JP6591833B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood and vaginal discharge, and in particular, to prevent displacement on the outer surface side of the back sheet in order to prevent displacement in the mounted state. The present invention relates to an absorbent article in which an adhesive layer is formed, the absorbent article having a structure in which the anti-displacement adhesive layers are difficult to adhere to each other even if the absorbent article is deformed at the time of wearing.

  Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, an incontinence pad, for example, as shown in FIG. 6, a liquid-impermeable back sheet 50 made of a polyethylene sheet or a polyethylene sheet laminated nonwoven fabric, and a nonwoven fabric Or the thing which interposes the absorber 52 which consists of cotton-like pulp etc. between the liquid-permeable surface sheets 51 which consist of a permeable plastic sheet etc. is known.

  As this type of absorbent article N, one or more adhesive layers 53, 53,... Are formed on the non-skin contact surface side in order to prevent misalignment in the mounted state, and the longitudinal direction of the napkin body The wing-shaped flaps W, W extending outwardly are integrally formed on both sides, and the pressure-sensitive adhesive layer 54 is formed on the surface (outer surface) of the wing-shaped flaps W, W on the liquid-impermeable back sheet 50 side. There is one in which 54 is provided.

  When fixing the absorbent article N to the underwear 60, as shown in FIG. 7, apply the absorbent article N locally, take out the wing-shaped flaps W, W protruding sideways from the underwear 60, Both wing-shaped flaps W, W are folded at folding lines RL, RL, and adhered to the outer surface of the crotch portion of the underwear 60 while the crotch portion of the underwear is wound.

  On the other hand, when the absorbent article N is individually packaged, the pressure-sensitive adhesive layers 53, 54, ... are covered with a release sheet made of paper or a film, and a packaging sheet is disposed on the outer surface side of the absorbent article N, The absorbent article N, the release sheet, and the packaging sheet were all tri-folded or quarter-folded in the longitudinal direction, the side edge portion was heat-sealed, and the unsealed portion was fixed with a tag tape or the like.

  Numerous improvements have been made on this type of absorbent article, and various means have been taken to increase the adhesion to the skin by suppressing misalignment and twisting during wearing. For example, in the following Patent Document 1, an embossed groove is formed along the longitudinal direction in the widthwise central portion of the absorbent article on the non-skin contact surface side of the absorbent body, and in the central region including the embossed groove. There is disclosed an absorbent article in which a slip prevention adhesive layer is not formed and a slip prevention adhesive layer is formed on both sides along the longitudinal direction of the absorbent article.

  Moreover, in the following patent document 2, the non-skin surface side of the back sheet is disposed on the non-skin side of the back sheet in the region where the absorber exists, and the non-slip portion is predetermined in the vertical direction. An absorbent article having a region in which a plurality of regions are arranged with their lengths facing in the width direction is disclosed.

  Further, in Patent Document 3 below, adhesive slip prevention means is formed on the underwear contact surface side, and a pair of left and right side-fitting embosses are formed on the absorbent body middle and / or on both sides of the absorbent body. In the formed absorbent article, the adhesive slip prevention means has at least two or more patterns having different lengths in the short direction of the absorbent article and is relatively short in at least the crotch region of the absorbent article. An absorbent article in which an adhesive misalignment pattern having a short length in the hand direction is disposed and an adhesive misalignment pattern having a relatively short length in the lateral direction is disposed in at least the front and rear end regions of the absorbent article. It is disclosed.

JP2012-95685A JP2012-50716A JP 2003-10245 A

  However, in any of the absorbent articles described in Patent Documents 1 to 3, as shown in FIG. 8 (A), the skin contact is improved in order to improve the fit of the absorbent body to the body and prevent side leakage or the like. Since the fit emboss 55 formed on the contact surface side and the adhesive layer 53 for preventing misalignment formed on the non-skin contact surface side are provided in a region overlapping in the thickness direction, FIG. As shown in FIG. 2, when the leg pressure is applied from the width direction both sides to the inside by the inner part of the base of the leg in the mounted state, the absorbent body contracts and deforms in the width direction with the fit emboss 55 as a base point. Along with this, there was a problem that the anti-slip adhesive layers adhered to each other and the adhesion to the undergarment could not be achieved.

  Further, as shown in FIG. 9, the front and rear regions 56, 56... Of the wing-shaped flaps W, W proximal end are crotch portions where the absorbent body 52 contracts inward in the width direction by the action of the leg pressure at the time of wearing. It hits the boundary between the area and the front and back area where leg pressure does not act, and it hits the area where leg pressure is repeatedly applied and released when the leg is moved back and forth in the wearing state, and the crotch part of the underwear is folded back Since the wing-shaped flap W adhered to the outer surface of the crotch portion of the underwear hits a region where a tensile force is likely to act, this is a region where particularly large distortion occurs. For this reason, when an anti-slipping adhesive layer is disposed in this region, the anti-slipping adhesive layers stick to each other and cannot be fixed to the underwear, and the absorbent article is distorted due to adhesion between the anti-slipping adhesive layers. Since the state is maintained, the adhesion with the skin surface may be impaired.

  Then, the main subject of this invention is providing the absorbent article which improved adhesion with a skin surface while preventing that a slip prevention adhesive layer adhere | attaches by deformation | transformation of the absorbent article at the time of mounting | wearing. .

In order to solve the above-described problem, as the present invention according to claim 1, the crotch portion of the underwear is wound around each side portion of the main body portion where the absorbent body is interposed between the liquid-permeable top sheet and the back sheet. In this way, a wing-shaped flap to be fixed was formed, an anti-slip adhesive layer was formed on the outer surface of the back sheet, and a pair of left and right fit embosses were formed by pressing from the skin side surface of the absorbent body In absorbent articles,
The anti- slip adhesive layer is formed in a region that does not overlap the thickness direction of the fit emboss and the absorbent article, and the anti- slip adhesive layer has a wing-shaped flap as a main body on the outer side in the width direction than the fit emboss. A crotch part adhesive portion formed so as to be included in a range in the front-rear direction of the absorbent article between the front end and the rear end of the base end portion that starts to extend outward in the width direction from the portion; and the crotch portion A front adhesive part and a rear adhesive part formed on the front side and the rear side of the adhesive part through a separation part to which the adhesive layer is not applied, respectively, and the front adhesive part is the wing-shaped flap The rear adhesive part is located on the front side in the front-rear direction from the rear end of the base end part of the wing-shaped flap, and the adhesive layer is not applied. Part is the wing-shaped Absorbent article, characterized in that are provided at the front end region and the rear end region of the proximal end portion of the flops are provided.

  In the first aspect of the invention, since the anti-slipping adhesive layer is formed in a region that does not overlap the thickness direction of the fit emboss and the absorbent article, both sides in the width direction are formed by the inner portion of the base of the leg in the mounted state. When the leg pressure is applied toward the inner side from the base, even if deformation occurs in which the absorbent body contracts in the width direction with the fit emboss as a base point, it is possible to prevent the adhesive layers of the anti-slip adhesive from sticking to each other. The problem that adhesion between the agent layer and the undergarment cannot be achieved can be solved.

Further, the anti-slipping adhesive layer has an absorption between a front end and a rear end of a base end portion at which the wing-shaped flap starts to extend outward in the width direction from the main body portion on the outer side in the width direction than the fit emboss. Formed between the adhesive part for the crotch part formed so as to be included in the range in the longitudinal direction of the adhesive article, and the front part and the rear side of the adhesive part for the crotch part via a separation part to which the adhesive layer is not applied . A front adhesive portion and a rear adhesive portion, wherein the front adhesive portion is positioned in front of the front end of the base end portion of the wing-shaped flap, and the rear adhesive portion is the wing-shaped flap. A separation portion, which is located on the rear side in the front-rear direction from the rear end of the base end portion and is not coated with the adhesive layer, is provided in the front end region and the rear end region of the base end portion of the wing-shaped flap . That is, the crotch part adhesive part and the front and rear part adhesive part are formed in an intermittent pattern along the front and rear direction on the outer side in the width direction from the fit emboss, and the separation part of the adhesive layer is formed of the wing-shaped flap. It is provided in the front and back region of the base end. Therefore, the front and rear regions of the wing-shaped flap base end, which are particularly prone to large distortion due to the action of leg pressure when worn, are intermittent portions of the pressure-sensitive adhesive layer. By acting as a region for releasing the twist when attached, even if the absorbent article is deformed in the front and rear regions of the wing-shaped flap base end, the adhesive layer between the anti-slip adhesive layers does not adhere, and the absorbent article is distorted. In addition to being suppressed, the adhesion between the surface of the absorbent article and the skin surface can be improved.

  As the present invention according to claim 2, there is provided the absorbent article according to claim 1, wherein the anti-slipping adhesive layer is formed at a position that does not overlap with a fold line for individually mounting the absorbent article.

  In the invention according to the second aspect, since the anti-slipping adhesive layer is formed at a position that does not overlap with the folding line for individually packaging the absorbent article, the absorbent article with the folds in the individual packaging state is forced. Thus, the adhesive layers can be prevented from sticking to each other by wrinkles in the width direction generated in the back sheet at the folding position.

  As an aspect of the present invention according to claim 3, the crotch portion adhesive portion includes an imaginary line connecting the one-side base end in the front-rear direction of one wing-shaped flap and the other-side base end in the front-back direction of the other wing-shaped flap; The absorptive article according to claim 1 or 2 provided in the central part of the direction of the direction of the above-mentioned wing-like flap which does not overlap with the imaginary line which has a diagonal relation with this.

  In the invention of claim 3, the crotch portion adhesive portion is connected to a virtual line connecting the one side base end in the front-rear direction of one wing-shaped flap and the other side base end in the front-rear direction of the other wing-shaped flap; Since it is provided in the central part in the front-rear direction of the wing-shaped flap that does not overlap with the imaginary line that is diagonally related to this, wrinkles occur when torsional deformation of the absorbent article with the wing-shaped flap as a base point occurs. Since the crotch adhesive portion is not located on the imaginary line that is easily diagonally related, it is possible to prevent the crotch adhesive portions from adhering to each other.

As the present invention according to claim 4, the absorbent article is a night absorbent article having a rear flap that extends outward on the rear side from the wing-shaped flap,
The slip-preventing adhesive layer formed on the outer side in the width direction from the fit emboss includes an adhesive part for a buttock formed with a space behind the adhesive part for the rear part. The absorbent article described is provided.

  In the invention of claim 4, in the night absorbent article having a rear flap that extends outward on the rear side from the wing-shaped flap, an anti-displacement pressure-sensitive adhesive layer formed on the outer side in the width direction than the fit emboss. As described above, the heel part adhesive part is formed at a distance to the rear side of the rear part adhesive part, thereby fixing the garment part to the underwear. It is preferable that a fold line for individually mounting the absorbent article passes through a separation portion between the rear adhesive portion and the heel adhesive portion.

  As the present invention according to claim 5, the right and left fit embosses are each formed in a plurality of strips spaced apart in the width direction, and the anti-displacement adhesive layer is formed between the fit embosses spaced in the width direction. Item 5. An absorbent article according to any one of Items 1 to 4 is provided.

  In the invention of claim 5, when the left and right fit embosses are formed in a plurality of strips spaced in the width direction, the thickness of the fit emboss and the absorbent article is between the fit embosses spaced in the width direction. By forming the anti-displacement pressure-sensitive adhesive layer so as not to overlap in the direction, adhesion between the pressure-sensitive adhesive layers due to deformation of the absorbent article can be prevented, and more secure fixation with the underwear can be achieved.

  As described above in detail, according to the present invention, it is possible to prevent adhesion of the anti-displacement pressure-sensitive adhesive layers due to deformation of the absorbent article at the time of wearing, and to improve adhesion to the skin surface.

It is a partial fracture development view of sanitary napkin 1 concerning the present invention. It is the II-II arrow directional view of FIG. It is sectional drawing (II-II arrow directional view of FIG. 1) of the sanitary napkin 1 which shows a mounting state. It is an expanded view of the sanitary napkin 1A for night. It is an expanded view of the sanitary napkin 1 which concerns on another form example. It is an expanded view of the conventional absorbent article N. It is a perspective view which shows a mounting state. The conventional absorbent article N is shown, (A) is a developed sectional view (a view taken along the line VIII-VIII in FIG. 6), and (B) is a worn sectional view. It is a top view which shows the mounting state of the conventional absorbent article N.

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

[Basic structure of sanitary napkin 1]
As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present invention has a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, or the like, and a permeate that quickly permeates menstrual blood or a cage. In order to maintain the shape of the absorbent body 4 and improve the diffusibility, if necessary, the liquid surface sheet 3, the absorbent body 4 made of cotton-like pulp or synthetic pulp interposed between the two sheets 2, 3 The crepe paper 5 surrounds the absorber 4. In addition, the outer edge portion of the liquid-impermeable back sheet 2 and the liquid-permeable surface sheet 3 is joined around the absorbent body 4 by an adhesive such as hot melt or an adhesive means such as heat seal, and absorbed on the outer periphery. The outer peripheral flap part in which the body 4 does not exist is formed. A fit emboss 10 is formed so as to surround the blood drainage site H by embossing from the surface side (skin contact surface side) of the liquid-permeable surface sheet 3. The crepe paper 5 is provided as necessary and may be omitted.

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, from the viewpoint of preventing stuffiness, those having moisture permeability tend to be used. This water-impervious and moisture-permeable sheet material is a microporous sheet obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, 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 the spunbond method is excellent in drapeability, and the thermal bond method and the air-through method are excellent in terms of being bulky and having high compression recovery properties.

  A part of the liquid-permeable surface sheet 3 extends laterally on each side of the main body portion where the absorbent body 4 is interposed between the liquid-permeable surface sheet 3 and the liquid-impermeable back sheet 2. Wing-like flaps W and W that are fixed by winding a crotch portion of the underwear when worn are formed by a part of the liquid-impermeable back sheet 2 that is also extended laterally. Yes.

  The absorbent body 4 interposed between the liquid-impermeable back sheet 2 and the top sheet 3 is, for example, a mixture of a highly water-absorbent resin in pulp, or a mixture of chemical fibers in the pulp and a high water absorption. A material mixed with a conductive resin is used. The absorber 4 is surrounded by crepe paper 5 as shown in the figure in order to keep its shape and rapidly diffuse menstrual blood, etc., as shown in the figure, and to prevent reversal of menstrual blood etc. once absorbed. Is desirable. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as molten 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. Further, as the absorber 4, an air-laid absorber that can reduce the bulk may be used.

  The absorbent body 4 may be mixed with synthetic fibers. As the synthetic fiber, for example, polyolefins such as polyethylene or polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used. It may be a mixture. In addition, a composite fiber such as a core-sheath fiber, a side-by-side fiber, or a split fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath can also be used. In the case of a hydrophobic fiber, it is desirable to use a synthetic fiber that has been surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

  Examples of the superabsorbent resin include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process of the highly water-absorbent resin having the water absorption performance, the water absorption force and the water absorption speed can be adjusted by adjusting the crosslinking density and the crosslinking density gradient. The content of the highly water-absorbent resin is desirably 10 to 60% of the weight of the absorber. When the content of the superabsorbent resin is less than 10%, sufficient absorbability cannot be provided, and when it exceeds 60%, the entanglement between the pulp fibers disappears, the sheet strength decreases, and tears, cracks, etc. Is likely to occur.

  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.

  In the sanitary napkin 1, as shown in FIG. 1, a pair of left and right fit embosses 10 are formed by squeezing at least from the skin side surface of the absorbent body 4. As shown in FIG. 2, the fit emboss 10 may be formed from the liquid-permeable surface sheet 3 to the absorber 4 by pressing from the outer surface (skin side surface) of the liquid-permeable surface sheet 3. 4 may be formed only on the absorbent body 4 by pressing from the skin side surface, or may be formed on the crepe paper 5 and the absorbent body 4 by pressing from the skin side surface of the crepe paper 5.

  The fit emboss 10 has the napkin surface in close contact with the skin surface by using the fit emboss 10 as a base point and raising the absorbent body 4 in the center in the width direction from the fit emboss 10 toward the blood drainage port of the wearer. In addition to facilitating the prevention of lateral leakage, the lateral diffusion of body fluid is suppressed. In the example shown in FIG. 1, it is formed in a generally oval closed shape that is long in the front-rear direction so as to surround the blood discharge port portion H, but at least the blood discharge port is not required even in such a closed shape. It may be formed on both sides of the portion H in the form of lines spaced apart from each other in the left-right direction substantially along the front-rear direction. Further, the linear portions along the substantially front-rear direction of the left and right pairs do not need to be straight lines as shown in FIG. 1, but are shown as curves that bulge inward or outward in the width direction, and FIG. Thus, you may form so that it may have two or more parts which bulge in the width direction inner side and outer side.

  The fit emboss 10 is in a region including at least the blood drainage port H, preferably in a region substantially the same as the longitudinal length of the base end portion of the wing-shaped flap W or longer in the longitudinal direction as shown in FIG. It is preferable to form a vertically long oval, elliptical or oval pattern that is long in the longitudinal direction of the napkin.

[Anti-adhesive adhesive layer]
As shown in FIG. 1, the non-skin contact surface of the main body portion where the absorbent body 4 is interposed between the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 (the liquid-impervious back sheet 2 .. Are formed on the outer surface of the main body by a predetermined coating pattern for fixing to the underwear. Moreover, wings prevention adhesive layers 21 and 21 are formed on the surface of the wing-shaped flaps W and W on the liquid-impermeable back sheet 2 side.

  As the pressure-sensitive adhesive that forms the anti-displacement pressure-sensitive adhesive layers 20 and 21, 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. Polyterpene resin, terpene phenol resin, etc., and examples of the plasticizer include monomer plasticizers such as trifresil phosphate, dibutyl phthalate, dioctyl phthalate, and polymer plasticizers such as vinyl polymers and polyesters. It is done.

  Examples of the method for applying the pressure-sensitive adhesive include well-known application methods (for example, spray application and blade coating) such as a contact-type slot method, a non-contact spiral method, an omega method, a beat method, and a curtain method. Etc.) can be employed.

  The main body displacement prevention adhesive layer 20 is formed in a region that does not overlap the fit emboss 10 and the napkin thickness direction in plan view of the sanitary napkin 1 shown in FIG. “Does not overlap in the thickness direction of the napkin” means that the main body displacement preventing adhesive layer 20 and the fit emboss 10 have no overlap allowance in plan view, and have a separating portion that is spaced in the napkin plane direction between them. It is.

Further, the body displacement preventing pressure-sensitive adhesive layer 20 is a plan view of the sanitary napkin 1 shown in FIG. 1, in the width direction outer side than the fitting embossing 10, the front-rear direction of the formation range and the napkin longitudinal direction of the wing-shaped flaps W The crotch portion adhesive portion 22 formed at a position overlapping with the crotch portion adhesive portion 22 and the front and rear portions of the crotch portion adhesive portion 22 are formed at predetermined intervals, respectively, and from the proximal end portion of the wing-shaped flap W in the front-rear direction. The front adhesive part 23 and the rear adhesive part 24 located on the end side of the front part are included.

  More specifically, the crotch adhesive portion 22 is a range in the front-rear direction of the napkin between the front end Wf and the rear end Wb of the base end portion where the wing-shaped flap W starts to extend outward in the width direction from the main body portion. It is formed so as to be included. That is, the crotch adhesive portion 22 is formed such that the length in the front-and-rear direction of the napkin is shorter than the length in the front-and-rear direction of the napkin between the front end Wf and the rear end Wb of the base end of the wing-shaped flap W. The front end of the adhesive portion 22 for the part is located behind the front end Wf of the base end portion of the wing-shaped flap W, and the rear end of the adhesive portion 22 for the crotch portion is positioned forward of the rear end Wb of the base end portion of the wing-shaped flap W Are arranged to be.

  The front pressure-sensitive adhesive part 23 and the rear pressure-sensitive adhesive part 24 are formed on the front side and the rear side of the crotch part pressure-sensitive adhesive part 22 via a separation part to which no adhesive layer is applied. That is, the main body displacement preventing adhesive layer 20 provided on both sides of the fit emboss 10 is not applied with the adhesive layer between the crotch adhesive part 22, the front adhesive part 23, and the rear adhesive part 24, respectively. By disposing the spaced-apart portion, it is intermittently formed along the front-rear direction. The front adhesive portion 23 is located on the front side in the front-rear direction from the front end Wf of the base end portion of the wing-shaped flap W, and the rear adhesive portion 24 is the rear end of the base end portion of the wing-shaped flap W. It is located behind Wb in the front-rear direction.

  Further, an intermittent slip-preventing adhesive layer 20 is formed along the front-rear direction in a region that does not overlap the fit emboss 10 and the napkin thickness direction at the central portion in the napkin width direction. It is preferable to form the anti-displacement pressure-sensitive adhesive layer 20 at the center portion in the width direction on the front side and the rear side from the fit emboss 10, and it is preferable not to form within the range surrounded by the fit emboss 10. Since the range surrounded by the fit emboss 10 is a portion that bulges to the skin side due to leg pressure from both sides in the width direction at the time of wearing (see FIG. 3), the anti-displacement adhesive layer 20 is formed in such a region. Then, it becomes easy to adhere | attach adhesives.

  In the sanitary napkin 1 having the above-described configuration, the main body displacement preventing adhesive layer 20 is formed in a region that does not overlap with the fit emboss 10 and the napkin thickness direction. Even when a deformation occurs in which the absorbent body contracts in the width direction with the fit emboss 10 as a base point when a leg pressure is applied from both sides in the width direction toward the inward side by the inner portion of the base of the leg, the main body slip prevention adhesive It is possible to prevent the layers 20 from sticking to each other, and the problem that the adhesion between the main body displacement preventing adhesive layer and the undergarment cannot be achieved is solved.

  Further, the main body misalignment-preventing adhesive layer 20 has a separation part where no adhesive layer is formed between the crotch part adhesive part 22 and the front and rear part adhesive parts 23, 24 outside the fit emboss 10 in the width direction. Wing-shaped flap base end that is particularly prone to large distortion due to leg pressure when worn, since the spaced-apart portions are respectively provided in the front end region and the rear end region of the base end portion of the wing-shaped flap W. Even if the napkin is deformed in the front and rear regions of the wing-shaped flap W base end, the separation portion is located in the front and rear regions (see FIG. 9) of the wing-like flap W, and the separation portion acts as a region for displacing the twist at the time of wearing. In addition, adhesion between the main body displacement preventing adhesive layers 20 does not occur, distortion of the napkin is suppressed, and adhesion between the napkin surface and the skin surface is improved. It becomes possible way.

  As shown in FIG. 1, it is preferable that the main body displacement preventing adhesive layer 20 is formed at a position that does not overlap with a fold line when the sanitary napkin 1 is individually mounted. A sanitary napkin 1 shown in FIG. 1 is a daytime sanitary napkin in which a wing-shaped flap W is provided at a substantially central portion in the front-rear direction of the main body portion. A trifold that folds the front end portion of the sanitary napkin 1 to the center side at the front fold line P1 and folds the rear end portion of the sanitary napkin 1 to the center side at the fold line P2 on the rear side of the wing-shaped flap W. It is what is done. At this time, it is preferable that the front fold line P1 is provided at a position passing through a separation portion between the crotch adhesive portion 22 and the front adhesive portion 23, and the rear fold line P2 is the crotch adhesive portion 22. It is preferably provided at a position that passes through a separation portion between the rear adhesive portion 24 and the rear adhesive portion 24. As a result, when the sanitary napkin 1 with the folded folds in the individual packaging state is forcibly deployed, the pressure-sensitive adhesive layers are bonded to each other by the wrinkles in the width direction generated in the liquid-impermeable back sheet 2 at the folding position. Can be prevented. The separation distance in the front-rear direction of the napkin between the fold lines P1 and P2 and the adhesive portions is 5 to 30 mm, preferably 5 to 20 mm, and more preferably 5 to 10 mm.

  As shown in FIG. 1, the crotch adhesive portion 22 is a virtual connecting the one side base end in the front-rear direction of one wing-shaped flap W and the other side base end in the front-back direction of the other wing-shaped flap W. It is preferable to provide in the center part of the front-back direction of the wing-shaped flap W which does not overlap with the line S and the virtual line S diagonally with this. The imaginary line S becomes a center line when the sanitary napkin 1 is torsionally deformed with the front end and the rear end of the wing-shaped flap W as a base point in the mounted state, and the imaginary line is formed by torsional deformation of the napkin. Wrinkles are likely to occur. Therefore, in this sanitary napkin 1, the crotch adhesive portion 22 is disposed at a position that does not overlap with the virtual line S, thereby preventing the adhesives from adhering to each other. The separation distance (shortest distance) between the virtual line S and the crotch portion adhesive portion 22 is 3 to 20 mm, preferably about 3 to 8 mm.

  Explaining the dimensions of each part of the main body displacement prevention adhesive layer 20, as shown in FIG. 1, the length L1 of the crotch part adhesive part 22 is 45 to 76 mm, preferably 60 to 70 mm. The length L2 of the separation part between the crotch adhesive part 22 and the front adhesive part 23 is 10 to 30 mm, preferably 15 to 25 mm. The crotch adhesive part 22 and the rear adhesive part The length L3 of the spacing part between the front and rear surfaces 24 is 10 to 30 mm, preferably 15 to 25 mm. The length L4 of the front pressure-sensitive adhesive part 23 is 10 to 50 mm, preferably 15 to 25 mm. The length L5 of the rear adhesive section 24 is 5 to 30 mm, preferably 15 to 25 mm.

Moreover, the width | variety of the said main body slip prevention adhesive layer 20 is 3-30 mm, Preferably it is 5-15 mm. The basis weight of the adhesive, 20~30g / ^{m 2,} and it is preferably a 25 g / ^{m 2} approximately.

As a modification of the sanitary napkin 1, as shown in FIG. 4, the rear flap W _B extending outward at the rear side of the wing-shaped flaps _W, which has a W _B, this rear flap W _B not The case where the night sanitary napkin 1A in which the rear flaps-stopping adhesive layers 26, 26 are formed on the surface on the liquid-permeable back sheet 2 side will be described. Since this night sanitary napkin 1A is formed long rearward, it is preferable to further provide heel adhesive portions 25, 25 behind the rear adhesive portion 24 outside the fit emboss 10 in the width direction.

  Since the sanitary napkin 1A for night use is generally folded into four by folding at three fold lines P1, P2, and P3 when individually packaged, the adhesive portion 25 for the buttock is folded. It is preferable to form it at a position that does not overlap with the lines P2 and P3. In the example shown in FIG. 4, the heel adhesive portion 25 is formed between the fold lines P <b> 2 and P <b> 3 so as to be separated from the rear adhesive portion 24, but extends rearward from the fold line P <b> 3. At the same time, it may be formed intermittently spaced in the front-rear direction at the position of the fold line P3. The fold line P2 is preferably disposed so as to pass through a separation portion between the rear adhesive portion 24 and the heel adhesive portion 25.

  Further, in the sanitary napkin 1A for night use, a front-fitting emboss 11 for preventing a front leak, which is formed in a substantially inverted U shape, is separated from the front side of the fit emboss 10 surrounding the blood drainage port H. At the same time, there is a case where a rear fitting emboss 12 for preventing rear leakage formed in a substantially U shape is formed apart from the rear side of the fitting emboss 10. In this case, the main body displacement prevention adhesive layer 20 formed at the center part in the width direction of the napkin is intermittently formed at the front side of the fit emboss 10 at a position not overlapping with the front fit emboss 11 and the rear side of the fit emboss 10. In this case, it is preferable to form intermittently at positions that do not overlap the rear fit emboss 12.

  Next, as another modified example of the sanitary napkin 1, as shown in FIG. 5, a sanitary napkin 1B in which a pair of left and right fit embosses 10 are formed in a plurality of strips spaced apart in the width direction will be described. In this case, the main body displacement prevention adhesive layer 20 may be formed also between the fit embosses spaced apart in the width direction. In the illustrated example, linear embossed embosses 13 and 13 are formed along the front-rear direction of the napkin so as to be spaced apart from each other in the width direction of the fit emboss 10 having a substantially oval closed shape. Between the fit emboss 13, main body misalignment-adhering adhesive layers 27 and 27 are formed so as not to overlap the fit emboss 10 and both side fit emboss 13 and the napkin thickness direction. Thereby, while preventing adhesion of the adhesive layers due to the deformation of the napkin, it becomes possible to more firmly fix the underwear, and the both sides immediately in the center in the width direction to fit the blood drainage port H are the underwear. Since it is fixed, the adhesiveness with the skin at the center in the width direction is improved, and the leakage of body fluid can be prevented. The main body misalignment-preventing pressure-sensitive adhesive layer 27 is preferably provided at the central portion in the front-rear direction of the wing-shaped flap W that does not overlap the virtual lines S, S, like the crotch portion adhesive portion 22. The width of the main body displacement prevention adhesive layer 27 is preferably about 3 to 5 mm. Even when the left and right pair of fit embosses are provided in multiple layers, it is not always necessary to provide the main body displacement preventing adhesive layer 27 between the fit embosses.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Absorber, 10 ... Fit emboss, 11 ... Front fit emboss, 12 ... Rear fit emboss, 20 ... Body deviation Stop adhesive layer, 21 ... Wings anti-adhesive layer, 22 ... Crotch adhesive part, 23 ... Front adhesive part, 24 ... Rear adhesive part, 25 ... Bad adhesive part, 26 ... Rear flaps stopper Adhesive layer, P1 / P2 ... folding line

Claims (5)

Wing-like flaps are formed on both sides of the main body part where the absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and are fixed so as to wind the crotch part of the underwear when worn, In the absorbent article in which an anti-slip adhesive layer is formed on the outer surface of the back sheet, and left and right fit embosses are formed by pressing from the skin side of the absorbent body,
The anti- slip adhesive layer is formed in a region that does not overlap the thickness direction of the fit emboss and the absorbent article, and the anti- slip adhesive layer has a wing-shaped flap as a main body on the outer side in the width direction than the fit emboss. A crotch part adhesive portion formed so as to be included in a range in the front-rear direction of the absorbent article between the front end and the rear end of the base end portion that starts to extend outward in the width direction from the portion; and the crotch portion A front adhesive part and a rear adhesive part formed on the front side and the rear side of the adhesive part through a separation part to which the adhesive layer is not applied, respectively, and the front adhesive part is the wing-shaped flap The rear adhesive part is located on the front side in the front-rear direction from the rear end of the base end part of the wing-shaped flap, and the adhesive layer is not applied. Part is the wing-shaped Absorbent article, characterized in that are provided at the front end region and the rear end region of the proximal end of the flop.   The absorbent article according to claim 1, wherein the anti-slip adhesive layer is formed at a position that does not overlap with a fold line for individually packaging the absorbent article.   The crotch part adhesive portion includes an imaginary line that connects one base end in the front-rear direction of one wing-shaped flap and the other base end in the front-rear direction of the other wing-shaped flap, and a virtual line that is diagonally related thereto The absorbent article in any one of Claims 1 and 2 provided in the center part of the front-back direction of the said wing-shaped flap which does not overlap. The absorbent article is a night absorbent article having a rear flap extending outward on the rear side from the wing-shaped flap,
The slip-preventing adhesive layer formed on the outer side in the width direction from the fit emboss includes an adhesive part for a buttock formed with a space behind the adhesive part for the rear part. The absorbent article as described.   The left and right fit embosses are each formed in a plurality of strips spaced apart in the width direction, and the anti-displacement adhesive layer is formed between the fit embosses spaced in the width direction. Absorbent article.

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