JP2018166681A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which fits parts around the legs without wrinkles by holding fitting properties between an absorber and the skin while improving the fitting properties around the legs by a tensile force of an elastic member or even when a wearer pulls the article up while wearing.SOLUTION: In an absorbent article which has an absorber of body fluid and a flexible side flap part extending outside from a side edge of the absorber, the side flap parts are joined in a back and forth direction at parts including at least the side edges of the side flap parts across notches toward a central side in a width direction from the side edges, via a gusset composed of the elastic member showing elasticity at least in the back and forth direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an absorbent article characterized by the shape of a side flap and fitting to the skin.

  Since the night pad and the day pad for long-time wearing (hereinafter also simply referred to as a pad) discharge a large amount of urine, the pad itself is enlarged and a flap is provided so as to cover the buttocks and legs. However, even if a flap is provided, the urine collection pad is flat and does not conform to the unevenness of the body, so that wrinkles are likely to be formed in the flap part around the leg when worn, and the folding of the flap due to the wrinkle leads to leakage. There is a problem of causing a deterioration of fit. The pad is required to follow the movement of the wearer's leg and improve the fit between the absorbent body and the skin (Patent Documents 1 and 2).

Japanese Patent No. 6044810 Japanese Patent No. 4364038

  However, in the conventional product, the stretchable sheet is arranged continuously in the front-rear direction, so that the absorbent body also shrinks together, and there is a problem that the fit between the absorbent body and the skin falls (Patent Document 1). Or patent document 2 is equipped with the elastic leg periphery sheet | seat pasted so that the whole surface of the said main-body part might be covered so that a main-body part has elasticity, and the shape of the leg periphery opening edge part is the time of mounting | wearing. An absorbent article that fits around the leg on the abdomen of the wearer is disclosed, but no specific means for fitting to the shape of the leg circumference is described (Patent Document 2). In addition, when the body part leg is pulled up to the wearer, the fit between the absorbent body and the skin is reduced, and a gap may be formed between the absorbent body and the skin, causing leakage.

  Therefore, the main problem of the present invention is to maintain the fit between the absorbent body and the skin while improving the fit around the leg by the tensile force of the elastic member, or even when the wearer pulls upward at the time of wearing. An object of the present invention is to provide an absorbent article of a body fluid such as a urine collecting pad, which can fit a product without wrinkles around.

  The absorbent article of the present invention that has solved the above problems is an absorbent article having an absorbent body fluid and a flexible side flap portion extending outward from a side edge of the absorbent body. The side flap portion extends in the front-rear direction by interposing a gusset made of a stretchable member exhibiting stretchability at least in the front-rear direction across the notch from the side edge toward the center in the width direction at a portion including at least the side edge of It is an absorptive article characterized by being connected.

  When an absorbent article having a body fluid absorber and a flexible side flap portion extending outward from a side edge of the absorber is pulled up above the wearer when worn, the absorbent article is shaped according to the shape of the leg. It is easy to generate wrinkles in the absorber due to the action of tensile force that works in various directions in the width direction. The absorbent article of the present invention has a gusset made of a stretchable material that exhibits stretchability at least in the front-rear direction, with the side edge of the side flap portion of the flexible sheet straddling a cut from the side edge toward the center in the width direction. By interposing and extending, it is possible to extend the closer to the side flap side edge according to the shape of the leg over the entire width direction, and the absorber can tilt from the front and rear direction in various directions, so that the product can be applied to the skin without wrinkles An absorbent article that can be fitted is provided. The gusset is a member added to allow a cloth (referred to as a base material) covering a certain space to be displaced in different directions, relax the cloth restraint, and ensure free deformation of the cloth surface. May be formed by joining the base and the surface edges of each other to form a continuous surface to form a gusset, and the gusset overlaps with the base material like a base material and a patch. It has a margin, and both sides facing each other in the overlap margin are connected to each other while forming a surface having a level difference equivalent to the cloth thickness, and the side flaps may be connected in the front-rear direction with a gusset interposed therebetween. . The gusset that is a constituent element of the present invention is a portion that includes at least the side edge of the side flap portion, and includes a stretchable member that exhibits stretchability in at least the front-rear direction. Depending on the material of the gusset, the elasticity can be variously configured, for example, using an elastic sheet, including rubber thread in the constituent material, folding the folds on the paper even if the material itself is not an elastic material, etc. . That is, the gusset includes the concept of a town that compensates for a shift in the direction of motion in the vicinity where the gusset is added, and more broadly, even if the elastic member, for example, the exterior sheet is in contact with the end face, The contact member may be in contact with the overlap. The gusset may be a pleated member that gives stretchability. An absorbent article is provided in which the side flaps are connected in the front-rear direction with a gusset made of such a stretchable member exhibiting stretchability at least in the front-rear direction.

  In addition, the gusset may have a configuration that spreads from the center in the width direction to the side edge of the side flap portion in a plan view.

  In the case of an absorbent article having the above-described configuration, the gusset having a shape spreading toward the end in a plan view over the side edge can be further extended. Since the side flap part is pulled more inclined from the front and rear direction than the inner side in the width direction, if the gusset is of equal thickness, the range of movement of the elastic material can be increased by increasing the extensibility of the outer side in the width direction depending on the shape. Providing an absorbent article that fits the product without wrinkles around the legs.

  In addition, the gusset straddling the cut from the side edge toward the center in the width direction may be configured to be bonded to the side flap portion before and after the cut with the non-adhered portion interposed therebetween.

  The side flap part has a larger tensile force on the outer side than the inner side in the width direction with respect to the front and rear direction, a large component force in the width direction acting from the center to the outer side, and an oblique external force with respect to the front and rear direction. Work to the absorber through. The direction and magnitude of the force changes depending on the position of the notch in the width direction, but the notch from the side edge toward the center in the width direction opens wider to the front and rear so that the force acting on the pad is released obliquely in the front-rear direction when the pad is pulled up. . The gusset that connects the side flaps in the front-rear direction across the cuts is bonded to the side flaps with the non-adhesive part sandwiched before and after the cuts. The non-adhered part is sandwiched so that the non-adhered part can be extended, and the shape of the non-adhered part is such that the shape of the non-adhered part extends in the width direction from the center toward the side edge of the side flap portion SF. It is glued. Thus, a specific configuration of the absorbent article that can be easily extended at a position far from the center side in the width direction of the incision, can release the force in various directions, and fits the product without wrinkling around the legs is provided.

  In addition, the side flap portion has a constricted portion, the gusset is on the rear side of the crotch portion of the constricted portion, and the gusset is configured to extend from the center side to the side edge of the side flap so as to expand in the plan view. be able to.

  On the front side from the crotch part of the side flap part having a constricted part, a force with a larger pulling angle acts on the outer side than the center side in the width direction, and the component force acting toward the outer side away from the center is large. In contrast, an oblique external force acts on the absorber through the side flap portion. There is a characteristic that the direction and magnitude of the force changes depending on the position of the cut in the width direction. As in this configuration, the configuration in which the gussets having a shape extending in the planar view from the center side to the side edge of the side flap portion from the crotch portion to the rear side is disposed, gradually extends toward the side edge at the position in the width direction of the cut. Therefore, it is possible to follow even if the force acting when pulling up the pad changes in the width direction. Even if a force with a larger pulling angle is applied to the side flap part of the part that is closer to the rear side from the crotch part than the inner side in the width direction with respect to the front-rear direction, the gusset is thus located on the rear side from the crotch part And, if the gusset has a shape that spreads from the center to the side edge of the side flap part and spreads in plan view, it can release force in various directions and absorbs the product without wrinkling around the legs Provide the goods.

  In addition, in the case of a side flap portion having a constricted portion, the gusset is configured to be in front of the crotch portion of the constricted portion, and the gusset extends from the center side to the side edge of the side flap portion and has a shape that expands in plan view. It can be.

  On the front side from the crotch part of the side flap part having a constricted part, a force with a large pulling angle is exerted on the outer side in the width direction with respect to the front-rear direction, and the component force acting from the center toward the outer side is large. An oblique external force acts on the absorber through the side flap portion. The direction and magnitude of the force changes depending on the position of the cut in the width direction. As in the present configuration, the configuration in which the gusset having a shape that spreads from the center to the side edge of the side flap portion from the crotch portion to the front side is disposed in the width direction of the incision gradually increases toward the side edge. Since the configuration increases, it is possible to follow even if the force acting when pulling up the pad changes in the width direction. Even if a force with a larger pulling angle is applied to the side flap part of the part that is closer to the front side from the crotch part than the inner side in the width direction with respect to the front-rear direction, the gusset is thus configured to be on the front side from the crotch part, and As long as the gusset is configured to extend from the center side to the side edge of the side flap portion and spread in the plan view, it is possible to release the force in various directions, and an absorbent article that fits the product without wrinkling around the legs. provide.

  As described above, according to the present invention, a stretchable member is provided to improve the fit around the leg, or even when pulled up to the wearer at the time of wearing, the fit between the absorbent body and the skin is maintained and the leg is wrinkled. The advantage is that the product can be fitted without any problems.

It is a schematic plan view which shows the inner surface side of the expansion | deployment state of the pad type disposable diaper which is one Embodiment of an absorbent article. It is a schematic plan view which shows only the principal part. It is YY sectional drawing of FIG. FIG. 3 is an enlarged schematic perspective view of one gusset of FIG. 2. It is a model perspective view at the time of pulling up at the time of mounting | wearing by the structure of FIG. It is a model perspective view which shows a gusset connection part by the structure of FIG. It is a model perspective view at the time of pulling up at the time of mounting | wearing by the structure of FIG. FIG. 5A is a schematic perspective view in which the stretchable material of the gusset has a plurality of linear elastic bodies in the configuration of FIG. 4. FIG. 5B is a schematic plan view of the gussets before connection showing the arrangement of the linear elastic bodies. It is a model perspective view of a triangular gusset part by the structure of FIG. It is a model perspective view of a rectangular gusset. 1A is a schematic cross-sectional view of a gusset disposed between a back sheet and an exterior sheet, FIG. 1B is a schematic cross-sectional view of a gusset disposed between a back sheet and a gather, FIG. 3 is a schematic cross-sectional view in which a gusset portion is disposed on the outer surface side of an exterior sheet. It is a principal part schematic top view which shows the modification of a notch | incision.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The term “groin” in the terminology of the present invention means a portion that corresponds to the crotch of the body at the time of use. Depending on the product, it is at or near the center in the front-rear direction of the article as shown in the figure. This is a predetermined range. In the case of having a narrow constricted portion in the middle in the front-rear direction of the article or in the middle in the front-rear direction of the absorbent body, it means a predetermined front-rear direction range in which the minimum width portion of one or both constricted portions is the center in the front-rear direction. Also, “front part (ventral part)” means the part in front of the crotch part, and “rear part (back part)” means the part in the rear part of the crotch part. If there is a narrow constricted portion in the middle of the direction, the front side of the crotch portion extending from the constricted portion to the left and right is the front portion (ventral portion), and the crotch extending from the constricted portion to the left and right A range on the rear side of the part is referred to as a “rear part (back part)”.

  FIGS. 1-4 is a figure which shows one Embodiment of the pad type disposable diaper (henceforth a pad) 200 which is the absorbent article which concerns on this invention. This pad-type disposable diaper 200 is an absorbent article having an absorbent body 23 of body fluid such as urine and a flexible side flap portion SF extending outward from a side edge 23e of the absorbent body 23. The side flap portion SF is connected to the front-rear direction LD by interposing a gusset 100 made of a stretchable member exhibiting stretchability at least in the front-rear direction LD at a portion including at least the side edge SFe of the side flap portion SF. This is an absorbent article.

  The specifications of the pad-type disposable diaper 200 according to this embodiment are as follows. The pad-type disposable diaper 200 has a crotch portion C2, and a front portion F2 and a rear portion B2 extending on both front and rear sides thereof. The dimensions of each part can be determined as appropriate. For example, the total length L (length in the front-rear direction LD) is about 350 to 700 mm, and the total width W1 is about 130 to 400 mm (however, wider than the width of the absorbent surface of the diaper). In this case, the front-rear direction length of the crotch portion C2 is about 10-150 mm, the front-side portion F2 is about 50-350 mm, and the rear-side portion B2 is about 50-350 mm. can do. Moreover, the width W3 of the crotch part C2 can be 150 cm or more, especially about 200-260 cm in the case of an adult.

  The flexible sheet of the pad-type disposable diaper 200 includes a liquid-permeable top sheet 22 that covers the absorbent body 23 from the skin side, a liquid-impermeable back sheet 21 that covers the absorbent body 23 from the clothing side, and the back sheet. It consists of the exterior sheet 27 laminated | stacked on the outer side of 21, and is extended from the side edge 23e of the absorber 23 to the outer side, ie, the left-right direction of the figure of the width direction.

  In the absorbent article, a portion of the flexible sheet extending outward from the side edge 23e of the absorbent body 23 to the outside from the side edge 23e of the absorbent body 23 is referred to as a side flap portion SF. In the embodiment shown in FIGS. 1 to 4, the flexible sheet is such that the top sheet 22 and the back sheet 21 extend to the left and right across the absorber 23, and the exterior sheet 27 is laminated on the back side of the back sheet 21. It protrudes to the left and right at the front and back. The embodiment shown in FIGS. 1 to 4 includes a stretchable member in which the side edge SFe of the side flap SF of the flexible sheet extending outward from the side edge of the absorbent body 23 is stretchable at least in the front-rear direction. The absorbent article characterized by being connected by the gusset 100 is shown.

  A liquid-impermeable back sheet 21 is provided on the clothes side (hereinafter also referred to as the back side) of the absorbent body 23 so as to protrude slightly from the periphery of the absorbent body 23. As the liquid-impermeable back sheet 21, in addition to a polyethylene film, a sheet having moisture permeability can be used without impairing the water barrier from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.

  Further, the outer surface of the liquid-impermeable back sheet 21 is covered with an exterior sheet 27 made of a nonwoven fabric, and this exterior sheet 27 protrudes outside the periphery of the back sheet 21 with a predetermined protrusion width. Yes. Various nonwoven fabrics can be used as the exterior sheet 27. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  The front side of the absorber 23 is covered with a liquid-permeable top sheet 22. Although the absorber 23 partially protrudes from the side edge of the top sheet 22 in the illustrated form, the width of the top sheet 22 can be widened so that the side edge of the absorber 23 does not protrude. As the top sheet 22, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  It is desirable to interpose the intermediate sheet 25 between the top sheet 22 and the absorber 23. This intermediate sheet 25 is provided to prevent the urine that has been absorbed by the absorbent body 23 from returning, and uses a material having low water retention and high liquid permeability, such as various nonwoven fabrics and mesh films. Is desirable. When the front end of the top sheet 22 is 0% and the rear end of the top sheet 22 is 100%, the front end of the intermediate sheet 25 is preferably located in the range of 0 to 11%. It is preferably located in the range of 92 to 100%. The width W4 of the intermediate sheet 25 is preferably about 50 to 100% of the minimum width W5 of the constricted portion 23n of the absorber 23 described later.

  At both ends of the pad-type disposable diaper 200 in the front-rear direction, the exterior sheet 27 and the liquid-permeable top sheet 22 are attached to the front and rear ends of the absorbent body 23 so as to extend to the front and rear sides, respectively. Part EF is formed. On both sides of the pad-type disposable diaper 200, the exterior sheet 27, the back sheet 21, and the top sheet 22, which are flexible sheets, are extended outward from the side edges 23 e of the absorber 23. Outside the side edge 23e of the absorber 23 is a region where the absorber 23 is not present, and is referred to as a side flap portion SF. In the present embodiment, a portion 24x outside the width direction of the gather sheet 24s forming the three-dimensional gathers 24 is formed in the entire front-rear direction on the inner surface of the portion extending from the left and right extending portions to the left and right side portions of the top sheet 22. It is pasted over. These bonded portions can be formed by hot melt adhesive, heat sealing, or ultrasonic sealing. When the exterior sheet 27 is not provided, the liquid-impermeable back sheet 21 can be extended to the left and right edges of the side flap portion SF instead of the exterior sheet 27 to form the outer surface side of the side flap portion SF.

  As a material for the gather sheet 24s, a plastic sheet or a melt-blown nonwoven fabric can be used, but from the viewpoint of touch to the skin, a nonwoven fabric that is water-repellent treated with silicon or the like is preferably used.

  A portion 24c on the center side in the width direction of the gather sheet 24s extends to the top sheet 22, and an elongated elastic member 24G is stretched along the front-rear direction at the end portion on the center side in the width direction. It is fixed with a melt adhesive or the like. As the elongated elastic member 24G, styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc., which are formed in a thread shape, a string shape, a belt shape, or the like. Ordinarily used materials can be used.

  Further, both gather sheets 24s are fixed by being bonded to the inner surface of the article (in the illustrated form, the surface of the top sheet 22 and the outer surface of the exterior sheet 27) across the entire front and rear direction of the gather sheets 24s, and at the center in the width direction. 24c is bonded and fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) at both ends in the front-rear direction, and is fixed to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment) between both ends in the front-rear direction. Absent. As shown in FIG. 1, the non-fixed portion is a portion that serves as a leakage prevention wall that stands up elastically with respect to the inner surface of the article (the surface of the top sheet 22 in the illustrated embodiment). It is located at the boundary between the fixed portion 24x on the outer side in the width direction at 24s and the inner portion 24c.

  The absorbent body 23 is basically made of a pulp fiber pile, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, and is obtained by mixing, adhering, etc., a superabsorbent polymer such as particulates as necessary. Can be used. The absorbent body 23 can be wrapped with a wrapping sheet 26 such as crepe paper as required, such as when mixing superabsorbent polymer particles. Further, the shape of the absorbent body 23 should be an appropriate shape such as a band shape having a constricted portion including a crotch portion, a relatively narrower front portion than the rear portion, a rectangular shape, a trapezoidal shape, or the like. Can do.

The fiber basis weight and the basis weight of the superabsorbent polymer in the absorbent body 23 can be appropriately determined, but the fiber basis weight is preferably about 100 to 600 g / m ^2, and the basis weight of the absorbent polymer is about 0 to 400 g / m ^2. Is preferable.

  The absorber 23 extends from the front portion F2 to the rear portion B2, and in the illustrated form, a predetermined portion at the front and rear in the middle in the front-rear direction including the crotch portion C2 is formed as a narrow constricted portion 23n. The minimum width W5 of the constricted portion 23n is preferably about 50 to 65% of the width W2 of the non-constricted portion located before and after the constricted portion 23n. When the front end of the article is 0% and the rear end of the article is 100%, the front end of the constricted portion 23n is preferably located in the range of 10 to 25%, and the rear end of the constricted portion 23n is 40 to 65%. It is preferable that the part which becomes the minimum width W5 of the constricted part 23n (minimum width part) is located in the range of 25 to 30%.

  Characteristically, as shown in FIG.1 and FIG.2, the pad 200 which is this absorbent article straddles the part which contains the side edge of side flap part SF over the notch which goes to the width direction center side from a side edge. In addition, gussets 100A, 100B and 101A, 101B (hereinafter also referred to as 100 etc., and shown as gussets 100 in FIGS. 5 to 11) made of a stretchable member exhibiting stretchability at least in the front-rear direction are interposed and absorbed. Absorbent article characterized in that side flap portions SF made of a flexible sheet such as an exterior sheet 27, a back sheet 21, and a top sheet 22 extending outward from the side edge of the body 23 are connected in the front-rear direction. It is.

  The side flap portion SF has notches 110 and 111 (shown by straight lines 110A, 110B, 111A, and 111B in FIG. 2 (hereinafter also simply referred to as 110 etc.)) from the side edge SFe toward the center in the width direction. As shown in FIG. 5, both edge portions 110X and 110Y of the cut 110 are connected in the front-rear direction by a gusset 100 made of a stretchable member exhibiting stretchability in at least the front-rear direction. The gusset 100 is connected to a portion including the side edge SFe of the side flap portion SF with a non-adhesive portion sandwiched between the outer surface (clothing side) of the exterior sheet and connects the front and rear directions of the side flap portion SF.

  As shown in FIG. 5, the gusset 100 may be a triangle 100 in plan view, and the gusset 100 has a shape that spreads from the center toward the side edge SFe of the side flap portion SF in the plan view. The closer to SFe, the larger the gusset 100 can be extended. Since the side flap portion SF is pulled from the inner side in the width direction with an inclination from the front-rear direction, if the gusset is of equal thickness, if the extensibility of the outer side in the width direction is increased depending on the shape of the side flap portion SF, Absorbent article that fits the product without any problem is provided.

  The effects of the invention when the disposable pad type diaper according to the embodiment of the present invention is mounted will be described in detail below. In the side flap portion SF, a force having a larger pulling angle acts on the front and rear direction LD on the outer side than the inner side in the width direction, and a large component force acts from the center toward the outer side. It acts on the absorber 23 through the flexible sheet which comprises side flap part SF. The direction and magnitude of the force changes at the position in the width direction such as the notch 110. As in this configuration, the notch 110 from the side edge toward the center in the width direction acts to release the direction of each force acting on the pad when the pad is pulled up in an obliquely forward / backward direction. The gusset 100 made of an elastic material (for example, made of an elastic sheet) that connects the 110Y in the front-rear direction has a shape that spreads in the width direction from the center toward the side edge of the side flap portion SF, for example, a triangle. . Such a gusset 100 is configured to be more easily extended as the position is farther from the center in the width direction of the cut 110. In one embodiment, in the configuration of FIG. 5, Z1 is elongated near the center in the width direction of the cut 110, while it can be further expanded to the extent of ZO near the side edge. In this way, the side flap portion SF has the gusset 100 that connects the side flaps in the front-rear direction across the cut 110 that extends from the side edge toward the center in the width direction, and both edge portions 110X and 110Y (see FIG. 5) of the cut. A configuration in which the gusset 100 is connected by a gusset 100 made of a stretchable member that exhibits stretchability at least in the front-rear direction, and the gusset 100 has a shape extending in the width direction WD from the center toward the side edge SFe of the side flap portion SF. If it is the structure which is, it can release force in various directions and provides the absorbent article which fits a product without wrinkles around a leg.

In one embodiment, as shown in FIG. 1 and FIG. 2, the side flap portion SF also has a constricted portion SFn corresponding to the shape of the side portion plan view of the constricted portion 23 n of the absorber 23. As will be described later, since the concentration of the tensile force is generated according to the shape of the constricted portion, there is room for improvement in the arrangement of the gusset. In one embodiment, the gusset 100 includes at least two in the front-rear direction with the crotch portion symmetrically sandwiched in the width direction from the crotch portion of the side flap constricted portion SFn to the front side 100A, 100B and the rear side 101A, 101B. There may be one by one. From the crotch part to the front side or the rear side, a force with a larger pulling angle acts on the outer side than the inner side in the width direction with respect to the front-rear direction, and a large component force acts on the outer side away from the center. The external force acts on the absorber through the side flap portion. As in the present configuration, two gussets 100A and 100B having a shape that spreads from the center to the side edge of the side flap portion SF from the crotch portion of the side flap constricted portion SFn to the front side are arranged in the center in the width direction. The configuration is a configuration in which the extension margin gradually increases toward the side edge at the position in the width direction of the notch 110, and can follow even if the force acting when the pad 200 is pulled up changes in the width direction. As in this configuration, two gussets 101A and 101B having a shape that spreads from the center toward the side edge of the side flap portion SF from the crotch portion C2 of the side flap constricted portion SFn to the side edge of the side flap portion SF are arranged in the center in the width direction. The configuration to be provided is a configuration in which the extension margin gradually increases toward the side edge SFe at the position in the width direction of the notch 110, and can follow even if the force acting when pulling up the pad 200 changes in the width direction. More specifically, the front side from the crotch part is near the boundary between the crotch part C2 and the front side F2, and includes the boundary. The rear side from the crotch portion C2 refers to the rear B2 portion in the vicinity of the boundary between the crotch portion C2 and the rear side B2, and includes the boundary.
The side flap portion SF includes at least the side edge SFe and a gusset 100 made of a stretchable member exhibiting stretchability at least in the front-rear direction is interposed so that the force is released to the left and right. It should be 1.5 times higher.

  As shown in FIGS. 4 to 10, the gusset 100 is provided with a cut 110 that extends from the side edge toward the center in the width direction in the side flap portion SF. In one embodiment, as shown in FIG. 6, the triangular gusset 100 having a shape widening toward the end in a plan view at a portion including the side edge SFe of the side flap portion SF with the notch 110 is a non-adhered portion before and after the notch 110. The side flap SF may be bonded to the gusset bonding areas 102 and 103, and the non-bonded portion may be bonded to form the bonding surface with the side flap SF before and after the notch 110. In a modification of one embodiment, as shown in FIG. 10, the gusset may be rectangular, and in the case of a rectangle, the separation distance of the non-adhesive part sandwiching the notch is gradually increased toward the side edge so that it is elastic at the adhesive part. It is preferable that the extension ability of the member is invalidated and the gusset shape after bonding is widened from the side edge to the triangle and the side edge, for example. The bonding may be performed by ultrasonic waves or hot melting bonding. The side flap portion SF and the gusset 100 are bonded at the hatched portion in FIG. 10, and the stretchable portion of the gusset 100 that is not bonded extends according to the tensile force. Since the shape of the stretchable part of the cut is triangular, the extension Z0 on the outer end side of the cut is easier to extend than the extension ZI from the center, and in FIG. 4 and FIG. The gusset portion shown can extend greatly on the outer end side of the cut as shown in FIGS. 5 and 7 by the load of the tensile force, and can follow the movement around the leg.

  The stretchable part of the gusset 100 may be a linear elastic body in a triangular region parallel to the base, for example, thread rubber may be embedded between two sheets by bonding means such as adhesion, and the thread rubber at the side edge portion by spreading toward the end. The longer the outer side, the larger the outer side can be configured (see FIGS. 8A and 8B).

  As shown in FIGS. 9 and 10, the notch 110 may be a notch closer to the side edge in the width direction than the gusset 100 and capable of opening from the inside to the side edge from the gathering sheet rising start point.

  As shown in FIG. 10, the gusset 100 may have a rectangular shape before connection. However, as described above, the gusset 100 is preferably configured to be more extensible toward the outer end of the cut by the shape of the non-adhesive region. In FIG. 10, the adhesive regions 102 and 103 are narrowed toward the side edges, and the shape of the non-adhesive region is extended to the side edge SFe of the side flap portion so as to be widened in plan view. This non-adhesive region is a side edge, and is preferably 5 mm or more in natural length and 15 mm or more when stretched.

  As shown in the XX sectional view of FIG. 1 shown in FIG. 11, (a) the gusset 100 is disposed between the back sheet 21 and the exterior sheet 27. (B) The gusset 100 may be disposed between the back sheet 21 and the gather sheet 24s, or (c) the gusset 100 is laminated with the elastic sheet 140 or the thread rubber sandwiched between the nonwoven fabrics 141 and 142, You may adhere to the outer surface side of the exterior sheet | seat 27 by an ultrasonic wave or a hot melt, for example. In the configuration (c), as shown in the drawing, the side flap portion SF cut by the cut 110 from the side edge toward the center in the width direction, more specifically, the gather sheet 24s, the back sheet 21, and the exterior sheet 27 are cut 110. The end faces 110X and 110Y are formed by the gusset 100, but the gusset 100 is bonded to the exterior sheet 27 on the outer surface of the left and right side flap portions SF via the bonding regions 102 and 103, The side flap portions are connected in the front-rear direction by the intervention of the gusset 100 that contacts the exterior sheet 27 of the side flap portion SF (see FIG. 11C). In relation to the laminated sheet configuration of the flexible side flap portion SF, (a) the gusset 100 may be bonded to at least one of the back sheet / exterior sheet, and (b) the gusset 100 and the back sheet. / The side flaps SF before and after cutting may be connected by adhesion to at least one of the gather sheets (see FIGS. 11A and 11B).

When the exterior sheet is unfolded, the cuts 110 in the front-rear direction in plan view are inclined to open toward the center in the front-rear direction in FIGS. 1 and 2, as (110A, 110B) or (111A, 111B) pair in the width direction. However, as shown in FIG. 12, the inclination may be an inclination in which two cuts (110A, 110B) or (111A, 111B) paired in the width direction open toward the front-rear direction end. Depending on the material, thickness, and length of the stretch material, the stretch material may be difficult to stretch, and depending on the physical properties and shape of the absorber, if it stretches easily, the leg can also be cut by an inclination that opens toward the front and rear ends. If it is made of a material that follows the movement of the surroundings and hardly stretches, it may be suitable to easily tilt at a larger angle as the inclination opening toward the center in the front-rear direction, and to follow the movement of the legs.
It is desirable that the gusset 100 has two or more left and right portions (base portions of the legs on the back side and the abdominal side) from the crotch portion C2 to the front side F2 and the rear side B2 of the constricted portion SFn of the side flap SF. .

<Explanation of terms in the specification>
When the following terms are used in the specification, they have the following meanings unless otherwise specified in the specification.
The “front / rear (vertical) direction” means a direction connecting the ventral side (front side) and the back side (rear side), and the “width direction” means a direction (left / right direction) orthogonal to the front / rear direction.
・ "Front side" means the skin side.
・ "Back side" means the clothing side.
-"Developed state" means a state where the plate is flattened without contraction or slack.
・ "Elongation" means elongation from natural length.
・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.

  INDUSTRIAL APPLICABILITY The present invention can be used for absorbent articles in general in addition to disposable diapers such as pad-type disposable diapers, pants-type or tape-type disposable diapers.

  B2 ... rear side part, C2 ... crotch part, F2 ... front side part, SF ... side flap part, SFe ... side edge, SFn ... constricted part, 23 ... absorber, 23e ... side edge of absorber, 200 ... pad type disposable Diaper, 100 ... gusset, 100A, 100B ... gusset, 101A, 101B ... gusset, 110 ... cut, 110A, 110B ... cut, 111A, 111B ... cut.

Claims (5)

In an absorbent article having a body fluid absorber and a flexible side flap portion extending outward from a side edge of the absorber,
A gusset made of a stretchable member that exhibits stretchability at least in the front-rear direction is interposed in a portion including at least the side edge of the side flap portion across a cut from the side edge toward the center in the width direction, and the side flap Absorbent article characterized in that the parts are connected in the front-rear direction.   The absorbent article according to claim 1, wherein the gusset has a shape that spreads from the center in the width direction to the side edge.   The absorbent article according to claim 2, wherein the gusset is bonded to the side flap portion before and after cutting with a non-adhered portion interposed therebetween.   The absorbent article according to claim 2, wherein the side flap portion has a constricted portion, and the gusset is on the rear side of the crotch portion of the constricted portion.   The absorbent article according to claim 2, wherein the side flap portion has a constricted portion, and the gusset is located in front of the crotch portion of the constricted portion.

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