JP2011025006A - Pants type absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants type absorptive article which is excellent in slipping down prevention though an outer cover body is a pants type absorptive article which is divided into a belly-side outer cover body disposed on the belly side of the wearer and a back-side outer cover body disposed on the back side of the wearer. <P>SOLUTION: The pants type absorptive article 1 comprises the belly-side outer cover body 2A disposed on the belly side of the wearer, the back-side outer cover body 2B disposed on the back side of the wearer, an absorptive body 3 affixed so as to bridge between the belly-side outer cover body and the back-side outer cover body, and side seal sections 4, 4. The belly-side outer cover body 2A and the back-side outer cover body 2B are respectively provided with extended portions 21a, 21b extending downward from the side seal sections. The width of the extended portions 21a, 21b in the longitudinal direction of the absorptive article is uniform in the lateral direction and is greater than the length of the side seal sections 4. Portions of the extended portions 21a, 21b of the belly-side outer cover body and/or the back-side outer cover body, the portions of the extended portions being located outside both the side edges of the absorptive body 3, are stretchable in the lateral direction of the absorptive article. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

Conventionally, an hourglass-shaped exterior body that extends from the abdominal side portion disposed on the wearer's ventral side, the crotch portion disposed on the wearer's crotch portion, and the back side portion disposed on the wearer's back side, and the exterior An absorptive main body fixed to the inner surface side of the body, and a waist opening and a pair of leg openings by joining both side edges of the exterior body on the abdominal side and both side edges of the exterior body on the back side 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 strip-shaped raw fabric of the exterior body and remove unnecessary portions as trims. It is.

In addition, as a conventional pant-type absorbent article, the exterior body is divided into an abdominal exterior body disposed on the wearer's belly side and a back side exterior body disposed on the wearer's back side, The absorbent main body is fixed so as to span the abdominal exterior body and the back exterior body, and the left and right side edges of the abdominal exterior body are joined to the left and right side edges of the back side exterior body. There are known pant-type absorbent articles. For example, Patent Document 1 includes, as such a pant-type absorbent article, an annular elastic belt composed of a front belt portion and a rear belt portion, an absorbent main body, and a longitudinal length of the rear belt portion (backside exterior body). A pull-on garment is described in which the length in the direction is longer than the length in the longitudinal direction of the front belt portion (ventral side exterior body).
In addition, as a conventional pant-type absorbent article, Patent Document 2 includes a cylindrical waistline portion formed from an abdominal exterior sheet and a back exterior sheet, and an absorbent main body. A side body portion and a back side extension portion extending below the side body portion, and the extension rate of the second elastic elastic member provided on the buttock cover portion on both sides of the back side extension portion is determined by the back side. A pants-type disposable diaper is described in which the stretch rate of the first elastic elastic member provided at the middle and lower end of the main body is higher.

Special table 2008-508082 JP 2008-178682 A

The pants-type absorbent article in which the exterior body is divided into the abdominal exterior body disposed on the wearer's ventral side and the back side exterior body disposed on the wearer's back side is obtained from the strip-shaped original fabric of the exterior body The trim to be removed can be made unnecessary, or the trim to be removed can be reduced in size, but on the other hand, if the tightening force of the waist opening and / or the leg opening is not increased, there is a problem that the trim easily falls off. there were.
In the pull-on garment of Patent Document 1, the length of the back belt portion in the vertical direction is longer than the length of the front belt portion (ventral side exterior body), so that the coverage of the wearer's buttocks is enhanced. However, the pull-on garment of Patent Document 1 also has a problem that it is easy to slip off unless the tightening force of the waist opening and / or the leg opening is increased.
The underpants type paper diaper of patent document 2 is preventing the expansion | swelling and the droop in this back side extension part by devising the expansion rate of the elastic elastic member arrange | positioned in the back side extension part of a back side exterior sheet. Further, it is disclosed that the abdominal side exterior sheet may also have a ventral side extension portion that extends downward from the abdominal side body portion that forms the cylindrical waistline portion. However, in the extension part of the underpants type paper diaper of patent document 2, the width | variety of an exterior sheet is narrowed as it approaches the crotch side, and the generated trim cannot be made completely unnecessary.

  Therefore, the present invention is a pants-type absorbent article in which the exterior body is divided into an abdominal exterior body disposed on the wearer's ventral side and a back side exterior body disposed on the wearer's back side. It is related with the underpants type absorbent article excellent in slip-off prevention.

  The present invention is fixed so as to span an abdominal exterior body disposed on the wearer's ventral side, a back exterior body disposed on the wearer's back side, and the abdominal exterior body and the back exterior body. A side seal formed by joining the abdominal exterior body and the back exterior body to both side edges along the longitudinal direction of the absorbent article of the abdominal exterior body and the back exterior body. A pant-type absorbent article having a portion, wherein the length of the absorbent article in the longitudinal direction is longer than the length of the side seal part, respectively, The pant-type absorbent article has an extension part extending downward, and the extension part of the ventral exterior body has elasticity in the lateral direction of the absorbent article. is there.

  Further, the present invention is a method for producing the above-described pant-type absorbent article, wherein the abdominal exterior body continuum and the back side exterior body continuum are continuously conveyed with a predetermined interval therebetween. However, the step of fixing the absorbent main body between the abdominal exterior body continuum and the back exterior body continuum so as to be bridged and obtaining the diaper continuous body, the process of folding the diaper continuous body in two, and the folded diaper In the continuum, the side seal part is formed so as not to cover the full width of each of the abdominal exterior body continuum and the back side exterior body continuum, and the diaper continuum after the side seal part formation is divided into individual diapers. The manufacturing method of the underpants type absorbent article provided with the process to do.

  The pant-type absorbent article of the present invention is a pant type in which the exterior body is divided into a ventral-side exterior body disposed on the wearer's belly side and a back-side exterior body disposed on the wearer's back side. Although it is an absorbent article, it has a good appearance and is excellent in slip-off prevention and wearing feeling.

FIG. 1 is a view showing a use state (wearing state) of a pants-type disposable diaper according to an embodiment of the present invention, where (a) is a view seen from the abdominal side, and (b) is a side view. The figure seen from (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. FIG. 3 is a partially broken enlarged view showing an abdominal or dorsal exterior body in the pants-type disposable diaper shown in FIG. 1. FIG. 4 is a diagram showing a cross section along the diaper lateral direction of the extended portion stretchable part in the pants-type disposable diaper shown in FIG. 1, (a) is a state in which the elastic member 24 is extended to eliminate wrinkles, b) is a view showing a state in which the elastic member 24 is contracted to form the flange 29. FIG. FIG. 5 is a diagram showing a preferred method for manufacturing the pants-type disposable diaper shown in FIG. FIG. 6: is the partially broken top view which looked at the underpants type disposable diaper of other embodiment of this invention from the stomach side exterior body side. FIG. 7: is sectional drawing which shows the cross section of the crotch part in the underpants type disposable diaper of other embodiment of this invention. FIG. 8 is a cross-sectional view showing a cross section of an extended portion of the backside exterior body or the abdominal side exterior body in the pants-type disposable diaper shown in FIG. 7. FIG. 9 is a diagram showing another preferred manufacturing method of the pants-type disposable diaper shown in FIG.

Hereinafter, the underpants type absorbent article of the present invention will be described based on a preferred embodiment thereof with reference to the drawings.
The pants-type disposable diaper 1 (hereinafter, also referred to as diaper 1) according to the first embodiment of the present invention, as shown in FIGS. 1 and 2, is an abdominal side exterior body 2A disposed on the abdomen side of the wearer, A backside exterior body 2B disposed on the back side of the wearer, and an absorptive exterior body 2A and an absorbent main body 3 fixed so as to be bridged over the backside exterior body 2B. The side edge portions 2a, 2a and the side edge portions 2b, 2b of the backside exterior body 2B are joined to form a pair of side seal portions 4, 4.
Further, in the abdominal exterior body 2A and the back exterior body 2B, the lengths La and Lb in the longitudinal direction of the absorbent article are longer than the length L4 of the side seal part 4, and are respectively lower than the side seal part 4. It has the extension parts 21a and 21b extended to. Moreover, the part located in the outward direction from each side edge of the absorptive main body 3 in the said extended part 21a of 2 A of ventral | abdominal exterior bodies has a stretching property in the horizontal direction (Y direction) of an absorbent article. . Here, having the elasticity in the transverse direction of the absorbent article is not limited to having elasticity in the lateral direction (Y direction) only, but in the lateral direction (Y direction) and the longitudinal direction (X direction). You may have. Moreover, it may expand and contract in all directions within the plane.

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

As shown in FIG. 2, the absorbent main body 3 of the diaper 1 has 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. It has an absorbent core 33 and is formed in a rectangular shape that is long in the X direction.
Side cuffs 34 and 34 made of a liquid-resistant or water-repellent and breathable material are formed on both sides in the longitudinal direction of the absorbent main body 3. In the vicinity of the free end of each side cuff 34, a side cuff elastic member 35 is arranged in an extended state. When the diaper 1 is worn, the side cuff 34 is erected by contracting the side cuff elastic member 35, and the outflow of liquid from the absorbent main body 3 to the outside in the width direction is prevented. As the top sheet 31, the back sheet 32, and the absorbent core 33, the same ones conventionally used for this type of absorbent article can be used. An exterior sheet such as a nonwoven fabric or a film is disposed on the outside of the absorbent main body 3. The exterior sheet may be integrated with the back sheet 32.

The ventral exterior body 2A has a horizontally long rectangular shape when the diaper 1 is expanded and extended (see FIG. 2), and a pair of left and right side edge portions 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 exterior body 2B has a horizontally long rectangular shape, a pair of left and right side edges 2b, 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 2a of the ventral side exterior body 2A and a part 2b ′ of the side edge 2b of the back side exterior body 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. FIG. 1 shows a state where the infant's trunk 7 a is inserted into the waist opening 5 and the infant's legs 7 b and 7 b are inserted into the leg openings 6 and 6.

  As for the absorptive main body 3, the one end side (part which overlaps with the ventral | abdominal exterior body 2A) of the longitudinal direction is fixed to the center part of the Y direction of the abdominal exterior body 2A via an adhesive agent, and the other end of a longitudinal direction The side (portion overlapping with the backside exterior body 2B) is fixed to the center of the backside exterior body 2B in the Y direction via an adhesive.

As shown in FIG. 2, the belly side exterior body 2 </ b> A and the back side exterior body 2 </ b> B are in a state in which the elastic member 24 is stretched as shown in FIG. 2 for forming a gather by contraction of the elastic member 24 disposed on the sheet. It is preferably a horizontally long rectangular shape, and like a diaper according to a third embodiment to be described later, a material that exhibits stretchability by an elastic filament or the like fixed to a non-stretchable nonwoven fabric is substantially In particular, it is preferably a horizontally long rectangular shape in a non-stretched state.
In addition, after the elastic filament is fixed between the nonwoven fabrics, an elastic sheet such as an elastic sheet that is stretched by being bitten between a pair of pressing molds that mesh with each other is joined to the non-extensible sheet in an extended state. And when the ventral exterior body and back side exterior body which consist of both sheets are obtained, it is preferable that the shape in the state extended until this elastic sheet is extended with a non-extensible sheet | seat is a laterally long rectangular shape. .

  As shown in FIG. 2, the side seal portion 4 is formed shorter than either the length La of the abdominal exterior body 2A or the length Lb of the back exterior body 2B. The exterior body 2B is formed with extending portions 21a and 21b that extend downward from the side seal portion 4 (downward when worn, downward in each figure of FIG. 1).

As shown in FIG. 3, the ventral exterior body 2 </ b> A and the back exterior body 2 </ b> B in the diaper 1 both have an outer layer sheet 22 that forms the outer surface of the diaper, and an inner layer sheet 23 disposed on the inner surface side of the outer layer sheet 22, And a plurality of thread-like elastic members 24 disposed between the sheets 22 and 23, each having a waist stretchable part G1, a waistline stretchable part G2, and an extended part stretchable part G3.
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, and the extended stretchable part G3 is It is formed in the extension part 21a of the exterior body 2A and the extension part 21b of the back side exterior body 2B, and the waist extension part G2 is a waist in the X direction in each of the abdominal side exterior body 2A and the back side exterior body 2B. It is formed between the stretchable part G1 and the extended part stretchable part G3. The waistline stretchable part G2 and the extended partial stretchable part G3 exhibit stretchability at least in the lateral direction (Y direction) of the diaper 1 at the portions located outward from both side edges in the longitudinal direction of the absorbent main body 3. . In addition, in FIG. 3, the position where the absorptive main body 3 is arrange | positioned is shown with the dashed-two dotted line.

  In the waist stretchable part G1, the waistline stretchable part G2, and the extended partial stretchable part G3, the outer layer sheet 22 and the inner layer sheet 23 are joined at a large number of joints 26 formed in a dotted pattern. More specifically, a plurality of longitudinal joint rows in which the joints 26 are intermittently arranged in series in the longitudinal direction (X direction) of the diaper 1 are formed in the lateral direction (Y direction) of the diaper 1. . Further, the positions in the X direction of the respective joints in the longitudinal joint rows are also consistent in all the longitudinal joint rows.

  And in any of the expansion-contraction parts G1-G3, the some elastic member 24 is distribute | arranged so that each may pass between the junction parts 26 adjacent to the vertical direction. In addition, each elastic member 24 is fixed between the sheets 22 and 23 at an end fixing portion 27 or an absorbent main body fixing portion 28 described later. Also not fixed.

The waist stretchable part G1 of the ventral exterior body 2A is a pair of end fixings in which the outer layer sheet 22 and the inner layer sheet 23 are joined to both side edges 2a, 2a of the ventral exterior body 2A via an adhesive. It has a portion 27 (see FIG. 3). The elastic member 24 disposed in the waist stretchable part G1 is fixed between the sheets 22 and 23 in each of the pair of end fixing parts 27, and between the end fixing parts 27, the elastic member 24 is located on any of the sheets 22 and 23. Also not fixed. The same applies to the waist stretchable part G1 of the backside exterior body 2B.
The waistline stretchable part G2 and the extended part stretchable part G3 of the ventral-side exterior body 2A are both attached to one side edge of the ventral-side exterior body 2A via the adhesive between the outer layer sheet 22 and the inner layer sheet 23. The outer layer sheet 22 and the inner layer sheet 23 are bonded via an adhesive in the vicinity of the position of the side edge 3c of the absorbent main body 3. An absorbent main body side fixing portion 28 is provided. The elastic member 24 disposed on the waist elastic part G2 and the extended part elastic part G3 is fixed between the sheets 22 and 23 in the end fixing part 27 and the absorbent main body side fixing part 28, respectively. Between the fixing part 27 and the absorbent main body side fixing part 28, it is not fixed to any of the sheets 22 and 23. The same applies to the waistline stretchable part G2 and the extended part stretchable part G3 in the backside exterior body 2B.

As shown in FIG. 3, the absorbent main body side fixing portion 28 may be formed so as to extend inside and outside the side edge 3 c of the absorbent main body 3, but is formed so as to overlap the absorbent main body 3 as a whole. May be. The aspect in which the entirety overlaps with the absorbent main body 3 is an aspect in which the position of the end of the absorbent main body side fixing portion 28 on the lateral side of the diaper coincides with the position of the side edge 3c of the absorbent main body 3. Both of the aspect in which the absorbent main body side fixing portion 28 is formed with a predetermined interval between the side edge 3c of the absorbent main body 3 are included.
Moreover, the absorptive main body side fixing | fixed part 28 can also be formed in the outer side of a diaper horizontal direction rather than the side edge 3c of the absorptive main body 3. FIG.

  In each of the waist stretchable part G1, the waistline stretchable part G2 and the extended partial stretchable part G3, the elastic member 24 contracts, so that the sheets 22 and 23 between adjacent longitudinal joint line are expanded outward. As a result, a flange 29 composed of the sheet 22 or the sheet 23 is generated between the adjacent longitudinal joining portion rows, and a hollow portion 30 surrounded by the flange 29 and the flange 29 is formed between the sheets 22 and 23. (See FIG. 4). By forming the heel 29 and the hollow portion 30, the softness of the abdominal exterior body 2 </ b> A and the back exterior body 2 </ b> B is improved to improve the touch and the like, and between the heel 29 formed on the skin contact surface side Air is easy to circulate and has excellent anti-sag properties. In particular, when the inner layer sheet 23 is formed of a breathable sheet such as a nonwoven fabric, moisture in the diaper 1 is more easily released to the outside.

In the diaper 1 of the present embodiment, since the above-described extending portions 21a and 21b are formed on the abdominal exterior body 2A and the back exterior body 2B, when the diaper 1 is worn, the abdominal exterior body 2A and As shown in FIG. 1 (b), the side edges 2a, 2b existing in the extended portions 21a, 21b of the backside exterior body 2B are divided into the ventral side direction and the backside direction and open in an inverted Y shape. A concave edge portion is formed downward along the leg of the leg portion 7b. In addition, the extension part stretchable part G3 is located in the extension parts 21a and 21b of the ventral side exterior body 2A and / or the back side exterior body 2B, and the stretchability in the diaper lateral direction is given to the extension parts 21a and 21b. Therefore, the edge part of the extension parts 21a and 21b hits the upper part of the leg part 7b flexibly, and prevents the diaper 1 from slipping downward.
In addition, the stretching stress of the extended stretchable part G3 functions to further strengthen the stretched stress of the waist stretchable part G1 and the waistline stretchable part G2 that tightens the body when worn, and the fit to the body is enhanced.
Therefore, according to the diaper 1, excellent slip-off prevention properties can be obtained without excessively increasing the tightening force of the waist opening 5 and the leg opening 6.

  Further, the extended portions 21a and 21b extend outward in the diaper lateral direction from both side edges of the absorbent main body 3, and the extended portions are appropriately contracted, so that the edge portions 21a and 21b are illustrated in FIG. As shown in FIG. 1 (b), the peripheral part of the leg opening having a sense of unity with the absorbent main body 3 is shaped, so that it looks good and does not give a sense of anxiety to the mole.

  Moreover, in the diaper 1, since the extension parts 21a and 21b are formed in the abdominal exterior body 2A and the back exterior body 2B, the side seal part 4 is relatively straight as shown in FIG. Since it is easy to maintain the state, it is possible to apply a uniform and even tightening force to the abdominal side A and the back side B.

  Moreover, in the diaper 1, not only the extension part 21a of the ventral-side exterior body 2A but also the extension part 21b of the back-side exterior body 2B is imparted with stretchability in the diaper lateral direction. Therefore, the slip-off preventing property is further improved.

Moreover, in the diaper 1, in the extension part expansion-contraction part G3, while each elastic member 24 is being fixed between the sheets 22 and 23 in the edge part fixing | fixed part 27 and the absorptive main body side fixing | fixed part 28, other than these The part is not fixed to any of the sheets 22 and 23. Therefore, the elastic member 24 does not impair the expansion and contraction force, and the heel is stably formed, and the end fixing portion 27 is drawn toward the absorbent main body side, and as shown in FIG. A downwardly-facing concave edge portion around the leg 7b can be easily formed without excessively increasing the expansion ratio of the elastic member 24.
In addition, each elastic member 24 is not fixed at the joint portion 26, and each elastic member 24 can be freely expanded and contracted over a wide range in the longitudinal direction without being restrained by the joint portion 26. Moreover, it can move to the diaper vertical direction between the junction parts 26 and 26 adjacent to the vertical direction (X direction) of the diaper 1. FIG. Therefore, after the urination after wearing the diaper 1, when the absorbent main body that has increased in weight due to the absorption of urine hangs down, the elastic member 24 is inclined slightly and exhibits a lifting force in the waist direction. can do. From the viewpoint of facilitating movement of the elastic member 24 in the diaper longitudinal direction between the joints 26, 26, the distance between the joints adjacent in the diaper longitudinal direction is the width (elasticity) of the elastic member 24 disposed between the elastic members 24. When the member has a circular cross section, the diameter is preferably 2 to 100 times, more preferably 5 to 50 times the diameter of the elastic member.
In addition, the elastic member 24 in the extension part stretchable part G3 is not fixed between the sheets 22 and 23 in the end fixing part 27 and the absorbent main body side fixing part 28, but a pair of end fixing parts 27 and 27. Only the sheet 22 and 23 are fixed, and the end fixing portions 27 and 27 are not fixed to any of the sheets 22 and 23. In that case, the same effect can be obtained.

  The degree of stretchability in the diaper lateral direction of each of the extended portions 21a and 21b is determined from the lateral edge 3c of the absorbent main body 3 of each of the extended portions 21a and 21b in the unfolded and extended diaper 1 in the lateral direction. When the length extending in the direction is 100%, the same length in the contracted state is preferably 90 to 15%, more preferably 60 to 20%, and more preferably 50 to 25%. Is more preferable.

From the viewpoint of ensuring that one or more of the above-described effects are more reliably exhibited, the abdominal exterior body 2A and the back exterior body 2B are each provided with an extension length L5 of the extension portions 21a and 21b. L6 is preferably 5 to 150% of the length L4 of the side seal portion 4 and more preferably 25 to 70%.
From the same viewpoint, the extending length L5 of the extending portion 21a of the ventral side exterior body 2A is preferably 5 to 60%, particularly 20 to 40% of the length La of the ventral side exterior body 2A. The extension length L6 of the extension portion 21b of the backside exterior body 2B is preferably 5 to 60%, particularly 20 to 40%, of the length Lb of the backside exterior body 2B.
In addition, it is preferable that extension length L5, L6 of each extension part 21a, 21b is 10 mm or more, and it is more preferable that it is 20 mm or more.
In the case of diapers for infants, the extension lengths L5 and L6 of the extension portions 21a and 21b are more preferably 10 to 100 mm, and still more preferably 20 to 70 mm. In the case of an adult diaper, the extension lengths L5 and L6 of the extension portions 21a and 21b are more preferably 10 to 150 mm, and still more preferably 20 to 100.

  Further, the abdominal exterior body 2A and the back exterior body 2B are formed from the above-described extension portion 21a, from the viewpoint of reducing anxiety about leakage by reducing the exposed portion of the skin that is visible when the wearer is viewed from the front side. It is preferable that the extension lengths L5 and L6 of 21b are substantially equal. The extension lengths L5 and L6 of the extension portions 21a and 21b are substantially equal to the extension length L5 of the extension portion 21a of the ventral side exterior body 2A and the extension length 21b of the back side exterior body 2B. The case where the difference from the protruding length L6 has a relationship of 5 mm or less.

On the other hand, extending portions 21a and 21b are formed on both the abdominal exterior body 2A and the back exterior body 2B, and the extension length L6 of the extension portion 21b of the back exterior body 2B is set to It is also preferable to make it longer than the extension length L5 of the extension portion 21a. According to the pants-type absorbent article having such a configuration, the front side of the wearer's crotch can be covered to some extent while covering the buttock to prevent excessive exposure, and thus the diaper is excellent in appearance. From such a point of view, the extension length L6 is more preferably 1.1 to 2.5 times the extension length L5.
In the pant-type absorbent article in which the extending portion 21b of the backside exterior body 2B is longer than the extending portion 21a of the abdominal exterior body 2A, only the extending portion 21b of the backside exterior body 2B is stretchable. It is also preferable from the viewpoint of improving fit and appearance on the back side of the wearer.

  The outer layer sheet 22 and the inner layer sheet 23 have extended folded portions 22a and 23a that are folded back to the inner layer sheet 23 side at the edge 2d that forms the opening peripheral edge of the waist opening. 22a and 23a are joined to the non-folded portions of the outer layer sheet 22 and the inner layer sheet 23 in the side seal portion 4, and the portion overlapping the longitudinal direction of the absorbent main body 3 is bonded to the absorbent main body by an adhesive. 3 is joined to the surface of the top sheet side.

  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, the preferable manufacturing method of the underpants type disposable diaper 1 of 1st Embodiment is demonstrated with reference to FIG. The manufacturing method of this embodiment is a method of manufacturing the diaper 1 continuously.
In the manufacturing method of this embodiment, as shown in FIG. 5, the wide strip sheet 122 that is the original fabric of the outer layer sheet and the wide strip sheet 123 that is the original fabric of the inner layer sheet are elastic members between them. 24 is superposed on an intervened state in an expanded state. Before the two belt-like sheets 122 and 123 are overlapped, the adhesive for forming the end fixing portion 27 and the absorbent main body-side fixing portion 28 is attached to the belt-like sheet 122 and / or the belt-like sheet 123 with an adhesive coating machine (not shown). The agent is intermittently applied, and the elastic member 24 is fixed between the belt-like sheets 122 and 123 at both fixing portions 27 and 28 by pressurization by the nip roll 90.

Next, the overlapped belt-like sheets 122 and 123 are arranged opposite to the pressure roll 91 and the pressure roll 91 in which the convex portion for forming the joint portion 26 and the convex portion for cutting the elastic member 24 are formed on the peripheral surface. By introducing between the anvil roll 92 and partially pressurizing and heating it, the multiple joints 26 described above are formed, and the elastic member 24 at the site where the absorbent main body 3 is disposed is cut. To do.
Next, the two belt-like sheets 122 and 123 laminated with the elastic member 24 interposed are divided into two belt-like sheets 102A and 102B by the dividing means 93. The two belt-like sheets 102A and 102B generated by the division are used as the abdominal exterior body continuum 102A and the back side exterior body continuum 102B. The abdominal exterior body continuum 102A generally has a configuration in which a plurality of abdominal exterior bodies 2A of diapers 1 are continuous, and the back exterior body continuum 102B generally has a plurality of diaper 1 backs. The side exterior body 2B has a continuous configuration.
As the dividing means, various known cutting devices capable of continuously cutting the sheet can be used. For example, a cutter provided on the upstream side in the flow direction of the sheet, or an annular surface or peripheral portion. A cylindrical or disk-shaped cutter having a blade, a laser cutter, a high-pressure water flow cutter, or the like can be used. The method of dividing by the dividing means has an advantage that the dimension in the axial length direction of the pressure roll 91 and the like can be shortened.

  Next, the abdominal exterior body continuum 102A and the back side exterior body continuum 102A and the back side exterior body continuum 102B are continuously transported in a state where a predetermined interval is provided between the abdominal exterior body continuum 102A and the back side exterior body continuum 102B. The absorbent main body 3 is fixed to 102B so as to be bridged. In order to fix the absorbent main body 3, an adhesive is applied to the surface of the absorbent main body 3 on the back sheet side and / or the opposing surfaces of the two continuous bodies 102A and 102B. Further, in this embodiment, the side portions 102A ′ and 102B ′ along the flow directions of the abdominal exterior body continuum 102A and the back exterior body continuum 102B are covered with both end portions of the absorbent main body 3. The folded portion is fixed to both end portions.

And the diaper continuous body 101 obtained in this way is folded in half, and then the side seal portions 4 and 4 are formed by heat sealing, ultrasonic sealing, high frequency sealing, adhesive, etc., or a combination of these means To do. For the formation of the side seal portions 4 and 4, a seal device (not shown) provided with a pair of seal rolls is preferably used. Further, when the diaper continuous body 101 is folded in two, the edge portions 101 ′ generated by folding the side portion 102A ′ of the ventral side exterior body continuous body 102A and the side portion 102B ′ of the back side exterior body continuous body 102B overlap. Do as follows.
And after formation of the side seal parts 4 and 4, the diaper continuous body 101 is cut | disconnected to the dimension of each diaper 1 with a well-known cutting means (not shown). Thereby, the underpants type disposable diaper 1 of the structure mentioned above is obtained. The side seal portions 4 and 4 are formed so as not to cover the full widths of the abdominal exterior body continuum 102A and the back exterior body continuum 102B, and are formed on the abdominal exterior body 2A and the back exterior body 2B of the diaper 1. The extending portions 21a and 21b described above are formed.

  Regarding the manufacturing method of the present embodiment, points that are not particularly described can be manufactured in the same manner as the conventional manufacturing method of a so-called cross-flow type pants-type disposable diaper. For example, the absorptive main body 3 arranged on the abdominal exterior body continuum 102A and the back side exterior body continuum 102B is manufactured by a publicly known method of the absorptive body continuum 103 having a configuration in which the absorptive body is continuous in the longitudinal direction. Then, it can be obtained by cutting it into the size of one diaper. Moreover, the obtained absorptive main body 3 can be intermittently disposed on the ventral exterior body continuum 102A and the back exterior body continuum 102B after being rotated by 90 degrees.

  Moreover, since the diaper 1 of 1st Embodiment can be manufactured without removing the trim for leg opening part formation from the strip | belt sheet | seats 122 and 123 for exterior body formation in this way, a trim removal or re-introduction is possible. It is possible to manufacture efficiently and economically without using a process necessary for use. In addition, because trim does not occur, it is environmentally friendly.

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. Points that are not particularly described are the same as in the first embodiment, and the description of the first embodiment can be applied as appropriate. In the following description, the same reference numerals as those used for the components of the diaper of the first embodiment are assigned to the corresponding components of the second and third embodiments.

In the pants-type disposable diaper according to the second embodiment, the waist stretchable part G1, the waistline stretchable part G2, and the extension part stretchable part G3 in the abdominal exterior body 2A and the back exterior body 2B respectively form the outer surface of the diaper. The outer layer sheet 22 and the inner layer sheet 23 disposed on the inner side of the outer layer sheet 22 have a structure bonded over the entire area, and the elastic member 24 is fixed between the sheets 22 and 23 in the entire area of each stretchable portion. The elastic member 24 is fixed between the sheets 22 and 23 in an expanded state when the diaper is manufactured.
Also in the diaper of the second embodiment, irregular irregularities are formed in each of the waist stretchable part G1, the waistline stretchable part G2 and the extended part stretchable part G3 by contraction of the elastic member 24. Such a hollow structure is not formed.

  In the pants-type disposable diaper according to the second embodiment, the abdominal exterior body 2A and the back exterior body 2B have extended portions 21a and 21b extending downward from the side seal portion 4, and the abdominal exterior body The part which does not overlap with the absorptive main body 3 in the extending part 21a of 2A has elasticity in the diaper lateral direction. Therefore, the same operation effect as the underpants type disposable diaper of a 1st embodiment is produced.

  The pants-type disposable diaper according to the second embodiment is the method for manufacturing the diaper 1 described above, before laminating the wide belt-like sheet 122 that is the raw fabric of the outer layer sheet and the wide belt-like sheet 123 that is the raw fabric of the inner layer sheet. In addition, an adhesive is applied to the belt-like sheet 122 and / or the belt-like sheet 123 so as to be adhered to the entire region other than the portion where the absorbent main body 3 is overlaid, and the pressure roll 91 is used as a convex for cutting the elastic member 24. It can be manufactured in the same manner as the manufacturing method of the diaper 1 described above except that only the part is formed and the elastic member of the portion where the absorbent main body 3 is overlapped is cut.

  In the pants-type disposable diaper of the third embodiment, a large number of elastic filaments arranged so that the abdominal exterior body 2A and the back exterior body 2B extend in one direction without intersecting each other are substantially non-stretched. In the state, it consists of a stretchable sheet joined to a stretchable nonwoven fabric over their entire length. As such a stretchable sheet, those described in JP 2008-179128 A can be used. The elastic sheet preferably has elastic filaments sandwiched between two identical or different nonwoven fabrics. The elastic filament may be obtained by thread-like synthetic rubber yarn or natural rubber, or by dry spinning (melt spinning) or wet spinning. It is preferable that the elastic filament obtained by direct melt spinning without winding or storing the elastic filament is fixed to the nonwoven fabric. As the stretchable sheet, an elastic filament having a long fiber shape or a short fiber shape and randomly oriented can also be used.

  The stretch sheet used in the third embodiment is preferably composed of a total of two nonwoven fabrics, a first nonwoven fabric and a second nonwoven fabric, and a large number of elastic filaments sandwiched between the nonwoven fabrics. The first nonwoven fabric and the second nonwoven fabric may be of the same type or different types. The same kind of non-woven fabric as used herein refers to non-woven fabrics in which the non-woven fabric manufacturing process, the type of constituent fibers of the non-woven fabric, the fiber diameter and length of the constituent fibers, the thickness and basis weight of the non-woven fabric are all the same. When at least one of these is different, it is a different kind of non-woven fabric. Each nonwoven fabric can be extended. Stretchable means that (a) when the constituent fibers of the nonwoven fabric are stretched, and (b) even if the constituent fibers themselves are not stretched, the fibers that are joined at the intersection are separated, or the fibers are joined together This includes the case where the three-dimensional structure formed by a plurality of fibers is structurally changed, the constituent fibers are broken, the slack of the fibers is stretched, and the whole nonwoven fabric is stretched. Moreover, each nonwoven fabric may be already extendable in the state of the original fabric before being joined to the elastic filament. Alternatively, it may not be stretchable in the original fabric state before being joined to the elastic filament, but may be made stretchable by being processed so as to be stretchable after being joined to the elastic filament. . Specific methods for making the nonwoven fabric stretchable include heat treatment, stretching between rolls, biting stretch using tooth gaps and gears, and tensile stretching using a tenter. It is preferable that the nonwoven fabric is not stretchable in the state of the original fabric, from the viewpoint that the transportability of the nonwoven fabric is improved when the elastic filament is fused to the nonwoven fabric.

In the pants-type disposable diaper of the third embodiment, the abdominal exterior body 2A and the back exterior body 2B have extended portions 21a and 21b extending downward from the side seal portion 4, and the abdominal exterior body The part which does not overlap with the absorptive main body 3 in the extending part 21a of 2A has elasticity in the diaper lateral direction. Therefore, the same operation effect as the underpants type disposable diaper of a 1st embodiment is produced.
The pants-type disposable diaper according to the third embodiment includes, for example, the abdominal exterior body continuum 102A and the back exterior body continuum 102B configured as described above in the manufacturing method illustrated in FIG. Instead of supplying the two, the two belt-like sheets made of the stretchable sheet described in Japanese Patent Application Laid-Open No. 2008-179128 are supplied to the arrangement fixing portion. In the stretchable sheet, it is preferable to align the orientation direction of the elastic filament with the flow direction.

Next, fourth to sixth embodiments of the present invention will be described.
About the underpants type disposable diaper of 4th-6th embodiment, the difference with 1st Embodiment is mainly demonstrated and description is abbreviate | omitted about the same point. Points that are not particularly described are the same as in the first embodiment, and the description of the first embodiment can be applied as appropriate. In the following description, the same reference numerals as those assigned to the components of the diaper of the first embodiment are assigned to the corresponding components in the fourth to sixth embodiments.

In the extended portion 21a of the ventral-side exterior body of the pants-type disposable diaper of the fourth embodiment, as shown in FIG. 6, between the two sheets 22 and 23 constituting the abdominal-side exterior body 2A is end-fixed. It joins in the part 27, the absorptive main body side fixing | fixed part 28, and many joining parts 26 formed in the shape of a dot. And in the extension part expansion-contraction part G3, each elastic member 24 is being fixed between both sheet | seats 22 and 23 in the edge part fixing | fixed part 27 and the absorptive main body side fixing | fixed part 28, On the other hand, it absorbs with the edge part fixing | fixed part 27 and absorption. It is not fixed to any of the sheets 22 and 23 between the fixing main body side fixing portion 28.
Moreover, as shown in FIG. 6, the absorptive main body side fixing part 28 in the extended part 21a of the abdominal exterior body is formed so that the whole overlaps with the absorptive main body 3, and the extended part stretchable part G3. The elastic member 24 arranged in the stretched state contracts the sheets 22 and 23 constituting the ventral-side exterior body 2A even in a portion overlapping the side portion of the absorbent main body 3.

  Further, each elastic member 24 can be expanded and contracted integrally in a wide range in the longitudinal direction without being divided by the joint portion 26. Further, each elastic member 24 is not fixed at the joint portion 26, and is movable in the diaper longitudinal direction between the joint portions 26, 26 adjacent in the longitudinal direction (X direction) of the diaper 1. Therefore, after the urination after the diaper 1 is worn, when the absorbent main body that has increased in weight due to absorption of urine hangs down, the elastic member 24 is inclined slightly and exhibits a lifting force in the waist direction. can do. From the viewpoint of facilitating movement of the elastic member 24 in the longitudinal direction of the diaper between the joint portions 26, 26 adjacent to each other in the longitudinal direction of the diaper, the interval between the joint portions adjacent in the longitudinal direction of the diaper is the elasticity disposed therebetween. It is preferably 2 to 100 times, more preferably 5 to 50 times the width of the member 24 in the longitudinal direction of the diaper (the same as the diameter of the elastic member when the elastic member has a circular cross section).

The portion of the absorbent main body 3 that overlaps with the extended portion 21a of the ventral-side exterior body is an adhesive between the absorbent body 3 and, more specifically, between the left and right absorbent main body fixing portions 28. Etc., while having a central fixed region 3M joined and fixed to the abdominal exterior body 2A, the outer sides of both sides of the central fixed region 3M are not fixed to the abdominal exterior body 2A. The side non-fixed regions 3S and 3S are separable. On the other hand, in the vicinity of the longitudinal end 3a of the absorbent main body 3, the entire width of the absorbent main body 3 is joined to the ventral-side exterior body 2A. Specifically, the adhesive is applied to a region E <b> 8 wider than the width of the absorbent main body 3 on the inner layer sheet 23 in the vicinity where the longitudinal end 3 a of the absorbent main body 3 is fixed. And after arrangement | positioning of the absorptive main body 3, in the edge part 2d which makes the opening peripheral edge of a waist opening part, the longitudinal direction of the absorptive main body 3 is carried out by the extended folding | turning-back part 22a, 23a of the outer-layer sheet 22 and the inner-layer sheet 23. The direction end 3a is covered and bonded. In FIG. 6, E8 and M8 indicate a range in which the absorbent main body 3 is joined to the ventral-side exterior body 2A.
Since the extension part expansion / contraction part G3 contracts also on both sides of the absorbent main body 3, particularly in the part overlapping with the side non-fixed region 3S, the lower side of the exterior body 2A is the center in the width direction of the absorbent main body 3 (absorption The core of the diaper is better attracted to the sexual core side).

  In the pants-type disposable diaper of the fourth embodiment, the absorptive outer body 2A and the back outer body 2B have different bonding modes of the absorbent main body 3, and the extended portion 21a of the abdominal outer body and the absorbent main body are different. 3 is smaller than the bonding width between the extended portion 21b of the backside exterior body and the absorbent body. Moreover, the junction area of the extension part 21a of the abdominal exterior body and the absorbent main body 3 is smaller than the junction area of the extension part 21b of the back side exterior body and the absorbent body. More specifically, in the absorbent main body 3, the portion indicated by the width W8 at the center in the width direction as shown in FIG. For the extended portion 21b of the exterior body 2B, a pair of absorptions provided at a wider portion in the width direction of the absorbent main body 3, for example, at substantially the same position as the side edge in the longitudinal direction of the absorbent main body 3. The entire region between the fixing main body side fixing portions (see FIG. 3) 28 or 28 or the entire width of the absorbent main body 3 is joined to the extending portion of the back side exterior body 2B. Note that, in the vicinity of the longitudinal end portion 3a of the absorbent main body 3, the entire width of the absorbent main body 3 is joined to the backside exterior body in the same manner as the ventral side.

  In the pants-type disposable diaper according to the fourth embodiment, the bonding width between the extended portion 21a of the ventral-side exterior body and the absorbent main body 3 is the same as the bonding width between the extended portion 21b of the back-side exterior body and the absorbent body 3. Since it is small compared with the diaper of the first embodiment, the same effect as the diaper of the first embodiment is achieved. Further, for the extended portion 21b of the backside exterior body, while preventing the turn-up of the extended portion 21b and the covering of the heel portion from being lowered. The extended portion 21a of the abdominal exterior body can be contracted to some extent in the lateral direction of the diaper (Y direction) to be deformed into a shape along the legs, improving fit and The effect of not giving a sense of anxiety to the mole by reducing the gap.

As shown in FIGS. 7 and 8, the absorbent main body 3 in the pants-type disposable diaper of the fifth embodiment has an elastic member 136 disposed at the edge along the longitudinal direction of the diaper (absorbent article). As shown in FIG. 2, in the extended portions 21a and 21b of the abdominal exterior body and the back exterior body, the edge of the absorbent main body, the abdominal exterior body 2A and / or the back exterior body where the elastic member 136 is disposed. 2B is not joined.
More specifically, the absorbent main body 3 according to the fifth embodiment is located on both side portions in the longitudinal direction on the outer sides of both side edges in the longitudinal direction of the absorbent body 33, and the side gathers on the crotch portion C. It has the side part sheet | seat parts 134 and 134 which form 134c and 134c.

  The side sheet portion 134 exists over the entire length of the absorbent main body 3, and is fixed to the liquid-resistant or water-repellent sheet material 135 and the sheet material 135 in an expanded state as shown in FIGS. Elastic members 136 and 136 are provided. A plurality of elastic members 136 are provided along the side edge 134a in the vicinity of the side edge of the absorbent main body 3, more specifically, in the vicinity of the side edge 134a of the side sheet 134 (two in the illustrated example). ) The elastic member 136 is fixed in an extended state to the crotch C and the extended portions 21a and 21b of the abdominal exterior body 2A and the back exterior body 2B, and side portions to the crotch C and the extended portions 21a and 21b. A gather 134c is formed. The side gathers 134c are formed by the elastic members 136 disposed on the side sheet portions 134 being contracted, so that the sheet material 135 constituting the side sheet portions 134 is gathered or deformed into a wavy cross-sectional shape. Is. The side gather 134c should just be formed in the natural state and / or wearing state of a diaper. In the vicinity of the longitudinal end portions 3a and 3b of the absorbent main body 3, the side seat portion 134 is located between the side seal portions 4 and 4 in the ventral exterior body 2A and the back exterior body 2B, respectively. The main body and the backside exterior body are fixed to the main body and the diaper width direction in a state where they are lying down, and are formed in portions that overlap the extended portions 21a and 21b of the abdominal side exterior body and the backside exterior body. As shown in FIG. 8, the side gathers 134c are not fixed to the extending portions 21a and 21b. In FIG. 8, 8 is an adhesive.

  In the pants-type disposable diaper of the fifth embodiment, the side edge portion of the absorbent main body 3 on which the elastic member 136 is arranged is not fixed to the extended portions 21a and 21b of the ventral exterior body and the back exterior body. As a result, the same effect as the diaper of the first embodiment is achieved, the fitting property is further improved, and the slip-off preventing effect is further improved. The side gather 134c fits around the wearer's leg when the diaper 1 is worn.

  In addition, the absorptive main body 3 of 5th Embodiment has a pair of solid gather formation part 138 extended along the longitudinal direction of the absorptive main body 3 in the both sides of the longitudinal direction. The three-dimensional gather forming portion 138 includes a sheet material 135 and an elastic member 139 for forming a three-dimensional gather fixed to the sheet material 135. The three-dimensional gather forming unit 138 forms a three-dimensional gather 138c at least in the crotch part C. The three-dimensional gather 138c stands up toward the wearer's skin when the diaper 1 is worn, and prevents outflow of liquid from the absorbent main body 3 outward in the width direction. The three-dimensional gather forming portion 138 is fixed to the abdominal exterior body main body and the back exterior body main body located between the side seal portions 4 and 4 in a state where the body is lying inward in the diaper width direction. Moreover, the linear junction part 130 is extended along each both-sides edge part of the rectangular-shaped absorber 4, and is extended over the full length of the X direction of the absorber 33 and the absorptive main body 3. FIG. The linear joint portion 130 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 130, various well-known joining methods, such as a heat seal, an ultrasonic seal, a high frequency seal, and an adhesive agent, are used. The absorbent body 33 in the fifth embodiment includes a fiber aggregate made of pulp fibers or the like, or an absorbent core 33a in which a superabsorbent polymer is held, and core wrap sheets 33b and 33c covering the absorbent core 33a. As the material for forming the absorbent core 33a and the core wrap sheets 33b and 33c, the same materials as those conventionally used for this type of absorbent article can be used. From the viewpoint of improving the touch or the like, it is also preferable to provide an exterior nonwoven fabric in an overlapping manner on the non-skin contact surface side of the back sheet 32 in the crotch part C.

  The configuration of the absorbent main body in the pants-type disposable diaper according to the fifth embodiment and the bonding mode of the absorbent main body to the ventral-side exterior body and the back-side exterior body are the pants-type disposable diapers according to other embodiments described in this specification. In this case, the same effect can be obtained. The elastic member 136 disposed on each of the pair of side sheet portions 134 may be one or three or more instead of two. Further, the elastic member 13 forming the side gathers may be fixed between the top sheet and the back sheet that are extended outward from the side edge of the absorber 33.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above.
For example, only one of the extended portion 21a of the ventral side exterior body 2A and the extended portion 21b of the back side exterior body 2B is located on the portion located outward from both side edges 3c and 3c of the absorbent main body 3, You may have a stretching property in the horizontal direction of an absorbent article.

  Moreover, in the manufacturing method of the diaper 1 shown in FIG. 5, after the wide strip | belt-shaped sheet | seat 122 which is the raw fabric of an outer layer sheet | seat, and the wide strip | belt-shaped sheet | seat 123 which is the raw fabric of an inner layer sheet | seat are overlap | superposed, the division means 93 , The abdominal exterior body continuum 102A and the back exterior body continuum 102B were obtained. Instead, as shown in FIG. 9, the outer layer sheet 122A and the inner layer sheet for the abdominal exterior body 2A 123A, the outer layer sheet 122B and the inner layer sheet 123B for the backside exterior body 2B may be separately supplied to the joining portion to obtain the abdominal exterior body continuum 102A and the backside exterior body continuum 102B. In that case, the outer layer sheet 122A and the outer layer sheet 122B may be fed out from different rolls, or may be obtained by slitting a wide sheet on the upstream side (not shown). The inner layer sheet 123A and the inner layer sheet 123B may be drawn out from different rolls, or may be obtained by slitting a wide sheet on the upstream side (not shown).

  Further, the stretchable sheet used in the pants-type disposable diaper of the third embodiment is used as either the outer layer sheet and / or the inner layer sheet, and the ventral exterior body 2A and the back made of a laminated structure of the outer layer sheet and the inner layer sheet. It can also be set as the underpants type absorbent article which has the side exterior body 2B.

  Further, as shown in FIG. 5, the ventral exterior body continuum 102 </ b> A and / or the back exterior body continuum 102 </ b> B may be folded back on one side 102 </ b> A ′ and 102 </ b> B ′ along the flow direction. And it may cut | disconnect without passing through such a folding | returning process and may become the ventral | abdominal exterior body 2A or the back | dorsal exterior body 2B.

  Moreover, although the side seal part 4 is formed in the side edge parts 2a and 2b of an exterior body, you may have a non-joining part on the outer side of the side seal part 4. FIG.

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 Pants-type disposable diapers (pants-type absorbent articles)
2A Ventral exterior body 2a, 2a Side edge portion 21a extending along absorbent article longitudinal direction 2B Backside exterior body 2b, 2b Side edge portion along absorbent article longitudinal direction 21b extension portion 22 Outer layer sheet 23 Inner layer sheet DESCRIPTION OF SYMBOLS 3 Absorbent main body 31 Top sheet 32 Back sheet 33 Absorbent core 34 Side cuff 4 Side seal part 5 Waist opening 6 Leg opening A A ventral part B Dorsal part C Inseam

Claims (7)

An abdominal exterior body disposed on the abdomen side of the wearer, a back side exterior body disposed on the back side of the wearer, and an absorptive main body fixed so as to span the abdomen exterior body and the back exterior body Pants having side seal portions formed by joining the abdominal exterior body and the back exterior body to both side edges along the longitudinal direction of the absorbent article of the abdominal exterior body and the back exterior body Mold absorbent article,
Each of the ventral exterior body and the back exterior body has a uniform length in the longitudinal direction of the absorbent article, and the length in the longitudinal direction of the absorbent article is longer than the length of the side seal part. Having an extending portion extending downward from the side seal portion;
In the extended portion of the ventral exterior body and / or the back exterior body, the portions located outward from both side edges of the absorbent main body have elasticity in the lateral direction of the absorbent article. Pants-type absorbent article.   2. The pant-type absorbent article according to claim 1, wherein each of the ventral exterior body and the back exterior body has an extension length of the extension portion of 5 to 150% of a length of the side seal portion.   The pants-type absorbent article according to claim 1 or 2, wherein the extension length of the extension portion is substantially equal between the ventral-side exterior body and the back-side exterior body. Each of the ventral exterior body and the back exterior body includes an outer layer sheet, an inner layer sheet disposed on the inner surface side of the outer layer sheet, and a plurality of elastic members disposed between the two sheets.
The stretchable part having the stretchability in the extended part is joined between the outer layer sheet and the inner layer sheet by a large number of joints, and is vertically arranged by the joints intermittently arranged in the longitudinal direction of the absorbent article. A plurality of joint rows are formed, and a plurality of elastic members arranged in the stretchable part are arranged so as to pass between joints adjacent in the vertical direction, respectively. Any of the underpants-type absorbent articles.   The joint width between the extended portion of the ventral exterior body and the absorbent main body is smaller than the joint width between the extended portion of the back exterior body and the absorbent body. Pants-type absorbent article.   In the absorbent main body, an elastic member is disposed at an edge along the longitudinal direction of the absorbent article, and in the extended portion, the edge of the absorbent main body in which the elastic member is disposed, the ventral exterior body, and The pants-type absorbent article according to any one of claims 1 to 5, which is not joined to the backside exterior body. It is a manufacturing method of the underpants type absorbent article according to claim 1,
While continuously transporting the abdominal exterior body continuum and the back side exterior body continuum with a predetermined interval between them, the abdominal exterior body continuum and the back side exterior body continuum are absorbent to the absorbent body. The diaper continuous body, the diaper continuous body folded in half, and the folded diaper continuous body in the full width of each of the abdominal exterior body continuous body and the back side exterior body continuous body The manufacturing method of the underpants type absorbent article provided with the process of forming a side seal part so that it may not extend, and the process of dividing the diaper continuous body after side seal part formation into each diaper.

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