JP5503225B2 - Individual absorbent articles - Google Patents

Description

  The present invention relates to an individual absorbent article having a wing-shaped flap that is used so as to be wound around a crotch portion of an undergarment when being fixed to the undergarment.

  Conventionally, as absorbent articles such as sanitary napkins, panty liners, cage sheets, incontinence pads, etc., it consists of a liquid-impermeable back sheet made of polyethylene sheet or polyethylene laminated nonwoven fabric, and a nonwoven fabric or porous plastic sheet. There is known one in which an absorbent body made of cotton-like pulp or the like is interposed between the liquid-permeable surface sheet.

  As an absorbent article of this type, for example, one or a plurality of adhesive layers are formed on the non-skin contact surface side (outer surface) in order to prevent misalignment in the mounted state, and both sides in the longitudinal direction of the napkin body A wing-shaped flap extending outward is integrally formed on the part, and an adhesive layer is provided on the surface (outer surface) of the wing-shaped flap on the liquid-impervious back sheet side.

  When fixing the absorbent article to the underwear, place the absorbent article locally, take out the wing-shaped flaps protruding sideways from the underwear, fold back both wing-shaped flaps, and wrap the crotch part of the underwear Adhere to the outer surface of the crotch of the underwear.

  In order to achieve one-step opening and improve the opening property when individually packaging the absorbent article, the applicant of the present invention in Patent Document 1 below, as shown in FIG. A main body anti-slip adhesive layer is formed on the surface of the liquid-permeable back sheet side, and wing anti-slip adhesive layers 51 and 51 are formed on the surface of the wing-shaped flaps W and W on the liquid-impermeable back sheet side. 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 layers 51 and 51 formed on the wing-shaped flaps W and W cross in the width direction. Covered by the wing release material 52, the wing-shaped flaps W, W are folded together with the wing release material on the liquid-permeable surface sheet side, and the individual packaging material is the main body release material. It is fixed to either or both of the wing release materials, and the wing-shaped flaps W, W are overlapped on the liquid-permeable surface sheet side, and the wing-shaped flaps W, W are overlapped with each other at the overlapping portion. Temporarily fixed wings that are detachably bonded by the temporary wing adhesive layer 53 (or indirectly through the wing release material 52) and that join the wing-shaped flaps W, W together. The absorbent article 50 in which the adhesive strength of the pressure-sensitive adhesive layer 53 is set lower than the adhesive strength between the wings-stopping pressure-sensitive adhesive layers 51 and 51 and the wing release material 52 has been proposed.

JP 2008-136666 A

  However, even in the case of the absorbent article according to Patent Document 1 described above, for example, when the outer surface of the wing-shaped flap is made of a highly adhesive material such as a plastic film, the adhesive strength between the wing-shaped flaps W and W is too high. As a result, the openability may deteriorate, and the plastic outer sheet of the wing-shaped flap may be torn at the time of opening. On the other hand, if the adhesive force is reduced too much, bonding is released during operation, and product defects such as turning over of the wing-shaped flap often occur.

  Therefore, the main problem of the present invention is to provide a wing-shaped flap with a wing-shaped flap, and in the individually-packed absorbent article in which the wing-shaped flap is folded in the individual packaging state. It is intended to prevent tearing of the outer sheet and to prevent the wing-shaped flap from being easily released during operation.

In order to solve the above-mentioned problem, as the present invention according to claim 1, underwear is attached to each side of the main body portion where the absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet. In the absorbent article formed with a wing-shaped flap that is fixed so as to involve the crotch part,
A main body anti-slip adhesive layer is formed on the liquid-impervious back sheet side surface of the main body part, and a wing anti-slip 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 a main body release material, and the anti-slip adhesive layer formed on the wing-shaped flap is covered with a wing release material that crosses the width direction,
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 either or both of the main body release material and the wing release material,
At the liquid-permeable surface sheet side, the leading ends of the wing-shaped flaps are overlapped, and the wing-shaped flaps are separated at the overlapping portions by a linear wing temporary fixing adhesive layer formed along the longitudinal direction of the absorbent article. In addition to the wing temporary fixing adhesive layer, the wings are directly joined at at least one of the front and rear end portions, and the other portions sandwich the wing release material. In addition, the adhesive strength obtained by indirectly joining the wings is set to be larger than the adhesive strength indirectly joined via the wing release material. The individual absorbent article characterized by this is provided.

  In the present invention according to claim 1, when the individual packaging material is peeled off, the wing-shaped flap is pulled to the back sheet side by the wing release material so that the folded wing-shaped flap is automatically deployed. Become. At this time, the bonding by the wing temporary fixing adhesive layer is performed by directly connecting the wings at at least one of the front and rear end portions, and the other portions are indirectly interposed through the wing release material. It is joined to. Therefore, the plastic outer surface sheet of the wing-shaped flap is not torn at the time of opening because the wing-shaped flap is indirectly bonded through the wing release material in most areas. In addition, since the wings are directly joined at at least one of the front and rear end portions, it is possible to prevent the wing-shaped flaps from being turned up during operation. In this case, it is desirable that the one side end portion is on the downstream side in the line flow direction.

Regarding the bonding strength between the wing-shaped flaps, the bonding strength at which the wings are directly bonded to each other is set larger than the bonding strength at which the wing-like release material is bonded indirectly through the wing release material. By relatively increasing the adhesive strength obtained by directly joining the wings, turning-up of the wing-shaped flaps during operation can be reliably prevented.

  After the wing-shaped flap is unfolded, a certain amount of creases are attached to the use surface side, so that it is possible to prevent the wing-shaped flap from adhering to the anti-slip adhesive layer formed on the back surface of the main body. Further, when the individual packaging material is peeled off, the peeling material for the wing or the peeling material for the main body is peeled together with the peeling material for wing, so that a complete one-step opening method can be realized.

  According to a second aspect of the present invention, there is provided the individual absorbent article according to the first aspect, wherein an outer surface of the wing-shaped flap is a plastic film.

  In the second aspect of the present invention, the present invention is applied to an absorbent article in which the outer surface of the wing-shaped flap is a plastic film. When the outer surface of the wing-shaped flap is a plastic film, the bonding strength between the wing-shaped flaps tends to be high, and problems associated therewith occur. Therefore, the present invention is preferably applied to prevent this. .

  As a third aspect of the present invention, the wing-like release material is bonded to the outer surface of the wing-like flap so that the wing-like flaps are indirectly joined to each other via the wing-like release material. An individually absorbent article according to any one of claims 1 and 2 is provided.

  In the invention of claim 3, when the wing-shaped flaps are joined to each other, if the wing release material is turned up, it may not be indirectly joined via the wing release material. If the wing release material is bonded to the outer surface of the wing-shaped flap in advance so that the wing release material can be peeled off, the wing release material is prevented from being turned over, so the wings are indirectly sandwiched between the wing release materials. Can be joined.

In the present invention according to claim 4, the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer joining the wing-shaped flaps is set lower than the adhesive strength between the wings-stopping pressure-sensitive adhesive layer and the wing release material. The individual absorbent article according to any one of claims 1 to 3 is provided.

In the invention according to the fourth aspect, the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer joining the wing-shaped flaps to each other is lower than the adhesive strength between the wings-stopping adhesive layer and the wing release material. By being set, temporary fixing between the wing-shaped flaps can be easily released, and the wing release material can be smoothly developed without resistance.

As the invention according to claim 5, wherein the wing release material release treatment on the bonding surface side is given for stopping the disagreement adhesive, either opposite side of claim bonding strength reduction treatment is applied to the surface 1-4 An individually absorbent article according to the above is provided.

In the invention according to the fifth aspect, the bonding strength reduction treatment is applied to the opposite surface of the release material for wing, so that the adhesive strength is prevented from becoming too strong and the unsealing property is improved.

  As described above in detail, according to the present invention, in the individual absorbent article having a wing-shaped flap and the wing-shaped flap folded in the individual packaging state, the bonding strength between the wing-shaped flaps is made appropriate, and the wing It becomes possible to prevent tearing of the outer sheet of the flap. Furthermore, it is possible to prevent the joining of the wing-shaped flaps from being easily released during operation.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. FIG. It is the III-III arrow directional view of FIG. It is a top view which shows the folding procedure of a wing-shaped flap. It is the cross-sectional view (VV arrow line view of FIG. 4). It is a perspective view which shows the individual packaging procedure. It is a perspective view which shows an individual packaging state. It is a perspective view which shows the opening procedure. It is a top view which shows the other example of the peeling material 12 for wings. It is a top view which shows the other example of the peeling material 12 for wings. It is an expanded view which shows the other folding point of the modification of the peeling material 12 for wings, and the wing-shaped flaps W and W. FIG. It is a top view which shows the folding procedure of the conventional wing-shaped flaps W and W. FIG.

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

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

The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, etc., a liquid-permeable front sheet 3 that allows permeation of menstrual blood, cages, etc. An absorbent body 4 made of cotton-like pulp or synthetic pulp intervening in the sheet, crepe paper 5 surrounding the absorbent body 4 for maintaining the shape and improving the diffusibility of the absorbent body 4, and longitudinally on both sides of the surface. It is comprised from the side nonwoven fabrics 6 and 6 formed along the direction. Around the absorber 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 joined by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, the liquid-impervious backsheet 2 and the side nonwoven fabric 6 that extend laterally from the absorbent body 4 at both side edges thereof are joined by an adhesive such as hot melt or an adhesive means such as heat seal. Has been. In the present specification, the flap portions at both side edges are referred to as “side outer peripheral flaps F _S ”.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. This water- and moisture-permeable sheet material is a microporous sheet obtained by forming a sheet by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. It is.

  Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a lace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent 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 on both sides of the blood drainage corresponding site, respectively along the substantially longitudinal direction, and arcuate embossing 8 and 8 is formed.

  The absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made 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 granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolved pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price. When the crepe paper 5 surrounding the absorbent body 4 is provided as in this example, the crepe paper 5 is interposed between the liquid-permeable surface sheet 3 and the absorbent body 4 as a result. The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like.

  On the other hand, side nonwoven fabrics 6 and 6 are provided on both sides of the sanitary napkin 1 along the longitudinal direction and almost the entire length of the napkin 1, respectively. Wing-like flaps W, W are formed by a part of the liquid-impervious back sheet 2 that extends sideways and also extends sideways.

  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 touch feeling, water repellent treatment coated with silicon, paraffin or alkylchromic chloride water repellent It is desirable to use a nonwoven fabric. Further, if importance is attached to the absorption of menstrual blood and the like 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, , By treating with a metal salt such as stannic chloride, partially dissolving the surface to make it porous, and depositing metal hydroxides to swell or make the synthetic fiber porous, applying capillary action to make it hydrophilic It is desirable to use a hydrophilic treated non-woven fabric provided with.

  As shown in FIG. 2, the non-skin contact surface of the main body part in which the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 is for fixing to the underwear. A plurality of main body misalignment-preventing adhesive layers 9, 9,... In the illustrated example are formed by an appropriate coating pattern, and the main body misalignment-preventing adhesive layers 9, 9,. Covered by. The wing-shaped flaps W, W are formed on the liquid-impervious back sheet 2 side with wings-stopping adhesive layers 10, 10, and the wings-stopping adhesive layers 10, 10 are wide. It is covered with one wing release material 12 that crosses in the direction. Further, as shown in the illustrated example, the main body release material 11 and the wing release material 12 are firmly fixed and integrated in a region surrounded by the chain line 13 so as not to be peeled off by a hot melt adhesive or the like. Both the main body release material 11 and the wing release material 12 are fixed to a packaging sheet 16 described later.

  As the pressure-sensitive adhesive that forms the anti-displacement pressure-sensitive adhesive layers 9 and 10, for example, a styrenic polymer, a tackifier, or a plasticizer whose main component is preferably used. Examples of the styrenic polymer include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene-styrene block copolymers, and styrene-isobutylene-styrene copolymers. It may be used or two or more polymer blends. Among these, a styrene-ethylene-butylene-styrene block copolymer is preferable in terms of good thermal stability. As the tackifier and plasticizer, those that are solid at room temperature can be preferably used. Examples of the tackifier include C5 petroleum resins, C9 petroleum resins, dicyclopentadiene petroleum resins, and rosin petroleum resins. In addition to monomer plasticizers such as triphenyl phosphate, dibutyl phthalate and dioctyl phthalate, polymer plasticizers such as vinyl polymers and polyesters can be used. Can be mentioned.

  As the release materials 11 and 12, for example, a release treatment liquid such as a silicone resin, a fluorine resin, or a tetrafluoroethylene resin is applied to the contact surfaces with respect to the slip prevention adhesive layers 9 and 10. Alternatively, 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 flexible plastic sheet so that the wing flaps W and W can be smoothly unfolded when the individual packaging material is peeled off from the individual packaging state. Is good. It should be noted that the film itself or the nonwoven fabric itself may be used as long as it does not cause a substantial decrease in the adhesive force without special release treatment.

In order to individually package the sanitary napkin 1 described above, as shown in FIG. 4, one wing-shaped flap W is a fold line RL set near the outer side of the side edge of the absorbent body 4 and side outer peripheral flaps. after folding together the wing release material 12 on the liquid-permeable surface sheet 3 side, including the F _S, the other wing-shaped flaps W to be set outside the vicinity of the absorbent body 4 side edges the folding lines RL, side so that folded liquid-permeable topsheet 3 side together with the wing release member 12 including the outer peripheral flap F _S.

  In this case, if the wing-shaped flaps W, W are simply folded to the liquid-permeable surface sheet 3 side, the shape is not stable, and the wing-shaped flaps W, W are lifted or fluttered. And may cause entanglement. Therefore, in order to stabilize the operation, the wing-shaped flap W is held in a state of being folded together with the wing release material 12 on the liquid-permeable surface sheet 3 side. Specifically, the wing-shaped flaps W and W folded on the liquid-permeable surface sheet 3 side are overlapped with each other, and the wing-shaped flaps W and W are overlapped with each other at the overlapping portion. A linear wing temporary fixing pressure-sensitive adhesive layer 14 formed along the longitudinal direction is detachably bonded.

  As shown in FIG. 4, the wing temporary fixing pressure-sensitive adhesive layer 14 has wings W and W directly joined to each other at least one of the front and rear end portions (A1 region), and other portions ( (A2 region) is indirectly joined via the wing release material 12 therebetween. In this case, the bonding strength between the wing-shaped flaps W and W is such that the bonding strength (per unit area) of the region A1 where the wings W and W are directly bonded is interposed between the wing release materials 12. It is preferable that the adhesive strength (per unit area) of the region A2 joined indirectly is set. As a result, turning of the wing-shaped flaps W, W during operation can be reliably prevented. The overlap margin S of the wing-shaped flaps W, W is desirably about 1/4 or more of the protruding length SK of the wing-shaped flap W in order to further stabilize the operation.

  Further, in order to ensure that the region A2 indirectly joined via the wing release material 12 is formed, the wing-shaped flaps W, W are connected to each other as shown in FIG. Is attached to the outer surface of the wing-shaped flap W so as to be peeled off by an adhesive 15 for preventing turning over at a portion where the wing release material 12 is indirectly bonded via the wing release material 12. desirable. If the wing release material 12 is adhered to the outer surface of the wing-shaped flap W in advance so as to be peelable, the wing release material 12 is prevented from being turned over, so that the wing release material 12 is interposed between them. It becomes possible to join indirectly.

  In the present napkin 1, the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer 14 that bonds the wing-shaped flaps W, W to each other is based on the adhesive strength between the wings-stopping adhesive layer 10 and the wing release material 12. Is set too low. Here, the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer 14 joining the wing-shaped flaps is 0.05 to 1.00 (N), preferably 0.05 to 0.60 (N). The adhesive strength between the anti-displacement adhesive layer 10 and the wing release material 12 is 0.15 to 1.50 (N), preferably 0.25 to 1.30 (N). The adhesive strength ratio calculated by the adhesive strength of the wings-stopping adhesive layer 10 and the wing release material 12 is 0.05 to 0.80, preferably 0.05 to 0.70. desirable. When the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer 14 is less than 0.05 (N), the wing-shaped flaps W and W cannot be sufficiently temporarily attached. If it exceeds 1.00 (N), the wing-shaped flaps W and W cannot be easily deployed when the release materials 11 and 12 are peeled off. If the adhesive strength between the wings-stopping pressure-sensitive adhesive layer 10 and the wing release material 12 is less than 0.15 (N), a shift may occur during mounting on shorts. Moreover, when it exceeds 1.50 (N), it becomes difficult to peel the release materials 11 and 12.

  The adhesive strength is a numerical value obtained by the following test method.

Both the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer 14 and the adhesive strength of the wings-stopping adhesive layer 10 and the wing release material 12 are measured with a Tensilon tensile tester.
(1) Test conditions Measurement speed: 300mm / min, distance between chucks: 25mm, chuck width: 40mm
(2) Adhesive strength test (peel strength test) of wing temporary fixing adhesive layer
A wing sample (40 mm long x 60 mm wide) is used in which the direction corresponding to the longitudinal direction of the napkin is taken in the vertical direction, the direction corresponding to the short direction is taken in the horizontal direction, and the wing temporary fixing point is in the center. The measurement is started by holding the wing tip and the other wing lateral end on the chuck, and the load peak when completely peeled off is measured.
(3) Adhesive strength between the wings-stopping adhesive layer and the wing release material (peel strength test)
A wing sample (40 mm long × 50 mm wide) containing a wing film and a wing adhesive is used, with the direction corresponding to the longitudinal direction of the napkin taken in the vertical direction and the direction corresponding to the short direction taken in the horizontal direction. Hold the end of the lateral wing film and the end of the lateral wing on the chuck, start the measurement, and measure the load peak when completely peeled off.

  On the other hand, it is desirable that the position of the front shape line A of the wing release material 12 be separated from the front base position of the wing-shaped flap W by at least 5 mm (symbol SL) to the front side. Note that the base position of the wing-shaped flap W is determined based on the turn-up line R when the shorts are mounted.

  On the other hand, the width dimension B of the main body release material 11 is at least 60% of the distance BK between the folding positions of the wing-shaped flaps W and W, and the longitudinal dimension L of the wing release material 12 is an absorbent article. It is desirable that the wing-shaped flaps W and W have a dimension not more than the distance LK between the tips in the developed state.

  Further, the release material 11 for the main body and the release material 12 for the wing are subjected to a release treatment with a silicon-based resin, a fluorine-based resin, a tetrafluoroethylene-based resin, or the like on the bonding surface with respect to the anti-displacement adhesives 9 and 10 It is desirable that the surface of the wing release material 12 opposite to the bonding surface side with respect to the anti-displacement adhesives 9 and 10 is subjected to a bonding strength reduction treatment. As the reduction treatment, for example, a film in which the peeling treatment has penetrated to the opposite surface is selectively used, or a silicon resin, a fluorine resin, or a tetrafluoroethylene resin is sufficiently diluted. A method such as coating on the surface can be employed.

  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 by the individual sheet 16.

  As shown in FIG. 6, the individual packaging method has a width that is narrower than the developed width of the napkin 1 (distance between the tips of the wing-shaped flaps W and W), and is smaller than the folded state of the wing-shaped flaps W and W. The individual sheet 16 having a predetermined length which is wide is used, and the napkin 1 is placed 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 end portions of the napkin 1. And the individual sheet 16 is firmly fixed to one or both of the main body release material 11 and the wing release material 12 by a hot melt adhesive or the like.

  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 side edge portion 16a thus sealed is sealed by an appropriate sealing means such as emboss pressure bonding, heat fusion, adhesive, or the like alone or in combination. Moreover, the front-rear direction edge 16b of the individual packaging sheet 16 is preferably sealed with a tab tape 17 after being joined with an adhesive.

  In the case of such an individual absorbent article, as shown in FIG. 8, when the napkin 1 is taken out from the individual bag and the individual sheet 16 is peeled off, the wing-shaped flaps W and W are separated from the back sheet by the wing release material 12. The wing-shaped flaps W, W that are pulled to the side and folded in the stomach are automatically deployed. At this time, the adhesive strength of the wing temporary fixing pressure-sensitive adhesive layer 14 that joins the wing-shaped flaps W, W to each other is based on the adhesive strength between the wings-stopping adhesive layers 10 and 10 and the wing release material 12. Further, the wing-shaped flaps W, W can be easily released from each other by being set low. Further, since the position of the front shape line A of the wing release material 12 is separated from the front base position of the wing flap W by at least 5 mm or more in front, the main body release material 11 is peeled from the front side of the napkin 1. In the wing-shaped flap W region, the folds of the wing-shaped flap W are gradually released from the front side of the napkin 1 and the wing-shaped flap W is deployed, so that the resistance force acting on the wing release material 12 Becomes smaller and smooth deployment becomes possible. Further, when the wing release material 12 is peeled from the wings-preventing pressure-sensitive adhesive 10, the wing-shaped flap W is gradually unfolded, so that it can be easily turned up from the wings-stopping adhesive 10. Can be peeled off.

  In addition, 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 are on the back of the main body. No adhesion to the formed anti-displacement pressure-sensitive adhesive layers 9, 9. When the individual packaging sheet 16 is peeled off, the main body release material 11 is peeled off together with the wing release material 12, 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 embodiments. Below, in order,
(1) In the above embodiment, the main body release material 11 and the wing release material 12 are separated from each other and firmly fixed so as not to be peeled off. The pressure-sensitive adhesives 9, 9... And the wings-stopping pressure-sensitive adhesives 10, 10 may be covered.
(2) In the above embodiment, a rectangular sheet is used as the wing release material 12, but as shown in FIG. 9, the wing release material 12 is cut from the outline of the napkin 1. May not extend outward.
(3) In the above-described embodiment, the wing temporary fixing pressure-sensitive adhesive layer 14 is directly bonded to only one end side of the front and rear end portions in the joint portion between the wing-shaped flaps W and W ( (A1 region), as shown in FIG. 10, the wings W, W may be joined directly at both ends of the front and rear ends.
(4) In the above example, when folding wing-shaped flaps W, W on the surface sheet 3 side, as has been so folded contain side outer peripheral flap F _S, shown in Figure 11, wing-shaped flaps W, You may make it fold only W part to the surface sheet 3 side.
(5) In the above embodiment, the wing-like flaps W, W is an outer vicinity of the absorber 4 side edges as a line, with the side periphery flaps F _S, it has been so folded liquid-permeable topsheet 3 side the inner position of the absorption side edge as a line, with the side edge portion of the side outer peripheral flap F _S and the absorber 4 may be folded into a liquid-permeable topsheet 3 side. In this case, further downsizing can be achieved.
(6) In the above example, the sanitary napkin 1 in which the wing-shaped flaps W, W are formed has been taken as an example, but the present invention has been described in detail. The same can be applied to the napkin.
(7) In the above example, the wing-shaped flaps W and W are formed by the side nonwoven fabric 6 and the liquid-impermeable back sheet 2, but the wing-shaped flap W may be formed by the side nonwoven fabric 6 alone. The wing-shaped flap W may be formed by the liquid-impermeable back sheet 2 alone.

DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Liquid impervious back sheet, 3 ... Liquid permeable top sheet, 4 ... Absorber, 5 ... Crepe paper, 6 ... Side nonwoven fabric, 9 ... Main body slip prevention adhesive layer, 10 ... Wing Anti-displacement adhesive layer, 11 ... release material for main body, 12 ... release material for wing, 14 ... temporary adhesive adhesive layer for wing, 15 ... adhesive for preventing curling, 16 ... individual sheet, 17 ... tab tape, 18 ... release Material, W ... Wing-shaped flap, F _S ... Side outer peripheral flap

Claims (5)

Wing-like flaps are formed on both sides of the body part where the absorbent body is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet so that the crotch part of the underwear is fixed when worn. In absorbent articles,
A main body anti-slip adhesive layer is formed on the liquid-impervious back sheet side surface of the main body part, and a wing anti-slip 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 a main body release material, and the anti-slip adhesive layer formed on the wing-shaped flap is covered with a wing release material that crosses the width direction,
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 either or both of the main body release material and the wing release material,
At the liquid-permeable surface sheet side, the leading ends of the wing-shaped flaps are overlapped, and the wing-shaped flaps are separated at the overlapping portions by a linear wing temporary fixing adhesive layer formed along the longitudinal direction of the absorbent article. In addition to the wing temporary fixing adhesive layer, the wings are directly joined at at least one of the front and rear end portions, and the other portions sandwich the wing release material. In addition, the adhesive strength obtained by indirectly joining the wings is set to be larger than the adhesive strength indirectly joined via the wing release material. An individual absorbent article characterized by that.   The individual absorbent article according to claim 1, wherein an outer surface of the wing-shaped flap is a plastic film.   The wing-shaped release material is detachably bonded to the outer surface of the wing-shaped flap at a portion where the wing-shaped flaps are indirectly joined with each other via a wing-shaped release material. The individually absorbent article according to crab. Claim 1-3 or the adhesive strength of the wing temporary fixing adhesive layer is bonded to the wing-shaped flaps to each other is set lower than the adhesive strength between the wing-fixing adhesive layer and the wing release material The individual absorbent article described in 1. The individual absorbent article according to any one of claims 1 to 4, wherein the release material for wing is subjected to a peeling treatment on a bonding surface side with respect to the anti-displacement adhesive, and a bonding strength reducing treatment is applied to the opposite surface. .

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