Composite stretchable member and wearable article using same
Provided are a composite stretchable member and wearing article capable of improving design properties at the time of contraction. A composite stretchable member stretchable in a specific direction includes two sheets facing each other, and a plurality of elastic members extending along the specific direction and being stretchable in the specific direction between the sheets. The sheets are bonded to each other at first bonding sections. Each first bonding section continuously extends along the intersecting direction intersecting the specific direction and intersects the elastic members. Each elastic member is bonded to each sheet at an intersection with the corresponding one of the first bonding sections. Each first bonding section has a wavy-line-shape extending in the intersecting direction with convex portions and concave portions that alternately appear continuously. Two adjacent first bonding sections are disposed with the convex portions or the concave portions that at least partially overlap each other.
1 . A composite stretchable member that is stretchable in a longitudinal direction and includes a part to be used as a waistline portion of each of a plurality of wearing articles, the composite stretchable member comprising:
two sheets facing each other; and
a plurality of elastic members extending along the longitudinal direction and being stretchable in the longitudinal direction between the sheets,
the sheets being bonded to each other at a plurality of first bonding sections,
each of the first bonding sections continuously extending along a width direction intersecting the longitudinal direction to intersect the plurality of elastic members,
each of the elastic members being bonded to each of the sheets at an intersection with the corresponding one of the first bonding sections, and
each of the first bonding sections having a wavy line shape extending in the width direction with convex portions and concave portions that alternately appear continuously, and being disposed in a state where the convex portions and the concave portions are overlapped each other when viewed from the longitudinal direction in at least a part of two adjacent first bonding sections,
wherein the part includes:
a pair of joining regions provided at the opposite ends of the part, and extending linearly in the width direction, and
a second bonding section formed between one of the pair of joining regions and the first bonding section closest to the one joining region and another second bonding section formed between the other joining region and the first bonding section closest to the other joining region, the second bonding sections linearly extending an entire length of the width direction.
2 . The composite stretchable member according to claim 1 , wherein
the two adjacent first bonding sections are disposed with both the bonding sections coinciding in phase with each other in the width direction in at least one region.
3 . The composite stretchable member according to claim 1 , wherein
the plurality of first bonding sections is disposed at intervals that are set to have a space between the two adjacent first bonding sections, being closed by the convex portion of at least one of the two first bonding sections when viewed from the width direction.
4 . A wearing article comprising a waistline portion disposed around a waistline of a wearer, wherein at least a part of the waistline portion is formed of the composite stretchable member according to claim 1 .
5 . The wearing article according to claim 4 , wherein
the waistline portion has a front abdomen portion disposed on a front of an abdomen of a wearer and a rear back portion disposed on buttocks of the wearer,
the waistline portion is formed in an annular shape by joining the front abdomen portion to the rear back portion with a pair of the joining regions,
the front abdomen portion and the rear back portion are formed of the composite stretchable member,
the composite stretchable member is disposed with the longitudinal direction aligning with a waistline direction of the waistline portion, and
the joining regions each include at least partially a non-formation region where an intersection of the first bonding section and the elastic member is not formed.
6 . The wearing article according to claim 5 , wherein a plurality of the second bonding sections is formed side by side.
7 . The wearing article according to claim 4 , further comprising:
an absorbent body that absorbs liquid,
wherein the absorbent body is overlapped with and fixed to the composite stretchable member constituting the waistline portion, and
in a region other than an overlapped portion in the composite stretchable member where the absorbent body is overlapped with the composite stretchable member, an intersection of the first bonding section and the elastic member are formed, and the elastic member is disconnected in the overlapped portion.
8 . The wearing article according to claim 7 , wherein
the overlapped portion has an edge extending linearly in the width direction, and
at least one third bonding section extending linearly in the width direction is formed between the overlapped portion and the first bonding section closest to the overlapped portion.
9 . The composite stretchable member according to claim 2 , wherein
the plurality of first bonding sections is disposed at intervals that are set to have a space between the two adjacent first bonding sections, being closed by the convex portion of at least one of the two first bonding sections when viewed from the width direction.
10 . The wearing article according to claim 5 , further comprising:
an absorbent body that absorbs liquid,
wherein the absorbent body is overlapped with and fixed to the composite stretchable member constituting the waistline portion, and
in a region other than an overlapped portion in the composite stretchable member where the absorbent body is overlapped with the composite stretchable member, an intersection of the first bonding section and the elastic member are formed, and the elastic member is disconnected in the overlapped portion.
11 . The wearing article according to claim 6 , further comprising:
an absorbent body that absorbs liquid,
wherein the absorbent body is overlapped with and fixed to the composite stretchable member constituting the waistline portion, and
in a region other than an overlapped portion in the composite stretchable member where the absorbent body is overlapped with the composite stretchable member, an intersection of the first bonding section and the elastic member are formed, and the elastic member is disconnected in the overlapped portion.
12 . The wearing article according to claim 10 , wherein
the overlapped portion has an edge extending linearly in the width direction, and
at least one third bonding section extending linearly in the width direction is formed between the overlapped portion and the first bonding section closest to the overlapped portion.
13 . The wearing article according to claim 11 , wherein
the overlapped portion has an edge extending linearly in the width direction, and
at least one third bonding section extending linearly in the width direction is formed between the overlapped portion and the first bonding section closest to the overlapped portion.