coated surface of the adhesive M <b> 1 in the pair of release papers 3 and 3 and the longitudinal end 4 a of the sanitary napkin 10 in the packaging material 2. It is folded in three on the top sheet 5 side so that the inner surface of the portion extending to the top face is opposed. As shown in FIG. 2, the inner surface of the portion of the packaging material 2 and the non-coated surface of the adhesive M1 in the pair of release papers 3 and 3 are joined to each other through an adhesive M3.
In the present embodiment, the release paper 3A located on the upper surface side of the pair of release papers 3 and 3 and the inner surface of the portion of the packaging material 2 are joined.
The three-folded individual package 1 is fixed by a tab tape 9 disposed at the end of the packaging material 2 that covers the other end 4b of the sanitary napkin 1 in the longitudinal direction.
Sealing is applied to both side edges of the packaging material 2 in the three-folded individual package 1, and the folded packaging materials 2 are joined to each other.

As the top sheet 5, the back sheet 6 and the absorbent body 7 constituting the sanitary napkin 10, those conventionally used for absorbent articles such as sanitary napkins and panty liners can be used without particular limitation.
As the surface sheet 5, for example, a nonwoven fabric, an apertured film, or a laminate of these by various manufacturing methods can be used.
As the back sheet 6, for example, a polyethylene film, a polypropylene film, or a polyester film can be used.
As the absorbent body 6, for example, a fiber aggregate such as pulp fiber or a combination of this and an absorbent polymer can be used.

  As the wing portion forming sheet 81, various sheet materials used for this type of absorbent article can be used without limitation. For example, a bulky nonwoven fabric or a stretchable nonwoven fabric can be preferably used.

  As the release paper 3, a substrate sheet made of paper, a resin film, or the like that has been subjected to a release treatment on one or both sides thereof can be used. Examples of the peeling treatment include a method in which a silicone resin-based material is applied and heat-dried or ultraviolet-treated, and a spray coating or a method of forming a thin film with various coaters.

  As the packaging material 2, various sheet materials conventionally used as packaging materials in individual packages of absorbent articles such as sanitary napkins and panty liners can be preferably used. For example, a resin film made of a resin such as polypropylene, low-density polyethylene, or polyvinyl alcohol, or a nonwoven fabric or paper produced by various manufacturing methods, a composite material thereof, or the like can be used.

  As the pressure-sensitive adhesive M1, various pressure-sensitive adhesives used for forming a pressure-sensitive adhesive part such as a pressure-sensitive adhesive part for preventing slippage of absorbent articles such as sanitary napkins and panty liners can be used without particular limitation. Examples thereof include styrene-butadiene copolymers and styrene-isoprene copolymers. As the adhesives M2 and M3, various adhesives conventionally used for bonding between sheets in absorbent articles such as sanitary napkins and panty liners can be used without particular limitation.

Next, the manufacturing method of the individual package of the absorbent article of this invention is demonstrated with reference to FIGS. 6-8 based on the embodiment which manufactures the individual package 1 mentioned above.
The individual package 1 of the sanitary napkin 10 in this embodiment is manufactured according to the following steps shown in P1 to P5.

(1) Release paper forming step P1: An individual release paper 3 is formed from the original release paper 30.
(2) Release paper joining step P2: Non-skin of the pair of wings 8 and 8 in a state where the pair of wings 8 and 8 of the sanitary napkin 10 are extended outward in the width direction of the absorbent main body 4 A pair of release papers 3 and 3 are detachably joined to the contact surface side via an adhesive M1.
(3) Folding and joining step P3: The ends 82 and 82 of the pair of wings 8 and 8 are directed inward in the width direction of the absorbent main body 4, and the pair of release papers 3 and 3 are respectively the center in the width direction of the absorbent main body 4. The pair of wing portions 8 and 8 are folded back to the skin contact surface side of the absorbent main body 4 so as to have the overlapping portion 83 in the portion, and the portion 83 where the pair of release papers 3 and 3 overlap is joined to each other.
(4) Lamination process P4: The sanitary napkin 10 is rotated 90 degrees horizontally with respect to the feeding direction, and laminated on the continuous sheet 20 of the packaging material.
(5) Individual fold joining step P5: The laminated body of the laminated sanitary napkin 10 and the continuous sheet 20 of the packaging material is combined with the sanitary napkin 10 in the pair of release papers 3 and 3 and the continuous sheet 20 of the packaging material. The laminate is folded to the skin contact surface side so that the inner surface of the portion extending from one end 4a in the longitudinal direction is opposed, and the inner surface of the portion and the release paper 3 are joined.

  Hereinafter, each process of P1-P5 is explained in full detail.

(1) Release paper forming process P1
In the release paper joining step P1, as shown in FIG. 6, first, the release paper original fabric 30 is fed out. The unfolded release paper original 30 is cut at a predetermined position in the width direction of the release paper original 30 by the release paper cutter 60 to obtain a pair of release paper continuous bodies 31A and 31B.
Here, the original release paper 30 is cut so that the width of one release paper continuous body 31A in the pair of release paper continuous bodies 31A and 31B is larger than the width of the other release paper continuous body 31B. .

Next, the pair of release paper continuous bodies 31A and 31B are separated from each other by a position adjusting mechanism (not shown) and run parallel to each other in the same direction with a predetermined interval.
The adhesive M1 is applied by the adhesive discharger 61 to the pair of release paper continuous bodies 31A and 31B that travel with a predetermined interval. The adhesive dispenser 61 is configured to eject and apply an adhesive at a predetermined interval on a predetermined position on one surface of the pair of release paper continuous bodies 31A and 31B.

  The pair of release paper continuous bodies 31 </ b> A and 31 </ b> B is then introduced into the release paper separating mechanism 62. As shown in FIG. 6, the release paper separating mechanism 62 includes a cutter roll 62A and an anvil roll 62B. The anvil roll 62B is disposed at a position facing the cutter roll 62A with the pair of release paper continuous bodies 31A and 31B interposed therebetween. Therefore, in the release paper separating mechanism 62, when the pair of release paper continuous bodies 31A and 31B pass between the cutter roll 62A and the anvil roll 62B, the pair of release paper continuous bodies 31A and 31B are predetermined along the width direction. A pair of release papers 3 and 3 are formed by being cut linearly at intervals. In the release paper separating mechanism 62, the pair of release paper continuous bodies 31A and 31B is configured to be cut at a portion where the adhesive M1 is not applied in the longitudinal direction.

(2) Release paper joining process P2
In the release paper joining step P <b> 2, as shown in FIG. 6, the pair of release papers 3 and 3 are introduced into the release paper pressing mechanism 63. The release paper pressing mechanism 63 includes a backup roll 63A and an anvil roll 62B. The anvil roll 62B constitutes a part of the release paper separating mechanism 62 in the release paper forming process P1, and also constitutes a part of the release paper pressing mechanism 63 in the release paper joining process P2. The backup roll 63A is disposed at a position facing the anvil roll 62B with the sanitary napkin 10 interposed therebetween.
The backup roll 63A presses the release paper 3 with the wing portion 8 and the adhesive M1 between the anvil roll 62B.
As shown in FIG. 7, the backup roll 63 </ b> A and the anvil roll 62 </ b> B are configured such that at least one of the outer diameters at the center part is smaller than the outer diameters at both side parts.

  As shown in FIG. 6, the pair of release papers 3 and 3 are physiologically provided with a pair of wing portions 8 and 8 conveyed by a conveyance mechanism (not shown) while being held on the peripheral surface of the anvil roll 62B. It overlaps with a pair of wing parts 8 and 8 in the napkin 10 for use. Here, the adhesive coated surface of the release paper 3 and the non-skin contact surface of the wing portion 8 are overlaid so as to face each other. The sanitary napkin 10 is supplied with the pair of wings 8 and 8 extending outward in the width direction of the absorbent main body 4 with the skin contact surface facing upward and the longitudinal direction thereof as the transport direction. Yes.

In the release paper pressing mechanism 63, as shown in FIG. 7, the pair of wing portions 8 and 8 and the pair of release papers 3 and 3 in the sanitary napkin 10 have a narrow pressure between the backup roll 63A and the anvil roll 62B. Is done. Then, the adhesive M1 applied to the pair of release papers 3 and 3 is transferred to the non-skin contact surface side of the pair of wing parts 8 and 8, and the pair of wing parts 8 and 8 and the pair of release papers 3 are transferred. , 3 are joined.
Here, the absorptive main body 4 is sandwiched between the rolls 63A and 62B at the center of the backup roll 63A and the anvil roll 62B. In the backup roll 63A and the anvil roll 62B, at least one of the center diameters of the rolls is smaller than the outer diameters of both sides, and the pressure applied to the absorbent main body 4 in the release paper pressing mechanism 63 is as follows. The pressure applied to the laminated body of the wing portion 8 and the release paper 3 is smaller.
As shown in FIG. 7, the pair of release papers 3, 3 are joined so that their side edges have extended ends extending outward in the width direction from the side edges of the pair of wing portions 8, 8. The

The width L1 of the central portion of the backup roll 63A and / or anvil roll 62B is preferably the same as or slightly wider than the width of the absorbent main body 4, as shown in FIG. Moreover, it is preferable that the width L2 of both sides is substantially the same as the width of the pair of wing portions 8, 8. Specifically, the width L1 of the central portion is preferably 50 to 120 mm, more preferably 70 to 100 mm. The width L2 of both sides is preferably 20 to 60 mm, and more preferably 30 to 50 mm.
Further, the difference L3 between the outer diameter of the central portion and the outer diameter of both side portions of the backup roll 63A and / or the anvil roll 62B (the step generated at the boundary portion between the central portion and both side portions, see FIG. 7) From the viewpoint of reducing the pressure applied to the absorbent main body 4 in the mechanism 63, it is preferably 1 to 20 mm, more preferably 3 to 10 mm.

(3) Folding joining process P3
In the folded joining process P3, first, as shown in FIG. 6, an adhesive applicator (not shown) is used to form a part extending outward in the width direction from the wing part 8 in one release paper 3A. Adhesive M2 is applied. The adhesive M2 is configured to be applied to the application surface side of the adhesive M1 in the release paper 3A.
The sanitary napkin 10 coated with the adhesive M2 is then introduced into a wing folding mechanism (not shown). In the wing portion folding mechanism, as shown in FIG. 6, the pair of wing portions 8 and 8 have their tips 82 and 82 facing inward in the width direction of the absorbent main body 4 and a pair of release papers 3 and 3, respectively. Is folded back to have an overlapping portion 83 at the widthwise center of the absorbent main body 4.

  In the wing portion folding mechanism, the pair of wing portions 8 and 8 are folded substantially simultaneously, but the wing portion 8 to which the other release paper 3B is joined is folded back to the wing portion 8 to which one release paper 3A is joined. It starts slightly earlier and finishes slightly earlier than the turnaround. Therefore, in a state where the wings 8 and 8 have been folded back, as shown in FIG. 8, the leading end of one release paper 3A is overlapped with the leading end of the other release paper 3B.

As shown in FIG. 8, the sanitary napkin 10 that has undergone the folding joining step P3 is joined to the pair of release papers 3 and 3 so as not to be peeled from each other via an adhesive M2 applied to one release paper 3A. Thus, the folded state of the pair of wing portions 8 and 8 is maintained.
In this embodiment, in order to join the pair of release papers 3 and 3 together so as not to be peeled, the region to which the adhesive M2 of the release paper 3A is applied is not peeled.
Note that the release paper 3A and the release paper 3B are not subjected to the release treatment on the entire area of the surface opposite to the surface on the adhesive M1 side (the upper surface in FIG. 8). Further, the surface on the adhesive M1 side of the release paper 3A is peeled except for the portion overlapped with the release paper 3B, and the entire surface of the surface on the adhesive M1 side of the release paper 3B is peeled off. .

(4) Lamination process P4
In the stacking step P4, as shown in FIG. 6, the sanitary napkin 10 is horizontally rotated 90 degrees with respect to the feeding direction by a rotating mechanism (not shown). By being rotated horizontally, the longitudinal direction of the sanitary napkin 10 and the width direction of the continuous sheet 20 of packaging material coincide. The width of the continuous sheet 20 of the packaging material is set wider than the length of the sanitary napkin 10 in the longitudinal direction.

As shown in FIG. 6, an adhesive M3 is applied to one surface of one end in the width direction of the continuous sheet 20 of the packaging material with an adhesive applicator (not shown) at a predetermined interval.
A body fixing adhesive M4 is applied in a predetermined pattern by an adhesive dispenser (not shown) in a region where the sanitary napkin 10 on the coated surface of the adhesive M3 in the continuous sheet 20 of the packaging material is laminated. The
The sanitary napkin 10 is laminated on the continuous sheet 20 of the packaging material coated with the main body fixing adhesive and the adhesive M3. The sanitary napkin 10 and the continuous sheet 20 of packaging material are joined to each other through a main body fixing adhesive so as to be peeled off.

(5) Individual fold joining process P5
In the individual folding joint process P5, as shown in FIG. 6, in a state where the sanitary napkin 10 is overlapped with the continuous sheet 20 of the packaging material, the pair of release papers 3 and 3 and the physiological in the continuous sheet 20 of the packaging material The sanitary napkin 10 is folded to the skin contact surface side together with the continuous sheet 20 of the packaging material so that the inner surface of the portion extending from the longitudinal end 4a of the medical napkin 10 faces.
The continuous sheet 20 of the packaging material folded and opposed to the pair of release papers 3 and 3 are joined via an adhesive M3 applied to one end 4a of the continuous sheet 20 of the packaging material. Here, the continuous sheet 20 of the packaging material is joined to only one of the pair of release papers 3 and 3 so as not to be peeled off.

  The continuous body of individual packages formed through the individual packaging and joining step P5 is conveyed to subsequent processes such as sealing a predetermined portion of the continuous sheet 20 of the packaging material and cutting into individual packages 1. The individual package 1 of the sanitary napkin described above is manufactured through these subsequent steps.

  According to the manufacturing method of the individual package of the sanitary napkin 10 of the present embodiment, in the state where the pair of wing portions 8, 8 are extended outward in the width direction of the absorbent main body 4, 3 and the pair of release papers 3, 3 disposed on the pair of wings 8, 8 are joined together so as not to be peeled off, so that the adhesive M1 is securely attached to the pair of wings 8, 8. Thus, it is possible to efficiently produce an individual package of an absorbent article that can be easily transferred to a release paper and can be easily treated with release paper.

  The backup roll 63A and the anvil roll 62B are configured such that at least one of the center diameters of the backup roll 63A and the anvil roll 62B is smaller than the outer diameters of both sides, so that the wing pressing mechanism 63 is thicker than the absorbent main body 4. A strong pressure can be applied to the laminate of the pair of thin wings 8, 8 and the pair of release papers 3, 3, and the transferability of the adhesive M1 to the pair of wings 8, 8 is further improved. . Furthermore, in the wing pressing mechanism 63, since the pressure applied to the absorbent main body 4 is small, the absorber 7 can be prevented from being crushed and cured.

  It is preferable that the anvil roll 62B be heated. For example, a known heating means (such as a heater using a heating wire) is incorporated into the anvil roll 62B and heated. By heating the anvil roll 62B, the temperature of the adhesive M1 applied to the release papers 3A and 3B can be prevented from decreasing on the peripheral surface of the anvil roll 62B, and the transfer of the adhesive M1 to the wing part 3 can be prevented. Can be improved.

Moreover, the sanitary napkin 10 supplied to the release paper joining step P2 includes, for example, a napkin continuous body 100 having a configuration in which the sanitary napkin 10 is continuous in the longitudinal direction, as shown in FIG. ) After the sanitary napkin 10 is cut by 64, the pair of wing parts 8, 8, until the release papers 3 A and 3 B are joined to the wing parts 3 and 3 of the napkin 10 by the release paper pressing mechanism 63 and the like. The pair of wings 8 and 8 that extend 8 outward in the width direction of the absorbent main body 4 and are extended can be conveyed while maintaining the extended state by the suction means provided in the conveying means. preferable.
By maintaining a state where the pair of wings 8 and 8 are expanded to the left and right by the suction means provided in the conveying means, and joining the release papers 3 and 3 with the adhesive M1 to the wings 8 and 8 in that state, The adhesive M1 can be accurately placed at a predetermined design position where the adhesive M1 is to be placed. In particular, when the wing portion is formed from a soft non-woven fabric, the folding position is not stable, and the transfer position of the adhesive after folding is likely to be shifted. However, such a disadvantage is caused by supplying the sanitary napkin 10 as described above. Can be prevented.

  In the embodiment shown in FIG. 9, each sanitary napkin is cut by cutting the napkin continuous body 100 by the continuous body cutting mechanism (external cutter) 64 including the cutter roll 64 </ b> A and the anvil roll 64 </ b> B having a suction holding function. 10, the sanitary napkin 10 is sucked and held on the peripheral surface by sucking the wing portions 8 and 8 from a large number of suction holes opened on the peripheral surface of the anvil roll 64 </ b> B. It is transported to the delivery position. The transfer roll 65 also has a suction holding function, and the sanitary napkin 10 delivered from the anvil roll 64B is sucked through the numerous suction holes that open to the peripheral surfaces of the wing portions 8 and 8, respectively. In this state, it is conveyed to the delivery position to the vacuum conveyor 66 while being sucked and held on the peripheral surface. Further, the vacuum conveyor 66 also has a suction holding function. The sanitary napkin 10 delivered from the transfer roll has a number of suction openings that open the wing portions 8 and 8 to the napkin mounting surface of the endless belt. While being sucked from the hole and sucked and held on the placement surface, the sheet is conveyed to the joining position of the release sheets 3A and 3B.

As in the embodiment shown in FIG. 6 described above, the release papers 3A and 3B are joined between the anvil roll 62B and the backup roll 63A, and the release papers 3A and 3B coated with the adhesive M1 and the wing portion 8. , 8 is applied under pressure, and the backup roll 63A also has a suction hole on the outer peripheral surface, and can hold the expanded wing portion by suction on the outer peripheral surface. It is preferable from the viewpoint of arranging at the design position.
Further, the backup roll 63A having a diameter larger than that of the anvil roll 62B may be used so that the suction holding state of the wing portions 8 and 8 is not released in the delivery to the front and rear conveyors 66 and 67 (conveying means). It is preferable because the wings 8 and 8 can be prevented from being bent and wrinkles can be prevented from occurring.
In FIG. 9, reference numeral 67 denotes a wing part folding device for folding the wing parts 8 and 8. Moreover, the point which is not demonstrated especially about the embodiment shown in FIG. 9 applies suitably the description mentioned above about the embodiment shown in FIG.

In addition, the backup roll 63A and the anvil roll 62B shown in FIG. 7 have large-diameter portions whose outer diameters are larger than the central portions of the both side portions (both end portions in the axial length direction). As shown in FIG. 10, the backup roll 63A and the anvil roll 62B used to join the release papers 3 and 3 to the wing portions 8 and 8 respectively have release papers in the respective axial length directions (left and right directions in FIG. 10). It is preferable to have large-diameter portions 63A ′, 63A ′, 62B ′, and 62B ′ having substantially the same width (width indicated by L2 in FIG. 9) as the width L6 of the adhesive M1 applied to 3A and 3B. The preferred height (size) of the step L3 generated at the boundary between the large diameter portions 63A ′, 63A ′, 62B ′, 62B ′ and the other portions (small diameter portions) is the same as in the embodiment shown in FIG. is there.
In addition, large diameter part 63A ', 63A', 62B ', 62B' may be formed continuously in the circumferential direction of both rolls, and may be formed intermittently.

  By joining release paper using such rolls 63A and 62B, the soft portion of the wing part (nonwoven fabric, etc.) is soft, and the root part of the wing part that contacts the body and the tip part that the person handles Can be maintained, and the portion where the pressure-sensitive adhesive M1 exists can be strongly pressed by the large-diameter portion, and the transferability of the pressure-sensitive adhesive M1 to the wing portion 8 can be improved. The width L2 of the large diameter portions 63A ′, 63A ′, 62B ′, and 62B ′ in the roll axial direction is 4 to 20 mm (2 to 10 mm × 2 on one side) in the width L6 of the adhesive M1 in the roll axial direction. The added width is preferable.

  According to the sanitary napkin individual packaging 1 of the present embodiment obtained by the manufacturing method of the present invention, a pair of release papers 3 disposed on a pair of wings 8, 8 folded back to the top sheet 5 side. 3 are joined together so as not to be peeled, and the release paper 3 and the inner surface of one end 4a in the longitudinal direction of the packaging material 2 are joined together so as not to be peeled off. Can be peeled off, and the treatment of the release paper 3 is not necessary when the sanitary napkin 10 is used.

  Further, since the pair of release papers 3 and 3 are joined so as not to be peeled off, only one release paper 3 is joined to the inner surface of one end 4a in the longitudinal direction of the packaging material 2 to open the individual package 1. At the same time, the release paper 3 covering the wing portion 8 can be peeled off.

  In the individual packaging of the absorbent article of the present invention, as in the absorbent article 10 shown in FIG. 11, the adhesive M1 in the wing portions 8 and 8 folded back on the absorbent main body 4 is respectively an absorbent body. 7 may overlap with the leak-proof grooves 71 and 71 formed in 7. In the conventional method in which the release paper is joined to the wing portion after the wing portion is bent, when the portion where the adhesive M1 is to be disposed is on the leak-proof groove 71, the adhesive M1 is sufficiently applied to the wing portion 8. It may not be transcribed. On the other hand, such a problem does not occur when the release papers 3 and 3 with the adhesive M1 are joined to the wing portion 8 before being folded back as in the method of the present invention. The pair of leak-proof grooves 71 in the absorbent article shown in FIG. 11 are formed to extend in the longitudinal direction of the absorbent body 7 at positions spaced from both side edges in the longitudinal direction of the absorbent body 7. The leak-proof groove 71 is formed by embossing the top sheet 5 and the absorbent body 7 in the laminated state.

Moreover, in the individual packaging of the absorbent article of the present invention, as in the absorbent article 10 shown in FIG. 12, the thickness of the absorbent body 7 at the center portion in the width direction of the absorbent article is The stepped portion 72 which is thicker than the thickness of the absorbent body 7 (so-called medium-high absorbent body) and the adhesive M1 in the wing portions 8 and 8 folded on the absorbent main body 4 overlap. It does not matter.
In the conventional method in which the release paper is joined to the wing portion after the wing portion is bent, the adhesive M1 is sufficiently transferred to the wing portion 8 when the portion where the adhesive M1 is to be disposed is on the stepped portion 72. May not be. On the other hand, such a problem does not occur when the release papers 3 and 3 with the adhesive M1 are joined to the wing portion 8 before being folded back as in the method of the present invention.

  Further, as shown in FIG. 13, the individual package of the absorbent article according to the present invention has the folding positions 8B and 8B of the pair of wing portions 8 and 8 of the absorbent article 10 and the absorbency in the release papers 3 and 3. It is preferable that the positions of the side edges 32, 32 near the center of the article width direction substantially coincide with each other. With such a configuration, even when a soft nonwoven fabric or the like is used as the wing part forming material, the rigidity of the wing part is improved, and the one side edge 32, 32 becomes the starting point of folding, and the wing part can be easily folded. The dimensional accuracy of the folding width is improved.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the width of one release paper 3A is different from the width of the other release paper 3B, but the widths of both may be equal.

Further, the packaging material 2 is joined only to one release paper 3A of the pair of release papers 3 and 3, but the packaging material 2 may be joined only to the other release paper 3B. The release papers 3 and 3 may be joined together.
Further, the pair of release papers 3 and 3 may be joined by heat sealing or ultrasonic sealing. The joining of the release paper 3 and the packaging material 2 may also be joining by heat sealing or ultrasonic sealing.

In the above-described embodiment, the pair of release papers 3A and 3B are joined to the area where the adhesive M2 of the release paper 3A is applied without performing the release process, but the pair of release papers 3A and 3B is joined. May be joined in a peelable manner. For example, a peeling process may be performed on the entire area of the release paper 3A on the adhesive M1 side.
In the present embodiment, the pair of wing portions 8, 8 are formed by the wing portion forming sheet 81, but the pair of wing portions 8, 8 are provided on both sides of the absorbent main body 4 with the topsheet 5 and the backsheet 6. It may be formed by extending outward in the width direction.

Moreover, the thing of a structure as shown in FIGS. 14-17 may be sufficient as the wing part 8. FIG.
The wing portion 8 in the absorbent article shown in FIG. 14 extends the top sheet 5 and the back sheet 6 outward from both side edges in the longitudinal direction of the absorbent body 7, and between the extended portions of both sheets 5 and 6. The wing portion forming sheet 81 is fixed and formed. The wing portion shown in FIG. 14 is firmly fixed because the wing forming sheet 81 is fixed between the both sheets 5 and 6, and the both side edges in the longitudinal direction of the surface sheet 5 serve as the wing folding base, and the folding dimension is Easy to stabilize.

The wing portion 8 in the absorbent article shown in FIG. 15 is formed by bonding a wing portion forming sheet 81 to the non-skin contact surface side (clothing contact surface side) of the back sheet 6. In the wing part shown in FIG. 15, both side edges in the longitudinal direction of the top sheet 5 and the back sheet 6 become the base points of the wing folding, and the fold dimensions are likely to be stable.
The wing portion 8 in the absorbent article shown in FIG. 16 is formed by extending only the top sheet 5 from both side portions of the absorbent main body 4 outward in the width direction.
The wing portion shown in FIG. 16 only needs to prepare a wide topsheet 5 and does not require equipment costs for the wing forming sheet 81.

  Moreover, the wing part 8 in the absorbent article shown in FIG. 17 extends the back sheet 6 outward from both side edges in the longitudinal direction of the absorbent body 7, and the extended portion of the back sheet 6 and one of the top sheets 5. The wing part forming sheet 81 is joined to the part. By using such a configuration, the amount of the top sheet 5 used can be minimized.

  Further, the cutting of the release paper is not limited to a linear shape, and may be a V shape, a U shape, a wave shape, or the like.

The absorbent article according to the individual package of the absorbent article of the present invention is not limited to a sanitary napkin, and may be a panty liner (orimono sheet), an incontinence pad, or the like.
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

DESCRIPTION OF SYMBOLS 1 Individual packaging 2 Packaging material 20 Continuous sheet of packaging material 3 Release paper 30 Release paper original fabric 31A, 31B Release paper continuous body 4 Absorbent main body 5 Top sheet 6 Back sheet 7 Absorber 8 Wing part 81 Wing part formation sheet 82 Tip 83 Overlapping part 9 Tab tape 10 Absorbent article (Sanitary napkin)
11 Absorbent layer 12 Leak-proof layer

Claims (6)

Non-skin contact of a pair of wing portions in an absorbent article having a substantially vertically long absorbent body having an absorbent layer and a leak-proof layer and a pair of wing portions extending from both side edges of the absorbent body A pair of release papers are detachably joined to the surface side via an adhesive, respectively, and the absorbent article individually packaged with a packaging material,
The wing part is mainly composed of a wing part forming sheet made of a nonwoven fabric,
The pair of the wing portions to which the pair of release papers are joined have their ends facing inward in the width direction of the absorbent main body and a pair of the release papers overlapping each other in the center in the width direction. Folded to the skin contact surface side of the absorbent main body, the overlapping portions of the pair of release papers are joined together,
The packaging material has left and right side edges and front and rear edges extending outward from both side edges and front and rear edges of the absorbent main body,
The absorbent article is on the skin contact surface side with the packaging material such that the release paper and the inner surface of the portion of the packaging material that extends outward from one longitudinal end of the absorbent article face each other. Is folded and
The inner surface of the portion in the packaging material and the release paper are joined ,
A leakproof groove is formed in the absorbent layer, and the adhesive on the non-skin contact surface side of the pair of wing portions in a folded state on the absorbent main body is respectively the leakproof groove of the absorbent layer. Absorbent article individual package that overlaps . Non-skin contact of a pair of wing portions in an absorbent article having a substantially vertically long absorbent body having an absorbent layer and a leak-proof layer and a pair of wing portions extending from both side edges of the absorbent body A pair of release papers are detachably joined to the surface side via an adhesive, respectively, and the absorbent article individually packaged with a packaging material,
The wing part is mainly composed of a wing part forming sheet made of a nonwoven fabric,
The pair of the wing portions to which the pair of release papers are joined have their ends facing inward in the width direction of the absorbent main body and a pair of the release papers overlapping each other in the center in the width direction. Folded to the skin contact surface side of the absorbent main body, the overlapping portions of the pair of release papers are joined together,
The packaging material has left and right side edges and front and rear edges extending outward from both side edges and front and rear edges of the absorbent main body,
The absorbent article is on the skin contact surface side with the packaging material such that the release paper and the inner surface of the portion of the packaging material that extends outward from one longitudinal end of the absorbent article face each other. Is folded and
The inner surface of the portion in the packaging material and the release paper are joined,
The absorbent layer includes an absorbent body, and the absorbent body has a thickness in a central portion in the width direction of the absorbent main body that is larger than thicknesses at both end portions in the width direction, and is generated between the two. A package of absorbent articles in which the stepped portion and the adhesive in the pair of wing portions folded back on the absorbent main body overlap. The individual packaging of the absorbent article according to claim 1 or 2, wherein an inner surface of the portion of the packaging material is bonded to one of the pair of release papers. The individual packaging of the absorbent article according to any one of claims 1 to 3 , wherein the overlapping portions of the pair of release papers are joined together with an adhesive so as not to be peeled off. Each the folded position the pair of wing portions, each pair of the release paper, claim 1 any one of the 4 in which the position of one side edge of the side far from the site joined together substantially matches KoSokarada absorbent article according to. The pair of wing portions are joined to the pair of release papers in a state of extending outward in the width direction of the absorbent main body, and thereafter, the pair of wing portions is paired with the pair of release papers. is folded on the skin-contacting side of the absorbent body so as to have a portion overlapping the portion where the pair of the release paper are overlapped are joined to each other, the absorbent according to any one of claims 1 to 5 Individual packaging of goods.

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