WO2008069137A1

WO2008069137A1 - Absorbent article

Info

Publication number: WO2008069137A1
Application number: PCT/JP2007/073203
Authority: WO
Inventors: Iwao Goto
Original assignee: Daio Paper Corporation
Priority date: 2006-11-30
Filing date: 2007-11-30
Publication date: 2008-06-12
Also published as: JP2008136565A; JP4912846B2

Abstract

[PROBLEMS] To provide an absorbent article that has a winglike flap and, in the state of being individually packaged, has the winglike flap doubled over, and that is designed so that no pressure sensitive adhesive layer is present on the surface of the winglike flap on its side of front face sheet when the winglike flap is folded onto the side of front face sheet and temporarily fixed. [MEANS FOR SOLVING PROBLEMS] In the state of product being individually packaged, not only is winglike flap (W) together with for-wing release member (12) folded onto the side of liquid-permeable front face sheet (3) but also individual packaging member (16) is bonded with for-main-body release member (11) and/or the for-wing release member (12). Accordingly, there is no overlapping of winglike flap (W,W) on the side of liquid-permeable front face sheet (3), and distal end portions of the for-wing release member (12) are superimposed one upon the other. At the superimposing area (S), the portions of the for-wing release member (12) are detachably bonded together by means of wing temporary fixing pressure sensitive adhesive layer (14).

Description

Specification

Absorbent articles

Technical field

TECHNICAL FIELD [0001] The present invention relates to an absorbent article provided with a wing-shaped flap that is used so as to be wound around a crotch portion of an underwear when being fixed to the underwear.

Background art

Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, a cage sheet, and an incontinence pad, for example, as shown in FIGS. 10 and 11, a polyethylene sheet or a polyethylene laminated nonwoven fabric, etc. It is known that an absorbent body 52 made of cotton-like pulp or the like is interposed between a liquid-impervious back sheet 50 made of a material and a liquid-permeable surface sheet 51 made of a nonwoven fabric or a porous plastic sheet. ing.

[0003] For this type of absorbent article N, for example, one or a plurality of adhesive layers 53, 53 are formed on the non-skin contact surface side (outer surface) in order to prevent misalignment in the mounted state, In addition, wing-shaped flaps W, W that extend outward are integrally formed on both sides in the longitudinal direction of the napkin body, and the surface of the wing-shaped flaps W, W on the liquid-impermeable back sheet 50 side ( There are some which are provided with adhesive layers 54, 54 on the outer surface.

[0004] When the absorbent article N is fixed to the undergarment 30, as shown in Fig. 12, the absorbent article N is locally applied and the wing-shaped flaps W, W protruding laterally are put on the undergarment. Take out the two wing-shaped flaps W and W at the folding lines RL and RL, and attach them to the outer surface of the crotch of the underwear 30 while winding the crotch part of the underwear.

[0005] On the other hand, when the absorbent article N is individually packaged, the wing-shaped flaps W, W are folded on the non-use surface side (rear surface side) (hereinafter sometimes referred to as back folding for convenience). ) In the first embodiment (see, for example, Patent Document 1), as shown in FIG. 13, the wing-shaped flaps W, W are folded to the use surface side (hereinafter, abdomen for convenience). A second mode of covering each adhesive layer 54, 54 and enclosing it in an individual bag in a state of being connected by a release paper 56 between the adhesive layers 54, 54 (for example, , See Patent Document 2). [0006] However, in the case of the individual packaging form according to the first aspect, when the individual packaging bag is opened, the release paper is peeled off, and the absorbent article N is attached to the underwear, the wing-shaped flaps W, W are backed. Since the side folds are attached, the wing-shaped flaps W and W must be spread by hand, and in some cases, the adhesive layer 54 of the wing-shaped flaps W and W adheres to the main body backsheet 50. Therefore, when this was peeled off, the base material of the main body backsheet 50 could be stretched or torn, making the napkin unusable.

[0007] In the case of the individually packaged form according to the second aspect, the wing-shaped flaps W, W have creases on the use surface side, so that the adhesive is formed on the wing-shaped flaps W. The layer 54 does not adhere to the adhesive layer 53 formed on the back surface of the main body. However, the release paper 56 straddled between the wing-shaped flaps W and W must be peeled off by hand and discarded, and the one-step opening method (the release paper can be removed automatically between each opening hand). The method to make it possible is not realized. In addition, the wing-shaped flaps W and W do not automatically open even if the release paper 56 is peeled off. The wing-shaped flaps W and W remain folded by the folding folds. It took a lot of time to wear.

Therefore, in the following Patent Document 3, the present applicant covers the anti-displacement adhesive layers 61 and 61 formed on the wing-shaped flaps W and W as shown in FIG. 14 in the individually packaged product state. A wing release material 62 is provided, and the wing-shaped flaps W and W are folded together with the wing release material 62 on the liquid-permeable surface sheet 63 side, and the wing release material 62 is formed of the wing-shaped flaps W and W. It extends beyond the fold line position to the surface on the liquid-impervious back sheet 64 side, and the wing release material 62 is directly on the liquid-impervious back sheet 64 side with the individual packaging or on the main body. It is fixed through a release material for the main body that covers the anti-displacement adhesive layer, and when the wing-shaped flaps W, W are folded together with the release material 62 for wings on the liquid-permeable surface sheet 63 side! /, The wing-shaped Have overlapping-up W, the distal ends of the W, the wing-like flaps W, W together proposed the napkin 60 that is temporarily fixed by the adhesive layer in this overlapping portion.

Patent Document 1: JP-A-9 94267

Patent Document 2: Utility Model Registration No. 2567607 Patent Document 3: Japanese Patent Application Laid-Open No. 2004-113590

Disclosure of the invention

Problems to be solved by the invention

[0009] According to the napkin according to Patent Document 3, the wing-shaped flap does not adhere to the adhesive layer formed on the back surface of the main body at the time of opening, the one-step opening method can be realized, and the packaging material can be used. It is possible to reduce the labor of wearing by automatically unfolding the wing-shaped flap when peeling. In addition, by temporarily securing the wing-shaped flaps together, the wing-shaped flaps can be stably folded in the manufacturing process, eliminating the flapping of the wing-shaped flaps during line transport, and ensuring stable operation. It becomes possible to become.

[0010] However, since the wing-shaped flaps W, W are temporarily fixed directly by the adhesive layer, the adhesive layer remains on the surface of the wing-shaped flap on the surface sheet side, and the shorts There was a problem that the pressure-sensitive adhesive layer was exposed on the outer surface side of the wing-shaped flap in the mounted state.

[0011] Further, when the individual packaging material is peeled from the napkin together with the release material upon opening, the wing-shaped flap is folded to the liquid-permeable surface sheet side, so that a large resistance is generated at the stage of deploying the wing release material. There was a risk of the wing release material tearing

Yes

[0012] Therefore, a first problem of the present invention is to provide a wing-shaped flap, and in an absorbent article in which the wing-shaped flap is folded in the individual packaging state, the wing-shaped flap is folded to the surface sheet side and temporarily fixed. Therefore, the adhesive layer is not provided on the surface of the wing-shaped flap on the surface sheet side.

[0013] The second problem is that when the individual packaging material is peeled from the napkin together with the release material upon opening, the release material for wings is smoothly unfolded together with the wing-shaped flap without resistance, and the release material can be easily removed from the absorbent article. It is to make it peelable.

Means for solving the problem

[0014] In order to solve the first problem, as the present invention according to claim 1, the present invention according to claim 1 is provided on both sides of the main body portion in which an absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet. , Wearing V, to the absorbent article formed with a wing-shaped flap that is fixed so that the crotch part of the underwear is sometimes caught

A main body slip-preventing adhesive layer is formed on the liquid-impervious back sheet side surface of the main body portion, and a wing slip-preventing adhesive layer is formed on the liquid-impervious back sheet side surface of the wing-shaped flap. ,

In the individually packaged product state, the main body anti-slip adhesive layer is covered with the main body release material, and the anti-slip adhesive layer formed on the wing-shaped flap crosses in the width direction. Covered with a wing release material with a length extending outward from the ends of both wing-shaped flaps,

The wing-shaped flap is folded together with the wing release material on the liquid-permeable surface sheet side, and the individual packaging material is fixed to the main body release material and / or the wing release material,

On the liquid-permeable surface sheet side, the wing-shaped flaps do not overlap each other, the wing release materials overlap each other, and the wing release materials are separated from each other by the wing temporary fixing adhesive layer at the overlapping portion. An absorbent article is provided that is capable of being joined.

[0015] In the present invention according to claim 1, when the wing-shaped flap is folded and temporarily fixed, the wing release material is set to have a length extending outward from both ends of the wing-shaped flaps. The tip portions of the wing release materials overlap with each other in a folded state, and the wing release materials are joined to each other by the wing temporary fixing pressure-sensitive adhesive layer at the overlapping portion. Therefore, since the wing temporary fixing adhesive layer is not formed on the wing-shaped flap, the adhesive layer is not exposed on the outer surface side of the wing-shaped flap when attached to the shorts.

[0016] In the present absorbent article, when the individual packaging material is peeled off, the wing-shaped flap is pulled toward the back sheet side by the wing release material, and the wing-shaped flap folded in the stomach is automatically deployed. Become. In addition, since the wing-shaped flap is unfolded after the wing-shaped flap is unfolded, it is possible to prevent the wing-shaped flap from adhering to the anti-slipping adhesive layer formed on the back surface of the main body. Also, if the individual packaging material is peeled off, Since the release material for the main body is peeled off together with the release material or the release material for wings, a complete one-step opening method can be realized.

[0017] In order to solve the second problem, as the present invention according to Claim 2, from the front side of the absorbent article, a front fixed end portion between the individual packaging material and the main body release material, the wing release The absorbent article according to claim 1, wherein the absorbent article is located in the order of a front shape line of a material, a front base of the wing-shaped flap, and a front end portion of the wing temporary fixing adhesive layer.

[0018] In order to solve the second problem, as the present invention according to claim 3, the front shape line of the wing release material is at least 5 mm or more in front of the front end of the wing temporary fixing adhesive layer. An absorbent article according to any one of claims 1 and 2 is provided.

[0019] The inventions according to claims 2 and 3 include a front fixed end portion between the individual packaging material and the main body release material, a front shape line of the wing release material, a front root of the wing-shaped flap, a front This stipulates the relative positional relationship of the front edge of the Wing Temporary Adhesive Layer, which allows the wings to be peeled smoothly and smoothly without resistance when the individual materials are peeled from the napkin together with the release material. The material can be deployed with wing-shaped flaps to make the release material easily peelable from the absorbent article.

[0020] The present invention according to claim 4, wherein the liquid-impervious back sheet and / or the wing release material is subjected to an opacity treatment or printing. A sex article is provided.

[0021] According to the invention of claim 4, the concealment when the used absorbent article is wrapped and discarded can be improved.

[0022] The present invention according to claim 5, wherein the wing-shaped flap is folded to the liquid-permeable surface sheet side together with the side outer peripheral flap with the position near the outer side of the absorber side edge as a fold line. The absorbent article according to any one of 4 to 4 is provided.

[0023] In the present invention according to claim 6, in an area including a base position of the wing-shaped flap.

The embossing force is applied. The reinforcing sheet is interposed between the sheets.

The absorbent article as described in any one of -4 is provided.

[0024] According to the inventions of claims 5 and 6, the base portion of the wing-shaped flap when opened It becomes possible to develop without having to rely on.

The invention's effect

[0025] As described above in detail, according to the present invention, in an absorbent article that includes a wing-shaped flap, and the wing-shaped flap is folded in the individual packaging state, the wing-shaped flap is folded to the surface sheet side and temporarily fixed. In doing so, since the adhesive layer is not provided on the surface of the wing-shaped flap on the surface sheet side, the adhesive layer is not exposed on the outer surface side of the wing-shaped flap when attached to the shorts.

[0026] Further, when the individual packaging material is peeled from the napkin together with the release material upon opening, the release material for wings is smoothly unfolded together with the wing-shaped flap without resistance, and the release material is easily peeled from the absorbent material. It becomes possible.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially broken development view of a sanitary napkin 1 according to the present invention, FIG. 2 is a rear view thereof, and is a view taken along line III-III in FIG.

[0028] The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet or the like, a liquid-permeable top sheet 3 that allows menstrual blood or a stool to permeate quickly, and both the sheets 2 , 3 comprising an absorbent body 4 made of cotton-like pulp or synthetic pulp, crepe paper 5 surrounding the absorbent body 4 in order to maintain the shape and diffusibility of the absorbent body 4, and both sides of the surface It is composed of side nonwoven fabrics 6 and 6 formed along the longitudinal direction of each part. In the periphery of the absorbent body 4, at the upper and lower edge portions, the outer edge portions of the liquid-impervious back sheet 2 and the liquid-permeable surface sheet 3 are bonded by an adhesive such as hot melt or an adhesive means such as heat seal. The liquid-impervious back sheet 2 and the side nonwoven fabric 6 which are bonded and extend laterally from the absorbent body 4 at both side edges thereof are bonded by an adhesive such as hot melt or an adhesive means such as heat seal. It is joined. In this specification, the flap portions at both side edges are referred to as “side outer peripheral flaps F”.

S

[0029] Hereinafter, the structure of the sanitary napkin 1 will be further described in detail.

The liquid-impermeable back sheet 2 is a force that uses a sheet material having at least a water-blocking property such as an olefin-based resin sheet such as polyethylene or polypropylene. Laminated non-woven fabric with non-woven fabric laminated on a non-woven fabric sheet, etc., and further non-woven fabric sheet with a waterproof film interposed to ensure practically liquid impermeability (in this case, the waterproof film and non-woven fabric are impermeable to liquid It is possible to use S. In recent years, from the viewpoint of preventing stuffiness, those having moisture permeability tend to be used. This water-blocking / moisture-permeable sheet material is a microporous sheet obtained by melt-kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. It is.

[0030] Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon cubra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Of these processing methods, the spunlace method is superior in terms of flexibility and drapeability, and the thermal bond method is superior in terms of being bulky and soft. On the other hand, on the upper surface of the liquid-permeable surface sheet 3, side embosses 7 and 7 are formed along the longitudinal direction on both sides across the site for blood discharge, and arcuate embosses 8 and 8 are respectively formed on the front and rear portions. 8 is formed.

[0031] The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is composed of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber, for example, as a granular powder. Examples of the pulp include cellulose fibers such as chemical pulp and dissolving pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. It is preferably used in terms of function and price. When the crepe paper 5 surrounding the absorber 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorber 4 as a result. The above-mentioned crepe paper 5 which is excellent in properties makes it possible to quickly diffuse body fluids and to prevent the return of menstrual blood.

[0032] On the other hand, the surface of the sanitary napkin 1 is located along the longitudinal direction on both sides. The side nonwoven fabrics 6 and 6 are provided over almost the entire length of the napkin 1, and a part of the side nonwoven fabrics 6 and 6 extend to the side and the liquid-impermeable back surface that also extends to the side. Wing-shaped flaps W and W are formed by a part of the sheet 2.

[0033] As the side nonwoven fabric 6, a water-repellent treated nonwoven fabric or a hydrophilic treated nonwoven fabric can be used from the viewpoint of important functions. For example, if importance is placed on functions such as preventing permeation of menstrual blood or vaginal discharge, or enhancing the feel of the skin, a silicone-based, araffin-based, alkyl chloride water-repellent, etc. is coated. It is desirable to use a water-repellent nonwoven fabric. If importance is attached to the absorption of menstrual blood etc. in the wing-shaped flaps W, W, a method of polymerizing a compound having a hydrophilic group, for example, an oxidation product of polyethylene glycol, in the process of producing a synthetic fiber. Or by treating the surface with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to make the synthetic fiber swell or porous, and apply capillary action to make it hydrophilic. It is desirable to use a hydrophilic treated non-woven fabric that imparts properties!

[0034] As shown in FIG. 2, an underwear is placed on the non-skin contact surface of the main body portion in which the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2. A plurality of strips of adhesive body layers 9, 9, ... in the illustrated example are formed according to an appropriate coating pattern for fixing to the body, and these body stopper adhesive layers 9, 9, · · Is covered with release material 11 for the main body. The wing-shaped flaps W and W have a liquid-impervious back sheet 2 side surface on which a wing-slipping adhesive layer 10, 10 is formed, and these wing-slipping adhesive layers 10, 10 force S The wing release material 12 is covered with a single wing release material 12 having a length that crosses in the width direction and extends outward from the tips of both wing-shaped flaps W. Further, as shown in the illustrated example, the main body release material 11 and the wing release material 12 are described later so that they cannot be peeled off by a hot melt adhesive or the like in the region surrounded by the chain lines 13, 13. It is firmly fixed to the loading sheet 16 and integrated.

[0035] As the pressure-sensitive adhesive that forms the anti-slipping pressure-sensitive adhesive layers 9 and 10, for example, a styrenic polymer, a tackifier, or a plasticizer mainly used is preferably used. Examples of the styrene polymer include styrene ethylene-butylene styrene block copolymer, styrene-butylene styrene block copolymer, styrene isobutylene. Forces including styrene copolymers, etc. Only one of these may be used, or two or more polymer blends may be used. Of these, styrene, ethylene-butylene, and styrene block copolymers are preferred because of their good thermal stability. In addition, as the tackifier and the plasticizer, those that are solid at room temperature can be preferably used. Examples of the tackifier include C5 petroleum resin, C9 petroleum resin, dicyclopentagen petroleum oil resin, Examples include rosin petroleum resins, polyterpene resins, and terpene phenol resins. Examples of the plasticizer include monomer plasticizers such as trifresil phosphate, dibutyl phthalate, and diactyl phthalate, as well as bull polymers and polyesters. Polymer plasticizers.

[0036] As the release materials 11 and 12, for the contact surfaces with respect to the anti-displacement adhesive layers 9 and 10, for example, a release treatment such as a silicone resin, a fluorine resin, or a tetrafluoroethylene resin is used. The power to apply the liquid, paper or plastic sheet that has been spray-coated and mold-released can be used. In this case, at least the wing release material 12 is made of a plastic sheet rich in flexibility so that the wing flaps W and W can be smoothly unfolded when opened from the individual packaging state and the individual packaging material is peeled off. It is good. It is also possible to use a sheet material obtained by subjecting a nonwoven fabric to a release treatment. When the non-woven fabric is used as the film, it can be embossed to give a firmness. Furthermore, a sheet material having elasticity can be used. In particular, when a stretchable sheet material is used for the wing release material 12, the wing-shaped flaps W and W are easily developed by the elastic expansion and contraction force generated by the peeling.

[0037] In order to individually package the sanitary napkin 1 described above, as shown in Fig. 4, one wing-shaped flap W is placed on the side of the folding line RL set near the outer side of the absorber 4 side edge. Folded to the liquid-permeable surface sheet 3 side together with the wing release material 12 including the outer peripheral flap F

S

After that, the other wing-shaped flap W is a fold line RL set near the outer side of the absorber 4 side edge, and the permeable surface sheet together with the wing release material 12 including the side outer peripheral flap F.

S

Fold it to side 3.

[0038] In this case, simply folding the wing-shaped flaps W, W to the liquid-permeable surface sheet 3 side does not stabilize the shape, and the wing-shaped flaps W, W are lifted or fluttered. May occur and cause positional misalignment during line conveyance. Therefore, in order to stabilize the operation, the wing-shaped flap W is kept folded together with the wing release material 12 on the liquid-permeable surface sheet 3 side. Specifically, the ends of the wing release material 12 folded to the liquid-permeable surface sheet 3 side overlap each other, and the wing release materials 12 overlap the wing temporary fixing adhesive layer 14 at the overlapping portion. Therefore, temporary fixing is performed by adhering in a peelable manner. The tips of the wing-shaped flaps W, W are not overlapped. The overlap margin S of the wing release material 12 has a force S of 5 mm or more, preferably 7 mm or more, more preferably 10 mm or more of the protruding length L of the wing-shaped flap W in order to further stabilize the operation.

[0039] As the wing temporary fixing pressure-sensitive adhesive layer 14, in addition to the pressure-sensitive adhesive used in the anti-displacement pressure-sensitive adhesive layers 9 and 10, a hot melt adhesive can be suitably used. As this hot-melt adhesive, for example, a hot-melt adhesive containing 12-hydroxystearic acid and polybutene disclosed in JP-A-2005-290193 is particularly suitable. The hot melt adhesive is preferably an intermittent coating such as a dot shape or a spiral shape.

[0040] In the napkin 1, when the individual sheet 16, which will be described later, is peeled from the napkin 1 together with the release materials 11 and 12 before opening, the wing release material 12 is smoothly and smoothly removed from the napkin 1 with the wing flaps W, W In order to allow the release materials 11 and 12 to be easily peeled from the napkin 1, the release sheet 11 and the main body peel from the front side of the napkin 1, that is, from the release side of the individual sheet 16. The front fixed end A with the material 11, the front shape line B of the wing release material 12, the front base position C of the wing-shaped flap W, and the front end position D of the wing temporary fixing adhesive layer 14 in this order. To be located. In this case, the front shape line B of the wing release material 12 may be separated from the front end D of the wing temporary fixing pressure-sensitive adhesive layer 14 by at least 5 mm (symbol KL) in FIG. desirable. The base position C of the wing-shaped flap W is determined based on the folding line R when the shorts are attached.

[0041] It is desirable that the liquid-impermeable back sheet 2 and / or the wing release material 12 be subjected to an opacity treatment or printing. As the opacity treatment, plastic In addition, pigments and fillers such as calcium carbonate, titanium oxide, white carbon, clay, talc, and barium sulfate can be internally added to form a film. Printing may be simply by coloring, or may be decorated with a pattern. By performing the opacifying treatment or printing, the concealment property such as menstrual blood is enhanced when the used napkin 1 is wrapped and discarded.

[0042] If the wing-shaped flaps W, W are folded together with the wing release material 12 on the surface side, the sanitary napkin 1 is individually mounted with the individual sheet 16.

[0043] As shown in Fig. 6, the individual packaging method is such that the width dimension is narrower than the deployment width of the napkin 1 (distance between the tips of the wing-shaped flap IW), and the wing-shaped flaps W and W are folded. The individual sheet 16 having a predetermined length that is wider than that of the individual sheet 16 is arranged on the individual sheet 16 so that at least one short side 16b of the individual sheet 16 is positioned outside one of the front and rear ends of the napkin 1. The napkin 1 is arranged, and the individual packaging sheet 16 and the main body release material 11 and / or the wing release material 12 are firmly fixed to each other in a region 13, 13, ... by a hot melt adhesive or the like. .

[0044] After that, if the napkin rear end side is folded at the fold line (1) position, the napkin front end side is folded at the fold line (2) position, and as shown in FIG. The 16 open side edge portions 16a are sealed by an appropriate sealing means alone or in combination, such as emboss pressure bonding, heat fusion, and adhesive. Further, the front-rear direction edge 16 b of the individual sheet 16 is preferably sealed with a tab tape 17 after being joined with an adhesive.

[0045] In the case of a force-absorbing individual absorbent article, as shown in FIG. 8, when the napkin 1 is taken out of the individual packaging bag and the individual packaging sheet 16 is peeled off, the wing-shaped flaps W and W are winged. The wing-shaped flaps W and W that are pulled and folded on the back sheet side by the release material 12 are automatically deployed. At this time, from the front side of the napkin 1, that is, from the release side of the individual sheet 16, the front fixed end A of the individual sheet 16 and the main body release material 11, the front shape line of the wing release material 12 B, the front base position C of the wing-shaped flap W, the front end position D of the wing temporary fixing adhesive layer 14 are positioned in this order, and the front shape line B of the wing release material 12 is the wing If the main body release material 11 is peeled off from the front side of the napkin 1 by separating it from the front side edge D of the temporary adhesive layer 14 by at least 5mm (sign KL dimension), the wing-shaped flap W part so Since the folds of the wing-shaped flap w are gradually released from the front side of the napkin 1, the wing-shaped flap W starts to be deployed, so the resistance acting on the wing release material 12 is reduced and smooth deployment is achieved. Is possible. Furthermore, when the wing release material 12 is peeled off from the wing slip-off adhesive 10, the wing-shaped flap W is in a state of gradually unfolding, so that it can be easily turned up from the wing slip-off adhesive 10. Remove with force S.

[0046] Since the wing-shaped flaps W, W have some creases on the use surface side after the wing-shaped flaps W, W are unfolded, the wing-shaped flaps W, W It will not be bonded to the anti-displacement adhesive layer 9, 9. When the individual sheet 16 is peeled off, the release material 11 for the main body is peeled off together with the release material 12 for the wing, so that a complete one-step opening method can be realized.

By the way, the present invention can be variously modified in addition to the above-described embodiments. The following are listed in order:

[0048] (1) In the above embodiment, when the wing-shaped flaps W, W are folded to the top sheet 3 side, the wing-shaped flaps W are folded together with the outer peripheral flap F. However, as shown in FIG. Hula

S

Only the W and W portions may be folded to the top sheet 3 side. When folding the wing-shaped flaps W and W to the top sheet 3 side, including the side outer peripheral flap F

S

The base of the wing-shaped flap can be unfolded at the time of opening, but as shown in Fig. 9, when only the wing-shaped flaps W and W are folded to the top sheet 3 side, the wing-shaped at the time of opening Since the base part of the flap may be relied upon or wrinkles may occur, the area 18 including the base position of the wing-shaped flap W is embossed, the liquid-impermeable back sheet 2 and the side nonwoven fabric 6 A reinforcing sheet such as paper may be interposed between the sheets to add stiffness.

[0049] (2) In the above example, the wing-shaped flaps W and W are folded to the liquid-permeable surface sheet 3 side together with the side outer peripheral flap F, with the position near the outer side of the side edge of the absorber 4 as a fold line. But,

S

Side edge of outer peripheral flap F and absorber 4 with inner line of absorber side edge as broken line

S

It may be folded to the liquid-permeable surface sheet 3 side with the minute. In this case, further downsizing can be achieved. [0050] (3) In the above example, the force described in detail by taking the sanitary napkin 1 with the wing-shaped flap WW as an example. In the napkin, the present invention can be similarly applied to the hip-hold wing-shaped flap.

[0051] (4) In the above example, even if the side nonwoven fabric 6 and the liquid-impermeable back sheet 2 are used to form the wing-shaped flap WW, the force S can be formed, and the side nonwoven fabric 6 alone can form the wing-shaped flap W. Yo V, and liquid-impervious back sheet 2 Wing flap W can be formed by itself!

Brief Description of Drawings

FIG. 1 is a partially broken development view of a sanitary napkin 1 according to the present invention.

FIG. ² is a rear view thereof.

FIG. 3 is a view taken along line III-III in FIG.

FIG. 4 is a plan view showing how to fold a wing-shaped flap.

FIG. 5 is a cross-sectional view thereof (a view taken along line V—V in FIG. 4).

FIG. 6 is a perspective view showing an individual packaging procedure.

FIG. 7 is a perspective view showing an individual packaging state.

FIG. 8 is a perspective view showing an opening procedure.

FIG. 9 is a plan view of a napkin showing another example of how the wing-shaped flap W is folded.

FIG. 10 is a development view of a conventional sanitary napkin N.

FIG. 11 is a cross-sectional view thereof.

FIG. 12 is a diagram showing the mounting state.

FIG. 13 is a plan view showing a folding procedure (part 1) of a conventional wing-shaped flap W W

FIG. 14 is a plan view showing a folding procedure (part 2) of a conventional wing-shaped flap W W

[0053] 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber

5 ··· Crepe paper, 6 ··· Side nonwoven fabric, ·································································································· Release material, 14 ... Wing temporary fixing Adhesive layer, 16 ··· Individual sheet, 17 ··· Tape tape, ······················ Wing-like flap W area including the base of the W, W… Wing-like flap, F… Side outer peripheral flap

Claims

The scope of the claims

[1] A wing shape that is fixed so that the crotch part of the underwear is wrapped around each side of the main body part where the absorbent body is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet. To the absorbent article formed with a flap,

On the liquid-permeable surface sheet side, the wing-shaped flaps do not overlap each other, the wing release materials overlap each other, and the wing release materials are separated from each other by the wing temporary fixing adhesive layer at the overlapping portion. Absorbent article characterized in that it can be joined.

[2] From the front side of the absorbent article, the front fixed end portion between the individual packaging material and the main body release material, the front shape line of the wing release material, the front root of the wing-shaped flap, the wing temporary fixing The absorbent article according to claim 1, wherein the absorbent article is positioned in the order of the front end portion of the pressure-sensitive adhesive layer.

[3] The absorbent article according to any one of claims 1 and 2, wherein the front shape line of the wing release material is spaced at least 5 mm forward from the front end of the wing temporary fixing pressure-sensitive adhesive layer.

[4] The absorbent article according to any one of claims 1 to 3, wherein the liquid-impervious back sheet and / or the wing release material is subjected to an opacity treatment or printing.

[5] The wing-shaped flap has a lateral outer periphery with a position near the outer side of the absorber side edge as a broken line. The absorbent article according to any one of claims 1 to 4, wherein the absorbent article is folded on the liquid-permeable surface sheet side together with the flap.

The absorbent material P o according to any one of claims 1 to 4, wherein a region including the base position of the wing-shaped flap is embossed! /, A force, and a reinforcing sheet is interposed between the sheets.