JP2023082626A - Pants type wearing article - Google Patents

Abstract

To provide a pants type wearing article quickly allowing wearing and leg openings to be checked.SOLUTION: A pants type wearing article 10 comprises a ventral part disposed on an abdominal side of a wearer, a crotch part disposed on a crotch side 10C, and a back part disposed on a back side, and has a direction around a waist and a height direction Y. The pants type wearing article comprises a waist opening disposed on the upper side of the ventral part and the back part in the height direction, and a pair of leg openings disposed on the right and left of the crotch part. A back-side outer cover body 22 has, on a skin side and a non-skin side of the back-side outer cover body of a region 3 on the leg opening side, a skin side elastic region and a non-skin side elastic region with elasticity necessary for expansion and contraction at least in the direction around the waist, and also has an elastic overlapping part 4 where these regions overlap each other in the thickness direction of the back-side outer cover body. In the part, the shrinkage factor of the skin side elastic region in the direction around the waist is smaller than that of the non-skin side elastic region in the direction around the waist. The back-side outer cover body has, on the outer side of the leg openings of the crotch part, a pleat part 81 which overlaps the overlapping part.SELECTED DRAWING: Figure 4

Description

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

Wearing articles such as diapers have forms such as a tape type and a pants type.
A pants-type wearing article has a waist opening in the upper part and leg openings on the left and right sides of the crotch part. The waist opening and the leg opening are provided with an elastic body (stretchable member) such as rubber thread, and have a structure with good fit to the body. Patent Literatures 1 and 2 describe techniques for improving wearing comfort, such as prevention of curling up of the waist end portion and prevention of marks, by devising the configuration of elastic members arranged around the waist.

Pants-type wearing articles such as those described above are intended mainly for wearers who are relatively equipped with a function of exercising their legs. For example, in the case of diapers for infants, tape-type diapers are used for young children such as newborns and infants. It will switch. In the case of adult diapers, pants-type diapers are mainly intended for elderly people who can walk by themselves or with assistance.

In the case of infants, elderly people who need assistance, and the like, people around them act as fitting workers and make the wearer wear the garment. For example, when an infant is put on, a parent or the like puts his/her hands through the leg openings and the waist opening of a pants-type diaper to widen the diaper so that the wearer can put it on smoothly. At that time, the guardian may hold the wearer's leg with the hand passed through the diaper and make the wearer put it on while preventing the leg from flapping. The above-mentioned procedure of letting the elderly wear the shoes through their hands may be performed by a caregiver or the like.

JP 2016-150150 A Japanese Unexamined Patent Application Publication No. 2011-235020

However, since the pants-type wearing article as described above is highly stretchable in order to improve the material and fit to the wearer, the article is in a contracted state before being worn. In addition, immediately after being taken out of the package, it is in a flattened state, and the leg openings are contracted and have a reduced diameter. In this case, the leg opening is obscured by the surrounding constricted folds.
In such a contracted state, it is difficult to visually check the leg openings when worn. In addition, it takes a long time to confirm the leg opening when searching for the leg opening with the touch of the fingertip in a place where the lighting is relatively dim such as at night. In either case, it is difficult to confirm the position of the leg opening, and even if it can be confirmed, it must be opened by separating the surrounding folds. As a result, it is difficult to quickly insert the hand into the leg opening as described above, and the load of the fitting work increases.

In view of the above points, the present invention relates to the provision of a pants-type wearing article that allows a wearer to quickly check the leg openings when the wearer wears the wearable article on a person to be worn, and to quickly wear the wearable article. .

The present invention is a pants type having an abdominal portion arranged on the abdominal side of the wearer, a crotch portion arranged on the crotch side, and a back portion arranged on the back side, and having a waist circumference direction and a body length direction. An article of wear,
The pants-type wearing article includes a waist opening arranged above the abdominal portion and the dorsal portion in the length direction, and a pair of leg openings arranged on the left and right sides of the crotch portion,
The back outer body forming the outer surface main body of the back part has elasticity necessary for stretching at least in the waist circumference direction on the skin side and the non-skin side of the back outer body in the region on the leg opening side. having a skin-side elastic region and a non-skin-side elastic region,
The back-side exterior body has an elastic overlapping portion in which the skin-side elastic region and the non-skin-side elastic region overlap each other in the thickness direction of the back-side exterior body. The shrinkage ratio of the region in the waist circumference direction is smaller than the shrinkage ratio of the non-skin-side elastic region in the waist circumference direction, and the back exterior body is connected to the overlapping portion outside the leg opening of the crotch portion. having folds,
A pants-type wearing article is provided.

ADVANTAGE OF THE INVENTION The pants-type wearing article of the present invention allows the wearer to quickly check the leg openings when the wearer wears the wearable article on the wearer, so that the wearer can quickly wear the underpants-type wearing article.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view schematically showing an underpants-type diaper as a preferred embodiment of the underpants-type wearing article according to the present invention; FIG. 2 is a partially cut-out development plan view schematically showing a state in which the underpants-type diaper shown in FIG. FIG. 2 is a perspective view schematically showing a wearing state of the underpants-type diaper shown in FIG. 1 as viewed from the left leg opening side together with the overlapping portion of the back portion; FIG. 3 is a sectional view taken along line IV-IV in the pants-type diaper shown in FIG. 2; FIG. 4 is a cross-sectional view along the body length direction of the dorsal portion showing an example of the arrangement of the outer layer elastic bodies and the inner layer elastic bodies that constitute the overlapping portion. FIG. 10 is a cross-sectional view of the dorsal portion taken along the body length direction, showing another example of the arrangement of the outer layer elastic body and the inner layer elastic body that constitute the overlapping portion; FIG. 10 is a cross-sectional view of the dorsal portion taken along the body length direction, showing still another example of the arrangement of the outer layer elastic bodies and the inner layer elastic bodies that constitute the overlapping portion; FIG. 10 is a cross-sectional view of the dorsal portion taken along the body length direction, showing still another example of the arrangement of the outer layer elastic bodies and the inner layer elastic bodies that constitute the overlapping portion; 4A and 4B are explanatory diagrams schematically showing various intersection points for measuring the shrinkage ratio in the waist circumference direction when the inner layer elastic body has an extension direction that intersects with the waist circumference direction X. FIG. . FIG. 10 is an explanatory view schematically showing another example of the arrangement of the inner layer elastic bodies shown in FIG. 9; (A) is a cross-sectional view schematically showing a cross section along the waist circumference direction of the dorsal portion including the overlapping portion from the waist opening side, and (B) is an operation diagram of the overlapping portion shown in (A). is. FIG. 4 is a perspective view showing the state of folds around the leg openings at the stage when the pants-type diaper shown in FIG. 1 is put on. 2 is a partially cutaway plan view of a preferred embodiment of the arrangement of outer layer elastic bodies and inner layer elastic bodies in the back outer packaging of the pants-type diaper shown in FIG. 1, viewed from the non-skin side of the back outer packaging. FIG. FIG. 14 is a cross-sectional view taken along the line VIII-VIII in the back exterior body shown in FIG. 13; Another preferred embodiment of the arrangement of the outer layer elastic bodies and the inner layer elastic bodies in the back outer packaging of the pants-type diaper shown in FIG. 1 is a partially cutaway plan view seen from the non-skin side of the back outer packaging. be. FIG. 16 is an explanatory view schematically showing an intersection portion between an outer layer elastic body and an inner layer elastic body in the back exterior body shown in FIG. 15; Fig. 5 is a cross-sectional view schematically showing a preferred embodiment of a combination of the dorsal outer covering and the ventral outer covering at a cross-sectional position corresponding to the cross-sectional view shown in Fig. 4;

A preferred embodiment of the pants-type wearing article of the present invention will be described below with reference to the drawings.
In this specification, the side that contacts the wearer's skin is referred to as the skin side or inner side, and the opposite side is referred to as the non-skin side or outer side. These terms are also used as terms that indicate relative positional relationships in the member configuration of the absorbent article, even for members that do not have a surface that contacts the wearer's skin. Further, the direction located in front of the wearer when worn is referred to as the front or front side, and the direction located in the rear side is referred to as the rear or rear side. The direction normal to the front or back surface of the worn article, that is, the lamination direction of the members, is referred to as the thickness direction.

As shown in FIG. 1, a pants-type diaper 10 (hereinafter also referred to as a diaper 10) of this embodiment includes an abdominal portion 10F arranged on the abdominal side of the wearer and a crotch portion 10C arranged on the crotch side. , and a back portion 10R arranged on the back side, and have a waist circumference direction X and a body length direction Y. The diaper 10 also includes a waist opening 12 arranged above the ventral portion 10F and the back portion 10R in the length direction Y, and a pair of leg openings 13, 13 arranged on the left and right sides of the crotch portion 10C. .

The diaper 10 has an absorbent body 1 and an outer body 2 as constituent members. The exterior body 2 has a ventral exterior body 21 and a dorsal exterior body 22 that form external bodies of the ventral part 10F and the dorsal part 10R, respectively. Both side edges of the abdominal exterior body 21 and the dorsal exterior body 22 are overlapped and joined at the side seal portion 11 . Thereby, an annular waist portion 10D of the diaper 10 is formed. Bonding at the side seal portion 11 can be performed by various methods used for this type of article. For example, fusion bonding (eg, heat sealing, ultrasonic sealing, laser melting), pressure bonding (eg, embossing), and other consolidation bonding can be used.
Further, the back exterior body 22 extends to the crotch portion 10C from the position of the side seal portion 11 in the length direction Y. As shown in FIG. The extending portion forms a crotch-side extending portion 8 that covers a part of the absorbent main body 1 on the non-skin side of the crotch portion 10C. The crotch-side extending portion 8 is arranged as an external main body on the buttock side of the crotch portion 10C. In the crotch part 10</b>C, the ends of the crotch-side extension part 8 in the waist circumference direction X form frill-like folds 81 arranged outside the leg openings 13 , 13 . The folds 81 are portions where the back exterior body 22 extends, and the folds 81 and the back exterior body 22 are seamlessly integrated. The crotch-side extension 8 may have various shapes that cover a portion of the non-skin surface side of the absorbent body 1 and form the folds 81 on the outside of the leg openings 13 . Among them, the crotch-side extending portion 8 has a waist that extends from the lower edge of the left and right side seal portions 11, 11 toward the crotch portion 10C from the viewpoint of suppressing clinging around the legs of the wearer and improving the wearing comfort. It is preferable to have a curved shape such that the width in the circumferential direction X gradually narrows.
The absorbent main body 1 is arranged on the skin side of the outer body 2 in the ventral portion 10F and the dorsal portion 10R, and the extended portion forms a crotch portion 10C.
In the diaper 10 having such a configuration, the open portion above the waist portion 10D serves as the waist opening portion 12 described above. The left and right open portions of the crotch portion 10C are the pair of leg openings 13, 13 described above.

FIG. 2 shows the diaper 10 in an unfolded state with the side seal portions 11, 11 broken. Here, the unfolded state refers to a state in which each part is stretched and the pants-type absorbent article is spread flat. In the unfolded state, the aforementioned waist direction X and body length direction Y are also referred to as the width direction X and the longitudinal direction Y. As shown in FIG.
In the unfolded state of the diaper 10, oblong abdominal exterior bodies 21 and dorsal exterior bodies 22 are arranged corresponding to the ventral part 10F and the dorsal part 10R, respectively. The vertically elongated absorbent main body 1 is arranged on the skin side of the abdominal exterior body 21 and the dorsal exterior body 22 with its longitudinal direction directed toward the abdomen side portion 10F, the crotch portion 10C and the dorsal portion 10R of the diaper 10. ing. The skin side of the ends of the absorbent main body 1 in the longitudinal direction Y are covered with the folded-back portions 23, 23 of the abdominal exterior body 21 and the dorsal exterior body 22 arranged on the non-skin side.
The absorbent main body 1, as shown in FIG. It has a liquid-retaining absorber 16 with a Furthermore, the absorbent main body 1 is provided with a pair of side sheets 17 on both sides in the longitudinal direction Y. As shown in FIG. A leg gather elastic body 18 joined in a stretched state along the longitudinal direction Y is arranged on the outer end portion of the side sheet 17 in the width direction X to form a leg gather around the leg opening 13. there is

Next, the back exterior body 22 will be described.
The back exterior body 22 forming the outer surface main body of the back portion 10R has a skin side and a non-skin side of the back exterior body 22 in the region 3 (hereinafter also simply referred to as region 3) on the side of the leg openings 13, 13. , a skin-side elastic region and a non-skin-side elastic region having elasticity necessary for stretching at least in the waist circumference direction X. The back-side exterior body 22 has an elastic overlapping portion 4 in which the skin-side elastic region and the non-skin-side elastic region overlap each other in the thickness direction of the back-side exterior body 22 .
In the overlapping portion 4, the shrinkage ratio in the waist circumference direction X of the skin-side elastic region is smaller than the shrinkage ratio in the waist circumference direction X of the non-skin-side elastic region. The overlapping portion 4 continues with the folds 81 arranged outside the leg openings 13, 13 of the crotch portion 10C.

As shown in FIGS. 2 and 3, the region 3 having the overlapped portion 4 is located on the side of the leg openings 13, 13 in the length range of the side seal portions 11, 11 in the length direction Y in the back exterior body 22. position. At this position in the length direction Y, the region 3 is a region connecting the side seal portions 11, 11 in the waist circumference direction. In the region 3 described above, an "overlapping portion 4" is arranged. The "overlapping portion 4" may be in the entire region 3 or in a part of the region 3 as long as the shrinkage difference, which will be described later, can be satisfactorily expressed.
The position of the region 3 in the length direction Y is within 60% of the length in the length direction Y corresponding to the side seal portions 11, 11 of the back outer body 22 from the crotch side edge. More preferably, it is within a range of 45%, and more preferably only at the lower end of the back exterior body 22 . With the above range, the action of the contractile force provided by the overlapped portion 4 can more effectively cause the folds 81 in the crotch-side extending portion 8 to warp. In addition, since the region 3 having the overlapping portion 4 is located in a portion of the crotch side of the back exterior body 22 as described above, an increase in the thickness of the back exterior body 22, especially the thickness of the waist circumference portion 222 is suppressed. , good fit, etc. can be maintained.

Moreover, as shown in FIG. 3 , in the wearing state of the diaper 10 , the overlapping portion 4 corresponds to the wearer W's lower waist region to upper buttock region. A crotch-side extending portion 8 extending from the overlapping portion 4 toward the crotch portion 10C is applied to a position covering the wearer's W buttocks. The folds 81 on both the left and right sides of the crotch-side extension 8 are applied to positions covering the bases of the left and right legs of the wearer W and the rear sides of the legs.

The overlapping portion 4 can be formed with various structures.
For example, the overlapping portion 4 may be formed by a laminated structure including an outer layer portion, an intermediate layer portion, and an inner layer portion arranged in the region 3 . The middle layer portion is a middle layer sheet composed of a sheet material, the inner layer portion on the skin side of the middle layer sheet includes the aforementioned skin side elastic region, and the outer layer portion on the non-skin side of the middle layer sheet has the aforementioned non-skin side elasticity. Including area. In this manner, the skin-side elastic region and the non-skin-side elastic region are arranged at positions overlapping each other in the thickness direction of the back-side exterior body 22 with the intermediate layer sheet interposed therebetween.
Moreover, the above laminated structure may be composed of the outer layer portion and the inner layer portion without the intermediate layer portion interposed therebetween.
The elasticity in the skin-side elastic region and the non-skin-side elastic region of the overlapped portion 4 can be formed by various members having extensible elasticity. Examples of the member include a long elastic body and a stretchable sheet. For example, in the laminated structure including the outer layer portion, the middle layer portion, and the inner layer portion, the outer layer portion and the inner layer portion may be formed including a stretchable long elastic body or a stretchable stretchable sheet.

An example of a preferred embodiment of the overlapping portion 4 to which elasticity is imparted using an elastic body will be described below with reference to FIGS. 2 and 4. FIG.

As shown in FIGS. 2 and 4, the overlapping portion 4 of the region 3 of the back exterior body 22 is composed of an outer layer sheet 61 made of a sheet material constituting the outer surface on the non-skin side, an outer layer sheet 61 and an intermediate layer sheet 62. It has an outer layer elastic body 71 which is interposed between and is joined and fixed so as to be extensible. The outer layer sheet 61 and the outer layer elastic body 71 form an outer layer portion of the intermediate layer sheet 62 on the non-skin side. The outer layer elastic body 71 is arranged so as to extend in at least the waist circumference direction X. As shown in FIG. Specifically, the outer layer elastic body 71 is thread-like or string-like, and a plurality of pieces are joined and fixed to the left and right side seal portions 11 while extending inward in the waist circumference direction X so as to connect the side seal portions 11 . extending towards. The aforementioned non-skin-side elastic region includes the outer layer elastic body 71 .
The overlapping portion 4 of the region 3 of the back exterior body 22 is interposed between the inner layer sheet 63 made of the sheet material constituting the inner surface of the skin side, and the inner layer sheet 63 and the middle layer sheet 62 so as to be stretchable. It has an inner layer elastic body 72 that is joined and fixed. This forms an inner layer portion on the skin side of the intermediate layer sheet 62 . The inner layer elastic body 72 is arranged so as to extend in at least the waist circumference direction X. As shown in FIG. Specifically, the inner layer elastic body 72 is thread-like or cord-like, and a plurality of the inner layer elastic bodies 72 are joined and fixed to the left and right side seal portions 11, 11, and at least a portion of the inner layer elastic body 72 extends inward in the waist circumference direction X from there. Extends in the waist circumference direction X in the range. The aforementioned skin-side elastic region includes the inner layer elastic body 72 .

The joints between the members of the back exterior body 22 can be formed by various means commonly used in this type of article. For example, the members are integrated by fusion bonding, pressure bonding, or bonding using a highly fluid adhesive such as a hot-melt adhesive. The method of applying the hot melt adhesive or the like is not particularly limited, and may be, for example, either a contact method or a coating method. For example, it can be applied by a method such as spraying the adhesive along the direction in which the elastic body is arranged. Such joining can also be used for joining various members as described below.

The outer layer elastic body 71 and the inner layer elastic body 72 provide elasticity required for expansion and contraction in at least the waist circumference direction X to at least a partial region extending inward from the side seal portions 11 , 11 . The outer layer elastic body 71 and the inner layer elastic body 72 are arranged at positions overlapping each other in the thickness direction to form an overlapping portion 4 . The overlapping portion 4 extends inwardly in the waist circumference direction X from the left and right side seal portions 11, 11 in the aforementioned region 3, or extends in the waist circumference direction across the left and right side seal portions 11, 11. distributed throughout X. Note that the above-mentioned "overlapping position" is not limited to the case where the outer layer elastic body 71 and the inner layer elastic body 72 overlap strictly in the thickness direction. to say that it is in close proximity.

(Method of defining the range of the overlapping portion 4 in the length direction Y)
The range of the overlapping portion 4 in the length direction Y can be defined by the following method.
(1) How to determine the end of the overlapping position on the leg opening 13 side The distance from the end of the back exterior body 22 on the waist opening 12 side to the end of the inner layer elastic body 72 on the leg opening 13 side is 7A. do. The distance from the end of the back exterior body 22 on the side of the waist opening 12 to the end of the leg opening 13 of the outer layer elastic body 71 is defined as 7B. In this case, the end of the elastic body having the shortest distance is defined as the end on the leg opening 13 side of the overlapping position.
(2) How to determine the end of the overlapping position on the side of the waist opening 12 The distance from the end of the back exterior body 22 on the side of the waist opening 12 to the end of the inner layer elastic body 72 on the side of the waist opening 12 is 7C. do. The distance from the end of the back exterior body 22 on the waist opening 12 side to the end of the outer layer elastic body 71 on the waist opening 12 side is 7D. In this case, the end of the elastic body with the longer distance is the end on the waist opening 12 side of the overlapping position.
(3) The range sandwiched between both ends of (1) and (2) above is defined as the range in the height direction Y of the overlapping portion 4 . Various patterns can be employed for the arrangement of the outer layer elastic bodies 71 and the inner layer elastic bodies 72 forming the overlapped portion 4 divided in this manner in the length direction Y. As shown in FIG. For example, four aspects as shown in FIGS. 5-8 may be included.
In the embodiment shown in FIG. 5, the above various distances have the relationships 7A<7B, 7C>7D, and 7A>7C. In this case, the leg opening 13 side end of the overlapping position is identified as the leg opening 13 side end of the inner layer elastic body 72 indicated by the short distance 7A. The end of the overlapping position on the side of the waist opening 12 is specified as the end of the inner layer elastic body 72 on the side of the waist opening 12 indicated by the long distance 7C. The range sandwiched between the two ends, ie, the range obtained by subtracting the distance 7C from the distance 7A, is defined as the range in the height direction Y of the overlapping portion 4. As shown in FIG.
In the embodiment shown in FIG. 6, the various distances described above have the relationships 7A>7B, 7C>7D, and 7B>7C. In this case, the leg opening 13 side end of the overlapping position is identified as the leg opening 13 side end of the outer layer elastic body 71 indicated by the short distance 7B. The end of the overlapping position on the side of the waist opening 12 is specified as the end of the inner layer elastic body 72 on the side of the waist opening 12 indicated by the long distance 7C. The range sandwiched between the two ends, ie, the range obtained by subtracting the distance 7C from the distance 7B, is defined as the range in the height direction Y of the overlapping portion 4. As shown in FIG.
In the embodiment shown in FIG. 7, the various distances described above are in the relationships of 7A<7B, 7C<7D, and 7A>7D. In this case, the leg opening 13 side end of the overlapping position is identified as the leg opening 13 side end of the inner layer elastic body 72 indicated by the short distance 7A. The end of the overlapping position on the waist opening 12 side is specified as the end of the outer layer elastic body 71 on the waist opening 12 side indicated by the long distance 7D. The range sandwiched between the two ends, ie, the range obtained by subtracting the distance 7D from the distance 7A, is defined as the range in the height direction Y of the overlapping portion 4. As shown in FIG.
In the embodiment shown in FIG. 8, the various distances described above are in the relationships of 7A>7B, 7C<7D, and 7B>7D. In this case, the leg opening 13 side end of the overlapping position is identified as the leg opening 13 side end of the outer layer elastic body 71 indicated by the short distance 7B. The end of the overlapping position on the waist opening 12 side is specified as the end of the outer layer elastic body 71 on the waist opening 12 side indicated by the long distance 7D. The range sandwiched between the two ends, ie, the range obtained by subtracting the distance 7D from the distance 7B, is defined as the range in the height direction Y of the overlapping portion 4. As shown in FIG.
15, which will be described later, when the inner layer elastic body 72 at least partially intersects with the extending direction of the outer layer elastic body 71 and extends downward toward the crotch part 10C. , in the waist circumference direction X, define an overlapping portion 4 by the method described above.
In addition, when an elastic sheet is used, the leg opening 13 side end and the waist opening 12 side end of the elastic sheet are adjusted in the length direction Y of the overlapping portion 4 based on the above method. Confirm the range. Furthermore, when the elastic sheet is used together with the above elastic body, the range of the overlapped portion 4 in the length direction Y is determined based on the above method by combining both.

The contraction rate of the inner layer elastic body 72 in the waist circumference direction X is smaller than the contraction rate of the outer layer elastic body 71 in the waist circumference direction X. That is, the overlapping portion 4 of the region 3 has a stronger contractile force on the non-skin side than on the skin side.

In the overlapping portion 4 of the region 3 configured in this way, the outer layer sheet 61 side is naturally pulled more strongly than the inner layer sheet 63 side from the state shown in FIG. 11(A) as shown in FIG. 11(B). and bends easily. That is, the contractile force (arrow V1-V1) of the outer layer elastic body 71 is greater than the contractile force (V2-V2) of the inner layer elastic body 72, and the front and back of the middle layer sheet 62, that is, the non-skin side surface and the skin side surface. Differential shrinkage occurs at As a result, in the dorsal exterior body 22, the overlapped portion 4 is so-called curled in the vicinity of the left and right side seal portions 11 so as to warp rearward (dorsal side) (arrow J). As a result, the frilled folds 81 connected to the overlapped portion 4 tend to separate from the leg openings 13 of the crotch portion 10C and are easily pulled rearward, resulting in a naturally curled outward state.
As a result, even when the diaper 10 is contracted and the leg openings 13 are contracted, the position of the leg openings 13 can be easily confirmed as shown in FIG. Therefore, at the stage of putting on the diaper 10, the leg openings 13 can be quickly checked without being obstructed by the folds 81, and the hands can be easily passed through the leg openings 13. As shown in FIG. As a result, the diaper 10 can be quickly put on by the person to be worn, and the load of the wearing work can be reduced. In addition, the mental burden associated with the wearing work on both the wearer and the wearer is greatly reduced.
In addition, the arrangement position of the overlapping portion 4 is not limited to the vicinity of the side seal portion 11 in the waist circumference direction X of the region 3 . The overlapping portion 4 may be, for example, closer to the center than the vicinity of the side seal portion 11 in the waist circumference direction X, or may be present in the entire region 3 as long as the region 3 preferably exhibits the above-described shrinkage difference.

From the viewpoint of better manifesting the above effects, the difference (R1-R2 ) is preferably 0.2 or more, more preferably 1.0 or more, and still more preferably 1.4 or more.
In addition, the difference (R1-R2) is determined from the viewpoint of maintaining the appearance by suppressing excessive warping toward the rear side (dorsal side) of the overlapping portion 4 and the fold portion 81, for example, curving outward. 5 or less is preferable, 3.0 or less is more preferable, and 2.5 or less is still more preferable.

(Measuring method of shrinkage ratio)
(1) With the side seal portion of the absorbent article to be measured broken and stretched to the maximum, the elastic body in that state is drawn with a permanent marker at a constant interval L1 in the waist circumference direction X of the elastic body. and make two marks. If the elastic material is plasticized or cut by the components contained in the oil-based pen, two marks are made using a water-based pen or a chalk pen instead of the oil-based pen. The elastic is then cut out between the two marks respectively. The interval L1 can be appropriately set according to the size of the article, and can be set to 100 mm, for example. When the elastic body has an extending direction that intersects the waist circumference direction X as in the embodiment shown in FIG. 15 described later, the interval L1 may be specified and marked by tracing with an OHP or the like.
In addition, in the waist circumference direction X of the overlapping portion 4, if there is a portion where the elastic body overlaps with the absorbent body 16 so that the contractile force is not expressed by cutting the elastic body, the above interval L1 may be such a portion. Mark as not including the region.
(2) Shrinkage ratio of the elastic body itself Bonding between layers (middle layer sheet 62 - outer layer sheet 61, middle layer sheet 62 - inner layer sheet 63) is removed. If the joint is made by fusion or pressure bonding, each elastic body is removed so as not to be cut. When the bonding is made by a hot-melt type adhesive or the like, only each elastic body is removed while being immersed in a 90% or more ethanol solution. The length L2 of each cut elastic body in a non-stretched state (a state in which no external force for stretching is applied) is measured. This measurement is performed three times for each elastic body, and the shrinkage ratio is obtained from the arithmetic mean value of the values calculated by the formula represented by "L1/L2".
When a stretchable sheet is used, the length L2 of each cut out stretchable sheet in a non-stretched state is measured, and the shrinkage ratio is obtained in the same manner as described above.
(3) Shrinkage ratio in the waist circumference direction X (3-1) When each elastic body is arranged in parallel with the waist circumference direction X, the shrinkage ratio measured in the above (1) is the shrinkage ratio in the waist circumference direction X. and The same applies to stretch sheets.
(3-2) If each elastic body is not parallel to the waist circumference direction X, the shrinkage ratio measured in (1) above shall be along the extension direction of each elastic body, and the waist circumference direction X and the body length direction Y After disassembling, the shrinkage ratio in the waist circumference direction X is calculated.
For example, when the inner layer elastic body 72 extends as shown in FIGS. 9A, 9B and 10, the shrinkage ratio in the waist circumference direction X is calculated as follows. 9A and 9B and FIG. 10 described later, the inner layer elastic body 72 is shown as having an extending direction intersecting with the waist circumference direction X as in the embodiment shown in FIG. 15 described later. ing. However, it is not limited to this, and the shrinkage ratio in the waist circumference direction X can be measured by the same method even when the elastic members other than the inner layer elastic body 72 are not parallel to the waist circumference direction X.
(i) As shown in FIGS. 9A and 9B, when the end portion of the inner layer elastic body 72 on the side seal portion 11 side is in the overlapping portion 4, various intersections 72A, 72B and 72C related to the inner layer elastic body 72 is identified as follows: 72 A of intersections are intersections with the edge part of the inner side of the diaper of the inner layer elastic body 72 of the side seal part 11. As shown in FIG. The intersection point 72B is a point where the inner layer elastic body 72 extends from the intersection point 72A and first intersects with the edge of the overlapping portion 4 (the edge on the side of the waist opening 12 or the edge on the side of the leg opening 13). 9(B), the inner layer elastic body 72 extends in a meandering manner (for example, meandering along a trajectory such as a sin curve) from the intersection point 72A and overlaps the overlapping portion 4. 72B at the first crossing point. The intersection point 72C is a point where the intersection point 72B is moved parallel to the waist circumference direction X and intersects with the edge of the side seal portion 11 on the inner side of the diaper.
Based on the following formula (I) from the linear distance 72AB between the intersections 72A-72B and the linear distance 72CB between the intersections 72C-72B, and the shrinkage ratio (M) of the inner layer elastic body 72 itself measured in (1) above, A shrinkage ratio in the waist circumference direction X is calculated.
Shrinkage ratio in waist circumference direction X=M×(72CB/72AB) (I)
(ii) As shown in FIG. 10, when the elastic body traverses the overlapping portion 4, various intersections 72D, 72E and 72F related to the inner layer elastic body 72 are specified as follows. The intersection point 72D is a point where the inner layer elastic body 72 starts from the side seal portion 11 and first intersects with the edge of the overlapping portion (edge on the side of the waist opening 12 or edge on the side of the leg opening 13). The “first intersecting point” means that the inner layer elastic body 72 extends from the intersection 72D in a meandering manner (for example, meandering along a trajectory such as a sine curve) to the edge of the overlapping portion 4 and a plurality of points. means that the first crossing point is the crossing point 72D when crossing at the point of . The intersection point 72E is the second point where the inner layer elastic body 72 intersects the edge of the overlapping portion 4 (the edge on the side of the waist opening 12 or the edge on the side of the leg opening 13). The intersection point 72F is a point where a trajectory obtained by moving the intersection point 72E parallel to the side seal portion 11 along the waist circumference direction X and a trajectory obtained by moving the intersection point 72D along the length direction Y across the overlapping portion 4 intersect. and
Based on the following formula (II) from the linear distance 72DE between the intersections 72D-72E and the linear distance 72FE between the intersections 72F-72E, and the shrinkage ratio (M) of the inner layer elastic body 72 itself measured in (1) above, A shrinkage ratio in the waist circumference direction X is calculated.
Shrinkage ratio in waist circumference direction X=M×(72FE/72DE) (II)

In the laminated structure of the overlapping portion 4 described above, the structure of the outer layer portion may be replaced by a combination of the outer layer sheet 61 and the outer layer elastic body 71, and may be a stretchable outer layer sheet forming the outer surface on the non-skin side. In this case, the aforementioned non-skin-side elastic region includes the stretchable outer layer sheet. Similarly, instead of the combination of the inner layer sheet 63 and the inner layer elastic body 72, the inner layer portion may be configured as a stretchable inner layer sheet forming the inner surface on the skin side. In this case, the aforementioned skin-side elastic region includes the stretchable inner layer sheet.
In this case, the elasticity in the skin-side elastic region and the non-skin-side elastic region of the back exterior body 22 may be a combination of the stretchable outer layer sheet and the stretchable inner layer sheet. It may be a combination with the body 72, or a combination of the outer layer elastic body 71 and the stretchable inner layer sheet.

In the present embodiment, the overlapping portion 4 of the back portion 10R and the fold portion 81 of the crotch portion 10C are formed continuously by the sheet structure of a portion of the back exterior body 22. As shown in FIG. The configuration is not limited to this configuration, and a configuration in which the overlapping portion 4 and the folds 81 are made of separate members and joined together may be used. However, from the viewpoint of more effectively producing the outward warping action, it is preferable to form a continuous sheet structure. In addition, the folds 81 preferably have a smaller contraction ratio than the elasticity of the non-skin side of the overlapped portion 4 from the viewpoint of more effectively producing the outward warping effect.
For example, as shown in FIG. 4, the folds 81 preferably consist of extension portions of the intermediate layer sheet 62, the inner layer sheet 63, and the inner layer elastic body 72. As shown in FIG. Further, the folds 81 may consist of the extending portions of the intermediate layer sheet 62 and the inner layer sheet 63, or may consist of the extending portion of the intermediate layer sheet 62 only. In particular, when the inner layer portion is composed of the stretchable inner layer sheet described above instead of the inner layer sheet 63 and the inner layer elastic body 72 , the folds 81 are preferably formed from the extending portions of the intermediate layer sheet 62 .
It is preferable that the crotch-side extension 8 including the folds 81 also have the same structure as described above.

In this embodiment, the back exterior body 22 has a waist portion 221 above the overlapping portion 4 and a waist portion 222 above the waist portion 221 . As shown in FIG. 4, the waist part 221 and the waist part 222 preferably have a laminated structure of the outer layer sheet 61, the middle layer sheet 62, and the elastic body.
In the waist part 221 , a plurality of stretchable waist elastic bodies 73 constituting part of the outer layer elastic body 71 described above are arranged along the outer elastic body 71 of the overlapping part 4 . That is, the waist elastic body 73 extends in the waist circumference direction X, is interposed between the outer layer sheet 61 and the middle layer sheet 62, and is joined and fixed in a stretched state.
In the waist portion 222 , a plurality of stretchable waist elastics 74 are arranged along the waist elastics 73 . In the waist portion 222 , the outer layer sheet 61 and the middle layer sheet 62 are folded toward the skin side at the waist opening 12 to form the folded portion 23 . The waist-surrounding elastic body 74 extends in the waist-surrounding direction X, and is interposed between the opposing inner layer sheets 63, 63 in the region where the folded-back portion 23 of the waist-surrounding portion 222 is arranged, and is joined in a stretched state. Fixed. Furthermore, the edges of the middle layer sheet 62 forming the folded portion 23 sandwich the upper edge of the absorbent main body 1 to cover the longitudinal direction Y edge of the absorbent main body 1 .
On the other hand, it is preferable that the ventral exterior body 21 also has a laminated structure similar to that of the dorsal exterior body 22 except for the overlapping portion 4, using the outer layer sheet 61, the middle layer sheet 62, and the inner layer sheet 63.
As a result, the diaper 10 can obtain a good fit around the wearer's waist and hips due to the expansion and contraction of the dorsal exterior body 22 and the ventral exterior body 21 . In order to obtain a similar fit, instead of the configuration of the outer layer sheet 61, the waist elastic member 73 and the waist elastic member 74, the stretchable outer layer sheet described above may be used.

In the diaper 10 of the present embodiment, it is preferable that the lengths of adhesion of the outer layer elastic bodies 71 and the inner layer elastic bodies 72 to the intermediate layer sheet 62 in the overlapping portion 4 are as follows.
That is, in the overlapping portion 4, the adhesion length (H1) between the outer elastic body 71 and the middle layer sheet 62 in the waist circumference direction X is the adhesion length (H2 ). This makes it easier for the contractile force of the outer layer elastic body 71 to be more strongly transmitted to the middle layer sheet 62 and the like, and the difference in shrinkage between the front and back of the middle layer sheet 62, that is, the non-skin side surface and the skin side surface, occurs more naturally. It becomes easy to curl to the back side. As a result, the fold 81 is more clearly rolled up around the leg opening 13, and the leg opening 13 can be recognized more quickly, making it easier to pass the hand.
From the above point of view, the difference in adhesion length (H1-H2) is preferably 0.10 mm/mm or more, more preferably 0.65 mm/mm or more, and 0 as the difference in adhesion length per 1 mm of elastic body. 0.75 mm/mm or more is more preferable.
In addition, the difference in adhesion length (H1-H2) is preferably 0.95 mm/mm or less, and 0 0.90 mm/mm or less is more preferable, and 0.85 mm/mm or less is even more preferable.

(Method for measuring adhesive length)
(1) Measure a predetermined length of the elastic body arranged in the overlapping portion 4 in a non-stretched state, and mark both ends thereof. The predetermined length can be appropriately set according to the size of the article, and can be set to 100 mm, for example.
(2) Measure the length along the length of the elastic body of the adhesive portion existing between the marks as follows.
When there is a continuous adhesive portion, the length of the elastic body between the marks is the length of the adhesive.
When the adhesive exists intermittently, the length of the adhesive is defined as the total length of the portions where the adhesive exists along the length direction of the elastic body. For example, in the case of spiral coating of hot-melt adhesive, the width of one spiral is measured with a microscope at five locations, and the average value is taken as the width of the spiral, and the number of spiral lines overlapping the elastic body The value multiplied by is the adhesion length.
(3) The value obtained by dividing the length of the adhesive measured in (2) above by the predetermined length measured in (1) above is defined as the adhesive length per 1 mm of the elastic body.
If it is not possible to visually determine where the adhesive is applied, spray a colored toner such as black (for example, Brother Industries, Ltd., product name "Refill toner powder bottle for laser printer 560971") on the surface of the elastic body. to color the adhesive adhering to the surface of the elastic body. After that, the excess toner is removed by blowing air or using a vacuum cleaner so that the toner is visible only on the adhesive portion, and then the above measurement is performed.

From the same point of view as the configuration of the bonding length, in the overlapping portion 4, the shrinkage ratio (R1) of the outer layer elastic body 71 in the waist circumference direction X relative to the shrinkage ratio (R2) of the inner layer elastic body 72 in the waist circumference direction X The ratio (R1/R2) is the adhesion length (H1) between the outer layer elastic body 71 and the middle layer sheet 62 in the waist circumference direction X, and the adhesion length (H2) between the inner layer elastic body 72 and the middle layer sheet 62 in the waist circumference direction X. ) is preferably greater than the ratio (H1/H2).
Specifically, the difference between the value of the ratio (R1/R2) and the value of the ratio (H1/H2) is preferably 0.5 or more, more preferably 1.0 or more, and further 1.5 or more. preferable.
The difference between the ratio (R1/R2) and the ratio (H1/H2) is preferably 3.0 or less, more preferably 2.5 or less, and even more preferably 2.0 or less.

Furthermore, it is preferable that the outer layer elastic body 71 and the middle layer sheet 62 are adhered continuously in the waist circumference direction X in the overlapping portion 4 . Moreover, in the overlapping portion 4, the inner layer elastic body 72 and the middle layer sheet 62 are preferably bonded by an adhesive layer arranged in a spiral pattern.
With such a configuration, the contractile force of the outer layer elastic body 71 is more easily transmitted to the middle layer sheet 62, whereas the intermittent adhesion of the inner layer elastic body 72 suppresses the propagation of the contractile force to the middle layer sheet 62. . As a result, the above-mentioned difference in shrinkage tends to occur more strongly.

Further, the difference (R1-R2) between the shrinkage ratio (R1) of the outer layer elastic body 71 in the waist circumference direction X and the shrinkage ratio (R2) of the inner layer elastic body 72 in the waist circumference direction X is the middle layer sheet of the outer layer elastic body 71 The difference (H1-H2) between the adhesion length (H1) of the inner layer elastic body 72 and the middle layer sheet 62 in the waist circumference direction X and the adhesion length (H2) of the inner layer elastic body 72 to the middle layer sheet 62 in the waist circumference direction X is preferably larger than the difference (H1-H2).
By adopting such a configuration, it is possible to cause the middle layer sheet 62 to curl due to the difference in contractile force between the two elastic bodies 71 and 72 without waste.
From the above viewpoint, the difference between the shrinkage ratio difference (R1-R2) and the adhesion length difference (H1-H2) is preferably 0.10 or more, more preferably 0.30 or more. , is more preferably 0.45 or more.
Further, the difference between the shrinkage ratio difference (R1-R2) and the bond length difference (H1-H2) is the adhesiveness of the inner layer elastic body 72 and the shrinkage force of both elastic bodies 71 and 72. From the viewpoint of ensuring both ease of transmission of the difference to the intermediate sheet, it is preferably 3.50 or less, more preferably 2.00 or less, and even more preferably 1.50 or less.

Furthermore, in the edge region of the side seal portion 11, the ratio (S2) of the length in the length direction Y of the region where the inner layer elastic body 72 exists to the length in the length direction Y of the side seal portion 11 is It is preferably shorter than the ratio (S1) of the length of the region in which the outer layer elastic body 71 exists in the body length direction Y to the length of the body length direction Y. The “edge region of the side seal portion 11 ” is defined as a region 10 mm from the inner edge of the side seal portion 11 . In addition, the outer layer elastic body 71 referred to here includes the waist elastic body 73 described above.
With such a configuration, the contraction range of the inner layer elastic body 72 is reduced, and the contraction in the overlapping portion 4 mainly occurs in the outer layer elastic body 71 . As a result, curling is likely to occur in a selective range only on the buttocks side behind the crotch portion 10C, suppressing excessive collapse of the shape of the diaper 10, improving the visibility of the leg openings 13, and improving the visibility of the diaper 10. Ease of handling can be further improved.
From the above viewpoint, the ratio (S1) of the length in the length direction Y of the region where the outer layer elastic body 71 exists to the length in the length direction Y of the side seal portion 11 and the length of the side seal portion 11 in the length direction Y The difference (S1-S2) between the length ratio (S2) in the length direction Y of the region where the inner layer elastic body 72 exists is preferably 0.05 mm/mm or more, more preferably 0.10 mm/mm or more, and 0 0.15 mm/mm or more is more preferred.
The difference (S1-S2) is preferably 1.00 mm/mm or less, more preferably 0.70 mm/mm or less, and even more preferably 0.55 mm/mm or less, from the viewpoint of producing visible curl.

In addition, as shown in FIG. 4, in the region closer to the waist opening 12 than the overlapping portion 4, a stretchable waist elastic body 73 is arranged along the waist circumference direction X. and the middle layer sheet 62 and are joined and fixed in a stretched state. The shrinkage ratio (R3) of the waist elastic body 73 in the waist circumference direction X is larger than the shrinkage ratio (R2) of the inner layer elastic body 72 in the waist circumference direction X in the overlapping portion 4, and the waist of the outer layer elastic body 71 in the overlapping portion 4 is larger. It is preferably smaller than the shrinkage ratio (R1) in the circumferential direction X. The waist elastic body 73 is in the same layer as the outer layer elastic body 71 and can be said to constitute a part of this outer layer elastic body 71 . When distinguishing between the waist elastic body 73 and the outer layer elastic body 71 , the outer layer elastic body 71 means the one in the overlapping portion 4 .
With such a configuration, on the non-skin side of the middle layer sheet 62 , a difference in contraction also occurs in the waist portion 221 that continues to the upper portion of the overlapping portion 4 , thereby assisting the curling of the overlapping portion 4 . This further improves the visibility of the leg openings 13 in the crotch portion 10C.
From the above viewpoint, the difference (R3-R2) between the shrinkage ratio (R3) of the waist elastic body 73 and the shrinkage ratio (R2) of the inner layer elastic body 72 is preferably 0.1 or more, more preferably 0.40 or more. Preferably, 0.90 or more is more preferable. In addition, the difference (R3-R2) is determined from the viewpoint of maintaining the appearance by suppressing excessive warping toward the rear side (dorsal side) of the overlapping portion 4 and the fold portion 81, for example, curving outward. 60 or less is preferable, 2.10 or less is more preferable, and 1.70 or less is still more preferable.
In addition, the difference between the shrinkage ratio (R1) of the outer layer elastic body 71 and the waist elastic body 73 (R3) and the difference (R1-R3) in the overlapping portion 4 is preferably 0.10 or more from the above viewpoint. 0.50 or more is more preferable, and 1.00 or more is still more preferable. In addition, the difference (R1-R3) suppresses distortion at the interface between the outer layer elastic body 71 in the overlapped portion 4 and the waist elastic body 73 on the side of the waist opening 12 due to the difference in the shrinkage ratio, thereby improving the appearance. is preferably 2.50 or less, more preferably 2.00 or less, and even more preferably 1.00 or less.

Furthermore, as described above, it is preferable that the inner layer elastic body 72 is a filamentous body such as thread rubber, and that the basis weight (M2) of the middle layer sheet 62 is lower than the basis weight (M1) of the inner layer sheet 63 . Furthermore, the intermediate layer sheet 62 preferably has a lower nonwoven fabric bulk softness than the inner layer sheet 63 .
With such a configuration, the nonwoven fabric is imparted with a difference in rigidity, so that the warping to the rear side via the intermediate layer sheet 62 is likely to occur more effectively.
From the above viewpoint, the difference (M1−M2) between the basis weight (M1) of the inner layer sheet 63 and the basis weight (M2) of the middle layer sheet 62 is preferably 2 g/m ² or more, more preferably 5 g/m ² or more. , 8 g/m ² or more is more preferable. In addition, the difference (M1-M2) is preferably 35 g/m ² or less, more preferably 20 g/m ² or less, and 15 g/m ² or less from the viewpoint of preventing wrinkles caused by laminating nonwoven fabrics with different rigidity. is more preferred.
Furthermore, from the above viewpoint, the difference (B1-B2) between the nonwoven fabric bulk softness (B1) of the inner layer sheet 63 and the nonwoven fabric bulk softness (B2) of the intermediate layer sheet 62 is preferably 0.5 cN or more, and 1.0 cN. 1.5 cN or more is more preferable. In addition, the difference (B1-B2) is preferably 4.0 cN or less, more preferably 3.0 cN or less, and even more preferably 2.5 cN or less, from the viewpoint of preventing the occurrence of wrinkles caused by laminating nonwoven fabrics with different rigidity. .
It is preferable that the relationship between the basis weight and the nonwoven fabric bulk softness between the middle layer sheet 62 and the inner layer sheet 63 is satisfied at least in the overlapping portion 4 .

(Method for measuring bulk softness of nonwoven fabric)
Under an environment of 22° C. and 65% RH, each of the non-woven fabrics of the middle layer sheet 62 and the inner layer sheet 63 is cut to 150 mm in the waist circumference direction X and 30 mm in the length direction Y, and this is used as a measurement piece. This measurement piece is stapled at two upper and lower ends so as to form a ring with a diameter of 45 mm. At this time, the core of the stapler should be long in the CD direction. Next, using a tensile tester (for example, Tensilon tensile tester “RTA-100” trade name manufactured by Orientec Co., Ltd.), the ring-shaped measurement piece is stood on a sample table in a cylindrical shape, and the table is almost from above. The maximum load is measured when parallel flat plates are compressed at a compression speed of 10 mm/min. This measurement is performed on arbitrary three points cut out from each of the intermediate layer sheet 62 and the inner layer sheet 63, and the average value thereof is taken as the bulk softness.
When cutting out the measurement piece from the overlapping portion 4, the range in the length direction Y is specified based on (Method for defining the range in the length direction Y of the overlapping portion 4).

Moreover, it is preferable to form the outer layer elastic body 71 and the inner layer elastic body 72 in the overlapping portion 4 as follows.
That is, it is preferable that the number of the inner layer elastic bodies 72 in the overlapping portion 4 per length direction is smaller than that of the outer layer elastic bodies 71 . In the overlapping portion 4 , the inner layer elastic body 72 is preferably a filamentous body thinner than the outer layer elastic body 71 . The arrangement pitch of the inner layer elastic bodies 72 in the overlapping portion 4 is preferably larger than the arrangement pitch of the outer layer elastic bodies 71 .
By adopting such a configuration, it becomes easier to produce a difference in contractile force between the outer layer elastic body 71 and the inner layer elastic body 72 in the overlapping portion 4, and the above-described outward warping action tends to occur more effectively.
From the above viewpoint, in the overlapping portion 4, the difference (E1-E2) between the number of outer layer elastic bodies 71 per length direction (E1) and the number of inner layer elastic bodies 72 per length direction (E2) is 1 or more. is preferred, two or more are more preferred, and three or more are even more preferred. Further, in the overlapping portion 4, the difference (E1-E2) is preferably 15 lines or less, more preferably 12 lines or less, and even more preferably 10 lines or less.
In addition, from the above viewpoint, the difference (F1-F2) between the thickness (F1) of the outer layer elastic body 71 and the thickness (F2) of the inner layer elastic body 72 in the overlapping portion 4 is preferably 130 dtex or more, more preferably 290 dtex. The above is more preferable. Moreover, in the overlapping portion 4, the difference (F1-F2) is preferably 600 dtex or less from the viewpoint of preventing deterioration of the appearance due to wrinkles caused by a large difference in thickness of the elastic body.
Furthermore, in the overlapping portion 4, the difference (P2-P1) between the arrangement pitch (P2) of the inner layer elastic bodies 72 and the arrangement pitch (P1) of the outer layer elastic bodies 71 is preferably 1.0 mm or more, and is preferably 3.0 mm or more. More preferably, it is 5.0 mm or more. In addition, in the overlapping portion 4, the difference (P2-P1) is preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less from the viewpoint of preventing deterioration of the appearance due to wrinkles caused by a large pitch difference. .

Furthermore, as shown in FIG. 14, the inner layer sheet 63 preferably has a region 65 that extends from the overlapping portion 4 toward the waist opening 12 and does not overlap the inner layer elastic body 72 in the thickness direction.
By arranging such regions 65 , the contractile force of the inner layer elastic bodies 72 can be transmitted to the middle layer sheet 62 via the regions 65 even if the inner layer elastic bodies 72 are not present at the regions 65 . As a result, the waist-surrounding elastic body 73 and the region 65 make it easier for the waist to warp, and the warping of the overlapping portion 4 can be assisted.

Moreover, the arrangement of the outer layer elastic body 71 and the inner layer elastic body 72 in the plane direction can take various forms that can effectively exhibit the action in the overlapping portion 4 described above. Examples include the embodiment shown in FIGS. 13 and 14, the embodiment shown in FIG. 15, and the like.
These will be described below.

In the embodiment shown in FIGS. 13 and 14, a plurality of inner layer elastic bodies 72 are arranged from the overlapping portion 4 to a region extending from the overlapping portion 4 toward the crotch portion 10C. The region extending toward the crotch portion 10C is the crotch-side extension portion 8 described above.
The inner layer elastic body 72 is interposed between the inner layer sheet 63 and the middle layer sheet 62 at the overlapping portion 4 and the crotch side extension portion 8 and is joined and fixed in a stretched state. In a state of being joined and fixed, the inner layer elastic bodies 72 extend along the waist circumference direction X, and a plurality of them are arranged parallel to each other. In the overlapping portion 4, the inner layer elastic body 72 extends in the waist circumference direction X while both ends thereof are joined and fixed to the left and right side seal portions 11, 11, and joined and fixed between the sheets. The inner layer elastic bodies 72 arranged in parallel are arranged in the length direction Y at equal intervals. In the crotch-side extension portion 8 that extends toward the crotch portion 10C, the inner layer elastic body 72 does not overlap the outer layer elastic body 71 in the thickness direction.
On the other hand, a plurality of outer layer elastic bodies 71 extend along the waist circumference direction X so as to connect the left and right side seal portions 11, 11 in the same manner as described above. The plurality of outer layer elastic bodies 71 are arranged parallel to each other in the length direction Y while being spaced apart from each other at equal intervals.
By adopting such a configuration, the curl to the rear side in the overlapping portion 4 can be more easily propagated to the crotch side extension portion 8 where the inner layer elastic body 72 exists, and the fold portion 81 around the leg opening 13 can be easily spread. is better and easier to roll outward naturally.

In the embodiment shown in FIG. 15, the outer layer elastic bodies 71 extend along the waist circumference direction X and are arranged parallel to each other as described above.
On the other hand, the inner layer elastic body 72 has an extending direction that intersects with the extending direction of the outer layer elastic body 71 at least in part and descends toward the crotch part 10C side, and a plurality of the inner layer elastic bodies 72 are arranged parallel to each other. It is
In such an arrangement, in a plan view of the overlapping portion 4, the intersection of the outer layer elastic body 71 and the inner layer elastic body 72 is located at the portion where the inner layer elastic body 72 extends from the side seal portion 11 and begins to descend toward the crotch portion 10C. There are 75. This crossing portion 75 forms the overlapping portion 4 and is formed in the vicinity of the side seal portion 11 . At the intersecting portion 75, the stretching direction of the skin side is angled with respect to the stretching direction of the non-skin side (the waist circumference direction X) with the intermediate layer sheet 62 interposed therebetween. The outer layer elastic body 71 and the inner layer elastic body 72 are arranged in the vicinity of the side seal portion 11, for example, as shown in the enlarged schematic diagram of FIG.

As shown in FIG. 16, at this crossing portion 75, in the extending direction of the outer layer elastic body 71, that is, in the waist circumference direction X, the point (intersection point) where the outer layer elastic body 71 intersects with the inner layer elastic body 72 is the waist opening. More on the leg opening 13 side than on the 12 side. In the example shown in FIG. 16 , there is one intersection point 77 with the inner layer elastic body 72 in the outer layer elastic body 71 closest to the waist opening 12 side of the crossing portion 75 (overlapping portion 4 ). On the other hand, the outer layer elastic body 71 closest to the leg opening 13 side of the intersection 75 (overlapping portion 4) has three intersections 77 with the inner layer elastic body 72, and the leg opening is closer to the waist opening 12 side than the waist opening 12 side. The number of intersections 77 on the part 13 side is increased.
A point where the outer layer elastic body 71 intersects with the inner layer elastic body 72 is a bending point of the sheet stack including the middle layer sheet 62 in the overlapping portion 4 . At the bending point, the overlapping portion 4 is likely to warp due to the aforementioned difference in contractile force. By arranging more such bending points on the side of the leg opening 13 near the side seal portion 11, the outward curling of the fold portion 81 occurs more effectively around the leg opening 13 of the crotch portion 10C. easier.
Further, in the above configuration, many intersection points 77 are arranged along the extending direction of the outer layer elastic body 71 on the leg opening 13 side. The intersection points 77 tend to approach each other along the extending direction of the outer layer elastic body 71 having relatively strong contractile force. As a result, the middle layer sheet 62 sandwiched between the outer layer elastic body 71 and the inner layer elastic body 72 at the intersection 77 on the side of the leg opening 13 of the overlapping portion 4 extends in the extending direction of the outer layer elastic body 71 having a relatively strong contractile force. Along the , it comes to warp more strongly to the rear side. In addition, at the intersection point 77, the inner layer elastic body 72 has a contractile force vector that is different from that of the outer layer elastic body 71 toward the crotch part 10C side. The inner layer elastic body 72 has a relatively weak contractile force, and can more effectively propagate the strong sheet curling contractive force acting in the extending direction of the outer layer elastic body 71 to the folds 81 .

15, the outer layer elastic body 71 and the middle layer sheet 62 are connected in the waist circumference direction X by an adhesive layer 91 arranged along the outer layer elastic body 71, as shown in FIG. It is preferably adhered to the In addition, the inner layer elastic body 72 and the middle layer sheet 62 are preferably intermittently bonded by a plurality of adhesive layers 92 extending in the length direction Y and intermittently arranged in the waist circumference direction X.
In the bonding mode as described above, in the overlapping portion 4, the crossing angle between the outer layer elastic body 71 and the inner layer elastic body 72 is such that the adhesive layer 91 bonding the outer layer elastic body 71 and the middle layer sheet 62 and the inner layer elastic body 72 and It is preferably smaller than the angle formed by the adhesive layer 92 that adheres the middle layer sheet 62 .
With such a configuration, the contractile force difference between the outer layer elastic body 71 and the inner layer elastic body 72 can be efficiently transmitted. This makes it easier for the overlapped portion 4 and the folds 81 to warp backward, that is, curl more strongly and naturally.
From the above point of view, in the overlapping portion 4, the difference (θ1- θ2) is preferably 10 degrees or more, more preferably 20 degrees or more, and still more preferably 30 degrees or more.
In addition, the difference (θ1-θ2) is preferably 80 degrees or less, more preferably 70 degrees or less, and even more preferably 60 degrees or less, from the viewpoint of preventing wrinkles caused by an increase in the angle difference (θ1-θ2). preferable.

Adhesive layer 91 and adhesive layer 92 can be formed by a method commonly used in this type of article. For example, the adhesive layer 91 can be formed by applying an adhesive such as a hot-melt adhesive with a comb gun or the like over the entire length of the thread-like or string-like outer layer elastic body 71 . The adhesive layer 92 can be formed by spirally applying an adhesive such as a hot-melt adhesive in a belt shape having a predetermined width along the length direction Y. As shown in FIG.
In the case where the adhesive layer 92 is spirally formed into a belt shape and has a shape extending in the length direction Y, an error may occur in the extending direction depending on the location due to the coating method. Therefore, when this coating method is used, the aforementioned angle (θ1) is the average value of the values measured for three products.

Furthermore, in the embodiment shown in FIG. 15, the inner layer elastic body 72 overlaps the outer layer elastic body 71 in the thickness direction at the overlapping portion 4, and curves inward in the waist circumference direction X to descend toward the crotch portion 10C. preferably extends as In the crotch portion 10C, the inner layer elastic body 72 preferably extends so as to overlap with the absorbent main body 1, particularly the absorbent body 16, included in the crotch portion 10C in the thickness direction.
More specifically, the inner layer elastic body 72 extends in the waist circumference direction X from the side seal portions 11, 11 to a predetermined range inwardly while being joined and fixed by the left and right side seal portions 11, 11. preferably. From the middle, the inner layer elastic body 72 preferably extends to the area of the crotch portion 10C so as to descend toward the crotch portion 10C, and overlaps the absorber 16 in the thickness direction.
As a result, the action described above is likely to be more effectively manifested, and curling at the folds 81 is more likely to occur more effectively.

In the diaper 10 of this embodiment, as described above, the abdominal exterior body 21 disposed on the abdomen part 10F is joined to the dorsal exterior body 22 at the left and right side edge portions at the side seal portions.
As shown in FIG. 17, the ventral exterior body 21 preferably has the same configuration as the dorsal exterior body 22 except for the overlapping portion 4 . Specifically, the outer layer sheet 61, the middle layer sheet 62, the inner layer sheet 63, the waist elastic member 73, and the waist elastic member 74 are used to form the waist portion 211 and the waist portion 212 of the abdominal exterior body 21. is preferred. In the waist-surrounding portion 212 , the folded portion 23 preferably covers the abdominal end portion of the absorbent body 1 .
In addition, in the portion 213 (hereinafter also simply referred to as the portion 213) of the abdominal exterior body 21 that is joined to the overlapping portion 4 of the dorsal exterior body 22 via the side seal portion 11, the number of elastic bodies is less than the dorsal side. It is preferable that the number is smaller than the number of elastic bodies arranged in the overlapping portion 4 of the portion 10R.
By adopting such a configuration, the portion 213 of the ventral exterior body 21 has a weaker contractile force than the entire overlapping portion 4 of the dorsal exterior body 22, and the portion of the side seal portion 11 also tends to lean toward the rear side. As a result, the warping of the overlapped portion 4 and the curling of the folds 81 via the overlapped portion 4 are likely to occur more effectively.

Furthermore, as shown in FIG. 17, the portion 213 of the ventral exterior body 21 that is joined to the overlapping portion 4 of the dorsal exterior body 22 via the side seal portion 11 is a middle-layer sheet that constitutes the ventral exterior body 21. 62 and inner layer sheet 63 are preferred.
By adopting such a configuration, the portion 213 of the ventral exterior body 21 has lower rigidity than the overlapping portion 4 of the dorsal exterior body 22, and the portion of the side seal portion 11 is more likely to shift to the rear side. As a result, the above-described curled warpage of the overlapped portion 4 and the curling of the folds 81 through the overlapped portion 4 are likely to occur more effectively.

In the diaper 10 of the present embodiment, in the overlapping portion 4, the outer layer elastic body 71 is a filamentous body, which is sandwiched and joined between the outer layer sheet 61 and the middle layer sheet 62, and the outer layer sheet 61 is composed of a stretchable sheet. is preferred. Further, the shrinkage ratio in the waist circumference direction X of the outer layer sheet 61 made of a stretchable sheet is preferably larger than the shrinkage ratio in the waist circumference direction X of the inner layer elastic body 72 .
In this way, the stretchable sheet having a larger contraction ratio than the inner elastic body 72 is used as the outer layer sheet 61, and arranging it on the outer layer elastic body 71 side of the overlapped portion 4 reinforces the appearance of curling warping of the overlapped portion 4 described above. It will happen.

Moreover, it is preferable that the outer layer elastic body 71 and the middle layer sheet 62 are not disposed in the overlapping portion 4, and the outer layer sheet 61 is made of a stretchable sheet. The outer layer sheet 61 is joined to the inner layer sheet 63 intermittently, and the inner layer elastic body 72 is joined between the joints of the outer layer sheet 61 and the inner layer sheet 63 with a comb gun type adhesive layer. preferably. This makes it possible to form an adhesive layer in which the adhesive is applied only to the portion where the thread-like or string-like inner layer elastic body 72 exists. With such an adhesive layer, it is possible to reduce the area of the joint between the outer layer sheet 61 and the inner layer sheet 63, which are elastic sheets, at the position where the inner layer elastic body 72 is arranged.
In the above configuration, the joint between the inner layer sheet 63 and the inner elastic body 72 and the joint between the outer layer sheet 61 and the inner layer sheet 63 made of a stretchable sheet are unlikely to overlap each other, and each shrinkage force acts on the inner layer separately. Therefore, the contractile force can be transmitted to the outer layer sheet without interference between the contractile forces.

Furthermore, in each of the above-described embodiments, the example in which the elastic body is configured by filamentous bodies such as thread rubber has been described, but instead of these filamentous bodies, a stretchable sheet may be used.
When configured with this stretchable sheet, the outer layer sheet 61 and the inner layer sheet 63 can be configured with this stretchable sheet. In other words, the outer layer sheet 61 itself and the inner layer sheet 63 themselves are made of extensible materials, each of which is given elasticity for contraction in the direction around the waist, and can be joined to the middle layer sheet 62.

Each member constituting the pants-type diaper 10 can be formed using various materials used in this type of article.
For example, the materials of the outer layer sheet 61, the intermediate layer sheet 62, and the inner layer sheet 63, which constitute the exterior body 2, are made by various manufacturing methods such as air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric. Nonwoven fabrics, woven fabrics, knitted fabrics, resin films and the like can be mentioned, and sheet materials and the like obtained by laminating and integrating these can also be used. Various materials can be used for the material. For example, synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resins can be used.
In particular, the inner layer sheet 63 is preferably made of a nonwoven fabric from the viewpoint of improving breathability and texture, and preferably made of a water-repellent nonwoven fabric from the viewpoint of preventing leakage of excrement.

Usual elastic materials used for wearing articles such as diapers and sanitary napkins can be used as the materials for the various elastic bodies described above. Rubber, natural rubber, EVA, stretchable polyolefin, polyurethane, etc., can be mentioned, and the shape thereof is a thread-like or string-like (flat rubber, etc.) having a rectangular, square, circular, polygonal cross section, etc., or multifilament. A filamentous material of the type can be used.
In addition, as the elastic sheet, two sheets such as those described in paragraphs [0012] to [0085] of JP-A-2008-179128 and [0013] to [0051] of JP-A-2007-22066 Sheets obtained by sandwiching elastic filaments between fiber sheets and performing tooth groove stretching processing, elastic films as described in paragraph [0079] of JP-A-2019-103889, polyurethane films, and the like.

In addition, the absorbent main body 1 can be made of materials that are commonly used in diapers of this type without any particular limitations.

The pants-type wearing article of the present invention is not limited to the embodiment of the pants-type diaper 10 as described above, but is a concept including various items having a pants-type structure.
For example, the exterior body 2 is not limited to the form in which the ventral exterior body 21 and the dorsal exterior body 22 are separated from each other, and the ventral side portion 10F, the crotch portion 10C, and the dorsal side portion 10R as a whole form an external main body. You may make it
Further, the pants-type wearing article of the present invention may be for infants or adults, and may be in a form other than a diaper. For example, as forms other than diapers, sanitary shorts, shorts-type napkins, disposable shorts, and the like may be used. In addition, the present invention is not limited to the pants-type diaper 10 having an absorbent main body, but may be a diaper cover, underwear, or the like that does not have an absorbent main body.

Regarding the above-described embodiment, the present invention further discloses the following pants-type wearing article.

<1>
A pants-type wearing article having an abdominal portion arranged on the abdomen side of the wearer, a crotch portion arranged on the crotch side, and a back portion arranged on the back side, and having a waist circumference direction and a body length direction. hand,
The pants-type wearing article includes a waist opening arranged above the abdominal portion and the dorsal portion in the length direction, and a pair of leg openings arranged on the left and right sides of the crotch portion,
The back outer body forming the outer surface main body of the back part has elasticity necessary for stretching at least in the waist circumference direction on the skin side and the non-skin side of the back outer body in the region on the leg opening side. having a skin-side elastic region and a non-skin-side elastic region,
The back-side exterior body has an elastic overlapping portion in which the skin-side elastic region and the non-skin-side elastic region overlap each other in the thickness direction of the back-side exterior body. The shrinkage ratio of the region in the waist circumference direction is smaller than the shrinkage ratio of the non-skin-side elastic region in the waist circumference direction, and the back exterior body is connected to the overlapping portion outside the leg opening of the crotch portion. A pants-type wearing article having folds.

<2>
The overlapping portion has a laminated structure including an outer layer portion, a middle layer portion, and an inner layer portion arranged in a region on the leg opening side, and the middle layer portion is a middle layer sheet made of a sheet material,
In the overlapping portion, the inner layer portion includes the skin-side elastic region, the outer layer portion includes the non-skin-side elastic region, and the skin-side elastic region and the non-skin-side elastic region are separated by the intermediate layer sheet. The underpants-type wearing article according to <1>, wherein the underpants-type wearing article is positioned so as to overlap with the back exterior body in the thickness direction.

<3>
The outer layer portion has an outer layer sheet made of a sheet material constituting an outer surface on the non-skin side, and an outer layer elastic body interposed between the outer layer sheet and the intermediate layer sheet and extensibly joined and fixed. , the outer layer elastic body is arranged to have an extending direction at least along the waist circumference direction,
The underpants-type wearing article according to <2>, wherein the non-skin-side elastic region includes the outer layer elastic body.
<4>
The outer layer portion is a stretchable outer layer sheet that constitutes the outer surface on the non-skin side,
The underpants-type wearing article according to <2>, wherein the non-skin-side elastic region includes the stretchable outer layer sheet.

<5>
The inner layer portion has an inner layer sheet made of a sheet material constituting an inner surface on the skin side, and an inner layer elastic body interposed between the inner layer sheet and the middle layer sheet and extensibly joined and fixed, the inner layer elastic body is arranged with an extending direction along at least the waist circumference direction,
The underpants-type wearing article according to any one of <2> to <4>, wherein the skin-side elastic region includes the inner layer elastic body.
<6>
The inner layer portion is a stretchable inner layer sheet that constitutes the inner surface on the skin side,
The underpants-type wearing article according to any one of <2> to <4>, wherein the skin-side elastic region includes the stretchable inner layer sheet.

<7>
The outer layer portion has an outer layer sheet made of a sheet material constituting an outer surface on the non-skin side, and an outer layer elastic body interposed between the outer layer sheet and the intermediate layer sheet and extensibly joined and fixed. , the outer layer elastic body is arranged so as to extend in at least the waist circumference direction, and the non-skin-side elastic region includes the outer layer elastic body;
The inner layer portion has an inner layer sheet made of a sheet material constituting an inner surface on the skin side, and an inner layer elastic body interposed between the inner layer sheet and the middle layer sheet and extensibly joined and fixed, The inner layer elastic body is arranged with an extension direction at least in the waist circumference direction, and the skin-side elastic region includes the inner layer elastic body,
the outer layer elastic body and the inner layer elastic body are arranged at positions where they overlap in the thickness direction to constitute the overlapping portion;
The pants-type wearing article according to <2>, wherein the shrinkage ratio of the inner layer elastic body in the waist circumference direction is smaller than the shrinkage ratio of the outer layer elastic body in the waist circumference direction.

<8>
In the above <7>, wherein in the overlapping portion, the length of adhesion between the outer elastic body and the middle layer sheet in the waist circumference direction is longer than the adhesion length between the inner elastic body and the middle layer sheet in the waist circumference direction. The described pants-type wearing article.
<9>
In the overlapping portion, the ratio of the shrinkage ratio of the outer elastic layer in the waist circumference direction to the shrinkage ratio of the inner elastic layer in the waist circumference direction is the adhesion length of the outer elastic layer to the middle layer sheet in the waist circumference direction. The underpants-type wearing article according to <8> above, wherein the ratio of the adhesion length between the inner layer elastic body and the middle layer sheet in the waist circumference direction is greater than the ratio.
<10>
The underpants-type wearing article according to any one of <7> to <9>, wherein the outer layer elastic body and the middle layer sheet are continuously adhered to each other in the waist circumference direction in the overlapping portion.
<11>
The underpants-type wearing article according to any one of <7> to <10>, wherein the inner layer elastic body and the middle layer sheet are adhered by an adhesive layer arranged in a spiral pattern.
<12>
The difference between the shrinkage ratio of the outer layer elastic in the waist circumference direction and the shrinkage ratio of the inner layer elastic in the waist circumference direction is the adhesion length of the outer layer elastic to the middle layer sheet in the waist circumference direction and the inner layer elastic The underpants-type wearing article according to any one of <7> to <11> above, wherein the difference in length between the middle-layer sheet and the middle-layer sheet in the waist circumference direction is greater.

<13>
A side seal portion is arranged to join both side edges of the ventral portion and the dorsal portion. <7> to <12, wherein the ratio of the length in the length direction of the existing region is shorter than the ratio of the length in the length direction of the outer layer elastic body to the length of the side seal portion in the length direction of the length of the body. The underpants-type wearing article according to any one of >.
<14>
In a region closer to the waist opening than the overlapping portion, a stretchable waist elastic body is arranged along the waist circumference direction, and the waist elastic body is interposed between the outer layer sheet and the middle layer sheet and stretched. It is joined and fixed in the state,
The shrinkage ratio of the waist elastic in the waist direction is larger than the shrinkage ratio of the inner layer elastic in the waist direction in the overlapping portion, and is smaller than the contraction ratio of the outer layer elastic in the waist direction in the overlapping portion. The pants-type wearing article according to any one of <7> to <13> above.

<15>
The underpants-type wearing article according to any one of <7> to <14>, wherein the inner layer elastic body is a filamentous body, and the basis weight of the middle layer sheet is lower than the basis weight of the inner layer sheet.
<16>
The underpants-type wearing article according to any one of <7> to <15>, wherein the middle layer sheet has a lower nonwoven fabric bulk softness than the inner layer sheet.
<17>
The underpants-type wearing article according to any one of <7> to <16>, wherein in the overlapping portion, the number of inner layer elastic bodies per body length direction is smaller than that of the outer layer elastic bodies.
<18>
The underpants-type wearing article according to any one of <7> to <17>, wherein in the overlapping portion, the inner layer elastic body is a filamentous body thinner than the outer layer elastic body.
<19>
The underpants-type wearing article according to any one of <7> to <18>, wherein the inner layer elastic bodies are arranged at a larger pitch than the outer layer elastic bodies in the overlapping portion.
<20>
The underpants type wear according to any one of <7> to <19>, wherein the inner layer sheet extends from the overlapping portion toward the waist opening side and has a region that does not overlap with the inner layer elastic body in the thickness direction. Goods.

<21>
A plurality of the inner layer elastic bodies are arranged from the overlapping portion to a region extending from the overlapping portion to the crotch portion side, are interposed between the inner layer sheet and the intermediate layer sheet, and are joined and fixed in a stretched state,
the inner layer elastic body extends along the waist circumference direction, and a plurality of the inner layer elastic bodies are arranged parallel to each other;
The underpants-type wearing article according to any one of <7> to <20>, wherein the inner layer elastic body does not overlap the outer layer elastic body in the thickness direction in the region extending to the crotch portion side.

<22>
the outer layer elastic bodies extend along the waist circumference direction, and a plurality of the outer layer elastic bodies are arranged parallel to each other;
At least a portion of the inner layer elastic body has an extending direction that intersects with the extending direction of the outer layer elastic body and descends toward the crotch portion side, and a plurality of the inner layer elastic bodies are arranged parallel to each other. and
an intersection portion of the outer layer elastic body and the inner layer elastic body is present at a portion where the inner layer elastic body begins to descend toward the crotch portion, and the intersection portion forms the overlapping portion;
In the intersecting portion, the number of points where the outer layer elastic body intersects with the inner layer elastic body in the extending direction of the outer layer elastic body is greater on the leg opening side than on the waist opening side. 7> to <20>, the underpants-type wearing article according to any one of <20>.
<23>
the outer layer elastic body and the middle layer sheet are continuously bonded in the waist circumference direction by an adhesive layer arranged along the outer layer elastic body,
The inner layer elastic body and the middle layer sheet are intermittently bonded by a plurality of adhesive layers extending in the length direction and intermittently arranged in the waist circumference direction,
In the overlapping portion, the intersection angle formed by the outer elastic body and the inner elastic body is such that the adhesive layer bonding the outer elastic body and the intermediate layer sheet and the adhesive layer bonding the inner elastic body and the intermediate layer sheet The underpants-type wearing article according to <22> above, which is smaller than the angle between the two.
<24>
The inner layer elastic body overlaps with the outer layer elastic body in the thickness direction at the overlapping portion, and bends inward in the waist circumference direction to descend to the crotch portion side, and the absorber included in the crotch portion. The pants-type wearing article according to <22> or <23>, which extends so as to overlap in the thickness direction.

<25>
The dorsal exterior body forming the outer surface main body of the dorsal portion and the ventral exterior body forming the outer surface main body of the ventral portion are joined at both left and right side edges by side seal portions,
The number of elastic bodies in the portion of the abdominal exterior body joined to the overlapping portion of the dorsal exterior body via the side seal portion is less than the number of elastic bodies arranged in the overlapping portion. , The pants-type wearing article according to any one of <7> to <24>.
<26>
The dorsal exterior body forming the outer surface main body of the dorsal portion and the ventral exterior body forming the outer surface main body of the ventral portion are joined at both left and right side edges by side seal portions,
The portion of the ventral exterior body that is joined via the overlapping portion of the dorsal exterior body and the side seal portion is composed of a middle layer sheet and an inner layer sheet that constitute the ventral exterior body. The pants-type wearing article according to any one of > to <25>.

<27>
In the overlapping portion, the outer layer elastic body is a filamentous body, and is sandwiched and joined between the outer layer sheet and the middle layer sheet, and the outer layer sheet is made of a stretchable sheet, and the outer layer sheet contracts in the waist circumference direction. The underpants-type wearing article according to any one of <7> to <26> above, wherein the contraction rate of the inner layer elastic body in the direction around the waist is greater than that of the inner layer elastic body.

<28>
In the overlapping portion, the outer layer elastic body and the middle layer sheet are not arranged, the outer layer sheet is made of a stretchable sheet, and is intermittently joined to the inner layer sheet, and the inner layer elastic body is a comb gun type adhesive. The underpants-type wearing article according to any one of <7> to <27>, wherein the outer layer sheet and the inner layer sheet are bonded at a layer between the bonding portions.

1 Absorbent Main Body 2 Exterior Body 21 Abdominal Exterior Body 211 Waist Circumference 212 Waist Periphery 213 Part of Abdominal Exterior Body Joined to Overlapping Part of Back Exterior Body via Side Seal Part 22 Back Exterior Body 221 Waist circumference part 222 Waist circumference part 23 Folding part 3 Area on the leg opening side of the back armor (lower end area of the back armor)
4 overlapping portion 61 outer layer sheet 62 middle layer sheet 63 inner layer sheet 65 area where the inner layer sheet does not overlap the inner layer elastic body 71 outer layer elastic body 72 inner layer elastic body 73 waist circumference elastic body 74 waist circumference elastic body 75 intersection part 77 intersection point 8 crotch side extension Part 81 Folds 91 Adhesive layer arranged along the outer layer elastic body 92 Adhesive layer extending in the length direction and intermittently arranged in the direction around the waist 10 Diaper 10F Abdominal part of diaper 10C Crotch part of diaper 10R Diaper 10D Diaper waist circumference 11 Side seal 12 Waist opening 13 Leg opening 14 Top sheet 15 Back sheet 16 Absorbent body 17 Side sheet 18 Leg gather elastic body Y Length direction of diaper (or absorbent body longitudinal direction)
X Width direction around the waist of the diaper (or width direction of the absorbent main body)

Claims (16)

A pants-type wearing article having an abdominal portion arranged on the abdomen side of the wearer, a crotch portion arranged on the crotch side, and a back portion arranged on the back side, and having a waist circumference direction and a body length direction. hand,
The pants-type wearing article includes a waist opening arranged above the abdominal portion and the dorsal portion in the length direction, and a pair of leg openings arranged on the left and right sides of the crotch portion,
The back outer body forming the outer surface main body of the back part has elasticity necessary for stretching at least in the waist circumference direction on the skin side and the non-skin side of the back outer body in the region on the leg opening side. having a skin-side elastic region and a non-skin-side elastic region,
The back-side exterior body has an elastic overlapping portion in which the skin-side elastic region and the non-skin-side elastic region overlap each other in the thickness direction of the back-side exterior body. The shrinkage ratio of the region in the waist circumference direction is smaller than the shrinkage ratio of the non-skin-side elastic region in the waist circumference direction, and the back exterior body is connected to the overlapping portion outside the leg opening of the crotch portion. A pants-type wearing article having folds. The overlapping portion has a laminated structure including an outer layer portion, a middle layer portion, and an inner layer portion arranged in a region on the leg opening side, and the middle layer portion is a middle layer sheet made of a sheet material,
In the overlapping portion, the inner layer portion includes the skin-side elastic region, the outer layer portion includes the non-skin-side elastic region, and the skin-side elastic region and the non-skin-side elastic region are separated by the intermediate layer sheet. 2. The underpants-type wearing article according to claim 1, wherein the underpants-type wearing article is positioned so as to overlap with the back-side exterior body in the thickness direction. The outer layer portion has an outer layer sheet made of a sheet material constituting an outer surface on the non-skin side, and an outer layer elastic body interposed between the outer layer sheet and the intermediate layer sheet and extensibly joined and fixed. , the outer layer elastic body is arranged to have an extending direction at least along the waist circumference direction,
3. The pants-type wearing article according to claim 2, wherein said non-skin-side elastic region includes said outer layer elastic body. The outer layer portion is a stretchable outer layer sheet that constitutes the outer surface on the non-skin side,
3. The pants-type wearing article according to claim 2, wherein said non-skin-side elastic region includes said stretchable outer layer sheet. The inner layer portion has an inner layer sheet made of a sheet material constituting an inner surface on the skin side, and an inner layer elastic body interposed between the inner layer sheet and the middle layer sheet and extensibly joined and fixed, the inner layer elastic body is arranged with an extending direction along at least the waist circumference direction,
The underpants-type wearing article according to any one of claims 2 to 4, wherein the skin-side elastic region includes the inner layer elastic body. The inner layer portion is a stretchable inner layer sheet that constitutes the inner surface on the skin side,
The underpants-type wearing article according to any one of claims 2 to 4, wherein the skin-side elastic region includes the stretchable inner layer sheet. The outer layer portion has an outer layer sheet made of a sheet material constituting an outer surface on the non-skin side, and an outer layer elastic body interposed between the outer layer sheet and the intermediate layer sheet and extensibly joined and fixed. , the outer layer elastic body is arranged so as to extend in at least the waist circumference direction, and the non-skin-side elastic region includes the outer layer elastic body;
The inner layer portion has an inner layer sheet made of a sheet material constituting an inner surface on the skin side, and an inner layer elastic body interposed between the inner layer sheet and the middle layer sheet and extensibly joined and fixed, The inner layer elastic body is arranged with an extension direction at least in the waist circumference direction, and the skin-side elastic region includes the inner layer elastic body,
the outer layer elastic body and the inner layer elastic body are arranged at positions where they overlap in the thickness direction to constitute the overlapping portion;
3. The underpants-type wearing article according to claim 2, wherein the contraction rate of said inner layer elastic body in the direction around the waist is smaller than the contraction rate of said outer layer elastic body in the direction around the waist. 8. The overlapping portion according to claim 7, wherein a length of adhesion between the outer elastic body and the middle layer sheet in the waist circumference direction is longer than a length of adhesion between the inner elastic body and the middle layer sheet in the waist circumference direction in the overlapping portion. Pants type wearing article. In a region closer to the waist opening than the overlapping portion, a stretchable waist elastic body is arranged along the waist circumference direction X, and the waist elastic body is interposed between the outer layer sheet and the middle layer sheet. It is joined and fixed in an extended state,
The shrinkage ratio of the waist elastic in the waist direction is larger than the shrinkage ratio of the inner layer elastic in the waist direction in the overlapping portion, and is smaller than the contraction ratio of the outer layer elastic in the waist direction in the overlapping portion. The underpants-type wearing article according to claim 7 or 8, wherein The underpants-type wearing article according to any one of claims 7 to 9, wherein the inner layer elastic body is a filamentous body, and the basis weight of the middle layer sheet is lower than the basis weight of the inner layer sheet. A plurality of the inner layer elastic bodies are arranged from the overlapping portion to a region extending from the overlapping portion to the crotch portion side, are interposed between the inner layer sheet and the intermediate layer sheet, and are joined and fixed in a stretched state,
the inner layer elastic body extends along the waist circumference direction, and a plurality of the inner layer elastic bodies are arranged parallel to each other;
The underpants-type wearing article according to any one of claims 7 to 10, wherein the inner layer elastic body does not overlap the outer layer elastic body in the thickness direction in the region extending toward the crotch portion. the outer layer elastic bodies extend along the waist circumference direction, and a plurality of the outer layer elastic bodies are arranged parallel to each other;
At least a portion of the inner layer elastic body has an extending direction that intersects with the extending direction of the outer layer elastic body and descends toward the crotch portion side, and a plurality of the inner layer elastic bodies are arranged parallel to each other. and
an intersection portion of the outer layer elastic body and the inner layer elastic body is present at a portion where the inner layer elastic body begins to descend toward the crotch portion, and the intersection portion forms the overlapping portion;
2. In the intersecting portion, the number of points at which the outer layer elastic body intersects with the inner layer elastic body in the extending direction of the outer layer elastic body is greater on the leg opening side than on the waist opening side. The pants-type wearing article according to any one of 7 to 10. The dorsal exterior body forming the outer surface main body of the dorsal portion and the ventral exterior body forming the outer surface main body of the ventral portion are joined at both left and right side edges by side seal portions,
The number of elastic bodies in the portion of the abdominal exterior body joined to the overlapping portion of the dorsal exterior body via the side seal portion is less than the number of elastic bodies arranged in the overlapping portion. The pants-type wearing article according to any one of claims 7 to 12. The dorsal exterior body forming the outer surface main body of the dorsal portion and the ventral exterior body forming the outer surface main body of the ventral portion are joined at both left and right side edges by side seal portions,
8. A portion of said abdominal exterior body joined via said overlapping portion of said dorsal exterior body and said side seal portion is composed of a middle layer sheet and an inner layer sheet constituting said ventral exterior body. 14. The pants-type wearing article according to any one of items 1 to 13. In the overlapping portion, the outer layer elastic body is a filamentous body, and is sandwiched and joined between the outer layer sheet and the middle layer sheet, and the outer layer sheet is made of a stretchable sheet, and the outer layer sheet contracts in the waist circumference direction. The underpants-type wearing article according to any one of Claims 7 to 14, wherein the shrinkage ratio of the inner layer elastic body in the waist circumference direction is larger than that of the inner layer elastic body. In the overlapping portion, the outer layer elastic body and the middle layer sheet are not arranged, the outer layer sheet is made of a stretchable sheet, and is intermittently joined to the inner layer sheet, and the inner layer elastic body is a comb gun type adhesive. The underpants-type wearing article according to any one of claims 7 to 14, wherein the outer layer sheet and the inner layer sheet are bonded at a layer between the bonding portions of the outer layer sheet and the inner layer sheet.

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