JP6442331B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

Conventionally, a pants-type disposable diaper comprising an exterior body and an absorbent main body fixed to the exterior body, for the purpose of improving the fit of the diaper to the wearer, etc. 2. Description of the Related Art There are known gathers formed by arranging elastic members in the lateral direction of a diaper at a peripheral portion of a waist opening at a side or below the waist.
It has also been proposed to form such a flexible stretchable part by arranging such a gathering elastic member so as not to be fixed to any of the two sheets sandwiching the elastic member.

  For example, the applicant of the present invention first joins two sheets constituting the exterior body at joints formed in a dotted shape in the vertical and horizontal directions of the diaper, while the two sheets are between In addition, an absorbent article such as a disposable diaper in which an elastic member for gathering is arranged so as not to pass through the joint has been proposed (see Patent Document 1).

JP 2011-78477 A JP-A-3-251245

  By arranging the elastic member for forming the gathers so that the whole or a part thereof is not fixed to the two sheets sandwiching the elastic member, the flexibility and feel of the exterior body can be enhanced. Moreover, according to the technique of patent document 1, since the sheet | seat which pinches | interposes an elastic member by the shrinkage | contraction of an elastic member forms the wrinkle which is excellent in a softness | flexibility, the touch of an exterior body improves and the recessed part between ribs also has it. It functions as an air passage and has good air permeability. Patent Document 1 also describes that an opening is formed in the flange portion formed by contraction of the elastic member, which can further improve the air permeability and the anti-sagging property.

  However, in order to improve the smoothness when the surface is boiled by hand, if the arrangement pitch of the joints in the lateral direction of the article is narrowed to form a relatively fine wrinkle, even if the surface is smooth, the bonding It was found that the exterior body tends to be hard due to the presence of relatively dense parts. In addition, the performance required for commodities such as disposable diapers is increasing year by year, and it is desired to provide an absorbent article with further improved flexibility in addition to touch. In addition, although patent document 2 describes providing an opening in the waist opening part vicinity or side part of a pants-type diaper, in the relationship with the junction part and heel of an exterior body in which a hollow heel is formed It does not suggest where the opening should be formed.

  Therefore, the present invention relates to an absorbent article that is less stuffy and excellent in touch and flexibility.

  The present invention relates to an absorbent article having an abdominal side portion disposed on the abdomen side of the wearer, a back side portion disposed on the back side portion of the wearer, and a crotch portion positioned therebetween, At least one of the part and the back side part has an elastic part that expands and contracts in the lateral direction of the article, and the elastic part is worn more than the outer layer sheet arranged on the side far from the skin of the wearer An inner layer sheet disposed on the skin side of the person, and between the outer layer sheet and the inner layer sheet, a plurality of joint rows along the article longitudinal direction are formed in a scattered manner so as to form a plurality of rows in the article lateral direction. At least one of the outer layer sheet and the inner layer sheet that are joined at the arranged joint portions and adjacent to each other between the joint row is deformed so as to swell in the thickness direction of the stretchable portion, and a hollow space is formed between the two sheets. A portion is formed, and in the joint portion, And overall joint or part opening is formed so as to overlap, there is provided an absorbent article.

  The absorbent article of the present invention is less stuffy and excellent in touch and flexibility.

FIG. 1 is a perspective view showing a usage state (wearing state) of a pants-type disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed plan view of the diaper shown in FIG. 1 expanded and stretched from the skin contact surface side. FIG. 3 is an enlarged plan view showing, in an enlarged manner, a joint portion row of the diaper shown in FIG. 1 and joint portions constituting the joint portion row. FIG. 4 is an enlarged cross-sectional view showing a cross section of the waistline lower stretchable part in the diaper shown in FIG. 1 along the article lateral direction. FIG. 5 is an enlarged cross-sectional view showing a cross section along the article lateral direction of the waist stretchable part in the diaper shown in FIG. 1. FIG. 6A to FIG. 6H are partially enlarged plan views showing a joint portion and an opening formed in the joint portion in another embodiment of the present invention. FIG. 7 is a cross-sectional view showing a main part in still another embodiment of the present invention. FIG. 8A and FIG. 8B are partially enlarged plan views of the abdomen side or the dorsal side part showing the joint row and the formation mode of the joint in still another embodiment of the present invention.

Below, the absorptive article of the present invention is explained based on the desirable embodiment, referring to drawings.
The disposable diaper 1 which is one Embodiment of this invention is demonstrated referring FIGS. 1-3. As shown in FIG. 1, the disposable diaper 1 of the present embodiment is a pants-type disposable diaper, and includes an exterior body 2 and an absorbent main body 3 fixed to the exterior body 2. Moreover, the diaper 1 has the abdominal side part A distribute | arranged to a wearer's belly side at the time of wear, and the back side part B distribute | arranged to a wearer's back | dorsal side, The article in the abdominal side part A A pair of side seal parts 4 and 4 are formed by joining both ends in the lateral direction Y and both ends in the article lateral direction Y in the back side B. Moreover, the waist opening part 5 and a pair of leg opening part 6 are formed by this joining. The diaper 1 has a crotch part C disposed between the stomach side A and the back side part B between the wearer's crotch.

The exterior body 2 in the diaper 1 of the present embodiment includes a ventral sheet member 2A that forms the ventral part A and a back sheet member 2B that forms the dorsal part B, and a pair of side seal parts. In 4 and 4, the ventral sheet member 2A and the dorsal sheet member 2B are joined. As shown in FIG. 2, the absorbent main body 3 is bridged and fixed between a central portion in the article lateral direction Y of the abdominal sheet member 2 </ b> A and a central portion in the article lateral direction Y of the back side sheet member 2 </ b> B. . In the absorbent main body 3, the overlapping portions of the abdominal sheet member 2 </ b> A and the back sheet member 2 </ b> B are joined to both the sheet members 2 </ b> A and 2 </ b> B entirely or partially by a known joining means such as an adhesive. ing.
The exterior body 2 is a narrow area in which the space between the abdominal sheet member 2A and the back sheet member 2B is not bonded to both ends of the article lateral direction Y in the abdominal or back sheet member, for example, an area of 10 mm or less. This case is also included in the case where the abdominal part A and the back part B are joined at both ends in the article lateral direction Y.

As shown in FIG. 2, the diaper 1 of the present embodiment is formed symmetrically with respect to the article longitudinal center line CL extending in the article longitudinal direction X. Therefore, in the following description, the right and left symmetrical portions are mainly described on the right side in FIG. 2, but the left side also has the same configuration except that it is bilaterally symmetrical with the right side.
In addition, the article longitudinal direction X is a direction from a portion disposed on the wearer's stomach side to a portion disposed on the back side through a portion disposed between the crotch, and is generally a longitudinal direction of the absorbent main body 3. Match. On the other hand, the article lateral direction Y is a direction orthogonal to the article longitudinal direction X in a state where the absorbent article such as a diaper is expanded and stretched as shown in FIG. 2, and as shown in FIG. The cylindrical waistline portion D formed by connecting the ventral portion A and the back portion B coincides with the circumferential direction. In addition, since the article longitudinal direction X is the vertical direction when worn on the abdominal side A and the back side B, the waist opening 5 side is on the upper side or the upper side on the abdomen side A and the back side B. The part C side is also referred to as a lower side or a lower side.

  In the diaper 1 of the present embodiment, the abdominal sheet member 2A and the back sheet member 2B constituting the exterior body 2 are respectively an outer layer sheet 22 that forms the outer surface of the diaper and an outer layer sheet 22 as shown in FIG. An inner layer sheet 23 disposed on the inner surface side and a plurality of thread-like elastic members 24 disposed in an extended state between the two sheets 22, 23 are provided, respectively, a waist stretchable part G1 and a waistline lower stretchable part G2. have. In the diaper 1 of the present embodiment, the outer layer sheet 22 that forms the outer surface of the diaper is an outer layer sheet disposed on the side far from the skin of the wearer, and the inner layer sheet 23 is worn in the exterior body 2 more than the outer layer sheet. It is an inner layer sheet arranged on the side close to the person's skin. This inner layer sheet 23 is the “inner layer sheet disposed on the skin side of the wearer than the outer sheet” in the present invention.

The waist stretchable part G <b> 1 is formed on the outer side of both ends 3 a and 3 b in the longitudinal direction of the absorbent main body 3 in the longitudinal direction X of the diaper 1. The waist elastic part G1 is formed in the peripheral part of the waist opening part 5, and is distribute | arranged to a wearer's waist part at the time of wear. The lower waist extension part G2 is formed below the waist extension part G1 and above the lower end of the side seal part 4 in each of the abdominal sheet member 2A and the back sheet member 2B.
In the waist stretchable part G1 and the waistline lower stretchable part G2, the outer layer sheet 22 and the inner layer sheet 23 are joined at a large number of joints 26 formed in a dotted pattern.

More specifically, as shown in FIG. 2, a joint portion 26 in which the outer layer sheet 22 and the inner layer sheet 23 are fused to the waist stretchable part G1 of each of the abdominal sheet member 2A and the back sheet member 2B, It is formed intermittently so as to form a line along the article longitudinal direction X, and a plurality of joined part rows 26S composed of the joined parts 26 are formed at intervals in the article lateral direction Y.
Also, the joint portions 26 where the outer layer sheet 22 and the inner layer sheet 23 are fused are arranged in a line along the article longitudinal direction X in the waistline lower stretchable part G2 in each of the abdominal sheet member 2A and the back sheet member 2B. As formed, a plurality of rows of joint portions 26 </ b> P including a plurality of joint portions 26 are formed at intervals in the article lateral direction Y.
In the article side areas S and S in the abdominal sheet member 2A and the back sheet member 2B, the joint part row 26S of the waist stretchable part G1 and the joint part row 26P of the waistline lower stretchable part G2 are provided in the longitudinal direction of the article. A continuous row in the direction X is formed. The article side areas S and S are areas located outside the article lateral direction Y from the positions of the side edges 3c and 3c of the absorbent main body 3.

In the waist stretchable part G1 of the diaper 1 of the present embodiment, the positions of the joints 26 in the article longitudinal direction X are substantially the same for all joint rows 26S. The plurality of elastic members 24 are arranged so as to extend in the article lateral direction Y through the gaps between the joint portions of the joint row 26S. The plurality of elastic members 24 are all disposed between the outer layer sheet 22 and the inner layer sheet 23.
Similarly, in the waistline lower stretchable parts G2 and G2, the positions of the joints 26 in the article longitudinal direction X are substantially the same for all the joint rows 26P. The plurality of elastic members 24 extend in the article lateral direction Y through the gaps between the joint portions of the plurality of joint portion rows 26P. The plurality of elastic members 24 are all arranged between the outer layer sheet 22 and the inner layer sheet 23.

  In the diaper 1 of the present embodiment, as shown in FIG. 2, the abdominal sheet member 2A and the back sheet member 2B are both outer layer sheets 22 and inner layer sheets 23 on both sides of the article longitudinal center line CL. Between the outer layer sheet 22 and the inner layer sheet 23, in the vicinity of the position of the side edge 3 c of the absorbent main body 3. Has a main-body-side fixing region 28 bonded through an adhesive. The pair of outer fixing regions 27 are arranged on the outer side (sides) from the main body fixing region 28 in the article lateral direction Y of each of the abdominal sheet member 2A (abdominal side portion A) and the back side sheet member 2B (back side portion B). More specifically, it is formed at a part spaced apart (on the seal part side), more specifically, at the end in the article lateral direction Y or in the vicinity thereof. The outer fixing region 27 preferably overlaps with the side seal portion 4 in whole or in part.

A plurality of elastic members 24 are disposed between the pair of outer fixing regions 27 in the waist stretchable part G <b> 1, and the elastic members 24 are seats 22, 23 in the pair of outer fixing regions 27, respectively. On the other hand, between the outer fixed regions 27, it is not fixed to any of the sheets 22 and 23.
On the other hand, a plurality of elastic members 24 are arranged between the outer fixed region 27 and the main body side fixed region 28 in the waistline lower stretchable part G2, and these elastic members 24 are arranged in the outer fixed region 27. Between the outer fixed region 27 and the main body side fixing region 28, and is not fixed to any of the sheets 22 and 23.

  As shown in FIG. 2, the main body side fixing region 28 may be formed so as to overlap the absorbent main body 3 as a whole, but is formed so as to extend inside and outside the side edge 3 c of the absorbent main body 3. May be. Moreover, the main body side fixing region 28 may be formed outward in the diaper lateral direction from the side edge 3 c of the absorbent main body 3. In addition, in the aspect in which the entire body-side fixing region 28 is overlapped with the absorbent main body 3, the position of the end of the main body-side fixing region 28 on the lateral side of the diaper and the position of the side edge 3 c of the absorbent main body 3 are determined. Both the matching aspect and the aspect in which the main body side fixing region 28 is formed with a predetermined interval between the side edge 3c of the absorbent main body 3 are included.

  In the waist stretchable part G1, a plurality of joint rows 26S are formed at substantially equal intervals in the article lateral direction X. More specifically, a large number are arranged at substantially equal intervals from the vicinity of one outer fixed region 27 to the vicinity of the other outer fixed region 27. The waistline lower stretchable part G2 is also formed with a plurality of rows at substantially equal intervals from the vicinity of one outer fixing region 27 to the vicinity of the other outer fixing region 27. Between the fixed regions 28, the elastic member 24 is not disposed, or the elastic member 24 is disposed in a state in which a process for preventing elastic elasticity such as cutting is performed.

The joint part 26 formed in the waist elastic part G1 and the waist lower elastic part G2 will be described.
As shown in FIG. 3, the joint portion 26 constituting the joint portion row 26 </ b> S formed in the waist stretchable portion G <b> 1 and the joint portion 26 constituting the joint portion row 26 </ b> P formed in the waistline lower stretchable portion G <b> 2 are both as shown in FIG. 3. It has an opening portion m formed so as to overlap the joint portion 26 entirely or partially.
As shown in FIG. 3, the joint portion 26 in the diaper 1 of the present embodiment has left and right joint regions a and b on both sides in the article lateral direction Y of the opening portion m, and the article having the opening portion m. Bonding regions c and d are also provided above and below in the vertical direction X. As a result, as for the junction part 26 in the diaper 1 of this embodiment, the opening part m is surrounded by junction area | region ad over the perimeter,
In the joining regions a to d, the constituent resin of the sheet material constituting the outer layer sheet 22 and / or the inner layer sheet 23 (such as a heat-fusible component of the constituent fibers) is melted and solidified to join the sheets 22 and 23 together. ing. The joint part 26 in the diaper 1 of the present embodiment is formed by a joint part forming step in which the outer layer sheet 22 and the inner layer sheet 23 are overlapped, and the laminated part is subjected to heat embossing. It is formed by subjecting the joint portion of both sheets 22 and 23 formed in the forming process to hole opening processing. Of the entire range of the joint portion formed by the joint portion forming step, portions other than the portion that has become the opening portion m by the opening processing are the joining regions a to d.

In the joining portion forming step, for example, a heat embossing device provided with an embossing roll and an anvil roll, the tip surface of the embossing roll has a convex portion having the same shape as the contour of the joining portion 26. For example, a cutting device provided with a cutter roll and an anvil roll has a shape corresponding to the contour of the hole portion m on the outer peripheral surface of the cutter roll. What has a cutting blade etc. can be used. In order to perform opening processing at the same time as the bonding portion forming step, as the thermal embossing device, the outer peripheral surface of the embossing roll has the same shape as the contour of the bonding portion 26, and the distal end surface thereof, What has the convex part provided with the cutting blade and protrusion of the shape which opposes the outline of the opening part m can be used.
In addition, in the bonding portion forming step and the bonding portion forming step, the opening process is performed in a direction corresponding to the diaper lateral direction of the band-shaped laminate in which the band-shaped outer layer sheet 22 and the band-shaped inner layer sheet 23 are stacked. Alternatively, it may be alternately carried out for each adjacent joint row by two heat embossing devices spaced apart on the upstream side and downstream side of the transport path while continuously transporting in the longitudinal direction.

As in the present embodiment, the periphery of the opening m is surrounded by a joining region where the outer layer sheet 22 and the inner layer sheet 23 are joined over the entire circumference, or FIG. 6A and FIG. As shown in FIG. 6B, when the joining regions a and b exist on both the left and right sides of the opening portion m in the article lateral direction Y, the three sides of the opening portion m are joined as shown in FIG. In the case where the regions a, b, and c are surrounded, the part surrounded by the joint region on the entire circumference and three sides, and the portion sandwiched between the joint regions a and b on both the left and right sides are also included. Considering that it is a part, it is determined whether or not the opening portion m overlaps the whole or a part of the joint portion 26.
In addition, even when the opening portion m is formed so that the whole or a part of the joining portion of the intermediate product formed in the joining portion forming step overlaps, it disappears due to the formation of the opening portion m in the entire range of the joining portion. The part which is made is also regarded as a part of the joint part 26 of the completed diaper (absorbent article), and it is determined whether or not the opening part m overlaps the whole or part of the joint part 26. For example, in the joint portion 26 shown in FIG. 6D and FIG. 6E, both of the joint portions 26 ′ formed in the joint portion forming step disappear when the opening portion m is formed. However, it is assumed that the disappearing portion 26 ′ is also regarded as a part of the joint portion 26, and a part of the opening portion m overlaps the joint portion 26.

  In the waistline lower stretchable part G2 of the diaper 1 of the present embodiment, as shown in FIG. 4, the elastic member 24 (see FIG. 2) disposed in an extended state between the outer layer sheet 22 and the inner layer sheet 23 contracts. Accordingly, the sheet 22 and the sheet 23 between the adjacent joint row 26P are deformed so as to swell in the thickness direction of the exterior body 2, respectively, and the flange 29 made of the sheet 22 or the sheet 23 between the adjacent joint rows 26S. As a result, a hollow portion 30 is formed between the sheets 22 and 23 and surrounded by the flanges 29 and 29.

  Moreover, in the waist expansion-contraction part G1 of the diaper 1 of this embodiment, as shown in FIG. 5, the elastic member 24 (refer FIG. 2) distribute | arranged between the outer layer sheet | seat 22 and the inner layer sheet | seat 23 is shrink | contracted. By doing so, the sheet 22 and the sheet 23 between the adjacent joint row 26S are deformed so as to swell in the thickness direction of the exterior body 2, respectively, and the sheet 22 or the sheets 23, 22R are disposed between the adjacent joint row 26S. As a result, a hollow portion 30 surrounded by the flange 29 and the flange 29 is formed between the sheets 22 and 23.

  In the diaper 1 of the present embodiment, the sheet material constituting the outer layer sheet 22 in each of the ventral side A and the back side B is along the skin contact surface side of the inner layer sheet 23 along the peripheral edge 51 of the waist opening 5. The folded portion 22R covers the skin contact surface side of the inner layer sheet 23 in the waist stretchable part G1 (see FIG. 5). Further, the folded portion 22R is joined to the skin contact surface of the inner layer sheet 23 and / or the absorbent main body 3 by an adhesive which is applied entirely or partially, while being fused to the joint portion 26. It has not been.

As shown in FIG. 4, the opening portion m in the present invention penetrates through the two sheets 22 and 23 joined so as to form the hollow portion 30, and the exterior body 2 (the ventral sheet member 2A or the back). The side sheet member 2B) preferably penetrates the entire sheet, but as shown in FIG. 5, while passing through the two sheets 22 and 23 joined so as to form the hollow portion 30, the penetration The hole may be covered with another sheet and may not penetrate through the exterior body 2 (the ventral sheet member 2A or the back sheet member 2B).
In addition, as a joint part in the present invention, a joint part in which three layers of the outer layer sheet 22, the inner layer sheet 23, and the folded portion 22R are integrated by heat embossing is formed on the waist stretchable part G1, and the like. An opening that penetrates the three layers can also be formed.

According to the diaper 1 of the present embodiment, the joining portion rows 26S and 26P are formed by the joining portions 26 that are intermittently formed in the article longitudinal direction X, and the inside of the heel is hollow between the joining portion rows 26S and 26P. 29 is formed, the concave portion between the ridges 29, 29 formed on the outer surface or the inner surface side of the diaper 1 and the hollow portion 30 when the inner layer sheet 23 is air permeable function as an air passage, and the inside of the diaper 1 Moisture is easily released to the outside, making it difficult to drip. The description “between the joint rows 26S and 26P” means between the joint rows 26S in the waist stretchable part G1 and between the joint rows 26P in the waistline lower stretchable part G2. Such a heel 29 is preferably formed in the waist stretchable part G1 and / or the waistline lower stretchable part G2 at least in a natural state, and a space formed between the heel 29 and the heel 29 even when the article is worn. Is preferably maintained.
Moreover, since the collar 29 is flexibly deformed with respect to the load in the thickness direction of the exterior body 2, the touch of the exterior body 2 is good. Moreover, in the waist stretchable part G1 and / or the waistline lower stretchable part G2 in the diaper 1, the elastic member 24 is disposed between the joint parts 26 adjacent to each other in the longitudinal direction of the article. Since it is not fixed, the collar 29 formed by the sheet 22 or the sheet 23 is more flexibly deformed with respect to the load applied in the thickness direction of the exterior body 2, and is further excellent in touch and the like.

Furthermore, in the diaper 1 of this embodiment, since the opening part m is formed in the joining part 26 which comprises the joining part row | line | columns 26S and 26P so that the whole may overlap with the joining part 26, an opening part Compared to the case where m does not exist, the hardness of the joint portion 26 is reduced. As a result, the flexibility of the waist stretchable part G1 and / or the waistline lower stretchable part G2, and thus the flexibility of the exterior body 2 is improved, and the exterior body 2 is easily bent in the article longitudinal direction X or the article lateral direction Y. .
Improvement of the flexibility of the exterior body has an advantage that, when the exterior body touches the skin, it hits on a wide surface and can give a softer texture.
The exterior body 2 tends to be hard when the pitch P of the joint rows 26S and 26P is narrowed and the size of the flange 29 is relatively small. Therefore, the softening effect of the exterior body by forming the opening part m which overlaps with the junction part 26 is more beneficial in such a case.
The pitch P (see FIG. 3) in the article lateral direction Y of the joint rows 26S and 26P is preferably 5 mm or more, and more preferably 7 mm, from the viewpoint of improving the air permeability by forming a recess between the collar 29 and the collar 29. From the viewpoint of forming beautiful wrinkles in appearance, it is preferably 15 mm or less, more preferably 13 mm or less, and from the viewpoint of both compatibility, preferably 5 mm or more and 15 mm or less, more preferably 7 mm or more and 13 mm or less. .
The pitch P is measured in a state (non-contracted state) in which the stretchable portion is stretched in the lateral direction of the article.

Furthermore, in the diaper 1 of the present embodiment, for both the joint row 26S and the joint row 26P, the joints 26 constituting a plurality of joint rows are arranged in the article lateral direction Y, and the article lateral direction An interval L2 (see FIG. 3) between the joints adjacent to Y is wider than the full width W (see FIG. 3) of the joint 26. By widening the interval L2 between the joint portions 26, it becomes easy to form a ridge 29 having a size that covers the joint portion 26 when pressed between each of the adjacent joint portions in the article lateral direction Y. When the exterior body 2 touches the skin, it becomes difficult for the skin to directly touch the joint portion 26 and the opening portion m. As a result, a softer texture can be given without a sense of incongruity. From such a viewpoint, the ratio (L2 / W) of the distance L2 between the joint portions adjacent in the article lateral direction Y to the total width W of the joint portion is preferably 2 or more, and more preferably 2 or more and 10 or less. preferable.
Further, the distance L2 between the joint portions adjacent to each other in the article lateral direction Y is preferably 4 mm or more, more preferably 6 mm or more, from the viewpoint of improving the air permeability by forming a recess between the flange 29 and the flange. From the viewpoint of forming a beautiful wrinkle in appearance, it is preferably 14 mm or less, more preferably 12 mm or less, and from the viewpoint of both compatibility, it is preferably 4 mm or more and 14 mm or less, more preferably 6 mm or more and 12 mm or less.
The distance L2 between the joint portions adjacent to each other in the article lateral direction is measured in a state where the stretchable portion is stretched in the article lateral direction (non-contracted state).

Moreover, in the diaper 1 of this embodiment, as shown in FIG. 3, the opening part m is formed so that it may be settled in the width W of the article | item horizontal direction Y of the junction part 26 in which it is formed. .
Thereby, it can prevent that the opening part m extends to the collar 29 part, and the opening part m is conspicuous. Making the opening portion m inconspicuous when viewed from the outer surface side of the diaper has an advantage that, for example, there is no concern about leakage and weakness of tensile strength.
In addition, as viewed from the inner surface side of the diaper, the opening portion m is formed so as to be within the width W in the article lateral direction Y of the joint portion 26 where the opening portion is formed. There is an advantage that the cut edge of the sheet does not directly hit the skin.

Here, the opening m is within the width W in the article lateral direction Y of the joint 26 is that the opening m does not extend from both ends of the joint 26 in the same direction in the article lateral direction Y. Means that. 6A, 6B, 6C, 6F, 6G, and 6H, each of the joints 26 shown in FIG. It falls within the width of each joint portion 26.
As shown in FIG. 6D and FIG. 6E, even if the opening m does not fit within the width W in the article transverse direction Y of the joint 26, the article transverse direction of the opening m. The length of Y is preferably 40% or less, more preferably 30% or less of the pitch P of the joint rows 26S and 26P.

Moreover, the junction part 26 in this embodiment has junction area | region a, b on both sides of the article horizontal direction Y of the opening part m, as shown in FIG.
In the diaper 1 of the present embodiment, the ridge 29 formed by the outer layer sheet 22 and the ridge 29 formed by the inner layer sheet 23 intersect with the plurality of elastic members 24 and continuously in the article longitudinal direction X. Although it is an eaves that are beautiful in appearance, the opening portion m has joint regions a and b on both sides sandwiching the opening portion m, so that the opening portion m is expanded in the lateral direction. The deformation of the is suppressed, and the formation of the beautiful wrinkles is further improved.

From the viewpoint of accommodating the opening portion m within the width W of the joint portion 26 and from the viewpoint of forming the joining regions a and b on both sides of the opening portion m, the width W1 of the opening portion m (the length in the lateral direction of the article). ) Is preferably 95% or less, more preferably 90% or less, and preferably 20% or more, more preferably 30% or more, of the total width W of the joint portion 26 (the length in the transverse direction of the article). .
In addition, when the joining regions a and b exist on both the left and right sides of the opening portion m, the lengths La and Lb in the article lateral direction Y of the joining regions a and b are respectively the total width W (the article side) (Length in the direction) is preferably 2.5% or more, more preferably 5% or more, and preferably 47.5% or less, more preferably 45% or less.

As shown in FIG. 3, the joint portion 26 having the joint regions a and b on both sides of the opening portion m is formed of the joint portion 26 in which the opening portion m is surrounded by the joint regions a to c over the entire circumference. In addition, like the joint portion 26 shown in FIGS. 6A and 6B, the joint portion 26 may not have a joint region above, below, or above and below the opening portion m.
As shown in FIG. 3, in addition to the formability of the wrinkles extending in the longitudinal direction of the article, the joining portion 26 in which the opening portion m is surrounded by the joining region over the entire circumference has the tensile strength and the opening portion m. It is excellent in terms of difficulty in deformation.
On the other hand, like the joining portion 26 shown in FIGS. 6A and 6B, the joining portion 26 in which joining regions a and b are formed only on both the left and right sides sandwiching the opening portion m is the longitudinal direction of the article. In addition to the formability of the ridges extending in the direction, it is excellent in terms of lateral bending and softness.
Further, in the joint portion 26 shown in FIG. 6A, the opening portion m extends from the upper and lower ends of the joint portion 26. However, like the joint portion 26 shown in FIG. It is preferable that m does not extend from any of the upper and lower ends of the joint portion 26 from the viewpoint of the shape stability of the aperture portion when the aperture portion is not easily deformed and the stretchable portion is extended in the lateral direction.

Moreover, it is preferable that the junction part 26 is a shape long in the articles | goods longitudinal direction X from the point of the formation property of the beautiful wrinkles extended in the articles | goods longitudinal direction X. More specifically, the joint portion 26 preferably has a ratio (L1 / W) of the length L1 in the article longitudinal direction X to the total width W (length in the article transverse direction Y) of the joint portion 26, which is 1.5. More preferably, it is 2 or more, preferably 12 or less, more preferably 10 or less.
In addition, the opening portion m has a length in the article longitudinal direction X and a length in the article transverse direction Y that are substantially the same as each joint portion 26 shown in FIGS. 6 (f) and 6 (g). The length in the article longitudinal direction X may be longer than the length in the article longitudinal direction X, but the opening portion m also has a length Lm in the article longitudinal direction X as shown in FIG. It is preferable that the length is longer than the length W1 in the direction Y, and it is preferable that the shape is long in the longitudinal direction X of the article, like the joint portion 26. More specifically, in the opening portion m, the ratio (Lm / W1) of the length Lm in the article longitudinal direction X to the length W1 in the article transverse direction Y is preferably more than 1.0, more preferably. Is 1.5 or more, more preferably 2 or more, preferably 12 or less, more preferably 10 or less.

The length Lm in the article longitudinal direction X of the opening m is preferably 50% or more, more preferably 70% or more, and preferably 100% of the length L1 of the joint part 26 in the article longitudinal direction X. Hereinafter, it is more preferably 95% or less, preferably 50% or more and 100% or less, more preferably 70% or more and 95% or less.
Further, when the joining regions c and d exist above and below the opening portion m, the lengths Lc and Ld in the article longitudinal direction X of the joining regions c and d are respectively the lengths in the article longitudinal direction X of the joining portion 26. The thickness L1 is preferably 1% or more, more preferably 5% or more, and preferably 25% or less, more preferably 20% or less.

  In addition, when the joining regions a and b are present on both the left and right sides of the article m in the lateral direction X of the opening portion m and the joining regions c and d are present above and below the opening portion m, a beautiful bag extending in the article longitudinal direction X is provided. From the viewpoint of improving the formability and the flexibility of the wrinkles, the total length (Lc + Ld) in the article longitudinal direction X of the joining regions c and d positioned above and below the opening portion m is the right and left of the opening portion m. It is preferable that it is equal to or smaller than the total length (La + Lb) in the article transverse direction Y of the joining regions a and b located on both sides. Thereby, the hardness of the joining portion 26 is reduced, the exterior body 2 is easily bent in the article lateral direction Y, and the flexibility is improved, and the flange 29 extending in the article longitudinal direction X is easily formed. The expression “equivalent” here includes, for example, a case where the total length (Lc + Ld) is not less than 80% and not more than 120% of the total length (La + Lb). The total length (Lc + Ld) is preferably 120% or less, more preferably 110% or less, still more preferably 100% or less, and preferably 5% or more of the total length (La + Lb). More preferably, it is 10% or more, and further preferably 20% or more. In each joint portion 26 illustrated in FIGS. 6 (g) and 6 (h), the total length (Lc + Ld) in the article longitudinal direction X of the joining regions c and d located above and below the opening portion m is It is less than the total length (La + Lb) in the article transverse direction Y of the joining regions a and b located on the left and right sides of the opening portion m.

The principal part in other embodiment of this invention is shown by FIG. In the embodiment shown in FIG. 7, the outer layer sheet 22 arranged on the side far from the wearer's skin is made of an elastic sheet, and the outer layer sheet, for any of the elastic parts of the waist elastic part G1 and the waistline lower elastic part G2. The inner layer sheet 23 arranged on the side closer to the wearer's skin than 22 is made of a non-stretchable sheet. In the embodiment shown in FIG. 7, the outer layer sheet 22 and the inner layer sheet 23 in an expanded state are overlapped, and the laminated portion is subjected to heat embossing to form a joint portion 26, and at the same time as the step of forming the joint portion. Or the opening part m is given after that and the opening part m is formed. In the embodiment shown in FIG. 7, when the outer layer sheet 22 contracts, the inner layer sheet 23 swells to form a ridge 29, and a space is formed between the sheets 22, 23 of the portion forming the ridge 29. A portion 30 is formed.
As the elastic sheet, for example, a substantially inelastic non-elastic fiber layer is disposed on at least one surface of the elastic fiber layer, and both fiber layers are in a state in which the constituent fibers of the elastic fiber layer maintain the fiber form, A stretchable nonwoven fabric (hereinafter referred to as a stretchable composite nonwoven fabric) bonded by heat fusion can be used.

  When the stretchable composite nonwoven fabric is used as the outer layer sheet 22 and / or the inner layer sheet 23, a thermoplastic fiber such as a styrene elastomer, a polyolefin elastomer, a polyester elastomer or a polyurethane elastomer is used as a constituent fiber of the elastic fiber layer. Fibers made of elastic resin such as elastomer and rubber can be used. Moreover, as a constituent fiber of the inelastic fiber layer, a fiber made of polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide or the like can be used.

As the stretchable composite nonwoven fabric, various known materials can be used. For example, the stretchable sheet described in JP2008-179128A, the stretchable sheet described in JP2007-22066A, JP An elastic nonwoven fabric produced by the method for producing an elastic nonwoven fabric described in 2007-22066, a laminated sheet described in JP-A-10-29259, and the like can also be used.
Either one of the outer layer sheet 22 and the inner layer sheet 23 is made of a stretchable sheet, and by forming a bag 29 made of the other sheet, the elastic body is not conspicuous in the appearance of a diaper or the like, and a silhouette like underwear is given. It becomes possible.

  The diaper 1 described above will be further described. In the side seal portion 4 described above, the outer fixing region 27 on the abdominal side A side and the outer fixing region 27 on the back side B side are overlapped after the joint portion 26 is formed. It is formed by subjecting that part to hot embossing. As a process for forming the joint portion 26, an ultrasonic seal, a laser, or the like can be adopted instead of the heat embossing process, and as a process for forming the side seal part 4, an ultrasonic wave can be used instead of the heat embossing process. Seals, lasers, adhesives and the like can also be employed.

  The absorptive main body 3 has a liquid-permeable top sheet 31, a liquid-impermeable back sheet 32, and an absorber 33 disposed therebetween. The poor liquid permeability includes liquid impermeability and poor liquid permeability. A pair of three-dimensional guard forming sheets 34, 34 are disposed on both sides of the absorbent main body 3. The three-dimensional guard forming sheet 34 has an elastic member 35 for forming a three-dimensional guard in the vicinity of the edge near the longitudinal center line CL of the article, and when the diaper is worn, the edge of the three-dimensional guard forming sheet 34 is caused by the contraction force of the elastic member 35. And a three-dimensional guard is formed by standing so that a portion having a predetermined width is separated from the top sheet 31.

  The material for forming each part of the diaper 1 will be described. The top sheet 31, the back sheet 32, the absorber 33, the three-dimensional guard forming sheet 34, and the like are the same as those conventionally used for this type of absorbent article. Can be used without particular limitation. For example, as the top sheet 31, a liquid-permeable nonwoven fabric, a perforated film, or a laminate thereof can be used, and as the back sheet 32, a resin film or a laminate of the resin film and the nonwoven fabric is used. Can do. As the absorbent body 33, an absorbent core made of a fiber aggregate of fiber materials such as pulp or an absorbent core carrying a superabsorbent polymer thereon is used as a core wrap sheet made of tissue paper or a water-permeable nonwoven fabric. What is wrapped can be used. As the three-dimensional guard forming sheet 34, a stretchable film, a water-repellent nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

As the sheet material constituting 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 flexible and the like. From this point of view, it is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient. In addition, the exterior sheet | seat which consists of a nonwoven fabric, a film, etc. can also be distribute | arranged also to the non-skin contact surface side of the back surface sheet 32 in the crotch part C.
As a material for forming the elastic members 24 and 35, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the material for forming the elastic material include synthetic rubbers 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.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, the exterior body may not be divided into the ventral sheet member 2A and the dorsal sheet member 2B. For example, the outer package may be composed of a single sheet in which the outer layer sheet 22 and the inner layer sheet 23 are continuous across the abdominal part A, the crotch part C, and the back side part B, or the outer layer sheet. 22 is composed of a single sheet continuous over the abdominal side A, the crotch C and the back side B, while the inner layer sheet 23 is disposed only on either the abdominal side A or the back side B. It may be what is being done.
The waistline lower stretchable part G2 may be one that continuously stretches from one side region S to the other side region S. Moreover, the absorbent article of the present invention may have only one of the waist elastic part G1 and the waistline lower elastic part G2. Moreover, the absorbent article of this invention is replaced with what has waist elastic | stretch part G1 and waist part lower elastic part G2 in both the abdominal side part A and the back side part B, instead of the abdominal side part A and the back side part B. Only one or both of the waist stretchable part G1 and the waistline lower stretchable part G2 may be included in either one.

Moreover, the absorbent article of this invention may have the junction part 26 which has the opening part m only in any one of the ventral | abdominal part A and the back | dorsal part B. From the viewpoint of air permeability, it is preferably formed at least on the back side portion B.
Moreover, as shown to Fig.8 (a) and FIG.8 (b), the junction part 26 in which the opening part m was formed in both or one side of the abdominal part A and the back side part B, and the opening part m The joint portion 26 </ b> N that is not formed may be regularly formed. Moreover, both may be formed irregularly.
When both the joint part 26K in which the opening part m is formed and the joint part 26N in which the opening part m is not formed are formed in the ventral part A or the back part B, the ventral part A Alternatively, of the total number of joint portions 26 formed on the back side portion B, the proportion of the joint portions 26K in which the opening portions m are formed is preferably 10% or more from the viewpoint of improving the texture such as softness. Preferably, it is 30% or more, and preferably 50% or less from the viewpoint of not causing leakage or the like.

  Further, the joint portion 26 having the opening portion m is formed near the side seal portion 4 from the viewpoint of preventing leakage and preventing the leakage from being recalled. Preferably, it is not formed, for example, the article side area S of the ventral sheet member 2A (exterior body in the ventral part) or the article side area S of the dorsal sheet member 2B (exterior body in the dorsal part). Then, when the length in the article lateral direction Y is divided into two equal parts and divided into a side close to the absorbent main body 3 and a side close to the side seal portion 4, the joint portion 26 in which the opening portion m is formed, It is preferable that a larger amount be formed on the side closer to the side seal portion 4, and a joint portion 26 having an opening portion m is formed on the side closer to the side seal portion 4, while closer to the absorbent main body 3. On the side, the joint portion 26 having the opening portion m is not formed. A further preferred.

Further, the joint portion 26 may have a rectangular shape as shown in FIG. 3, for example, as shown in FIG. 6 (f) to FIG. Other shapes can also be used. Also, the opening portion m may be other shapes such as a square, an oval, an oval, an ellipse, etc., instead of a rectangular one.
In the opening portion m, it is preferable that a portion that penetrates one of the two sheets joined by the joining portion 26 and a portion that penetrates the other sheet have the same shape and the same size and overlap each other. However, it is not limited to that.

  Moreover, even if the exterior body 2 in the ventral portion A or the back portion B is the diaper 1 described above, only the sheet material constituting the outer layer sheet is folded at the peripheral edge of the waist opening. Although the sheet material constituting the outer layer sheet and the sheet material constituting the inner layer sheet may be folded together, neither the outer layer sheet nor the inner layer sheet may have a folded portion. . In addition, the folded portion of the outer layer sheet or the inner layer sheet may be bonded to the facing surface in a manner different from that of the diaper 1 described above, for example, it may be bonded to the facing surface over the entire region. You can also

  The absorbent article of the present invention is not limited to a pants-type absorbent article, and may be a so-called unfolded disposable diaper. Examples of the pant-type absorbent article include a pants-type disposable diaper for infants or adults, a pants-type sanitary napkin, and the like. The unfolded disposable diaper is typically provided with a fastening tape having a fastening portion made of an adhesive portion or a male member of a mechanical surface fastener on both sides of the back side portion. Fasten and attach to the landing tape on the outside of the side.

  The opening process may be performed before or after the joint forming step. From the viewpoint of forming the opening m at a specific position determined in advance in relation to the joint 26 with high precision, in particular, the opening m that fits within the width W in the article lateral direction of the joint 26 is formed with high precision. From the viewpoint, the opening process is preferably performed at the same time as the bonding portion forming step or after the bonding portion forming step, and more preferably performed simultaneously with the bonding portion forming step.

  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.

  The present invention further discloses the following pant-type absorbent articles and the like with respect to the embodiment (aspect) of the present invention described above.

<1>
An absorptive article having an abdominal side portion disposed on the abdomen side of the wearer, a back side portion disposed on the back side portion of the wearer, and a crotch portion positioned therebetween,
At least one of the abdominal side and the back side has an expansion / contraction part that expands and contracts in the lateral direction of the article,
The stretchable part has an outer layer sheet disposed on the side farther from the wearer's skin and an inner layer sheet disposed on the wearer's skin side than the outer sheet, and is between the outer layer sheet and the inner layer sheet. However, the outer layer sheet and the inner layer between the adjacent joint rows are joined at joint portions arranged in a dotted manner such that a plurality of joint rows along the article longitudinal direction are formed in the article transverse direction. At least one of the sheets is deformed so as to swell in the thickness direction of the stretchable part, so that a hollow part is formed between the two sheets, and the joint part and the whole or one part are formed in the joint part. An absorbent article in which an opening is formed so that the portions overlap.

<2>
The absorbent article according to <1>, wherein the opening is formed so as to be within a width in the article lateral direction of the joint.
<3>
The width (W1) of the opening is preferably 95% or less, more preferably 90% or less, and preferably 20% or more, more preferably 30% or more of the total width (W) of the joint. The absorbent article according to <1> or <2>, wherein
<4>
The absorbent article according to any one of <1> to <3>, wherein the joint portion has joint regions on both sides of the opening portion in the article lateral direction.
<5>
The length (La, Lb) in the article lateral direction of the joint region on both sides of the opening is preferably 2.5% or more of the total width (W) of the joint having the opening, respectively. Preferably it is 5% or more, Preferably it is 47.5% or less, More preferably, it is 45% or less, The absorbent article as described in said <4>.
<6>
In the above <4> or <5>, the joining portion has joining regions also above and below the article longitudinal direction of the opening portion, and the opening portion is surrounded by the joining region over the entire circumference. The absorbent article as described.
<7>
The length (Lc, Ld) in the article longitudinal direction of the joining region above and below the opening is preferably 1% or more, more preferably 5%, of the length L1 of the article longitudinal direction X of the joining part. The absorbent article according to <6> above, which is preferably 25% or less, more preferably 20% or less.
<8>
The elastic part is provided with a plurality of elastic members between the outer layer sheet and the inner layer sheet, and each of the plurality of elastic members passes between joints adjacent to each other in the longitudinal direction of the article. The absorbent article according to any one of <1> to <7>, wherein the absorbent article is disposed in a lateral direction of the article.
<9>
It has a waist elastic part as the elastic part,
In the waist stretchable portion, a plurality of elastic members are disposed between the pair of outer fixing regions, and the elastic members are formed between the outer layer sheet and the inner layer sheet in each of the pair of outer fixing regions. The absorbent article according to any one of <1> to <8>, wherein the absorbent article is fixed between, but is not fixed to either the outer layer sheet or the inner layer sheet between the outer fixed regions.

<10>
It has a waist lower elastic part as the elastic part,
A plurality of elastic members are arranged between the outer fixed region and the main body side fixing region in the lower waist extension part, and these elastic members are respectively provided in the outer fixing region and the main body side fixing region. In the above, between the outer layer sheet and the inner layer sheet, while being fixed between the outer layer region and the main body side fixing region, neither the outer layer sheet nor the inner layer sheet, <1> to The absorbent article according to any one of <9>.
<11>
The pitch (P) in the article lateral direction of the joint row is preferably 3 mm or more, more preferably 4 mm or more, still more preferably 5 mm or more, still more preferably 7 mm or more, and preferably 15 mm or less, more preferably 13 mm. Or less, more preferably 10 mm or less, preferably 3 mm or more and 15 mm or less, more preferably 5 mm or more and 15 mm or less, and still more preferably 7 mm or more and 13 mm or less, in any one of the above items <1> to <10> The absorbent article as described.
<12>
The length in the article lateral direction of the opening portion is preferably 40% or less, more preferably 30% or less of the article lateral pitch (P) of the joint row, <1> to < The absorbent article according to any one of 11>.
<13>
The absorbent article according to any one of <1> to <12>, wherein the joint portion has a shape that is long in the longitudinal direction X of the article.
<14>
The joint part has a ratio (L1 / W) of the length (L1) in the longitudinal direction of the article to the total width (W) of the joint part, preferably 1.5 or more, more preferably 2 or more, The absorbent article according to any one of <1> to <13>, preferably 12 or less, more preferably 10 or less.
<15>
The opening portion preferably has a length Lm in the article longitudinal direction X longer than a length W1 in the article transverse direction Y, more preferably a shape elongated in the article longitudinal direction, and a length in the article longitudinal direction X. The ratio of Lm to the length W1 in the article transverse direction Y (Lm / W1) is 1.5 or more, more preferably 2 or more, preferably 12 or less, more preferably 10 or less, <1 The absorbent article according to any one of> to <14>.
<16>
The length (Lm) in the longitudinal direction of the article of the opening is preferably 50% or more, more preferably 70% or more of the length (L1) in the longitudinal direction of the joint. 100% or less, More preferably, it is 95% or less, Preferably it is 50% or more and 100% or less, More preferably, it is 70% or more and 95% or less, Any one of said <1>-<15>. Absorbent articles.
<17>
The absorbent article according to any one of <1> to <16>, wherein the outer layer sheet or the inner layer sheet is made of a stretchable nonwoven fabric.
<18>
The absorbent article according to any one of <1> to <17>, wherein the joint portion in which the opening portion is formed and the joint portion in which the opening portion is not formed are regularly formed. .
<19>
<1> to <18>, in which the ratio of the joint portion in which the opening portion is formed is 10% or more of the total joint portion formed in the abdominal side portion or the back side portion in which the joint portion is provided. The absorbent article according to any one of 1.

<20>
Of the total number of joints formed in the ventral part or the dorsal part, the proportion of joints in which apertures are formed is 10% or more, preferably 30% or more, and preferably 50 % Of the absorbent article according to any one of <1> to <19>.
<21>
An outer layer sheet in each of an abdominal part and a dorsal part, comprising an exterior body and an absorbent main body fixed to the exterior body, wherein the stretchable part is a pants-type absorbent article formed on the exterior body Is folded to the skin contact surface side of the inner layer sheet along the peripheral edge portion of the waist opening, and the folded portion is entirely or partially coated by the adhesive applied to the inner layer sheet. The absorbent article according to any one of <1> to <20>, wherein the absorbent article is bonded to the skin contact surface of the absorbent main body and is not fused to the bonded portion.
<22>
A pants-type absorbent article having an exterior body and an absorbent main body fixed to the exterior body, wherein the stretchable part is formed in the exterior body;
Any one of the above <1> to <21>, wherein the opening portion penetrates two sheets joined so as to form a hollow portion and penetrates the entire exterior body in the thickness direction. Or an absorbent article according to claim 1.
<23>
A pants-type absorbent article having an exterior body and an absorbent main body fixed to the exterior body, wherein the stretchable part is formed in the exterior body;
The opening portion penetrates through two sheets joined so as to form a hollow portion, while the through hole is covered with another sheet and does not penetrate the exterior body, <1> to The absorbent article according to any one of <21>.
<24>
In the waist stretchable part, the absorbent article according to any one of the above items <1> to <23>, wherein the positions of the joint parts in the article longitudinal direction are substantially the same for all joint rows.

<25>
The joint portion has joint regions on both sides of the article in the transverse direction of the opening and in the top and bottom of the article longitudinal direction, and the total length in the article longitudinal direction of the joint region located above and below the opening portion ( Lc + Ld) is equal to or smaller than the total length (La + Lb) in the article lateral direction of the joining region located on both sides of the opening portion, and is smaller than the total length (La + Lb). 24> The absorbent article according to any one of 24>.
<26>
The total length (Lc + Ld) is preferably 120% or less, more preferably 110% or less, still more preferably 100% or less, and preferably 5% or more of the total length (La + Lb). The absorbent article according to <25>, more preferably 10% or more, and still more preferably 20% or more.
<27>
The joints constituting the joint row are arranged in the article lateral direction, and the interval (L2) between the joints adjacent to each other in the article lateral direction Y is wider than the full width (W) of the joint, <1 The absorbent article according to any one of> to <26>.
<28>
The joints forming the joint row are arranged in the article lateral direction, and the ratio (L2 / W) of the interval (L2) between the joints adjacent in the article lateral direction Y to the total width (W) of the joints. Is 2 or more, Preferably it is 2 or more and 10 or less, The absorbent article in any one of said <1>-<27>.
<29>
The joints constituting the joint row are arranged in the article lateral direction, and the interval (L2) between the joint parts adjacent to each other in the article lateral direction Y is preferably 4 mm or more, more preferably 6 mm or more. Is 14 mm or less, More preferably, it is 12 mm or less, Preferably it is 4 mm or more and 14 mm or less, More preferably, it is 6 mm or more and 12 mm or less, The absorbent article in any one of said <1>-<28>.

<30>
An exterior body and an absorptive main body fixed to the exterior body, wherein the stretchable part is formed in the exterior body, and the exterior body on the abdominal side and the exterior body on the back side are a pair of side seals Pants-type absorbent articles joined to each other in the part,
The article side area of the exterior body in the abdominal side or the article side area of the exterior body in the back side is divided into two in the lateral direction of the article, and the side close to the absorbent main body and the side seal part are close to each other. The absorption according to any one of the above <1> to <29>, wherein, when divided into the side, a larger number of joint portions in which the opening portions are formed are formed closer to the side seal portion. Sex goods.
<31>
An abdominal sheet member, a back sheet member, and an absorbent main body, and the absorbent main body spans an article lateral direction central portion of the ventral sheet member and an article lateral direction central portion of the back side sheet member. Is a pants-type absorbent article in which the ventral sheet member and the back sheet member are joined to each other at the pair of side seal parts,
The article side area of the abdominal sheet member or the article side area of the back sheet member is divided into two parts by dividing the length in the article lateral direction into a side close to the absorbent main body and a side close to the side seal part. The absorbent article according to any one of the above items <1> to <30>, wherein the bonded portion in which the opening portion is formed is formed more on the side closer to the side seal portion.
<32>
On the side close to the side seal portion, a joint having an opening is formed, whereas on the side close to the absorbent main body, no joint having an opening is formed, <30> or <31> The absorbent article according to any one of 31>.

1 disposable diaper (absorbent article)
2 exterior body 2A ventral side sheet member 2B back side sheet member 22 outer layer sheet 23 inner layer sheet 22R folded portion 24 elastic member 26 joint portion m opening portion 26S joint portion row 26P joint portion row 27 outer side fixed region 28 main body side fixed region 29 ３０ 30 Hollow part 3 Absorbent body 31 Top sheet 32 Back sheet 33 Absorber 34 Three-dimensional guard forming sheet 35 Elastic member 4 Side seal part 5 Waist opening part 6 Leg opening part A Abdominal side part B Back side part C Crotch part D Girth part G1 Waist elastic part G2 Girth lower part elastic part

Claims (14)

An absorptive article having an abdominal side portion disposed on the abdomen side of the wearer, a back side portion disposed on the back side portion of the wearer, and a crotch portion positioned therebetween,
At least one of the abdominal side and the back side has an expansion / contraction part that expands and contracts in the lateral direction of the article,
The extendable portion includes an outer layer sheet that is disposed farther from the skin of the wearer, has an inner layer sheet than the outer layer sheet Ru disposed closer to the wearer's skin, the said outer sheet inner sheet Between the adjacent joint rows, the outer layer sheets being joined at the joints arranged in a scattered manner so that a plurality of joint rows along the article longitudinal direction are formed in the article transverse direction. And at least one of the inner layer sheets is deformed so as to swell in the thickness direction of the stretchable part, and a hollow part is formed between the two sheets, and all or a part of the joint part is formed. , An opening is formed so that the whole or a part of the joint overlaps ,
A plurality of the joint portions are formed in the stretchable portion so as to form a line along the article lateral direction, and a plurality of rows of the transverse joint sections formed of the plurality of joint parts are spaced apart in the article longitudinal direction. Formed,
The elastic part is provided with a plurality of elastic members between the outer layer sheet and the inner layer sheet, and the plurality of elastic members are respectively connected to the lateral joint part rows adjacent to each other in the longitudinal direction of the article. It is arranged to extend in the lateral direction through the article,
All or some of the plurality of rows of the lateral joint rows are joint rows arranged such that the joints in which the opening portions are formed form a row along the article lateral direction. ,
The joint portion having the opening portion and the opening portion have a vertically long shape that is long in the longitudinal direction of the article,
The absorptive article whose ratio of the above-mentioned joined part in which the above-mentioned opening part was formed is 10% or more and 50% or less among the number of all the above-mentioned joined parts which the above-mentioned expansion-contraction part of the ventral part or back side part has . In the plurality of rows of the horizontal joint portions, the joint portions arranged so that the joint portions in which the hole portions are formed are arranged in a row along the article lateral direction, and the hole portions are formed. The absorptive article according to claim 1 including both said joint part which is arranged so that said non-joining part may form a line along the article transverse direction. The joining portion in which the opening portion is formed has joining regions on both sides of the opening portion in the lateral direction of the article and in the vertical direction of the article, and the joining portion is located above and below the opening portion. The total length (Lc + Ld) in the longitudinal direction of the article is equal to or greater than the total length (La + Lb) in the lateral direction of the article in the joining region located on both sides of the opening. The absorbent article according to claim 1 or 2, which is small. The absorbent article according to claim 1 or 2 , wherein the opening portion is formed so as to be within a width in the article lateral direction of the joint portion where the opening portion is formed . An absorptive article having an abdominal side portion disposed on the abdomen side of the wearer, a back side portion disposed on the back side portion of the wearer, and a crotch portion positioned therebetween,
At least one of the ventral portion and the dorsal side portion has a stretchable portion that stretches in the lateral direction of the article,
The stretchable part has an outer layer sheet disposed on the side farther from the wearer's skin, and an inner layer sheet disposed closer to the wearer's skin than the outer layer sheet, the outer layer sheet and the inner layer sheet, Are joined at joints arranged in a dotted manner so that a plurality of joint rows along the article longitudinal direction are formed in the article transverse direction, and the outer layer sheet between the adjacent joint rows, and At least one of the inner layer sheets is deformed so as to swell in the thickness direction of the stretchable part, and a hollow part is formed between the two sheets. An opening is formed so that the whole or part of the joint overlaps,
The opening portion has a bonding region around which the outer layer sheet and the inner layer sheet are bonded and a region where the outer layer sheet and the inner layer sheet are not bonded, and the opening portion. Is an absorbent article that is formed so as to be within a width in the article lateral direction of the joint part in which the opening is formed. The absorptive article according to claim 5 in which a plurality of said elastic members are arranged in a transverse direction of an article through between joints adjacent to each other in the longitudinal direction of the article. The absorptive article according to claim 5 or 6 in which said joined part in which said opening part was formed, and said joined part in which said opening part is not formed are formed regularly. . The ratio of the said junction part in which the said opening part was formed among the number of all the said junction parts which the said expansion-contraction part of a ventral part or a back side part has is 10% or more, Any of Claims 5-7 the absorbent article according to any one of claims. The absorbent article according to any one of claims 5 to 8, wherein the opening portion has a length in the longitudinal direction of the article that is longer than a length in the transverse direction of the article. The absorbent article according to any one of claims 4 to 9, wherein the joint portion in which the opening portion is formed has joint regions on both sides of the opening portion in a lateral direction of the article. The absorbent article according to any one of claims 1 to 10 , wherein a pitch (P) in an article lateral direction of the joint row along the article longitudinal direction is 7 mm or more and 13 mm or less. The joint portions constituting the plurality of rows of the joint portions along the article longitudinal direction are arranged in the article lateral direction, and the entire width (W) of the joint portions at the interval (L2) between the joint portions adjacent in the article lateral direction. The absorptive article according to any one of claims 1 to 11 whose ratio (L2 / W) to is 2 or more. The joints constituting the joint row of the plurality of rows along the article longitudinal direction are arranged in the article lateral direction, and the interval (L2) between the joint parts adjacent in the article lateral direction is 6 mm or more and 12 mm or less. Item 13. The absorbent article according to any one of Items 1 to 12. The absorptive article according to any one of claims 1 to 13 in which said outer layer sheet or said inner layer sheet consists of an elastic nonwoven fabric.

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