WO2021020452A1

WO2021020452A1 - Absorbent article

Info

Publication number: WO2021020452A1
Application number: PCT/JP2020/029088
Authority: WO
Inventors: 敦子長谷澤
Original assignee: 大王製紙株式会社
Priority date: 2019-07-30
Filing date: 2020-07-29
Publication date: 2021-02-04
Also published as: JP7209600B2; JP2021020008A

Abstract

[Problem] To achieve improved fit against the body during wear and prevent liquid leakage even in an absorbent article not provided with three-dimensional gathers that project on the skin side on both sides of the skin contact surface side. [Solution] A sanitary napkin 1 in which side flaps SF that do not contain an absorbing body are formed on both sides of an absorbing body 4. The side flaps SF are not provided with wing-shaped flaps that are folded back so as to wrap around the outside of the crotch portion of the underwear during wear. The sanitary napkin 1 is individually packaged with the side flaps SF folded toward the skin contact surface side at longitudinal folding lines L that pass through the side edges of the absorbing body 4 or positions outside thereof, and is folded in the longitudinal direction at least at width direction folding lines W1, W2 that pass through a front side position and a rear side position, respectively, of a blood-discharge-orifice-facing part H. The side flaps SF are provided with compression parts 12 that start at or near the intersection of the longitudinal folding lines L and the width direction folding lines W1, W2.

Description

Absorbent article

The present invention relates to an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, etc., and more particularly to an absorbent article in which the side flaps on both sides of the blood drainage port facing portion stand up on the skin side when worn.

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 side flap portion in which an absorber does not intervene is formed by a joint portion with a side sheet.

In absorbent articles such as so-called light daily sanitary napkins and water-absorbing panty liners, which are mainly used when the amount of blood drained is small, elastic elastic members are arranged along the longitudinal direction on both sides on the skin contact surface side. In some cases, the three-dimensional gathers that stand up on the skin side due to the contraction force of this elastic elastic member are not provided. Such absorbent articles have advantages such as being comfortable to wear, thin and light, convenient to carry, and not affecting the outerwear, but on the other hand, when they are fixed to underwear and worn, the skin surface There was a drawback that a gap was easily formed between the skin and the wearer, and the wearer was likely to feel anxiety about leakage.

As a technique for improving the fit when worn, in the following Patent Document 1, in the anteroposterior range from the blood drainage port facing portion to the intergluteal cleft facing portion, both sides at a predetermined anterior-posterior direction position and the front and rear back surfaces thereof. Side darts are formed by joining each other, and the part between the side darts bulges to the front side due to the difference in length in the front-back direction on the front and back surfaces, and is configured as a bulging part that fits into the depression of the body. It is disclosed. Further, in Patent Document 2 below, the elastic elastic sheet is provided which is extended and fixed to the absorbent article in the longitudinal direction by fixing portions provided at least on the left and right sides in the longitudinal direction, and the elastic article is provided in the longitudinal direction of the absorbent article. A concave three-dimensional shape is formed on the skin contact surface side, and in the width direction of the absorbent article, a convex three-dimensional shape on the skin contact surface side is centered in the width direction in the region between the pair of the fixing portions. An absorbent article formed in the portion is disclosed.

Japanese Unexamined Patent Publication No. 2012-135520 Japanese Unexamined Patent Publication No. 11-299822

In the absorbent article described in Patent Document 1, by forming the side darts, the central portion in the width direction between the side darts bulges to easily fit the skin surface, but when three-dimensional gathers are not provided, , The fit between both sides of the absorbent article and the skin surface is deteriorated, which may cause liquid leakage. Similarly, in the case of the absorbent article described in Patent Document 2, if the three-dimensional gathers are not provided, the fit on both sides is lowered, and there is a risk of liquid leakage.

Therefore, the main problem of the present invention is to improve the fit to the body at the time of wearing even for an absorbent article in which three-dimensional gathers standing on the skin side are not provided on both sides of the skin contact surface side, and liquid leakage. The purpose is to provide an absorbent article that prevents the above.

In order to solve the above problems, as the present invention according to claim 1, an absorber is interposed between the liquid-permeable front sheet and the impermeable back sheet, and is absorbed by both sides of the absorber. In an absorbent article having a side flap formed without body intervention
The side flap portion is not provided with a wing-shaped flap that is folded back so as to wrap around the outside of the crotch portion of the underwear when worn.
In the absorbent article, the side flap portion is folded toward the skin contact surface side at the longitudinal folding line passing through the side edge of the absorber or the outer position thereof, and at least the front position of the blood drain port facing portion and the front position of the blood drain port facing portion and Folded in the longitudinal direction along the widthwise fold lines that pass through the rear positions and individually packaged.
An absorbent article is provided characterized in that the side flap portion is provided with a pressing portion starting from an intersection of the longitudinal fold line and the width direction fold line or a position in the vicinity thereof.

The invention according to claim 1 is an absorbent article in which the side flap portion is not provided with a wing-shaped flap that projects laterally. In such an absorbent article, similarly to the case where the wing-shaped flap is provided, the side flap portion is folded in the width direction toward the skin contact surface side by the longitudinal fold line, and then the width direction fold line is used. It is individually packaged by folding it in the longitudinal direction. At this time, the side flap portion is provided with a pressing portion starting from the intersection of the longitudinal fold line and the width fold line or a position in the vicinity thereof. As a result, when taken out from the individual packaging and attached to the underwear, the section sandwiched between the squeezed portions provided in front of and behind the left and right side flaps (the front-rear direction section corresponding to both sides of the blood drainage port facing portion). The side flap portion) will stand up on the skin side due to the folding habit during individual packaging, with the squeezed portion starting from the intersection of the longitudinal fold line and the width fold line or a position near the intersection as the base end. Since this upright side flap acts like a three-dimensional gather and the upright side end fits the body, elastic elastic members are arranged on both sides on the skin contact surface side, and the elastic elastic member contracts. Even for an absorbent article that is not provided with three-dimensional gathers that stand up on the skin side by force, the gaps between the absorbent article and the body on both sides are reduced, and liquid leakage is less likely to occur.

According to the second aspect of the present invention, the absorbability according to claim 1, wherein the squeezed portion is formed in a shape in which the squeezed portion gradually inclines toward the outside in the width direction in the direction opposite to the blood drain port facing portion. Goods are provided.

In the invention according to claim 2, when the absorbent article is taken out from the individual packaging, the squeezed portion is directed outward in the width direction so that the side flap portion can easily stand on the skin side with the squeezed portion as the base end. According to this, the shape is gradually inclined in the direction opposite to the blood drain port facing portion in the longitudinal direction.

According to the third aspect of the present invention, the squeezed portion on the width fold line along the section outside the longitudinal fold line in the width direction fold line adjacent to the front side and the rear side of the blood drain port facing portion.

Claims

1 and 2 are provided and a compression portion on the longitudinal fold line is provided along the longitudinal fold line between the widthwise fold lines adjacent to the front side and the rear side of the blood drain port facing portion. The absorbent article according to any one is provided.

In the invention according to claim 3, the squeezed portion on the width fold line and the squeezed portion on the width fold line are arranged along the width direction fold line and the longitudinal fold line arranged between the squeeze portions arranged before and after the left and right side flap portions, respectively. A squeezed portion on the longitudinal folding line is provided. Therefore, the U-shaped portion surrounded by each fold line tends to stand up on the skin side with the pressed portion formed on each fold line as the base end.

As the present invention according to claim 4, the absorbent article according to any one of

claims

1 and 2 is provided, wherein the squeezing portion is not provided along the width direction fold line and the longitudinal fold line.

The invention according to claim 4 is an example in which the squeezing portion is not provided along the width direction fold line and the longitudinal fold line. In this case, the fold in the width direction fold line and the longitudinal fold line is performed. Due to the habit, the side flaps of the section sandwiched between the front and rear squeezed parts tend to stand up on the skin side.

The absorbent article according to any one of claims 1 to 3, wherein the squeezed portion is formed in a straight line or a curved line having the same width or a shape gradually widening outward in the width direction as the present invention according to claim 5. Is provided.

The invention according to claim 5 defines the shape of the squeezed portion which is the standing base end of the side flap portion.

According to the sixth aspect of the present invention, the side flap portion is provided with a bulging portion that bulges outward in the width direction, and when the side flap portion stands up on the skin side at the time of mounting, the tip of the bulging portion is raised. The absorbent article according to any one of claims 1 to 5, which is in close contact with the skin surface, is provided.

In the invention according to claim 6, the side flap portion is provided with a bulging portion that bulges outward in the width direction. When taken out from the individual packaging, the side flap portion of the section sandwiched between the front and rear pressing portions stands up on the skin side with the pressing portion as the base end, so that the bulging portion stands up on the skin side at the time of wearing. The tip is in close contact with the skin surface.

As the present invention according to claim 7, the absorbent article according to any one of claims 1 to 6 is provided, wherein the side flap portion is temporarily fixed in a folded state along the longitudinal folding line and individually packaged. Will be done.

In the invention according to claim 7, when the absorbent article is individually packaged, the side flap portion is folded between the time when the side flap portion is folded toward the skin contact surface side and the time when the absorbent article is folded in the longitudinal direction. The side flaps are temporarily fixed in a folded state along the longitudinal folding line so that the folded state in the width direction is not released.

As described in detail above, according to the present invention, even if the absorbent article is not provided with three-dimensional gathers that stand up toward the skin on both sides of the skin contact surface side, the fit to the body when worn is improved. It can prevent liquid leakage.

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 a top view which shows the individual packaging procedure (the 1). It is a top view which shows the individual packaging procedure (the 2). It is a top view which shows the individual packaging procedure (the 3). It is a perspective view which shows the state which took out from the individual packaging. FIG. 7 is a view taken along the line VIII-VIII of FIG. (A) and (B) are plan views of the sanitary napkin 1 showing a modified example of the pressing portion 12. It is a top view of the sanitary napkin 1. It is a top view of the sanitary napkin 1 which concerns on the modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the sanitary napkin 1 according to the present invention is arranged on the skin side and the impermeable back sheet 2 made of a polyethylene sheet or the like arranged on the non-skin side. , A liquid-permeable surface sheet 3 that rapidly permeates menstrual blood, vaginal discharge, etc. (hereinafter collectively referred to as body fluid), and cotton-like pulp or synthetic pulp interposed between these two

sheets

2 and 3. The absorber 4 is provided with

side sheets

7 and 7 provided on both sides of the skin contact surface side over almost the entire length in the longitudinal direction, and the upper and lower end edges thereof are provided around the absorber 4. An end flap portion EF is formed in which the outer edge portion between the back surface sheet 2 and the front surface sheet 3 is joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal so that the absorber 4 does not intervene. At the same time, the back surface sheet 2 and the side sheet 7 extending laterally from the absorber 4 are joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal at both side edges thereof. The side flap portion SF is formed so that the absorber 4 is not interposed. 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, a non-woven fabric, or the like. It does not have to be provided. Further, a second sheet made of a hydrophilic non-woven fabric or the like having substantially the same shape as the surface sheet 3 may be arranged adjacent to the non-skin side of the surface sheet 3.

In the sanitary napkin 1 according to the present invention, three-dimensional gathers standing on the skin side are not formed on both side portions on the skin contact surface side due to the inner side portion in the width direction of the side sheet 7. That is, the elastic elastic member is not disposed on the inner side portion in the width direction of the side sheet 7, and the surface sheet 3 has a structure that does not stand up on the skin side due to the contraction force of the elastic elastic member. It is joined in a state of being laminated on the side surface of the skin.

The blood drainage port facing portion H is a region arranged to face the blood drainage port portion (including the vaginal opening) of the wearer when the sanitary napkin 1 is worn, and is in the longitudinal direction of the napkin. The range is located within the section between the widthwise folding lines W1 and W2 described later.

Hereinafter, the structure of the sanitary napkin 1 will be described in more detail.
As the back surface sheet 2, 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. On the non-skin side surface (outer surface) of the back sheet 2, one or a plurality of

adhesive layers

9, 9 ... Are formed along the longitudinal direction of the napkin, and in the illustrated example, three

adhesive layers

9, 9 ... Are formed, and the sanitary napkin is attached to the body. 1 is fixed to the underwear. As the back surface sheet 2, a polylami non-woven fabric in which a plastic film and a non-woven fabric are laminated may be used.

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 spunbond 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 that it is rich in flexibility and drapeability, and the thermal bond method is excellent in that it is bulky and has high compression stability. 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.

The sanitary napkin 1 is preferably a thin slim napkin with a low basis weight of the absorber 4. By lowering the basis weight of the absorber 4, the absorption capacity per unit area of the absorber 4 becomes smaller, and the body fluid easily diffuses in the plane direction. Therefore, by erecting the side flap portion SF, the effect of the present invention of preventing leakage from the end portion of the absorber 4 can be fully exhibited. The basis weight of the pulp is preferably 50 to 300 g / m ² , preferably 80 to 220 g / m ^2, and the basis weight of the superabsorbent polymer is 30 to 180 g / m ² , preferably 50 to 160 g / m. ^It is better to set it to ² . The basis weight of these pulps and superabsorbent polymers does not have to be constant and may vary depending on the site of the absorber. For example, a high absorption portion having a high basis weight of pulp and a super absorbent polymer can be formed in the portion H facing the blood drain port.

Further, as the absorber 4, an air-laid absorber whose bulk can be reduced or a polymer sheet in which a highly water-absorbent resin is arranged between two layers of non-woven fabrics may be used.

Synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, for example, a polyolefin type such as polyethylene or polypropylene, a polyester type such as polyethylene terephthalate or polybutylene terephthalate, a polyamide type such as nylon, and a copolymer 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 hydrophilic agent so as to have an affinity for body fluids.

In the illustrated example, the width dimension of the surface sheet 3 is substantially the same as the width of the absorber 4, as shown in the cross-sectional views of FIGS. 2 and 3, and only covers the absorber 4, and more than that. The outer side is a side sheet 7 different from the surface sheet 3, specifically, water repellent as appropriate for the purpose of preventing menstrual blood, vaginal discharge, etc. from penetrating, or enhancing the feel of the skin. A side sheet 7 constructed by using a treated or hydrophilically treated non-woven fabric material 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 on the outer portion from the intermediate portion in the width direction. A side flap portion SF in which the absorber 4 does not intervene is formed on both side portions of the absorber 4 by the laminated sheet portion of the side sheet 7 and the back surface sheet 2. 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) in a state of being laminated on the skin side of the surface sheet 3.

In the sanitary napkin 1, the side flap portion SF is not provided with a wing-shaped flap that is folded back so as to wrap around the outside of the crotch portion of the shorts when attached to the shorts. The side edge of the sanitary napkin 1 is located inside the side edge of the crotch part of the shorts when attached to the shorts, and is formed in a shape that does not protrude outside the outline of the opening around the legs of the shorts. The sanitary napkin 1 is attached so that the side portion of the sanitary napkin 1 is not sandwiched between the skin surface and the skin surface. The side edges of the side flap portion SF (outer lines on both sides of the sanitary napkin 1) may be a straight line parallel to the center line in the longitudinal direction, a curved line bulging inward or outward in the width direction, or a combination thereof. Further, wavy lines that repeat unevenness in the width direction may be superimposed. Further, as will be described in detail later, the intermediate portion in the predetermined longitudinal direction may be formed so as to bulge outward in the width direction.

As shown in FIG. 1, the skin contact surface of the surface sheet 3 in the main body portion where the absorber 4 is interposed blocks the body fluid that diffuses outward and is absorbed and held by the absorber 4. It is preferable that the embossed grooves 8 recessed on the non-skin side are formed in a predetermined pattern in order to facilitate, improve the fit with the body, improve the design and improve the appearance. The embossed groove 8 is a recess that is integrally recessed from the surface sheet 3 to the absorber 4 by pressing from the outer surface side of the surface sheet 3. In the illustrated example, it is formed in a closed substantially oval shape surrounding the blood drainage port facing portion H, but one embossed groove or a plurality of embossed grooves separated in the width direction on both sides of the blood drainage port facing portion H, respectively. Or decorative embossed grooves may be provided on the front side and the rear side of the blood drain port facing portion H, respectively.

As shown in FIG. 1, the non-skin contact surface (outer surface of the back surface sheet 2) of the main body portion in which the absorber 4 is interposed between the front surface sheet 3 and the back surface sheet 2 is used for fixing to underwear. One or more rows of anti-slip

adhesive layers

9, 9 ... Are formed along the longitudinal direction of the napkin. The slip-preventing adhesive layer 9 is detachably covered with a release sheet (not shown) in an individually packaged state. As the release sheet, a mold release treatment liquid such as a silicone resin, a fluororesin, or a tetrafluoroethylene resin is applied or sprayed to the contact surface with the slip prevention pressure-sensitive adhesive layer 9. Molded paper or plastic sheets can be used. The film itself or the non-woven fabric itself may be used as long as it does not substantially reduce the adhesive strength without any special mold release treatment. The slip-preventing adhesive layer 9 is provided only in the main body portion where the absorber 4 is interposed, and is not provided in the side flap portion SF.

Next, the method of individually packaging the sanitary napkin 1 described above will be described with reference to FIGS. 4 to 6. First, as shown in FIG. 4, the left and right side flap portions SF are respectively placed on the skin contact surface side (surface sheet 3 side) at the longitudinal folding line L passing through the side edge of the absorber 4 or the position near the outside thereof. ), Fold it in the width direction so that the skin contact surfaces face each other. Next, the sanitary napkin 1 is individually packaged by the individual packaging sheet 10 while being folded in a plurality of directions in the longitudinal direction. In the individual packaging by the individual packaging sheet 10, as shown in FIG. 5, the rear portion of the sanitary napkin 1 is individually packaged at the width direction folding line W1 passing through the rear position of the blood drain port facing portion H. After folding in the longitudinal direction toward the skin contact surface side (surface sheet 3 side) together with 10, at the width direction folding line W2 passing through the front side position of the blood drain port facing portion H as shown in FIG. The front part of the sanitary napkin 1 is folded in the longitudinal direction together with the individual packaging sheet 10 toward the upper side of the folded back side portion, and the open side edge portion of the individual packaging sheet 10 is embossed, heat-sealed, and adhesive. Such as, the sealing is performed by an appropriate sealing means alone or in combination, and the front and rear edge edges of the individual packaging sheet 10 are joined with an adhesive, and then sealed with a tab tape 11.

In order to maintain the state in which the side flap portion SF is folded in the width direction along the longitudinal folding line L, the side flap portion SF is temporarily fixed and individually packaged in a state of being folded along the longitudinal folding line L. It is preferable to do so. As a result, in the process of folding the side flap portion SF in the width direction and then folding the sanitary napkin 1 together with the individual packaging sheet 10 in the longitudinal direction, the state in which the side flap portion SF is folded in the width direction is not released, and the product is manufactured. Becomes easier. As the temporary fixing means, a known form can be widely used. For example, adhesion with an adhesive having an adhesive force enough to be easily peeled off by hand, crimping with a roller or the like, and high rigidity as a side sheet 7. It can be mentioned that a strong folding habit is added by using a material.

In the sanitary napkin 1, as shown in FIG. 1, the pressing portion 12 starting from the intersection of the longitudinal fold line L and the width fold lines W1 and W2 or a position in the vicinity thereof on the side flap portion SF. Is provided. That is, each of the left and right side flap portions SF is provided with a squeezing portion 12 immediately behind the widthwise folding line W1 provided on the rear side of the blood drainage port facing portion H, and the blood drainage port facing portion H. A pressing portion 12 is provided immediately on the front side of the widthwise folding line W2 provided on the front side.

Explaining the effect of the sanitary napkin 1 configured in this way, the sanitary napkin 1 does not have a wing-shaped flap that projects laterally on the side edge of the side flap portion, but the wing-shaped flap is not provided. The side flap portion SF is folded in the width direction along the longitudinal folding line L toward the skin contact surface side, and then folded in the longitudinal direction along the width direction folding lines W1 and W2. It is dressed up. At this time, the side flap portion SF is provided with a pressing portion 12 starting from the intersection of the longitudinal folding line L and the width-direction folding lines W1 and W2 or a position in the vicinity thereof. As a result, when taken out from the individual packaging and attached to the underwear, as shown in FIGS. 7 and 8, sections sandwiched between the

pressing portions

12 and 12 provided before and after the left and right side flap portions SF ( The side flap portions SF) of the anteroposterior section corresponding to both side portions of the blood drain port facing portion H come to stand up on the skin side due to the folding habit at the time of individual packaging, with the squeezed portion 12 as the base end. Since the standing side flap portion SF acts like a three-dimensional gather and the standing side end fits the body on both sides of the blood drain port facing portion H, the three-dimensional standing on the skin side on both sides on the skin contact surface side. Even if the sanitary napkin is not provided with gathers, the gaps between the sanitary napkin 1 and the body on both sides thereof are reduced, and liquid leakage is less likely to occur. Moreover, since the side flap portion SF is configured to stand up on the skin side without the elastic elastic member being arranged, both side portions of the blood drainage port facing portion H and the inner portion of the base of the leg when worn. It fits flexibly to the skin and is comfortable to wear without feeling any discomfort such as tightening.

In addition, the side flap portions SF stand up on both sides of the blood drain port facing portion H, and it is easy to follow the movement of the body like a three-dimensional gather, so that leakage can be prevented more effectively. Furthermore, the feeling that the standing side flap portion SF is always in contact with both side portions of the blood drainage port facing portion H or the base portion of the leg can be felt, so that the user's anxiety about leakage is reduced and the user can use it with a sense of security. You will be able to.

Further, in the sanitary napkin 1, after the side flap portion SF is folded in the width direction along the longitudinal folding line L, the sanitary napkin 1 is folded in the longitudinal direction along the width direction folding lines W1 and W2 and individually packaged. Therefore, when taken out from the individual packaging, as shown in FIG. 7, a mountain fold fold 14 that crosses the side flap portion SF in the width direction is formed before and after the side flap portion SF, and the side flap portion SF is widened. A valley fold crease 15 is formed along the longitudinal direction at the base end portion folded in the direction, and the side flap portion SF between the front and rear squeezed

portions

12 and 12 is formed by these

fold habits

14 and 15. Furthermore, it becomes easier to stand up on the skin side.

The squeezing portion 12 will be described in more detail. In the squeezing portion 12, the side flap portion SF in which the side sheet 7 and the back surface sheet 2 are directly laminated is squeezed from the outer surface side of the side sheet 7. A recess that is recessed on the non-skin side may be formed on the skin contact surface side, or a recess that is recessed on the skin side may be formed on the non-skin contact surface side by pressing the back surface sheet 2 from the outer surface side. It may be formed. When the side sheet 7 is formed by pressing from the outer surface side, it is preferable to apply the embossing groove 8 provided in the main body portion at the same time as pressing by the embossing roll when processing, from the viewpoint of simplifying the processing process. ..

The squeezed portion 12 is formed starting from the intersection of the longitudinal fold line L and the width fold lines W1 and W2 or the vicinity thereof. That is, the inner edge of the squeezed portion 12 in the width direction is located at or near the intersection. As a result, the side flap portion SF between the front and rear squeezed

portions

12, 12 is likely to stand up on the skin side with the squeezed portion 12 extending from this intersection as the base end. The squeezed portion 12 is arranged so as not to cross the longitudinal fold line L and the width direction fold lines W1 and W2 and not to intersect the fold lines L, W1 and W2 except for the inner edge in the width direction. ..

As shown in FIG. 1, the squeezed portion 12 is formed in a shape in which the sanitary napkin 1 is gradually inclined outward in the width direction and opposite to the blood drain port facing portion H in the longitudinal direction in a plan view. Is preferable. That is, the edge on the outside in the width direction is arranged at a position farther in the longitudinal direction from the blood drain port facing portion H than the edge on the inside in the width direction of the pressing portion 12. By providing the squeezed portion 12 in such a shape, the side flap portion SF can easily stand up on the skin side with the squeezed portion 12 as the base end in a state where the sanitary napkin 1 is taken out from the individual packaging.

The minimum separation distance between the squeezed portion 12 and the widthwise folding line W1 or W2 adjacent thereto in the longitudinal direction of the napkin is preferably 0 to 10 mm, preferably 0 to 5 mm, and more preferably 0 to 2 mm. The minimum separation distance between the squeezed portion 12 and the longitudinal folding line L in the napkin width direction is preferably 0 to 10 mm, preferably 0 to 5 mm, and more preferably 0 to 2 mm. By providing the starting point of the pressing portion 12 at a position close to the width direction folding lines W1 and W2 and the longitudinal folding line L, the side flap portion SF between the front and rear

pressing portions

12 and 12 has the skin with the pressing portion 12 as the base end. It becomes easier to stand on the side.

As shown in FIG. 1, the squeezed portion 12 can be formed by a straight line having the same width. Further, as shown in FIG. 9A, the area of the squeezed portion 12 is relatively large by forming a substantially triangular shape that gradually widens toward the outside in the width direction, and the front and rear squeezed portions 12 The side flap portion SF between the 12 may be made easy to stand on the skin side with the pressing portion 12 as the base end. Further, the squeezed portion 12 may be formed in a curved line as shown in FIG. 9 (B). The direction in which the curve bulges may be inside in the width direction as shown in the illustrated example, or conversely outside in the width direction.

As shown in FIG. 10, in order to ensure that the side flap portion SF with the pressing portion 12 as the base end stands up on the skin side, the front side and the rear side of the blood drain port facing portion H A squeezing portion 16 on the width fold line is provided along a section outside the longitudinal fold line L in the width direction fold lines W1 and W2 adjacent to the blood drainage port facing portion H, and the front side and the rear side of the blood drain port facing portion H. It is desirable that the pressing portion 17 on the longitudinal folding line is provided along the longitudinal folding line L between the widthwise folding lines W1 and W2 adjacent to the above. That is, along the width direction fold lines W1, W2 and the longitudinal fold lines L arranged between the

squeeze portions

12, 12 arranged before and after the left and right side flap portions SF, respectively, the squeeze portions on the width direction fold line. The 16 and the squeezing portion 17 on the longitudinal folding line are provided in a substantially U-shape in a plan view. By providing the squeezed

portions

16 and 17 along the fold line in this way, when the fold lines are bent, the creases on the fold lines that have hardened and increased in rigidity are clearly formed, and the folds cause the folds. , When taken out from the individual packaging, the side flap portion SF tends to stand up on the skin side. The squeezing direction when forming the width direction fold line top squeezing portion 16 and the longitudinal fold line top squeezing portion 17 is arbitrary, but the width direction fold line top squeezing portion 16 is a mountain fold protruding toward the skin side. Considering this, it is preferable that the outer surface of the back sheet 2 is squeezed from the outer surface side to form a recessed groove on the outer surface of the back sheet 2, and the squeezed portion 17 on the longitudinal folding line is on the non-skin side. Considering the valley fold that protrudes from the side sheet 7, it is preferable that the outer surface of the side sheet 7 is formed with a concave groove that is recessed on the non-skin side by pressing from the outer surface side of the side sheet 7. Further, the pattern may be a continuous line squeezed continuously along the direction in which the fold line extends, or as an intermittent line in which a plurality of pressed parts and non-squeezed parts are alternately arranged along the direction in which the fold line extends. May be good.

On the other hand, as shown in FIG. 1, the pressing portion along the width direction fold lines W1 and W2 and the longitudinal fold line L may not be provided. In this case, the side flap portion SF will stand up on the skin side due to the folding habit at the time of individual packaging.

Further, as another modification, as shown in FIG. 11, the side flap portion SF may be provided with a bulging portion 18 that bulges outward in the width direction. As a result, when the side flap portion SF stands up on the skin side at the time of wearing, the rising height toward the skin side is increased by the bulging portion 18, and the tip of the bulging portion 18 comes into close contact with the skin surface. Leakage can be effectively prevented. Since the side flap portion SF stands up on the skin side with the front and rear

pressing portions

12 and 12 as the base ends, the bulging portion 18 is preferably formed between the front and rear

pressing portions

12 and 12. In the illustrated example, the bulging portion 18 is formed in a substantially straight line shape in the longitudinal direction having stepped portions at both ends in the longitudinal direction, but may be formed in a shape such as a curve bulging outward in the width direction. ..

[Examples of other forms]
In the above embodiment, the blood drain port facing portion H is located at the central portion in the longitudinal direction of the sanitary napkin 1, and the widthwise folding lines W1 and W2 that fold the sanitary napkin 1 in a plurality of longitudinal directions at the time of individual packaging are formed. The case of three folds provided on the front side and the rear side of the blood drainage port facing portion H has been described as an example, but the blood drainage port facing portion H is located near the front side of the sanitary napkin 1 and drains. A sanitary napkin 1 having a plurality of folds in four or more folds provided with a plurality of fold lines in the width direction on the rear side of the blood port facing portion H may be used. In the case of a sanitary napkin 1 that is folded in four or more, the squeezing portion 12 is provided only in the vicinity of the widthwise folding lines W1 and W2 provided immediately in front of and behind the blood drain port facing portion H, respectively. It is not provided near the outer widthwise fold line.

1 ... Sanitary napkin, 2 ... Back sheet, 3 ... Front sheet, 4 ... Absorber, 5 ... Encapsulation sheet, 7 ... Side sheet, 8 ... Embossed groove, 10 ... Individual packaging sheet, 11 ... Tab tape, 12 ... Squeezed part, 14.15 ... Folding habit, 16 ... Width direction fold line upper squeezed part, 17 Longitudinal fold line upper squeezed part, 18 ... Swelling part, H ... Blood drainage port facing part, EF ... End flap part, SF ... Side Flap part, L ... Longitudinal fold line, W1 / W2 ... Width fold line

Claims

In an absorbent article in which an absorber is interposed between a liquid-permeable front sheet and a liquid-impermeable back sheet, and side flaps are formed on both sides of the absorber without the absorber.
The side flap portion is not provided with a wing-shaped flap that is folded back so as to wrap around the outside of the crotch portion of the underwear when worn.
In the absorbent article, the side flap portion is folded toward the skin contact surface side at the longitudinal folding line passing through the side edge of the absorber or the outer position thereof, and at least the front position of the blood drain port facing portion and the front position of the blood drain port facing portion and Folded in the longitudinal direction along the widthwise fold lines that pass through the rear positions and individually packaged.
An absorbent article characterized in that the side flap portion is provided with a squeezing portion starting from an intersection of the longitudinal fold line and the width direction fold line or a position in the vicinity thereof.
The absorbent article according to claim 1, wherein the squeezed portion is formed in a shape that gradually inclines toward the outside in the width direction toward the opposite side in the longitudinal direction from the portion facing the blood drain port.
A squeezing portion on the width direction fold line is provided along a section outside the longitudinal fold line in the width direction fold line adjacent to the front side and the rear side of the blood drain port facing portion, and the blood drain port facing portion is provided. The absorbent article according to any one of claims 1 and 2, wherein a squeezing portion on the longitudinal fold line is provided along the longitudinal fold line between the width fold lines adjacent to the front side and the rear side of the portion.
The absorbent article according to any one of claims 1 and 2, wherein a pressing portion is not provided along the width direction fold line and the longitudinal fold line.
The absorbent article according to any one of claims 1 to 3, wherein the squeezed portion is formed in a straight line or curve having an equal width or a shape gradually widening outward in the width direction.
The side flap portion is provided with a bulging portion that bulges outward in the width direction, and when the side flap portion stands up on the skin side during mounting, the tip of the bulging portion comes into close contact with the skin surface. The absorbent article according to any one of claims 1 to 5.
The absorbent article according to any one of claims 1 to 6, wherein the side flap portion is temporarily fixed in a state of being folded along the longitudinal folding line and individually packaged.