TW201328681A - Pants-type absorbent article - Google Patents

Abstract

A nappy (1) of the present invention is provided with a stomach-side sheet member (2A), a back-side sheet member (2B) and an absorbent main body (3), and side edge parts (2a, 2b) of both sheet members (2A, 2B) are joined to form a pair of side sealing parts (4). The stomach-side sheet member (2A) and the back-side sheet member (2B) have extension parts (21a, 21b) which extend below the side sealing parts (4). A plurality of elastic members (24) are positioned in an extended state along the X direction of the extension parts (21a, 21b), and the extension parts (21a, 21b) are extendible in the X direction. When the nappy (1) is in a contracted state, the extension part (21a) of the stomach-side sheet member (2A) is narrower than the extension part (21b) of the back-side sheet member (2B).

Description

Pants type absorbent article

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

Conventionally, as a pants-type absorbent article, a pants-type absorbent article is known in which an outer covering material is divided into a belly sheet member disposed on the ventral side of the wearer and a back disposed on the back side of the wearer. The side sheet member is fixed in such a manner as to be stretched over the front side sheet member and the back side sheet member, and the left and right side portions of the front side sheet member and the left and right side portions of the back side sheet member are Engage.

For example, as such a pants-type absorbent article, Patent Documents 1 and 2 disclose a pull-on garment having an endless elastic band including a front belt portion and a rear belt portion, and an absorbent body, and a rear belt portion. The longitudinal length of the (back side sheet member) is longer than the longitudinal length of the front belt portion (ventral sheet member).

Further, the present applicant has proposed a pants-type absorbent article in which an extension portion extending further downward than the side seal portion is provided in each of the front side sheet member and the back side sheet member, and the extension portion is at the article width. The direction is flexible.

Patent Document 1: Japanese Patent Laid-Open Publication No. 2008-508082

Patent Document 2: Japanese Patent Laid-Open No. 2011-25006

The pull-on garment of Patent Document 1 has a buttock covering portion extending further downward than the side seal portion, and the buttock covering portion is also stretchable, so that the lower end portion of the side seal portion is strongly pulled toward the rear belt portion. Side, easy to be in front The lower end of the belt portion is tightened. Therefore, the lower end of the front belt portion strongly contacts the groin portion on the front side of the wearer, and the wearer's skin leaves an impression or feels that the leg is difficult to move.

On the other hand, when both the front side sheet member and the back side sheet member are extended downward from the side seal portion, the difference in the form of the front side sheet member and the back side sheet member becomes small, and It is difficult to visually identify the diaper before and after.

Accordingly, the present invention relates to a pants-type absorbent article which is easy to distinguish before and after wearing, and which is difficult to leave an impression on the groin portion of the wearer when worn.

The present invention relates to a pant-type absorbent article comprising a belly sheet member disposed on a ventral side of a wearer, a back side sheet member disposed on a back side of the wearer, and erected and fixed to the ventral sheet member a member and a lengthwise absorbent body on the back side sheet member. In the pants-type absorbent article of the present invention, the side edge portions of the front side sheet member are joined to both side edges of the back side sheet member to form a pair of side seal portions, a waist opening portion and a pair of legs. Part opening. In the present invention, there is provided a pants-type absorbent article, wherein the front side sheet member and the back side sheet member respectively comprise an extension portion extending further downward than the side seal portion, and the plurality of elastic members are elongated in a lateral direction Disposed on each of the extending portions such that each of the extending portions has a stretchability in a lateral direction, and in a state of being contracted, a width of the extending portion of the front side sheet member is larger than a width of the extending portion of the back side sheet member The width is narrow.

Hereinafter, the pants-type absorbent article of the present invention will be described with reference to the drawings based on preferred embodiments thereof.

As shown in FIG. 1 and FIG. 3, the pants-type disposable diaper 1 (hereinafter also referred to as a diaper 1) according to an embodiment of the present invention includes a front side sheet member 2A disposed on the front side of the wearer, and is disposed. a back side sheet member 2B on the back side of the wearer, and an elongated absorbent body 3 that is stretched and fixed to the front side sheet member 2A and the back side sheet member 2B, and two of the front side sheet members 2A The side edge portions 2a and 2a are joined to the side edge portions 2b and 2b of the back side sheet member 2B, and a pair of side seal portions 4 and 4, a waist opening portion 5, and a pair of leg portion openings 6 and 6 are formed.

As shown in FIG. 3, the length Z of the longitudinal direction X of the diaper sheet member (ABS) is longer than the length L4 of the side seal portion 4 in the same direction, and has a lower direction than the side seal portion 4 (wearing Below the time) the extended ventral extension 21a. Further, the back side sheet member 2B is also a length L4 in which the longitudinal direction Xb of the diaper (absorbent article) is longer than the same direction of the side seal portion 4, and has a lower direction than the side seal portion 4 (below when worn) The extended back side extension 21b.

More specifically, as shown in FIGS. 1 and 3, the diaper 1 includes a front side portion A disposed on the front side of the wearer when worn, a back side portion B disposed on the back side of the wearer, and The crotch portion C is disposed between the abdominal side portion A and the back side portion B and disposed below the crotch portion of the wearer. The longitudinal direction of the diaper (absorbent article) 1 is from the ventral side A through the crotch portion C to the direction of the back side portion B or the reverse direction thereof (X direction in FIG. 3), and the diaper (absorbent article) 1 The transverse direction is the direction along the abdominal direction of the wearer and is the direction intersecting the longitudinal direction of the diaper (absorbent article) 1 (Y direction in Fig. 3).

As shown in FIG. 3, the absorbent body 3 of the diaper 1 includes a liquid-permeable front sheet 31, a liquid-impermeable or water-repellent back sheet 32, and a liquid disposed between the two sheets 31 and 32. Retaining absorbent body 33, and forming It is a long rectangular shape in the X direction. The absorber 33 includes an absorbent core containing an aggregate of fibers such as pulp fibers (which may also be a non-woven fabric) or an absorbent core in which particles of the water-absorbent polymer are held, and coated with the absorbent core A core wrap sheet (not shown) of the absorbent core. The absorber 33 is also formed in a rectangular shape that is long in the X direction. The absorber 33 has a material for forming the absorptive core or a low-rigidity portion 33d having a smaller basis weight than the other portions in the longitudinal direction. Each of the low rigidity portions 33d is formed to be long in the X direction. Since the absorber 33 is easily bent in the low-rigidity portion 33d, when the diaper is worn, the both sides of the absorber 33 or the absorbent body 3 are liable to stand up toward the skin side of the wearer.

As shown in Fig. 3, side cuffs 34, 34 of a material containing liquid resistance or water repellency and gas permeability are formed on both sides of the absorbent body 3 along the longitudinal direction. A side flange elastic member 35 is disposed in an extended state in the vicinity of the free ends of the side flanges 34. During the wearing of the diaper 1, the side flange 34 is raised by the side flange elastic member 35, thereby preventing the liquid from flowing out of the absorbent body 3 in the lateral direction (Y direction). As the absorbent core or the core wrapping sheet of the front sheet 31, the back sheet 32, and the absorbent body 33, the same materials as those previously used for such an absorbent article can be used, respectively. An outer sheet such as a nonwoven fabric or a film may be placed on the outer side of the absorbent body 3 so as to be superposed on the back sheet 32.

The ventral sheet member 2A is formed in a horizontally long rectangular shape in a state in which the diaper 1 is unfolded and stretched (see FIG. 3), and includes a pair of left and right side edge portions 2a along the longitudinal direction (X direction) of the diaper. 2a, and a pair of end edge portions 2c, 2d (upper end edge portion 2c, lower end edge portion 2d) in the lateral direction (Y direction) of the diaper. The back side sheet member 2B is also formed into a horizontally long rectangular shape, and includes a pair of left and right side edge portions 2b, 2b along the longitudinal direction (X direction) of the diaper, and a top and bottom direction (Y direction) along the diaper. A pair of end edge portions 2c, 2d. As shown in Fig. 3, the front side sheet member 2A and the back side sheet member 2B have the same shape and the same size, and the length of the diaper in the longitudinal direction (X direction) is uniform, and the length of the diaper in the lateral direction (Y direction) is also uniform.

Further, as shown in FIG. 3, the side sheet members 2A are formed on the side edge portions 2a and 2a, respectively, and the front side sheet member 2A and the back side sheet member 2B are joined to each other to form a side seal portion 4. a joint portion 2a'; and a non-joining portion 2a" extending below the joint portion 2a' and not joined between the front side sheet member 2A and the back side sheet member 2B. Further, the back side sheet member 2B is also Similarly, as shown in FIG. 3, the side edge portions 2b and 2b respectively include a joint portion 2b' in which the back side sheet member 2B and the front side sheet member 2A are joined to each other to form the side seal portion 4; A non-joining portion 2b" that extends below the joint portion 2b' and that is not joined between the back side sheet member 2B and the front side sheet member 2A. Further, the joint portion 2a' which is a part of the side edge portion 2a of the front side sheet member 2A is joined to the joint portion 2b' which is a part of the side edge portion 2b of the back side sheet member 2B, and the diaper is 1 is formed with the pair of side seal portions 4, 4 described above. At the time of this joining, for example, a known joining method such as heat sealing, high-frequency sealing, ultrasonic sealing, or an adhesive is used. Further, as shown in FIG. 1, the waist opening portion 5 and the pair of leg opening portions 6, 6 are formed together with the side seal portions 4, 4 by the joining.

As shown in FIG. 3, the abdominal sheet member 2A has an extending portion 21a that extends further downward than the side seal portion 4. Hereinafter, the abdominal sheet member 2A includes a body portion 20a located between the joint portions 2a' and 2a' (hereinafter, referred to as a belly body) The portion 20a) and a rectangular extending portion 21a (hereinafter also referred to as a front side extending portion 21a) extending below the main body portion 20a (on the lower jaw portion C side).

Similarly, as shown in FIG. 3, the back side sheet member 2B has an extension portion 21b that extends further downward than the side seal portion 4. Hereinafter, the back side sheet member 2B also includes a main body portion 20b (hereinafter referred to as a back side main body portion 20b) located between the joint portions 2b' and 2b', and a lower portion (bottom portion) of the main body portion 20a. The C side) extends the rectangular extension 21b (hereinafter also referred to as the back extension 21b).

The joint portion 2a' and the non-joining portion 2a" of the side edge portion 2a of the front side sheet member 2A are continuous in the longitudinal direction (X direction) of the diaper in the developed and stretched state of the diaper (see Fig. 3). Further, the joint portion 2b' and the non-joining portion 2b" of the side edge portion 2b of the back side sheet member 2B are also in the expanded and stretched state of the diaper (refer to FIG. 3) in the longitudinal direction of the diaper ( Extending continuously in the X direction). In Fig. 7, the waist portion 7a of the infant is inserted into the waist opening portion 5 and the leg portions 7b, 7b of the child are inserted into the leg openings 6, 6.

As shown in Fig. 3, the absorbent body 3 is fixed to the front side body portion of the front side sheet member 2A via an adhesive by one end portion 3a side (the portion overlapping the front side sheet member 2A) in the longitudinal direction (X direction). The central portion of the lateral direction (Y direction) of the extending portion 21a and the extending portion 21a, and the other end portion 3b side (the portion overlapping the back side sheet member 2B) in the longitudinal direction (X direction) is fixed to the back side sheet member 2B via an adhesive. The central portion of the back side main body portion 20b and the extending portion 21b in the lateral direction (Y direction). The diaper 1 is described in detail. As shown in FIG. 3, in the diaper 1, one end portion 3a side of the absorbent main body 3 is fixed to the front side fixing portion 8A of the front side sheet member 2A via an adhesive, and The ventral fixation portion 8A is divided into an absorbent body 3 and The front side body fixing portion 80a of the front side body portion 20a of the front side sheet member 2A is fixed via an adhesive, and the ventral side portion of the absorbent body 3 and the extension portion 21a of the front side sheet member 2A is fixed via an adhesive. The fixing portion 81a. Further, as shown in FIG. 3, in the diaper 1, the other end portion 3b side of the absorbent main body 3 is fixed to the back side fixing portion 8B of the back side sheet member 2B via an adhesive, and the back side fixing portion 8B. The back side body fixing portion 80b which is divided into the absorbent body 3 and the back side body portion 20b of the back side sheet member 2B via the adhesive, and the extension portion 21b of the absorbent body 3 and the back side sheet member 2B are passed through The back side extending fixing portion 81b is fixed by the agent. Further, the front side fixing portion 8A and the back side fixing portion 8B are formed by fixing the adhesive, but they may be formed by a known fixing method such as heat sealing, high frequency sealing, or ultrasonic sealing.

The fixing position of the absorbent main body 3 and the front side sheet member 2A and the fixing position of the absorbent main body 3 and the back side sheet member 2B will be described in detail, from the viewpoint of easily recognizing the diaper before wearing, Preferably, the width (L8a) of the absorbent body 3 and the front side fixing portion 8A of the front side sheet member 2A is formed to be wider than the width of the back side fixing portion 8B of the absorbent body 3 and the back side sheet member 2B (L8b). narrow. Here, the width (L8a) of the front side fixing portion 8A refers to the length of the diaper 1 in the lateral direction (Y direction) in the front side main body fixing portion 80a and the front side extension fixing portion 81a constituting the front side fixing portion 8A. The width of the longest position. The width (L8b) of the back side fixing portion 8B is also the same as the width (L8a) of the front side fixing portion 8A, and refers to the back side body fixing portion 80b and the back side extension fixing portion 81b constituting the back side fixing portion 8B. The width of the longest position in the lateral direction (Y direction) of the sheet 1.

Further, the above fixed position will be described in detail, and the same is true. In view of the above, it is preferable that at least the absorbent body 3 and the abdominal sheet member 2A of the front side fixing portion 8A are the same as the width (L8a) of the front side fixing portion 8A and the width (L8b) of the back side fixing portion 8B. The width (L81a) of the front side extension fixing portion 81a of the extending portion 21a is formed to be wider than the width of the back side extending fixing portion 81b of the absorbent body 3 of the back side fixing portion 8B and the extending portion 21b of the back side sheet member 2B ( L81b) is narrow; and it is preferably the entire region of the ventral extension fixing portion 81a and the entire region of the back extension extending portion 81b, and the ventral extension fixing portion 81a, from the viewpoint of more effectively distinguishing the appearance before wearing. The width (L81a) is formed to be narrower than the width (L81b) of the back side extension fixing portion 81b. Here, the width (L81a) of the front side extension fixing portion 81a is the width of the position where the length of the diaper 1 in the lateral direction (Y direction) is the longest in the front side extension fixing portion 81a. The width (L81b) of the back side extension fixing portion 81b is also the same as the width (L81a) of the front side extension fixing portion 81a, and the length of the diaper 1 in the lateral direction (Y direction) is the longest in the back side extension fixing portion 81b. The width of the location.

In the diaper 1, as shown in FIG. 3, the front body fixing portion 80a and the back side body fixing portion 80b are formed between the outer edges of the absorbent body 3 along the longitudinal direction (X direction), respectively, on the back side. The extension fixing portion 81b is formed between the free ends of the side flanges 34, 34, and the front side extension fixing portion 81a is formed on the inner side of the free ends of the side flanges 34, 34. As described above, in the diaper 1, as shown in FIG. 3, the width (L8a) of the front side fixing portion 8A is the same as the width (L8b) of the back side fixing portion 8B, but the width of the front side extending fixing portion 81a (L81a) It is formed to be narrower than the width (L81b) of the back side extension fixing portion 81b.

The extending portion 21a of the front side sheet member 2A and the extending portion 21b of the back side sheet member 2B are respectively elongated in the lateral direction (Y direction) as shown in FIG. The plurality of elastic members 24 are disposed such that the extending portions 21a and 21b are stretchable in the lateral direction (Y direction). As will be described in detail below, as shown in FIGS. 4 and 5, the front side sheet member 2A and the back side sheet member 2B of the diaper 1 are provided with an outer layer sheet 22 constituting the outer surface of the diaper and disposed on the outer layer sheet 22. The inner layer sheet 23 on the inner surface side and the plurality of linear elastic members 24 disposed between the two sheets 22 and 23 are formed in the lateral body portion 20a and the back side body portion 20b, respectively. The lumbar stretchable portion G1 and the abdominal stretchable portion G2 having the stretchability in the (Y direction) are formed with an elastically stretchable extension portion in the lateral direction (Y direction) in the front side extension portion 21a and the back side extension portion 21b. G3.

As the outer layer sheet 22 and the inner layer sheet 23, various sheet materials previously used in such articles can be used without particular limitation, but are preferably non-woven fabrics, and particularly preferably from the viewpoint of flexibility and the like, A single-layer non-woven fabric such as air through nonwoven fabric, heat rolled nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, or two or more laminated non-woven fabrics. Further, it may be a sheet obtained by integrating these nonwoven fabrics with a film. As the material for forming the elastic member 24, various known elastic materials used in absorbent articles such as disposable diapers or menstrual napkins can be used without particular limitation. Examples of the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and chloroprene rubber, natural rubber, EVA (Ethylene Vinyl Acetate, ethylene vinyl acetate), and stretchable polyolefin. , polyurethane, and the like. As the form of the elastic member, a linear shape (rubber line or the like) or a belt shape (flat rubber or the like) having a rectangular shape, a square shape, a circular shape, a polygonal shape, or the like, or a linear type of a multifilament type can be preferably used. .

As shown in FIGS. 4 and 5, the waist stretchable portion G1 is formed in the longitudinal direction (X direction) of the diaper 1 in each of the front sheet member 2A and the back sheet member 2B. The end portions 3a and 3b in the longitudinal direction are further outward in the longitudinal direction (X direction). The abdominal contraction portion G2 is formed in the longitudinal direction (X direction) of the diaper 1 in the longitudinal direction (X direction) of the waist portion expansion portion G1 and the ventral side extension portion 21a or the back side in each of the abdominal sheet member 2A and the back side sheet member 2B. Between the extensions 21b. The extension portion expansion and contraction portion G3 is formed in the front side extension portion 21a or the back side extension portion 21b.

As shown in Fig. 3, the front side body portion 20a as the body portion of the front side sheet member 2A, the back side body portion 20b as the body portion of the back side sheet member 2B, and the extension of the front side sheet member 2A In each of the front side extension portion 21a of the portion and the back side extension portion 21b as the extension portion of the back side sheet member 2B, the plurality of elastic members 24 extend in the lateral direction (Y direction) to the diaper The longitudinal direction (X direction) is spaced apart and arranged in an elongated state.

More specifically, as shown in FIG. 4, the abdominal sheet member 2A is provided with a plurality of elastic members 24A on the waist elastic-contraction portion G1 of the front side main body portion 20a, and a web-extending portion G2 of the front body portion 20a. A plurality of elastic members 24B are disposed, and a plurality of elastic members 24C are disposed in the extension portion expansion and contraction portion G3 of the abdominal extension portion 21a.

On the other hand, as shown in FIG. 5, the back side sheet member 2B is provided with a plurality of elastic members 24D on the waist elastic-contraction portion G1 of the back side main body portion 20b, and is disposed in the abdominal stretchable portion G2 of the back side main body portion 20b. A plurality of elastic members 24E are provided, and a plurality of elastic members 24F are disposed on the extending portion of the extension portion 21b of the back side extension portion 21b.

In the diaper 1, the extension portion 21a of the ventral sheet member 2A and the back side sheet structure The extending portion 21b of the member 2B has a weakly functionalized region in which the elastic member 24 has a reduced expansion and contraction function in a region overlapping the absorbent body 3. As described in detail, the abdominal sheet member 2A is fixed to the center portion of the lateral direction (Y direction) via the adhesive in a state in which the abdominal stretchable portion G2 and the extended stretchable portion G3 are respectively stretched and stretched, and the absorbent body is fixed. 3. Further, the plurality of linear elastic members 24B of the abdominal stretchable portion G2 overlapping the absorbent body 3 and the plurality of linear elastic members 24C of the extended portion stretchable portion G3 overlapping the absorbent body 3 are each divided into The plurality of elastic members 24B and 24C which are divided into finer portions have a weakly functionalized region in a state in which they have almost no contraction force. Similarly, in the back side sheet member 2B, the absorbent body 3 is fixed to the center portion in the lateral direction (Y direction) via the adhesive in a state where the abdominal stretchable portion G2 and the extended portion stretchable portion G3 are respectively developed and extended. Further, the plurality of linear elastic members 24E of the abdominal stretchable portion G2 overlapping the absorbent body 3 and the plurality of linear elastic members 24F of the extended portion stretchable portion G3 overlapping the absorbent body 3 are each divided into The plurality of elastic members 24E and 24F which are divided into finer portions have a weakly functionalized region in a state in which they have almost no contraction force.

Since the weakly functionalized region is formed as described above, as shown in FIGS. 4 and 5, in the diaper 1, the waist stretchable portion G1 extends over the end portion of the front side sheet member 2A or the back side sheet member 2B. The entire region between the fixing portions 27 and 27 is formed to exhibit stretchability. On the other hand, the abdominal stretchable portion G2 and the extended portion stretchable portion G3 are formed in the lateral direction (Y direction) of the diaper 1, respectively. Each of the side edges 3c, 3c of the body 3 in the longitudinal direction (X direction) is located further in the lateral direction (Y direction). In other words, the abdominal expansion and contraction portion G2 and the extension portion The constricted portion G3 exhibits stretchability in the lateral direction (Y direction) of the both side edges 3c, 3c of the absorbent body 3, and in the portion overlapping the absorbent body 3, particularly in the lateral direction of the absorbent body 3 (Y The portion in which the central portion overlaps in the direction is difficult to exhibit stretchability, and is formed in a state in which the diaper 1 is divided into right and left.

Moreover, the elastic members 24A and 24B disposed on the front side main body portion 20a of the front side sheet member 2A, the elastic members 24D and 24E disposed on the back side main body portion 20b of the back side sheet member 2B, and the rear side extension are disposed. The elastic members 24F of the portion 21b are disposed at equal elongations to each other. The elongation of the elastic member 24C of the abdominal extension portion 21a will be described in detail below.

In the waist stretchable portion G1, the abdominal stretchable portion G2, and the extended portion stretchable portion G3 of the diaper 1 of the present embodiment, as shown in FIGS. 4 and 5, the outer layer sheet 22 and the inner layer sheet 23 are formed. The plurality of joint portions 26 are joined in a distributed manner.

More specifically, in any of the stretchable portions G1 to G3 of the front side sheet member 2A and the back side sheet member 2B, a plurality of rows of joint portions are formed in the longitudinal direction (X direction) of the diaper 1 The plurality of row joint portion line joint portions 26 are arranged in series in the lateral direction (Y direction) of the diaper 1 . Further, the positions of the respective joint portions in the joint row in the Y direction coincide with each other in all the joint portions. Further, in the longitudinal direction (X direction) of the diaper 1, a longitudinal joint portion in which the joint portions 26 are arranged in series is formed, and the longitudinal joint portion is spaced apart in the lateral direction (Y direction) of the diaper 1 And there are multiple lines formed.

Further, in any of the stretchable portions G1 to G3 of the front side sheet member 2A and the back side sheet member 2B, the plurality of elastic members 24 are disposed so as to pass between the joint portions 26 adjacent in the longitudinal direction. Moreover, each elastic member 24 is The end fixing portion 27 or the absorbent main body side fixing portion 28 is fixed between the sheets 22 and 23, and is not fixed to any of the sheets 22 and 23 at the other portions.

The waist stretch portion G1 of the front side sheet member 2A is joined to the side edge portions 2a, 2a of the front side sheet member 2A, and has one end portion joined between the outer layer sheet 22 and the inner layer sheet 23 via an adhesive. The fixing portion 27 (see Fig. 4). The elastic member 24A disposed on the waist elastic portion G1 is fixed between the sheets 22 and 23 in each of the pair of end fixing portions 27, and is not fixed to the sheet 22 between the end fixing portions 27. 23 of any. The waist stretchable portion G1 of the back side sheet member 2B is also the same (see FIG. 5).

Each of the abdominal stretchable portions G2 of the front side sheet member 2A is at one side edge portion of the front side sheet member 2A, and has an end portion fixing portion 27 that is joined between the outer layer sheet 22 and the inner layer sheet 23 via an adhesive. Further, the end portion fixing portion 27 is located on the center side in the lateral direction of the diaper, and has an absorbent main body side fixing portion 28 that is joined between the outer layer sheet 22 and the inner layer sheet 23 via an adhesive (see FIG. 4). . The elastic member 24B disposed in the abdominal stretchable portion G2 is fixed between the sheets 22 and 23 in each of the end fixing portion 27 and the absorbent body fixing portion 28, and is fixed at the end fixing portion 27 and absorbed. The main body side fixing portions 28 are not fixed to any of the sheets 22 and 23. The extension portion expansion and contraction portion G3 of the front side sheet member 2A, the web expansion and contraction portion G2 of the back side sheet member 2B, and the extension portion expansion and contraction portion G3 are also the same (see FIGS. 4 and 5).

As shown in Fig. 4 and Fig. 5, the absorbent main body side fixing portion 28 is located on the inner side in the lateral direction (Y direction) of the diaper from the position of the outer side in the lateral direction (Y direction) of the diaper from the side edge 3c of the absorbent body 3. (central side) is formed, but it can also be replaced Further, it is formed so as to extend over the inside and outside of the side edge 3c of the absorbent body 3, or to be formed outside the side edge 3c of the absorbent body 3 in the lateral direction (Y direction) of the diaper.

The extension length L5 of the front side extension portion 21a (the length in the longitudinal direction of the diaper, see FIG. 3) is preferably 5% or more, and more preferably 5% or more of the length La (see FIG. 3) in the same direction of the front side sheet member 2A. 20% or more, further preferably 60% or less, further preferably 40% or less, specifically, preferably 5% or more and 60% or less, particularly preferably 20% or more and 40% or less, and the back side extension portion 21b The extension length L6 (the length of the diaper longitudinal direction, see FIG. 3) is preferably the length Lb of the back side sheet member 2B in the same direction (see FIG. 3), similarly to the extension length L5 of the front side extension portion 21a. 5% or more, more preferably 20% or more, further preferably 60% or less, further preferably 40% or less, specifically, preferably 5% or more and 60% or less, particularly preferably 20% or more and 40% %the following. Further, in the case of a diaper for a child, the extension lengths L5 and L6 of the abdominal side and the back side extension portions 21a and 21b are preferably 10 mm or more, more preferably 20 mm or more, and still more preferably 100. Mm or less is further preferably 70 mm or less, and specifically, preferably 10 mm or more and 100 mm or less, more preferably 20 mm or more and 70 mm or less. In the case of a diaper for adults, the respective extension lengths L5 and L6 of the front and back extension portions 21a and 21b are preferably 10 mm or more, more preferably 20 mm or more, and still more preferably 150 mm or less. Further, it is preferably 100 mm or less, and specifically, preferably 10 mm or more and 150 mm or less, more preferably 20 mm or more and 100 mm or less.

Further, from the viewpoint of visually judging the front and rear viewpoints and completely covering the protruding buttocks, it is preferable that the extension length L6 of the back side extension portion 21b It is the same as the extension length L5 of the abdominal extension portion 21a (L5=L6), or is equal to or greater than (L6>L5).

Further, by providing both the front side extension portion 21a and the back side extension portion 21b, the side seal portion 4 of the diaper 1 in the worn state can be formed substantially straight. Thereby, the appearance as the clothes at the time of wearing is excellent, and in particular, the ventral extension portion 21a is pulled rearward, so that offset printing due to excessive tightening due to shrinkage is less likely to occur.

The ratio (L5/L6) of the extension length L5 of the front side extension portion 21a to the extension length L6 of the back side extension portion 21b is preferably 1.0 or less, more preferably 0.2 or more and 0.8 or less, and is visually judged before and after. From the viewpoint, it is particularly preferably 0.4 or more and 0.6 or less. Further, from the viewpoint of reducing the number of components in manufacturing, etc., it is particularly preferable that L5 = L6. Further, by L5 = L6 and the contraction force of the front side extension portion 21a is larger than the contraction force of the back side extension portion 21b, the side seal portion 4 of the diaper 1 in the worn state can be further brought closer to a straight line. Thereby, the appearance as the clothes at the time of wearing is excellent, and in particular, the ventral extension portion 21a is pulled rearward, so that offset printing due to excessive tightening due to shrinkage is less likely to occur.

In the waist stretchable portion G1, the abdominal stretchable portion G2, and the extended portion stretchable portion G3 of each of the front side sheet member 2A and the back side sheet member 2B, the elastic member 24 is contracted, and the sheet between the adjacent longitudinal joint portions is formed. 22 and 23 are deformed in such a manner as to bulge outward, and pleats 29 formed by the sheet 22 or the sheet 23 are formed between the adjacent longitudinal joint portions, and a wrinkle 29 is formed between the two sheets 22 and 23. The hollow portion 30 surrounded by the pleats 29 (see Figs. 6(a) and 6(b)). The front side sheet member 2A and the back side sheet are formed by forming the wrinkles 29 and the hollow portion 30 In addition, the softness of the material member 2B is improved, and the touch of the skin is improved. In addition, air is easily circulated between the wrinkles 29 formed on the skin contact surface side, and the aggregation resistance is also excellent. In particular, when the inner layer sheet 23 is formed of a gas permeable sheet such as a nonwoven fabric or the like, moisture in the diaper 1 is more likely to escape to the outside.

Further, in the diaper 1 of the above-described embodiment, as shown in FIG. 3, the outer layer sheet 22 and the inner layer sheet 23 have the inner layer sheet 23 at the edge portion 2c constituting the peripheral edge end of the opening of the waist portion. The side-folded extended folded-back portions 22a and 23a extend the folded-back portions 22a and 23a in the side seal portion 4, and are joined to the unfolded portions of the outer layer sheet 22 and the inner layer sheet 23, and overlap the longitudinal direction of the absorbent body 3. The portion is joined to the surface of the side of the front sheet 31 of the absorbent body 3 by an adhesive.

The diaper 1 is in a contracted state, and the width Lf of the extending portion 21a of the front side sheet member 2A is formed to be narrower than the width Lb of the extending portion 21b of the back side sheet member 2B. Thus, by making the width Lf < width Lb, it is easy to distinguish the diaper 1 before and after wearing even before wearing. Here, the "state of contraction" refers to a state in which the elastic member 24 is contracted in a natural state, and is the same as the state before wearing the diaper. Further, the width Lf of the extending portion 21a of the front side sheet member 2A is a measured value of the portion of the extending portion 21a whose length in the lateral direction (Y direction) is the shortest, and is generally, as shown in Fig. 2, both sides of the extending portion 21a. The length between the lower end (the two corners of the lower crotch portion C side). Similarly, the width Lb of the extending portion 21b of the back side sheet member 2B is also a measured value of the portion where the length in the lateral direction (Y direction) of the extending portion 21b is the shortest. Generally, as shown in FIG. 2, it is the two of the extending portions 21b. The length between the lower end of the side edge (the two corners of the lower crotch portion C side). As far as the diaper 1 is easily recognized before wearing, in particular, In the case of a diaper for infants, the value (Lb-Lf) obtained by subtracting the width Lf from the width Lb is preferably more than 10 mm, and more preferably more than 20 mm. Further, specifically, in the case of a diaper for adults, the value (Lb - Lf) obtained by subtracting the width Lf from the width Lb is preferably more than 20 mm, and more preferably more than 30 mm.

Since the width Lf of the extending portion 21a of the front side sheet member 2A is narrower than the width Lb of the extending portion 21b of the back side sheet member 2B in the natural state of contraction, the lateral direction of the extending portion 21a of the front side sheet member 2A The contraction force (in the Y direction) is formed to be higher than the contraction force in the lateral direction (Y direction) of the extending portion 21b of the back side sheet member 2B. Further, in the diaper 1, the contraction force in the lateral direction (Y direction) per unit length of the extending portion 21a of the abdominal sheet member 2A is formed to be higher than the unit length of the extending portion 21b of the back side sheet member 2B. The contraction force in the transverse direction (Y direction).

Specifically, the contraction force in the lateral direction (Y direction) of the extending portion 21a of the front side sheet member 2A is preferably 12 cN or more, more preferably 17 cN or more, further preferably 40 cN or less, and further preferably It is 35 cN or less, and specifically, it is preferably 12 cN or more and 40 cN or less, and more preferably 17 cN or more and 35 cN or less. The contraction force in the lateral direction (Y direction) per unit length of the extending portion 21a of the front side sheet member 2A is preferably 4 cN/mm or more, more preferably 7 cN/mm or more, and further preferably 15 cN/ It is preferably 13 cN/mm or less, and more preferably 4 cN/mm or more and 15 cN/mm or less, and more preferably 7 cN/mm or more and 13 cN/mm or less.

Further, the contraction force in the lateral direction (Y direction) of the extending portion 21b of the back side sheet member 2B is preferably 10 cN or more, more preferably 15 cN or more, further preferably 35 cN or less, and further preferably 30. Specifically, cN or less is preferably 10 cN or more and 35 cN or less, and more preferably 15 cN or more and 30 cN or less. Back The contraction force in the lateral direction (Y direction) per unit length of the extending portion 21b of the side sheet member 2B is preferably 2 cN/mm or more, more preferably 3 cN/mm or more, and further preferably 12 cN/mm. Hereinafter, it is preferably 10 cN/mm or less, specifically, 2 cN/mm or more and 12 cN/mm or less, and more preferably 3 cN/mm or more and 10 cN/mm or less.

The above contraction force was measured by a Tensilon universal testing machine (RTC-1210A) manufactured by ORIENTEC Co., Ltd. The specific assay is as follows.

As shown in Fig. 3, in the diaper 1 in the stretched state, the length in the longitudinal direction (X direction) of the extending portion 21a extending further downward than the side seal portion 4 is measured. The length in the longitudinal direction (X direction) is the length of the side portion of the extending portion 21a in the longitudinal direction (X direction), that is, the portion of the extending portion 21a that is lower than the side sealing portion 4. More specifically, in the unfolded state, the lines (Z, Z) extending along the inner edges of the both side seal portions 4, 4 are led out to the extending portion 21a (see Fig. 3). Next, the extending portion 21a extending further downward than the side seal portion 4 is cut. The cut sample of the extending portion 21a is a portion including the absorbent body 3, that is, a portion of the absorbent body 33, a portion of the front sheet 31, a portion of the back sheet 32, and a side flange, in addition to the extending portion expansion portion G3. A composite of one part of 34. Then, with respect to the cut sample of the extending portion 21a, the length (maximum elongation length) between Z and Z in the state of being elongated to the maximum is obtained. Further, when the length of the state in which the elongation is maximized is calculated, when the elastic member 24 of the extending portion 21a is detached, a process such as a point seal or ultrasonic sealing is performed. Then, the cut sample of the extension portion 21a is placed in the Tensilon universal testing machine at a distance of 100 mm between the chucks (the length of the sample according to the natural state) Under the condition that the change is made, the left and right lines Z and Z which are taken out are fixed at the front end of the chuck head of the Tensilon universal testing machine (in other words, the above-mentioned chuck head clamps and fixes the extension portion 21a) The tensile load (cN) when the length is extended to the length of 80% of the maximum elongation length obtained before the elongation of 300 mm/min at a fixed speed of 300 mm/min. ) Set to contraction force. Further, the value obtained by dividing the tensile load (cN) by the length of the longitudinal direction (X direction) of the extending portion 21a measured in advance is defined as the contraction force per unit length. The extension portion 21b of the back side sheet member 2B is also measured in the same manner as the extension portion 21a of the front side sheet member 2A. The measurement system was carried out three times, and the average value was calculated, and the value of the contraction force of each of the extending portions 21a and 21b and the value of the contraction force per unit length were determined.

The reason for specifying the restoring force of the length corresponding to 71% of the maximum elongation length is that the length of the abdominal circumference of the child wearing the pants-type disposable diaper 1 of the present embodiment is 71 compared with the inner size of the diaper. %about. In addition, the length of the abdominal circumference referred to here is an average value of the abdominal circumference measured by the standing posture and the sitting posture in consideration of the change in the circumference of the abdominal circumference when the posture of the child changes.

In order to form the contraction force in the lateral direction (Y direction) of the extending portion 21a of the front side sheet member 2A to be higher than the lateral direction (Y direction) of the extending portion 21b of the back side sheet member 2B, it is preferable to satisfy At least one of I. to IV. Further, the number of the elastic members 24C of the elastic member 24C and the back side extension portion 21b of the front side extension portion 21a is preferably four or more, particularly preferably five or more, and more preferably 10 or less. It is 7 or less, and specifically, it is preferably 4 or more and 10 or less, and particularly preferably 5 or more and 7 or less.

I. The elastic member 24C regarding the front side extension portion 21a is disposed at an elongation higher than that of the elastic member 24F of the back side extension portion 21b. Specifically, the difference between the elongation of the elastic member 24C of the front side extension portion 21a and the elongation of the elastic member 24F of the back side extension portion 21b is preferably 25% or more and 80% or less with respect to the elongation of the elastic member 24F. More preferably, it is 40% or more and 60% or less.

The elongation of the elastic member disposed in each of the stretchable portions can be measured by the following method.

<Method for measuring elongation>

(1) For the diaper 1 in the unstretched state, a mark having a length of 20 mm is attached to each of the stretchable portions along the width direction.

(2) The sheet member and the elastic member are gripped at both end portions of the mark, and each of the stretchable portions is extended in the width direction until the wrinkles in the sheet members of the respective stretchable portions disappear (the stretched state).

(3) The length of the mark after the elongation (the distance between the both ends) Lp is measured.

(4) Let (Lp/20) × 100 (%) be the elongation of the elastic member disposed in each of the expansion and contraction portions.

(5) In the case of the diaper 1 which is not stretched, it is not possible to note the length of the 20 mm as long as the respective stretchable portions are along the width direction, and the marks are measured as much as possible at intervals.

II. Regarding the elastic member 24C of the front side extension portion 21a, an elastic member having a thicker elastic member 24F than the back side extension portion 21b is disposed. Specifically, the size of the single yarn of the elastic member 24C of the front side extension portion 21a is preferably 235 dtex or more, more preferably 310 dtex or more, further preferably 940 dtex or less, and further preferably 780 dtex or less. Specifically, it is preferably 235 dtex or more 940 Below dtex, it is more preferably 310 dtex or more and 780 dtex or less. The size of the single yarn of the elastic member 24F of the back side extension portion 21b is preferably 150 dtex or more, more preferably 280 dtex or more, further preferably 780 dtex or less, more preferably 720 dtex or less, specifically, It is preferably 150 dtex or more and 780 dtex or less, and more preferably 280 dtex or more and 720 dtex or less. It is preferable to arrange such linear elastic members 24C and 24F so as to have an elongation of 150% or more.

III. The elastic member 24C of the front side extension portion 21a is disposed in a shorter longitudinal direction (X direction) than the elastic member 24F of the back side extension portion 21b. In particular, the longitudinal direction (X direction) of the plurality of elastic members 24F of the back side extending portion 21b is substantially equally spaced, so that the longitudinal direction (X direction) of the plurality of elastic members 24C of the front side extending portion 21a is The arrangement in which the end portion on the side of the front side main body portion 20a in the longitudinal direction (X direction) of the front side extension portion 21a is gradually shortened toward the end portion on the side of the lower crotch portion C causes the contraction of the crotch portion C side to become large. Therefore, it is preferable from the viewpoint of the appearance at the time of wearing. Specifically, the distance between the elastic members 24F of the back side extending portions 21b adjacent in the longitudinal direction (X direction) is preferably 4 mm or more, more preferably 5 mm or more, and further preferably 12 mm or less. Further, it is preferably 10 mm or less, and specifically, preferably 4 mm or more and 12 mm or less, and more preferably 5 mm or more and 10 mm or less. On the other hand, the distance between the elastic members 24C of the abdominal extending portions 21a adjacent in the longitudinal direction (X direction) is preferably 3 mm or more, more preferably 4 mm or more, and further preferably 10 mm or less. Further, it is preferably 8 mm or less, and specifically, preferably 3 mm or more and 10 mm or less, and more preferably 4 mm or more and 8 mm or less.

In particular, when the elastic member 24C of the front side extension portion 21a is disposed with the arrangement interval as described above, the difference between the arrangement interval between the side of the front side main body portion 20a and the arrangement interval of the crotch portion C side is preferably 1 mm. The above is more preferably 5 mm or more, further preferably 15 mm or less, further preferably 10 mm or less, and specifically preferably 1 mm or more and 15 mm or less, particularly preferably 5 mm or more and 10 mm or less. .

Further, the arrangement interval on the side of the front body portion 20a is preferably 5 mm or more, more preferably 10 mm or more, further preferably 20 mm or less, further preferably 15 mm or less, and specifically, preferably 5 mm or more and 20 mm or less, particularly preferably 10 mm or more and 15 mm or less, and the arrangement interval of the crotch portion C side is preferably 2 mm or more, further preferably 3 mm or more, and more preferably 10 mm or less. It is preferably 8 mm or less, and specifically, preferably 2 mm or more and 10 mm or less, and particularly preferably 3 mm or more and 8 mm or less.

IV. The length of the elastic member 24C that divides the finely divided in the weakly functionalized region of the ventral extension 21a is longer than the length of the thinner divided elastic member 24F in the weakly functionalized region of the back extension 21b . In the weakly functionalized region, the plurality of linear elastic members 24C and 24F are each divided into a plurality of pieces, and the elastic members 24C and 24F which are relatively finely divided have a state in which there is almost no contraction force as described above. However, although it is a finely divided elastic member 24C, 24F, it still has a certain contraction force. Specifically, the length of the elastic member 24F that is divided in the weakly functionalized region of the back side extension portion 21b is preferably 1 mm or more, more preferably 3 mm or less, and still more preferably 2 mm or less. It is preferably 1 mm or more and 3 mm or less, and more preferably 1 mm or more and 2 mm or less. On the other hand, the weak function of the ventral extension 21a The length of the divided elastic member 24C in the region is preferably 2 mm or more, more preferably 5 mm or less, further preferably 3 mm or less, and specifically, preferably 2 mm or more and 5 mm or less. Further, it is preferably 2 mm or more and 3 mm or less.

Further, from the viewpoints of simplification of the manufacturing steps and the use of a small number of members, it is preferable that the front side extension portion 21a of the front side sheet member 2A and the back side extension portion 21b of the back side sheet member 2B are The elastic members 24C and 24F having the same thickness are disposed at the same elongation. Even if the thickness and elongation of the elastic members 24C and 24F are the same, it is easy to distinguish the diaper before and after the diaper due to the difference in the contraction state of the extending portions 21a and 21b.

The effect of the use of the diaper 1 of the embodiment of the present invention described above will be described.

As shown in Fig. 2, in the state in which the diaper 1 is contracted, the width Lf of the extending portion 21a of the front side sheet member 2A is formed to be narrower than the width Lb of the extending portion 21b of the back side sheet member 2B. Thus, by making the width Lf < width Lb, it is easy to distinguish the diaper 1 before and after wearing.

Moreover, as shown in FIG. 3, the front side sheet member 2A and the back side sheet member 2B of the diaper 1 are rectangular shape in an extended state. Therefore, it is not necessary to remove an unnecessary portion as a scrap, the processing apparatus can be simplified, and high-speed production can be realized.

Further, the diaper 1 is provided with the elastic member 24C in the front side extension portion 21a as shown in Fig. 4, and as shown in Fig. 7(a), the weight of the diaper 1 is increased even if the urination of the wearer is absorbed during use. In the case of the case, it is also possible to suppress the deviation of the diaper 1 in the worn state. Further, as shown in Fig. 7(a), the ventral extension Since 21a is entirely in contact with the groin portion on the front side of the wearer and is supported by the face, it is difficult to leave an impression on the skin of the groin of the wearer, and it is difficult to feel that the leg is difficult to move.

Further, the diaper 1 is provided with the back side extension portion 21b as shown in Fig. 5, and as shown in Fig. 7(c), it can cover the buttocks of the wearer in a worn state, and is similar to the appearance of the clothes, and if For children, parents can feel at ease. Moreover, since the elastic member 24F is provided in the back side extension part 21b as shown in FIG. 5, as shown in FIG. 7 (c), adhesiveness improves.

Further, since the diaper 1 includes the abdominal extension portion 21a having the elastic member 24C and the back extension portion 21b having the elastic member 24F as shown in Figs. 4 and 5, the urine is worn as shown in Fig. 7(b). In the case of the sheet 1, the side seal portion 4 extends straight in the longitudinal direction (X direction) substantially on the front side of the wearer's body, so that both the appearance and the processing are preferable. Further, as shown in Fig. 7(b), when the side seal portion 4 is formed to extend straight in the longitudinal direction (X direction) substantially on the front side of the wearer's body, it is near the lower end of the side seal portion 4, particularly The lower end of the ventral extension portion 21a is less likely to be tightened, and it is difficult to leave an impression on the skin of the groin of the wearer, and it is difficult to feel that the leg is difficult to move.

Further, as shown in Fig. 3, the width (L8a) of the front side fixing portion 8A of the diaper 1 is the same as the width (L8b) of the back side fixing portion 8B, but the width (L81a) of the front side extending fixing portion 81a is formed to be larger. The width (L81b) of the back side extension fixing portion 81b is narrow. Further, when the contraction force in the lateral direction (Y direction) of the extending portion 21a of the front side sheet member 2A is formed to be higher than the lateral direction (Y direction) of the extending portion 21b of the back side sheet member 2B, accordingly, Before the wearing, the contraction of the extension portion 21a of the abdominal sheet member 2A with respect to the contraction of the extension portion 21b of the back side sheet member 2B It becomes bigger and easier to distinguish before and after.

Hereinabove, the present invention has been described based on preferred embodiments thereof, but the present invention is not limited to the above embodiments, and can be appropriately modified.

For example, in the diaper 1 of the above-described embodiment, the absorbent main body 3 is fixed to the central portion of the lateral body portion 20a and the extending portion 21a in the lateral direction (Y direction) of the abdominal sheet member 2A via an adhesive, and The central portion of the back side body portion 20b and the extending portion 21b in the lateral direction (Y direction) of the back side sheet member 2B is fixed via an adhesive, but may be fixed only to the front side sheet member 2A via an adhesive. The central portion of the front side main body portion 20a in the lateral direction (Y direction) is fixed only to the central portion in the lateral direction (Y direction) of the back side main body portion 20b of the back side sheet member 2B via the adhesive. At this time, the elastic member 24C may not be finely divided in the extension portion 21a of the unfixed abdominal sheet member 2A, and the weakly functionalized region may not be formed. Similarly, a weakly functionalized region may not be formed in the extended portion 21b of the unfixed back side sheet member 2B.

Further, in the diaper 1 of the above-described embodiment, the elastic member 24A, the elastic member 24B, the elastic member 24D, and the elastic member 24E are all disposed at an elongation equal to that of the elastic member 24F, but they may not be equal.

Further, the front side sheet member 2A and the back side sheet member 2B may each have a structure in which the outer sheet member 22 constituting the outer surface of the diaper and the inner layer sheet 23 disposed on the inner side thereof are disposed in the entire region. Instead of having a dot-like joint portion 26 formed so as not to overlap with the elastic member 24. Further, the waist elasticized portion G1, the abdominal stretchable portion G2, and the extended portion expanded and contracted portion G3 may have the outer sheet 21 and the outer layer constituting the outer surface of the diaper as a whole or a part thereof. The inner layer sheet 23 on the inner side thereof is adjacent to the entire structure. However, as described above, the front and rear extension portions 21a and 21b are important portions for supporting the weight of the diaper when the urination of the wearer is absorbed during use, and the weight of the diaper 1 is increased, so that the influence on the skin is large. Therefore, it is preferable to have a dot-like joint portion 26 formed so as not to overlap with the elastic member 24.

Further, the side seal portion 4 is formed by joining the side edge portions 2a and 2b of the front side and the back side sheet member, but may have the front side sheet member 2A and the back side sheet member 2B on the outer side of the side seal portion 4. Non-joined portions of unbonded narrow webs (eg, over 0 mm and below 20 mm).

Further, the pants-type absorbent article may be a pants-type menstrual napkin or the like in addition to the pants-type disposable diaper for children or adults.

The description of the above-described embodiments and the requirements of only one embodiment can be appropriately applied to other embodiments, and the requirements of the respective embodiments can be replaced with each other as appropriate.

In the above embodiment, the following pants-type absorbent article is further disclosed.

<1>

A pants-type absorbent article comprising a belly sheet member disposed on a ventral side of a wearer, a back side sheet member disposed on a back side of the wearer, and a erect and fixed to the ventral sheet member and a longitudinally long absorbent body on the back side sheet member, wherein both side edges of the front side sheet member are joined to both side edges of the back side sheet member to form a pair of side seal portions and a waist opening portion And a pair of leg opening portions; the front side sheet member and the back side sheet member respectively include an extending portion extending downward from the side sealing portion, and the plurality of elastic members are laterally An extended state is disposed in each of the extending portions, so that each of the extending portions has a stretchability in a lateral direction; and in a contracted state, a width of the extending portion of the front side sheet member is longer than the extending of the back side sheet member The width of the department is narrow.

<2>

The pants-type absorbent article according to the above <1>, wherein the absorbent body comprises a liquid-permeable front sheet, a liquid-impermeable or water-repellent back sheet, and a liquid retaining property interposed between the sheets. The absorber.

<3>

The pants-type absorbent article according to the above <1>, wherein the absorbent body has a rectangular shape that is long in the longitudinal direction of the pants-type absorbent article.

<4>

The pants-type absorbent article according to the above aspect, wherein the absorbent body comprises an absorbent core containing an aggregate of fibers such as pulp fibers or an absorbent core in which particles of the water-absorbent polymer are held, And a core wrapping sheet covering the absorbent core.

<5>

The pants-type absorbent article according to the above <2>, wherein the absorbent body has a rectangular shape which is long in the longitudinal direction of the pants-type absorbent article.

<6>

The pants-type absorbent article according to the above <4>, wherein the absorbent body includes a material for forming the absorbent core or a base of the forming material on both sides along the longitudinal direction of the pants-type absorbent article. It is less heavy than the other parts of the low rigidity.

<7>

The pants-type absorbent article according to the above <6>, wherein the low rigidity portion is formed long in the longitudinal direction of the pants-type absorbent article.

<8>

The pants-type absorbent article according to any one of the above aspects, wherein the absorbent body has a liquid-resistance or water repellency and gas permeable material on both sides in the longitudinal direction of the absorbent body. The side is turned over.

<9>

The pants-type absorbent article according to the above <8>, wherein a side flange elastic member is disposed in an extended state in the vicinity of the free end of the side flange.

<10>

The pants-type absorbent article according to any one of the above aspects, wherein the ventilated sheet member has a horizontally long rectangular shape in a state in which the pants-type absorbent article is unfolded and stretched.

<11>

The pants-type absorbent article according to any one of the above aspects, wherein the back side sheet member has a horizontally long rectangular shape in a state in which the pants-type absorbent article is unfolded and stretched.

<12>

The pants-type absorbent article according to the above <11>, wherein the front side sheet member and the back side sheet member have the same shape.

<13>

The pants-type absorbent article according to any one of the above aspects, wherein the ventral sheet member comprises, on the both side edges of the ventral sheet, respectively: Forming a joint portion of the side seal portion between the front side sheet member and the back side sheet member; and extending the lower side of the joint portion to the back side sheet member and the back side sheet a non-joining portion that is not joined between the material members; the back side sheet member at the two side edges of the back side sheet member respectively including: between the back side sheet member and the front side sheet member a joint portion formed with the side seal portion; and a non-joining portion extending below the joint portion and not joined between the back side sheet member and the front side sheet member; and The joint portion of one of the side edge portions of the side sheet member is joined to the joint portion as a part of the side edge portion of the back side sheet member, and a pair of the side seal portions are formed.

<14>

The pants-type absorbent article according to the above <13>, wherein the front side sheet member includes a front side body portion between the joint portions of the front side sheet member and a lower side of the front side body portion The above extension of the extended rectangle.

<15>

The pants-type absorbent article according to the above <13>, wherein the back side sheet member includes a back side body portion between the joint portions of the back side sheet member, and a back side body portion The above-mentioned extension of the rectangle extending on the side of the lower jaw.

<16>

The pants-type absorbent article according to any one of the aspects of the present invention, wherein the ventral sheet member and the back sheet member comprise The outer layer sheet other than the outer surface of the article, the inner layer sheet disposed on the inner surface side of the outer layer sheet, and the plurality of linear members disposed in an extended state between the two sheets.

<17>

The pants-type absorbent article according to any one of the above aspects, wherein the front side body portion as the body portion of the front side sheet member and the back portion of the body portion of the back side sheet member are Each of the side body portion, the extension portion of the front side sheet member, and the extension portion of the back side sheet member, the plurality of the elastic members respectively extending in a lateral direction of the pants-type absorbent article The pants-type absorbent article is disposed in an elongated state at intervals in the longitudinal direction.

<18>

The pants-type absorbent article according to any one of the above aspects, wherein the waist stretchable portion is formed in the pants type absorbent in each of the front side sheet member and the back side sheet member. The longitudinal direction (X direction) of the article is closer to the longitudinal direction (X direction) of the pants-type absorbent article than the end portion of the absorbent body in the longitudinal direction.

<19>

The pants-type absorbent article according to the above <18>, wherein the abdominal stretchable portion is formed in the longitudinal direction (X direction) of the pants-type absorbent article in each of the front sheet member and the back sheet member. The upper waist stretchable portion is between the extension portion of the front side sheet member or the extension portion of the back side sheet member.

<20>

The pants-type absorbent article according to the above <19>, wherein the extension portion is formed An extension of the front side sheet member or an extension of the back side sheet member.

<21>

The pants-type absorbent article according to the above aspect, wherein the plurality of elastic members are disposed in the waist stretchable portion, the plurality of elastic members are disposed on the web expansion and contraction portion, and the plurality of elastic members are disposed in the extension portion expansion and contraction portion. The above elastic member.

<22>

The pants-type absorbent article according to any one of the above aspects, wherein the extending portion of the front side sheet member and the extending portion of the back side sheet member are respectively overlapped with the absorbent body The region has a weakly functionalized region in which the elastic member has a reduced expansion and contraction function.

<23>

The pants-type absorbent article according to the above <22>, wherein the extending portion of the front side sheet member and the extending portion of the back side sheet member respectively overlap a portion overlapping the absorbent body The members are each divided into a plurality of pieces to form the above-mentioned weakly functionalized area.

<24>

The pants-type absorbent article according to the above <23>, wherein the plurality of the elastic members are disposed in an elongated state in the lateral direction in the front side main body portion of the front side sheet member, and the abdominal stretchable portion is formed; The material member is fixed to the center portion of the pants-type absorbent article in the lateral direction of the pants-shaped absorbent article, and the absorbent body is fixed via an adhesive; and the abdominal stretchable portion overlapping the absorbent body has almost no There is a state of contraction and a weakly functionalized region is formed.

<25>

The pants-type absorbent article according to the above <23> or <24>, wherein the plurality of elastic members are disposed in an extended state in the lateral direction in the back side main body portion of the back side sheet member to form a web expansion and contraction portion; The back side sheet member is fixed to the center portion of the pants-type absorbent article in a state where the back sheet member is stretched and stretched, and the absorbent body is fixed via an adhesive; and the abdominal stretchable portion overlapping the absorbent body A weakly functionalized region is formed in a state in which there is almost no contraction force.

<26>

The pants-type absorbent article according to the above <24>, wherein the plurality of the elastic members of the abdominal stretchable portion overlapping the absorbent body are each divided into a plurality of pieces to form a weakly functionalized region. .

<27>

The pants-type absorbent article according to any one of the above aspects, wherein the extension length of the extension portion of the ventral sheet member (the length of the longitudinal direction of the pants-type absorbent article) is the ventral sheet 5 to 60% or 20 to 40% of the length of the material member in the same direction, and the extension length of the extension portion of the back side sheet member (the longitudinal length of the pants-type absorbent article) is the back side sheet member The length of the same direction is 5 to 60%, or 20 to 40%.

<28>

The pants-type absorbent article according to any one of the above-mentioned items, wherein the extension of the extension of the back side sheet member and the ventral sheet member The extensions have the same extension length.

<29>

The pants-type absorbent article according to any one of the above aspects, wherein the extending portion of the back side sheet member has an extended length which is longer than an extension of the extending portion of the front side sheet member.

<30>

The pants-type absorbent article according to the above <29>, wherein a ratio (L5/L6) of the extending length L5 of the extending portion of the front side sheet member to the extending length L6 of the extending portion of the back side sheet member is 1.0. The following, or 0.2 to 0.8, or 0.4 to 0.6.

<31>

The pants-type absorbent article of any one of the above-mentioned <1> to <30> wherein the lateral contraction force of the extending portion of the front side sheet member is higher than the transverse direction of the extending portion of the back side sheet member The contraction force.

<32>

The pants-type absorbent article according to the above <31>, wherein a contraction force in a lateral direction (Y direction) of the extending portion of the front side sheet member is 12 to 40 cN or 17 to 35 cN.

<33>

The pants-type absorbent article according to the above <31> or <32>, wherein the lateral (Y-direction) contraction force of the extending portion of the back side sheet member is 10 to 35 cN or 15 to 30 cN.

<34>

A pants-type absorbent article according to any one of the above <31> to <33>, wherein The transverse contraction force per unit length of the above-mentioned extension portion of the front side sheet member is higher than the transverse contraction force per unit length of the above-mentioned extension portion of the back side sheet member.

<35>

The pants-type absorbent article according to the above <34>, wherein the transverse (Y-direction) contraction force per unit length of the extending portion of the front side sheet member is 4 to 15 cN/mm, or 7 to 13 cN/mm. .

<36>

The pants-type absorbent article according to the above <34> or <35>, wherein the lateral (Y-direction) contraction force per unit length of the extending portion of the back side sheet member is 2 to 12 cN/mm, or 3~ 10 cN/mm.

<37>

The pants-type absorbent article according to any one of the above aspects, wherein the extending portion of the front side sheet member and the extending portion of the back side sheet member are disposed at the same elongation An elastic member having the same thickness.

<38>

The pants-type absorbent article according to any one of the above aspects, wherein the absorbent body and the front side fixing portion of the front side sheet member have a width larger than the absorbent body and the back side sheet. The width of the back side fixing portion of the member is narrow.

<39>

The pants-type absorbent article according to any one of the above-mentioned <1> to <38> wherein the above-mentioned absorbent body of the ventral fixing portion and the ventral sheet member are The width of the front side extension fixing portion of the extension portion is narrower than the width of the back side extension fixing portion of the extending portion of the back side fixing portion and the extending portion of the back side sheet member.

<40>

The pants-type absorbent article according to any one of the above aspects, wherein the pants-type absorbent article is a pants-type disposable diaper for infants or adults, or a pants-type menstrual sanitary napkin.

<41>

The pants-type absorbent article according to the above <40>, wherein, in the case where the pants-type absorbent article is a diaper for infants, the width Lb of the extending portion of the back-side sheet member is subtracted in a state of being contracted The value (Lb - Lf) obtained by the width Lf of the extending portion of the above-mentioned ventral sheet member is larger than 10 mm or larger than 20 mm.

<42>

The pants-type absorbent article according to the above <40>, wherein, in the case where the pants-type absorbent article is a diaper for adults, the width Lb of the extending portion of the back-side sheet member is subtracted in a state of being contracted. The value (Lb - Lf) obtained by the width Lf of the extending portion of the above-mentioned ventral sheet member is larger than 20 mm or larger than 30 mm.

<43>

The pants-type absorbent article according to any one of the above aspects, wherein the outer side of the side seal portion includes a narrow width which is not joined to the back side sheet member and the back side sheet member. Joint part.

[Industrial availability]

According to the present invention, it is possible to provide a pants-type absorbent article which is easy to distinguish before and after wearing, and which is difficult to leave an impression on the groin portion of the wearer when worn.

1‧‧‧diapers

2A‧‧‧ Ventral sheet member

2a‧‧‧lateral edge

2a'‧‧‧ joints

2a"‧‧‧ Non-joining

2B‧‧‧ Back side sheet member

2b‧‧‧lateral edge

2b'‧‧‧ joint

2b"‧‧‧ Non-joining

2c‧‧‧Upper edge

2d‧‧‧lower edge

3‧‧‧Absorbable ontology

3a‧‧‧End

3b‧‧‧End

3c‧‧‧lateral edge

4‧‧‧Side seals

5‧‧‧Low opening

6‧‧‧ leg opening

7a‧‧‧Abdomen

7b‧‧‧ legs

8A‧‧‧ Ventral fixation

8B‧‧‧Back side fixation

20a‧‧‧ Ventral body

20b‧‧‧Back side body

21a‧‧‧Extension

21b‧‧‧Extension

22‧‧‧ outer sheet

22a‧‧‧Extended extension

23‧‧‧ Inner sheet

23a‧‧‧Extended extensions

24‧‧‧Flexible components

24A‧‧‧Flexible components

24B‧‧‧Flexible components

24C‧‧‧Flexible components

24D‧‧‧Flexible components

24E‧‧‧Flexible components

24F‧‧‧elastic components

26‧‧‧ joints

27‧‧‧End fixed part

28‧‧‧Absorbable body side fixing

29‧‧‧ pleats

30‧‧‧ Hollow

31‧‧‧Front sheet

32‧‧‧Back sheet

33‧‧‧Absorbers

33d‧‧‧Low rigidity

34‧‧‧Flanking

35‧‧‧Front flanged elastic members

80a‧‧‧ Ventral body fixation

80b‧‧‧Back side body fixing

81a‧‧‧ Ventral extension

81b‧‧‧Back extension extension

A‧‧‧ ventral side

B‧‧‧Back side

C‧‧‧Lower Department

G1‧‧‧Flexing Department

G2‧‧‧Flexing Department

G3‧‧‧Flexing Department

La‧‧‧ Length

Lb‧‧‧Width

Lf‧‧‧Width

L4‧‧‧ length

L5‧‧‧ extended length

L6‧‧‧Extended length

L81a‧‧‧Width

L81b‧‧‧Width

X‧‧‧ direction

Y‧‧‧ direction

Z‧‧‧ line

Fig. 1 is a plan view showing the wearing state of the pants-type disposable diaper according to the embodiment of the present invention.

Fig. 2 is a plan view showing the state (natural state) of the pants-type disposable diaper shown in Fig. 1 before wearing.

Fig. 3 is a partially cutaway plan view showing the unfolded and stretched state of the pant type disposable diaper shown in Fig. 1. The unfolded and stretched state refers to tearing the side seal portion to make the pants-type absorbent article into an unfolded state, and expanding the unfolded absorbent article to extend the elastic members of the respective portions to a design size (and completely exclude elasticity) The state up to the same size when the member is in the state of being affected by the influence of the member.

Fig. 4 is a partially cross-sectional enlarged view showing an extended state of the ventral side of the pant-type disposable diaper shown in Fig. 1 from the outer surface side of the diaper.

Fig. 5 is a partially cross-sectional enlarged view showing an extended state of the back side portion of the pant-type disposable diaper shown in Fig. 1 from the outer surface side of the diaper.

Fig. 6 is a view showing a cross section of each of the stretchable portions of the pant-type disposable diaper shown in Fig. 1 along the transverse direction of the diaper, and (a) is a view showing a state in which the elastic member is elongated to eliminate wrinkles, (b) A diagram showing a state in which the elastic member is contracted to form a wrinkle.

Fig. 7 is a view showing a state of use (wearing state) of the pants-type disposable diaper shown in Fig. 1, (a) is a view from the ventral side, and (b) is viewed from the side. (c) is a view seen from the side of the back side.

1‧‧‧diapers

2A‧‧‧ Ventral sheet member

2B‧‧‧ Back side sheet member

3‧‧‧Absorbable ontology

4‧‧‧Side seals

5‧‧‧Low opening

6‧‧‧ leg opening

A‧‧‧ ventral side

C‧‧‧Lower Department

Claims (15)

A pants-type absorbent article comprising a belly sheet member disposed on a ventral side of a wearer, a back side sheet member disposed on a back side of the wearer, and a erect and fixed to the ventral sheet member and a longitudinally long absorbent body on the back side sheet member, wherein both side edges of the front side sheet member are joined to both side edges of the back side sheet member to form a pair of side seal portions and a waist opening portion And a pair of leg opening portions; each of the front side sheet member and the back side sheet member includes an extending portion extending downward from the side sealing portion, and the plurality of elastic members are disposed in an extended state in each of the extending portions in the lateral direction And each of the extending portions has a stretchability in a lateral direction; and in a contracted state, a width of the extending portion of the front side sheet member is narrower than a width of the extending portion of the back side sheet member. The trouser-type absorbent article according to claim 1, wherein the ventral sheet member has a horizontally long rectangular shape in a state in which the trouser-type absorbent article is unfolded and stretched. The pants-type absorbent article according to claim 1 or 2, wherein the back side sheet member has a horizontally long rectangular shape in a state in which the pants-type absorbent article is unfolded and stretched. The trouser-type absorbent article according to claim 1 or 2, wherein the ventral sheet member is respectively included in the both side edges of the ventral sheet member: the ventral sheet member and the back sheet member a joint portion that forms the side seal portion and a non-joining portion that extends below the joint portion and that is not joined between the belly sheet member and the back sheet member; The back side sheet member includes, at the two side edge portions of the back side sheet member, a joint portion between the back side sheet member and the front side sheet member to form the side seal portion; And a non-joining portion extending below the joint portion and not joined between the back side sheet member and the front side sheet member; and the above-mentioned side edge portion of the front side sheet member The joint portion is joined to the joint portion as a part of the side edge portion of the back side sheet member to form a pair of the side seal portions. The pants-type absorbent article according to claim 4, wherein the front side sheet member comprises a front side body portion between the joint portions of the front side sheet member, and an underside of the lower side portion of the front side body portion The above extension of the rectangle. The pants-type absorbent article of claim 4, wherein the back side sheet member comprises a back side body portion between the joint portions of the back side sheet member, and extends to a lower crotch portion side of the back side body portion The above extension of the rectangle. The pants-type absorbent article according to claim 1 or 2, wherein the extending portion of the front side sheet member and the extending portion of the back side sheet member respectively have an elastic member in a region overlapping the absorbent body The weakly functionalized area where the telescopic function is reduced. The pants-type absorbent article according to claim 7, wherein the extending portion of the front side sheet member and the extending portion of the back side sheet member respectively overlap a portion overlapping the absorbent body, and the plurality of the elastic members are Each of the segments is divided into a plurality of pieces, and the above-mentioned weakly functionalized regions are formed. The pants-type absorbent article according to claim 8, wherein in the front body portion of the front side sheet member, the plurality of elastic members are disposed in an elongated state in a lateral direction to form an abdominal stretchable portion; the front side sheet member The absorbent body is fixed to the central portion of the pants-type absorbent article in the lateral direction via the adhesive in the state of being stretched and stretched; and the abdominal stretchable portion overlapping the absorbent body has almost no contraction force. A weakly functionalized area is formed in the state. The pants-type absorbent article according to claim 8 or 9, wherein in the back side body portion of the back side sheet member, the plurality of elastic members are disposed in an elongated state in a lateral direction to form a web-extending portion; the back side sheet The material member is fixed to the center portion of the pants-type absorbent article in the lateral direction of the pants-type absorbent article, and the absorbent body is fixed via an adhesive; and the abdominal stretchable portion overlapping the absorbent body has almost no shrinkage. The state of force forms a weakly functionalized area. The pants-type absorbent article according to claim 1 or 2, wherein the lateral contraction force of the extending portion of the front side sheet member is higher than the transverse contraction force of the extending portion of the back side sheet member. A pants-type absorbent article according to claim 11, wherein a transverse contraction force per unit length of said extension portion of said front side sheet member is higher than a lateral direction per unit length of said extension portion of said back side sheet member Contraction force. The trouser type absorbent article of claim 1 or 2, wherein the ventral sheet is The extending portion of the member and the extending portion of the back side sheet member are provided with the same thickness of the elastic member at the same elongation. The pants-type absorbent article according to claim 1 or 2, wherein a width of the front side fixing portion of the absorbent body and the front side sheet member is larger than a width of the back side fixing portion of the absorbent body and the back side sheet member The width is narrow. The pants-type absorbent article according to claim 1 or 2, wherein a width of said absorbent body of said front side fixing portion and said abdominal extending portion of said extending portion of said front side sheet member is larger than said back side fixing portion The absorptive body is narrower than the width of the back extension extending portion of the extending portion of the back side sheet member.