JP2013233383A - Underpants-type absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underpants-type absorbent article allowing a side sealed part to be easily continuously torn in the longitudinal direction when the side sealed part is torn to take off the absorbent article to be discarded.SOLUTION: An underpants-type absorbent article 1A includes an exterior body 2 and an absorbent body 3. Both side edges of an abdominal side part A and both side edges of a back side part B of the exterior body 2 are joined to each other to form side sealed parts S, a waist opening part WO and leg opening parts LO. Each side sealed part S has a plurality of joint parts 5 intermittently formed in the longitudinal direction X. The plurality of joint parts 5 are disposed in such a pattern that the angle of inclination α1 relative to the lateral direction Y is larger in the leg opening part LO side than in the waist opening part WO side, and that the joint part 5 closest to the waist opening part WO is substantially parallel to the lateral direction Y.

Description

  The present invention relates to a pants-type absorbent article.

Conventionally, various patterns are known for the joint portion of the side seal portion in a pants-type absorbent article such as a pants-type disposable diaper.
For example, the side seal part in the pants-type disposable diaper described in Patent Document 1 is formed by a plurality of joint lines arranged intermittently, and a part of the plurality of joint lines is in the lateral direction of the disposable diaper. It inclines so that it may rise as it goes outward from the inside.
Moreover, as for the side seal part in the underpants-type disposable diaper described in Patent Document 2, a plurality of intermittently arranged joints are parallel to each other, as they go from the inner side to the outer side in the lateral direction of the absorbent article. It is inclined in one direction so as to descend.

Japanese Patent Laid-Open No. 5-15551 JP 2002-102283 A

  Usually, when removing a pants-type absorbent article such as a pants-type disposable diaper for disposal, the side seal portion is torn in the longitudinal direction of the diaper. At that time, depending on the arrangement pattern of the joints constituting the side seal part, the tear of the sheet proceeds in the lateral direction, and the tear of the sheet extends to the inner part of the diaper than the side seal part, or the side of the diaper It may reach the edge and break off in the middle. When such lateral tearing occurs, it becomes difficult to tear the side seal part continuously and smoothly in the longitudinal direction of the diaper.For example, the user must reapply force to tear the side seal part in the longitudinal direction again. In other words, it takes time and effort to break the side seal portion.

In the side seal portion in Patent Document 1, a part of the plurality of joining lines constituting the slope is provided so as to rise as it goes from the inner side in the lateral direction to the outer side. Therefore, when the side seal portion is torn for removal for the purpose of discarding, the side seal portion is easily torn along the rising joining line, so that the side seal portion is likely to be broken, and it takes time and effort to break the side seal portion.
Moreover, in the side seal part in patent document 2, the some junction part is provided in parallel mutually at a uniform angle. Therefore, also in the side seal part of patent document 2, when tearing a side seal part, there exists a possibility that a lateral tear may occur.

  Therefore, the subject of this invention is providing the underpants type absorbent article which can tear a side seal part continuously continuously in the vertical direction, when tearing and removing a side seal part for the purpose of discarding.

  The present invention comprises an exterior body and an absorbent main body fixed to the inside of the exterior body, and the exterior body is disposed on the abdomen side of the wearer at the time of wearing and the wearer's body at the time of wearing. A dorsal side portion disposed on the dorsal side, both side edges of the abdominal side portion and the dorsal side portion are joined to form a pair of side seal portions, and a waist opening and a pair of legs Each of the pair of side seal parts has a plurality of joints intermittently formed in a longitudinal direction of the pant-type absorbent article, and has a plurality of joints. The joint portion has a pattern in which an inclination angle with respect to a lateral direction of the pant-type absorbent article is larger on the leg opening side than on the waist opening side, and the joint portion closest to the waist opening is the Parallel to the lateral direction of the pant-type absorbent article There is provided a pant-type absorbent articles are arranged in turn.

  The pants-type absorbent article of the present invention can easily tear the side seal part continuously in the vertical direction when the side seal part is torn and removed for the purpose of disposal.

FIG. 1 is a perspective view showing a pants-type disposable diaper according to the first embodiment of the present invention. FIG. 2 is a plan view showing a seal pattern of a side seal portion of the disposable diaper shown in FIG. FIG. 3 is a cross-sectional view taken along the line II shown in FIG. FIG. 4: is a top view which shows the side seal part in the disposable diaper of 2nd Embodiment of this invention (FIG. 2 equivalent view). FIG. 5: is a top view which shows the side seal part in the disposable diaper of 3rd Embodiment of this invention (FIG. 2 equivalent figure).

  Below, the underpants type absorbent article of this invention is demonstrated, referring drawings based on the preferable embodiment. FIG. 1 shows a perspective view of a pants-type disposable diaper that is an embodiment of the pants-type absorbent article of the present invention, and FIG. 2 shows a seal pattern of a side seal portion of the disposable diaper shown in FIG. A plan view is shown. FIG. 3 is a cross-sectional view taken along the line II shown in FIG.

  A pants-type disposable diaper 1 </ b> A (hereinafter also referred to as a diaper 1 </ b> A) that is the first embodiment of the present invention includes an exterior body 2 and an absorbent main body 3 that is fixed to the inside of the exterior body 2. The exterior body 2 of the diaper 1 </ b> A has an abdominal side A disposed on the wearer's abdomen at the time of wearing and a back side B disposed on the back of the wearer at the time of wearing. Moreover, the exterior body 2 of the diaper 1 </ b> A also has a crotch part C that is located between the abdominal part A and the back part B and is arranged in the crotch part of the wearer when worn.

The diaper 1 </ b> A has a vertical direction extending through the crotch part C and a horizontal direction perpendicular to the vertical direction between the ventral side A and the back side B. The X direction shown in each figure is the vertical direction, and the Y direction shown in each figure is the horizontal direction. Since the longitudinal direction X of the diaper 1A is the vertical direction at the time of wearing in the abdominal side part A and the back side part B, the waist opening WO side in each of the abdominal side part A and the back side part B is above (or above). The crotch C side is also referred to as the lower side (or the lower side).
Moreover, in this specification, a "skin opposing surface" is a surface distribute | arranged to a wearer's skin side at the time of wear among the front and back both surfaces of each member, such as the absorptive main body 3, "Non-skin opposing surface" Is the surface of the front and back surfaces of each member such as the absorbent main body 3 that is directed to the side opposite to the wearer's skin when worn.

  In the diaper 1A, both side edges of the stomach side A and the back side B of the exterior body 2 are joined to form a pair of side seal portions S, S, a waist opening WO, and a pair of leg openings. LO and LO are formed. Specifically, as shown in FIG. 1, the diaper 1 </ b> A is formed by joining both sides of the abdominal side A of the exterior body 2 and both sides of the back side B of the exterior body 2 in the shape of a palm. A pair of side seal portions S, S is provided. Each side seal part S extends in the diaper longitudinal direction X, and extends from the peripheral edge We of the waist opening WO to the peripheral edge Le of the leg opening LO.

  Each of the pair of side seal portions S, S has a plurality of joint portions 5 formed intermittently in the vertical direction X as shown in FIGS. The joints 5 are arranged at intervals in the diaper longitudinal direction X. In the diaper 1A, a plurality of joints 5 having the same shape and size of the rectangular shape are substantially the entire length in the longitudinal direction X of the side seal part S. Are arranged at equal intervals.

  The joint portion 5 is a convex portion that applies ultrasonic sealing or heat sealing when the side portions of the abdominal side portion A and the back side portion B of the exterior body 2 are overlapped and fused, for example, by applying ultrasonic waves or heat. The diaper 1 </ b> A appears as a concave portion having a shape corresponding to the convex portion. The plurality of joints 5 in the diaper 1 </ b> A are each formed using an ultrasonic seal, and the joints 5 arranged in the pattern shown in FIG. 2 appear on both the ventral side A and the back side B. ing. The side seal portion S is formed by joining regions of a predetermined width on the sides of the back side portion B and the abdominal side portion A, which are overlapped, by processing that generates the joint portion 5. In the diaper 1 </ b> A, as shown in FIG. 2, each side seal portion S includes a pair of side seal portions S and S as viewed from the back side portion B, and a plan view shape and an arrangement pattern of the joint portions 5. The planar view shape and arrangement pattern of the joint portion 5 that constitutes the pair of side seal portions S and S viewed from the ventral side portion A are bilaterally symmetric. As described above, the diaper 1 </ b> A is formed symmetrically including the shape and arrangement pattern of the joint portion 5.

  The joint 5 will be described in detail. The plurality of joints 5 have a pattern in which the inclination angle α1 (see FIG. 2) with respect to the lateral direction Y of the diaper 1A is larger on the leg opening LO side than on the waist opening WO side. Further, the joint 5 closest to the waist opening WO is arranged in a pattern substantially parallel to the lateral direction Y of the diaper 1A. Here, “substantially parallel” means not only the same direction as the lateral direction Y of the diaper 1A (inclination angle α1 is 0 °) but also an inclination angle α1 with respect to the lateral direction Y from the viewpoint of manufacturing errors and the like (see FIG. 2). ) Includes an absolute value within 4 °.

Specifically, as shown in FIG. 2, each of the plurality of joints 5 in the diaper 1 </ b> A has a rectangular shape, and has an end 51 on the lateral Y inner side and an end on the lateral Y outer side. 52, and has a rectangular long upper side 53u and a lower long side 53d.
As described above, the joint 5 closest to the waist opening WO among the plurality of joints 5 is arranged in a pattern substantially parallel to the lateral direction Y. In other words, the joint 5 closest to the waist opening WO has two long sides 53u and 53d extending in the lateral direction Y of the diaper 1A, and the end 51 and the end 52 of the joint 5 are: In the vertical direction X, they are arranged at substantially the same position.

  The remaining plurality of joints 5 except for the joints 5 closest to the waist opening WO are inclined with respect to the lateral direction Y of the diaper 1A as shown in FIG. 2 rather than the joints 5 closest to the waist opening WO. The angle α1 (see FIG. 2) is arranged in a pattern that increases from the waist opening WO side toward the leg opening LO side. Here, the inclination angle α1 (see FIG. 2) with respect to the lateral direction Y in the plurality of joints 5 may be formed so as to gradually increase from the waist opening WO side to the leg opening LO side. You may form so that it may become large in steps. The diaper 1A is formed so as to gradually increase as shown in FIG. In other words, in the diaper 1 </ b> A, as shown in FIG. 2, the plurality of joint portions 5 have an inclination angle α <b> 1 (see FIG. 2) that increases gradually and continuously from the waist opening WO side to the leg opening LO side. It is arranged in a pattern. Accordingly, in the plurality of joint portions 5, the inclination angle α1 (see FIG. 2) of the two long sides 53u and 53d that incline downward toward the outer side in the lateral direction Y is from the waist opening WO side to the leg opening LO side. It gradually increases continuously. As described above, when the joint portion 5 is arranged in a pattern in which the inclination angle α1 (see FIG. 2) gradually and continuously increases from the waist opening WO side to the leg opening LO side, the side of the sheet is further increased. There is an effect that tearing hardly occurs and the side seal portion S can be torn continuously and smoothly.

  In the diaper 1A, as shown in FIG. 2, the joint 5 closest to the leg opening LO among the plurality of joints 5 has two long sides 53u and 53d and an inclination angle α1 of 90 °. That is, it extends in the longitudinal direction X of the diaper 1 </ b> A, and the end portion 51 and the end portion 52 of the joint portion 5 are arranged at substantially the same position in the lateral direction Y. In particular, in the diaper 1 </ b> A, as shown in FIG. 2, the joint 5 closest to the leg opening LO among the plurality of joints 5 is the most leg opening LO among the plurality of leg elastic members 25 described later. The lower leg elastic member 25 and the waist elastic member 26 closest to the leg opening LO among the plurality of waist elastic members 26 to be described later are disposed at positions below the waist elastic member 26.

  Further, in the diaper 1A, as shown in FIG. 2, apart from the plurality of joints 5, the same size and the same size as the joint 5 from the joint 5 closest to the leg opening LO outward in the lateral direction Y. It has a joint 6. Specifically, the joint portion 6 of the diaper 1A has a rectangular shape like the joint portion 5, and is arranged at a distance from the joint portion 5 closest to the leg opening LO outwardly in the lateral direction Y. The diaper 1A It extends in the longitudinal direction X of the. The interval is preferably 1 mm or more and 5 mm or less. The joint portion 6 is also a part constituting the side seal portion S like the joint portion 5, and is formed in the same manner as the joint portion 5. By providing the joint part 6 different from the joint part 5, there is an effect of sufficiently maintaining the side seal strength of the leg opening part being mounted.

  In the diaper 1A, as shown in FIG. 2, the plurality of joint portions 5 constituting the side seal portion S are arranged such that end portions 51 on the inner sides in the lateral direction Y are arranged at substantially the same position in the lateral direction Y. Each end 51 is arranged on a straight line X ′ parallel to the vertical direction X.

  In the diaper 1 </ b> A, the plurality of joint portions 5 constituting the side seal portion S is one joint portion adjacent to the longitudinal direction X when the side seal portion S is viewed from the side in the lateral direction Y as shown in FIG. 2. 5 is provided between the end portion 52 on the outer side in the lateral direction Y of 5 and the end portion 51 on the inner side in the lateral direction Y of the other joint portion 5. The interval is preferably 0.5 mm or more and 4 mm or less. Thus, since the space | interval is taken, there exists an effect which makes the side seal intensity | strength in mounting | wearing and the tearing ease in the case of disposal compatible.

The laminated structure of the side seal part S in the diaper 1A will be described with reference to FIG. In FIG. 3, the laminated structure of the sheets of the stomach side A and the back side B in the vicinity of the side seal part S is shown, but each of the stomach side A and the back side B of the side seal part S is shown. The laminated structure of the sheet is also the same as the laminated structure shown in FIG.
As shown in FIG. 3, in the diaper 1 </ b> A, the exterior body 2 includes an outer layer sheet 21 that forms an outer surface, and an inner layer sheet 22 that is adjacent to the outer layer sheet 21 and is disposed on the skin facing surface side of the outer layer sheet 21. The auxiliary sheet 23a, 23b is disposed over the non-skin facing surface side of the folded portion on the upper side of the outer layer sheet 21 and the skin surface side of the inner layer sheet 22. The outer layer sheet 21 and the inner layer sheet 22 are arranged so as to extend from the abdominal side A to the back side B through the crotch part C, respectively. Auxiliary sheets 23a and 23b are disposed one by one on the abdominal side A and the back side B, respectively, both of which are on the skin facing surface side of the longitudinal end of the absorbent main body 3 and above the end. Covers the sides.

  In the diaper 1A, the side edges of the ventral side A and the back side B of the exterior body 2 that form the side seal portion S are, as shown in FIG. 3, an outer layer sheet 21, an inner layer sheet 22, and an auxiliary sheet, respectively. 23a (or 23b) is composed of a laminated sheet 20a (or 20b), and the side seal portion S includes a laminated sheet 20a constituting the ventral side A and a laminated sheet 20b constituting the back side B. It is formed by fusing.

The diaper 1A has a plurality of waist elastic members 24 extending in the diaper lateral direction Y on the waist opening WO side. That is, as shown in FIGS. 2 and 3, the outer package 2 of the diaper 1 </ b> A has a plurality of waist elastic members in a belt-like region extending in the lateral direction Y of the diaper 1 </ b> A along the peripheral edge We of the waist opening WO. A plurality of waist elastic members 24 are arranged and fixed between the outer layer sheet 21 and the auxiliary sheets 23a and 23b in a state of extending in the lateral direction Y.
The diaper 1 </ b> A has a plurality of leg elastic members 25 extending along the leg opening LO on the leg opening LO side. That is, as shown in FIG. 2, the outer package 2 of the diaper 1A has a plurality of leg elastic members 25 in a strip-like region extending along the peripheral edge Le of the leg opening LO, and has a plurality of leg elasticity. The member 25 is arranged and fixed between the outer layer sheet 21 and the inner layer sheet 22 in a state of extending along the peripheral edge Le.
Furthermore, as shown in FIGS. 2 and 3, the outer package 2 of the diaper 1 </ b> A has a plurality of waistline elastic members in a belt-like region extending from the waist elastic member 24 located at the lowest position to the plurality of leg elastic members 25. 26, and a plurality of waistline elastic members 26 are arranged between the auxiliary sheets 23a and 23b and the inner layer sheet 22 and between the inner layer sheet 22 and the outer layer sheet 21 in a state of extending in the lateral direction Y. It is fixed.

  Next, the relationship between the plurality of joint portions 5 constituting the side seal portion S and the elastic members 24, 25, 26 constituting the exterior body 2 will be described in detail. As shown in FIG. The joint 5 is disposed in parallel with the waist elastic member 24 closest to the waist opening WO. If arranged in parallel, the joint portion 5 closest to the waist opening WO and the waist elastic member 24 closest to the waist opening WO may be arranged at the same position in the longitudinal direction X so as to overlap each other. However, in the diaper 1A, the diapers 1A are arranged in parallel at intervals. Thus, by being spaced apart and arranged in parallel, there is an effect of obtaining a stable side seal strength without being affected by the elastic body at the time of sealing.

  Further, as described above, in the diaper 1A, the plurality of joint portions 5 are arranged at equal intervals over the substantially entire length in the vertical direction X of the side seal portion S, but the joint portions on the leg opening LO side. 2, 5 may be arranged so as to intersect with the plurality of leg elastic members 25, as shown in FIG. Specifically, each of the plurality of joints 5 on the leg opening LO side intersects with each of the plurality of leg elastic members 25 so as to correspond to each of the plurality of leg elastic members 25 as shown in FIG. The plurality of leg elastic members 25 may be arranged such that one of the plurality of joints 5 on the leg opening LO side corresponds to the plurality of leg elastic members 25. It may be arranged so as to cross the leg elastic member 25. As described above, since the joining portion 5 is arranged so as to intersect with the plurality of leg elastic members 25, a weak portion can be formed in the leg elastic member 25 at the time of sealing, and the side seal portion S can be made more smoothly. The effect which can be torn continuously is produced.

  From the same viewpoint, the plurality of joint portions 5 correspond to the plurality of waist elastic members 24 excluding the plurality of waist elastic members 26 and the waist elastic member 24 closest to the waist opening WO, respectively. It may be arranged so as to intersect with each of the waistline elastic members 26, and one joint portion 5 may be disposed so as to cross over a plurality of adjacent waist elastic members 24 and a plurality of adjacent waistline elastic members 26. May be.

The formation material of each part of the diaper 1A mentioned above is demonstrated.
The outer layer sheet 21, the inner layer sheet 22, and the auxiliary sheets 23a and 23b of the exterior body 2 constituting the ventral side part A and the back side part B are various sheet materials conventionally used for absorbent articles such as disposable diapers. Although it can use without a restriction | limiting, it is preferable to use a nonwoven fabric. As the nonwoven fabric, an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a single layer nonwoven fabric of a melt blown nonwoven fabric, or a laminated nonwoven fabric in which these layers are laminated in two or more layers is preferable. Moreover, the sheet | seat etc. which integrated the nonwoven fabric and the film etc. can also be used as the outer layer sheet | seat 21, the inner layer sheet | seat 22, and auxiliary sheet | seats 23a and 23b of the exterior body 2. FIG.
Moreover, it is preferable that the exterior body 2 is formed using the nonwoven fabric made from a polypropylene. That is, at least one of the outer layer sheet 21, the inner layer sheet 22, and the two auxiliary sheets 23a and 23b of the exterior body 2 constituting the side seal portion S is made of polypropylene formed only from polypropylene monofilament. It is preferable that it is a nonwoven fabric.

Examples of the material forming the waist elastic member 24, the leg elastic member 25, and the waist elastic member 26 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, and the like. Can do. As the form of each elastic member 24, 25, 26, the cross-section has a rectangular shape, square shape, circular shape, elliptical shape or polygonal shape such as a thread shape (thread rubber or the like), or a string shape (flat rubber etc.), or a multifilament type. The thread-like thing of these etc. can be used preferably.
The thickness of each elastic member 24, 25, 26 is preferably 310 dtex or more and 1240 dtex or less, and particularly preferably 620 dtex or more and 940 dtex or less.
The arrangement interval of the waist elastic members 24 is preferably 3 mm or more and 15 mm or less, particularly 4 mm or more and 10 mm or less. The arrangement interval of the waistline elastic member 26 is preferably 3 mm or more and 20 mm or less, particularly 4 mm or more and 10 mm or less.

  Absorbent articles such as disposable diapers are used as a top sheet (not shown), a back sheet (not shown), an absorber (not shown), a side cuff forming sheet (not shown), etc. that constitute the absorbent main body 3. Various kinds of materials conventionally used can be used without particular limitation.

The effect at the time of using the diaper 1A mentioned above is demonstrated.
As shown in FIGS. 1 and 2, the diaper 1A has a plurality of joint portions 5 in which a pair of side seal portions S and S are intermittently formed in the vertical direction X. The inclination angle α1 with respect to the lateral direction Y is larger on the leg opening LO side than on the waist opening WO side, and the joint 5 closest to the waist opening WO is arranged in a pattern substantially parallel to the lateral direction Y. ing. Thus, the diaper 1A is not formed with the joint portion 5 inclined upward in the lateral direction Y, and the joint portion 5 closer to the leg opening portion LO side than the waist opening portion WO side. It is formed in a pattern having a large inclination angle α1. Therefore, when tearing and removing the side seal portion S from the waist opening WO side for the purpose of discarding the diaper 1A, the direction of the tearing force and the inclination angle α1 of the joint portion 5 are substantially the same. It is difficult to occur, and the break position of the side seal portion S is concentrated at the position of the end portion 51 on the inner side in the lateral direction Y of each joint portion 5, and breakage is likely to occur along the line connecting the end portions 51. The side seal portion S can be easily torn continuously in the longitudinal direction X.

  1 and 2, the diaper 1A is formed such that the inclination angle α1 of the plurality of joints 5 gradually increases from the waist opening WO side to the leg opening LO side. Therefore, the above effects can be further achieved. In particular, as shown in FIGS. 1 and 2, the diaper 1 </ b> A has a plurality of joints 5 as viewed from the side of the side seal part S and laterally outward Y of one joint 5 adjacent to the longitudinal direction X. Since it is arranged so as to have a gap Q between the end 52 on the side and the end 51 on the inner side in the lateral direction Y of the other joint 5, the strength of the side seal during mounting, The effect which balances tearing ease can be show | played.

  In the diaper 1 </ b> A, since the plurality of joining portions 5 are formed by using an ultrasonic seal, the outer layer sheet 21, the inner layer sheet 22, and the two auxiliary sheets of the exterior body 2 constituting the side seal portion S. If both 23a and 23b are made of a polypropylene non-woven fabric (polypropylene monofilament 100%) made only of polypropylene monofilaments, the non-woven fabric interface is not peeled off, and the non-woven fabric is easily broken. Therefore, the side seal portion S is more easily torn in the vertical direction X, and the breaking position in the lateral direction Y of the side seal portion S is further less likely to vary. Of the outer layer sheet 21, the inner layer sheet 22, and the two auxiliary sheets 23a and 23b of the exterior body 2 constituting the side seal portion S, at least one sheet is a polypropylene non-woven fabric composed of only polypropylene single fibers. In some cases, similar effects can be achieved.

From the viewpoint of achieving the above-described effects, the total length L (see FIG. 2) of the side seal portion S is preferably 50 mm or greater and 200 mm or less, and more preferably 100 mm or greater and 150 mm or less. As shown in FIG. 2, the total length L of the side seal portion S measures the distance between the peripheral edge portion We of the waist opening WO and the peripheral edge portion Le of the leg opening LO along the diaper longitudinal direction X.
In addition, the joint 5 has a ratio between the length La in the vertical direction (long side length in the case of a rectangle) and the maximum width Lb in the direction orthogonal thereto (length of short side in the case of a rectangle) ( La / Lb) is preferably 1.4 or more and 35 or less, and particularly preferably 2.8 or more and 15 or less. The total length La of the joint portion 5 is preferably 2.8 mm to 14 mm, particularly preferably 2.8 mm to 6 mm. The maximum width Lb of the joint portion 5 is 0.4 mm to 2 mm, particularly 0.4 mm. It is preferable that it is 1 mm or less.
Moreover, the pitch P (diameter between corresponding parts, see FIG. 2) in the longitudinal direction X of the diaper of the joint portion 5 is preferably 1.5 mm or more and 4.5 mm or less, particularly preferably 3 mm or more and 4 mm or less. The La content is preferably 50% to 150%, particularly preferably 100% to 130%.
Further, it is preferable that 10 or more and 220 or less, particularly 25 or more and 50 or less, of the joining portions 5 are arranged in the longitudinal direction X of the side seal portion S.

Next, the diaper of 2nd-3rd embodiment of this invention is demonstrated based on FIGS. 4-5.
About the diaper 1B-1C (henceforth "diaper 1B-1C") of 2nd-3rd embodiment, a different point from the diaper 1A of 1st Embodiment is demonstrated. The point which is not demonstrated especially is the same as that of the diaper 1A, and description of the diaper 1A is applied suitably.

  The diaper 1B of 2nd Embodiment replaces the arrangement pattern of the junction part 5 in the side seal part S in the diaper 1A of 1st Embodiment with the arrangement pattern shown in FIG. In the diaper 1B, the joint 5 that forms the side seal portion S has a rectangular shape, like the diaper 1A. Also in the diaper 1B, similarly to the diaper 1A, a plurality of joint portions 5 having the same shape and the same size are disposed at equal intervals over the substantially entire length in the longitudinal direction X of the side seal portion S.

  As shown in FIG. 4, the plurality of joints 5 in the diaper 1B of the second embodiment are such that the end 51 on the inner side in the lateral direction Y of the diaper 1B faces from the waist opening WO side to the leg opening LO side. The diapers 1B are arranged on a virtual straight line LA inclined so as to spread outward in the lateral direction Y with respect to the longitudinal direction X of the diaper 1B. Here, the straight line X ′ in FIG. 4 is parallel to the longitudinal direction X of the diaper 1B, in particular, the diaper longitudinal direction X center line extending along the longitudinal direction X of the diaper 1B that bisects the diaper 1B into the lateral direction Y. It is a straight line. The virtual straight line LA is inclined at an inclination angle α2 with respect to the straight line X ′. In the diaper 1B of the second embodiment, the end portions 51 on the inner side of the diaper 1B in the lateral direction Y are aligned on the imaginary straight line LA in all the joint portions 5 that form the side seal portion S. The inclination angle α2 (see FIG. 4) is preferably 1 ° to 20 °, particularly preferably 5 ° to 10 °. Note that the position of the end 51 of the joint 5 is the distance from the center line X in the longitudinal direction of the diaper 1B when the waist elastic member 24, the leg elastic member 25, and the waistline elastic member 26 of the diaper 1B are extended. It is preferable to judge based on the above.

The effect at the time of using the diaper 1B mentioned above is demonstrated.
About the effect of the diaper 1B, a different point from the effect of the diaper 1A is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

  As shown in FIG. 4, the diaper 1 </ b> B is not formed with the joint portion 5 that is inclined upward in the lateral direction Y outward, like the diaper 1 </ b> A, and the leg opening LO from the waist opening WO side. The joint portion 5 on the side is formed in a pattern having a large inclination angle α1. And as for the diaper 1B, as shown in FIG. 4, the position of the edge part 51 of each junction part 5 is located in a line on the straight line LA inclined with respect to the vertical direction X of the diaper 1B. For this reason, the lateral tearing of the sheet is less likely to occur, and the side seal portion S can be torn continuously more smoothly.

  Next, the diaper 1C of the third embodiment is obtained by replacing the shape and the arrangement pattern of the joint portion 5 in the side seal portion S as shown in FIG. 5 in the diaper 1A of the first embodiment. In the diaper 1 </ b> C, a plurality of triangular joints 5 having the same shape and the same size are arranged at equal intervals over substantially the entire length of the side seal portion S in the vertical direction X.

  As shown in FIG. 5, each of the plurality of joint portions 5 in the diaper 1 </ b> C of the third embodiment has a triangular shape with the same area. The joint 5 of the triangular diaper 1 </ b> C has two sides 54 u and 54 d forming an acute corner, and the tip of the corner is an end 51 on the inner side in the diaper lateral direction Y. . In the plurality of joint portions 5 of the diaper 1C, the inclination angle α1 (see FIG. 5) between the triangular side 54u and the diaper lateral direction Y gradually increases from the waist opening WO side to the leg opening LO side. Along with this, the triangular side 54d is also inclined so as to gradually descend. The remaining one side 54s of the triangular joint 5 is parallel to the longitudinal direction X of the diaper.

  In the diaper 1 </ b> C, the plurality of triangular joints 5 are lateral directions of one joint 5 adjacent to the longitudinal direction X when the side seal portion S is viewed from the side in the lateral direction Y as shown in FIG. 5. The end portion 52 on the Y outer side and the end portion 51 on the inner side in the lateral direction Y of the other joining portion 5 are arranged so as to overlap each other.

  As shown in FIG. 5, the plurality of joints 5 in the diaper 1 </ b> C of the third embodiment are such that the end 51 on the inner side in the lateral direction Y of the diaper 1 </ b> C faces from the waist opening WO side to the leg opening LO side. The diapers 1C are arranged on a virtual straight line LA inclined so as to spread outward in the horizontal direction Y with respect to the vertical direction X. Here, the straight line X ′ in FIG. 5 is parallel to the longitudinal direction X of the diaper 1C, in particular, the diaper longitudinal direction X center line extending along the longitudinal direction X of the diaper 1C that bisects the diaper 1C into the lateral direction Y. It is a straight line. The virtual straight line LA is inclined at an inclination angle α2 with respect to the straight line X ′. In the diaper 1C of the third embodiment, the end portions 51 on the inner side in the lateral direction Y of the diaper 1C are aligned on the virtual straight line LA in all the joint portions 5 that form the side seal portion S. The inclination angle α2 (see FIG. 5) is preferably 1 ° to 20 °, particularly preferably 5 ° to 10 °. The position of the end 51 of the joint 5 is the distance from the center line X in the longitudinal direction of the diaper 1C when the waist elastic member 24, the leg elastic member 25 and the waistline elastic member 26 of the diaper 1C are extended. It is preferable to judge based on the above.

The effect at the time of using the diaper 1C mentioned above is demonstrated.
About the effect of the diaper 1C, a different point from the effect of the diaper 1A is demonstrated. The point which is not demonstrated especially is the same as that of the effect of diaper 1A, and description of the effect of diaper 1A is applied suitably.

  As shown in FIG. 5, the diaper 1 </ b> C is not formed with the joint portion 5 inclined upward in the lateral direction Y outward as in the case of the diaper 1 </ b> A, and the leg opening LO from the waist opening WO side. The joint portion 5 on the side is formed in a pattern having a large inclination angle α1. And as for the diaper 1C, as shown in FIG. 5, the shape of each junction part 5 is a triangle shape, The acute corner | angular part (end part 51) front-end | tip of each triangular junction part 5 is the vertical direction of the diaper 1C. They are arranged on a straight line LA inclined with respect to X. For this reason, the lateral tearing of the sheet is less likely to occur, and the side seal portion S can be torn continuously more smoothly.

  Further, as shown in FIG. 5, the diaper 1C is arranged so that the end portions 51 and 52 of the joint portions 5 and 5 adjacent to each other in the longitudinal direction X overlap each other when the side seal portion S is viewed from the side in the lateral direction Y. Therefore, the fragile portion can be formed in the leg elastic member 25 and the waistline elastic member 26 at the time of sealing, and the side seal portion S can be more smoothly and continuously torn.

  The pants-type absorbent article of the present invention is not limited to the diaper 1A of the first embodiment, the diaper 1B of the second embodiment, and the diaper 1C of the third embodiment, and can be appropriately changed. Moreover, each component in the diaper 1A-1C of the above-mentioned 1st-3rd embodiment can be implemented in combination suitably in the range which does not impair the meaning of this invention.

  For example, in the side seal portions S of the diapers 1A to 1C of the above-described first to third embodiments, as shown in FIGS. 2, 4 and 5, the rectangular shape or the same shape and the same size. A plurality of triangular joints 5 are formed at equal intervals over substantially the entire length in the longitudinal direction X of the side seal part S, but the joints 5 may not be the same shape and the same size. It does not need to be arranged at equal intervals.

  Moreover, the side seal part S of the diapers 1A to 1C of the above-described first to third embodiments is formed by a rectangular or triangular joint 5 as shown in FIGS. However, it may not be rectangular or triangular, for example, it may be elliptical. When the shape of the joint portion 5 is an elliptical shape, the joint portion 5 may be arranged in a pattern in which the major axis of the elliptical shape has an inclination angle α1.

  Moreover, in the side seal part S of the diapers 1A to 1C of the above-described first to third embodiments, as shown in FIG. 2, FIG. 4 and FIG. The both sides of the back side portion B of the body 2 are joined in the shape of a palm, but may not be joined in the shape of a palm, or may simply be overlapped.

  The pant-type absorbent article may be a pant-type disposable diaper for infants or adults, a pants-type (shorts-type) sanitary napkin, or the like.

The following pant-type absorbent articles are disclosed with respect to the embodiment described above.
<1> An exterior body and an absorbent main body fixed to the inside of the exterior body, wherein the exterior body is disposed on the stomach side of the wearer when worn and the back of the wearer when worn. A back side portion disposed on the side, both side edges of the abdominal side portion and the back side portion are joined to form a pair of side seal portions, and a waist opening portion and a pair of leg openings A pants-type absorbent article formed with a part,
Each of the pair of side seal portions has a plurality of joint portions formed intermittently in the longitudinal direction of the pant-type absorbent article,
The plurality of joint portions have a pattern in which an inclination angle with respect to a lateral direction of the pant-type absorbent article is larger on the leg opening side than on the waist opening side, and the joint portion closest to the waist opening portion. A pant-type absorbent article is arranged in a pattern substantially parallel to the lateral direction of the pant-type absorbent article.
<2> The pair of side seal portions described in <1>, wherein both side portions of the ventral side portion of the exterior body and both side portions of the back side portion of the exterior body are joined in a palm-like shape. Pants-type absorbent article.
<3> The pants-type absorbent article according to <1> or <2>, wherein the plurality of joint portions are arranged at intervals in the longitudinal direction of the pants-type absorbent article.
<4> The pant-type absorbent article according to <3>, wherein the plurality of joint portions are arranged at equal intervals over substantially the entire length in the longitudinal direction of the side seal portion.
<5> Any one of the items <1> to <4>, wherein the shape and arrangement pattern of the joint portions constituting the pair of side seal portions as viewed from the ventral side portion are symmetrical. The pants-type absorbent article described in 1.
<6> The pant-type absorbent article according to <5>, wherein the pant-type absorbent article is formed symmetrically including the shape and arrangement pattern of the joint portion.
<7> The pants-type absorbent article according to any one of <1> to <6>, wherein the joint portion closest to the waist opening is arranged in the same direction as a lateral direction of the pants-type absorbent article. .
<8> In the above <1> to <7>, the inclination angle with respect to the lateral direction in the plurality of joints is formed so as to gradually increase from the waist opening side toward the leg opening side. The underpants type absorbent article according to any one of the above.
<9> The <1> to <7, wherein the inclination angle with respect to the lateral direction of the plurality of joints is formed to increase stepwise from the waist opening side toward the leg opening side. > The underpants type absorbent article of any one of>.
<10> Among the plurality of joints, the joint closest to the leg opening is provided with two long sides so that the inclination angle is 90 °. > The underpants type absorbent article of any one of>.

<11> Any one of the above <1> to <10>, wherein the plurality of joints are arranged in a pattern in which the inclination angle gradually increases from the waist opening side toward the leg opening side. A pants-type absorbent article according to claim 1.
<12> A plurality of elastic waist members extending in the lateral direction of the pant-type absorbent article on the waist opening side,
The underpants-type absorbent article according to any one of <1> to <11>, wherein the joint portion closest to the waist opening is arranged in parallel with the waist elastic member closest to the waist opening. .
<13> A plurality of leg elastic members extending along the leg opening on the leg opening side,
The underpants-type absorbent article according to any one of <1> to <12>, wherein the joint portion on the leg opening side is arranged so as to intersect with the plurality of leg elastic members.
<14> A plurality of the joint portions are arranged such that end portions on the laterally inner side of the pant-type absorbent article are vertically aligned with the pants-type absorbent article from the waist opening side toward the leg opening side. The underpants-type absorbent article according to any one of <1> to <13>, which is arranged on a virtual straight line that is inclined so as to spread outward in the lateral direction with respect to the direction.
<15> The pants-type absorbent article according to any one of <1> to <14>, wherein the plurality of joint portions are rectangular.
<16> The pants-type absorbent article according to any one of <1> to <14>, wherein each of the plurality of joint portions has a triangular shape with the same area.
<17> The above-described <1> to <<>, wherein two or more of the joint portions form an acute corner, and the tip of the corner is an end portion on the inner side in the diaper lateral direction. 14>. The underpants type absorbent article according to any one of 14>.
<18> A nonwoven fabric is used as the exterior body, and the nonwoven fabric is an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a single layer nonwoven fabric of a melt blown nonwoven fabric, or a laminate in which two or more layers are laminated. The underpants-type absorbent article according to any one of <1> to <17>, wherein a nonwoven fabric is used.
<19> Of the outer layer sheet, the inner layer sheet, and the two auxiliary sheets of the outer package constituting the side seal portion, at least one sheet is a polypropylene non-woven fabric formed only from polypropylene monofilaments. The pants-type absorbent article according to any one of <1> to <18>.

<20> The pants-type absorbent article according to any one of <1> to <19>, wherein the exterior body is formed using a nonwoven fabric made of polypropylene.
<21> The plurality of joints are formed by pressing the sides of the abdomen and the dorsal side of the exterior body and pressurizing with a convex portion that performs ultrasonic sealing or heat sealing. The underpants-type absorbent article according to any one of <1> to <20>.
<22> The pants-type absorbent article according to any one of <1> to <21>, wherein each of the plurality of joints is formed using an ultrasonic seal.
<23> A plurality of leg elastic members extending along the leg opening on the leg opening side, a plurality of waist elastic members extending in the lateral direction of the pant-type absorbent article on the waist opening side, and the lowermost A plurality of waistline elastic members in a belt-like region extending from the waist elastic member to a plurality of leg elastic members, and a joint portion closest to the leg opening among the plurality of joint portions is The leg elastic member closest to the leg opening in the leg elastic member and the waist elastic member closest to the leg opening among the plurality of waist elastic members among the plurality of waist elastic members are arranged at positions below the < The underpants-type absorbent article according to any one of 1> to <22>.
<24> The exterior body includes a plurality of waist elastic members in a belt-like region extending in a lateral direction of the pant-type absorbent article along a peripheral edge portion of the waist opening, and the plurality of waist elastic members The pants type according to any one of <1> to <22>, wherein the member is arranged and fixed between the outer layer sheet and the auxiliary sheet in a state of extending in the lateral direction of the pant type absorbent article. Absorbent article.
<25> A plurality of leg elastic members extending along the leg opening are provided on the leg opening side, and the joint on the leg opening side is arranged to intersect the leg elastic member. The underpants-type absorbent article according to any one of <1> to <22>.
<26> A plurality of leg elastic members extending along the leg opening on the leg opening side, and the plurality of joints on the leg opening side correspond to the plurality of leg elastic members, respectively. The pants-type absorbent article according to any one of <1> to <22>, wherein the pants-type absorbent article is arranged so as to intersect with each of the plurality of leg elastic members.
<27> A plurality of leg elastic members extending along the leg opening on the leg opening side, wherein one of the plurality of joints on the leg opening side has a plurality of the joints. The underpants-type absorptivity according to any one of <1> to <22>, wherein the pants-type absorptivity is arranged so as to cross the leg elastic member across the plurality of leg elastic members so as to correspond to the leg elastic members. Goods.
<28> A plurality of leg elastic members extending along the leg opening on the leg opening side, a plurality of waist elastic members extending in the lateral direction of the pant-type absorbent article on the waist opening side, and the lowermost A plurality of waistline elastic members in a belt-shaped region extending from the waist elastic member located at a plurality of the leg elastic members, and each of the plurality of joint portions includes the plurality of waistline elastic members and the waist Any one of <1> to <22> arranged so as to intersect with each of the plurality of waist elastic members so as to correspond to each of the plurality of waist elastic members excluding the waist elastic member near the opening. The pants-type absorbent article described in 1.
<29> A plurality of leg elastic members extending along the leg opening on the leg opening side, a plurality of waist elastic members extending in the lateral direction of the pant-type absorbent article on the waist opening side, and lowermost A plurality of waistline elastic members in a band-shaped region extending from the waist elastic member located at a plurality of the leg elastic members, and one of the plurality of joints is adjacent to each other. The pants-type absorbent article according to any one of <1> to <22>, wherein the pants-type absorbent article is arranged so as to cross over the waist elastic member and the plurality of adjacent waist elastic members.

1A, 1B, 1C Disposable diapers (pants-type absorbent articles)
2 Exterior body 21 Outer layer sheet 22 Inner layer sheet 23a, 23b Auxiliary sheet 24 Waist elastic member 25 Leg elastic member 26 Girth waist elastic member 3 Absorbent body 5 Joint portion 51 End portion on the laterally inner side at the joint portion 52 Lateral portion at the joint portion Ends 53u, 53d of the outer side in the direction Long sides 54u, 54d, 54s of the rectangular joint 6 Sides of the triangular joint 6 Joint WO Waist opening We Perimeter LO Leg opening S Perimeter S S Side seal Part A Ventral side, B Dorsal side, C Inseam

Claims (8)

An exterior body and an absorbent main body fixed to the inside of the exterior body, and the exterior body is disposed on an abdominal side portion disposed on the abdomen side of the wearer when worn and on a back side of the wearer when worn. The side portions of the abdomen and the dorsal side are joined to form a pair of side seals, and a waist opening and a pair of leg openings are formed. A pant-type absorbent article,
Each of the pair of side seal portions has a plurality of joint portions formed intermittently in the longitudinal direction of the pant-type absorbent article,
The plurality of joint portions have a pattern in which an inclination angle with respect to a lateral direction of the pant-type absorbent article is larger on the leg opening side than on the waist opening side, and the joint portion closest to the waist opening portion. A pant-type absorbent article is arranged in a pattern substantially parallel to the lateral direction of the pant-type absorbent article.   2. The pant-type absorbent article according to claim 1, wherein the plurality of joint portions are arranged in a pattern in which the inclination angle gradually increases from the waist opening side toward the leg opening side. A plurality of waist elastic members extending in the lateral direction of the pant-type absorbent article on the waist opening side;
The underpants type absorbent article according to claim 1 or 2, wherein the joint portion closest to the waist opening is arranged in parallel with the waist elastic member closest to the waist opening. A plurality of leg elastic members extending along the leg opening on the leg opening side;
The pants-type absorbent article according to any one of claims 1 to 3, wherein the joint portion on the leg opening side is arranged so as to intersect with the plurality of leg elastic members.   The plurality of joint portions are arranged such that an end portion on the laterally inner side of the pant-type absorbent article is directed from the waist opening side toward the leg opening side with respect to the longitudinal direction of the pant-type absorbent article. 5. The pant-type absorbent article according to claim 1, wherein the pants-type absorbent article is arranged on a virtual straight line that is inclined so as to spread outward in the lateral direction.   The pants type absorbent article according to any one of claims 1 to 5, wherein each of the plurality of joint portions has a triangular shape with the same area.   The pants-type absorbent article according to any one of claims 1 to 6, wherein the exterior body is formed using a polypropylene nonwoven fabric.   The pants-type absorbent article according to any one of claims 1 to 7, wherein each of the plurality of joint portions is formed using an ultrasonic seal.

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