JP2020130788A - Absorbent article - Google Patents

Abstract

To provide an absorbent article in which wearing feeling does not deteriorate and lateral leakage can be prevented.SOLUTION: In a longitudinal direction section in which a wing-shaped flap W is formed, a standing wall formation sheet 10 is arranged on an external surface side of a side sheet 7, a base end side junction 11 for jointing the side sheet 7 and a surface sheet 3 is provided on a position which is separated from an end edge 7a of the side sheet 7 in a width direction outside, and an actuation side junction 12 for jointing the standing wall formation sheet 10 and the side sheet 7 is provided on a width direction center side position relative to the base end side junction 11. On the other hand, there is provided on a non-junction region 15 where the standing wall formation sheet 10 and the side sheet 7 are not jointed and which extends in a width direction outside of the actuation side junction 12. The standing wall formation sheet 10 comprises a standing wall holding adhesive layer 13 capable of fixing the standing wall formation sheet 10 in a manner of moving the standing wall formation sheet 10 in a width direction outside relative to the side sheet 7, when the wing-shaped flap W is folded and fixed to an underwear when wearing an absorbent article.SELECTED DRAWING: Figure 4

Description

The present invention is an absorbent article mainly used for sanitary napkins, pantyliner sheets, incontinence pads, toiletries, etc., and more specifically, side sheets arranged along the longitudinal direction on both sides of the skin side. However, the present invention relates to an absorbent article capable of standing up on the skin side arbitrarily in the area corresponding to the body fluid discharge portion of the wearer.

Conventionally, as the absorbent article, cotton-like pulp or the like is used between a liquid-impermeable back sheet such as a polyethylene sheet or a polyethylene sheet laminated non-woven fabric and a liquid-permeable front sheet such as a non-woven fabric or a liquid-permeable plastic sheet. A back sheet made of the absorbent body is interposed, and side sheets are provided on both sides of the skin contact surface side over almost the entire length in the longitudinal direction, and the back surface sheet extends laterally from the absorbent body. It is known that a pair of left and right wing-shaped flaps projecting laterally are formed in a region corresponding to a body fluid discharge portion of the wearer by a joint portion with a side sheet.

In order to fix the absorbent article to the underwear, after fixing the adhesive layer provided on the main body portion of the absorbent article to the crotch portion of the inner surface of the underwear, the wing-shaped flap protruding laterally is attached to the crotch portion of the underwear. Fold it back while entwining it so that the adhesive layer provided on the wing-shaped flap is adhered to the outer surface of the crotch portion of the underwear.

In order to prevent lateral leakage in which body fluid moves in the width direction and leaks from the side portion when worn, it is known that the side sheet is provided with various types of leakage-proof portions.

For example, Patent Document 1 below discloses a three-dimensional gather that stands high on the skin side by disposing an elastic elastic member along the longitudinal direction of the absorbent article. On the other hand, in Patent Document 2 below, side sheets are arranged along the longitudinal direction on both sides of the liquid-permeable surface sheet on the skin side, respectively, and the skin side of the laminated portion of the side sheet and the liquid-permeable surface sheet. Disclosed is an absorbent article in which a side emboss is formed by fusing the side sheet and a liquid-permeable surface sheet while denting toward the non-skin side. No elastic elastic member is arranged on this side sheet.

Japanese Unexamined Patent Publication No. 2008-295478 JP-A-2018-86170

However, as described in Patent Document 1, a three-dimensional gather that stands high on the skin side due to the contraction force of the elastic elastic member is effective in preventing lateral leakage because it stands high on the skin side. Especially in the case of three-dimensional gathers with a high standing height toward the skin, the contraction force of the elastic elastic member becomes large, and if it is worn for a long time, pain will occur due to rubbing of the part that hits the skin surface. It sometimes caused the deterioration of.

On the other hand, as described in Patent Document 2, if the elastic elastic member is not arranged and the side sheets are simply laminated on both sides of the liquid permeable surface sheet on the skin side, the side sheet is skin. It did not stand up to the side, and there was a risk of lateral leakage.

Therefore, a main object of the present invention is to provide an absorbent article capable of preventing lateral leakage without deteriorating the wearing feeling.

In order to solve the above problems, as the present invention according to claim 1, an absorber is interposed between the front surface sheet on the skin side and the back surface sheet on the non-skin side, and both side portions on the skin side are in the longitudinal direction. In an absorbent article in which side sheets are arranged over the entire length and wing-shaped flaps including the side sheets and back sheets are formed on both sides, respectively.
In the section in the longitudinal direction in which the wing-shaped flap is formed, a sheet for forming an upright wall is arranged on the outer surface side of the side sheet, and the side sheet is separated outward in the width direction from the edge on the center side in the width direction. A base end side joint portion for joining the side sheet and the surface sheet is provided at such a position, and the upright wall forming sheet and the side sheet are joined at a position on the center side in the width direction from the base end side joint portion. While the working-side joint is provided, a non-joining region is provided in which the upright wall forming sheet and the side sheet extending outward in the width direction from the working-side joint are not joined.
When the absorbent article is attached, the wing-shaped flap is folded outward so as to wrap around the crotch portion of the underwear at a position on the outer side in the width direction of the upright wall forming sheet and overlap with the non-joining region. At the time of fixing, an adhesive layer for holding the upright wall is provided so that the upright wall forming sheet can be fixed to the outer surface of the underwear in a state of being moved outward in the width direction relative to the side sheet. An absorbent article characterized by this is provided.

In the invention according to claim 1, in the longitudinal section in which the wing-shaped flap is formed, the standing wall forming sheet is disposed on the outer surface side of the side sheet, and the side sheet is centered in the width direction. A base end side joint for joining the side sheet and the surface sheet is provided at a position separated outward from the edge of the base end in the width direction, and the upright wall is provided at a position on the center side in the width direction from the base end side joint. While the working side joint portion for joining the forming sheet and the side sheet is provided, the non-joining region where the upright wall forming sheet and the side sheet extending outward in the width direction from the working side joint portion are not joined is provided. It is provided.

Then, when the absorbent article is attached, the wing-shaped flap is folded outward so as to wrap around the crotch portion of the underwear at a position outside the width direction of the upright wall forming sheet and overlapping the non-joining region. When fixing to the outer surface of the underwear, an adhesive layer for holding the upright wall is provided so that the upright wall forming sheet can be fixed to the outer surface of the underwear in a state of being moved in the width direction relative to the side sheet. ing.

By moving the upright wall forming sheet outward in the width direction relative to the side sheet, a tensile force acts on the working side joint portion outward in the width direction, and the tensile force acts in the width direction from the base end side joint portion. The side sheet portion extending to the center side stands up on the skin side with the base end side joint as the base end. In this state, by fixing the adhesive layer for holding the upright wall to the underwear, the state in which the upright wall is formed can be maintained. If the adhesive layer for holding the upright wall is not fixed to the underwear, the upright wall is not formed. In this way, even if the elastic elastic member is not arranged on the side sheet, the upright wall can be arbitrarily formed by the central side portion in the width direction of the side sheet, so that lateral leakage is prevented without deteriorating the wearing feeling. become able to.

According to the second aspect of the present invention, the absorbent article according to claim 1, wherein the upright wall forming sheet is composed of the back surface sheet folded back toward the front surface sheet at the side edge of the wing-shaped flap. Provided.

The invention according to claim 2 is an example of the first embodiment of the upright wall forming sheet, which is composed of a back surface sheet folded back toward the front surface sheet at the side edge of the wing-shaped flap. Since the back sheet extends to the skin side, it is preferable to use a non-woven fabric that is flexible against the skin as the back sheet. In that case, an impermeable waterproof film is arranged between the back sheet and the absorber. Is preferable.

According to the third aspect of the present invention, in the upright wall forming sheet, the central side in the width direction is joined to the side sheet at the operating side joint, and the outer side in the width direction is joined to the back sheet at the joint. The absorbent article according to claim 1, which is composed of a sheet member, is provided.

The invention according to claim 3 is a second embodiment of the upright wall forming sheet, in which the central side in the width direction is joined to the side sheet at the working side joint and the outer side in the width direction is the back surface at the joint. It is composed of sheet members joined to the sheet. By joining the sheet members made of different members, the material can be saved, and a flexible non-woven fabric that touches the skin can be used as the sheet member.

According to the fourth aspect of the present invention, the upright wall forming sheet is disposed on the outer surface side of the back surface sheet, and is composed of a sheet member folded back toward the front surface sheet side at the side edge of the wing-shaped flap. The absorbent article according to claim 1 is provided.

The invention according to claim 4 is a third embodiment of the upright wall forming sheet, which is disposed on the outer surface side of the back surface sheet and folded back toward the front surface sheet side at the side edge of the wing-shaped flap. It is composed of members.

According to the fifth aspect of the present invention, in the front side and the rear side of the longitudinal section in which the wing-shaped flap is formed, the side sheet is a joint portion located on the center side in the width direction from the base end side joint portion. The absorbent article according to any one of claims 1 to 4 bonded to the surface sheet is provided.

In the invention according to claim 5, since the joint portion between the side sheet and the surface sheet forms an upright wall in the longitudinal section in which the wing-shaped flap is formed, the joint portion of the side sheet is used as the base end side joint portion. Although it is arranged at a position separated from the edge on the center side in the width direction to the outside in the width direction, since no standing wall is formed on the front side and the rear side from this, the joint portion on the base end side is located on the center side in the width direction. It is joined to the surface sheet at the located joint.

According to the sixth aspect of the present invention, the side edge of the side sheet on the center side in the width direction bulges toward the center side in the width direction in the intermediate portion in the longitudinal direction including the section in which the wing-shaped flap is formed. The absorbent article according to any one of Items 1 to 5 is provided.

In the invention according to claim 6, when the central portion of the side sheet in the width direction is erected on the skin side, the width of the side sheet is increased in the longitudinal section in which the erected wall is formed in order to increase the height of the erected wall. The side edge on the center side in the direction has a shape that bulges toward the center side in the width direction.

According to the seventh aspect of the present invention, the adhesive layer for holding the upright wall is formed at the central portion of the wing-shaped flap in the longitudinal direction, or is separated in the longitudinal direction, or extends over substantially the entire length of the wing-shaped flap. The absorbent article according to any one of claims 1 to 6 that extends continuously is provided.

In the invention according to claim 7, when the standing wall forming sheet is moved outward in the width direction relative to the side sheet, the center portion in the longitudinal direction of the wing-shaped flap is easily picked by hand, so that the center portion in the longitudinal direction is easily picked up. A separated portion of the adhesive layer is formed in the portion. Further, in order to increase the bonding strength of the adhesive layer for holding the upright wall to the underwear, it can be formed so as to extend continuously over substantially the entire length of the wing-shaped flap.

As described in detail above, according to the present invention, lateral leakage can be prevented without deteriorating the wearing feeling.

It is a partially broken development view of the sanitary napkin 1 which concerns on this invention. FIG. 2 is a view taken along the line II-II of FIG. FIG. 3 is a view taken along the line III-III of FIG. It is sectional drawing which shows the formation procedure of the standing wall at the time of mounting. It is a top view of the sanitary napkin 1 which concerns on the modification. It is a top view of the wing-shaped flap W which concerns on a modification. It is a top view which shows the folded state of the wing-shaped flap W at the time of individual packaging. (A) is a plan view and (B) is a view taken along the line BB of (A) showing the arrangement state of the release sheet 18 at the time of individual packaging. It is sectional drawing of the sanitary napkin 1A which concerns on 2nd form example. It is a partially broken development view of the sanitary napkin 1B according to the third embodiment. It is a XI-XI line arrow view of FIG. It is the XII-XII line arrow view of FIG.

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

[Example of first form]
As shown in FIGS. 1 to 3, the sanitary napkin 1 according to the first embodiment of the present invention is arranged on the back surface sheet 2 arranged on the non-skin side and the skin side, and also has menstrual blood and vaginal discharge. A liquid-permeable surface sheet 3 that rapidly permeates things (hereinafter collectively referred to as body fluids), and an absorber 4 made of cotton-like pulp or synthetic pulp interposed between these two sheets 2 and 3. And side sheets 7 and 7 provided on both sides of the skin contact surface side over a substantially entire length in the longitudinal direction, and around the absorber 4, the back surface sheet is provided at the upper and lower end edges thereof. The outer edge portion between 2 and the surface sheet 3 is joined by an adhesive such as hot melt or a joining means such as heat seal or ultrasonic seal, and both side edges thereof extend laterally from the absorber 4. The back surface sheet 2 and the side sheet 7 are joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal, and the area substantially corresponds to the body fluid discharge portion of the wearer (hereinafter, "corresponding to the body fluid discharge portion"). A pair of left and right wing-shaped flaps W, W are formed at the position on the side of the absorber in (also referred to as "region H"). In the illustrated example, in order to maintain the shape of the absorber 4 and improve the diffusivity, the absorber 4 is surrounded by an encapsulating sheet 5 made of crepe paper, non-woven fabric, or the like. It does not have to be provided. Further, in the illustrated example, a second sheet 6 made of a hydrophilic non-woven fabric or the like having substantially the same shape as the surface sheet 3 is arranged adjacent to the non-skin side of the surface sheet 3, but the second sheet 6 Does not have to be provided. Further, in this embodiment, a liquid-impermeable waterproof sheet 8 made of a polyethylene sheet or the like is arranged in a range covering the absorber 4 between the absorber 4 and the back surface sheet 2.

The region H corresponding to the body fluid discharge portion is a region arranged so as to face the body fluid discharge portion (including the vaginal opening) of the wearer when the sanitary napkin 1 is worn. The range in the longitudinal direction of the napkin is substantially the same as the range in the longitudinal direction of the wing-shaped flaps W and W formed on both sides.

Hereinafter, the structure of the sanitary napkin 1 will be described in more detail.
In the first embodiment, the back surface sheet 2 is formed by covering the waterproof sheet 8 and making the outer surface of the sanitary napkin 1 look and feel like a cloth. The back surface sheet 2 is preferably formed of a non-woven fabric. As the material fiber, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used, and the processing method is the spunlace method. , Span bond method, thermal bond method, air through method, needle punch method, etc. can be used for production. However, long-fiber non-woven fabrics such as spunbonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are preferable from the viewpoint of achieving both touch and strength. The back surface sheet 2 may be subjected to a water repellent treatment in order to prevent the exudation of body fluid. One or more adhesive layers (not shown) are formed on the non-skin side surface (outer surface) of the back sheet 2 along the longitudinal direction of the napkin, and the sanitary napkin 1 is fixed to the underwear when it is attached to the body. It has become like.

Next, as the surface sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. The material fibers constituting the non-woven fabric can be olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A non-woven fabric obtained by an appropriate processing method such as a method, a spunlace method, a spunbond method, a melt blown method, or a needle punching method can be used. Among these processing methods, in the present sanitary napkin 1, an air-through type thermal bonded non-woven fabric having a large interfiber gap (a non-woven fabric structure formed by a hot air treatment machine using heat-sealed fibers as a raw material) is particularly preferable. When a large number of through holes are formed in the surface sheet 3, the body fluid is rapidly absorbed, and the dry touch property is excellent. The fibers of the non-woven fabric may be either long fibers or short fibers, but it is preferable to use short fibers in order to give the texture of the towel cloth. Further, in order to facilitate the embossing treatment, it is preferable to use an olefin fiber such as polyethylene or polypropylene having a relatively low melting point. Further, a core-sheath type fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath, a side-by-side type fiber, and a composite fiber of a split type fiber can also be preferably used.

The absorber 4 interposed between the back surface sheet 2 and the front surface sheet 3 is composed of, for example, pulp and a super absorbent polymer. The super absorbent polymer is mixed in the pulp constituting the absorber, for example, as granular powder. Examples of the pulp include cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate, and coniferous pulp having a longer fiber length has more functions than broadleaf pulp. It is preferably used in terms of price.

Synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, for example, polyolefin-based synthetic fibers such as polyethylene or polypropylene, polyester-based materials such as polyethylene terephthalate and polybutylene terephthalate, polyamide-based materials such as nylon, and copolymers thereof can be used, and these two types can be used. It may be a mixture. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In the case of hydrophobic fibers, it is desirable to use the synthetic fibers surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

If necessary, the hydrophilic second sheet 6 arranged adjacent to the non-skin side of the surface sheet 3 may be one having hydrophilicity with respect to body fluids. Specifically, regenerated fibers such as rayon and cupra, and natural fibers such as cotton are used to make the material itself hydrophilic, or olefins such as polyethylene or polypropylene, polyesters, and polyamides are synthesized. Fibers obtained by surface-treating the fibers with a hydrophilic agent to impart hydrophilicity can be used. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can be used. It is desirable that the second sheet 6 and the absorber 4 (encapsulated sheet 5) are joined by a hot melt adhesive or the like. By joining the second sheet 6 and the absorber 4, the body fluid can be rapidly transferred from the second sheet 6 to the absorber 4.

In the illustrated example, the width dimension of the surface sheet 3 is slightly longer than the width of the absorber 4, as shown in the cross-sectional views of FIGS. 2 and 3, and only covers the absorber 4. On the outer side, a side sheet 7, which is different from the surface sheet 3, specifically, prevents menstrual blood, vaginal discharge, etc. from penetrating, or enhances the feel of the skin. A side sheet 7 constructed by using a non-woven fabric material that has been subjected to water treatment or hydrophilic treatment is arranged.

As the side sheet 7, one made of natural fiber, synthetic fiber, recycled fiber or the like and formed by an appropriate processing method can be used, but preferably, the basis weight is increased in order to enhance the hiding property of the body fluid. It is better to use enhanced non-woven fabric. Specifically, it is desirable to use a non-woven fabric produced with a basis weight of 13 to 23 g / m ² , and in order to reliably prevent the permeation of body fluids, a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, etc. A water-repellent treated non-woven fabric coated with is preferably used.

As shown in FIGS. 2 and 3, the side sheet 7 is bonded with an adhesive such as hot melt over a range from a predetermined inner position to the outer edge of the back surface sheet 2 from the intermediate portion in the width direction. The laminated sheet portion including the side sheet 7 and the back surface sheet 2 forms flap portions on both sides of the absorber 4 without the absorber 4 intervening. With this flap portion, a pair of left and right wing-shaped flaps W, W can be formed at a position on the side of the absorber that substantially corresponds to the region H corresponding to the body fluid discharge portion. Adhesive layers 9 and 9 are provided on the outer surface side (outer surface side of the back sheet 2) of the wing-shaped flaps W and W, respectively, and the wing-shaped flaps W and W are folded back at the base end when attached to the shorts. At the RL position, it is folded back to the opposite side and wrapped around the crotch part of the shorts to secure it. On the other hand, the inner side portion of the side sheet 7 is adhered to the absorber 4 side (the skin side surface of the surface sheet 3) at a predetermined position in a state of being laminated on the skin side of the surface sheet 3.

As the waterproof sheet 8, a sheet material having at least water-shielding property such as polyethylene is used, but it is desirable to use a sheet material having moisture permeability from the viewpoint of preventing stuffiness. The water-impervious / moisture-permeable sheet material has microporous properties obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. Sheets are preferably used. As the waterproof sheet 8, a polylami non-woven fabric in which a plastic film and a non-woven fabric are laminated may be used.

(Standing wall)
Next, the upright wall formed by the central side portion in the width direction of the side sheet 7 will be described. In the sanitary napkin 1, the standing wall forming sheet 10 is arranged on the outer surface side of the side sheet 7 in the longitudinal section in which the wing-shaped flap W is formed. The longitudinal section in which the wing-shaped flap W is formed is a longitudinal section in which the wing-shaped flaps W and W project outward in the width direction, and the front end and the rear end of the wing-shaped flap W are wing-shaped, respectively. It is a portion where the separation width of the wing-shaped flaps W and W on both sides is the narrowest on the front side and the rear side of the base end portion of the flap W.

In the sanitary napkin 1 according to the first embodiment, the upright wall forming sheet 10 is folded back toward the front surface sheet 3 at the side edge of the wing-shaped flap W and extends to the outer surface side of the side sheet 7. It is composed of two. That is, in the wing-shaped flap W, the skin side surface and the non-skin side surface of the side sheet 7 are each folded back at the side edge of the wing-shaped flap W and covered with the continuous back surface sheet 2.

As shown in FIG. 4A, in the section in the longitudinal direction in which the wing-shaped flap W is formed, the side sheet 7 is located outward in the width direction from the edge 7a on the center side in the width direction of the side sheet 7. It is joined to the surface sheet 3 by a base end side joint portion 11 provided at a separated position along the longitudinal direction. The base end side joint portion 11 is a portion that becomes a base end when an upright wall is formed by a side sheet 7 extending toward the center in the width direction from the base end side joint portion 11. The base end side joint portion 11 is provided in a continuous linear shape extending in the longitudinal direction of the sanitary napkin 1 over substantially the entire length of the section in which the upright wall forming sheet 10 is arranged. On the other hand, the side sheet 7 is not joined to the surface sheet 3 between the base end side joint portion 11 and the edge 7a on the width direction center side of the side sheet 7.

The position where the base end side joint portion 11 is provided is preferably 5 to 20 mm outward from the edge 7a on the center side in the width direction of the side sheet 7. The length from the edge 7a to the base end side joint 11 is substantially equivalent to the height of the standing wall when the standing wall is formed, and by increasing this length, it is higher on the skin side. An upright wall will be formed.

The side sheet 7 is folded back at the side edge of the back sheet 2 (wing-shaped flap W) arranged on the non-skin side of the sanitary napkin 1 at the flap portion extending outward in the width direction from the side edge of the absorber 4. Almost the entire surface of the laminated portion with the standing wall forming sheet 10) is joined by the joint portion 14.

Further, the upright wall forming sheet 10 is joined to the side sheet 7 by an operating side joint 12 provided along the longitudinal direction at a position on the center side in the width direction from the base end side joint 11. A portion extending outward in the width direction from the working side joint portion 12 is a non-joining region 15 that is not joined to the side sheet 7.

The actuating side joint 12 is located between the base end side joint 11 and the edge 7a on the center side in the width direction of the side sheet 7, and the upright wall forming sheet 10 is arranged. It is provided in a continuous line extending in the longitudinal direction of the sanitary napkin 1 over almost the entire length of the section. When forming the upright wall, the actuating side joint 12 forms an upright wall to which a tensile force is applied to erect the portion of the side sheet 7 extending to the center side in the width direction from the base end side joint 11 to the skin side. It is the part that becomes the operating part of time.

In the non-joining region 15, the standing wall forming sheet 10 is simply laminated on the outer surface side of the side sheet 7, and the standing wall forming sheet 10 slides on the surface of the side sheet 7 and is relative to each other. It is possible to move around. That is, in the sanitary napkin 1 according to the first embodiment, the standing wall forming sheet 10 continuously faces the outer surface side of the side sheet 7 in the width direction from the back surface sheet 2 folded back at the side edge of the wing-shaped flap W. While extending toward the center side, the intermediate portion is not joined to the side sheet 7, but is joined to the side sheet 7 only by the operating side joining portion 12 provided at the end portion on the center side in the width direction.

The standing wall holding pressure-sensitive adhesive layer 13 is provided at a position outside the width direction of the standing wall forming sheet 10 and overlapping the non-joining region 15 in the thickness direction. The adhesive layer 13 for holding the upright wall is on the outer surface of the surface sheet 3 side as shown in FIG. 4A in a deployed state in which the wing-shaped flap W is projected outward from the side edge of the absorber 4. It is provided. The upright wall holding pressure-sensitive adhesive layer 13 is a pressure-sensitive adhesive layer that is fixed to the outer surface of the shorts as needed at the time of mounting.

When the wing-shaped flap W is folded outward so as to wrap around the crotch portion of the shorts and fixed to the outer surface of the shorts when the sanitary napkin 1 is attached, the standing wall forming sheet 10 is relatively relative to the side sheet 7. The adhesive layer 13 for holding the upright wall can be fixed to the outer surface of the shorts in a state of being moved (sliding) outward in the width direction. As shown in FIG. 4B, the standing wall-holding pressure-sensitive adhesive layer 13 is in a deployed state in which the wing-shaped flap W is projected outward from the side edge of the absorber 4, and the standing wall-forming sheet 10 is formed. Is moved outward in the width direction so that it is located on the outer surface on the back surface sheet 2 side in a state where the folded end portion of the side edge is shifted outward in the width direction. By fixing the adhesive layer 13 for holding the upright wall to the shorts, the state in which the upright wall forming sheet 10 is moved outward in the width direction relative to the side sheet 7 can be maintained, and the width of the side sheet 7 can be maintained. The state in which the upright wall is formed can be maintained by the central portion in the direction.

Explaining the procedure for forming the upright wall, the upright wall holding adhesive layer 13 provided on the outer side in the width direction of the upright wall forming sheet 10 has a wing-shaped flap W as shown in FIG. 4 (A). As shown in FIG. 4B, the standing wall forming sheet 10 was moved to the outside in order to form the standing wall, which was arranged on the outer surface on the surface sheet 3 side in the unfolded state. It is designed to move to the outer surface on the back sheet 2 side. On the other hand, the working side joint 12 provided on the center side in the width direction of the standing wall forming sheet 10 moves the standing wall forming sheet 10 to the outside in order to form the standing wall, so that FIG. 4 (B) shows. As shown, the portion of the side sheet 7 that transmits the tensile force outward in the width direction to the side sheet 7 and extends toward the center in the width direction from the base end side joint portion 11 is the base end side joint portion. It will stand up on the skin side with 11 as the base end. After that, as shown in FIG. 4C, the wing-shaped flap W is folded outward so as to wrap around the crotch portion of the shorts, and the slip prevention adhesive layer 9 is fixed to the outer surface of the shorts and held upright. The adhesive layer 13 for use is fixed to the outer surface of the shorts, and a state in which an upright wall is formed by a portion of the side sheet 7 extending toward the center in the width direction from the base end side joint portion 11 is maintained.

As described above, in the sanitary napkin 1 according to the present invention, the upright wall can be formed by the central portion in the width direction of the side sheet 7 without disposing the elastic elastic member along the longitudinal direction on the side sheet 7, so that the wearing feeling is comfortable. It becomes possible to prevent lateral leakage without deteriorating. Further, when the upright wall is formed, since the upright wall forming sheet 10 is arranged on the outside of the side sheet 7, the upright wall has a double sheet structure, and the effect of preventing lateral leakage is further improved.

On the other hand, the formation of the upright wall is arbitrary, and when only the slip prevention adhesive layer 9 of the wing-shaped flap W is fixed to the shorts without moving the upright wall forming sheet 10, the above-mentioned upright wall is formed. It is not formed, and the side sheet 7 can be mounted in a state where the central portion in the width direction is laminated adjacent to the surface sheet 3 over the entire length of the sanitary napkin 1.

Further, in the present sanitary napkin 1, the wing-shaped flap W has a structure in which a standing wall forming sheet 10 is further laminated in addition to a normal one composed of a laminated joint of a side sheet 7 and a back surface sheet 2. Therefore, the rigidity of the wing-shaped flap is higher than that of a normal one, and wrinkles and twists of the wing-shaped flap W can be reduced.

As shown in FIG. 1, the side sheet 7 is a joint located on the front side and the rear side of the longitudinal section in which the wing-shaped flap W is formed, and on the center side in the width direction of the base end side joint portion 11. It is preferable that the portion 16 is joined to the surface sheet 3. As a result, the upright wall is not formed in the region other than the longitudinal section in which the wing-shaped flap W is formed, and the wing-shaped flap W is arranged in close contact with the skin surface. The side edge of the joint portion 16 on the central side in the width direction is arranged with a separation width substantially equal to or within 4 mm of the edge 7a on the central side in the width direction of the side sheet 7.

In the embodiment shown in FIG. 1, the side edge of the side sheet 7 on the center side in the width direction is formed by a straight line extending in the longitudinal direction of the sanitary napkin 1, but as shown in FIG. 5, a wing-shaped flap is formed. In the middle portion in the longitudinal direction including the section in which W is formed, the shape may be formed so as to bulge toward the center in the width direction. As a result, an upright wall is formed in which the bulging portion stands up on the skin side, so that the height of the upright wall becomes high, and lateral leakage can be prevented more reliably. The shape of the bulging portion is arbitrary, and although it is arcuate in the illustrated example, it can also be rectangular, polygonal, or the like.

As shown in FIG. 4, the edge 10a on the width direction center side of the upright wall forming sheet 10 is at a position substantially equal to or more than the width direction center side of the side sheet 7 on the width direction center side. Although it may be arranged at a position extending in the width direction, it is preferable to arrange it at a position outside the edge 7a in the width direction as shown in FIG. 4 (A). Since the edge 10a of the upright wall forming sheet 10 is located outside the edge 7a of the side sheet 7 in the width direction, only the edge 7a of the side sheet 7 comes into contact with the skin surface in the state where the upright wall is formed. As a result, the standing wall feels soft against the skin and is comfortable to wear.

As shown in FIG. 1, the adhesive layer 13 for holding the upright wall is formed so as to be separated in the longitudinal direction at the central portion in the longitudinal direction of the wing-shaped flap W, so that the separated portion 17 is used as a handle portion. The operation of moving the upright wall forming sheet 10 at the time of mounting may be facilitated. As a result, the adhesive layer 13 for holding the upright wall is arranged in the front-rear direction of the separation portion 17 along the longitudinal direction.

On the other hand, as shown in FIG. 6, the adhesive layer 13 for holding the upright wall may be formed so as to continuously extend over substantially the entire length of the wing-shaped flap W. In this case, the bonding strength when the adhesive layer 13 for holding the upright wall is fixed to the shorts at the time of mounting can be increased.

In order to provide the slip-preventing adhesive layer 9 and the upright wall holding adhesive layer 13 on the wing-shaped flap W, as shown in FIG. 7, the wing-shaped flap W is folded toward the surface sheet 3 and wing-shaped. With the tip of the flap W folded outward in the width direction, the slip prevention adhesive layer 9 and the upright wall holding adhesive layer 13 are applied at predetermined positions. After that, as shown in FIG. 8, a release sheet 18 that integrally covers the slip prevention adhesive layer 9 and the upright wall holding adhesive layer 13 is arranged, folded in the longitudinal direction, and wrapped in an individual packaging sheet. Therefore, it can be individually wrapped.

[Example of second form]
Next, the sanitary napkin 1A according to the second embodiment will be described with reference to FIG. In the second form example, the form of the standing wall forming sheet is different from that in the first form example. In the second embodiment, the upright wall forming sheet 10A is arranged on the outer surface side of the side sheet 7, the central side in the width direction is joined to the side sheet 7 by the operating side joint 12, and the outer side in the width direction is. It is composed of a sheet member 20 joined to the back surface sheet 2 by a joint portion 19 provided along the longitudinal direction on the side edge portion of the wing-shaped flap W. As described above, by using a sheet member separate from the back surface sheet 2 as the upright wall forming sheet 10A, the back surface sheet 2 is made of a waterproof member (the same material as the waterproof sheet 8 according to the first embodiment). The waterproof sheet 8 provided separately from the back surface sheet 2 in the first embodiment can be omitted. Therefore, the material can be reduced and the cost can be reduced.

As the sheet member 20, it is preferable to use a material that is soft to the touch (the same material as the back surface sheet 2 according to the first embodiment).

[Example of third form]
As shown in FIGS. 10 to 12, the sanitary napkin 1B according to the third embodiment has a different form of the standing wall forming sheet as compared with the sanitary napkin 1 according to the first embodiment. .. In the third embodiment, the upright wall forming sheet 10B is arranged on the outer surface side of the back surface sheet 2, and is folded back toward the front surface sheet 3 side at the side edge of the wing-shaped flap W to form the side sheet 7. It is composed of a seat member 21 extending to the outer surface side. The seat member 21 is provided only in the longitudinal section in which the wing-shaped flap W is formed, and is not arranged on the front side and the rear side thereof. The sheet member 21 is joined to the outer surface side of the back surface sheet 2, and both side portions are folded back to the front surface sheet 3 side at the side edges of the wing-shaped flap W, and the actuating side joint to the outer surface of the side sheet 7. It is joined at the portion 12. As described above, by using a sheet member separate from the back surface sheet 2 as the upright wall forming sheet 10B, the back surface sheet 2 is made of a waterproof member (the same material as the waterproof sheet 8 according to the first embodiment). The waterproof sheet 8 provided separately from the back surface sheet 2 in the first embodiment can be omitted. Therefore, the material can be reduced and the cost can be reduced.

As the sheet member 21, it is preferable to use a material that is soft to the touch (the same material as the back surface sheet 2 according to the first embodiment).

1 ... Sanitary napkin, 2 ... Back sheet, 3 ... Front sheet, 4 ... Absorber, 5 ... Encapsulation sheet, 6 ... Second sheet, 7 ... Side sheet, 8 ... Waterproof sheet, 9 ... Anti-slip adhesive layer, 10 ... Standing wall forming sheet, 11 ... Base end side joint, 12 ... Acting side joint, 13 ... Standing wall holding adhesive layer, 14 ... Joint, 15 ... Non-joining area, 16 ... Joint, 17 ... Separation part, 18 ... Release sheet

Claims (7)

An absorber is interposed between the front surface sheet on the skin side and the back surface sheet on the non-skin side, side sheets are arranged on both sides of the skin side over the entire length in the longitudinal direction, and side sheets are arranged on both sides. In an absorbent article in which a wing-shaped flap including the side sheet and the back sheet is formed.
In the section in the longitudinal direction in which the wing-shaped flap is formed, a sheet for forming an upright wall is arranged on the outer surface side of the side sheet, and the side sheet is separated outward in the width direction from the edge on the center side in the width direction. A base end side joint portion for joining the side sheet and the surface sheet is provided at such a position, and the upright wall forming sheet and the side sheet are joined at a position on the center side in the width direction from the base end side joint portion. While the working-side joint is provided, a non-joining region is provided in which the upright wall forming sheet and the side sheet extending outward in the width direction from the working-side joint are not joined.
When the absorbent article is attached, the wing-shaped flap is folded outward so as to wrap around the crotch portion of the underwear at a position on the outer side in the width direction of the upright wall forming sheet and overlap with the non-joining region. At the time of fixing, an adhesive layer for holding the upright wall is provided so that the upright wall forming sheet can be fixed to the outer surface of the underwear in a state of being moved outward in the width direction relative to the side sheet. An absorbent article characterized by that. The absorbent article according to claim 1, wherein the upright wall forming sheet is composed of the back surface sheet folded back toward the front surface sheet at the side edge of the wing-shaped flap. The upright wall forming sheet is composed of a sheet member whose central side in the width direction is joined to the side sheet at the operating side joint and the outer side in the width direction is joined to the back surface sheet at the joint. Item 1. The absorbent article according to item 1. The absorption sheet according to claim 1, wherein the upright wall forming sheet is disposed on the outer surface side of the back surface sheet, and is composed of a sheet member folded back toward the front surface sheet side at the side edge of the wing-shaped flap. Sex goods. A claim in which the side sheet is joined to the surface sheet at a joint located on the center side in the width direction from the base end side joint on the front side and the rear side of the longitudinal section in which the wing-shaped flap is formed. Item 2. The absorbent article according to any one of Items 1 to 4. The aspect according to any one of claims 1 to 5, wherein the side edge on the center side in the width direction of the side sheet bulges toward the center side in the width direction in the intermediate portion in the longitudinal direction including the section in which the wing-shaped flap is formed. Absorbent article. The adhesive layer for holding an upright wall is formed at the central portion of the wing-shaped flap in the longitudinal direction at a distance in the longitudinal direction, or is continuously extended over substantially the entire length of the wing-shaped flap. The absorbent article according to any one of ~ 6.

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