Wearing article

Patent metadata

Field	Value
Publication number	US-9358162-B2
Application number	US-201113700781-A
Country	US
Kind code	B2
Filing date	May 30, 2011
Priority date	May 31, 2010
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A wearing article having a waist-opening that can be easily folded back along a fold line extending in a transverse direction without increasing the stiffness in the vicinity of the waist-opening. A diaper includes front and rear waist members and a crotch member. A liquid-absorbent structure of the crotch member is formed outboard of in a longitudinal direction of a core with front and rear flaps exclusively composed of an absorption surface wrapping sheet, a leakage-barrier sheet and a bottom surface wrapping sheet. The front and rear waist members include first regions overlapping the front and rear flaps, respectively, second regions lying adjacent to the associated first regions and third regions lying adjacent to the associated second regions. The front and rear waist members are provided with the first, second and third waist elastics attached between respective inner and outer sheets in the first, second and third regions, respectively. A tensile stress of the first regions and the third regions is adjusted to be lower than that of the second regions.

First claim

The invention claimed is:

1. A wearing article having a longitudinal direction and a transverse direction, comprising:
a chassis including a skin-facing side, a non-skin-facing side opposite to the skin-facing side, a front waist region, a rear waist region and a crotch region extending between these front and rear waist regions;
a liquid-absorbent member having front and rear ends extending across the crotch region into the front and rear waist regions, the liquid-absorbent member including a liquid-absorbing core, the liquid-absorbing core having front and rear ends; and
waist elastics contractibly attached to the front and rear waist regions under tension in the transverse direction, wherein:
the chassis includes front and rear waist ends extending in the transverse direction and lateral edges extending in the longitudinal direction; and
the front and rear waist regions are joined to each other along the lateral edges whereupon a waist-opening is defined by the front and rear waist ends and a pair of leg-openings is defined by the front and rear waist ends respectively adjacent to the crotch region and the crotch lateral edges, wherein:
the front and rear waist ends are arranged at a distance from the front and rear ends of the liquid-absorbent structure and this distance dimension is uniform in the front and rear waist regions;
a dimension in the longitudinal direction of the liquid-absorbent structure overlapping the front and rear waist regions is in the range of 70 to 98% of a total dimension in the longitudinal direction of the front and rear waist regions;
the front and rear waist regions respectively include first regions extending along the front and rear waist ends which first regions define the waist opening and which first regions at least partially overlap the liquid-absorbent structure and the front and rear waist regions further include second regions located between the first regions and the leg-openings and adjacent to the first regions;
the first regions are respectively provided with a plurality of first waist elastics extending in the transverse direction contractibly attached under tension to the respective first regions at a distance from the front and rear ends of the liquid-absorbent structure;
the front and rear ends of the liquid-absorbent structure are located in the first regions of the front and rear waist regions;
the front and rear ends of the liquid-absorbent core are located in the second regions of the front and rear waist regions; and
a tensile stress of the first regions is lower than that of the second regions.

2. The wearing article according to claim 1 , wherein the respective second regions are provided with a plurality of second waist elastics extending in the transverse direction and contractibly attached thereto under tension and the first waist elastics have a fineness smaller than that of the second waist elastics and a stretch ratio higher than that of the second waist elastics.

3. The wearing article according to claim 2 , wherein the liquid-absorbent structure includes a liquid-absorbent core, a wrapping sheet adapted to wrap the core and front and rear flaps lying outboard of the core front and rear ends as viewed in the longitudinal direction and respectively defined by the wrapping sheet, wherein the first waist elastics are attached so as to overlap at least partially with the front and rear flaps.

4. The wearing article according to claim 3 , wherein a tensile stress of the respective first regions corresponds to 70 through 90% of a tensile stress of the respective second regions.

5. The wearing article according to claim 4 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

6. The wearing article according to claim 3 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

7. The wearing article according to claim 2 , wherein a tensile stress of the respective first regions corresponds to 70 through 90% of a tensile stress of the respective second regions.

8. The wearing article according to claim 7 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

9. The wearing article according to claim 2 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

10. The wearing article according to claim 2 , wherein a tensile stress of the respective second regions is 15 through 50% higher than that of the respective third regions.

11. The wearing article according to claim 1 , wherein the liquid-absorbent structure includes a wrapping sheet adapted to wrap the core and front and rear flaps lying outboard of the core front and rear ends as viewed in the longitudinal direction and respectively defined by the wrapping sheet, wherein the first waist elastics are attached so as to overlap at least partially with the front and rear flaps.

12. The wearing article according to claim 11 , wherein a tensile stress of the respective first regions corresponds to 70 through 90% of a tensile stress of the respective second regions.

13. The wearing article according to claim 12 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

14. The wearing article according to claim 11 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus the front and rear waist regions are divided into the first regions, the second regions and the third regions, wherein a tensile stress of the respective third regions is adjusted to be lower than that of the second regions.

15. The wearing article according to claim 1 , wherein a tensile stress of the respective first regions corresponds to 70 through 90% of a tensile stress of the respective second regions.

16. The wearing article according to claim 15 , wherein the front and rear waist regions additionally include third regions lying adjacent to the side of the respective second regions closest to the crotch region and thus th

Assignees

• Kuwano Seiichi
• Hashino Yuki
• Masaki shunsuke
• Unicharm Corp

Inventors

• Kuwano Seiichi
• Hashino Yuki
• Masaki shunsuke

Classifications

• A61F13/496

  in the form of pants or briefs · CPC title

• A61F13/49009

  with elastic means · CPC title

• A61F13/49015

  the elastic means being elastic panels · CPC title

• A61F13/49011 Primary

  the elastic means is located at the waist region · CPC title

• A61F13/49061

  the diaper having one or two waist members forming the diaper waist region and an independent absorbent structure attached to the one or two waist members forming the crotch region · CPC title