TWI678196B - Absorbent article - Google Patents

Abstract

The absorbent article of the present invention is fixed to the absorbent body (5) in the back side (1R) with a pair of fixing members (8), and the absorbent core (40) in the lower part (1M) is formed with edges. Non-fiber stacking portion (45) extending in the longitudinal direction X. The fixing member (8) includes a stretchable side panel (6) and a hook-and-loop fastener (7) fixed to a side edge portion (5S) of the absorbent body (5). In the unfolded state of the absorbent body (5) and the natural state of the side panel (6), each of the pair of fixing members (8) is pulled out through the side panel fixing point (A) and the hook and loop fastener fixing point ( B) In the case of an imaginary straight line (L1), the back longitudinal end (45R) of the non-fiber piled portion (45) is located at or near the intersection (C) of the two imaginary straight lines (L1), and the non-fiber piled portion (45) The longitudinal longitudinal end (45R) from the dorsal side extends toward the ventral longitudinal end (40F) of the absorbent core (40) in the longitudinal direction (X).

Description

Absorbent article

The present invention relates to an absorbent article such as a disposable diaper, and more particularly to a deployment-type absorbent article having a fixing member.

Typical examples of the absorbent article include a ventral portion disposed on the ventral side of the wearer, a dorsal portion disposed on the dorsal side, and a lower portion of the condyle positioned therebetween, and provided with liquid permeation. A front sheet that is flexible, a liquid-impermeable back sheet, and an absorbent core that is disposed between the two sheets. In addition, as a disposable diaper which is an absorbent article, there has been known a deployment type disposable diaper having edges on both sides of a back side portion of an absorptive body including an absorptive core so as to extend from the side edge portion. A laterally stretchable stretchable side panel is attached to the laterally outwardly extending manner, and a fixing hook and loop fastener used when wearing a diaper is attached to the front end portion of each side panel in the extending direction. The deployment type disposable diaper having the above-mentioned configuration can be worn by stretching the hook and loop tape on the back side to the ventral side of the wearer and fixing the fixing portion of the tape to the outer surface of the ventral side.

Further, in the absorbent article, grooves having a weight per unit area smaller than that of the peripheral portion or through-holes penetrating the absorbent core in the thickness direction have been previously formed in a part of the absorbent core for various purposes. For example, Patent Document 1 describes that in order to allow the absorbent core to be easily bent in the lateral direction, two absorbent cores in the unfolded disposable diaper are symmetrically formed with respect to the centerline in the lateral direction as a bend. The groove portion of the mechanism extends in the longitudinal direction. In addition, Patent Document 2 describes that a plurality of groove portions extending in the longitudinal direction are formed in an absorbent core in a roll-up disposable diaper in order to improve the diffusibility and conformability of the excretory fluid.

Prior art literature Technical Literature

Patent Document 1: Japanese Patent Laid-Open No. 2004-141532

Patent Document 2: Japanese Patent Laid-Open No. 2005-34652

The present invention relates to an absorbent article, which has a longitudinal direction extending from the ventral side of the wearer to the back side via the crotch portion and a transverse direction orthogonal to the crotch portion, and in the longitudinal direction has a lower crotch portion which is disposed on the crotch portion when worn. A ventral portion disposed on the ventral side of the wearer more than the lower portion of the palate; and a dorsal portion disposed on the backside of the wearer more than the lower portion of the palate; The absorptive body composed of the formed absorptive core body is fixed on the back side portion of the absorptive body at both side edges in the longitudinal direction of the absorptive body so as to extend laterally outward from the side edge portions. For fixing members. The absorptive core in the lower part of the chin is formed with a non-fiber accumulation portion extending in the longitudinal direction. The pair of fixing members each include a stretchable side piece fixed to the absorbent body so as to extend laterally outward from a side edge portion of the absorbent body, and a front end extending in a direction extending from the side piece. The hook-and-loop fastener which is fixed to this side panel so that a part may be extended to the lateral direction outer side is comprised. In a case where the absorbent body is expanded into a flat shape to be unfolded and the side sheet is set to a natural state, the fixing portion of the side sheet and the absorbent body is located at the innermost part in the longitudinal direction and the outermost part in the lateral direction. The outer part is set as a side panel fixing point, and among the fixing parts of the above-mentioned hook-and-loop fastener and the side-sheet, the innermost part in the longitudinal direction and the outermost part in the lateral direction is set as a hook-and-loop fastener fixing point, and a pair of the fixing members is used. Each of them draws out an imaginary straight line L1 passing through the fixing point of the side panel and the fixing point of the hook-and-loop fastener. In this case, the longitudinal end of the back side of the non-fiber accumulation portion is located at the intersection of the two imaginary straight lines L1 or the intersection Near, and the non-fiber stacking portion extends longitudinally from the back longitudinal end toward the ventral longitudinal end of the absorbent core.

1‧‧‧diapers

1F‧‧‧ Ventral

1M‧‧‧ 胯 Lower

1R‧‧‧Back side

2‧‧‧ front sheet

3‧‧‧Back sheet

4‧‧‧ Absorber

5‧‧‧ Absorptive body

5F‧‧‧ ventral longitudinal end

5R‧‧‧Back side longitudinal end

5S‧‧‧Side edge

6‧‧‧ Side piece

6S‧‧‧Front end

7‧‧‧ Velcro

8‧‧‧Fixing members

9‧‧‧ fixed area

40‧‧‧ Absorbent core

40F‧‧‧ ventral longitudinal end

40R‧‧‧Back side longitudinal end

41‧‧‧Skin Covered Chips

42‧‧‧ Non-Skin Side Packing Chips

45‧‧‧Non-fiber accumulation section

45F‧‧‧ ventral longitudinal end

45R‧‧‧Back side longitudinal end

46‧‧‧Fiber accumulation section

50‧‧‧flank

51‧‧‧side sheet

52‧‧‧ Three-dimensional fold formation elastic member

53‧‧‧ Elastic member for forming leg folds

53F‧‧‧ ventral longitudinal end

53R‧‧‧Back side longitudinal end

55‧‧‧ ventral flanks

60‧‧‧Fixed section

61‧‧‧Flake material

62‧‧‧elastic member

70‧‧‧Fixed section

71‧‧‧ with substrate

72‧‧‧Fixed section

100‧‧‧ Wearer

A‧‧‧Side panel fixing points

B‧‧‧ Hook and loop fastener

C‧‧‧ intersection

CLx‧‧‧Vertical Centerline

L1‧‧‧imaginary straight line

L2‧‧‧imaginary straight line

X‧‧‧vertical

Y‧‧‧Horizontal

W‧‧‧ length

FIG. 1 shows the front sheet side, that is, the skin-facing side, in which the elastic member of each part of the absorbent body is extended to expand the disposable diaper as an embodiment of the absorbent article of the present invention into a flat state. Top view from the side.

FIG. 2 is a schematic cross-sectional view taken along the line I-I (the disposition portion of the non-fiber accumulation portion) of FIG. 1.

FIG. 3 is a schematic cross-sectional view taken along the line II-II (the arrangement portion of the fixing member) of FIG. 1.

FIG. 4 is a schematic rear view of the diaper as seen from the back of the wearer of FIG.

Fig. 5 is a schematic cross-sectional view of the lower part of the crotch in the diaper in the wearing state shown in Fig. 4.

The expanded absorbent article can exhibit its original performance by fixing the hook and loop fastener in an appropriate position, etc., and adopting an appropriate wearing state. The unfolded absorbent article described in Patent Documents 1 and 2 has a non-fibrous stacked portion of a substantially non-fiber-stacked core-forming material such as a groove portion or a through hole formed in the absorbent core. The formation position of the non-fibrous stacked portion is The relationship between the hook and loop fastener is not appropriate. Therefore, in the fastening operation of the hook and loop fastener, it is easy to form unexpected folds or bends on the front sheet and other components of the skin facing the diaper. There is still room for improvement. In the wearing state of the diaper, if there are unexpected wrinkles or bends on the front sheet, a gap will be created between the front sheet and the wearer's skin, and excretory fluid such as urine leaks out along the gap. Fear.

Therefore, the present invention relates to providing an absorbent article which can be applied to a crotch portion of a wearer of the wearer only by wearing it in accordance with a common method, even if the absorbent article is not particularly noticed during the wearing operation, and exhibits a high leakage prevention effect. .

Hereinafter, the absorbent article of the present invention will be described with reference to the drawings based on a disposable diaper which is a preferred embodiment. As shown in Figure 1, this implementation The disposable diaper 1 has a longitudinal direction X extending from the ventral side of the wearer to the back side through the crotch portion and a transverse direction Y orthogonal to the longitudinal direction X, and in the longitudinal direction X, the lower part 1M is disposed on the crotch portion when worn. ; The ventral portion 1F is disposed on the ventral side of the wearer more than the lower part 1M; and the dorsal portion 1R is disposed on the back of the wearer more than the lower part 1M. The lower iliac crest 1M includes a not-shown excretory portion facing the excretory portion of a wearer such as a penis when worn. The excretory portion facing portion is generally located at the center of the diaper 1 which is slightly biased toward the ventral side portion 1F. The ventral portion 1F, the lower crotch portion 1M, and the dorsal portion 1R correspond to the respective regions when the diaper 1 (absorbent body 5) is roughly divided into three equal parts in the longitudinal direction X.

The diaper 1 is a so-called expanded sheet disposable diaper, and includes: an absorbent body 5 having a liquid-permeable front sheet 2, a liquid-impermeable or water-repellent back sheet 3, and two sheets interposed therebetween. A liquid-retaining absorbent body 4 disposed between the materials 2 and 3; and a pair of fixing members 8, 8 which are fixed to both side edges 5S of the absorbent body 5 in the back side portion 1R along the longitudinal direction X , 5S. The diaper 1 is symmetrically formed with the longitudinal centerline CLx which divided it (absorbent main body 5) into two parts in the horizontal direction Y, and extended along the longitudinal direction X. The absorptive body 5 has a long rectangular shape in the longitudinal direction X in a plan view as shown in FIG. 1. The pair of fixing members 8 and 8 is fixed to the absorbent body 5 so as to extend from the side edges 5S and 5S of the absorbent body 5 in the back side portion 1R to the outer side in the lateral direction Y.

The front sheet 2 and the back sheet 3 each have a size larger than that of the absorbent body 4, and extend outward from the peripheral edge of the absorbent body 4, and the extended portions thereof are connected to each other by an adhesive, heat sealing, ultrasonic sealing, etc. They are joined to each other by known joining means. As the front sheet 2 and the back sheet 3, various kinds of those previously used for such absorbent articles can be used without particular limitation. For example, as the front sheet 2, various non-woven fabrics or perforated films can be used, and as the back sheet 3, a resin film or a laminate of a resin film and a non-woven fabric can be used. On the back sheet 3, for example, a form in which a liquid-impermeable film sheet alone is formed, and a form in which an exterior sheet is laminated on a non-skin-facing surface of the film sheet, that is, on the outer surface side, the exterior sheet Material Weaving.

The absorbent body 4 includes a liquid-retaining absorptive core 40, a skin-side encapsulating core material 41 covering the skin-opposing surface of the absorptive core 40, and a non-skin-opposing surface covering the absorptive core 40. The non-skin-side wrapping chip material 42 is configured. The absorptive core 40 has an hourglass shape that is inwardly contracted inward in the center of the longitudinal direction X in a plan view as shown in FIG. 1, and has a shape that is longer in the longitudinal direction X. The absorptive core 40 has a ventral longitudinal end 40F in the ventral portion 1F, a dorsal longitudinal end 40R in the dorsal portion 1R, and extends over the entire length of the longitudinal X of the lower part 1M. As shown in FIGS. 2 and 3, the skin-side encapsulating core material 41 has substantially the same size as the skin-facing surface of the absorbent core 40. In contrast, the non-skin-side encapsulating material 42 has a length Y in the lateral direction (that is, Width) is larger than the non-skin facing surface of the absorbent core 40. The wide non-skin-side encapsulating core material 42 covers the entire area of the non-skin facing surface of the absorptive core 40, and extends from both sides of the absorptive core 40 along the longitudinal direction X to the outer side of the lateral Y. The The extending portion is rolled up on the skin-side wrapping chip material 41 arranged to face the skin of the absorptive core 40, and covers both side edges of the skin-side wrapping chip material 41 in the longitudinal direction X.

In addition, in this specification, the "skin-facing surface" refers to the surface of the absorbent article or its constituent members (for example, the absorbent body 5) facing the wearer's skin side when wearing the absorbent article, that is, relatively close to wearing The "non-skin-facing side" of a person's skin is the side of the absorbent article or its constituent member that faces the skin side when wearing the absorbent article, that is, the side that is relatively far away from the wearer's skin. In addition, in this specification, "when worn" refers to a state in which a normal and appropriate wearing position is maintained, that is, a correct wearing position of the absorbent article, and a case where the absorbent article is shifted from the wearing position is not included. .

The absorptive core 40 is a single-layer structure in which fibers of a core-forming material including an absorptive material are stacked. As the absorptive material, those which are generally used as a material for forming such an absorptive core can be used without particular limitation. Examples include hydrophilic fibers such as wood pulp and synthetic fibers treated with a hydrophilizing agent, or water-absorptive polymerization物 粒。 Object particles. That is, the absorbent core 40 may be a fiber accumulation body of a hydrophilic fiber, or a water-absorbent polymer particle may be carried on this fiber. Stacked body. As the core material 41, 42, for example, paper, nonwoven fabric, or the like can be used.

As shown in FIGS. 1 and 2, the absorptive core 40 in the lower part 1M of the chin is formed with a non-fiber accumulation portion 45 extending in the longitudinal direction. More specifically, as shown in FIG. 1, in the diaper 1, a pair of non-fiber stacking portions 45, 45 extending in the longitudinal direction X is used to divide the diaper 1 into two parts in the lateral direction Y and extend in the longitudinal direction X. The center line CLx is formed symmetrically as a reference. Each of the non-fiber stacking portions 45 has a rectangular shape in a plan view, and its longitudinal direction is aligned in the longitudinal direction X. On the opposite side of the skin of the absorptive core 40, the length (i.e., width) in the transverse direction Y of each non-fibrous stacking portion 45 is fixed throughout its entire length in the longitudinal direction (longitudinal X). On the opposite side of the skin, the width of each of the non-fiber accumulation portions 45 is also constant throughout the entire length in the longitudinal direction.

As shown in FIG. 2, the non-fiber stacking portion 45 in the diaper 1 has no through-holes (that is, the unit area weight is zero) of the core-forming material constituting the absorbent core at all. However, in the non-fiber stacking portion of the present invention, in addition to the shape of the through-holes of the non-fiber stacking portion 45, it also includes a small amount (specifically, about 20 g / m2) in which there are a few regions other than the absorbent core. The core forms the material. The reason for this is that the non-fiber accumulation portion including a small amount of fiber accumulation portions also exhibits the same function and effect (liquid diffusion effect, etc.) as the non-fiber accumulation portion including a through hole. Considering the liquid diffusion effect and the like, a non-fiber deposition portion including a through hole is preferable to a non-fiber deposition portion including a small number of fiber deposition portions.

As shown in FIG. 1, the non-fiber stacking portion 45 is located more inward than the longitudinal longitudinal end 40F of the absorptive core 40 in the ventral portion 1F, and passes through the lower part 1M of the abdomen, and throughout the dorsal portion 1R. The back-side longitudinal end 40R of the absorptive core 40 is continuous further toward the inner side in the longitudinal direction X. That is, the non-fiber accumulation portion 45 has a ventral longitudinal end 45F at the ventral portion 1F, and the ventral longitudinal end 45F is located further inside the longitudinal X than the ventral longitudinal end 40F of the absorptive core 40 and at both longitudinal ends 45F Between 40F and 40F, a larger amount of the core-forming material constituting the absorbent core 40 is present than the non-fiber deposition portion 45. In addition, the non-fiber stacking portion 45 has a back-side longitudinal end 45R on the back-side portion 1R, and the back-side longitudinal end 45R is located further inside the longitudinal X than the back-side longitudinal end 40R of the absorptive core 40 and on both longitudinal ends 45R , 40R, compared to non-fiber The accumulation portion 45 has a larger amount of core forming material constituting the absorbent core 40.

The non-fiber stacking portion 45 (non-fiber stacking portion including a through hole) is formed in a fiber stacking step of a core-forming material such as wood pulp when the absorbent core 40 is manufactured, and is intentionally prevented from being formed by the core-forming material's fiber stack Of the part. The absorptive core 40 having the non-fiber stacking portion 45 can be manufactured according to a conventionally known method of manufacturing an absorptive core. For example, the core-forming material supplied by the air stream is sucked to the core-forming material formed in the drum. In a method for obtaining an absorbent core 40 by stacking on a forming mold on the outer peripheral surface, a forming mold using a specific pattern, for example, a portion corresponding to the non-fiber accumulation portion 45 may be projected upward compared to the peripheral portion. A molding die is manufactured as this molding die. In the absorptive core 40 obtained by the method described above, the portion where the core-forming material is not present is the non-fiber deposition portion 45. In addition, as another manufacturing method of the absorptive core 40 having the non-fiber deposition portion 45, a method can also be adopted in which the absorptive core without the non-fiber deposition portion is manufactured, and the absorptive core is specified The portion is subjected to post-processing such as punching or cutting to form a non-fiber accumulation portion. The above-mentioned absorbent core having a "non-fiber-stacked portion including a small amount of fiber-stacked portions" can also be produced by the above-mentioned method.

As shown in FIG. 2, in the non-fiber stacking portion 45, the skin-side covering material 41 and the non-skin-side covering material 42 are joined. With the above-mentioned configuration, the adhesion between the absorbent core 40 and the two sheets 41 and 42 is improved. Therefore, the shape retention of the absorbent core 40 disposed between the two sheets 41 and 42 is improved, even if the absorption is constituted. Absorptive materials such as water-absorbing polymer particles contained in the core-forming material of the absorbent core 40 swell due to absorption of excretion fluid such as urine, and the degree of deformation of the absorbent core 40 is also suppressed. Furthermore, the skin-side clad material 41 is bonded to the front sheet 2 with an adhesive, and the non-skin-side clad material 42 is bonded to the back sheet 3 with an adhesive. The above-mentioned configuration restricts The movement of the absorbent body 4 makes it difficult for the absorbent body 4 to move relative to the front sheet 2 or the back sheet 3 during the wearing of the diaper 1. Therefore, in the process of using the diaper 1, the absorbent body 4 (absorbent core 40) is not easily damaged, and excellent absorption performance can be stably exhibited. With the above-mentioned configuration, the absorbent cores 40 are aligned with each other. The drainability of the leaked liquid is improved, and the non-fiber accumulation portion 45 is effectively prevented from being buried due to the swelling of the absorbent material contained in the core-forming material.

The joining portion of the two sheets 41 and 42 in the non-fiber deposition portion 45 can be formed, for example, as follows. That is, an adhesive such as a hot-melt adhesive is applied in advance at a position corresponding to the non-fiber deposition portion 45 of at least one of the two sheets 41 and 42, and the absorbent core 40 is covered with the two sheets 41 and 42. After the absorbent body 4 is obtained, the sheet 41 and / or the sheet 42 are pressed into the non-fiber stacking portion 45, whereby the two sheets 41 and 42 can be joined at the non-fiber stacking portion 45. When the sheets 41 and 42 are pressed, a known embossing process such as embossing with or without heat or ultrasonic embossing can be used. In the diaper 1, as shown in FIG. 2, the joint portion of the two sheets 41 and 42 lies in the thickness direction of the absorbent body 4 on the non-skin facing side, that is, on the back sheet 3 side, and the non-skin side is covered with chip material. Although 42 is flat, the skin-side encapsulating material 41 is formed in a concave shape at the position where the non-fiber accumulation portion 45 is formed. In this embodiment, the joining portion of the two sheets 41 and 42 is continuous over the substantially entire length of the longitudinal direction X of the non-fiber deposition portion 45. Here, the "substantially full length" means 90% or more of the full length.

As shown in FIGS. 1 to 3, side sheets 51 are respectively arranged on the left and right sides of the front surface sheet 2 side of the absorbent body 5 in the longitudinal direction X. The side sheet 51 has an inner edge portion along the longitudinal direction X, and a lateral edge portion located outside the lateral Y and further along the longitudinal direction X than the inner edge portion. In a plan view as shown in FIG. The inner edge portion of 51 overlaps with the absorbent body 4, and the outer edge portion of the side sheet 51 extends from the side edge of the absorbent body 4 in the longitudinal direction X to the outer side in the lateral direction Y and is joined to the back sheet 3. At the inner edge portion of the side sheet 51, a linear three-dimensional wrinkle-forming elastic member 52 is fixed in an elongated state along the longitudinal direction X, so that when wearing the diaper 1, the contraction of the elastic member 52 is less than 1M below the crotch. Form three-dimensional folds.

As shown in FIG. 1, the absorptive body 5 has a pair of side wing portions 50, 50 which extend from the ventral side portion 1F to the back side portion 1R, and self-absorbent body 4 (absorbent core 40). The edges of the two sides along the longitudinal direction X are extended to the outer side of the transverse direction Y, respectively. As shown in FIGS. 2 and 3, the side flap portion 50 is formed by the edge of the self-absorbent body 4 of each of the front sheet 2, the back sheet 3, and the side sheet 51. The side edges of the longitudinal X are formed to extend beyond the lateral Y, and the sheets 2, 3, and 51 are joined to each other by known joining means such as an adhesive, heat sealing, and ultrasonic sealing. The edge portions 5S, 5S on both sides of the absorbent body 5 in the longitudinal direction X include side flap portions 50.

As shown in FIG. 1 and FIG. 2, a wire-shaped leg fold forming elastic member 53 is disposed in each of the pair of side wing portions 50 and 50 in an extended state so as to extend in the longitudinal direction x through the lower part 1M. The flank portion 50 in the lower part 1M is a part that functions as a so-called leg and is arranged around the wearer's leg when wearing the diaper 1. With the above-mentioned structure, the leg portion is elastic when wearing the diaper 1. The member 53 is contracted to form a pair of leg folds.

As shown in FIG. 1 and FIG. 3, the pair of fixing members 8 and 8 respectively includes the elasticity of the elastic body fixed to the absorbent body 5 so as to extend outward from the side edge portion 5S of the absorbent body 5 to the lateral Y side. The side panel 6 and the hook-and-loop fastener 7 fixed to the side panel 6 so that it may protrude to the outer side of the lateral Y from the front end part 6S of the side panel 6 in the extending direction are formed. The fixing member 8 (side sheet 6, hook-and-loop fastener 7) and the absorbent body 5 are independent members.

As shown in FIG. 1 and FIG. 3, the side sheet 6 includes a plurality of sheet-like materials 61 and 61 having a quadrangular shape in a plan view, and a plurality of sheet-like materials 61 and 61 fixed in an elongated state and extending in the transverse direction Y. The elastic member 62 is formed. The plurality of elastic members 62 are arranged in the central portion of the lateral Y of the side panel 6 with a certain interval in the longitudinal direction X. The position of the elastic member 62 in the side panel 6 (the central part of the transverse Y) is a telescopic section capable of expanding and contracting in the elongation direction of the elastic member 62, that is, the transverse Y. With the above-mentioned telescopic section, the side panel 6 has the transverse Y Scalability. The side edges of the side edges of the side panels 6 which are relatively close to the longitudinal centerline CLx in the side edges of the two sides in the longitudinal direction X are fixed to the side edge portions 5S (side wings of the absorbent body 5 by a known bonding means such as an adhesive). Between the side sheet 51 and the back sheet 3 in the section 50), a fixing part 60 of the side sheet 6 and the absorbent body 5 is formed, and is relatively far away from the longitudinal edge of the longitudinal center line CLx, that is, the front end portion in the extending direction. The 6S side is located further outside the lateral Y than the side edge portion 5S of the absorbent body 5.

As shown in FIGS. 1 and 3, the hook-and-loop fastener 7 includes a tape base 71 and a fixing portion 72. The tape substrate 71 has a rectangular shape in a plan view as shown in FIG. The one end side is fixed to a non-skin-facing surface of the front end portion 6S of the side panel 6 by a known bonding means such as an adhesive to form a fixing portion 70 of the adhesive tape 7 and the side panel 6. A fixing portion 72 is fixed to an inner surface (skin-facing surface) of a portion of the belt substrate 71 extending from the front end 6S of the side sheet 6 in the lateral direction Y. The fixing portion 72 includes a male member of the mechanical surface fastener, and can be detachably fixed to the fixed area 9 of the female member including the mechanical surface fastener described below.

As the sheet-like material 61 constituting the side sheet 6, non-woven fabric, woven fabric, woven fabric, paper, resin obtained by various manufacturing methods such as hot air nonwoven fabric, hot-rolled nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric can be used, for example. Films, etc., and sheets made by integrating two or more of these layers. As the tape base 71 constituting the hook and loop tape 7, for example, a nonwoven fabric or a laminate of a nonwoven fabric and a resin film can be used.

As shown in FIG. 1, a non-skin facing surface of the absorptive body 5 in the ventral portion 1F is formed with a fixed area 9 including a female member of a mechanical surface fastener. The fixed area 9 is fixed to the non-skin facing surface of the back sheet 3 (outside of the non-skin facing surface) forming the non-skin facing surface of the absorbent body 5 by a known bonding means such as an adhesive. Surface), and the fixing portion 72 of the fastening tape 7 including the male member of the mechanical surface fastener can be detachably fixed.

In addition, as shown in FIG. 1, the side edges 5S and 5S of the absorptive body 5 in the abdominal portion 1F along the longitudinal direction X are formed with abdominal wings 55 and 55. The ventral flank 55 includes a non-stretchable sheet, which is the same as the side sheet 6 in that the inside edge portion side is fixed to the side edge portion 5S (side wings of the absorbent body 5 by a known bonding means such as an adhesive). Between the side sheet 51 and the back sheet 3 in the section 50).

As one of the main features of the diaper 1 having the structure described above, the following aspects can be cited: as shown in FIG. 1, the absorbent body 5 is expanded into a flat shape to be expanded, and a pair of side panels 6, In the case where each of them is in a natural state, the imaginary straight line L1 passing through the side panel fixing point A and the hook-and-loop fastener fixing point B is drawn out to each of the pair of fixing members 8 and 8. In this case, the non-fibers are piled up. The longitudinal longitudinal end 45R of the portion 45 is located on the two imaginary straight lines L1, L1 The intersection point C or the vicinity of the intersection point C, and the non-fiber stacking portion 45 extends from the rear longitudinal end 45R toward the ventral longitudinal end 40F of the absorbent core 40 in the longitudinal direction X.

The "near the intersection C" here means that in the unfolded state of the absorbent body 5 (diaper 1) shown in Fig. 1, one side and the other side from the intersection C to the longitudinal direction X are the absorbent bodies The longitudinal X of 5 is within 15% of the total length, and preferably lies within an area within 10%.

The "expanded state of the absorbent body 5" refers to a state where the elastic member (elastic members 52, 53, etc.) included in the absorbent body 5 is extended to expand the absorbent body 5 into a flat shape.

The "natural state of the side sheet 6" refers to a non-elongated state in which no external force is applied to the elastic members (the elastic members 62, etc.) constituting the side sheet 6.

Also, as shown in FIG. 1, the “side sheet fixing point A” refers to the vertical portion of the fixing portion 60 of the side sheet 6 and the absorbent body 5 (the portion joined to the absorbent body 5 via a bonding means such as an adhesive). The innermost part of X and the outermost part of Y in the transverse direction. That is, the side panel fixing point A is a point at the longitudinal end of the fixed lower portion 1M side of the fixed portion 60 at the outermost point in the lateral direction Y. Furthermore, since the fixing portion 60 in the form shown in FIG. 1 is the entire overlapping portion of the side sheet 6 with the absorbent body 5, the fixing point A of the side sheet is located at the side edge of the absorbent body 5 along the longitudinal direction X. On the part 5S, for example, when the fixing part 60 exists on the inner side of the lateral Y than the side edge part 5S, the side sheet fixing point A is located on the inner side of the lateral Y more than the side edge part 5S.

As shown in FIG. 1, the “fixing point B of the hook-and-loop fastener” is the fixing portion 70 of the hook-and-loop fastener 7 and the side panel 6 (the part that is bonded to the side panel 6 via a bonding means such as an adhesive) in the longitudinal direction. The innermost part of X and the outermost part of Y in the transverse direction. That is, the hook-and-loop fastener fixing point B is the point at the longitudinal end at the 1M side of the lower part of the fixed part 70 that is located on the outermost side in the transverse direction Y. Since the fixing portion 70 in the form shown in FIG. 1 is the entire overlapping portion of the hook and loop tape 7 with the side panel 6, the fixing point B of the hook and loop tape is located on the side edge portion of the side panel 6 along the longitudinal direction X. However, for example, when the fixing portion 70 is located on the inner side of the lateral Y than the side edge portion, the fastening point B of the hook and loop fastener is located on the inner side of the lateral Y than the side edge portion.

As a typical wearing operation when a mother wears a diaper 1 to a baby, the following operations can be exemplified: with the baby lying on its back, stick the abdominal portion 1F, the lower part 1M, and the dorsal portion 1R of the diaper 1 to the baby. From this state, the front ends of the pair of hook-and-loop fasteners 7 and 7 are grasped with fingers and stretched toward the ventral portion 1F, so that the fixing portion 72 of each of the hook-and-loop fasteners 7 is fixed to the ventral portion 1F. Area 9. The imaginary straight line L1 connecting the fixing point A of the side panel and the fixing point B of the hook-and-loop fastener during the wearing operation of the diaper 1 is approximately the same as the line of force when the hook-and-loop fastener 7 is stretched. The intersection of the two imaginary straight lines L1 and L1 C becomes a point at which the tensile force acts when the diaper 1 is pulled upward by holding the hook and loop 7. In addition, during the process of stretching and fixing the hook-and-loop fastener 7 to the side of the ventral portion 1F, the diaper 1 bends the imaginary straight line L1 toward the wearer's skin side as a crease, and is located more longitudinally than the crease. The part of the ventral side (anterior side) of X (the lower part of the diaphragm 1M and the lower part of the ventral side 1F) is arranged along the crotch of the wearer.

When the previous unfolded disposable diaper was pulled up by holding the hook and loop fastener during the wearing process, the part corresponding to the intersection C of the diaper 1 was easily caught on the wearer's body, especially the back side of the groin. Therefore, there is a problem that unexpected wrinkles or bends appear in a portion of the previous diaper that is disposed under the wearer's crotch, so that sufficient conformability cannot be obtained, and leakage is likely to occur. Generally speaking, the back-side end of the groin part in a human body is a part where the surface shape changes relatively large in a series of parts around the waist from the back side including the end part, Therefore, the point of intersection C, which is the point of action of the tensile force when stretching the hook and loop fastener, is easy to jam at the end, and because of this kind of jam at the point of intersection C with the body, unexpected diapers are produced. Wrinkled or bent. Moreover, if such wrinkles or bends occur on the skin-opposing surface of the diaper (front sheet side), a gap will be created between the skin-opposing surface and the wearer's skin, so the fit of the diaper will decrease. The excretory fluid of the wearer may leak out along the gap.

In contrast, in the diaper 1 of this embodiment, as shown in FIG. 1, the non-fiber accumulation portion 45 self-intersects with a lower rigidity than the peripheral portion and easily becomes a fold when the diaper 1 is bent. C or its vicinity faces the ventral portion 1F and extends in the longitudinal direction X corresponding to the wearer's front and back directions. Therefore, as described above, during the process of stretching the hook-and-loop fastener 7 toward the ventral portion 1F to fix it As shown in FIGS. 4 and 5, a crease is mainly generated along the two imaginary straight lines L1 and L1 on the back side portion 1R, and is substantially continuous with the two creases (imaginary straight lines L1 and L1). A crease is generated mainly in the lower part of the chin 1M along the non-fiber accumulation portion 45. As a result, in the wearing state of the diaper 1, as shown in FIG. 5, the lower chin 1M was bent toward the non-skin-facing surface side (back sheet 3 side) with the two non-fiber accumulation portions 45 and 45 as folds. The two non-fiber accumulation portions 45 and 45 are applied to the crotch portion and the groin portion of the wearer. In addition, reference numeral 100 in FIGS. 4 and 5 indicates a wearer.

In this way, the diaper 1 is designed in such a manner that "the creases substantially continuous from the back side 1R throughout the lower part 1M of the chin" that can achieve an ideal wearing state with good fit can be achieved by ordinary wearing operations only on the Since the specific portion (on the imaginary straight line L1 and the non-fiber deposition portion 45), unexpected wrinkles or bends are hardly generated in other portions than the specific portion. That is, according to the diaper 1, even if it is not particularly noticed during the wearing operation, the ideal wearing state with less unexpected wrinkles or bends and good conformability can be obtained by only wearing according to a common method, so that a high wearing state can be obtained. Leakproof effect. When the longitudinal end 45R on the back side of the non-fiber accumulation portion 45 is not located at or near the intersection C, and is too far away from the intersection C, unexpected wrinkles or bends may be generated in the wearing state. The leaky aspect cannot obtain satisfactory results.

From the viewpoint of more reliably exerting the action and effect produced by the formation of such a crease, as shown in FIG. 1, the absorbent body 5 is expanded into a flat shape to be expanded, and a pair of side panels is formed. When each of 6 and 6 is in a natural state, the ventral longitudinal end 53F of the leg fold formation elastic member 53 of one of the pair of side wing portions 50 and 50 and the ventral longitudinal direction of the other elastic member 53 are longitudinal. The end 53F is in the same position in the longitudinal direction X. When one imaginary straight line L2 passing through the two ventral longitudinal ends 53F, 53F and extending in the lateral direction is pulled out, the ventral longitudinal direction of the non-fiber accumulation portion 45 is preferred. The end 45F is located on the imaginary straight line L2, or the imaginary straight The portion near the line L2 and closer to the intersection C than the imaginary straight line L2. With the above-mentioned configuration, the non-fiber accumulation portion 45 capable of conforming to the crotch portion of the wearer's crotch portion and the one surrounding the wearer's leg can be applied to the leg folds to complement each other, so it can go further. Improves fit and leak-proof effect. If the ventral longitudinal end 45F of the non-fibrous accumulating part 45 crosses the imaginary straight line L2 and is located near the ventral longitudinal end 5F of the absorbent body 5, the influence of the non-fibrous accumulating part 45 makes it easy to wear the diaper 1 Wrinkles are generated in the ventral portion 1F.

Here, the "part near the imaginary straight line L2 and closer to the intersection C than the imaginary straight line L2" refers to the unfolded state of the absorbent body 5 (diaper 1) shown in FIG. 1 and a pair of side panels 6, 6 In each natural state, the total length from the imaginary straight line L2 to the intersection C side (the lower part of the iliac crest 1M) is within 15% of the total length of the longitudinal X of the absorptive body 5, and preferably within an area within 10%.

In addition, "the ventral longitudinal end 53F of the elastic member 53" means the ventral longitudinal end of the elastic member 53 having a stretchable portion, and does not necessarily coincide with the lengthwise ventral end of the elastic member 53. That is, the "stretchable portion in the elastic member 53" is a portion that is fixed to the side flap portion 50 in an extended state, such as the ventral end portion in the longitudinal direction of the elastic member 53 (that is, the ventral end in the longitudinal direction and its vicinity). ) When it is not fixed to the side wing portion 50, the ventral end portion in the longitudinal direction does not have elasticity, so it is not "the ventral longitudinal end 53F of the elastic member 53".

From the same viewpoint, as shown in FIG. 1, when the absorbent body 5 is flattened into a flat state and each of the pair of side panels 6 and 6 is in a natural state, It is preferable that the back longitudinal end 53R of the leg gather formation elastic member 53 is located near each of the two imaginary straight lines L1 and L1. In this way, the longitudinal ends of the elastic members 53 forming leg folds that can be worn around the legs of the wearer are located on the imaginary straight line L1 that becomes the line of force when the hook and loop fastener 7 is stretched during the wearing operation of the diaper 1 In the vicinity, in particular, the fit of the lower crotch portion 1M to the crotch portion of the wearer can be further improved, and the leak-proof effect can be further improved.

The "near the imaginary straight line L1" here refers to the unfolded state of the absorbent body 5 (diaper 1) as shown in Fig. 1 and the natural state of each of the pair of side panels 6, 6 from the imaginary straight line L1 to One side and the other side of the longitudinal X are each within 15% of the total length of the longitudinal X of the absorptive body 5, and preferably located within a region within 10%.

In addition, the "back-side longitudinal end 53R of the elastic member 53" refers to the back-side longitudinal end of the elastic member 53 in the same manner as the "ventral-side longitudinal end 53F of the elastic member 53".

From the viewpoint of further improving the conformability, the length W (see FIG. 1) in the longitudinal direction from the longitudinal end 5R on the back side of the absorbent body 5 to the intersection C of the two imaginary straight lines L1 and L1 is preferably (see FIG. 1). 30 to 50% of the total length of the longitudinal X of the absorbent body 5 is particularly preferably 35 to 45%.

In addition, the greater the length (ie, the width) of the non-fiber stacking portion 45 in the lateral direction Y, the more flexible the diaper 1 (the lower part 1M) in the non-fiber stacking portion 45 is, and therefore it is easier to form the non-fiber stacking portion 45. Although the width of the non-fiber stacking portion 45 is increased, the absorption performance of the absorbent core 40 is reduced. Taking the above into consideration, from the viewpoint of the flexibility at the non-fiber stacking portion 45, that is, the ease of forming creases and the balance of the absorption performance, the width of the non-fiber stacking portion 45 with respect to the transverse direction Y of the absorbent core 40 The narrowest part of the length (that is, width) is preferably 3% or more, further preferably 5% or more, and more preferably 30% or less, further preferably 25% or less, more specifically, preferably It is 3% or more and 30% or less, and more preferably 5% or more and 25% or less.

In addition, the length of the longitudinal direction X of the non-fiber-stacked portion 45 is preferably 25% or more, more preferably 30% or more, and more preferably 50% or less with respect to the length of the longitudinal X of the absorbent core 40. It is preferably 45% or less, more specifically, 25% or more and 50% or less, and further preferably 30% or more and 45% or less.

In addition, as shown in FIG. 2, in the positions where the two non-fiber stacking portions 45 and 45 are arranged in the absorbent core 40, there are fiber stacking portions 46 on both sides of each non-fiber stacking portion 45 in the transverse direction Y. The fibers The accumulation portion 46 is present in a larger amount than the non-fiber accumulation portion 45 to constitute an absorbent core. 40 core forming material. That is, the absorbent core 40 in the diaper 1 has a pair of fiber stacking portions 46 and 46 located on one of the edge portions on both sides of the absorbent core 40 in the longitudinal direction X, and two non-fiber stacking portions 45, A total of three fiber stacking sections 46 of one fiber stacking section 46 between 45 are preferable in terms of both conformability (flexibility of the non-fiber stacking section 45) and absorption performance. Among the positions where the fiber stacking portions 45 and 45 are arranged, the length (i.e., width) of the transverse Y of the absorbent core 40 is the narrowest. The ratio of the length (i.e., width) of the transverse Y of the three fiber stacking portions 46 is 1 : 1: 1, that is, uniform.

As mentioned above, although this invention was demonstrated, this invention is not limited to the said embodiment, It can change suitably.

For example, in the diaper 1 of the above embodiment, the number of non-fiber accumulation portions is two. However, in the present invention, the number of non-fiber accumulation portions is not particularly limited. For example, the number of non-fiber accumulation portions may be in the center of the absorbent core in the lateral direction. Only one part is formed, and three or more may be formed side by side in the horizontal direction. Considering the absorption performance of the absorptive core, the number of non-fiber stacking portions is preferably 1 to 3, particularly preferably the center of the transverse Y of the absorptive core 40 in the lower part 1M of the diaper 1 like a diaper 1. The fiber stacking section 46 is arranged in the section (the area including the draining section facing section), and two non-fiber stacking sections 45 and 45 are arranged on both sides of the fiber stacking section 46 in the lateral direction Y.

In addition, the absorbent article of the present invention is not limited to the deployment-type disposable diaper according to the embodiment described above, but includes a wide range of articles (deployment type) for absorbing body fluids (urine, menstrual blood, soft stool, sweat, etc.) discharged from the human body. Wearing articles), for example, also includes a diaper cover, a cushion, and the like.

Regarding the embodiment of the present invention described above, the following additional notes will be further disclosed.

<1>

An absorbent article having a longitudinal direction extending from the ventral side of the wearer to the back side through the crotch portion and a transverse direction orthogonal to the crotch portion, and has in the longitudinal direction: a lower crotch portion, which is disposed on the crotch portion when worn; and a ventral portion , Which is placed on the abdomen of the wearer more than the lower part of the palate Side; and a back side portion, which is disposed closer to the wearer's back side than the lower part of the chin; and the absorbent article includes an absorbent body including an absorbent core formed by stacking core forming material fibers, In addition, a pair of fixing members are fixed to the two lateral edge portions of the absorbent body in the longitudinal direction of the absorptive body so as to extend outward from the lateral edge portions to the lateral outer side, and the absorbent in the lower part of the chin is fixed. The non-fiber stacking portion extending in the longitudinal direction is formed in the flexible core, and the pair of fixing members each includes a stretchable member fixed to the absorbent body so as to extend laterally outward from a side edge portion of the absorbent body. The side panel and the hook-and-loop fastener fixed to the side panel so as to extend laterally outward from the front end portion in the extending direction of the side panel are configured to expand the absorbent body into a flat shape and set it to a deployed state, and When the side panel is set to a natural state, a portion of the fixing portion of the side panel and the absorptive body that is located at the innermost side in the longitudinal direction and the outermost side in the lateral direction is set as the side panel fixing point. With Among the fixing parts of the side panels, the innermost part in the longitudinal direction and the outermost part in the lateral direction are set as fastening points for the hook and loop fasteners, and a pair of the fixing members are respectively drawn out through the fastening points for the side panels and the fastening points for the hook and loop fasteners Straight line L1. In this case, the back-side longitudinal end of the non-fiber stacking portion is located at or near the intersection of the two imaginary straight lines L1, and the non-fiber stacking portion faces the absorbent core from the back-side longitudinal end. The ventral longitudinal end extends longitudinally.

<2>

The absorbent article according to the above <1>, wherein the absorbent body has a pair extending from the ventral portion to the dorsal portion and laterally outward from each of the longitudinal side edges of the absorbent core. Flanks, each of a pair of the flanks to pass through the above The elastic members for forming leg folds are arranged in an extended state in a longitudinally extending manner. When the absorbent body is expanded into a flat shape to be unfolded and the side panels are set to a natural state, a pair of the side wings are included. The ventral longitudinal end of the elastic member for forming leg folds and the ventral longitudinal end of the elastic member for forming leg folds of the other are located at the same position in the longitudinal direction. In the case of a lateral longitudinal end and an imaginary straight line L2 extending in the lateral direction, the ventral longitudinal end of the non-fiber accumulation portion is located on or near the virtual straight line L2 and is closer to the intersection than the virtual straight line L2.

<3>

The absorbent article according to the above <2>, wherein the part near the imaginary straight line L2 and closer to the intersection than the imaginary straight line L2 is in the expanded state and in the natural state, from the imaginary straight line L2 to the intersection side is The area within 15% of the longitudinal length of the absorbent body.

<4>

The absorbent article according to any one of the above <1> to <3>, wherein the absorbent body has each one extending from the ventral portion to the dorsal portion and from both sides of the absorbent core in the longitudinal direction. A pair of side wing portions extending outward in the lateral direction, and an elastic member for forming a leg fold is arranged in an extended state in each of the pair of side wing portions so as to extend in the longitudinal direction through the lower part of the chin, and expand the absorbent body into a flat surface. When the shape is set to the unfolded state and the side sheet is set to the natural state, the back longitudinal end of the elastic member for forming a leg fold is located near each of the two imaginary straight lines L1.

<5>

The absorbent article according to the above <4>, wherein the vicinity of the imaginary straight line L1 is above the above In the unfolded state and the above-mentioned natural state, one side and the other side of the longitudinal direction from the imaginary straight line L1 are within 15% of the entire length of the absorbent body in the longitudinal direction.

<6>

The absorptive article according to any one of the above <1> to <5>, wherein the length in the longitudinal direction from the longitudinal end of the absorptive body to the intersection of the two imaginary straight lines L1 is the absorptive body. 30-50% of the total length in the longitudinal direction, preferably 35-45%.

<7>

The absorbent article according to any one of the above <1> to <6>, wherein the longitudinal end of the back side of the non-fiber accumulation portion is located at the intersection of the two imaginary straight lines L1, or from the intersection to one side of the longitudinal direction and the other One side is within 15% of the longitudinal length of the absorbent body.

<8>

The absorbent article according to any one of the above <1> to <7>, wherein the lateral length of the non-fiber stacking portion, ie, the width, relative to the lateral length of the absorbent core, that is, the narrowest portion, is preferred. It is 3% or more, further preferably 5% or more, and more preferably 30% or less, and still more preferably 25% or less.

<9>

The absorbent article according to any one of the above <1> to <8>, wherein the longitudinal length of the non-fiber stacking portion is preferably 25% or more with respect to the longitudinal length of the absorbent core, and more preferably It is preferably 30% or more, and more preferably 50% or less, more preferably 45% or less, more specifically, 25% or more and 50% or less, and further preferably 30% or more and 45% or less.

<10>

The absorbent article according to any one of the items <1> to <9>, in which a pair of the non-fiber stacking portions are present in the absorbent core at a specific interval in the lateral direction, and the pair of non-fibers A total of 3 between the lateral outer sides of the stacking sections and between the pair of non-fiber stacking sections There is a fiber stacking portion. The fiber stacking portion has a core forming material constituting the absorbent core in a larger amount than the non-fiber stacking portion. The pair of non-fiber stacking portions is arranged in the absorbent core. The length of the absorptive core in the transverse direction is the narrowest part, and the ratio of the length in the transverse direction of each of the three fiber stacking portions, that is, the width is 1: 1, that is, they are uniform with each other.

<11>

The absorptive article according to any one of the above <1> to <10>, wherein the non-fiber accumulation portion does not have a through hole of a core forming material constituting the absorbent core at all.

<12>

The absorbent article according to any one of the above <1> to <11>, wherein the non-fiber accumulation portion is located in a longitudinally inner side from the ventral longitudinal end of the absorptive core in the ventral portion, The lower part of the chin is continuous throughout the back side portion in the longitudinal inner side than the back side longitudinal end of the absorbent core.

<13>

The absorbent article according to any one of the above <1> to <12>, wherein the skin-facing surface of the absorbent core system is covered by a skin-side encapsulating core material, and the non-skin-facing surface is covered by a non-skin-side encapsulating core material The covering is performed on the non-fiber stacking portion, and the skin-side encapsulating material is bonded to the non-skin-side encapsulating material.

<14>

The absorbent article according to the above <13>, wherein the absorbent body includes a front sheet and a back sheet, and the absorbent core is disposed between the two sheets, and the skin-side wrapping chip material is adhered by The adhesive is bonded to the front sheet, and the non-skin-side encapsulant is bonded to the back sheet with an adhesive.

<15>

The absorbent article according to any one of the above <1> to <14>, wherein the above-mentioned fixing member It is a separate member from the above-mentioned absorbent body.

<16>

The absorbent article according to any one of the above <1> to <15>, wherein the absorbent core has a single-layer structure.

<17>

The absorbent article according to any one of the above-mentioned <1> to <16>, wherein the fixing point of the side sheet is located on the inner side of the absorbent body in the lateral direction than the longitudinal edge portion of the absorbent body.

<18>

The absorbent article according to any one of the above <1> to <17>, wherein the fixing point of the hook-and-loop fastener is located on the inner side in the lateral direction than the side edge portion in the longitudinal direction of the side sheet.

[Industrial availability]

According to the present invention, there is provided an absorbent article that can be applied to a crotch portion of a wearer of the wearer only by wearing it in accordance with a common method, even if it is not particularly noticed during a wearing operation, and can exhibit a high leak-proof effect.

Claims (3)

An absorbent article having a longitudinal direction extending from the ventral side of the wearer to the back side through the crotch portion and a transverse direction orthogonal to the crotch portion, and has in the longitudinal direction: a lower crotch portion, which is disposed on the crotch portion when worn; and a ventral portion It is arranged on the ventral side of the wearer more than the lower part of the chin; and the back part is arranged on the back side of the wearer more than the lower part of the chin; and the absorbent article includes a fiber containing a core-forming material piled up The absorptive body composed of the formed absorptive core body is fixed on the back side portion of the absorptive body at both side edges in the longitudinal direction so as to extend outward from the side edge portions to the lateral outer side. There is a pair of fixing members; and the absorbent core in the lower part of the chin is formed with a non-fiber stacking portion extending in the longitudinal direction. The pair of fixing members each includes a lateral direction from a side edge portion of the absorbent body. The outer side is fixed to the stretchable side panel of the absorbent body, and the hook-and-loop fastener is fixed to the side panel so as to extend laterally outward from the front end of the side panel in the extending direction. Suck the above When the body is expanded into a flat state and the side panel is set to the unfolded state, and the side panel and the absorbent body are fixed to the innermost part in the longitudinal direction and the outermost part in the lateral direction, As the fixing points of the side panels, the longitudinally innermost and laterally outermost portions of the fixing portions of the above-mentioned hook-and-loop fasteners and the side-outside are set as the hook-and-loop fastener fixing points, and a pair of the fixing members are pulled out and passed through. In the case of the imaginary straight line L1 of the side panel fixing point and the hook and loop fastener fixing point, the back longitudinal end of the non-fiber stacking portion is located at or near the intersection of the two imaginary straight lines L1, and the non-fiber stacking portion The longitudinal longitudinal end of the absorptive core extends from the back longitudinal end to the absorptive core, and the absorptive body has two longitudinally extending from the ventral side to the back side and from the absorptive core. Each pair of side edges extends a pair of side flaps to the lateral outer side, and an elastic structure for forming leg folds is arranged in a stretched state in each of the pair of side flaps so as to extend longitudinally through the lower part of the chin. In the case where the absorbent body is expanded into a flat shape to be unfolded, and the side panel is set to a natural state, a ventral longitudinal end of the elastic member of one of the pair of side wings and another The ventral longitudinal ends of one of the above-mentioned elastic members are in the same position in the longitudinal direction, and when an imaginary straight line L2 passing through the longitudinal ends of the two ventral sides and extending in the lateral direction is pulled out, The longitudinal longitudinal end is located on the imaginary straight line L2 or near the imaginary straight line L2 and is closer to the intersection than the imaginary straight line L2; the vicinity of the intersection is in the above-mentioned expanded state, from the intersection to one side of the longitudinal direction and the other The sides are the areas within 15% of the longitudinal length of the absorptive body. The part near the imaginary straight line L2 and closer to the intersection than the imaginary straight line L2 is in the unfolded state and the natural state. The line L2 toward the intersection is an area within 15% of the total length of the absorbent body in the longitudinal direction. For example, in the absorbent article according to claim 1, in a case where the absorbent body is expanded into a flat shape to be unfolded and the side panel is set to a natural state, the longitudinal side of the back side of the elastic member for forming leg folds is formed. Located near each of the two imaginary straight lines L1. If the absorbent article according to claim 1 or 2, the length in the longitudinal direction from the longitudinal end of the absorptive body to the intersection of the two imaginary straight lines L1 is 30 to 50% of the longitudinal total length of the absorptive body. .