TW201711657A - Absorbent article - Google Patents

Abstract

A pair of fastening members (8) are fixed to an absorbent main body (5) on the dorsal side portion (1R), and a non-fiber stacked portion (45) is formed extending in the longitudinal direction X in an absorbent core (40) in a crotch portion (1M). The fastening members (8) include an elastic side panel (6) fixed to the side edge portion (5S) of the absorbent main body (5) and a fastening tape (7). When a virtual straight line (L1) passing through a side panel fixing point (A) and a fastening tape fixing point (B) is drawn to each of the pair of fastening members (8) in the unfolded state of the absorbent main body (5) and the natural state of the side panels (6), the dorsal side longitudinal end (45R) of the non-fiber stacked portion (45) is positioned at or near the intersection (C) of the two virtual straight lines (L1), and the non-fiber stacked portion (45) extends in the longitudinal direction (X) from the dorsal side longitudinal end (45R) toward the ventral side longitudinal end (40F) of the absorbent core (40).

Description

Absorbent article

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

Typical examples of the absorbent article include a ventral side portion disposed on the ventral side of the wearer, a back side portion disposed on the back side, and a crotch portion located between the diaper side, and having a liquid permeation. The front sheet, the liquid impervious back sheet and the absorbent core disposed between the two sheets. Further, as a disposable diaper which is an absorbent article, there is known an unfolded disposable diaper in which both side edges of the back side portion of the absorbent body including the absorbent core are from the side edge portion The stretchable side panels which are stretched in the lateral direction are attached so as to extend laterally outward, and the fixing adhesive tape used for wearing the diaper is attached to the front end portion of each side panel in the extending direction. The unfolded disposable diaper of the above configuration can be worn by elongating the adhesive tape of the back side portion to the ventral side of the wearer and fixing the fixing portion of the belt to the outer surface of the ventral side portion.

Further, in the absorbent article, previously, a groove portion having a smaller basis weight than the peripheral portion or a through hole penetrating the absorbent core in the thickness direction is formed in one portion of the absorbent core for various purposes. For example, in Patent Document 1, it is described that in order to allow the absorbent core to be easily bent in the lateral direction, the absorbent core in the unfolded disposable diaper is formed symmetrically with respect to the center line of the transverse direction as two curved portions. A groove portion of the mechanism that extends in the longitudinal direction. Further, in Patent Document 2, in order to improve the diffusibility and the conformability of the excretion liquid, the absorbent core in the unfolded disposable diaper is formed with a plurality of grooves extending in the longitudinal direction.

Prior technical literature Technical literature

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

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

The present invention relates to an absorbent article having a longitudinal direction extending from the ventral side of the wearer to the back side via the crotch portion and a transverse direction orthogonal thereto, and having a lower portion in the longitudinal direction, which is disposed in the crotch portion when worn. a ventral side portion disposed on the ventral side of the wearer than the crotch portion; and a back side portion disposed on the back side of the wearer than the crotch portion; and having a fiber stack containing the core forming material An absorbent body formed of the absorbent core is fixed to the lateral edges of the absorbent body in the longitudinal direction from the side edges of the absorbent body in the longitudinal direction For fixing components. The above absorbent core in the above-mentioned crotch portion is formed with a non-fiber accumulation portion extending in the longitudinal direction. Each of the pair of fixing members includes a side panel that is 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 from the side panel The portion is extended to the laterally outward direction and is fixed to the fastening tape of the side panel. When the absorbent body is expanded into a flat shape and is in an unfolded state, and the side sheet is in a natural state, the side portion of the side panel and the fixed portion of the absorbent body are located at the innermost longitudinal direction and the lateral direction. The outer portion is a side panel fixing point, and a portion of the fixing portion of the fastening tape and the fixing portion of the side panel that is located at the innermost longitudinal direction and the outermost lateral direction is a fixing point of the fastening tape, and the pair of fixing members are Each of the imaginary straight lines L1 passing through the side panel fixing point and the fastening tape fixing point is pulled out. In this case, the back side longitudinal end of the non-fiber stacking portion is located at the intersection of the two imaginary straight lines L1 or the intersection point. Nearby, and the non-fibrous stack extends longitudinally from the dorsal longitudinal end toward the ventral longitudinal end of the absorbent core.

1‧‧‧ diapers

1F‧‧‧ ventral side

1M‧‧‧胯 lower part

1R‧‧‧ Back side

2‧‧‧Front sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Absorbing ontology

5F‧‧‧ Ventral longitudinal end

5R‧‧‧back side longitudinal end

5S‧‧‧lateral edge

6‧‧‧ side film

6S‧‧‧ front end

7‧‧‧Buckle belt

8‧‧‧Fixed components

9‧‧‧Fixed area

40‧‧‧Absorbable core

40F‧‧‧ Ventral longitudinal end

40R‧‧‧back side longitudinal end

41‧‧‧ Skin side pack core material

42‧‧‧Non-skin side pack chip

45‧‧‧Non-fiber accumulation

45F‧‧‧ Ventral longitudinal end

45R‧‧‧back side longitudinal end

46‧‧‧Fiber accumulation

50‧‧‧Flanking

51‧‧‧Side sheet

52‧‧‧Elastic members for forming three-dimensional pleats

53‧‧‧Elastic members for the formation of leg folds

53F‧‧‧ Ventral longitudinal end

53R‧‧‧back side longitudinal end

55‧‧‧ Ventral flap

60‧‧‧Fixed Department

61‧‧‧Sheet materials

62‧‧‧Flexible components

70‧‧‧Fixed Department

71‧‧‧With substrate

72‧‧‧ Fixed Department

100‧‧‧wearers

A‧‧‧Side sheet fixation point

B‧‧‧Buckle belt fixing point

C‧‧‧ intersection

CLx‧‧‧ vertical centerline

L1‧‧‧ imaginary straight line

L2‧‧‧ imaginary straight line

X‧‧‧ portrait

Y‧‧‧ horizontal

W‧‧‧ length

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

Fig. 2 is a schematic cross-sectional view showing the line I-I of Fig. 1 (the portion where the non-fiber accumulation portion is disposed).

Fig. 3 is a schematic cross-sectional view showing a line II-II of Fig. 1 (a configuration portion of a fixing member).

Fig. 4 is a schematic rear view showing the state in which the diaper is worn from the back side of the wearer of the diaper shown in Fig. 1.

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

The unfolding type absorbent article can exert its original performance by fixing the adhesive tape in an appropriate position or the like and adopting an appropriate wearing state. In the unfolded absorbent article described in Patent Documents 1 and 2, a non-fiber-forming portion of a substantially non-fiber-filled core-forming material such as a groove portion or a through-hole is formed in the absorbent core, and the non-fiber-forming portion is formed at a position The relationship between the adhesive tapes is not appropriate, and therefore, in the fixing operation of the adhesive tape, it is easy to form an unexpected wrinkle or bend of the front surface of the skin of the diaper, such as the face sheet, and the conformity There is still room for improvement. In the wearing state of the diaper, if there is unexpected wrinkles or bends on the front sheet, a gap is formed between the front sheet and the wearer's skin, and urine or the like excrement leaks to the outside along the gap. After that.

Accordingly, the present invention relates to the provision of an absorbent article which, even when worn in a conventional manner, can be applied to the crotch portion of the wearer in accordance with a conventional method, thereby exerting a high leakage preventing effect. .

Hereinafter, the absorbent article of the present invention will be described with reference to the drawings based on a disposable diaper as 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 via the crotch portion and a transverse direction Y orthogonal thereto, and has a lower portion 1M in the longitudinal direction X, which is disposed in the crotch portion when worn. The ventral side portion 1F is disposed on the ventral side of the wearer's lower portion 1M, and the back side portion 1R is disposed on the back side of the wearer's lower portion 1M. The crotch portion 1M includes an excretory portion opposing portion (not shown) that is disposed opposite to the excretory portion of the wearer such as the penis. The opposing portion of the excretory portion is usually located slightly in the center of the longitudinal direction X of the diaper 1 at a position facing the front side portion 1F. The front side portion 1F, the crotch portion 1M, and the back side portion 1R correspond to respective regions when the diaper 1 (absorbent body 5) is divided into three equal portions in the longitudinal direction X.

The diaper 1 is a so-called unfolded type disposable disposable diaper, and includes an absorbent main body 5 having a liquid-permeable front sheet 2, a liquid-impermeable or water-repellent back sheet 3, and two sheets. The liquid retaining body 4 disposed between the materials 2 and 3; and the pair of fixing members 8 and 8, which are fixed to the side edges 5S of the absorbent body 5 in the longitudinal side X of the absorbent body 5 in the back side portion 1R , 5S. The diaper 1 is formed symmetrically in the lateral direction Y by dividing the (absorbent body 5) into two parts and the longitudinal center line CLx extending in the longitudinal direction X as a reference. The absorbent body 5 has a rectangular shape which is long in the longitudinal direction X in plan view as shown in FIG. The pair of fixing members 8 and 8 are fixed to the absorbent body 5 so as to extend from the both side edges 5S and 5S of the absorbent body 5 in the back side portion 1R to the outside of the lateral direction Y.

The front sheet 2 and the back sheet 3 each have a size larger than that of the absorber 4, and extend outward from the periphery of the absorber 4, and the extension portions thereof are sealed by an adhesive, a heat seal, an ultrasonic seal, or the like. The bonding means are known to be joined to each other. As the front sheet 2 and the back sheet 3, various conventionally used for such an absorbent article can be used without any particular limitation. For example, as the front sheet 2, various nonwoven fabrics or apertured films can be used, and as the back sheet 3, a resin film or a laminate of a resin film and a nonwoven fabric or the like can be used. The back sheet 3 is, for example, in the form of a film sheet having liquid impermeability, and a form in which an exterior sheet is placed on the outer surface side of the non-skin facing surface of the film sheet. Material is for example Weaving.

The absorbent body 4 includes a liquid-retaining absorbent core 40, a skin-side wrapping core material 41 covering the skin facing surface of the absorbent core 40, and a non-skin opposing surface covering the absorbent core 40. The non-skin side is composed of a core material 42. The absorbent core 40 has an hourglass shape in which the central portion of the longitudinal direction X is inwardly contracted in a plan view as shown in FIG. 1, and has a shape elongated in the longitudinal direction X. The absorbent core 40 has a ventral longitudinal end 40F at the ventral side 1F and a dorsal longitudinal end 40R at the dorsal portion 1R and a full length X of the iliac crest 1M. As shown in FIG. 2 and FIG. 3, the skin side wrapping core material 41 has substantially the same size as the skin facing surface of the absorbent core 40, whereas the length of the lateral direction Y of the non-skin side wrapping core material 42 (ie, The width is greater than the non-skin contrast surface of the absorbent core 40. The wide non-skin side pack core material 42 covers the entire non-skin facing surface of the absorbent core 40, and the self-absorbent core 40 extends along the side edges of the longitudinal direction X toward the outer side of the lateral direction Y. The extension portion is wound up on the skin side wrapping core material 41 that faces the skin opposite to the skin of the absorbent core 40, and covers both side edges of the skin side wrapping core material 41 in the longitudinal direction X.

Further, in the present specification, the "skin facing surface" is an absorbent article or a constituent member thereof (for example, the absorbent main body 5) which faces the skin side of the wearer when wearing the absorbent article, that is, relatively close to the wearer. On the side of the skin of the person, the "non-skin facing surface" is an absorbent article or a component thereof that faces the side opposite to the skin side when the absorbent article is worn, that is, the side that is relatively away from the side of the wearer's skin. Further, in the present specification, "when worn" refers to a state in which the usual wearing position, that is, the correct wearing position of the absorbent article is maintained, and the absorbent article is not in a state of being displaced from the wearing position. .

The absorbent core 40 is formed by stacking fibers of a core forming material containing an absorbent material and having a single layer structure. As the absorbent material, those which are generally used as a material for forming such an absorbent core can be used without particular limitation, and examples thereof include hydrophilic fibers such as wood pulp and synthetic fibers treated with a hydrophilizing agent, or water-absorbent polymerization. Particles. That is, the absorbent core 40 may be a fibrous deposit of hydrophilic fibers or may carry water-absorbent polymer particles on the fibers. The accumulation body is the one. As the clad core materials 41 and 42, for example, paper, non-woven fabric, or the like can be used.

As shown in FIGS. 1 and 2, the absorbent core 40 in the lower portion 1M 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, one of the non-fiber-recombining portions 45, 45 extending in the longitudinal direction X is formed to divide the diaper 1 into two portions in the lateral direction Y and to extend in the longitudinal direction X. The center line CLx is formed symmetrically with respect to the reference. Each of the non-fiber accumulation portions 45 has a rectangular shape in plan view, and its longitudinal direction coincides in the longitudinal direction X. In the skin facing surface of the absorbent core 40, the length (i.e., the width) of the lateral direction Y of each of the non-fiber stacking portions 45 is fixed over the entire length of the longitudinal direction (longitudinal direction X), and is not in the absorbent core 40. The width of each non-fiber accumulation portion 45 of the skin facing surface is also fixed over the entire length of the longitudinal direction.

As shown in Fig. 2, the non-fiber accumulation portion 45 in the diaper 1 has no through-holes (i.e., the basis weight is zero) constituting the core forming material of the absorbent core. However, in the non-fiber-receiving portion of the present invention, in addition to the form of the through-holes of the non-fiber-receiving portion 45, a smaller amount (specifically, about 20 g/m2) of other regions having a plurality of absorbent cores is also included. The shape of the core forming material. This is because the non-fiber deposition portion including a small amount of the fiber accumulation portion also exhibits the same operational effects (liquid diffusion action or the like) as the non-fiber accumulation portion including the through hole. In consideration of the liquid diffusion effect or the like, the non-fiber deposition portion including the through holes is preferable to the non-fiber deposition portion including a small amount of the fiber accumulation portion.

As shown in Fig. 1, the non-fiber accumulation portion 45 is located further from the ventral longitudinal end 40F of the absorbent core 40 in the ventral side portion 1F to the inner side of the longitudinal direction X, via the lower portion 1M, over the back side portion 1R. The back side longitudinal end 40R of the absorbent core 40 is continuous with the inner side of the longitudinal direction X. That is, the non-fiber accumulation portion 45 has a ventral longitudinal end 45F at the ventral side portion 1F which is located further inside the longitudinal direction X than the ventral longitudinal end 40F of the absorbent core 40, at both longitudinal ends 45F Between 40F, a larger amount of the core forming material constituting the absorbent core 40 is present than the non-fiber accumulation portion 45. Further, the non-fiber accumulation portion 45 has a back side longitudinal end 45R at the back side portion 1R, which is located on the inner side of the longitudinal direction X of the back side longitudinal end 40R of the absorbent core 40, at both longitudinal ends 45R Between 40R and non-fiber The stacking portion 45 has a larger amount of the core forming material constituting the absorbent core 40.

The non-fiber accumulation portion 45 (non-fiber accumulation portion including the through-holes) is formed in the fiber deposition step of the core-forming material such as wood pulp when the absorbent core 40 is manufactured, and intentionally hinders the fiber formation of the core formation material. The part. The absorbent core 40 having the non-fiber accumulation portion 45 can be produced in accordance with a previously known method for producing an absorbent core, for example, by drawing a core forming material supplied from an air stream to be formed in a drum. In the method of obtaining the absorbent core 40 on the molding die of the outer peripheral surface, the molding die using the specific pattern, for example, the portion corresponding to the non-fiber accumulation portion 45 protrudes upward from the peripheral portion. A molding die is produced as the molding die. In the absorbent core 40 obtained by the above method, the portion where the core forming material is not present is the non-fiber accumulation portion 45. Further, as another manufacturing method of the absorbent core 40 having the non-fiber-receiving portion 45, it is also possible to employ a method of producing an absorbent core having no non-fiber-forming portion, and the specificity of the absorbent core. The part is subjected to post-processing such as punching or cutting to form a non-fiber accumulation portion. The absorbent core having the "non-fiber-packed portion including a small amount of fiber deposition portion" described above can also be produced by the above method.

As shown in FIG. 2, in the non-fiber accumulation portion 45, the skin side wrapping core material 41 is joined to the non-skin side wrapping core material 42. According to the above configuration, the adhesion between the absorbent core 40 and the two sheets 41 and 42 is improved, so that the shape retention property of the absorbent core 40 disposed between the two sheets 41 and 42 is improved, even if it constitutes absorption. The absorbent material such as the water-absorbent polymer particles contained in the core forming material of the core body 40 is swollen by absorbing urine or the like, and the degree of deformation of the absorbent core 40 is also suppressed. Moreover, the skin side pack core material 41 is bonded to the front sheet 2 by an adhesive, and the non-skin side pack core material 42 is joined to the back sheet 3 by an adhesive, and is constrained by the above configuration. Since the absorbent body 4 is moved, it is 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 the excellent absorption performance can be stably exhibited. Moreover, with the above configuration, the absorbent core 40 is aligned The detachment of the liquid bleed is improved, and the burying of the non-fiber accumulation portion 45 due to swelling of the absorbing material contained in the core forming material is effectively prevented.

The joint portion of the two sheets 41, 42 in the non-fiber accumulation portion 45 can be formed, for example, in the following manner. In other words, an adhesive such as a hot-melt adhesive is applied to a corresponding position of the non-fiber deposition portion 45 of at least one of the two sheets 41 and 42 in advance, and the absorbent core 40 is covered with the two sheets 41 and 42. After the absorber 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, 42 can be joined to the non-fiber stacking portion 45. When the sheets 41 and 42 are pressed, it is also possible to use a known embossing process such as embossing with or without heat embossing or ultrasonic embossing. In the diaper 1, as shown in Fig. 2, the joint portion of the two sheets 41, 42 is biased against the non-skin facing side, that is, the back sheet 3 side in the thickness direction of the absorbent body 4, and the non-skin side pack core material Although 42 is flat, the skin side wrapping core material 41 is concavely recessed at the position where the non-fiber accumulation portion 45 is formed. Further, in the present embodiment, the joint portion of the two sheets 41 and 42 is continuous over substantially the entire length of the longitudinal direction X of the non-fiber accumulation portion 45. Here, "substantially full length" means 90% or more of the total length.

As shown in FIGS. 1 to 3, the side sheets 51 are disposed on the left and right sides of the longitudinal direction X on the side of the front sheet 2 of the absorbent body 5. The side sheet 51 has an inner edge portion in the longitudinal direction X and a side edge portion which is located on the outer side of the lateral direction Y and which is located outside the longitudinal direction X, in a plan view as shown in FIG. The inner edge portion of the 51 overlaps with the absorber 4, and the outer edge portion of the side sheet 51 extends from the side edge of the absorber 4 in the longitudinal direction X toward the outer side of the lateral direction Y, and is joined to the back sheet 3. The linear pleat-formed elastic member 52 is fixed to the inner edge portion of the side sheet 51 in the longitudinal direction X in an extended state, whereby the diaper 1 is worn at least by the contraction of the elastic member 52 at least 1M. Form a three-dimensional fold.

As shown in Fig. 1, the absorbent body 5 has a pair of side flap portions 50, 50 which extend from the front side portion 1F to the back side portion 1R and from the absorbent body 4 (absorbent core 40). The side edges along the longitudinal direction X are respectively extended toward the outer side of the lateral direction Y. 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 direction X are formed to extend toward the outer side of the lateral direction Y, and the respective sheets 2, 3, and 51 are joined to each other by a known joining means such as an adhesive, heat sealing, or ultrasonic sealing. The side edges 5S, 5S of the absorbent body 5 in the longitudinal direction X include the side flaps 50.

As shown in FIG. 1 and FIG. 2, each of the pair of side flap portions 50 and 50 is provided with a linear leg-pleat-forming elastic member 53 in an extended state so as to extend in the longitudinal direction through the crotch portion 1M. The side flap portion 50 in the crotch portion 1M is a portion that functions as a so-called leg portion disposed around the leg of the wearer when the diaper 1 is worn. With the above configuration, the diaper 1 is elasticized when the diaper 1 is worn. The member 53 is contracted to form a pair of leg pleats.

As shown in FIGS. 1 and 3, each of the pair of fixing members 8 and 8 includes a stretchable member that is fixed to the absorbent body 5 so as to extend outward from the side edge portion 5S of the absorbent body 5 toward the outside of the lateral direction Y. The side panel 6 and the fastening tape 7 which is fixed to the side panel 6 so that the front end portion 6S extends outward from the lateral direction Y in the extending direction of the side panel 6 is formed. The fixing member 8 (the side panel 6, the fastening tape 7) and the absorbent body 5 are independent members.

As shown in FIGS. 1 and 3, the side panel 6 includes two sheet-like materials 61 and 61 having a quadrangular shape in plan view, and a plurality of sheet-like materials 61 and 61 which are fixed in an extended state between the two sheet-like materials 61 and 61 and extend in the lateral direction Y. The strip elastic member 62 is constructed. The plurality of elastic members 62 are disposed at a central portion of the lateral direction Y of the side sheets 6 with a certain interval in the longitudinal direction X. The arrangement portion of the elastic member 62 in the side panel 6 (the central portion of the lateral direction Y) is an elastically stretchable portion that can expand and contract in the direction of elongation of the elastic member 62, that is, in the lateral direction Y, and the side panel 6 has the lateral direction Y in the lateral direction Y by the above-described expansion and contraction portion. Scalability. The side edges of the side sheets 6 which are relatively close to the longitudinal center line CLx of the both side edges of the longitudinal direction X are fixed to the side edge portion 5S of the absorbent body 5 by a known joining means such as an adhesive. Between the side sheet 51 and the back sheet 3 in the portion 50), the fixing portion 60 of the side sheet 6 and the absorbent body 5 is formed, and the front end portion in the extending direction is opposite to the side edge portion away from the longitudinal center line CLx. The 6S side is located on the outer side of the lateral direction Y of the side edge portion 5S of the absorbent body 5.

As shown in FIGS. 1 and 3, the fastening tape 7 is composed of a tape substrate 71 and a fixing portion 72. The tape substrate 71 has a rectangular shape in plan view as shown in FIG. 1 and its longitudinal direction (lateral Y). The one end side is fixed to the non-skin opposing surface of the end portion 6S before the side panel 6 by a known joining means such as an adhesive, and the fixing portion 70 of the fastening tape 7 and the side panel 6 is formed. The fixing portion 72 is fixed to the inner surface (the skin facing surface) of the portion of the base material 71 from the side sheet 6 before the side portion 6S extends in the lateral direction Y. The fixing portion 72 includes a male member of a mechanical surface fastener, and can be detachably fixed to the fixed region 9 of the female member including the mechanical surface fastener described below.

As the sheet-like material 61 constituting the side sheet 6, for example, non-woven fabric, woven fabric, woven fabric, paper, resin obtained by various methods such as hot air non-woven fabric, hot-rolled non-woven fabric, spunlace nonwoven fabric, spunbonded nonwoven fabric, and melt-blown nonwoven fabric can be used. A film or the like, and a sheet obtained by integrating these two or more layers. Further, as the tape base material 71 constituting the fastening tape 7, for example, a non-woven fabric or a laminate of a non-woven fabric and a resin film can be used.

As shown in Fig. 1, a non-skin opposing surface of the absorbent body 5 in the front side portion 1F is formed with a fixed region 9 of a female member including a mechanical surface fastener. In the fixed region 9 , the female member of the mechanical face fastening member is fixed to the non-skin opposing surface of the back sheet 3 forming the non-skin opposing surface of the absorbent body 5 by a known joining means such as an adhesive. The surface is formed so that the fixing portion 72 of the fastening tape 7 including the male member of the mechanical surface fastener can be detachably fixed.

Further, as shown in Fig. 1, the ventral wings 55, 55 are formed on both side edges 5S, 5S of the absorbent body 5 in the longitudinal direction X in the abdominal portion 1F. The ventral wing 55 includes a non-stretchable sheet, and the sheet is fixed to the side edge portion 5S of the absorbent body 5 by a known joining means such as an adhesive, similarly to the side panel 6. Between the side sheet 51 and the back sheet 3 in the portion 50).

One of the main features of the diaper 1 having the above-described configuration is as follows: as shown in Fig. 1, the absorbent body 5 is expanded into a planar shape to be in an unfolded state, and a pair of side sheets 6, (6) When each of the pair of fixing members 8 and 8 is pulled out, the imaginary straight line L1 passing through the side panel fixing point A and the fastening tape fixing point B is pulled out, and in this case, non-fiber accumulation The back side longitudinal end 45R of the portion 45 is located on the two imaginary straight lines L1, L1 The intersection C or the vicinity of the intersection C, and the non-fiber accumulation portion 45 extends from the back longitudinal end 45R toward the ventral longitudinal end 40F of the absorbent core 40 in the longitudinal direction X.

Here, "the vicinity of the intersection point C" means an absorbent body in the unfolded state of the absorbent body 5 (diaper 1) as shown in Fig. 1, from the intersection point C to the one side of the longitudinal direction X and the other side. 5 is less than 15% of the total length of the longitudinal direction X, preferably within 10%.

In addition, the "expanded state of the absorbent body 5" is a state in which the elastic members (elastic members 52, 53 and the like) provided in the absorbent body 5 are extended to expand the absorbent body 5 into a planar shape.

Moreover, the "natural state of the side panel 6" means a non-elongated state in which no external force is applied to the elastic member (the elastic member 62 or the like) constituting the side panel 6 at all.

Further, as shown in Fig. 1, the "side sheet fixing point A" is in the longitudinal direction of the side portion 6 and the fixing portion 60 of the absorbent body 5 (the portion joined to the absorbent body 5 via a bonding means such as an adhesive) The innermost portion of X and the outermost portion of the lateral direction Y. That is, the side panel fixing point A is a point at the longitudinal end of the lower portion 1M side of the fixing portion 60 at the outermost side of the lateral direction Y. Furthermore, since the fixing portion 60 in the form shown in FIG. 1 is integral with the overlapping portion of the absorbent body 5 in the side panel 6, the side panel fixing point A is located on the side edge of the absorbent body 5 along the longitudinal direction X. In the portion 5S, for example, when the fixing portion 60 exists in the side of the lateral side Y of the side edge portion 5S, the side panel fixing point A is located further inside the lateral direction Y than the side edge portion 5S.

Further, as shown in Fig. 1, the "adhesive tape fixing point B" is a longitudinal direction of the fastening portion 70 of the fastening tape 7 and the fixing portion 70 of the side panel 6 (the portion joined to the side panel 6 via a bonding means such as an adhesive) The innermost portion of X and the outermost portion of the lateral direction Y. That is, the fastening tape B is fixed at the point where the longitudinal end of the lower portion 1M side of the fixing portion 70 is located at the outermost side of the lateral direction Y. Since the fixing portion 70 in the form shown in FIG. 1 is integral with the overlapping portion of the side panel 6 in the fastening tape 7, the fastening tape fixing point B 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 present on the inner side of the lateral direction Y from the side edge portion, the fastening tape fixing point B is located further inside the lateral direction Y than the side edge portion.

As a typical wearing operation when the mother wears the diaper 1 to the baby, the following operation is performed: the ventral side 1F, the lower part 1M, and the back side 1R of the diaper 1 are attached to the baby in a state where the baby is lying on his back. From this state, the front end portions of the pair of fastening tapes 7, 7 are pulled by fingers to the front side portion 1F side, and the fixing portions 72 of the respective fastening tapes 7 are fixed to the abdominal portion 1F. Area 9. The imaginary straight line L1 connecting the side panel fixing point A and the fastening tape fixing point B in the diaper 1 wearing operation substantially coincides with the force line when the fastening tape 7 is stretched, and the intersection of the two imaginary straight lines L1 and L1 C becomes a point at which the gripping force of the fastening tape 7 to pull the diaper 1 upward is exerted. Further, in the process of stretching and fixing the fastening tape 7 to the side of the front side portion 1F, the diaper 1 bends the imaginary straight line L1 as a crease to the skin side of the wearer, and is located further in the longitudinal direction than the crease. The part of the ventral side (front side) of X (the lower part 1M and the ventral part 1F) is arranged along the armpit of the wearer.

When the prior unfolded disposable diaper grips the previous diaper during the wearing process, the portion of the diaper 1 corresponding to the intersection C is easily caught on the wearer's body, especially on the back side of the groin In the end portion, there is a problem that unexpected wrinkles or bends occur in the portion of the previous diaper that is placed under the arm of the wearer, and sufficient conformability cannot be obtained, and leakage is likely to occur. In general, the end portion of the back side of the inguinal region in the human body is a portion in which the surface shape of the portion of the inferior side of the inferior side of the waist including the end portion is relatively large. Therefore, the intersection point C of the action point of the tensile force when the adhesive tape is stretched is easily caught at the end portion, and the diaper is unexpectedly caused by the jamming of the body at the intersection point C. Wrinkled or bent. Further, if such wrinkles or bends occur on the skin facing surface (front sheet side) of the diaper, a gap is formed between the skin facing surface and the wearer's skin, and the diaper conformability is lowered. And there is a leakage of the wearer's excretion fluid to the outside along the gap.

On the other hand, in the diaper 1 of the present embodiment, as shown in FIG. 1, the non-fiber accumulation portion 45 which is lower in rigidity than the peripheral portion and which is likely to be a crease when the diaper 1 is bent is self-intersection point. C or its vicinity toward the front side portion 1F extends in the longitudinal direction X corresponding to the front and rear direction of the wearer, and therefore, as described above, the fastening tape 7 is stretched to the side of the front side portion 1F to be fixed. As shown in FIG. 4 and FIG. 5, the crease is generated along the two imaginary straight lines L1 and L1 mainly on the back side portion 1R, and is substantially continuous with the two creases (imaginary straight lines L1, L1). A crease is produced along the non-fiber accumulation portion 45 mainly at the crotch portion 1M. As a result, in the wearing state of the diaper 1, the lower part 1M is bent toward the non-skin opposing side (the back sheet 3 side) by using the two non-fiber stacking portions 45 and 45 as creases as shown in Fig. 5 . The two non-fibrous stacking portions 45, 45 are affixed to the groin portion of the crotch portion of the wearer's crotch. Further, reference numeral 100 in FIGS. 4 and 5 denotes a wearer.

In this way, the diaper 1 is designed such that the crease which is substantially continuous from the back side 1R to the crotch portion 1M can be formed only in the ideal wearing state in which the wearing condition is good by the normal wearing operation. Since the specific portion (the imaginary straight line L1 and the non-fiber accumulation portion 45) is less likely to be wrinkled or bent 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, it is possible to obtain an ideal wearing state in which unexpected wrinkles or less bending and good conformability are obtained by wearing only the usual method, and thus it is possible to obtain a higher wearing state. Leakproof effect. When the back side longitudinal end 45R of the non-fiber accumulation portion 45 is not located at or near the intersection point C and is too far away from the intersection point C, unexpected wrinkles or bends are generated in the worn state, and therefore, the conformity and the prevention are applied. The leaky aspect cannot achieve satisfactory results.

From the viewpoint of the effect of the formation of such a crease, the absorbent body 5 is expanded into a flat shape and is in an unfolded state, and a pair of side sheets are formed as shown in FIG. 1 . In the case where each of the pair of side flap portions 50, 50 is one of the pair of side flap portions 50, 50, the ventral longitudinal end 53F of the elastic member 53 for forming the leg gathers and the ventral side of the elastic member 53 of the other member The end 53F is at the same position in the longitudinal direction X, and in the case of pulling out an imaginary straight line L2 extending through the two ventral longitudinal ends 53F, 53F and extending in the lateral direction, the ventral longitudinal direction of the non-fiber accumulation portion 45 is preferred. The end 45F is located on the imaginary line L2, or is imaginary straight The portion near the line L2 and closer to the intersection point C than the imaginary line L2. According to the above configuration, the non-fiber accumulation portion 45 which can be worn in the groin portion of the wearer's crotch portion and the one that surrounds the wearer's leg can be used to complement the leg pleats, thereby enabling further improvement. Improve the serviceability and leakage prevention effect. If the ventral longitudinal end 45F of the non-fiber accumulation portion 45 is located closer to the ventral longitudinal end 5F of the absorbent body 5 than the imaginary straight line L2, it is easy to wear the diaper 1 due to the influence of the non-fiber accumulation portion 45. The ventral portion 1F produces wrinkles.

Here, the term "the vicinity of the imaginary straight line L2 and closer to the intersection point C than the imaginary straight line L2" means the unfolded state of the absorbent body 5 (diaper 1) as shown in Fig. 1 and a pair of side panels 6, 6 In the natural state, the imaginary straight line L2 is within 15% of the entire length X of the absorbent body 5 from the intersection C side (the lower portion 1M side), and preferably within 10%.

Further, 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 longitudinal end of the elastic member 53 in the longitudinal direction. In other words, the "portable portion of the elastic member 53" is fixed to the side of the side flap portion 50 in an extended state, for example, at the ventral end portion of the elastic member 53 in the longitudinal direction (that is, the ventral end portion in the longitudinal direction and its vicinity). When the side flap portion 50 is not fixed, the front end portion in the longitudinal direction does not have stretchability, and therefore it is not the "ventral side longitudinal end 53F of the elastic member 53".

In the same manner, as shown in FIG. 1 , when the absorptive main body 5 is formed in a planar shape and is in an unfolded state, and each of the pair of side sheets 6 and 6 is set to a natural state, It is preferable that the back side longitudinal end 53R of the leg gather forming elastic member 53 is located in the vicinity of each of the two imaginary straight lines L1, L1. In this way, the longitudinal end of the elastic member 53 which is compliant with the leg gathers around the leg of the wearer is located on the imaginary straight line L1 which becomes the crease when the stretched adhesive tape 7 is stretched in the wearing operation of the diaper 1 In the vicinity, the wearability of the crotch portion of the wearer can be further improved, in particular, the leakage prevention effect can be further improved.

Here, the "near vicinity of the imaginary straight line L1" refers to the unfolded state of the absorbent body 5 (diaper 1) as shown in Fig. 1 and in the natural state of each of the pair of side sheets 6, 6 from the imaginary straight line L1. One side and the other side of the longitudinal direction X are respectively within 15% of the entire length X of the absorbent body 5, preferably within 10%.

Further, the "rear longitudinal end 53R" of the elastic member 53 is the back side longitudinal end of the elastic member 53 in the same manner as the above-described "ventral longitudinal end 53F" of the elastic member 53.

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

Further, the larger the length (i.e., the width) of the lateral direction Y of the non-fiber accumulation portion 45, the more the flexibility of the diaper 1 (the lower portion 1M) in the non-fiber accumulation portion 45 is increased, so that it is easy to form the non-fiber accumulation portion 45. The creases, but the width of the non-fiber stacking portion 45 is changed, resulting in a decrease in the absorption performance of the absorbent core 40. In view of the above, the width of the non-fiber accumulation portion 45 with respect to the lateral direction of the absorbent core 40 is from the viewpoint of the flexibility at the non-fiber accumulation portion 45, that is, the balance between the easiness of formation of the crease and the absorption performance. The portion having the narrowest length (i.e., width) is preferably 3% or more, more preferably 5% or more, and further preferably 30% or less, further preferably 25% or less, and more specifically, preferably. It is 3% or more and 30% or less, and more preferably 5% or more and 25% or less.

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

Further, as shown in FIG. 2, in the arrangement portion of the two non-fiber accumulation portions 45 and 45 in the absorbent core 40, a fiber accumulation portion 46 is present on both sides of the lateral direction Y of each of the non-fiber accumulation portions 45, and the fiber is present. 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 one of the side edges of the absorbent core 40 along the longitudinal direction X, the fiber accumulation portions 46, 46, and the two non-fiber accumulation portions 45, The total of three fiber deposition portions 46 of one of the 45 fiber accumulation portions 46 is preferably two non-conformities from the viewpoint of the conformability (flexibility of the non-fiber accumulation portion 45) and the absorption performance. In the portion where the fiber stacking portions 45 and 45 are disposed, the length (i.e., the width) of the lateral direction Y of the absorbent core 40 is the narrowest, and the ratio of the length (i.e., the width) of the lateral Y of the three fiber stacking portions 46 is 1 : 1:1, that is even.

The present invention has been described above, but the present invention is not limited to the above embodiment, and can be appropriately modified.

For example, in the diaper 1 of the above-described embodiment, the number of the non-fiber-packed portions is two. However, in the present invention, the number of the non-fiber-packed portions is not particularly limited, and for example, it may be in the lateral center of the absorbent core. Only one part is formed, and three or more pieces may be formed in parallel in the lateral direction. When considering the absorption property of the absorbent core or the like, the number of the non-fiber-packed portions is preferably from 1 to 3, particularly preferably as the diaper 1, and the center of the transverse direction Y of the absorbent core 40 in the lower portion 1M. The fiber accumulation portion 46 is disposed in the portion (the region including the opposing portion of the excretion portion), and two non-fiber accumulation portions 45 and 45 are disposed on both sides of the lateral direction Y of the fiber accumulation portion 46.

Further, the absorbent article of the present invention is not limited to the unfolded diaper according to the above embodiment, and broadly includes an article for absorbing body fluid (urine, menstrual blood, soft stool, sweat, etc.) discharged from the human body (expanded type) Wearing articles, for example, also include diaper covers, pedestals, and the like.

The following supplementary notes are further disclosed in the above embodiments of the present invention.

<1>

An absorbent article having a longitudinal direction extending from the ventral side of the wearer to the back side via the crotch portion and a transverse direction orthogonal thereto, and having a lower portion in the longitudinal direction, which is disposed at the crotch portion when worn; the ventral portion , which is placed on the belly of the wearer than the lower part of the crotch And a back side portion disposed on a back side of the wearer than the crotch portion; and the absorbent article includes an absorbent body including an absorbent core formed by stacking fibers of the core forming material. And a pair of fixing members are fixed to the lateral edges of the absorbent body in the longitudinal direction from the side edges, and the absorption in the crotch portion is fixed in the crotch portion The core body is formed with a non-fiber accumulation portion extending in the longitudinal direction, and each of the pair of fixing members includes a stretchable portion that is fixed to the absorbent body so as to extend laterally outward from a side edge portion of the absorbent body. a side panel and a fastening tape that is fixed to the side panel so as to extend outward in the lateral direction from the front end portion of the side panel, and the absorbent body is expanded into a planar shape to be in an unfolded state. When the side panel is in a natural state, a portion of the side panel and the fixing portion of the absorbent body which is located at the innermost longitudinal direction and the outermost lateral direction is a side panel fixing point, and the fastening tape is With The portion of the fixing portion of the side panel which is located at the innermost side in the longitudinal direction and the outermost side in the lateral direction is a fixing point of the fastening tape, and the pair of the fixing members are respectively pulled out by the fixing point of the side panel and the fixing point of the fastening tape. a straight line L1. In this case, the rear longitudinal end of the non-fiber accumulation portion is located at or near the intersection of the two imaginary straight lines L1, and the non-fiber accumulation portion faces the absorbent core from the rear longitudinal end. The ventral longitudinal end extends longitudinally.

<2>

The absorbent article according to the above <1>, wherein the absorbent body has a pair of laterally outwardly extending from the front side portion to the back side portion and from both side edges of the absorbent core in the longitudinal direction a side wing portion, in each of the pair of side wing portions, In the longitudinal direction, the elastic member for forming a leg gather is disposed in an extended state, and when the absorbent body is expanded into a planar shape to be in a developed state and the side sheet is in a natural state, a pair of the side flaps are One of the ventral longitudinal ends of the leg pleat-forming elastic member and the ventral longitudinal end of the other leg pleat-forming elastic member are at the same position in the longitudinal direction, and one of the two abdomen is pulled out In the case of the side longitudinal end and the imaginary straight line L2 extending in the lateral direction, the ventral longitudinal end of the non-fiber accumulation portion is located on the imaginary straight line L2 or in the vicinity of the imaginary straight line L2 and closer to the intersection than the imaginary straight line L2.

<3>

The absorbent article according to the above <2>, wherein the vicinity of the virtual straight line L2 and the portion closer to the intersection than the virtual straight line L2 is in the expanded state and in the natural state, the virtual straight line L2 is at the intersection side. A region within 15% of the entire longitudinal length of the absorbent body.

<4>

The absorbent article of any one of the above-mentioned <1> to <3> wherein the absorbent body has a flank portion from the ventral side portion and a longitudinal edge of each of the absorbent cores One of the pair of side flaps is extended laterally outward, and each of the pair of side flaps is provided with an elastic member for forming a leg gather in an extended state so as to extend in the longitudinal direction through the lower portion of the crotch, thereby expanding the absorbent body into a plane When the side sheet is in the unfolded state and the side sheet is in the natural state, the longitudinal end of the back side elastic member is located in the vicinity of 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 as described above In the unfolded state and in the above-described natural state, the imaginary straight line L1 is a region within 15% of the entire longitudinal direction of the absorbent body in one of the longitudinal direction and the other side.

<6>

The absorbent article according to any one of the above-mentioned items, wherein the longitudinal length from the longitudinal end of the back side of the absorbent body to the intersection of the two imaginary straight lines L1 is the absorbent body The total length of the longitudinal direction is 30 to 50%, preferably 35 to 45%.

<7>

The absorbent article according to any one of the above-mentioned items, wherein the back side longitudinal end of the non-fiber accumulation portion is located at an intersection of the two imaginary straight lines L1, or one side from the intersection point to the longitudinal direction and One side is within a region within 15% of the entire longitudinal length of the absorbent body.

<8>

The absorbent article according to any one of the above aspects, wherein the length of the transverse direction of the non-fiber-receiving portion, that is, the width of the transverse direction of the absorbent core, that is, the portion having the narrowest width, is preferably the same. It is 3% or more, more preferably 5% or more, and is preferably 30% or less, and more preferably 25% or less.

<9>

The absorbent article according to any one of the above-mentioned items, wherein the length of the longitudinal direction of the non-fiber-receiving portion is preferably 25% or more with respect to the longitudinal direction of the absorbent core, and further preferably It is 30% or more, more preferably 50% or less, further preferably 45% or less, and 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 above-mentioned <1> to <9> wherein, in the absorbent core, a pair of the non-fiber accumulation portions are present at a specific interval in the lateral direction, and the pair of non-fibers are present a total of 3 between the lateral outer side of each of the stacking portions and the pair of non-fiber stacking portions a fiber accumulation portion having a core forming material constituting the absorbent core in a larger amount than the non-fiber accumulation portion, and a portion of the pair of non-fiber deposition portions in the absorbent core In the transverse direction of the absorbent core, that is, the portion having the narrowest width, the ratio of the length of the transverse direction of the fiber stacking portions at the three places, that is, the width, is 1:1:1, that is, uniform with each other.

<11>

The absorbent article according to any one of the above aspects, wherein the non-fiber-forming portion has no through-holes constituting the core-forming material of the absorbent core.

<12>

The absorbent article according to any one of the above aspects, wherein the non-fiber accumulation portion is located further from the inner side of the ventral side of the absorbent core than the longitudinal end of the absorbent core The crotch portion is continuous throughout the longitudinal side of the back side longitudinal end of the absorbent core in the back side portion.

<13>

The absorbent article according to any one of the above aspects, wherein the absorbent core system has a skin facing surface coated with a skin side wrapping chip, and the non-skin facing surface is a non-skin side wrapping chip. The skin side pack core material is bonded to the non-skin side pack core material in the non-fiber accumulation portion.

<14>

The absorbent article according to the above <13>, wherein the absorbent body comprises a front sheet and a back sheet, and the absorbent core is disposed between the sheets, and the skin side pack is followed by The agent is bonded to the front sheet, and the non-skin side pack core is bonded to the back sheet by an adhesive.

<15>

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

<16>

The absorbent article according to any one of the above aspects, wherein the absorbent core has a single layer structure.

<17>

The absorbent article according to any one of the above aspects, wherein the side panel fixing point is located on the inner side of the lateral direction of the longitudinal direction of the absorbent body.

<18>

The absorbent article according to any one of the above aspects, wherein the fastening tape fixing point is located on the inner side of the side edge of the side panel in the longitudinal direction.

[Industrial availability]

According to the present invention, there is provided an absorbent article which can be worn on the crotch portion of the wearer only when worn in accordance with a usual method, even when worn, and exhibits a high leakage preventing effect.

1‧‧‧ diapers

1F‧‧‧ ventral side

1M‧‧‧胯 lower part

1R‧‧‧ Back side

2‧‧‧Front sheet

4‧‧‧Acceptor

5‧‧‧Absorbing ontology

5F‧‧‧ Ventral longitudinal end

5R‧‧‧back side longitudinal end

5S‧‧‧lateral edge

6‧‧‧ side film

6S‧‧‧ front end

7‧‧‧Buckle belt

8‧‧‧Fixed components

9‧‧‧Fixed area

40‧‧‧Absorbable core

40F‧‧‧ Ventral longitudinal end

40R‧‧‧back side longitudinal end

41‧‧‧ Skin side pack core material

42‧‧‧Non-skin side pack chip

45‧‧‧Non-fiber accumulation

45F‧‧‧ Ventral longitudinal end

45R‧‧‧back side longitudinal end

50‧‧‧Flanking

51‧‧‧Side sheet

52‧‧‧Elastic members for forming three-dimensional pleats

53‧‧‧Elastic members for the formation of leg folds

53F‧‧‧ Ventral longitudinal end

53R‧‧‧back side longitudinal end

55‧‧‧ Ventral flap

60‧‧‧Fixed Department

61‧‧‧Sheet materials

62‧‧‧Flexible components

70‧‧‧Fixed Department

71‧‧‧With substrate

72‧‧‧ Fixed Department

A‧‧‧Side sheet fixation point

B‧‧‧Buckle belt fixing point

C‧‧‧ intersection

CLx‧‧‧ vertical centerline

L1‧‧‧ imaginary straight line

L2‧‧‧ imaginary straight line

X‧‧‧ portrait

Y‧‧‧ horizontal

W‧‧‧ length

Claims (18)

An absorbent article having a longitudinal direction extending from the ventral side of the wearer to the back side via the crotch portion and a transverse direction orthogonal thereto, and having a lower portion in the longitudinal direction, which is disposed at the crotch portion when worn; the ventral portion And the back side portion is disposed on the back side of the wearer than the lower part of the crotch; and the absorbent article is provided with a fiber stack containing the core forming material An absorbent body formed of the absorbent core, and fixed at both side edges of the absorbent body in the longitudinal direction in the back side portion so as to extend laterally outward from the both side edges a pair of fixing members; and the absorbent core in the crotch portion is formed with a non-fibrous stacking portion extending in the longitudinal direction, and the pair of fixing members are respectively included in a lateral direction from the side edge portion of the absorbent body a side panel that is stretched outwardly and fixed to the stretchable side panel of the absorbent body, and a fastening tape that is fixed to the side panel so as to extend outward in the lateral direction from the front end portion in the extending direction of the side panel. Will suck above When the body is expanded into a flat shape and is in an unfolded state, and the side piece is set to a natural state, the portion of the side piece that is located at the innermost longitudinal direction and the outermost side of the lateral direction of the fixing portion of the absorbent body is provided. For the side panel fixing point, a portion of the fixing portion of the fastening tape and the fixing portion of the side panel which is located at the innermost longitudinal direction and the outermost lateral direction is a fixing point of the fastening tape, and the pair of fixing members are respectively pulled out through the fixing member. In the case of the side piece fixing point and the imaginary straight line L1 of the fixing point of the fastening tape, the back side longitudinal end of the non-fiber accumulation portion is located at the intersection of the two imaginary straight lines L1 Or in the vicinity of the intersection, and the non-fibrous stack extends longitudinally from the back longitudinal end toward the ventral longitudinal end of the absorbent core. The absorbent article of claim 1, wherein the absorbent body has a pair of flank extending laterally outward from each of the ventral side portions over the back side portion and from both sides of the longitudinal direction of the absorbent core. In the pair of the side flap portions, the leg gathers forming elastic members are disposed in an extended state so as to extend in the longitudinal direction through the crotch portion, and the absorbent body is expanded into a planar shape to be in an expanded state. When the side panel is in a natural state, the ventral longitudinal end of the leg pleat forming elastic member and the ventral longitudinal end of the other leg pleat forming elastic member of one of the pair of the side flap portions are When the longitudinal direction is at the same position, when the imaginary straight line L2 passing through the longitudinal ends of the two ventral sides and extending in the lateral direction is pulled out, the ventral longitudinal end of the non-fiber accumulation portion is located on the imaginary straight line L2, or an imaginary The vicinity of the straight line L2 and closer to the intersection point than the imaginary straight line L2. The absorbent article according to claim 2, wherein a portion of the vicinity of the virtual straight line L2 and closer to the intersection than the virtual straight line L2 is in the expanded state and in the natural state, the virtual line L2 is at the intersection side A region within 15% of the longitudinal length of the absorbent body. The absorbent article of claim 1, wherein the absorbent body has a pair of flank extending laterally outward from each of the ventral side portions over the back side portion and from both sides of the longitudinal direction of the absorbent core. In the pair of the side flap portions, the leg gathers forming elastic members are disposed in an extended state so as to extend in the longitudinal direction through the crotch portion, and the absorbent body is expanded into a planar shape to be in an expanded state. When the side piece is set to the natural state, The longitudinal end of the back side of the elastic member for forming a leg gather is located in the vicinity of each of the two imaginary straight lines L1. The absorbent article according to claim 4, wherein the vicinity of the imaginary straight line L1 is in the unfolded state and in the natural state, the longitudinal length of the absorbent body is from one of the imaginary straight lines L1 to one of the longitudinal directions and the other side. Within 15% of the area. The absorbent article according to claim 1, wherein the length in the longitudinal direction from the longitudinal end of the back side of the absorbent body to the intersection of the two imaginary straight lines L1 is 30 to 50% of the longitudinal entire length of the absorbent body. The absorbent article according to claim 1, wherein the rear longitudinal end of the non-fiber accumulation portion is located at an intersection of the two imaginary straight lines L1, or one of the longitudinal sides and the other side from the intersection is the absorbent body Within 15% of the full length of the area. The absorbent article according to claim 1, wherein the length of the lateral direction of the non-fiber-forming portion is the same as the length of the transverse direction of the absorbent core, which is 3% or more and 30% or less. The absorbent article according to claim 1, wherein the length of the longitudinal direction of the non-fiber-receiving portion is 25% or more and 50% or less with respect to the longitudinal direction of the absorbent core. The absorbent article of claim 1, wherein the absorbent core has a pair of the non-fiber-receiving portions at a predetermined interval in the lateral direction, and the lateral outer side of the pair of non-fiber-forming portions and the one a fiber accumulation portion is present in a total of three places between the non-fiber accumulation portions, and the fiber deposition portion has a core forming material constituting the absorbent core in a larger amount than the non-fiber deposition portion, and the above-mentioned absorbent core body In the portion where the pair of non-fiber-receiving portions are disposed, the length of the transverse direction of the absorbent core, that is, the portion having the narrowest width, the ratio of the width of each of the three fiber-deposited portions, that is, the width, is 1:1:1, that is, Uniform to each other. The absorbent article of claim 1, wherein the non-fiber accumulation portion is completely absent A through hole constituting a core forming material of the above absorbent core. The absorbent article of claim 1, wherein the non-fibrous stacking portion is located further from the ventral side of the ventral side than the ventral longitudinal end of the absorbent core, and is disposed in the back side portion through the squat portion It is continuous with respect to the inner side of the longitudinal side of the back side of the absorbent core. The absorbent article according to claim 1, wherein the absorbent core system has a skin facing surface covered by the skin side wrapping chip, and the non-skin facing surface is covered by the non-skin side wrapping chip, in the non-fiber stacking portion. The skin side pack core material is joined to the non-skin side pack core material. The absorbent article according to claim 13, wherein the absorbent body comprises a front sheet and a back sheet, and the absorbent core is disposed between the sheets, and the skin side pack is made of an adhesive. And joined to the front sheet, the non-skin side pack core material is joined to the back sheet by an adhesive. The absorbent article of claim 1, wherein the fixing member and the absorbent body are separate members. The absorbent article of claim 1, wherein the absorbent core is a single layer construction. The absorbent article of claim 1, wherein the side panel fixing point is located on the inner side of the lateral direction of the longitudinal direction of the absorbent body. The absorbent article of claim 1, wherein the fastening tape fixing point is located on the inner side of the longitudinal side edge portion of the side panel.