JP5523909B2 - Pants-type absorbent article and manufacturing method thereof - Google Patents

Description

  The present invention relates to a pants-type absorbent article such as a pants-type disposable diaper and a method for producing the same.

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, A pants-type absorbent article is known in which an absorbent main body is stretched over an abdominal exterior body and a back exterior body, and the abdomen and back exterior bodies are connected in a ring shape. 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).

  Moreover, although the exterior body is not divided into the abdominal exterior body and the back exterior body, Patent Document 2 discloses that the exterior sheet is placed on the portion of the front body that overlaps the absorber of the exterior sheet (exterior body). A cutting region is formed by cutting the elastic member disposed between the constituting sheets, and the width of the cutting region is gradually enlarged from the end on the waist opening side of the front body to the middle point, and from the middle point toward the center. On the side, a disposable diaper having a constant width is described.

Special table 2008-508082 JP 2002-273808 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 However, there is room for improvement in terms of appearance and fit in the vicinity of the crotch. The pull-on garment of Patent Document 1 is the same.
The disposable diaper described in Patent Document 2 is not a pants-type absorbent article whose exterior body is divided into an abdominal exterior body and a back exterior body, and also improves the appearance and fit in the vicinity of the crotch not.

  Therefore, the present invention is an absorbent article of a type 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. The present invention relates to an absorbent article with improved appearance and / or fit near the crotch.

  The present invention relates to an abdominal side exterior body disposed on the wearer's ventral side, a back side exterior body disposed on the wearer's back side, and an absorptivity fixed across the abdomen and the back exterior body. A pant-type absorbent article comprising a main body, wherein the abdominal exterior body and the back exterior body are connected in a ring shape, and the longitudinal direction of the absorbent main body in the abdomen and / or the back exterior body The first belt-like stretchable region that stretches in the lateral direction of the absorbent article from the position of the end portion of the absorbent article and the second belt-like stretchable region that stretches in the lateral direction of the absorbent article and is located on the crotch lower side. Each of the first and second belt-like stretchable areas is formed by extending an elastic member between two sheets constituting the abdominal or dorsal exterior body, and the absorption A non-stretchable part formed by cutting the elastic member in a portion overlapping with the main body, and a pair of stretchable parts on both sides thereof. In the non-stretchable portion and the non-stretchable portion of the second strip stretchable zone of the first strip stretchable zone, the length of the absorbent article lateral differ, there is provided a pants-type absorbent article.

  Moreover, this invention is a manufacturing method of the said pants | underpants type absorbent article, Comprising: Two strip | belt-shaped sheets which are the raw materials of a stomach side and a back side exterior body are in the state which interposed the elastic member between both. The overlapping and overlapping belt-like sheets are introduced between a convex roll having a convex portion for cutting an elastic member on the peripheral surface and another roll arranged opposite to the convex roll, and the elastic member is After the elastic member cutting step of cutting at portions corresponding to the non-stretchable portions of the first and second belt-like stretchable regions of the ventral and dorsal exterior bodies, and after the elastic member cutting step, the belt-like sheets are separated from the ventral exterior body portions. The manufacturing method of the underpants type absorbent article which comprises the division | segmentation process cut | disconnected and divided | segmented into a back side exterior body part is provided.

  The pants-type absorbent article of the present invention is a pants-type absorbent article of a type 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. Nevertheless, the appearance and / or fit near the crotch is improved.

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 schematic 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 of the stretched state in which the abdomen side of the pant-type disposable diaper shown in FIG. 1 is viewed from the outer surface side of the diaper. FIG. 4 is a partially broken enlarged view of the stretched state of the back side portion of the pants-type disposable diaper shown in FIG. 1 as viewed from the outer surface side of the diaper. FIG. 5 is a view showing a cross section along the diaper lateral direction of the back-side extending portion of the pants-type disposable diaper shown in FIG. 1, and (a) is a state in which the elastic member 24 is extended to eliminate wrinkles. (B) is a figure which shows the state in which the elastic member 24 shrink | contracted and the collar 30 is formed. FIG. 6: is a model expansion | deployment top view which shows the underpants type disposable diaper which is 2nd Embodiment of this invention. FIG. 7 is a schematic development plan view showing a pants-type disposable diaper according to the third embodiment of the present invention. FIG. 8: is a model expansion | deployment top view which shows the underpants type disposable diaper which is 4th Embodiment of this invention. FIG. 9 is a schematic view showing one embodiment of a method for producing a pant-type absorbent article of the present invention.

Hereinafter, the underpants type absorbent article of the present invention will be described based on preferred embodiments 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 FIG. 2, is a ventral-side exterior body 2A disposed on the wearer's ventral side, and the wearer's A back side exterior body 2B disposed on the back side, and an abdominal side exterior body 2A and an absorbent main body 3 fixed over the back side exterior body 2B, as shown in FIG. A pants-type disposable diaper 1 in which a body 2A and a backside exterior body 2B are connected in a ring shape.

The diaper 1 will be described in more detail.
The diaper 1 has a side seal part 4 formed by joining the abdominal exterior body 2A and the back exterior body 2B to both side edges 2a and 2b of the abdominal exterior body 2A and the back exterior body 2B. ing.
Further, as shown in FIG. 2, the ventral-side exterior body 2 </ b> A has a length La in the longitudinal direction of the absorbent article that is longer than a length L <b> 4 in the same direction of the side seal portion 4 and extends downward from the side seal portion 4. It has a ventral-side extension part 21a that goes out. Further, the back side exterior body 2B has a length Lb in the longitudinal direction of the absorbent article that is longer than the length L4 of the side seal part 4, and has a back side extension part 21b that extends downward from the side seal part 4. doing.

  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 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 (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 shown in FIG. 2, the ventral exterior body 2A and the back exterior body 2B have a pair of side edge portions 2a and 2a and a pair of side edge portions 2b and 2b with the elastic member 24 extended. Are preferably parallel to each other. Moreover, it is preferable that 2A of ventral | abdominal exterior bodies and the back | dorsal exterior body 2B are horizontally long rectangles in the state where the elastic member 24 is extended.
Note that the pair of side edge portions 2b and 2b may be non-parallel instead of parallel to each other, for example, from the end edge portion 2d of the ventral-side exterior body 2A or the back-side exterior body 2B. The distance between the pair of side edge portions may increase or decrease toward the end edge portion 2c, may decrease after being once expanded, or may be expanded after being once decreased.

  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 2 </ b> B is formed with an abdominal extension part 21 a and a back extension part 21 b that extend downward (downward when worn) from the side seal part 4.

  As shown in FIGS. 3 and 4, the abdominal exterior body 2 </ b> A and the back exterior body 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 arranged in a stretched state along the diaper lateral direction (Y direction) between the two sheets 22 and 23, respectively. It has a first belt-like stretchable region G2 and a second belt-like stretchable region G3.

The waist belt-like stretchable region G1 is outside the position of 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 exterior body 2A and the back exterior body 2B. (On the opening end side of the waist opening).
The first belt-like stretchable region G2 and the second belt-like stretchable region G3 are the longitudinal ends of the absorbent main body 3 in the longitudinal direction (X direction) of the diaper 1 in each of the ventral-side exterior body 2A and the back-side exterior body 2B. It is formed on the crotch C side from the position of the parts 3a, 3b, and the second belt-like stretchable region G3 is located on the crotch C side from the first belt-like stretchable region G2.
The waist belt-like stretchable region G1, the first belt-like stretchable region G2, and the second belt-like stretchable region G3 all stretch and contract in the lateral direction (Y direction) of the diaper 1 due to the presence of the elastic member 24.

  The abdominal exterior body 2A has a pair of end fixings in which the outer layer sheet 22 and the inner layer sheet 23 are bonded to both side edges 2a and 2a along the longitudinal direction (X direction) of the diaper 1 with an adhesive. It has a portion 27 (see FIG. 3). Similarly, the backside exterior body 2B is also joined to both side edges 2b, 2b along the longitudinal direction (X direction) of the diaper 1 between the outer layer sheet 22 and the inner layer sheet 23 via an adhesive. It has a pair of edge part fixing | fixed part 27 (refer FIG. 4).

  Further, as shown in FIGS. 3 and 4, the abdominal exterior body 2 </ b> A and the back exterior body 2 </ b> B are bonded between the outer layer sheet 22 and the inner layer sheet 23 between the pair of end fixing portions 27 and 27. It has a pair of 1st main body side fixing | fixed part 28,28 and a pair of 2nd main body side fixing | fixed part 29,29 joined via the agent. The pair of first main body side fixing portions 28, 28 are provided mainly corresponding to the first belt-like stretchable region G2, and the pair of second main body side fixing portions 29, 29 are mainly provided in the second belt-like stretchable region G3. Correspondingly provided. The first and second main body side fixing portions 28 and 29 are formed on the absorbent main body 3 side (Y direction center portion side) as compared with the end fixing portion 27 in the width direction of the diaper 1.

  As shown in FIG. 3 or FIG. 4, the waist belt-like stretchable areas G1 of the ventral and back side exterior bodies 2A and 2B are both end fixing portions 27 and 2 in the ventral side exterior body 2A and the back side exterior body 2B. 27 is formed so as to exhibit stretchability over the entire area. The waist belt-like stretchable region G <b> 1 has a plurality of elastic members 24 that continue between the pair of end fixing portions 27. The waist belt-like stretchable region G1 is cut along a region between the pair of first main body side fixing portions 28 and 28 together with the elastic member 24 continuous between the end fixing portions 27 and 27 and divided into left and right. You may have.

  The first belt-like stretchable regions G2 of the ventral and backside exterior bodies 2A, 2B are both between the end fixing portion 27 and the first main body side fixing portion 28 in the left and right of FIG. 3 or FIG. The elastic parts G22 and G22 extend and contract in the lateral direction of the diaper 1. On the other hand, a space between the first main body side fixing portions 28 is a non-stretchable portion G21 formed by cutting the elastic member 24.

  Similarly, the second belt-like stretchable region G3 of the ventral and backside exterior bodies 2A, 2B is between the end fixing part 27 and the second main body side fixing part 29 in each of the left and right of FIG. 3 or FIG. The elastic parts G32 and G32 extend and contract in the lateral direction of the diaper 1. On the other hand, a space between the second main body side fixing portions 29, 29 is a non-stretchable portion G31 formed by cutting the elastic member 24.

As shown in FIGS. 3 and 4, in the stretchable parts G22 and G22 in the waist belt-like stretchable region G1, the first beltlike stretchable region G2, and the stretchable portions G32 and G32 in the second beltlike stretchable region G3, the outer layer sheet 22 and The inner layer sheet 23 is joined at a large number of joints 26 formed in the form of dots.
More specifically, in each of the waist belt-like stretchable region G1, the stretchable portions G22 and G22, and the stretchable portions G32 and G32, the joint portion 26 is arranged in series in the lateral direction (Y direction) of the diaper 1. A plurality of rows of junction portions are formed at intervals in the longitudinal direction (X direction) of the diaper 1. Further, the positions in the Y direction of the respective joints in the lateral joint rows are also consistent in all the joint rows. In addition, a longitudinal junction row is formed in which the junctions 26 are arranged in series in the longitudinal direction (X direction) of the diaper 1, and the longitudinal junction row is spaced apart in the lateral direction (Y direction) of the diaper 1. A plurality of rows are formed.

  And in any of waist belt-like expansion-contraction area G1, said expansion-contraction part G22, G22, and said expansion-contraction part G32, G32, the some elastic member 24 is a junction part adjacent in the vertical direction (X direction) of the diaper 1, respectively. It is arranged to pass between 26. In addition, the elastic member 24 disposed in the waist belt-like stretchable region G1, the stretchable portions G22, G22 and the stretchable portions G32, G32 is a sheet in the end fixing portion 27 and the first and second main body side fixing portions 28, 29. While being fixed between 22 and 23, it is not being fixed to either of the sheets 22 and 23 in the other part.

  In each of the waist belt-like stretchable region G1, the stretchable portions G22, G22, and the stretchable portions G32, G32 in the diaper 1, the elastic members 24 contract, so that the sheets 22 and 23 between adjacent longitudinal joint rows are outside. The sheet 30 is deformed so as to swell toward each other, and a ridge 30 composed of the sheet 22 or the sheet 23 is generated between adjacent longitudinal joint rows, and the rim 30 and the ridge 30 are surrounded by the ridge 30 between the two sheets 22 and 23. A hollow portion 30 'is formed (see FIG. 5). By forming the heel 30 and the hollow portion 30 ′, the softness of the ventral exterior body 2 </ b> A and the back exterior body 2 </ b> B is improved to improve the touch and the like, and the heel 30 formed on the skin contact surface side. Air is easy to circulate between the bag 30 and the bag 30 and has excellent anti-dampness. 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.

The elastic member 24 disposed on the stretchable parts G22, G22 or the stretchable parts G32, G32 penetrates into the non-stretchable parts G21, 31 beyond the position of the first or second main body side fixing parts 28, 29. Yes. In this embodiment, the 1st or 2nd main body side fixing | fixed part 28 and 29 to which the elastic member 24 is fixed in the expansion | extension state is also a part of said expansion-contraction part G22, G22 or said expansion-contraction part G32, G32.
On the other hand, the elastic member that has entered the non-stretchable parts G21, 31 is at least one place, preferably a plurality of places, between the first main body side fixing parts 28, 28 or between the second main body side fixing parts 29, 29. It is cut, and the stretchability is not given to the non-stretchable portions G21 and G31. The elastic members in the non-stretchable parts G21 and 31 may be bonded to the sheet 22 and / or the sheet 23 in a state where the extended state is released. For example, cut pieces generated by cutting at a plurality of locations may be contracted while being weakly bonded to the sheet 22 or 23.

  Elastic members (not shown) in the non-stretchable parts G21, 31 are cut by being pressurized and / or heated at a number of locations dispersed in the longitudinal direction (X direction) and the width direction (Y direction) of the diaper 1. It is preferable. In the completed diaper 1 (pants-type absorbent article), a fusion point between constituent fibers in which the cut points (not shown) obtained by cutting the elastic member are generated in the sheets 22 and / or 23 in this manner. It remains as a thickened portion or a minute cut.

  As shown in FIGS. 3 and 4, in the diaper 1 of the first embodiment, each of the first belt-like stretchable regions G2 in the abdominal and dorsal exterior bodies 2A and 2B has a pair of side seal portions 4 and 4. It is formed in the abdominal exterior body body 20a and the back exterior body body 20b located between them, and the second belt-like stretchable areas G3 in the abdominal and back exterior bodies 2A, 2B are both side seal portions 4, 4 is formed in the abdominal extension part 21a and the back extension part 21b extending downward.

  In the diaper 1 of the first embodiment, as shown in FIG. 3, in the ventral exterior body 2A, the non-stretchable portion G21 of the first belt-shaped stretchable region G2 and the non-stretchable portion G31 of the second strip-shaped stretchable region G3, The lengths L1a and L2a in the diaper (absorbent article) lateral direction (Y direction) are different. Further, in the backside exterior body 2B, the length of the diaper (absorbent article) in the lateral direction (Y direction) between the non-stretchable portion G21 of the first belt-like stretchable region G2 and the non-stretchable portion G31 of the second strip-like stretchable region G3. L1b and L2b are different.

  As in the diaper 1 of the first embodiment, the length L1a is different from the length L2a in the ventral side exterior body 2A, and / or the length L1b and the length are different from each other in the back side exterior body 2B. By making the length L2b different, the degree of contraction and the balance of the degree of contraction of each of the first belt-like stretchable region G2 and the second belt-like stretchable region G3 can be easily changed as appropriate.

  Therefore, for example, according to the weight of the wearer, age (such as an infant or adult), sex, or a difference in body shape, etc., the first belt-like stretchable region G2 and Optimizing the appearance of the diaper in the vicinity of the crotch area by adjusting the balance of the degree of contraction of each of the second belt-like stretchable areas G3, the balance of the degree of shrinkage of the first and other belt-like stretchable areas G2 and G3 Therefore, it is possible to adjust the balance between the degree of contraction of each of the first belt-like stretchable area G2 and the second belt-like stretchable area G3 and the degree of shrinkage between the first belt-like stretchable area G2 and the second belt-like stretchable area G3. In addition, the type and thickness of the elastic member arranged in the first belt-like stretchable region G2 and the second belt-like stretchable region G3 may be different. Even if it is a case where it introduce | transduces between the sheets 22 and 23, it can be set as the above-mentioned according to a wearer's weight, age (an infant, an adult, etc.), sex, or the difference in a body shape by it.

In the diaper 1 of 1st Embodiment, as shown in FIG. 4, the 2nd strip | belt-shaped expansion-contraction area | region G3 in the back side exterior body 2B is formed in the back side extension part 21b, The 2nd strip | belt-shaped expansion / contraction area | region G3 The length L2b in the diaper lateral direction of the non-stretchable part G31 is longer than the length L1b in the diaper lateral direction of the non-stretchable part G21 in the first belt-like stretchable region G2.
Therefore, for example, in the first belt-like stretchable region G2, the back-side extending portion 21b is fitted in the Y direction in the second belt-like region G3 while fitting to the body and suppressing the displacement of the diaper 1 when contracted in the Y direction. Can be prevented from being greatly contracted, and excellent covering of the heel portion can be obtained while preventing the back-side extending portion 21b from being turned over.
In the diaper 1 of the first embodiment, the length L2b is preferably 105 to 200%, particularly 110 to 150% of the length L1b. In the example shown in FIG. 4, the length L <b> 1 b is substantially the same as the width of the absorbent main body 3, while the length L <b> 2 b is longer than the width of the absorbent main body 3. When the length L2b is longer than the width of the absorbent main body 3, it is possible to further suppress the absorber from shrinking in the Y direction and obtain a covering property of the groin side crotch portion, and prevent urine leakage at the time of going to bed. It becomes good.

Moreover, in the diaper 1 of the first embodiment, as shown in FIG. 3, the second belt-like stretchable region G3 in the ventral-side exterior body 2A is formed in the ventral-side extending portion 21a, and the second belt-like stretchable The length L2a in the diaper lateral direction of the non-stretchable part G31 in the region G3 is shorter than the length L1a in the diaper lateral direction of the non-stretchable part G21 in the first belt-shaped stretchable region G2.
Therefore, for example, the back-side extension part 21b is somewhat larger in the lateral direction of the diaper (Y direction) with respect to the abdominal-side extension part 21a while preventing the extension of the extension part 21b and the covering of the buttocks. By contracting, the ventral extension 21a can be deformed into a shape along the legs as shown in FIG. 1, improving fit and reducing gaps with the body. Do not give a sense of anxiety.

  In the diaper 1 of 1st Embodiment, it is preferable that the said length L2a is 5-95% of the said length L1a, especially 50-90%. In the example shown in FIG. 3, the length L <b> 1 a is substantially the same as the width of the absorbent main body 3.

  Moreover, in the diaper 1, it has the abdominal side and back side extension part 21a, 21b mentioned above in the abdominal side exterior body 2A and the back side exterior body 2B, and it mentioned above in the abdominal side and back side extension part 21a, 21b. Since the second belt-like stretchable region G3 is formed, when the diaper 1 is worn, the side edge portion 2a existing in the ventral side and back side extending portions 21a and 21b of the ventral side exterior body 2A and the back side exterior body 2B. 1b, as shown in FIG. 1 (b), it is divided into an abdominal side direction and a dorsal side direction so as to open along the legs, so that it is easy to wear and a downward concave edge along the legs is provided. Formed and excellent in appearance and fit.

  In addition, while the underpants type absorbent article of this invention does not have the abdominal side and / or back extension part 21a, 21b, it is the abdominal side and / or back side exterior body main body 20a, 20b similarly to the diaper 1. In addition, it may have first and second belt-like stretchable regions G2, G3. In that case, the length L2b in the backside exterior body 2B is longer than the length L1b, and in addition to that, the length L2a in the abdominal side exterior body 2A is shorter than the length L1a. For example, following the body shape improves fit and makes it easier to wear when wearing a diaper.

  The length L2a is preferably shorter than the length L2b from the viewpoint that the absorbent main body 3 fits more into the crotch portion and the absorption performance is improved.

The absorbent main body 3 in the diaper 1 has one end side in the longitudinal direction (portion overlapping the ventral exterior body 2A) fixed to the vicinity of the central portion in the Y direction of the ventral exterior body 2A via an adhesive, The other end side in the longitudinal direction (the portion overlapping the back side exterior body 2B) is fixed to the vicinity of the center portion in the Y direction of the back side exterior body 2B via an adhesive.
More specifically, the adhesion applied between the first belt-like stretchable region G2 of the ventral side exterior body 2A and the absorbent main body 3 so as to be substantially the same width as the width between the first main body side fixing portions 28, 28. Between the second belt-like stretchable region G3 of the abdominal exterior body 2A and the absorbent main body 3 and is coated to be approximately the same width as the width between the second main body side fixing portions 29, 29. Bonded with adhesive.

  The same applies to the backside exterior body 2B, and the space between the first belt-like stretchable region G2 of the backside exterior body 2B and the absorbent main body 3 is substantially the same width as the width between the first main body side fixing portions 28, 28. It is joined by the applied adhesive, and the width between the second belt-like stretchable region G3 of the backside exterior body 2B and the absorbent main body 3 is substantially the same as the width between the second main body side fixing portions 29, 29. It is joined by the adhesive applied to the surface.

Accordingly, in the ventral-side exterior body 2A, the first and second belt-like stretchable regions G2, G3 have a size relationship between the lengths L1a, L2a of the non-stretchable portions G21, G31 in the diaper lateral direction (Y direction) and the first or second The magnitude relationship of the length of the diaper horizontal direction (Y direction) of the junction part of 2nd strip | belt-shaped expansion-contraction area | region G2, G3 and the absorptive main body 3 corresponds.
Further, in the backside exterior body 2B, the first and second belt-like stretchable regions G2, G3 have a size relationship between the lengths L1b, L2b of the non-stretchable portions G21, G31 in the diaper lateral direction (Y direction) and the first or second The magnitude relationship of the length of the diaper horizontal direction (Y direction) of the junction part of 2nd strip | belt-shaped expansion-contraction area | region G2, G3 and the absorptive main body 3 corresponds.

  The coincidence of the magnitude relationships here is that the length L1a (L1b) of the non-stretchable part G21 of the first belt-like stretchable region G2 is the length L2a (or L2b) of the non-stretchable part G31 of the second beltlike stretchable region G3. In the case where it is longer, the length in the diaper lateral direction (Y direction) of the joint between the first belt-like stretchable region G2 and the absorbent main body 3 is the joint between the second belt-like stretchable region G3 and the absorbent main body 3. The length L1a (L1b) of the non-stretchable portion G21 of the first belt-like stretchable region G2 is longer than the length of the diaper lateral direction (Y direction), and the length of the non-stretchable portion G31 of the second beltlike stretchable region G3 When the length is shorter than the length L2a (or L2b), the length in the diaper lateral direction (Y direction) of the joint between the first belt-like stretchable region G2 and the absorbent main body 3 is the same as the second belt-like stretchable region G3 and the absorbent. It means that the length of the joint portion with the main body 3 is shorter than the length in the diaper lateral direction (Y direction).

In the diaper 1, since the space between the absorbent main body 3 and the abdominal exterior body 2A and / or the back exterior body 2B is fixed in this manner, the first belt-like stretchable region G2 and / or the first Since the stretchability of the stretchable portions G22 and G32 of the two-band stretchable region G3 is not easily disturbed even in the portion overlapping the absorbent main body 3, various effects as described above can be obtained more reliably.
This also applies to the second to fourth embodiments described later.

  The outer layer sheet 22 and the inner layer sheet 23 in the diaper 1 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. The folded-back portions 22a and 23a are joined to the portions of the side seal portion 4 where the outer layer sheet 22 and the inner layer sheet 23 are not folded, and the portions overlapping the longitudinal direction of the absorbent main body 3 are bonded to each other by an adhesive. It is joined to the surface of the absorbent main body 3 on the surface 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.

  6-8 is a figure which shows typically the underpants type disposable diaper of other embodiment of this invention. About the underpants type disposable diaper of 2nd-4th embodiment, a 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.6 and FIG.8, the same code | symbol is attached | subjected to the diaper component of 1st Embodiment.

  In the underpants type disposable diaper of 2nd Embodiment shown in FIG. 6, about the back side exterior body 2B, similarly to the diaper 1 of 1st Embodiment, the diaper horizontal direction of the non-stretchable part G31 of the 2nd strip | belt-shaped stretchable region G3 Length L2b is longer than the length L1b in the diaper lateral direction of the non-stretchable part G21 of the first belt-like stretchable region G2, while in the ventral exterior body 2A, the non-stretchable part of the second belt-like stretchable region G3 The diaper lateral length L2a of G31 is longer than the diaper lateral length L1a of the non-stretchable part G21 of the first belt-shaped stretchable region G2.

  According to the pants-type disposable diaper of the second embodiment, the back-side extension part 21b is prevented from turning over the extension part 21b and the covering of the buttocks, and the abdominal-side extension part 21a is The contraction force in the direction (Y direction) is reduced, skin troubles such as rubber marks on the skin can be prevented, and fit, ease of wearing, and ease of movement are improved. Moreover, since the extension part has expanded greatly, it becomes applicable also to a large sized person.

In the second embodiment, the length L2b is preferably 105 to 200%, particularly 110 to 150% of the length L1b, and the length L2a is 105 to 200% of the length L1a, particularly It is preferable that it is 110 to 150%. The length L2b is preferably 105 to 200%, particularly 110 to 150% of the length L1b, and the length L2a is 105 to 200%, particularly 110 to 150% of the length L1a. Is preferred.
Moreover, it is preferable that the length L2a is shorter than the length L2b from the point that the absorbent main body 3 fits more into the crotch portion and the absorption performance is improved.

  In addition, absorbent articles, such as a diaper, do not have the abdominal side and back side extension parts 21a and 21b, and the 1st and 2 belt-like stretchable areas G2 and G3 are the abdominal side and / or back side exterior body main body 20a, 20b, the length L2b in the backside exterior body 2B is longer than the length L1b, and the length L2a in the abdominal side exterior body 2A is longer than the length L1a. By following the body shape, the fit is improved and the diaper is easy to wear.

  In the pants-type disposable diaper of the third embodiment shown in FIG. 7, for the backside exterior body 2B, the length L2b in the diaper lateral direction of the non-stretchable part G31 of the second strip stretchable region G3 is the first strip stretchable region. While the length L1b in the diaper lateral direction of the non-expandable part G of G2 is shorter than the length L1b in the abdominal side exterior body 2A, the length L2a in the diaper lateral direction of the non-stretchable part G31 in the second belt-shaped stretchable region G3 is It is longer than the length L1a in the diaper lateral direction of the non-stretchable part G21 of the first belt-like stretchable region G2.

  According to the pants-type disposable diaper of the third embodiment, for example, even if the buttocks are slender and the thigh is thick, the dorsal extension portion 21b has a reduced turn of the extension portion 21b and a covering property of the buttocks. For the ventral extension part 21a, the contraction force in the diaper lateral direction (Y direction) is reduced, skin troubles such as rubber marks on the skin can be prevented, and fit and ease of wearing are improved. Moreover, since the abdominal-side extension part has expanded greatly, it is easy to move.

  In the third embodiment, the length L2b is preferably 5 to 95%, particularly 50 to 90% of the length L1b, and the length L2a is 105 to 200%, particularly 110, of the length L1a. It is preferable that it is -150%.

  In addition, absorbent articles, such as a diaper, do not have the abdominal side and back side extension parts 21a and 21b, and the 1st and 2 belt-like stretchable areas G2 and G3 are the abdominal side and / or back side exterior body main body 20a, When the length L2b in the back side exterior body 2B is shorter than the length L1b and the length L2a in the abdominal side exterior body 2A is longer than the length L1a. By following the body shape, the fit is improved and the diaper is easy to wear.

  In the pants-type disposable diaper according to the fourth embodiment shown in FIG. 8, the length L2b in the diaper lateral direction of the non-stretchable part G31 of the second belt-like stretchable region G3 is the first belt-like stretchable region. The diaper lateral length L1b of the non-expandable part G of G2 is shorter than the length L1b of the diaper in the lateral direction, and the diaper lateral length L2a of the non-stretchable part G31 of the second belt-shaped stretchable region G3 is It is shorter than the length L1a in the diaper lateral direction of the non-stretchable part G21 of the one-band stretchable area G2.

  According to the pants-type disposable diaper of the fourth embodiment, for example, even with a slender system, the back-side extension part 21b prevents the extension of the extension part 21b and the covering of the buttocks from being lowered, and the ventral side extension. With respect to the protruding portion 21a, the fitting property is improved by contracting to some extent in the diaper lateral direction (Y direction) and deforming the ventral side extending portion 21a into a shape around the leg as shown in FIG. In addition, since the gap between the inseam is reduced, the feeling of anxiety is not given.

  In the fourth embodiment, the length L2b is preferably 5 to 95%, particularly 50 to 90% of the length L1b, and the length L2a is 5 to 95%, particularly 50, of the length L1a. It is preferable that it is -90%.

  In addition, absorbent articles, such as a diaper, do not have the abdominal side and back side extension parts 21a and 21b, and the 1st and 2 belt-like stretchable areas G2 and G3 are the abdominal side and / or back side exterior body main body 20a, 20b, the length L2b in the backside exterior body 2B is shorter than the length L1b, and the length L2a in the abdominal side exterior body 2A is shorter than the length L1a. Can improve fit, prevent diaper misalignment, and fit slim body shape.

  From the viewpoint of ensuring that one or more of the above-described effects are more reliably exhibited, in each of the above-described embodiments, the length L1 ′ (see FIG. 3) of the first belt-shaped stretchable region G2 in the diaper longitudinal direction is It is preferably 5 to 95% of the length La of the ventral exterior body 2A or the length Lb (see FIG. 2) of the back exterior body 2B in the longitudinal direction (X direction) of the diaper, and the second belt-like stretchable region G3 It is preferable that length L2 '(refer FIG. 3) of the diaper vertical direction is 5-95% of said length La or Lb.

Moreover, when providing the abdominal side and / or back side extension part 21a, 21b in the abdominal side exterior body 2A and / or the back side exterior body 2B, the extension length of the abdominal side or the back side extension part 21a, 21b L5 and L6 are preferably 5 to 150% of the length L4 of the side seal portion 4, and more preferably 25 to 70%.
Further, from the same viewpoint, the extension length L5 of the ventral side extension portion 21a 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 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 a diaper 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 mm.

Next, the preferable embodiment of the manufacturing method of the underpants type absorbent article of this invention is demonstrated with reference to FIG.
In the manufacturing method of the present embodiment, as shown in FIG. 9, a wide strip sheet 122 that is a raw fabric of an outer layer sheet and a wide strip sheet 123 that is a raw fabric of an 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 belt-like sheet 122 and / or the belt-like sheet 123 are attached to the belt-like sheet 122 and / or the belt-like sheet 123 by an adhesive coating machine (not shown). The adhesive for forming 29 is intermittently applied, and the elastic member 24 is fixed between the belt-like sheets 122 and 123 at the fixing portions 27, 28, and 29 by pressurization by the nip roll 90. .

Next, the overlapped belt-like sheets 122 and 123 are sandwiched between a pressure roll 91 having a convex portion for forming the joint 26 on the peripheral surface, and an anvil roll 92 disposed opposite to the pressure roll 91. By introducing and partially pressurizing and heating, a large number of the joints 26 described above are formed. Furthermore, the belt-like sheets 122 and 123 with the elastic member 24 sandwiched between them are a convex roll 93 having a convex portion for cutting the elastic member 24 on the peripheral surface, and an anvil roll 94 disposed opposite to the convex roll 93. In between the first and second belt-like stretchable regions G1 and G2 of the first and second belt-like stretchable regions G1 and G2 by being partially pressurized and / or heated. The elastic member 24 is cut at a corresponding portion.
The convex roll 93 used in the cutting step of the elastic member 24 forms a portion that forms the non-stretchable portion G21 of the first belt-like stretchable region G2 and the non-stretchable portion G31 of the second belt-like stretchable region G3. The distribution length of the convex part for cutting the elastic member 24 in the roll circumferential direction differs depending on the part. In addition, the elastic member 24 is cut in the roll circumferential direction by the portion forming the non-stretchable portion G21 of the first belt-like stretchable region G2 and the portion forming the non-stretchable portion G31 of the second beltlike stretchable region G3 of the backside exterior body 2B. The distribution length (measured along the circumferential direction of the roll) of the convex portions for use is different. In addition, formation of the junction part 26 and cutting | disconnection of the elastic member 24 can also be performed using the same roll.

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 95. At the time of the division, both the belt-like sheets 122 and 123 are divided into a portion that becomes the second belt-like stretchable region G3 of the ventral side exterior body and a portion that becomes the second belt-like stretchable region G3 of the backside exterior body. To.
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.

  Moreover, although the division | segmentation of both the strip | belt-shaped sheets 122 and 123 may be performed so that the junction part 26 may not be cut | disconnected, the several junction part 26 located in a line with the flow direction (MD) of both the strip | belt-shaped sheet | seats 122 and 123, respectively. It is also preferable to carry out the process so as to be divided into two in the direction (CD) perpendicular to the flow direction. The small joints generated by the splitting of the joint part 26 are arranged on the end edge part 2c on the crotch part 3 side of the abdominal and back side exterior bodies 2A, 2B, so that the hollow part 30 'is formed in the end edge part 2c. It comes to open stably, the air | flow circulation property improves through the recessed part between hollow part 30 'or the ridges 30, and a dampening prevention property and a feeling of mounting improve. The joint portion 26 may be divided into two equal parts, but may not be divided into two equal parts. Further, it is preferable that the splitting of the joint portion 26 is performed so that the length in the CD direction of each small joint portion generated by the splitting is 0.5 mm or more, more preferably 2 mm or more.

  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 direction of the pressure roll 91 and the like used before the division can be shortened because the continuum is separated after being pressurized.

  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 above-described ventral and dorsal extending portions 21a and 21b 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 main 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.

According to the method of this embodiment, the length of the non-stretchable part G21 of the first belt-like stretchable region G2 and the non-stretching of the second belt-like stretchable region G3 in the ventral and / or backside exterior bodies 2A, 2B are thus made. Diapers having different lengths of the stretchable parts G31 can be easily and efficiently manufactured.
Moreover, according to the method of this embodiment, since it can manufacture without removing the trim for leg opening part formation from the strip | belt sheets 122 and 123 for exterior body formation, it is required for the removal and reuse of a trim. It can be manufactured efficiently and economically without a process. In addition, because trim does not occur, it is environmentally friendly.

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, the pant-type absorbent article in the present invention may not have a ventral extension part or a dorsal extension part, and does not have both a ventral extension part and a dorsal extension part. There may be.

  In addition, the ventral exterior body 2A or the back exterior body 2B is provided with first and second belt-shaped stretchable areas G2, G3 in which the lengths of the non-stretchable parts G21, G31 are different from each other, The side exterior body 2A may not be provided with a belt-like stretchable region having such a non-stretchable portion. In addition, the ventral exterior body 2A or the back exterior body 2B is provided with first and second belt-shaped stretchable areas G2, G3 in which the lengths of the non-stretchable parts G21, G31 are different from each other, The side exterior body 2A has a belt-like stretchable region having a non-stretchable portion having the same length in the diaper width direction between the end in the longitudinal direction of the absorbent main body 3 and the edge on the crotch side in the diaper longitudinal direction. It can also be formed over the entire area.

  Further, the stretchable portions G22 and G22 in the waist belt-like stretchable region G1, the stretchable portions G32 and G32 in the second beltlike stretchable region G3, etc. are not provided with the joint portion 26 as shown in FIG. It may be one in which the elastic member 24 is fixed between the outer layer sheet 22 and the inner layer sheet 23 that are bonded to the entire surface. Moreover, like the diaper 1, when joining between the outer layer sheet 22 and the inner layer sheet | seat 23 in the junction part 26, the junction part 26 may be formed in the planar view zigzag pattern etc.

  Moreover, the edge part fixing | fixed part 27 in the diaper 1 has a certain amount of distance (for example, clearance more than 0 mm and 20 mm or less) between the edge of the ventral side exterior body 2A or the back side exterior body 2B in the diaper width direction (Y direction). May be formed.

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 Abdominal side exterior body 2a, 2a Side edge portion 21a Abdominal side extension portion 2B Back side exterior body 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 surface sheet 33 Absorbent core 34 Side cuff 4 Side seal part 5 Waist opening part 6 Leg opening part A Abdominal side part B Back side part C Crotch part G1 West belt-like stretchable area G2 1st belt-like stretchable area G21 Non-stretchable part G21 Stretchable part G3 Second belt stretchable area G31 Non-stretchable part G32 Stretchable part

Claims (4)

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 absorbent main body fixed over the abdomen and the back exterior body The pant-type absorbent article in which the ventral exterior body and the back exterior body are connected in an annular shape,
A first belt-like stretchable region extending and contracting in the lateral direction of the absorbent article from the position of the longitudinal end portion of the absorbent main body in each of the abdominal exterior body and the back exterior body, and the crotch part from the first belt-shaped stretchable region It has a second belt-like stretchable region that is located on the side and stretches in the lateral direction of the absorbent article,
Each of the first and second belt-like stretchable areas is formed by extending an elastic member between two sheets constituting the abdominal or dorsal exterior body, and overlapping the absorbent main body. It has a non-stretchable part formed by cutting the elastic member, and has a pair of stretchable parts on both sides thereof,
The length of the non-stretchable part of the non-stretchable part of the second belt-shaped stretchable region is the length of the non-stretchable part of the non-stretchable part of the first belt-shaped stretchable region in the lateral direction of the absorbent article Longer than
The absorbent article lateral length of the non-stretchable portion of the second belt-like stretchable region of the ventral exterior body is shorter than the lateral length of the non-stretchable portion of the second belt-like stretchable region of the backside exterior body. , Pants-type absorbent articles. The side seal portions are formed by joining the side edges of the abdominal exterior body and the back exterior body along the longitudinal direction of the absorbent article, and the abdominal exterior body and the back exterior body are each absorbent. The length in the longitudinal direction of the article is longer than the length of the side seal part, and each has an extending part extending downward from the side seal part,
The pants-type absorbent article according to claim 1 , wherein the second belt-like stretchable region is provided in the extended portion. In the ventral and / or backside exterior body, the first and second belt-like stretchable areas are the size relationship of the lengths of the non-stretchable parts in the transverse direction of the absorbent article, and the first or second belt-like stretchable area and the absorbent main body. The underpants type absorbent article according to claim 1, wherein a size relationship of the length in the lateral direction of the absorbent article coincides with the joint portion. The method of manufacturing a pants-type absorbent article according to any one of claim 1 to 3
Two belt-like sheets that are the raw fabric of the ventral side and the back-side exterior body are superposed in a state in which an elastic member is interposed therebetween, and both the superposed belt-like sheets are projected on the peripheral surface for cutting the elastic member. Non-stretchable portions of the first and second belt-like stretchable regions of the ventral side and the backside exterior body are introduced between a convex roll having a portion and another roll disposed opposite to the convex roll. An elastic member cutting step that cuts at a portion corresponding to the step, and after the elastic member cutting step, a split step that cuts and divides the two belt-like sheets into an abdominal exterior body portion and a back exterior body portion. Manufacturing method of absorbent article.

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