JP2012061138A - Absorbent underpants - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent underpants which prevents leakage from an absorbent body including divided outerwrap materials, and prevents the absorbent body from hindering walking motion of a person who wears the absorbent underpants.SOLUTION: The diaper 1A comprises abdominal-side and back-side sheet members 2A and 2B, the absorbent body 3 which is stretched between and fixed to the abdominal-side and back-side sheet members 2A and 2B, and three-dimensional gathers 4 which are disposed on both sides 3c and 3c of the absorbent body 3, respectively. The absorbent body 3 is provided with a vertically long absorber 33. The absorber 33 is provided with a pair of non-fiber-stacked portions 34 and 34 which are elongated along both side edges 33c and 33c thereof. The pair of non-fiber-stacked portions 34 and 34 extends between the abdominal-side and back-side sheet members 2A and 2B.

Description

  The present invention relates to a pants-type absorbent article such as a disposable diaper.

Conventionally, an abdominal side portion disposed on the wearer's ventral side, a crotch portion disposed on the wearer's crotch portion, an hourglass-like outer covering material extending over the back side portion disposed on the wearer's back side, and the outer packaging An absorptive main body fixed to the inner surface side of the material, and both a side edge of the outer packaging material on the abdominal side and a side edge of the outer packaging material on the back side are joined to each other, and a waist opening and a pair of leg openings A pants-type absorbent article in which is formed is known.
When such a pants-type absorbent article is continuously produced, it is common to form a through hole or notch for forming a leg opening in the belt-shaped raw material of the outer packaging material and remove unnecessary portions as trims. It is.

  In addition, as a conventional pants-type absorbent article, the outer packaging material is divided into an abdominal sheet member disposed on the wearer's belly side and a back sheet member disposed on the wearer's back side, The absorbent main body is fixed so as to be bridged over the abdominal sheet member and the back sheet member, and the left and right side edges of the abdominal sheet member are joined to the left and right side edges of the back side sheet member. There are known pant-type absorbent articles. For example, Patent Literature 1 includes, as such a pant-type absorbent article, a chassis having a front waistline region and a back waistline region, and an absorber disposed from the front waistline region to the back waistline region. Absorbent articles are described. Similarly, Patent Document 2 includes a cylindrical waistline portion including an abdominal exterior sheet and a back exterior sheet, and an interior body connected to the inner surface of the abdominal exterior sheet and the inner surface of the back exterior sheet. A pants-type disposable diaper has been described in which the interior body has an absorbent core having a constricted portion.

WO2008-069279 JP 2008-253285 A

  The pants-type absorbent article in which the outer packaging material is divided into the abdominal sheet member arranged on the wearer's ventral side and the back side sheet member arranged on the wearer's back side is obtained from the strip-shaped raw fabric of the outer packaging material Therefore, it is possible to reduce the trim cost to be removed and the like, so that the manufacturing cost can be suppressed, the burden on the manufacturing equipment can be suppressed, and the environment is friendly. However, the pant-type absorbent article divided into the ventral sheet member and the back-sheet member is legless compared to the pant-type absorbent article provided with the hourglass-shaped outer packaging material and the absorbent main body described above. There was no site covering the surroundings, and there was a problem regarding leakage from the absorbent main body.

The absorbent article described in Patent Literature 1 includes a pair of side low rigidity portions formed at substantially equal intervals on both sides in the width direction of the absorbent body. Since it is not formed between the front waistline area and the back waistline area, pockets cannot be formed in the absorbent body when worn, and leakage cannot be prevented.
Moreover, the pants-type disposable diaper described in Patent Document 2 uses a so-called hourglass-type absorbent core in order to eliminate the appearance and discomfort of the crotch part. For this reason, pockets cannot be formed in the absorbent core when worn, and anxiety about leakage at the crotch cannot be wiped out, and leakage cannot be prevented.

  Accordingly, an object of the present invention is to provide a pants-type absorbent material in which the outer packaging material is divided into a ventral sheet member arranged on the wearer's ventral side and a dorsal sheet member arranged on the wearer's dorsal side. An object of the present invention is to provide a pant-type absorbent article that can prevent leakage from the absorbent main body while being an article, and that the absorbent main body does not hinder the walking motion of the wearer when worn.

  The present invention relates to a horizontally-long rectangular abdominal sheet member disposed on the stomach side of the wearer, a horizontally-long rectangular back side sheet member disposed on the back side of the wearer, the abdominal sheet member, and A pants-type absorbent article comprising an absorbent main body that is fixed over the back seat member and three-dimensional gathers disposed on both sides of the absorbent main body, wherein the absorbent main body is vertically long The absorbent body has a pair of non-stacked fiber portions extending along the longitudinal direction, and each of the pair of non-stacked fiber portions includes the ventral sheet member and the back. A pant-type absorbent article straddling the side sheet member is provided.

  According to the underpants-type absorbent article of the present invention, the outer packaging material is divided into an abdominal sheet member disposed on the wearer's belly side and a back sheet member disposed on the wearer's back side. Although it is a pants-type absorbent article, the absorbent main body hardly interferes with the walking motion of the wearer when worn, and leakage from the absorbent main body can be prevented.

Drawing 1 is a figure showing the use state (wearing state) of the underpants type disposable diaper which is a 1st embodiment of the present invention, (a) is a figure seen from the ventral part side, and (b) is a side. The figure seen from the direction, (c) is the figure seen from the back side part side. FIG. 2 is a plan view of the expanded and elongated state of the pant-type disposable diaper shown in FIG. 1 as viewed from the top sheet side. The expanded and extended state means that the side seal part is peeled off to make the pant-type absorbent article in an expanded state, and the expanded absorbent member is stretched to the elastic member of each part, and the design dimensions (influence of the elastic member) Is the same as the dimension when the sheet is expanded in a flat state with all of the above removed. FIG. 3 is an enlarged plan view of a main part showing the relationship between the absorbent body and the ventral sheet member of the pant-type disposable diaper shown in FIG. 4 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 5: is the top view which looked at the expansion | deployment and expansion | extension state of the underpants type disposable diaper which is 2nd Embodiment of this invention from the surface sheet side. FIG. 6: is the top view which looked at the expansion | deployment and expansion | extension state of the underpants type disposable diaper which is 3rd Embodiment of this invention from the surface sheet side. 7 is a cross-sectional view taken along line X2-X2 of FIG. FIG. 8 is a cross-sectional view (corresponding to FIG. 7) of a pants-type disposable diaper that is another embodiment of the present invention.

  Hereinafter, the underpants type absorbent article of the present invention will be described based on the preferred first embodiment with reference to FIGS.

The pants-type disposable diaper 1A of the first embodiment (hereinafter also referred to as “diaper 1A”) is a horizontally-long rectangular ventral sheet disposed on the abdomen side of the wearer as shown in FIGS. A member 2A, a horizontally-long rectangular backside sheet member 2B disposed on the back side of the wearer, an absorptive main body 3 fixed over the abdomen side sheet member 2A and the backside sheet member 2B, and absorption And three-dimensional gathers 4 disposed on both side portions 3c and 3c of the sex main body 3, respectively. In the diaper 1A of the first embodiment, a part of both side edges 2a, 2a of the abdominal sheet member 2A and a part of both side edges 2b, 2b of the back sheet 2B are joined and shown in FIG. As described above, the waist opening WO and the pair of leg openings LO and LO are formed.
As shown in FIGS. 1 and 2, the diaper 1 </ b> A is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.

  The diaper 1A of the first embodiment will be described in detail. The diaper 1A is in the longitudinal direction (hereinafter referred to as “Y direction” in the extended state of the diaper 1A (see FIG. 2). Y direction: direction parallel to the center line CL. In the case of wearing, the abdominal side A disposed on the abdomen side of the wearer, the back side part B disposed on the back side of the wearer, and the abdominal side part A and the back side part B It has a crotch part C which is located in between and is arranged in a wearer's crotch part. The width direction of the diaper 1 </ b> A is a direction orthogonal to the longitudinal direction (Y direction) (hereinafter referred to as “X direction”).

The absorbent main body 3 of the diaper 1A has a vertically long absorbent body 33 as shown in FIGS. 2 and 4, and the absorbent body 33 extends along the vertical direction (along both side edges 33c and 33c). It has a pair of non-stacking fiber parts 34 and 34 extended. Specifically, as shown in FIGS. 2 and 4, the absorbent main body 3 is disposed between the liquid-permeable top sheet 31, the liquid-impermeable or water-repellent back sheet 32, and both sheets 31 and 32. As shown in FIG. 2, it is formed in a rectangular shape that is long in the vertical direction (Y direction). The absorbent body 33 is composed of an aggregate of fibers such as pulp fibers or an absorbent core in which water-absorbing polymer particles are held, and a core wrap sheet (not shown) that covers the absorbent core. The absorber 33 is also formed in a rectangular shape that is long in the vertical direction (Y direction). As shown in FIG. 2, the absorbent body 33 has a pair of non-stacked fiber portions 34 lacking pulp fibers, water-absorbing polymer particles, and the like in the absorbent core. Here, the “missing non-stacked portion” is a state in which pulp fibers, water-absorbing polymer particles, etc. are all missing and not stacked at all, and are slightly stacked at about 30 g / m ² . The state also means that it can have the same effect. However, in order to obtain a reliable effect, it is preferable to be in a piled state of 20 g / m ² or less.

  The basis weight is measured, for example, as follows. The absorbent body 33 of the absorbent main body 3 is taken out from the diaper 1A, the core wrap sheet is removed from the taken out absorbent body 33, and the absorbent core is taken out. A part including the non-stacked fiber portion 34 is cut out with a predetermined width from the extracted absorbent core, and this is taken as a cut sample of the non-stacked fiber portion 34. The weight of this cut sample is measured using an electronic balance with a minimum display of 1 mg, and is calculated by converting to a basis weight. In addition, in order to raise the measurement precision of a basic weight, it is preferable to collect | require a cut sample from several diapers 1A, and obtain | require the average of five or more measured values.

  In the first embodiment, the absorbent body 33 has a high basis weight portion 35 as shown in FIG. More specifically, in the first embodiment, the absorbent core constituting the absorber 33 is larger than the T-shaped upper absorbent layer and the upper absorbent layer in the vertical direction (Y direction) as shown in FIG. The high-basis weight portion 35 has a skin contact of the lower absorbent layer from the end of the lower absorbent layer on the ventral side A side to the crotch C. It is formed in a T shape by being superimposed on the surface side. As shown in FIG. 2, each of the pair of non-stacking portions 34 of the absorbent body 33 is disposed between the X direction outer edge of the absorbent body 33 and the X direction outer edge of the high basis weight section 35. It extends along the side edge portion 33 c and extends along the outer edge portion of the T-shaped high basis weight portion 35. By making the upper absorbent layer into a T-shape as in the first embodiment, the absorber 33 can be efficiently arranged on the front side and the crotch part, which has a high probability of being used in the actual situation, and the crotch part is further increased. The leakage from C can be prevented.

The basis weight of the high basis weight portion 35 is higher than the basis weight of the portion excluding the high basis weight portion 35 and the non-stacked fiber portion 34, and specifically, is preferably 100 to 400 g / m ² . In addition, it is preferable that the basic weight of the site | part except the high basic weight part 35 and the non-stacking fiber part 34 is 50-200 g / m < ² >. The basis weight is measured based on the basis weight measurement described above, for example.

  In the first embodiment, the ventral sheet member 2A of the diaper 1A extends downward along the ventral sheet member main body 20A and the lower edge 200 of the ventral sheet member main body 20A when worn, as shown in FIG. It has a ventral side extending portion 21A. Here, “downward” means a direction toward the center CT (see FIG. 2) of the diaper 1A in the longitudinal direction (Y direction) of the diaper 1A. Specifically, the ventral sheet member body 20A has a long rectangular shape in the diaper width direction (X direction) in the extended state of the diaper 1A (see FIG. 2), and is along the diaper longitudinal direction (Y direction). It has a pair of left and right side edges 20a, 20a. The ventral extension portion 21A extends downward from the ventral sheet member main body 20A along the lower edge 200 of the ventral sheet member main body 20A. In the extended state of the diaper 1A (see FIG. 2), the diaper width direction It has a long rectangular shape in the (X direction) and has a pair of left and right side edge portions 21a, 21a along the vertical direction of the diaper (Y direction).

  In the first embodiment, the back side sheet member 2B of the diaper 1A extends downward along the back side sheet member main body 20B and the lower edge 200 of the back side sheet member main body 20B when worn as shown in FIG. The back side extension part 21B to take out is provided. Here, “downward” means a direction toward the center CT (see FIG. 2) of the diaper 1A in the longitudinal direction (Y direction) of the diaper 1A, similarly to the ventral sheet member 2A. Specifically, the back side seat member main body 20B has a long rectangular shape in the diaper width direction (X direction) in the extended state of the diaper 1A (see FIG. 2), and is along the diaper longitudinal direction (Y direction). It has a pair of left and right side edges 20b, 20b. The back extension part 21B extends downward from the back side sheet member main body 20B along the lower edge 200 of the back side sheet member main body 20B. In the extended state of the diaper 1A (see FIG. 2), the diaper width direction It has a long rectangular shape in the (X direction) and has a pair of left and right side edge portions 21b, 21b along the diaper longitudinal direction (Y direction).

  For the diaper 1A of the first embodiment, a part of both side edges 2a, 2a of the abdominal side sheet member 2A and a part of both side edges 2b, 2b of the back side sheet 2B are joined together to form a waist opening WO. A pair of leg openings LO, LO are formed. Specifically, as shown in FIG. 2, the side edge portions 20a, 20a of the abdominal sheet member body 20A and the side edge portions 20b, 20b of the back side sheet member body 20B are joined in the entire region, and the abdomen extends. The side edge portions 21a, 21a of the portion 21A and the side edge portions 21b, 21b of the back side sheet member main body 20B are not joined. In this way, the side edges 20a, 20a of the abdominal sheet member main body 20A and the side edges 20b, 20b of the back side sheet member main body 20B are joined, and the diaper 1A has side walls as shown in FIG. Seal portions 5 and 5 are formed, and a waist opening WO and a pair of leg openings LO and LO are formed. For this joining, for example, a heat seal, a high frequency seal, an ultrasonic seal, an adhesive, or the like is used.

  The length La of the abdominal sheet member 2A is preferably 10 to 40%, particularly 15 to 35% of the total length L of the diaper, and the length Lb of the back side sheet member 2B is 20 to 40%, particularly 25 to 25% of the total length L of the diaper. 35% is preferred. The length L2 of the ventral side extension portion 21A is preferably 5 to 100% of the length L1 of the side seal portion 5 (abdominal side sheet member body 20A), and more preferably 25 to 70%. Furthermore, the length L2 of the ventral side extension 21A is preferably 5 to 50% of the length La of the ventral sheet member 2A, and more preferably 10 to 40%. The length L3 of the back extension part 21B is preferably 5 to 100% of the length L1 of the side seal part 5 (back side sheet member body 20B), and more preferably 25 to 70%. Furthermore, the length L3 of the back-side extension portion 21B is preferably 10 to 50% of the length Lb of the back-side seat 2B, and more preferably 20 to 40%. In addition, in the case of the infant diaper, the extension lengths L2 and L3 of the abdominal extension part 21A and the back extension part 21B are preferably 10 to 70 mm, and 20 to 60 mm. In the case of an adult diaper, it is preferably 15 to 110 mm, and more preferably 30 to 90 mm. In view of clothing, the extension lengths L2 and L3 of the abdominal extension part 21A and the back extension part 21B are in a relationship of L2 <L3 from the viewpoint that the front and back can be visually determined. It is preferable.

  As shown in FIG. 2, each of the abdominal sheet member 2 </ b> A and the back sheet 2 </ b> B is arranged in a state of being separated in the vertical direction (Y direction) and extended in the width direction (X direction). An elastic member 24 is provided. More specifically, as described above, the ventral sheet member 2A of the diaper 1A includes the ventral sheet member main body 20A and the ventral extension part 21A as shown in FIG. 2, and the backside sheet member 2B of the diaper 1A. Is provided with a back side sheet member main body 20B and a back side extending portion 21B, and each of the abdominal side sheet member main body 20A and the back side sheet member main body 20B is in the vertical direction (Y direction) as shown in FIG. The elastic member 24 has a plurality of elastic members 24 that are spaced apart and extended in the width direction (X direction), and each of the abdominal extension portion 21A and the back extension portion 21B is also illustrated in FIG. As shown in FIG. 4, the elastic member 24 has a plurality of elastic members 24 that are arranged apart from each other in the vertical direction (Y direction) and extended in the width direction (X direction). Each of the ventral sheet member 2A (the ventral sheet member main body 20A, the ventral extension part 21A) and the dorsal sheet member 2B (the dorsal sheet member main body 20B and the dorsal extension part 21B) in the diaper 1A is shown in FIG. As shown in FIG. 2, the outer layer sheet 22 that forms the outer surface of the diaper, the inner layer sheet 23 disposed on the inner surface side of the outer layer sheet 22, and a plurality of the sheets 22 and 23 that extend in the width direction (X direction). The plurality of elastic members 24 are arranged apart from each other in the vertical direction (Y direction). When the elastic member 24 contracts, the waist elastic part G1, the waist elastic part G2, An extended portion G3 is formed. In the diaper 1A of the first embodiment, as shown in FIG. 2, the outer layer sheet 22 is further longitudinally than a region where a plurality of thread-like elastic members 24 are sandwiched and fixed by the outer layer sheet 22 and the inner layer sheet 23 ( The extension area | region which has the length extended in the Y direction) and extended rather than the inner layer sheet | seat 23 in the outer layer sheet | seat 22 is return | folded by the absorptive main body 3 side, and the longitudinal direction (Y Direction) and extends to a position covering the end portions 3a, 3b, and is bonded to the inner layer sheet 23 via an adhesive (not shown).

  As shown in FIG. 2, the waist stretchable part G1 is formed outwardly from the end portions 3a and 3b in the longitudinal direction (Y direction) of the absorbent main body 3 in each of the abdominal sheet member 2A and the back sheet member 2B. Has been. The waist elastic part G2 includes a waist elastic part G1 and an abdominal extension part 21a or a back extension part 21b in the longitudinal direction (Y direction) of the diaper 1A in each of the abdominal sheet member 2A and the back sheet member 2B. Is formed between. The extension part stretchable part G3 is formed in the ventral side extension part 21a and the back side extension part 21b.

  The elastic member 24 forming the waist stretchable part G1 extends over the entire width of the abdominal sheet member 2A and the back sheet member 2B. In the first embodiment, the elastic member 24 that forms the waistline expansion / contraction part G2 and the extension part expansion / contraction part G3 has the elasticity of the elastic member 24 by heat treatment or the like in a portion that overlaps the absorber 33 of the absorbent main body 3. The elastic member 24 does not exist or is not provided with elasticity to the abdominal seat member 2A and the back seat member 2B even if the elastic member 24 is present by losing or cutting the elastic member 24. In a portion other than the portion overlapping with the absorbent body 33, it extends in the width direction (X direction) so as to impart stretchability to the abdominal sheet member 2A and the back sheet member 2B.

As described above, in the diaper 1 of the first embodiment, the ventral sheet member 2A is also formed with the ventral extension part 21A. Therefore, when the diaper 1 is viewed from the ventral part A side, the loincloth Thus, the appearance is good.
Moreover, in the diaper 1 of 1st Embodiment, the extension part expansion-contraction part G3 formed in each of the abdominal extension part 21A and the back extension part 21B is shrink | contracted moderately with the elastic member 24 distribute | arranged to each. Therefore, when the diaper 1 is worn, the side edge portion 21a existing in the ventral side extending portion 21A of the ventral side sheet member 2A and the side edge portion 21b existing in the back side extending portion 21B of the back side sheet member 2B are provided. As shown in FIG. 1 (b), it is divided into an abdominal side direction and a dorsal side direction and opens in an inverted Y shape. Therefore, the appearance when the diaper 1 is viewed from the side is good, and an impression that it is difficult to leak is given.

  Further, as described above, in the diaper 1 of the first embodiment, the ventral sheet member 2A is also formed with the ventral extension portion 21A, and the ventral extension portion 21A expands and contracts in the lateral direction of the diaper. Since the extending part extending and contracting part G3 is formed, the abdomen extending part 21A abuts on the surface so as to cover the buttocks, and when urination is performed, the increased weight is used as the abdominal extending part 21A. In addition, it is supported by the abdominal sheet member main body 20A and the back side sheet member main body 20B thereon, and rubber marks or the like are less likely to be attached to the legs due to the dispersion of pressure.

  Further, as described above, in the diaper 1 of the present embodiment, the back side sheet member 2B also has the back side extension part 21B, and the extension part extension part G3 that extends and contracts in the diaper lateral direction is formed. Therefore, the back extension part 21B abuts on the surface so as to cover the buttocks, and the conventional diaper (the both side edges of the abdominal sheet member 2A and the both side edges of the back sheet member 2B are in the vertical direction of the diaper). Compared to the diapers that are joined in the entire area), it is difficult for a part of the buttocks of the wearer to protrude.

  In the absorbent main body 3, the region on the end 3a side in the longitudinal direction (Y direction) is fixed to the ventral sheet member 2A via the adhesive 7, and the region on the end 3b side in the longitudinal direction (Y direction) is The back sheet member 2B is fixed via an adhesive 7. Specifically, as shown in FIG. 2, the adhesive 7 on the ventral side A of the diaper 1A of the first embodiment is between the outer edges of both side portions 3c and 3c of the absorbent main body 3 in the X direction. In the Y direction, including a virtual line connecting tips of ventral side end portions 34a described later in the pair of non-stacking portions 34 of the absorbent body 33, the coating is applied outward from the virtual line. From the viewpoint of the appearance of the ventral extension portion 21A, as shown in FIG. 2, the position between the virtual line and the lower edge 200 of the ventral seat member body 20A is preferable in the Y direction. More preferably, the coating is also applied outward.

Moreover, as shown in FIG. 2, the adhesive 7 on the back side B of the diaper 1A of the first embodiment spans between the outer edges of the both side portions 3c, 3c of the absorbent main body 3 in the X direction. In the Y direction, it includes an imaginary line that connects the tips of the back side end portions 34b described later in the pair of non-stacking portions 34 of the absorbent body 33, and is applied outward from the imaginary line. In view of preventing the protrusion of the collar portion, it is more preferable that the coating is applied outward from the position overlapping the virtual line in the Y direction as shown in FIG.
In the diaper 1A of the first embodiment, the distance between the edge on the inner side in the Y direction of the adhesive 7 in the back side portion B and the tip of a back side end portion 34b described later in the pair of non-stacking fiber portions 34. However, it is formed shorter than the distance between the edge on the inner side in the Y direction of the adhesive 7 in the ventral side A and the tip of the ventral side end 34a described later in the pair of non-stacking fibers 34.

  As shown in FIG. 2, each of the pair of non-stacking portions 34 of the absorbent body 33 straddles the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B, and in the diaper 1 </ b> A of the first embodiment, The longitudinal side (Y direction) of the fiber stacking part 34 overlaps the ventral side extension part 21A, and the back side end part 34b of the non-fibering part 34 in the vertical direction (Y direction) extends backside. It overlaps with the part 21B. More specifically, each of the pair of non-stacking fiber portions 34 includes, in the diaper 1A of the first embodiment, a ventral side end portion 34a in the vertical direction (Y direction) of the non-stacking fiber portion 34 as shown in FIG. From the position overlapping with the ventral extension portion 21A in the ventral seat member 2A, the back end portion 34b in the longitudinal direction (Y direction) of the non-stacking portion 34 is the back extension portion 21B in the back seat member 2B. It extends along the side edge 33c of the absorber 33 to a position where it overlaps.

The width W1 of the absorbent body 33 in the width direction (X direction) is 35 to 65% of the width W in the width direction (X direction) in the state shown in FIG. 2 of the ventral sheet member 2A and the back sheet member 2B, particularly 40%. It is preferably ˜60%. The width W2 of each non-stacked portion 34 in the width direction (X direction) is such that the absorbent body 33 is convex outward so as not to restrain the movement of the foot during walking while fitting around the foot when the diaper is worn. From the viewpoint of easily forming a pocket and securing sufficient absorption performance in the crotch C, it is preferably 2 to 30%, particularly 5 to 20%, of the width W1 of the absorbent body 33. The width W2 of each non-stacked fiber portion 34 is preferably 2 to 30 mm, more preferably 5 to 25 mm in the case of an infant diaper, and 3 to 3 in the case of an adult diaper. It is preferable that it is 40 mm, and it is more preferable that it is 5-30 mm.
The length L5 of the non-stacked portion 34 in the longitudinal direction (Y direction) is preferably 20 to 70%, particularly 30 to 60%, of the length L4 of the absorbent body 33 in the longitudinal direction (Y direction).

  In the diaper 1A of the first embodiment, the region where the ventral end portion 34a of the non-stacking portion 34 overlaps the ventral extension portion 21A, and the back end portion 34b of the non-stacking portion 34 is the dorsal extension. The elastic member 24 is not arranged in the region overlapping with the protruding portion 21B. Here, “the elastic member 24 is not disposed” means that the elastic member 24 is not present, or even if it is present, the elastic member 24 is disposed in a state in which stretchability is not imparted to the ventral seat member 2A and the back seat member 2B. It is meant to be included. As described above, in the first embodiment, the elastic member 24 that forms the extension part expansion / contraction part G3 does not exist or exists in the portion that overlaps the absorber 33 of the absorbent main body 3. Even so, the ventral sheet member 2A and the dorsal sheet member 2B are arranged in a state that does not impart stretchability. For example, as shown in FIG. The elastic member 24 is not disposed in the region overlapping with the ventral extension portion 21A. In the diaper 1A of the first embodiment, the elastic member 24 that forms the extension / contraction part G3 is not present in the entire region overlapping the absorber 33, or the ventral sheet member 2A and the back side are present even if they exist. Although it is arranged in a state that does not give stretchability to the sheet member 2B, if only the region where the ventral end portion 34a of the non-stacking portion 34 overlaps the ventral extension portion 21A is in such a state. Well, in the region of the absorbent body 33 other than the region where the ventral end portion 34a of the non-stacking portion 34 overlaps the ventral extension portion 21A, there is an elastic member 24 that forms the extension portion stretchable portion G3. It may be.

  In the diaper 1A of the first embodiment, the high basis weight portion 35 of the absorbent body 3 straddles the abdominal extension portion 21A and the back extension portion 21B as shown in FIG. Specifically, as shown in FIG. 2, the T-shaped high basis weight portion 35 is formed from the ventral sheet member body 20A of the ventral sheet member 2A so that the absorption capacity of the ventral sheet member 2A is increased. The ventral side extending part 21A is crossed and the backside extending part 21B of the back side sheet member 2B is disposed.

  In the diaper 1A of the first embodiment, the three-dimensional gathers 4 disposed on both side portions 3c, 3c of the absorbent main body 3 have a width from the side portion 3c of the absorbent main body 3 as shown in FIGS. It consists of a first three-dimensional gather 4a extending inward in the direction (X direction) and a second three-dimensional gather 4b extending outward in the width direction (X direction) from the side 3c of the absorbent main body 3. Each of the first three-dimensional gather 4a and the second three-dimensional gather 4b is in a stretched state in the longitudinal direction (Y direction) of the three-dimensional gather forming sheet 40 and the three-dimensional gather forming sheet 40 in the expanded and expanded state of the pant-type absorbent article. And a plurality of elastic members 41 arranged in a. Specifically, in the diaper 1A of the first embodiment, as illustrated in FIG. 4, the three-dimensional gather forming sheet 40 is a single sheet, which is a top portion on the free end side of the first three-dimensional gather 4a. The sheet is folded in two along the fold line to form a two-ply sheet, and a plurality of elastic members 41 extending in the vertical direction (Y direction) are arranged between the two ply sheets and fixed with an adhesive to form a first solid. A gather 4a is formed.

  Furthermore, in the diaper 1A of the first embodiment, as shown in FIG. 4, the double-stacked sheet extends outward in the width direction (X direction) and becomes the top portion on the free end side of the second three-dimensional gather 4b. The sheet is further folded in two along the fold line to form a four-ply sheet, and a plurality of elastic members 41 extending in the vertical direction (Y direction) are provided between the two-ply sheets constituting the four-ply sheet. The second three-dimensional gather 4b is formed by being arranged and fixed by an adhesive. In the diaper 1A of the first embodiment, the top sheet 31 is formed longer in the width direction (X direction) than the back sheet 32 as shown in FIG. It is formed at a position slightly outward from the extended portion of the topsheet 31 extending from the outer edge in the width direction (X direction) 33 and the outer edge in the width direction (X direction) of the absorber 33. The first linear joint 6a is joined and integrated. In addition, as shown in FIG. 4, the leading end portion of the two-layered sheet described above is finally disposed between the absorber 33 and the back sheet 32 and joined and integrated with an adhesive. The first three-dimensional gather 4a formed in this way stands up in the width direction (X direction) inward (center line CL side) toward the wearer's skin side by contraction of the plurality of elastic members 41. Further, the second three-dimensional gather 4b formed in this manner is outward in the width direction (X direction) toward the wearer's skin side (on the opposite side to the center line CL) due to the contraction of the plurality of elastic members 41. Stand up.

  The 1st linear junction part 6a is extended along each both-sides edge part of the rectangular-shaped absorptive main body 3, and is extended over the full length of the vertical direction (Y direction) of the absorptive main body 3. FIG. The first linear joint portion 6a is preferably formed in a continuous linear shape, but may be formed in a dotted line shape. Moreover, as a joining method at the time of forming the 1st linear junction part 6a, various well-known joining methods, such as a heat seal, an ultrasonic seal, a high frequency seal, and an adhesive agent, are used.

  In the diaper 1A of the first embodiment, the plurality of elastic members 41 forming the first three-dimensional gather 4a and the second three-dimensional gather 4b have the end portions on the side of the ventral side A thereof as described above. And the application region of the adhesive 7 applied to fix the ventral sheet member 2A, and the end on the back side B side of the absorbent main body 3 and the back side sheet member 2B described above. It reaches the application region of the adhesive 7 applied for fixing. By arranging the plurality of elastic members 41 forming the first three-dimensional gather 4a and the second three-dimensional gather 4b in this way, the absorbent body 33 of the absorbent main body 3 has an outwardly convex pocket when worn. Is easy to form.

The forming material of the pants-type disposable diaper 1A of the first embodiment will be described.
As the outer layer sheet 22 and the inner layer sheet 23 constituting each of the abdominal sheet member 2A and the back sheet 2B, any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 22 and the inner layer sheet 23, a water-repellent nonwoven fabric or the like can be used.

  As the top sheet 31 and the back sheet 32 constituting the absorbent main body 3, any one can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hydrophilic and liquid-permeable nonwoven fabric can be used as the top sheet 31, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a nonwoven fabric is used as the back sheet 32. be able to.

  As the three-dimensional gather forming sheet 40 that forms the three-dimensional gather 4, any sheet that can be used for absorbent articles such as disposable diapers can be used without particular limitation. For example, as the three-dimensional gather forming sheet 40, a liquid-resistant or water-repellent and breathable stretchable film, nonwoven fabric, woven fabric, or a laminated sheet thereof can be used.

  The elastic member 24 (including the first elastic member 41a) disposed on the stomach member 2A and the back sheet 2B and the elastic gathering member 40 (including the first elastic member 41a) may be natural rubber, polyurethane, polystyrene, A thread-like stretchable material made of a polyisoprene copolymer, a polystyrene-polybutadiene copolymer, a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.

The effect at the time of using the underpants type disposable diaper 1A of 1st Embodiment of this invention mentioned above is demonstrated.
The diaper 1A of 1st Embodiment is equipped with the abdominal sheet member 2A, the back | dorsal sheet member 2B, and the absorptive main body 3, and the absorption which an absorptive main body has as shown in FIG. 1, FIG. In the body 33, a pair of non-stacking portions 34 are disposed along the both side edge portions 33 c and 33 c of the absorbent body 33 so as to straddle the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B. As described above, when a rectangular sheet is used for the abdominal sheet member 2A and the back sheet member 2B, there is no member that covers the legs especially in the crotch C, and the leakage from the crotch C and the crotch It was a big problem that anxiety about the leakage caused by the gap in the part C occurred. In order to solve this problem, it is important how to improve the fit of the absorbent body 33 in the crotch part C to the wearer. When wearing a diaper 1 </ b> A having a pair of non-stacking fiber portions 34 arranged as in the first embodiment, the absorbent body 33 in the crotch C is non-stacked with the formation of the three-dimensional gather 4 by contraction of the elastic member 41. It bends from the part 34 as a starting point, and forms a convex pocket outward. In particular, the non-stacking portion 34 reaches the respective areas where the ventral sheet member 2A and the backside seat member 2B exist, and the ventral sheet member 2A and the backside sheet member 2B, and the non-stacking portion of the absorbent body By not joining at the part where the longitudinal direction end portions overlap, the absorbent body 33 is easily bent in the entire crotch portion C, and the fit to the wearer's skin is further improved. Therefore, the diaper 1A of the first embodiment is a pants-type absorption type that is divided into an abdominal sheet member 2A disposed on the wearer's belly side and a back sheet member 2B disposed on the wearer's back side. The absorbent body 33 of the absorbent main body 3 forms a pocket when worn while being an absorbent article, so that the absorbent main body 3 hardly obstructs the wearer's walking motion and reliably prevents leakage from the absorbent main body. be able to.

  Further, as shown in FIG. 3, the diaper 1 </ b> A of the first embodiment includes a region where the ventral side end portion 34 a of the non-stacking fiber portion 34 overlaps the ventral side extension portion 21 </ b> A and the back of the non-stacking fiber portion 34. In the region where the side end portion 4b overlaps with the back extension portion 21B, the elastic member 24 of the ventral sheet member 2A and the back sheet member 2B is not disposed, and the width of the non-stacking portion 34 is not provided. The elastic member 24 exists from the outer edge in the direction (X direction) to the outer edge in the width direction (X direction) of each of the abdominal sheet member 2A and the back sheet member 2B. Not only the portion 34 itself does not shrink, but also the non-stretched portion 34 is pulled in the width direction (X direction) by the shrinkage force of the elastic member 24, and the shape of the non-stretchable portion that should be the base point of bending becomes even more pronounced , A pocket that protrudes outward at the crotch C DOO further synergistic effect that tends to form so obtained a.

  The diaper 1A of the first embodiment includes a first three-dimensional gather 4a extending inward in the width direction (X direction) from the side portion 3c of the absorbent main body 3, as shown in FIGS. Since the second three-dimensional gather 4b extending outward in the direction (X direction) can be provided, leakage from the absorbent main body 3 can be reduced when worn, and the first three-dimensional gather 4a and the second three-dimensional gather 4b are formed. Due to the contraction force of the plurality of elastic members 41, the absorbent body 33 in the crotch portion C is reliably bent from the non-stacked fiber portion 34, and it is easier to form a convex pocket outward.

  Moreover, as for the diaper 1A of 1st Embodiment, as shown to FIG. 2, FIG. 4, the absorber 3 has the high basic weight part 35, and the high basic weight part 35 has 21 A of ventral side extension parts, and a back side extension. It straddles the protruding part 21B (arranged in the entire crotch part C). Therefore, it is possible to reliably increase the absorption capacity of the entire crotch part C of the diaper 1A of the first embodiment having a problem with the leakage, and leakage from the absorbent main body 3 can be further reduced. Furthermore, the difference in basis weight between the high basis weight portion 35 and the side edge portion 33c of the absorbent body 33 existing in the width direction (X direction) of the non-stacked fiber portion 34 becomes significant, and the non-stacked fiber portion 34 is worn when worn. Further, it is easier to bend from the edge on the high basis weight portion 35 side, and it becomes easier to form a convex pocket outward in the absorber 33.

Next, the underpants type disposable diaper of 2nd Embodiment of this invention is demonstrated based on FIG.
About the underpants type disposable diaper 1B of 2nd Embodiment (henceforth "diaper 1B"), a different point from the underpants type disposable diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated in particular is the same as that of the pants-type disposable diaper 1A, and the description of the pants-type disposable diaper 1A is appropriately applied.

  In the absorbent main body 3 of the diaper 1B of the second embodiment, the region on the end 3a side in the longitudinal direction (Y direction) is fixed via an adhesive 7 applied in a T shape to the ventral sheet member 2A. The region on the end 3b side in the longitudinal direction (Y direction) is fixed via an adhesive 7 applied in an inverted T shape to the back sheet member 2B. More specifically, as shown in FIG. 5, the adhesive 7 on the abdominal side A of the diaper 1 </ b> B of the second embodiment is formed between the outer edges of the side portions 3 c and 3 c of the absorptive main body 3 in the waistline stretchable portion G <b> 2. In the extended portion stretchable portion G3, the stretched portion G3 is applied between the pair of non-stacking portions 34. Similarly, the adhesive 7 on the back side B of the diaper 1B of the diaper 1B of the second embodiment is formed between the outer edges of the both side portions 3c, 3c of the absorptive main body 3 in the waistline stretchable portion G2, as shown in FIG. It is applied between the pair of non-stacked fiber portions 34 in the extending portion stretchable portion G3.

  As shown in FIG. 5, the diaper 1 </ b> B of the second embodiment has a pair of non-stacking portions 34 having a shape different from that of the diaper 1 </ b> A. Specifically, as shown in FIG. 5, the pair of non-stacking portions 34 included in the absorbent body 33 of the diaper 1 </ b> B has a ventral-side end portion 34 a closed on the ventral-side portion A, like the diaper 1 </ b> A. In the back side portion B, the back side end portion 34b is open along the outer edge portion of the high basis weight portion 35 and is not closed. In the diaper 1B of the second embodiment, the elastic member 24 is not arranged in a region where the ventral end portion 34a of the non-stacking portion 34 overlaps the ventral extension portion 21A, and the non-stacking portion 34 The elastic member 24 is not disposed in the open area on the back side B side.

The formation material of the pants-type disposable diaper 1B of 2nd Embodiment is demonstrated.
The forming material of the pants-type disposable diaper 1B of the second embodiment is the same as the forming material of the pants-type disposable diaper 1A of the first embodiment.

The effect at the time of using the underpants type disposable diaper 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
About the effect of the diaper 1B of 2nd Embodiment, a different point from the effect of the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A of 1st Embodiment, and description of the effect of the disposable diaper 1A of 1st Embodiment is applied suitably.

  Moreover, as for the diaper 1B of 2nd Embodiment, as for the absorptive main body 3, the area | region of the edge part 3a side of the vertical direction (Y direction) is applied through the adhesive agent 7 apply | coated to 2 A of belly side sheet members in T shape. The region on the end 3b side in the vertical direction (Y direction) is fixed via an adhesive 7 applied in an inverted T-shape to the back sheet member 2B. That is, in the central part in the width direction (X direction) of the extension part expansion and contraction part G3 corresponding to each of the abdominal sheet member 2A and the back sheet member 2B, since it is fixed to the absorbent main body 3, the aesthetics are good. In addition, as in the first embodiment, the abdomen sheet member 2A and the back sheet member 2B are joined to the longitudinal direction (Y direction) both ends 34a and 34b of the non-stacked fiber portion 34 of the absorbent body 33 at the overlapping portions. Since it is not carried out, the absorber 33 becomes easy to bend in the crotch part C whole area, and the fit property to a wearer's skin improves further.

Next, a pants-type disposable diaper according to a third embodiment of the present invention will be described with reference to FIGS.
About the underpants type disposable diaper 1C of 3rd Embodiment (henceforth "diaper 1C"), a different point from the underpants type disposable diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated in particular is the same as that of the pants-type disposable diaper 1A, and the description of the pants-type disposable diaper 1A is appropriately applied.

  In the absorbent main body 3 of the diaper 1C of the third embodiment, the region on the end 3a side in the longitudinal direction (Y direction) is fixed to the ventral sheet member 2A via the adhesive 7, and the longitudinal direction (Y direction). The region on the side of the end portion 3b is fixed to the back-side sheet member 2B via the adhesive 7. More specifically, in the diaper 1C of the third embodiment, as shown in FIG. 6, the region on the end 3a side of the absorbent main body 3 and the central portion in the width direction (X direction) of the abdominal sheet member 2A, It is applied between the edge in the longitudinal direction (Y direction) of the extending part stretchable part G3 of the abdominal sheet member 2A and the edge of the end part 3a of the absorbent main body 3, and both side parts of the absorbent main body 3 3c and 3c are fixed by the adhesive 7 applied to the entire surface between the edges. Similarly, in the diaper 1C of the third embodiment, as shown in FIG. 6, the region on the end 3b side of the absorbent main body 3 and the central portion in the width direction (X direction) of the back seat member 2B are provided. It is applied between the edge in the longitudinal direction (Y direction) of the extension part expansion / contraction part G3 of the back sheet member 2B and the edge of the end part 3b of the absorbent main body 3, and both sides of the absorptive main body 3 It is fixed by the adhesive 7 applied to the entire surface between the edges of the portions 3c and 3c.

  The diaper 1C of 3rd Embodiment has the absorber 33 of a different structure from the diaper 1A, as shown in FIG. Specifically, as shown in FIG. 6, the absorbent body 33 of the diaper 1 </ b> C does not have the high basis weight portion 35 (upper absorbent layer), and is a rectangular lower absorbent that is long in the vertical direction (Y direction). A single-layer structure consisting of only layers. As with the diaper 1A, the pair of non-stacking portions 34, 34 included in the absorbent body 33 of the diaper 1C has its ventral end portion 34a overlapped with the ventral extension portion 21A, and its dorsal end portion 34b is the dorsal side. It extends along both side edges of the absorber 33 so as to overlap with the extending part 21B. The absorbent body 33 of the diaper 1 </ b> C has a central non-stacking fiber portion 37 at an intermediate position between the pair of non-stacking fiber portions 34, 34, separately from the pair of non-stacking fiber portions 34, 34. The center non-stacking portion 37 has an end portion 37a on the ventral side A in the longitudinal direction (Y direction) on the ventral side from the positions of the ventral end portions 34a and 34a of the pair of non-stacking portions 34 and 34, respectively. The end 37b on the back side B in the longitudinal direction (Y direction) extends to the part A side, and the positions and backs of the ventral side ends 34a, 34a of the pair of non-stacking parts 34, 34 respectively. It extends to a position substantially in the middle of the positions of the side end portions 34b, 34b.

As shown in FIG. 6, the absorbent body 33 of the diaper 1 </ b> C of the third embodiment is a region in which a center non-stacking fiber portion 37 and a pair of non-stacking fiber portions 34, 34 are arranged in parallel in the vertical direction (Y direction). (Hereinafter also referred to as a parallel region). Since the absorbent body 33 has the parallel region, when the diaper is worn, the absorbent body 33 in the parallel region has a central non-stacked fiber portion 37 as a mountain portion and a pair of non-stacked fiber portions 34 and 34 as valley portions. Thus, it bends in a W shape.
When the absorbent body 33 is bent into a W shape in the crotch part C, the absorbent body 33 is flexibly deformed with respect to the pressure applied from the wearer's leg, and the pressure applied to the leg and the resulting resistance or discomfort. Is reduced.

  Moreover, since the part which has the center non-stacking fiber part 37 in the absorptive main body 3 becomes easy to closely_contact | adhere to a wearer's urination part, urine is absorbed into the absorber 33 smoothly. Therefore, it is possible to prevent the urine from flowing on the skin or the surface sheet and leaking from the front, or the urine flowing backward is mixed with the stool and the stool is easily attached to the skin.

  From the viewpoint of obtaining such an effect more reliably, the center non-stacking portion 37 has an end portion 37a on the ventral side A side in the longitudinal direction (Y direction) on the ventral side of the non-stacking portion 34. It is preferably 5 to 40 cm extending from the position of the end 34a, and more preferably 10 to 30 cm.

Moreover, in the diaper 1C of 3rd Embodiment, as above-mentioned, the center non-stacking fiber part 37 has the edge part 37b by the side of the back side B in the vertical direction (Y direction), and a pair of non-stacking fiber part. 34 and 34, the positions of the ventral end portions 34a and 34a and the positions of the dorsal side end portions 34b and 34b are extended to substantially intermediate positions. In other words, on the back side B side of the absorbent body 33, the back side end portions 34b, 34b of the pair of non-stacking fiber portions 34, 34 extend from the positions of the end portions 37b of the central non-stacking fiber portion 37, respectively. I'm out. Therefore, the absorber 33 on the back side B side of the parallel region in the diaper longitudinal direction (Y direction) is not bent at the central non-stacked fiber portion 37 when the diaper is worn, and is paired with the non-stacked fiber portions 34 and 34. Bend. Therefore, in the vicinity of the excretion part (anus) of the stool on the dorsal side B side from the parallel region, a portion where the absorbent body 33 is bent concavely toward the skin side is generated, whereby the skin of the wearer and the absorbent main body 3 are formed. An upward pocket that can hold stool well is formed between the two. Moreover, because urine is quickly absorbed by the absorbent body 33 and guided to the ventral side A side by the presence of the central non-stacked fiber part 37 on the side of the parallel region and the ventral side A thereof, Urine is less likely to mix with stool.
This prevents or greatly reduces the discomfort caused by the close contact of the stool with the skin and the labor of wiping the stool attached to the skin. It also has excellent stool leakage prevention.

  From the viewpoint of obtaining such an effect more reliably, the pair of non-stacking portions 34, 34 has a back side end portion 34 b, 34 b that is 20 to 120 cm from the position of the end portion 37 b of the central non-stacking fiber portion 37. It is preferable to extend, and it is still more preferable to extend 40-100 cm.

  As shown in FIGS. 6 and 7, the absorbent body 33 provided in the diaper 1 </ b> C of the third embodiment is an absorbent body that is arranged in a state of extending in the longitudinal direction (Y direction) on both side edges 33 c and 33 c. It has the elastic member 36 for use. Each absorber elastic member 36 is disposed at the tip of the side edge portion 33c of the absorber 33, and extends between the ventral seat member 2A and the back seat member 2B in a state of extending in the longitudinal direction (Y direction). Are arranged.

  In the diaper 1C of the third embodiment, the three-dimensional gather 4 disposed on both side portions 3c, 3c of the absorbent main body 3 has a width from the side portion 3c of the absorbent main body 3 as shown in FIGS. It consists only of the first solid gathers 4a extending inward in the direction (X direction). The first three-dimensional gather 4a includes a plurality of three-dimensional gather forming sheets 40 and a plurality of the three-dimensional gather forming sheets 40 arranged in an extended state in the longitudinal direction (Y direction) of the pant-type absorbent article in the expanded and expanded state. The elastic member 41 and the intermediate elastic member 42 are formed. Specifically, in the diaper 1C of the third embodiment, as shown in FIG. 7, the three-dimensional gathering sheet 40 is a single sheet, which is the top portion on the free end side of the first three-dimensional gather 4a. The sheet is folded in two along the fold line to form a two-ply sheet, and a plurality of elastic members 41 extending in the vertical direction (Y direction) are arranged between the two ply sheets and fixed with an adhesive to form a first solid. A gather 4a is formed. Further, an intermediate elastic member 42 that is stretched in the longitudinal direction (Y direction) is disposed between the two stacked sheets and slightly outward from the outer edge in the width direction (X direction) of the absorber 33. Thus, the first three-dimensional gather 4a is formed by being fixed with an adhesive.

  In the diaper 1 </ b> C of the third embodiment, as shown in FIG. 7, the top sheet 31 is formed longer in the width direction (X direction) than the back sheet 32, and both side edges 33 c and 33 c of the absorber 33. 7, the portion extending outward in the width direction (X direction) is folded back to the back sheet 3 side of the absorber 33, and the leading end of the above-described double-layered sheet is finally absorbed as shown in FIG. It is arranged between the top sheet 31 folded back to the back sheet 3 side of the body 33 and the back sheet 32, and is integrally joined at a fourth linear joint 6 d formed at the position of the non-stacking portion 34 of the absorbent body 33. It has become. The first three-dimensional gather 4a formed in this way has a width direction (X direction) inward (center line CL side) toward the wearer's skin side due to contraction of the plurality of elastic members 41 and the intermediate elastic member 42. To stand up. In addition, the position of the 4th linear junction part 6d is a position near the centerline CL from the position of the non-stacking fiber part 34 of the absorber 33 or the position of the non-stacking fiber part 34 from a viewpoint of the standing property of a solid gather. It is preferable that

  The 4th linear junction part 6d is extended along each both-sides edge part of the rectangular-shaped absorptive main body 3, and is extended over the full length of the vertical direction (Y direction) of the absorptive main body 3. FIG. The fourth linear joint portion 6d is preferably formed in a continuous linear shape, but may be formed in a dotted line shape. Moreover, as a joining method at the time of forming the 4th linear junction part 6d, various well-known joining methods, such as a heat seal, an ultrasonic seal, a high frequency seal, and an adhesive agent, are used.

  In the diaper 1C of the third embodiment, the plurality of elastic members 41 and the intermediate elastic member 42 forming the first three-dimensional gather 4a are the ventral side end portion 34a and the back side of the non-stacking portion 34 of the absorbent body 33. It arrange | positions in the state which expresses expansion-contraction over between the edge parts 34b. By arranging the plurality of elastic members 41 and intermediate elastic members 42 forming the first three-dimensional gather 4a in this way, the absorbent body 33 of the absorbent main body 3 has an outwardly convex pocket when worn. Easy to form.

The forming material of the pants-type disposable diaper 1C of the third embodiment will be described.
The elastic member 36 for absorbers arranged in the absorber 33 and the intermediate elastic member 42 forming the first three-dimensional gather 4a are elastic members 41 arranged in the three-dimensional gather 4 of the pant-type disposable diaper 1A of the first embodiment. Is the same. Other forming materials are the same as the forming material of the diaper 1A of the first embodiment.

The effect at the time of using the underpants type disposable diaper 1C of 3rd Embodiment of this invention mentioned above is demonstrated.
About the effect of 1 C of diapers of 3rd Embodiment, a different point from the effect of 1 A of diapers of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A of 1st Embodiment, and description of the effect of the disposable diaper 1A of 1st Embodiment is applied suitably.

The diaper 1C of 3rd Embodiment has the elastic member 36 for absorbers in each of the both-sides edge parts 33c and 33c of the absorber 33, as shown in FIG. Moreover, as for the diaper 1C of 3rd Embodiment, as shown to FIG. 6, FIG. 7, the absorber 33 has a pair of non-stacking fiber parts 34 and 34, and a pair of non-stacking fiber parts 34 and 34 is a center. It has a non-stacking portion 37. Therefore, the side edges 33c and 33c of the absorbent body 33 provided with the absorbent elastic member 36 are easily lifted when worn, and the absorbent body 33 in the crotch C is bent from the non-stacked fiber portion 34 and protrudes outward. It is easy to form a pocket.
Moreover, since both side edge parts 33c and 33c of the absorber 33 are not restrained by the 1st solid gathers 4a as shown in FIG. 7, as shown in FIG. 6, the absorptive main body 3, the ventral sheet member 2A, and Even if it is fixed by the adhesive 7 in almost the entire region where each of the back sheet members 2B overlaps, the standing property of the side edges 33c, 33c of the absorbent body 33 in the crotch part C is not impaired. From the viewpoint of appearance as clothes, it is better that the abdominal extension part 21A of the abdominal sheet member 2A and the dorsal extension part 21B of the dorsal sheet member 2B are bonded to the absorbent body 33. On the back side, such a specification form is preferable from the viewpoint of preventing the protrusion of the buttocks.

  The pants-type absorbent article of the present invention is not limited to the pants-type disposable diapers of the first, second, and third embodiments described above, and can be changed as appropriate. Moreover, each component in the underpants type disposable diaper of the above-mentioned 1st, 2nd, 3rd embodiment can be implemented in combination suitably in the range which does not impair the meaning of this invention.

  For example, in the pants-type disposable diapers 1A, 1B, and 1C of the first, second, and third embodiments described above, as shown in FIGS. 2, 5, and 6, the ventral sheet member 2A is a ventral sheet. 20 A of member main bodies, and the stomach side extension part 21A extended below along the lower edge 200 of the stomach side sheet member main body 20A at the time of wear are provided, and the back seat 2B is the back side seat member main body 20B, and Although the back side extension part 21B is provided, one of the abdominal side extension part 21A and the back side extension part 21B may not be provided, and neither may be provided.

  In the pants-type disposable diaper 1C of the third embodiment, as shown in FIG. 8, the three-dimensional gather 4 extends from the side 3c of the absorbent main body 3 inward in the width direction (X direction). 4a and a second solid gather 4b extending outward in the width direction (X direction) from the side 3c of the absorbent main body 3 may be formed. Specifically, each of the first three-dimensional gather 4a and the second three-dimensional gather 4b shown in FIG. 8 is a vertical gathering of the three-dimensional gather forming sheet 40 and the three-dimensional gather forming sheet 40 in the expanded and expanded state of the pant-type absorbent article. It is formed from a plurality of elastic members 41 arranged in an extended state in the direction (Y direction). As shown in FIG. 8, the three-dimensional gather forming sheet 40 is a single sheet that is folded in two along a fold line that forms the top of the free end side of the first three-dimensional gather 4a to form a two-ply sheet. A first three-dimensional gather 4a is formed by arranging a plurality of elastic members 41 extending in the longitudinal direction (Y direction) between two stacked sheets and fixing them with an adhesive.

  Further, as shown in FIG. 8, the two-layered sheets extend outward in the width direction (X direction), and are further folded in two along a fold line that forms the top of the free end side of the second three-dimensional gather 4b. First, a plurality of elastic members 41 extending in the vertical direction (Y direction) are arranged between the two stacked sheets constituting the four stacked sheets, and fixed with an adhesive. A two-dimensional gather 4b is formed. As shown in FIG. 8, the top sheet 31 is formed longer in the width direction (X direction) than the back sheet 32, and then outwards in the width direction (X direction) from both side edges 33 c and 33 c of the absorber 33. The extended portion is folded back to the back sheet 3 side of the absorber 33, and the leading end portion of the two-layered sheet described above is finally folded to the back sheet 3 side of the absorber 33 as shown in FIG. It is arranged between the top sheet 31 and the back sheet 32, and is joined and integrated in the vicinity of the third linear joint portion 6c formed at the position of the non-stacking portion 34 of the absorber 33. The first three-dimensional gather 4a formed in this way stands up in the width direction (X direction) inward (center line CL side) toward the wearer's skin side by contraction of the plurality of elastic members 41. Further, the second three-dimensional gather 4b formed in this manner is outward in the width direction (X direction) toward the wearer's skin side (on the opposite side to the center line CL) due to the contraction of the plurality of elastic members 41. Stand up. In addition, the position of the 3rd linear junction part 6c is a position near the centerline CL from the position of the non-stacking fiber part 34 of the absorber 33 or the position of the non-stacking fiber part 34 from a viewpoint of the standing property of a solid gather. It is preferable that

  The 3rd linear junction part 6c is extended along each both-sides edge part of the rectangular-shaped absorptive main body 3, and is extended over the full length of the vertical direction (Y direction) of the absorptive main body 3. FIG. The third linear joint portion 6c is preferably formed in a continuous linear shape, but may be formed in a dotted line shape. Moreover, as a joining method at the time of forming the 3rd linear junction part 6c, various well-known joining methods, such as a heat seal, an ultrasonic seal, a high frequency seal, and an adhesive agent, are used.

  The pant-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.

1A, 1B, 1C Pants-type disposable diaper 2A Abdominal sheet member 20A Abdominal sheet member body 200 Lower edge 20 of the abdominal sheet member body Side edge part 21A of the abdominal sheet member body 21A Abdominal side extension part 21a Abdominal side extension Side edge part 2B Back side sheet member 20B Back side sheet member body 200 Lower edge 20b of back side sheet member body Side edge part of back side sheet member body 21B Back side extension part 21b Side edge of back side extension part Part 22 Outer layer sheet 23 Inner layer sheet 24 Elastic member 3 Absorbent body 3a, 3b End part in the longitudinal direction (Y direction) of the absorbent body 3c Side part in the longitudinal direction (Y direction) of the absorbent body 31 Top sheet 32 Back sheet 33 Absorber 33c Absorber side edge 34 Non-stacked portion 34a Abdominal side end, 34b Back side end 35 High basis weight portion 36 Absorber elastic member 37 Central unstacked portion 4 Solid gather 4a First Three-dimensional gather, 4b Second three-dimensional gather 40 Three-dimensional gather forming sheet 41 Elastic member 42 Intermediate elastic member 41a First elastic member 42 Inner forming sheet 43 Outer forming sheet 5 Side seal part 6a First linear joint part, 6d Fourth line -Like joint, 6c Third linear joint 7 Adhesive A Abdominal side, B Dorsal side, C Crotch WO Waist opening, LO Leg opening CL Centerline extending in the longitudinal direction of the diaper, CT Center of the diaper

Claims (7)

A horizontally-long rectangular ventral sheet member disposed on the abdomen of the wearer, a horizontally-long rectangular dorsal sheet member disposed on the back of the wearer, the abdomen sheet member, and the dorsal sheet A pants-type absorbent article comprising an absorbent main body that is fixed over a member and three-dimensional gathers arranged on both sides of the absorbent main body,
The absorbent main body has a vertically long absorbent body, and the absorbent body has a pair of non-stacked fibers extending along the longitudinal direction;
Each of the pair of non-stacked fiber portions is a pants-type absorbent article straddling the belly side sheet member and the back side sheet member. The ventral sheet member has a ventral sheet member main body, and a ventral extension part that extends downward along the lower edge of the ventral sheet member main body when worn,
The dorsal sheet member has a dorsal sheet member main body and a dorsal extension portion extending downward along the lower edge of the dorsal sheet member main body when worn,
Each of a pair of said non-stacking fiber part has the longitudinal side ventral end part overlapped with the ventral side extension part, and the longitudinal back side end part has overlapped with the back side extension part. The pants-type absorbent article described in 1. Each of the ventral sheet member and the dorsal sheet member has a plurality of elastic members arranged in a state of being spaced apart in the vertical direction and extending in the width direction,
In the region where the ventral side end portion of the non-stacked fiber portion overlaps with the ventral side extending portion, and in the region where the back side end portion of the non-stacked fiber portion overlaps with the backside extended portion. The pants-type absorbent article according to claim 2, wherein the elastic member is not disposed.   The said abdominal extension part and the said back extension part each have the several elastic member distribute | arranged spaced apart to the vertical direction, and was distribute | arranged in the state extended in the width direction. Pants-type absorbent article.   The three-dimensional gather includes a first three-dimensional gather that extends inward in the width direction from a side portion of the absorbent main body and a second three-dimensional gather that extends outward in the width direction from the side portion of the absorbent main body. The underpants type absorbent article in any one of Claims 1-4.   The said absorbent body is an underpants type absorbent article in any one of Claims 1-5 which has the elastic member for absorbers distribute | arranged in the state extended | stretched to the vertical direction in each both-sides edge part.   The pants according to any one of claims 1 to 6, wherein the absorbent body has a high basis weight part, and the high basis weight part straddles the abdominal extension part and the back extension part. Mold absorbent article.

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