JP5366777B2 - Pants-type absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants-type absorbent article whose leg holes have such a large area that legs can be easily put in, whose inguinal region in the front part has a neat appearance and can prevent leakage from sides, whose rear part covers a wide range of the buttocks and which is comfortable to wear. <P>SOLUTION: A diaper 1A includes a ventral sheet member 2A, a dorsal sheet member 2B, an absorbent body 3 whose front and rear parts 3a and 3a in the longitudinal direction are fixed respectively, and three-dimensional gathers 4 on both sides 3b of the absorbent body 3. The diaper has side edges bonded to form a waist opening WO and leg openings LO. Each of the three-dimensional gathers 4 is fixed on the ventral sheet member 2A where it is laid inward in the width direction and is fixed on the dorsal sheet member 2B where it is laid outward in the width direction. Absorbent articles 33 of the absorbent body 3 have raised guides 35 which trigger rising between both sides 33b and a central part 33c. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

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

  As a conventional pants-type absorbent article, the outer envelope is divided into a ventral sheet member disposed on the wearer's belly side when worn and a back sheet member disposed on the wearer's back side when worn. The absorptive main body is fixed so as to span the abdominal seat member and the back seat member, and the left and right side edges of the abdominal seat member are joined to the left and right side edges of the back seat member. Known pant-type absorbent articles are known. For example, Patent Document 1 includes an annular elastic belt composed of a front belt portion and a rear belt portion and an absorbent main body, and the length of the rear belt portion (back seat member) in the longitudinal direction is set to the front belt portion ( A pull-on garment that is longer than the length in the longitudinal direction of the ventral sheet member is described.

Special table 2008-508082

  In such an underpants-type absorbent article described in Patent Document 1, the opening area of the pair of leg holes can be increased, and the wearer's foot can be easily put on when worn. However, Patent Document 1 does not describe in detail the fixation of three-dimensional gathers arranged on both sides of the absorbent main body and the shape of the absorbent body constituting the absorbent main body. In an absorbent article, it is difficult to make the appearance of the groin part of the front part (abdominal sheet member) clear, it is difficult to prevent side leakage, and the heel part of the rear part (back side sheet member) is wide. It is difficult to coat and improve comfort.

  Therefore, an object of the present invention is to increase the opening area of the pair of leg holes, and to make the groin portion have a clean appearance at the front portion (ventral side seat member), to prevent side leakage and to prevent the rear portion (back) In the side sheet member), it is intended to provide a pants-type absorbent material that covers the heel part in a wide range and is comfortable to wear.

  The present invention relates to a stretchable abdomen sheet member disposed on the abdomen side of the wearer when worn, a stretchable back sheet member disposed on the back side of the wearer when worn, a ventral sheet member and a back An absorbent main body having longitudinal side front and rear portions fixed to the side sheet member, and three-dimensional gathers on both sides in the longitudinal direction of the absorbent main body, the ventral sheet member and the back seat A pants-type absorbent article in which both side edges of each member are joined to form a waist opening and a pair of leg openings, and each of the three-dimensional gathers absorbs the absorption on the ventral sheet member. It is fixed in a state of being tilted to the inner side in the width direction of the absorbent main body, and on the back seat member, it is fixed in a state of being tilted to the outer side in the width direction of the absorbent main body, The absorbent body constituting the absorbent main body is long Provided is a pants-type absorbent article having a standing guide part that is an opportunity for each side part of the absorbent main body to stand up toward the wearer when worn between each side part of the direction and the central part. Is.

  According to the pant-type absorbent article of the present invention, the opening area of the pair of leg holes is large and it is easy to put in a foot, and the front part (ventral side sheet member) has a neat appearance at the groin, and side leakage is caused. In the rear part (back seat member), the heel part is covered in a wide range, and the comfort is good.

FIG. 1 is a perspective view of a pants-type disposable diaper according to the first embodiment of the present invention. FIG. 2 is a plan view of the pants-type disposable diaper shown in FIG. 1 as viewed from the top sheet side in an expanded state. 3A is a cross-sectional view taken along line X1-X1 in FIG. 2, FIG. 3B is a cross-sectional view taken along line X2-X2 in FIG. 2, and FIG. 3C is a cross-sectional view taken along line X3-X3 in FIG. It is sectional drawing in a natural state. FIG. 4 is a cross-sectional view taken along line X1-X1 of FIG. 2 in a pants-type disposable diaper that is the second embodiment of the present invention. FIG. 5 is a plan view of the absorbent body used in the pants-type disposable diaper according to the second embodiment of the present invention. 6 is a cross-sectional view taken along line X1-X1 of FIG. 2 in a pants-type disposable diaper that is the third embodiment of the present invention. FIG. 7: is a top view of the absorber used for the underpants type disposable diaper of 3rd Embodiment of this invention. FIG. 8 is a perspective view of a pants-type disposable diaper according to a fourth 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.

A pant-type disposable diaper 1A according to the first embodiment (hereinafter also referred to as “diaper 1A”) includes a stretchable abdominal sheet member 2A disposed on the abdomen side of the wearer when worn as shown in FIG. The longitudinal back and front portions 3a and 3a of the absorbent main body 3 are fixed to the stretchable back side sheet member 2B, the abdomen side sheet member 2A and the back side sheet member 2B which are disposed on the wearer's back side when worn. The absorbent main body 3 and the three-sided gathers 4 on each of the longitudinal side portions 3b and 3b of the absorbent main body 3, and the side edges 2a and 2a of the ventral seat member 2A and the back seat member 2B. The side edges 2b and 2b are joined to form a waist opening WO and a pair of leg openings LO and LO.
The diaper 1A is formed symmetrically with respect to the center line CL as shown in FIGS. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.

  The diaper 1A according to the first embodiment will be described in detail. The diaper 1A is in a longitudinal direction (hereinafter referred to as “Y direction”) when the diaper 1A is expanded and extended (see FIG. 2). Y direction: parallel to the center line CL. The abdominal side A disposed on the abdomen of the wearer, the back side B disposed on the back of the wearer, the abdomen A and the back B The crotch part C is located between the crotch parts of the wearer. The width direction of the diaper 1A is a direction orthogonal to the longitudinal direction (Y direction) (hereinafter referred to as “X direction”).

  The diaper 1 </ b> A includes a ventral sheet member 2 </ b> A on the ventral side A. The ventral sheet member 2A has a long rectangular shape in the diaper width direction (X direction) when the diaper 1A is expanded and extended (see FIG. 2), and a pair of left and right sides along the diaper longitudinal direction (Y direction) It has edges 2a, 2a.

  The diaper 1 </ b> A includes a back seat member 2 </ b> B on the back side B. The back-side sheet member 2B has a long rectangular shape in the diaper width direction (X direction) when the diaper 1A is expanded and extended (see FIG. 2), and a pair of left and right sides along the diaper longitudinal direction (Y direction) It has edges 2b and 2b.

  In the diaper 1A, as shown in FIG. 1, the side edges 2a, 2a of the abdominal sheet member 2A and the side edges 2b, 2b of the back sheet member 2B are joined to form side seal parts 5, 5. In addition, a waist opening WO and a pair of leg openings LO, LO are formed. For the joining of the side seal portions 5 and 5, for example, a heat seal, a high frequency seal, an ultrasonic seal, an adhesive, or the like is used.

In the diaper 1A, the entire regions of both side edges 2a, 2a of the ventral sheet member 2A and both side edges 2b, 2b of the back sheet member 2B are joined to form a pair of side seal parts 5, 5. As shown in FIG. 2, the length of each side seal portion 5 in the Y direction is the same as the length in the Y direction of the ventral sheet member 2A and the dorsal seat member 2B, but both sides of the ventral sheet member 2A. A part of the edge parts 2a, 2a and a part of the both side edge parts 2b, 2b of the back seat member 2B may be joined to form a pair of side seal parts 5, 5. That is, the length of each side seal portion 5 in the Y direction may be shorter than the length of the ventral seat member 2A or the back seat member 2B in the Y direction.
In the diaper 1A, the length in the Y direction of each side seal portion 5 is preferably 170 mm to 280 mm, and more preferably 215 mm to 265 mm, from the viewpoint of appearance.

  As the stretchable ventral sheet member 2A and the back sheet member 2B, a material that forms a gather by contraction of an elastic member disposed in an expanded state between the sheets, or exhibits a stretch property, or a substantially non-stretched state It is possible to use a material that exhibits stretchability by an elastic filament or the like that is fixed to a non-woven fabric that can be stretched. In the diaper 1 </ b> A, as shown in FIGS. 2 and 3, each of the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B includes an outer layer sheet 21 that forms the outer surface of the diaper, and an inner layer disposed on the inner surface side of the outer layer sheet 21. A sheet 22 and a plurality of thread-like elastic members 23 arranged in the X direction between the sheets 21 and 22 and being fixed with an adhesive between the sheets 21 and 22, It has a waist stretchable part G1 and a waistline stretchable part G2. In the diaper 1A, as shown in FIG. 2, the waist stretchable part G1 includes front and rear portions 3a, 3a 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. The waist extension / contraction part G2 is formed on the front and rear portions 3a and 3a 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.

  As shown in FIGS. 2 and 3, the absorbent main body 3 includes a liquid-permeable top sheet 31, a liquid-impermeable or water-repellent back sheet 32, and a liquid retaining property disposed between the sheets 31 and 32. 2 and is formed in a rectangular shape that is long in the Y direction, as shown in FIG. The absorbent body 33 is composed of an absorbent core (not shown) in which water-absorbing polymer particles are held in an aggregate of fibers such as pulp fibers, and a core wrap sheet (not shown) that covers the absorbent core. As shown in FIG. 2, each of the top sheet 31, the back sheet 32, and the absorber 33 has a rectangular shape that is long in the Y direction, and the top sheet 31 and the back sheet 32 are both ends of the absorber 33 in the Y direction. A rectangular absorbent main body 3 which is joined at the portions extending outward from each other and is long in the Y direction is formed.

  As shown in FIG. 2, the absorbent main body 3 is provided with three-dimensional gathers 4 along both side portions in the longitudinal direction (Y direction). Each three-dimensional gather 4 is arranged along the longitudinal direction (Y direction) on both side portions 3b and 3b in the longitudinal direction (Y direction) of the absorbent main body 3, and each three-dimensional gather 4 is shown in FIG. In the crotch part C at the time of wearing, it stands up toward the wearer's skin side.

  As shown in FIGS. 2 and 3, each three-dimensional gather 4 includes a liquid resistant or water-repellent sheet material 41 and an elastic member 42 for forming a three-dimensional gather fixed to the sheet material 41. . The sheet material 41 in the diaper 1 </ b> A is formed from a single belt-like sheet, and one end in the X direction of one sheet is disposed between the absorber 33 and the back sheet 32 of the absorbent main body 3. It is fixed at the joint 34. The other end portion (free end portion) in the X direction of one sheet extends outward in the X direction and is folded in two at a portion to be the free end portion 4a of the three-dimensional gather 4, thereby opposing sheets facing each other The elastic member 42 is fixed through an adhesive to form the three-dimensional gather 4.

  As shown in FIG. 2, the elastic members 42 forming the three-dimensional gathers 4 are arranged in a stretched state in parallel with the longitudinal direction (Y direction) of the absorbent main body 3. The joint 34 also extends along each side edge of the absorbent main body 5. Each three-dimensional gather 4 stands up toward the wearer's skin side, with the joint 34 as a fixed end in the crotch C when worn.

  The absorbent main body 3 is fixed on the inner layer sheet 22 of the abdominal sheet member 2A via an adhesive at a portion where one end side in the longitudinal direction (Y direction) overlaps with the abdominal sheet member 2A. The other end side is fixed on the inner layer sheet 22 of the back side sheet member 2B via an adhesive in a portion overlapping the back side sheet member 2B.

  As shown in FIGS. 2 and 3A, each three-dimensional gather 4 is fixed on the abdominal sheet member 2 </ b> A in a state where it is tilted to the inner side in the width direction (X direction) of the absorbent main body 3. As shown in FIGS. 2 and 3B, the back side seat member 2B is fixed in a state where it is tilted outward in the width direction (X direction) of the absorbent main body 3. Specifically, as shown in FIG. 2 and FIG. 3A, each three-dimensional gather 4 is inward in the width direction (X direction) of the absorbent main body 3 in the portion located on the ventral sheet member 2A. In the state where it is tilted to the side, it is fixed on the surface sheet 31 covering the skin contact surface side of the absorbent body 33 by the ventral side fixing portion 6a. As shown in FIGS. 2 and 3 (b), each three-dimensional gather 4 is in a state where it is tilted outward in the width direction (X direction) of the absorbent main body 3 at the portion located on the back seat member 2B. Thus, it is fixed on the inner layer sheet 22 of the back side sheet member 2B by the back side fixing part 6b. Thus, in the diaper 1A, the other end side in the longitudinal direction of the absorbent main body 3 is fixed to the inner layer sheet 22 with the adhesive on the back sheet member 2B, and each three-dimensional gather 4 is fixed to the back side. It is fixed to the inner layer sheet 22 via the part 6b.

  As shown in FIG. 2 and FIG. 3A, the absorbent body 33 constituting the absorbent main body 3 is worn between the side portions 33b and 33b in the longitudinal direction (Y direction) and the central portion 33c when worn. The both sides 3b of the absorptive main body 3 have an upright guide part 35 as an opportunity to stand up toward the person. In the diaper 1A of 1st Embodiment, as shown to FIG. 2, FIG. 3 (a), when each absorber is comprised including a pulp independent or a pulp and a water absorption polymer, as shown to FIG. 2, FIG. There is no space. As shown in FIG. 2, the space portions that are the standing guide portions 35 of the diaper 1 </ b> A are formed in a convex shape toward the center line CL and lack the pulp constituting the absorber. In the diaper 1A of the first embodiment, the space portions that are the standing guide portions 35 extend from the abdominal side portion A to the crotch portion C as shown in FIGS. 2, 3A, and 3C. However, it may be formed between both end portions 33a, 33a in the longitudinal direction (Y direction) of the absorber 33.

  In the diaper 1A of the first embodiment, as shown in FIG. 3A, the ventral fixed inner end 6a1 in fixing the three-dimensional gathers 4 on the ventral sheet member 2A is inward of the standing guide portions 35. As shown in FIG. 3B, the back side fixed outer end 6b1 in fixing the three-dimensional gathers 4 on the back side sheet member 2B is located outward of each standing guide portion 35. It is located outside the end 35b (see FIG. 3A). Specifically, as shown above, each three-dimensional gather 4 is fixed to the top sheet 31 via the ventral side fixing portion 6a on the ventral side sheet member 2A as shown in FIG. As shown in FIG. 3B, on the back sheet member 2B, it is fixed to the inner layer sheet 22 of the back sheet member 2B via a back fixing part 6b. Here, as shown in FIG. 3 (a), the ventral fixed inner end 6a1 means a portion located closest to the center line CL in the width direction (X direction) in the ventral fixed portion 6a. As shown in FIG. 3B, the side fixed outer end 6b1 means a portion located on the outermost side in the width direction (X direction) in the back side fixed portion 6b. Further, as shown in FIG. 3A, the inward end 35a of the standing guide part 35 means a part located closest to the center line CL in the width direction (X direction) in the standing guide part 35. The outer end 35 b of the guide portion 35 means a portion located on the outermost side in the width direction (X direction) in the standing guide portion 35. In the diaper 1A of the first embodiment, as shown in FIGS. 2, 3A, and 3B, the ventral fixed inner end 6a1 of the ventral fixed portion 6a The back-side fixed outer end 6b1 of the back-side fixing portion 6b is located on the inner side of the inner end 35a, and is formed on the outer side of the outer end 35b of each standing guide portion 35.

  As shown in FIG. 3C, the diaper 1 </ b> A formed as described above has an abdomen caused by each standing guide portion 35 as each solid gather 4 stands up toward the wearer when worn. Both side portions 3b, 3b of the absorbent main body 3 on the side sheet member 2A stand up. Specifically, as shown in FIGS. 3A and 3B, one end portion of the sheet material 41 forming each three-dimensional gather 4 is formed by the absorber 33 and the back sheet 32 of the absorbent main body 3. It is arranged in between and fixed at the joint 34. Further, as shown in FIG. 3A, each three-dimensional gather 4 is fixed on the abdominal sheet member 2A in a state of being tilted inward in the width direction (X direction). As shown in b), on the back seat member 2B, it is fixed in a state of being tilted outward in the width direction (X direction). Moreover, the absorber 33 which comprises the absorptive main body 3 is a wearer at the time of wear between the side parts 33b and 33b and the center part 33c of a longitudinal direction (Y direction), as shown to FIG. 2, FIG. It has the standing guidance | induction part 35 used as the opportunity to stand up. Therefore, when the wearer wears the diaper 1 </ b> A, each three-dimensional gather 4 is formed as each three-dimensional gather 4 stands up toward the wearer due to the contraction force of the elastic member 42 forming each three-dimensional gather 4. Since one end portion of the sheet material 41 is fixed at the joint portion 34, due to each standing guide portion 35, as shown in FIG. 3C, the absorbent main body 3 on the ventral sheet member 2 </ b> A Both side portions 3b, 3b of the absorptive main body 3 near the abdominal sheet member 2A at the side portions 3b, 3b and the crotch portion C stand up. The maximum leg circumference of the diaper 1A when worn is preferably 600 mm to 790 mm. Here, the maximum leg perimeter means the length of one leg opening LO along the wearer's leg, specifically, the ventral sheet that forms the leg opening LO when worn. The sum of the length of the edge on the crotch C side of the member 2A, the length of the free end 4a of the three-dimensional gather 4 of the crotch C, and the length of the edge on the crotch C side of the back seat member 2B is there.

The forming material of the pants-type disposable diaper 1A of the first embodiment will be described.
The outer layer sheet 21 and the inner layer sheet 22 constituting the abdominal sheet member 2A and the back sheet member 2B can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 21 and the inner layer sheet 22, a water-repellent nonwoven fabric or the like can be used.

  As the sheet material 41 that forms the top sheet 31, the back sheet 32, the absorber 33, and the three-dimensional gather 4 constituting the absorbent main body 3, respectively, as long as it is normally used for absorbent articles such as disposable diapers, It can be used without particular limitation. 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 absorbent body 33, an absorbent core made of absorbent polymer particles and a fiber material and covered with tissue paper can be used. As a sheet for forming the three-dimensional gather 4, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

  Examples of the elastic member 23 that forms the waist stretchable part G1 and the waistline stretchable part G2 and the elastic member 42 disposed in the three-dimensional gather 4 include natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, A thread-like stretchable material made of a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene can be used.

  The fixing means for the absorbent main body 3 and the abdominal sheet member 2A and the back sheet member 2B are usually adhesives used for absorbent articles such as disposable diapers, heat embossing, ultrasonic embossing, high frequency embossing, etc. A fusing means is used. As a fixing means for the three-dimensional gather 4 and the back sheet member 2B, an adhesive used for an absorbent article such as a disposable diaper, or a fusing means such as heat embossing, ultrasonic embossing, and high-frequency embossing is usually used. Similarly, fixing of the top sheet 31, the back sheet 32, and the sheet material 41 for forming a three-dimensional gather is usually fusion bonding of adhesives used for absorbent articles such as disposable diapers, heat embossing, ultrasonic embossing, high frequency embossing, etc. Means are used. For joining the side seal portions 5 and 5, for example, a heat seal, a high frequency seal, an ultrasonic seal, an adhesive, or the like is 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 the first embodiment, as shown in FIGS. 1 and 2, is a ventral sheet member 2A disposed on the wearer's belly side when worn, and a dorsal side disposed on the wearer's back side when worn. Since the outer layer sheet is a diaper divided into two, comprising a seat member 2B, and an absorbent main body 3 fixed over the central part of the ventral seat member 2A and the back seat member 2B, a pair of legs The opening area of the holes LO and LO is large and it is easy to put a foot. Further, in the diaper 1A of the first embodiment, each three-dimensional gather 4 is tilted inward in the width direction (X direction) of the absorbent main body 3 on the ventral sheet member 2A as shown in FIG. And fixed on the back seat member 2 </ b> B in a state of being tilted outward in the width direction (X direction) of the absorbent main body 3. Therefore, in the abdominal side part A, the groin part has a refreshing appearance, and in the back side part B, the heel part is covered in a wide range, and the comfort is good. In addition, as shown in FIG. 3C, the diaper 1A of the first embodiment is abdomen caused by each standing guide portion 35 as each three-dimensional gather 4 stands up toward the wearer when worn. Both side parts 3b, 3b of the absorbent main body 3 on the side sheet member 2A and both side parts 3b, 3b of the absorbent main body 3 near the abdominal sheet member 2A in the crotch part C stand up. Therefore, in the abdominal side A and the crotch C, the absorbent main body 3 is deformed so as to cover the wearer's urine drainage part, so that side leakage can be prevented.

  3A and 3B, the diaper 1A of the first embodiment is configured such that the abdominal side fixed inner end 6a1 of the abdominal side fixing portion 6a of the three-dimensional gather 4 is an absorber 33. The rear fixed outer end 6b1 of the back side fixing portion 6b of the three-dimensional gather 4 is located on the inner side of the inner end 35a of each standing guide portion 35, and the outer end 35b of each standing guide portion 35 of the absorber 33. It is formed on the outer side. Therefore, in the abdominal side A, the inguinal part is more likely to have a clean appearance, and the absorbent main body 3 is further easily deformed so as to cover the wearer's urination part, thereby further preventing side leakage. Can do. Moreover, in the back side part B, a heel part is easy to be covered in a wide range, and also comfort is good.

Next, the underpants type disposable diaper of 2nd Embodiment of this invention is demonstrated based on FIG. 4, 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 of the first embodiment, and the description of the pants-type disposable diaper 1A of the first embodiment is applied as appropriate.

  As shown in FIG. 4, the diaper 1B of the second embodiment is different from the diaper 1A of the first embodiment in which each standing guide part 35 is a space part, and each standing guide part 35 is formed of a low weight part. . That is, as shown in FIG. 4, each standing guide portion 35 of the diaper 1 </ b> B has a basis weight of pulp and / or water-absorbing polymer constituting the absorber 33, such that the center portion 33 c of the absorber 33 or both side portions 33 b of the absorber 33. , 33b is a lower basis weight than the basis weight of 33b.

As shown in FIG. 4, the absorbent body 33 of the diaper 1 </ b> B has a low weight portion that is a standing guide portion 35 between each of the side portions 33 b and 33 b in the longitudinal direction (Y direction) and the central portion 33 c. Yes. In the diaper 1 </ b> B of the second embodiment, the low weight portion that is each standing guide portion 35 is formed between both end portions 33 a and 33 a in the longitudinal direction (Y direction) of the absorber 33 along the center line CL. However, it may be formed only from the ventral side A to the crotch C. The length in the X direction of each standing guide portion 35 in the diaper 1B is preferably 5 mm to 30 mm, and the length in the X direction of each of the side portions 33b and 33b of the absorbent body 33 is 20 mm to 50 mm. Preferably, the length in the X direction of the central portion 33c of the absorber 33 is preferably 50 mm to 120 mm. Basis weight of the central portion 33c of the absorber 33 can adjust the pulp and water absorption polymer amount in the range to be applied to a conventional diaper by appropriately adjusting is preferably 100~1200g / m ^2. Further, the basis weight of each standing guide portion 35 in the diaper 1B is preferably lower than the central portion 33c and the both side portions 33b, but if it is 300 g / m ² or less, more preferably 100 g / m ² or less, a sufficiently satisfactory effect is obtained. Is obtained. In particular, if the basis weight of the pulp constituting the absorber of the standing guide part 35 is 100 g / m ² or less, more preferably 50 g / m ² or less, further effects can be obtained. Basis weight of the side portions 33b of the absorber 33 may be the same as the central ^{portion, 100g / m 2 ~600g / m} 2 from the viewpoint of the mounting discomfort. The basis weight is measured by the following method.

<Measurement method of basis weight>
First, the absorber 33 is cut into a size of 50 mm × 50 mm at the center portion 33c, both side portions 33b, and the low weighted portion which is the standing guide portion 35, and this is used as a measurement sample at each part. The measurement sample is placed on an electronic balance (regardless of manufacturer), the weight in this state is measured, and the weight (g / m ² ) is obtained by dividing the weight by the area.

  The formation material of the pants-type disposable diaper 1B of 2nd Embodiment is demonstrated. About the diaper 1B of 2nd Embodiment, it is the same as that of the formation material of the underpants type disposable diaper 1A of 1st 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, it is the same as that of the diaper 1A of 1st Embodiment, and description of the effect of the unfoldable disposable diaper 1A of 1st Embodiment is applied suitably.

Next, a pants-type disposable diaper according to a third embodiment of the present invention will be described with reference to FIGS.
About the pants type disposable diaper 1C of 3rd Embodiment (henceforth "diaper 1C"), a different point from pants type disposable diaper 1A, 1B of 1st, 2nd embodiment is demonstrated. The point which is not demonstrated in particular is the same as that of the pants-type disposable diapers 1A and 1B of the first and second embodiments, and the description of the pants-type disposable diapers 1A and 1B of the first and second embodiments is appropriately applied.

  As shown in FIG. 6, the diaper 1C of the third embodiment is a diaper 1A of the first embodiment in which each standing guide portion 35 is a space portion, and each standing guide portion 35 is formed of a low weight portion. Unlike the diaper 1 </ b> B of the embodiment, each standing guide portion 35 is formed by an embossed groove along the longitudinal direction (Y direction) of the absorber 33. That is, as shown in FIG. 6, each standing guide portion 35 of the diaper 1 </ b> C has an embossed groove formed by embossing between the central portion 33 c of the absorbent body 33 and both side portions 33 b and 33 b of the absorbent body 33. It is. As the embossing, fusion means such as heat embossing, ultrasonic embossing, and high-frequency embossing are used.

  As shown in FIG. 6, the absorbent body 33 of the diaper 1 </ b> B is an embossing that is an upright guiding portion 35 formed by embossing between each of the side portions 33 b and 33 b in the longitudinal direction (Y direction) and the central portion 33 c. Has a groove. In the diaper 1 </ b> C of the third embodiment, the embossed grooves that are the standing guide portions 35 are formed between both end portions 33 a and 33 a in the longitudinal direction (Y direction) of the absorbent body 33 along the center line CL. However, it may be formed only from the ventral side A to the crotch C. The length in the X direction of the embossed groove 35 in the diaper 1C is preferably 5 mm to 20 mm, and the length in the X direction of each of the side portions 33b and 33b of the absorber 33 is preferably 30 mm to 50 mm. The length in the X direction of the central portion 33c of the absorber 33 is preferably 50 mm to 120 mm.

  The forming material of the pants-type disposable diaper 1C of the third embodiment will be described. About the diaper 1C of 3rd Embodiment, it is the same as that of the formation material of 1 A of underpants type disposable diaper of 1st Embodiment.

The effect at the time of using the underpants type disposable diaper 1C of 3rd Embodiment of this invention mentioned above is demonstrated.
The effects of the diaper 1C of the third embodiment are the same as the effects of the diaper 1A of the first embodiment, and the description of the effects of the unfolded disposable diaper 1A of the first embodiment is applied as appropriate.

  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 above-described pants-type disposable diapers 1A, 1B, and 1C of the first, second, and third embodiments, as shown in FIG. 2 and FIG. Although it is fixed on the outer side in the width direction (X direction) of the absorbent main body 3 on the outer side of the absorbent body 3B, the back side fixed outer end 6b1 of the back side fixing part 6b of the three-dimensional gather 4 is As long as it is formed outside the outer end 35b of each standing guide portion 35 of the absorber 33, it does not have to be fixed in an expanded state. Moreover, you may improve the fitting property of a leg periphery part by setting it as the form (refer FIG. 8) which provides the leg gather part 7 outside the solid gathers 4. FIG.

  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 Ventral sheet member 2a Side edge 2B of ventral sheet member Backside sheet member 2b Side edge of dorsal sheet member 21 Outer layer sheet 22 Inner layer sheet 23 Elastic member 3 Absorbent body 3a Longitudinal (Y direction) front and rear portions of absorbent body 3b Longitudinal (Y direction) side part of absorbent body 31 Top sheet 32 Back sheet 33 Absorber 33a End part of absorbent body in longitudinal direction (Y direction) 33b Side part in the longitudinal direction (Y direction) of the absorbent body 33c Central part 331 Absorption core 332 Tissue paper 333 Elastic member 33a Central high rigidity part 33b Absorber side part 33c Central part 34 Joining part 35 Standing guide part 35a Standing guide part 35 b Inner end 35 b Outer end 4 of the standing guide portion 35 3D gather 41 Sheet material 42 Elastic member 5 for forming 3D gather Dorseal part 6a Abdomen side fixing part 6a1 Abdomen side fixing inner end 6b Back side fixing part 6b1 Back side fixing outer end 7 Leg gather part A Abdominal side part, B back side part, C Crotch part CL Extends in the longitudinal direction of the diaper Center line, WO waist opening, LO leg opening

Claims (2)

A stretchable abdominal sheet member disposed on the abdomen side of the wearer when worn, a stretchable back sheet member disposed on the back side of the wearer when worn, a ventral sheet member, and a back sheet member The front and back portions of the absorbent main body are fixed to each other, and three-dimensional gathers are provided on both side portions of the absorbent main body in the longitudinal direction, and both sides of the ventral seat member and the back seat member are provided. A pants-type absorbent article in which an edge is joined and a waist opening and a pair of leg openings are formed,
Each of the three-dimensional gathers is fixed on the ventral sheet member in a state of being tilted inward in the width direction of the absorbent main body, and on the back sheet member, the absorbent main body It is fixed in a state where it is tilted outward in the width direction,
The absorbent body that constitutes the absorbent main body is provided with a standing guide part that is an opportunity for each side part of the absorbent main body to stand up toward the wearer at the time of wearing, between each side part and the central part in the longitudinal direction. has,
An abdomen-fixed inner end of each of the three-dimensional gathers on the ventral sheet member is positioned on an inner side than an inner end of each of the standing guide portions, and each of the three-dimensional gathers on the back-side sheet member The pants-type absorbent article in which the back-side fixed outer end of the fixing is positioned outside the outer end of each of the standing guide portions .   Each of the standing guide portions constitutes an embossed groove along the longitudinal direction of the absorber, a low basis weight portion where the basis weight of the absorber is lower than that of the central portion or both side portions of the absorber, or the absorber. The pants-type absorbent article according to claim 1, wherein the article is a space without pulp.

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