JP5352427B2 - Pants-type absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underpants type absorbent article which enables a wearer to easily move legs, hardly causes leakage from his/her abdominal side, and is excellent in appearance when viewing from his/her back and side parts, though it is the underpants type absorbent article where the outer package material is divided into an abdominal side sheet member and a back side sheet member. <P>SOLUTION: The underpants type absorbent article 1 includes: the abdominal side sheet member 2A, the back side sheet member 2B; an absorbent body 3; and side seal parts 4, 4. The absorbent body 3 includes first stereoscopic gathers 38 and second stereoscopic gathers 34 formed on the outer side of the first gathers, which are arranged on the both side parts in the longitudinal direction, respectively. The first stereoscopic gathers 38 are fixed onto the abdominal side sheet member 2A and the back side sheet member 2B so as to be inclined inward in the width direction of the body 3. The second stereoscopic gathers 34 are fixed onto the abdominal side sheet member 2A in a state of being laid inward in the width direction of the body 3 and also fixed onto the end edges of the back side sheet member 2B on a crotch side in a state of being laid outward in the width direction of the body 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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 pants-type absorbent articles (see Patent Documents 1 and 2).
In the disposable diaper described in Patent Document 1, the side gathers provided on the side of the absorbent main body are fixed on the ventral sheet member in a state of being tilted inward in the width direction. On the back seat member, it is fixed in a state of being tilted inward in the width direction.
The pull-on garment described in Patent Document 2 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 vertical direction is set to the front belt. It is longer than the length in the vertical direction of the portion (ventral side sheet member).

International Publication No. WO2004 / 054490 Special table 2008-508082

  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 It is possible to eliminate the trim of the trim and to reduce the size of the trim to be removed, but many of them have a look like a loincloth when worn. Many consumers do not like that appearance because they are connected. On the other hand, if the width of the absorbent main body is increased, such problems are alleviated, but the absorbent main body strongly hits the leg on the front side of the wearer where the width between the left and right thighs is relatively narrow. This causes inconveniences such as difficulty in moving the legs.

The pants-type absorbent article of Patent Document 1 is fixed in a state where the side gather portion is tilted inward in the width direction on the abdominal side sheet member, and on the back side sheet member in the width direction. Although it is fixed in a state where it is tilted inward, the covering property on the back side and the ease of movement of the leg may be improved to some extent, but the width of the absorbent main body on the ventral seat member By narrowing, there exists a possibility that it may become easy to produce a leak from a wearer's belly side.
In the pull-on garment of Patent Document 2, the longitudinal length of the rear belt portion (back side seat member) is longer than the length of the front belt portion (abdominal side seat member), so that the wearability of the wearer's buttocks is increased. Has been enhanced. However, the width of the absorbent body is reduced by being pushed by the thighs from both sides, but there is a limit to the extent to which the rear belt part can be extended. There is a problem that the appearance seen from the back side or side of the wearer is unfavorable, such as giving a impression that the wearer's buttocks partly protrudes from the side edge portion, is unsatisfactory in appearance, and easily leaks. .

  Therefore, the present invention is a pant-type absorbent article in which the outer packaging material is divided into a stomach side sheet member disposed on the wearer's stomach side and a back side sheet member disposed on the wearer's back side. However, the present invention relates to a pants-type absorbent article that is easy to move, is less likely to leak from the wearer's stomach side, and is excellent in appearance as viewed from the wearer's back and sides.

  The present invention is fixed over the abdominal sheet member disposed on the abdomen side of the wearer, the dorsal sheet member disposed on the dorsal side of the wearer, and the abdomen sheet member and the dorsal sheet member. A pant comprising a pair of side seal portions formed by joining a ventral sheet member and a dorsal sheet member to both side edges of the ventral sheet member and the dorsal sheet member. 1st three-dimensional gather which is a type | mold absorbent article, and is formed in the outer side of the width direction of an absorptive main body rather than this 1st three-dimensional gather in each both sides of the longitudinal direction of the said absorbent main body The first three-dimensional gather is fixed in a state where the first three-dimensional gather is tilted inward in the width direction of the absorbent main body on each of the abdominal sheet member and the back sheet member. Three-dimensional gathering absorbs on the ventral sheet member It is fixed in the state where it is tilted to the inner side in the width direction of the body, and is fixed in the state that it is tilted to the outer side in the width direction of the absorbent main body on the edge part on the crotch part side of the back seat member An underpants-type absorbent article is provided.

  The pant-type absorbent article of the present invention is a pant type in which the outer packaging material is divided into a ventral sheet member disposed on the wearer's ventral side and a dorsal sheet member disposed on the wearer's dorsal side. Although it is an absorbent article, the leg is easy to move, leakage from the wearer's belly side is less likely to occur, and the appearance seen from the wearer's back or side is also excellent.

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 partially broken plan view showing a developed and extended state of the pants-type disposable diaper shown in FIG. 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. 3 is an enlarged sectional view taken along line III-III in FIG. 2 in a natural state. 4 is an enlarged sectional view taken along line IV-IV in FIG. 5 is an enlarged cross-sectional view taken along line VV in FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. FIG. 7: is a figure (FIG. 3 equivalent figure) which shows the cross section of the crotch part of the underpants type disposable diaper of 2nd Embodiment of this invention. FIG. 8: is a figure (FIG. 3 equivalent figure) which shows the cross section of the crotch part of the underpants type disposable diaper of 3rd Embodiment of this invention.

Hereinafter, the underpants type absorbent article of the present invention will be described based on preferred embodiments with reference to the drawings.
A pants-type disposable diaper 1 (hereinafter also referred to as diaper 1) according to the first embodiment of the present invention, as shown in FIG. 1 and FIG. 2, is an abdominal sheet member 2A disposed on the stomach side of the wearer, A back side sheet member 2B disposed on the back side of the wearer, and a vertically long absorbent main body 3 that is fixed over the abdomen side sheet member 2A and the back side sheet member 2B. A pants-type disposable having side seal portions 4 and 4 formed by joining the abdominal sheet member 2A and the back sheet member 2B to both side edges 2a, 2a, 2b and 2b of the back sheet member 2B. Diaper 1

  In the ventral sheet member 2A, the length La in the longitudinal direction (X direction) of the diaper (absorbent article) is longer than the length L4 in the same direction of the side seal portion 4 and below the side seal portion 4 (when worn) It has a ventral side extension 21a extending downward). Further, the back sheet member 2B has a length Lb in the longitudinal direction (X direction) of the diaper (absorbent article) longer than the length L4 in the same direction of the side seal portion 4, and is lower than the side seal portion 4 (wearing) It has the back side extension part 21b extended in the downward direction at the time. Hereinafter, in the ventral sheet member 2A, the portions having the side seal portions 4 and 4 on both side edges (portions other than the ventral extension portion 21a) are the both side edges in the ventral sheet member main body 20a and the dorsal sheet member 2B. The part having the side seal parts 4 and 4 at the part (the part other than the back extension part 21b) is also referred to as a back side sheet member main body 20b.

  The diaper 1 will be described in more detail. As shown in FIGS. 1 and 2, the diaper 1 is disposed on the abdomen side A disposed on the abdomen side of the wearer and on the back side of the wearer when worn. And a crotch part C which is located between the ventral part A and the dorsal part B and is arranged in the crotch part of the wearer. The longitudinal direction of the diaper (absorbent article) 1 is the direction from the abdominal side A to the back side B through the crotch C, or the opposite direction (X direction in FIG. 2), and the diaper (absorbent article) 1 The horizontal direction is a direction orthogonal to the vertical direction of the diaper (Y direction in FIG. 2).

  As shown in FIG. 3, the absorbent main body 3 of the diaper 1 includes a liquid-permeable top sheet 31, a liquid-impermeable or water-repellent back sheet 32, and a liquid holding member disposed between both sheets 31 and 32. As shown in FIG. 2, it is formed in a rectangular shape that is long in the same direction (X direction) as the diaper longitudinal direction. The absorbent body 33 is an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core 33a in which water-absorbing polymer particles are held, and a core wrap that covers the absorbent core 33a. It consists of sheets 33b and 33c. The absorber 33 is also formed in a rectangular shape that is long in the X direction.

As shown in FIG. 3, the absorbent main body 3 includes a first three-dimensional gather 38 and a second three-dimensional gather 38 that is formed on the outer side in the width direction of the absorbent main body with respect to the first three-dimensional gather 38. And a three-dimensional gather 34. The first three-dimensional gather 38 and the second three-dimensional gather 34 are arranged along the longitudinal direction of the absorbent main body 3.
The first three-dimensional gather 38 forms a three-dimensional gather 38 that stands up toward the wearer's skin at least in the crotch C, and the second three-dimensional gather 34 absorbs more than the three-dimensional gather 38 in at least the crotch C. A three-dimensional gather 34 that stands up toward the wearer's skin side in the widthwise direction of the main body 3 is formed. The three-dimensional gathers 38 and 34 that stand up toward the wearer's skin may be formed in the natural state and / or wearing state of the diaper 1.

The first three-dimensional gather 38 includes a liquid-resistant or water-repellent sheet material 35 and an elastic member 39 for forming a first three-dimensional gather fixed to the sheet material 35. The sheet material 35 in the diaper 1 of the present embodiment has a two-layer structure in which one sheet is folded in two along a bent portion disposed on the end portion 38 a on the free end side of the first three-dimensional gather 38. The elastic member 39 is fixed via an adhesive between the layers of the laminated sheet. Further, the laminated sheet is further folded in two along a bent portion disposed on the end portion 34a on the free end side of the second three-dimensional gather 34, whereby an elastic member is provided between the two laminated sheets facing each other. 36 is fixed via an adhesive. Further, the laminated sheets have a surface sheet 31 interposed between them in a linear joint portion 30 formed in the vicinity of the side edge portion of the absorbent body 33, more specifically, at a slightly outside position of the side edge portion. In this state, they are joined and integrated. As shown in FIG. 2, the linear joint portion 30 extends along both side edges of the rectangular absorbent body 4, and extends over the entire length of the absorbent body 33 and the absorbent main body 3 in the X direction. It extends. The first three-dimensional gather 38 in the crotch part C stands up toward the wearer's skin side with the inner edge of the linear joint 30 as a fixed end 38b.
The linear joint portion 30 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 linear joining part 30, various well-known joining methods, such as a heat seal, an ultrasonic seal, a high frequency seal, and an adhesive agent, are used.

As shown in FIG. 2, the second three-dimensional gather 34 exists over the entire length of the absorber 33 and the absorbent main body 3. As shown in FIG. 3, the second three-dimensional gather 34 includes a sheet material 35 and elastic members 36 and 36 for forming a second three-dimensional gather fixed to the sheet material 35. The second three-dimensional gather 34 in the crotch part C stands up toward the wearer's skin with the outer edge of the linear joint 30 as a fixed end 34b.
The elastic member 36 is preferably fixed to the sheet material 35 continuously in the longitudinal direction of the absorbent main body 3, but is intermittently fixed to the sheet material 35 as long as the object of the present invention can be achieved. May be.

The ventral sheet member 2A has a horizontally long rectangular shape when the diaper 1 is deployed and extended (see FIG. 2), and a pair of left and right side edges 2a, 2a along the diaper longitudinal direction (X direction); It has a pair of upper and lower end edges 2c and 2d along the diaper lateral direction (Y direction). Similarly, the back side seat member 2B has a horizontally long rectangular shape, a pair of left and right side edges 2b and 2b along the diaper longitudinal direction (X direction), and a pair of upper and lower sides along the diaper lateral direction (Y direction). End edges 2c and 2d. 2A and 2B, the length of the diaper longitudinal direction (X direction) is uniform in the diaper lateral direction (Y direction).
Then, a part 2a ′ of the side edge part 2a of the ventral sheet member 2A and a part 2b ′ of the side edge part 2b of the back side sheet member 2B are joined, so that the diaper 1 has a side seal. Portions 4 and 4, a waist opening 5 and a pair of leg openings 6 and 6 are formed. For this joining, for example, a heat seal, a high frequency seal, an ultrasonic seal, an adhesive, or the like is used.
In the diaper 1, the abdominal extension part 21a extends with substantially the same width over the entire area between both side edges 2a, 2a of the abdominal sheet member 2A, and the back extension part 21b also has a back side. The sheet member 2B extends with substantially the same width over the entire area between both side edges 2b, 2b.
FIG. 1 shows a state where the infant's trunk 7a is inserted into the waist opening 5 and the infant's legs 7b and 7b are inserted into the leg openings 6 and 6.

  As shown in FIGS. 4 and 5, the ventral sheet member 2 </ b> A and the back sheet member 2 </ b> B in the diaper 1 are both an outer layer sheet 22 that forms the outer surface of the diaper, and an inner layer sheet that is disposed on the inner surface side of the outer layer sheet 22. 23 and a plurality of thread-like elastic members 24 that are spaced apart from each other in the X direction between the two sheets 22 and 23, respectively, as shown in FIG. It has G2 and the extension part expansion-contraction part G3.

  As shown in FIG. 2, the ventral sheet member 2 </ b> A and the back sheet member 2 </ b> B exhibit elastic elasticity due to contraction of the elastic member 24 arranged in an extended state between the two sheets 22 and 23, as shown in FIG. 2. In a state where the elastic member 24 is extended, the pair of side edge portions 2a and 2a and the pair of side edge portions 2b and 2b are preferably parallel to each other. Further, the abdominal sheet member 2A and the back sheet member 2B are preferably in a horizontally long rectangular shape with the elastic member 24 extended.

  The waist stretchable part G1 is formed outward from the longitudinal ends 3a, 3b of the absorbent main body 3 in the longitudinal direction (X direction) of the diaper 1 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 (X direction) of the diaper 1 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 waist stretchable part G1, the waistline stretchable part G2, and the extended part stretchable part G3 are stretchable at least in the lateral direction (Y direction) of the diaper 1 at a portion located outward from both side edges of the absorbent body 33. Is preferably expressed.
In FIG. 1 to FIG. 6, the elastic members 24 forming the waist stretchable part G1, the waistline stretchable part G2, and the extending part stretchable part G3 cross the absorbent body 33, and the ventral seat member 2A and the back seat member Although the embodiment extending over the entire width of 2B has been shown, the elastic member 24 forming the waistline stretchable part G2 and / or the extended part stretchable part G3 is in a portion overlapping the central portion in the width direction of the absorber 33. The elastic member 24 does not impart elasticity to the abdominal sheet member 2A and the dorsal sheet member 2B in the portion by losing the elasticity of the elastic member by heat treatment or cutting the elastic member. It is preferable.

  The two sheets 22 and 23 constituting the abdominal sheet member 2A and the back sheet member 2B may be fixed with an adhesive in substantially the entire area of each of the abdominal sheet member 2A and the back sheet member 2B. It is good, and it is joined at a large number of joints formed in a dotted shape so as not to pass through the elastic member 24, as between two sheet materials in the elastic stretchable member described in JP-A-2005-80859. May be.

  The absorbent main body 3 has one end side in the longitudinal direction (a portion overlapping the ventral sheet member 2A) fixed to the center of the ventral sheet member 2A in the Y direction via an adhesive 8, and the other side in the longitudinal direction. The end side (portion overlapping with the backside exterior body 2B) is fixed to the central portion in the Y direction of the backside sheet member 2B via an adhesive 8.

As shown in FIGS. 2, 4 and 5, the first three-dimensional gather 38 in the diaper 1 of the present embodiment has a width of the absorbent main body 3 on each of the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B. It is fixed in a state where it is tilted inward in the direction (Y direction).
More specifically, as shown in FIG. 4, the first three-dimensional gather 38 is in a state where the first three-dimensional gather 38 is tilted to the inner side in the width direction of the absorbent main body 3 in the portion located on the ventral sheet member 2A. On the surface sheet 31 covering the skin contact surface side of the absorbent body 33, it is fixed by a known joining means 81 such as an adhesive. The first three-dimensional gather 38 is not only on the end edge 2c on the crotch part C side of the abdominal extension part 21a shown in FIG. 4, but also on the entire region on the abdominal extension part 21a, and further on the abdominal sheet member body. Also on 20a, it is fixed on the top sheet 31 in the same manner. That is, as shown in FIG. 2, the first three-dimensional gather 38 is fixed in the same state over the entire region located on the ventral sheet member 2A. Further, the elastic member 39 forming the first three-dimensional gather 38 extends in parallel with the longitudinal direction (X direction) of the diaper 1 and the absorbent main body 3 in the entire region located on the ventral sheet member 2A.

  Further, as shown in FIG. 5, the first three-dimensional gather 38 is also in a state where the first three-dimensional gather 38 is tilted to the inner side in the width direction of the absorbent main body 3 in the portion located on the back side seat member 2B. On the surface sheet 31 covering the contact surface side, it is fixed by a known joining means 81 such as an adhesive. The first three-dimensional gather 38 is not only on the end edge portion 2c on the crotch C side of the back extension portion 21b shown in FIG. 5, but also on the entire area on the back extension portion 21b, and further on the back seat member body. Also on 20b, it is fixed on the top sheet 31 in the same manner. That is, as shown in FIG. 2, the first three-dimensional gathers 38 are fixed in the same state over the entire area located on the back seat member 2B. Further, the elastic member 39 forming the first three-dimensional gather 38 extends in parallel with the longitudinal direction (X direction) of the diaper 1 and the absorbent main body 3 in the entire region located on the back sheet member 2B.

On the other hand, the second three-dimensional gather 34 in the diaper 1 of the present embodiment is on the inner side in the width direction of the absorbent main body 3 on the abdominal sheet member 2A, as shown in FIGS. It is fixed in a state of being tilted, and is fixed in a state of being tilted outward in the width direction of the absorbent main body 3 on the back side seat member 2B.
More specifically, in the portion located on the ventral sheet member 2A, as shown in FIG. 4, the second three-dimensional gather 34 is in a state where it is tilted to the inner side in the width direction of the absorbent main body 3, It is fixed on the first three-dimensional gather 38 described above by a known joining means 82 such as an adhesive. The second three-dimensional gather 34 is not only on the end edge 2c on the crotch part C side of the abdominal extension part 21a shown in FIG. 4, but also on the entire region on the abdominal extension part 21a, and further on the abdominal sheet member body. Also on 20a, it is fixed on the first three-dimensional gather 38 fixed on the top sheet 31 in the same manner. That is, as shown in FIG. 2, the second three-dimensional gather 34 is fixed in the same state over the entire region located on the ventral sheet member 2 </ b> A. The elastic member 36 forming the second three-dimensional gather 34 extends in parallel with the longitudinal direction (X direction) of the diaper 1 and the absorbent main body 3 in the entire region located on the ventral sheet member 2A.

  Further, as shown in FIG. 5, the second three-dimensional gather 34 is in a state where it is tilted outward in the width direction of the absorbent main body 3 in the portion located on the back side sheet member 2 </ b> B. On the inner layer sheet 23 that forms the skin facing surface, it is fixed by a known joining means 83 such as an adhesive. The second three-dimensional gather 34 is not only on the end edge 2c on the crotch C side of the back extension part 21b shown in FIG. 5, but also on the entire area on the back extension part 21b, and further on the back seat member body. Also on 20b, it is fixed on the top sheet 31 in the same manner (see FIG. 6). That is, as shown in FIG. 2, the second three-dimensional gather 34 is fixed in the same state over the entire region located on the back seat member 2 </ b> B, and forms the second three-dimensional gather 34. 36 extends in parallel with the longitudinal direction (X direction) of the diaper 1 and the absorbent main body 3 in the entire region located on the back sheet member 2B.

  In addition, the width direction center part 3c which has the absorber 33 in the absorptive main body 3 is each on the abdominal sheet member main body 20a, the abdominal side extension part 21a, the back side sheet member main body 20b, and the back side extension part 21b. On the other hand, being fixed with an adhesive or the like prevents floating of the abdominal sheet member 2A and the back sheet member 2B from the absorbent main body 3, and improves the appearance completeness of the product, and by bonding It is preferable from the viewpoint of improving rigidity, maintaining the width of the absorbent core and preventing leakage.

  In the diaper 1 of the present embodiment, the elastic member 39 that forms the first three-dimensional gather 38 and the elastic member 36 that forms the second three-dimensional gather 34 are both from the crotch C to the ventral sheet member body 20a. It extends over the crotch C side end edge 2d of the abdominal extension part 21a and develops stretchability from the abdominal sheet member body 20a. The elastic member 39 that forms the first three-dimensional gather 38 and the elastic member 36 that forms the second three-dimensional gather 34 both extend from the crotch C to the back side seat member main body 20b. Stretching is exhibited from the end edge 2d on the crotch C side of the side extension 21b to the back seat member body 20b. In addition, when there exists a part (part which does not have a function which contracts the sheet material 35) which is not fixed to the sheet material 35 in one end or both ends of the elastic members 36 and 39, the said part is a three-dimensional gather. Is not included in a part of the elastic members 36 and 39 forming the.

In the diaper 1 of the present embodiment, the second three-dimensional gather 34 is fixed on the end edge 2c on the crotch C side of the back side seat member 2B in a state where the second three-dimensional gather 34 is tilted outward in the width direction of the absorbent main body 3. Therefore, the second three-dimensional gather 34 is prevented from being bent so as to bite into the wearer's buttocks in the vicinity of the back seat member 2B, and the second three-dimensional gather 34 is in the vicinity of the back seat member 2B. Covering the wearer's buttocks with the diaper laterally expanded. Therefore, at the time of wearing, it can prevent effectively that a wearer's buttocks will be in the state exposed so that it may protrude to the side of an absorptive main part.
On the other hand, since the second three-dimensional gather 34 is fixed on the abdominal sheet member 2A in a state of being tilted inward in the width direction of the absorbent main body 3, in the vicinity of the abdominal sheet member 2A, The thigh is also prevented from strongly hitting the absorbent main body 3, and the wearer does not have difficulty moving the leg. In addition, the appearance seen from the front side is also a clean impression.
Further, on the abdominal sheet member 2A side compared to the back sheet member 2B side, the first three-dimensional gather 38 is fixed by being tilted inward in the width direction even though the width of the absorbent main body 3 is narrowed. Therefore, there is no risk of leakage from the portion near the ventral sheet member 2A.

  Moreover, in the diaper 1 of this embodiment, since the back side sheet member 2B has the back side extension part 21b, the both side edge parts of the abdominal side sheet member 2A and the both side edge parts of the back side sheet member 2B are vertically arranged in the diaper. Compared with the conventional diaper joined in the whole direction, the lower edge part 2c of the back | dorsal sheet | seat member 2B is located below a wearer at the time of wear. Therefore, the coverage of the heel portion is further improved.

  Moreover, in the diaper 1 of the present embodiment, as described above, the elastic member 36 forming the second three-dimensional gather 34 is a portion located on the abdominal seat member 2A and a portion located on the back seat member 2B. In each whole area, it extends in parallel with the longitudinal direction (X direction) of the absorbent main body 3, and is fixed at the end of the extending portion. Therefore, it is possible to effectively support the crotch portion whose weight has increased due to urination or the like. That is, the side gathers can support the crotch part in conjunction with the extension part.

  Further, in the diaper 1 of the present embodiment, the first three-dimensional gathers 38 are located on the ventral sheet member 2A and on the dorsal sheet member 2B, particularly on the ventral sheet member main body 20a and the back. On the side sheet member main body 20b, it is fixed on the top sheet 31 so as not to stand up. Therefore, the fit of the ventral sheet member 2A and the back sheet member 2B to the skin is good, and the wearing feeling and the appearance completeness are improved.

  Further, in the diaper 1 of the present embodiment, the elastic member 36 forming the second three-dimensional gather 34 extends over the back side sheet member main body 20b and the back side extension part 21b, and expresses elasticity in each. To do. Therefore, even when the diaper 1 is somewhat smaller than the wearer, the diaper 1 fits the wearer well.

  Further, in the diaper 1 of the present embodiment, each of the second three-dimensional gathers 34 is provided with a plurality of elastic members 36 forming the second three-dimensional gathers, and the total of the plurality of elastic members 36.36. As shown in FIG. 3, the second three-dimensional gather 34 is arranged closer to the free end 34 a than the center position 34 d in the width direction. The center position 34d of the second three-dimensional gather 34 is a position that bisects the distance from the fixed end 34b to the free end 34a of the second three-dimensional gather 34 in the unfolded and extended state of the diaper 1.

The width (distance in the Y direction in the state shown in FIG. 2) from the fixed end 34b to the free end 34a of the second three-dimensional gather 34 is preferably 10 to 40 mm, particularly 20 to 40 mm.
The second three-dimensional gather 34 in the crotch part C stands up toward the wearer's skin with the outer edge of the linear joint 30 as the fixed end 34b, but the elastic member 36 is disposed near the fixed end 34b. By not being arranged, that is, being arranged on the free end side of the second three-dimensional gather 34, the second three-dimensional gather 34 stands up well and easily comes into contact with the wearer's skin. When the second three-dimensional gather 34 abuts against the skin, the excrement that has leaked beyond the first three-dimensional gather 38 can be prevented from flowing out to the outside of the diaper, and the gap between the diaper and the legs around the crotch Can be eliminated, and there is a merit that the mother's anxiety about mole can be eliminated. Moreover, it is preferable that there are a plurality of elastic members 36, whereby the second solid gathers 34 come into contact with the wearer's skin (buttocks) on the surface, so that the above-described effects are more remarkably exhibited. become. In addition, the pressure of the side gathers can be supported by the surface to prevent the rubber thread from being traced.

In the diaper 1 of the present embodiment, as shown in FIG. 3, the elastic member 36 forming the second three-dimensional gather 34 is not disposed on the free end 34 a of the second three-dimensional gather 34. That is, the elastic member 36 closest to the free end 34a is also disposed with a predetermined interval W between the free end 34a. As a result, the inner side of the free end 34a of the second three-dimensional gather 34 is in contact with the skin and the free end 34a is in a frilled shape, so that it is difficult for gaps to occur around the legs even if diaper displacement occurs due to urination or the like. Further, since there is no hard portion at the end of the second three-dimensional gather 34, it is possible to prevent a sense of incongruity during wearing.
The interval W is preferably 2 to 20 mm, particularly 3 to 15 mm. In addition, when the sheet | seat material is return | folded in the site | part in which the elastic member was distribute | arranged, and the return part forms the free end 34a, the said elastic member shall be distribute | arranged to the free end 34a.

In the diaper 1 of the present embodiment, the ventral sheet member 2A is also formed with the ventral extension part 21a, so that when the diaper 1 is viewed from the ventral part A side, it looks like a loincloth. Appearance is good.
Moreover, since the extension part expansion-contraction part G3 formed in the abdominal extension part 21a and the back extension part 21b contracts moderately by the elastic member 24 distribute | arranged to each, when wearing the diaper 1, As shown in FIG. 1 (b), the side edge portion 2a existing in the ventral side extension portion 21a of the side seat member 2A and the side edge portion 2b existing in the back side extension portion 21b of the back side seat member 2B It is divided into a side part direction and a dorsal part 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, the ventral sheet member 2A is also formed with a ventral extension portion 21a, and the ventral extension portion 21a is formed with an extending / contracting portion G3 extending / contracting in the diaper lateral direction. When the extending portion 21a comes into contact so as to cover the buttocks and urination is performed, the increased weight is transferred to the abdominal side extending portion 21a and the abdominal side sheet member main body 20a and the back side sheet member main body 20b thereon. The rubber seals are less likely to stick around the legs due to the dispersion of pressure.

  In the diaper 1 of the present embodiment, the outer layer sheet 22 and the inner layer sheet 23 have extended folded portions 22a and 23a that are folded back toward the inner layer sheet 23 at the edge 2d that forms the opening peripheral edge of the waist opening. In the side seal portion 4, the extended folded portions 22a and 23a are joined to the portions of the outer layer sheet 22 and the inner layer sheet 23 that are not folded, and the portions that overlap the longitudinal direction of the absorbent main body 3 are It is joined to the surface of the absorbent main body 3 on the surface sheet 31 side by an adhesive.

  The extension length L5 of the ventral side extension part 21a of the ventral sheet member 2A is preferably 5 to 50%, particularly 10 to 40% of the length La of the ventral sheet member 2A. The extending length L6 of the 2B extending portion 21b is preferably 10 to 50%, particularly preferably 20 to 40%, of the length Lb of the back sheet member 2B. In the case of a diaper for infants, the extension lengths L5 and L6 of the abdominal and dorsal extension portions 21a and 21b are preferably 10 to 70 mm, more preferably 20 to 60 mm. In the case of an adult diaper, the extension lengths L5 and L6 of the abdominal and dorsal extension portions 21a and 21b are preferably 15 to 110 mm, more preferably 30 to 90.

  Moreover, the width | variety of the absorptive main body 3 in a Y direction is 35 to 65% of the width | variety of the Y direction of the state shown in FIG. It is preferably ˜60%.

Moreover, the length (the distance between the fixed end 38b and the free end 38a, measured in the state shown in FIG. 2) in the width direction (Y direction) of the absorbent main body 3 of the first three-dimensional gather 38 is 20 to 40 mm. In particular, it is preferably 20 to 30 mm, and the ratio to the width of the absorbent main body 3 is preferably 10 to 20%, particularly preferably 10 to 15%.
Moreover, the length (the distance between the fixed end 34b and the free end 34a, measured in the state shown in FIG. 2) in the width direction (Y direction) of the absorbent main body 3 of the second three-dimensional gather 34 is 20 to 40 mm. In particular, it is preferably 20 to 30 mm, and the ratio to the width of the absorbent main body 3 is preferably 10 to 20%, particularly preferably 10 to 15%.

  As the outer layer sheet 22 and the inner layer sheet 23, various sheet materials conventionally used for this type of article can be used without particular limitation, but is preferably a non-woven fabric, particularly from the viewpoint of flexibility and the like. It is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of a through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient. As a forming material of the elastic member 24, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the elastic material include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can.

Next, second and third embodiments of the present invention will be described.
About the underpants type disposable diaper of 2nd and 3rd embodiment, the difference with 1st Embodiment is mainly demonstrated and description is abbreviate | omitted about the same point. The points that are not particularly described are the same as in the first embodiment. In FIG.7 and FIG.8, the same code | symbol is attached | subjected to the component etc. similar to the diaper component etc. of 1st Embodiment.

In diaper 1 'of 2nd Embodiment, as shown in FIG. 8, the surface sheet 31 is wound down to the back surface side of the absorber 33, and the absorber 33 side in the back sheet 32 side of the absorber 33 is shown. A joining point 84 is formed at a position spaced from the edge, where the portion where the topsheet 31 is wound and the sheet material 35 for forming the first and second three-dimensional gathers 34 and 36 are joined. The absorbent body 33 in the diaper 1 ′ is smaller than the lower absorbent core 331 having a rectangular shape in a plan view provided with a pair of left and right bending guide portions 333 in the portion disposed in the crotch C, and smaller than the lower absorbent core 331. The upper absorbent core 332 laminated on the lower absorbent core 331 and a core wrap sheet (not shown) covering these are formed. The bending guide portion 333 is a missing portion where the constituent material of the absorbent core such as pulp fiber is not disposed, a low basis weight portion where the constituent material of the absorbent core is less than other portions, a slit, etc. The bending rigidity is reduced, and both side portions of the absorber 33 are easily raised.
Similarly to the first embodiment, the diaper 1 ′ of the second embodiment has a first three-dimensional gather 38 and a second three-dimensional gather 34, which stand up at the crotch part C, but have their upstanding ends. The linear joint portion 30 to be formed is formed by joining the sheet materials 35 that are folded back and face each other.

  The first three-dimensional gather 38 and the second three-dimensional gather 34 in the diaper 1 'of the second embodiment are also fixed to the ventral seat member 2A and the back seat member 2B in the same manner as the first embodiment, although not shown. ing. Therefore, the same effect as 1st Embodiment can be show | played also by the diaper 1 'of 2nd Embodiment.

In the diaper 1 ″ of the third embodiment, as shown in FIG. 9, the top sheet 31 and the back sheet 32 are joined to each other at the outer sides of both side edges of the absorbent body 33, and the joint is moved up and down. The sheet material 35 is integrated so as to be sandwiched between the two and the linear joint 30 is formed. The absorbent body 33 in the diaper 1 "is composed of an hourglass-shaped lower absorbent core 331 and a lower absorbent core 331 in plan view. The upper absorbent core 332 is compact and is laminated on the lower absorbent core 331, and a core wrap sheet (not shown) covering them.
The diaper 1 '' of the third embodiment also has a first three-dimensional gather 38 and a second three-dimensional gather 34, as in the first embodiment, and these stand up in the crotch part C.

  The first three-dimensional gather 38 and the second three-dimensional gather 34 in the diaper 1 "of the third embodiment are also fixed to the ventral seat member 2A and the back seat member 2B in the same manner as in the first embodiment, although not shown. Therefore, the same effect as that of the first embodiment can be obtained by the diaper 1 '' of the third embodiment.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, the abdominal extension part 21a and the dorsal extension part 21b may not be provided respectively. Moreover, although the abdominal side extension part 21a or the back side extension part 21b is provided, it can also be set as the form which does not distribute the elastic member 24 there.
As the bonding means 81 to 83 for fixing the first three-dimensional gather 38 and the second three-dimensional gather 34, other bonding means such as a heat seal, a high frequency seal, and an ultrasonic seal may be used instead of or together with the adhesive. good. In addition, the first three-dimensional gather 38 and the second three-dimensional gather 34 are not only the part where the elastic members 36 and 39 are arranged, but also the whole area on the fixed end side from the part where the elastic members 36 and 39 are arranged. Or the entire width direction of the first three-dimensional gather 38 or the second three-dimensional gather 34 can be fixed by the joining means.

The sheet material forming the first three-dimensional gather 38 and the sheet material forming the second three-dimensional gather 34 may be separate sheet materials. In addition, each sheet material may be a single-layer sheet material that is partially multilayered, and an elastic member may be disposed between the layers of the multilayer portion.
Moreover, although the side seal part 4 is formed in the side edge parts 2a and 2b of the abdominal side and the back side sheet member, the abdominal side sheet member 2A and the back side sheet member 2B are joined to the outside of the side seal part 4. It may have a non-joined portion with a narrow width (for example, more than 0 mm and not more than 20 mm).

The pants-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.
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

1,1 ', 1 "pants-type disposable diapers (pants-type absorbent articles)
2A Abdominal sheet member 2a, 2a Side edge portion 21a Abdominal side extension portion 2B Back side sheet member 2b, 2b Side edge portion 21b Back side extension portion 22 Outer layer sheet 23 Inner layer sheet 24 Elastic member 3 Absorbent body 31 Top sheet 32 Back sheet 33 Absorber 33a Absorbent core 34 Second solid gather 35 Sheet material 36 Elastic member forming second solid gather 38 First solid gather 39 Elastic member forming first solid gather 4 Side seal portion 5 Waist opening Part 6 leg opening part A abdominal side part B dorsal side part C crotch part G1 waist elastic part G2 waist circumference elastic part G3 extension part elastic part

Claims (6)

An abdominal sheet member disposed on the abdomen side of the wearer, a back side sheet member disposed on the back side of the wearer, and a vertically long absorptivity fixed across the abdomen sheet member and the back sheet member A pant-type absorbent article comprising a main body and having a pair of side seal portions formed by bonding the abdominal sheet member and the back sheet member to both side edges of the abdominal sheet member and the back sheet member. Because
Each of both sides in the longitudinal direction of the absorbent main body has a first solid gather and a second solid gather formed outside the first solid gather in the width direction of the absorbent main body,
The first three-dimensional gather is fixed in a state where it is tilted to the inner side in the width direction of the absorbent main body on each of the ventral sheet member and the back sheet member,
The second three-dimensional gather is fixed on the abdominal sheet member in a state where it is tilted inward in the width direction of the absorbent main body, and is absorbed on the crotch side edge of the back sheet member. A pants-type absorbent article that is fixed in a state of being tilted outward in the width direction of the sexable body.   The elastic member forming the second three-dimensional gather extends in parallel with the longitudinal direction of the absorbent main body in the entire area of the portion located on the ventral sheet member and the portion located on the back seat member. The underpants-type absorbent article according to 1.   The back seat member has a length in the longitudinal direction of the absorbent article that is longer than the length of the side seal portion in the same direction, and extends downward from the side seal portion over the entire area between both side edges of the back seat member. A backside extending portion that extends at substantially the same width, and the second three-dimensional gather is placed outwardly in the width direction of the absorbent main body on the edge of the crotch portion of the backside extending portion. The pants-type absorbent article according to claim 1 or 2, which is fixed in a state of being tilted to the side.   The elastic member that forms the second three-dimensional gather extends across a back side sheet member main body having a side seal portion at both side edges of the back side sheet member and the back side extension part. Pants-type absorbent article.   The ventral sheet member has an abdominal extension part that is longer in the longitudinal direction of the absorbent article than the length of the side seal part in the same direction and extends downward from the side seal part. The underpants type absorbent article in any one of 1-4.   The pants-type absorbent article according to claim 5, wherein the second three-dimensional gather is fixed in a state where the second three-dimensional gather is tilted inward in the lateral direction of the absorbent article on the ventral extension part.

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