Pants-type absorbent wearing article with buttocks covering portion

Patent metadata

Field	Value
Publication number	US-9375359-B2
Application number	US-201113704907-A
Country	US
Kind code	B2
Filing date	Jun 27, 2011
Priority date	Jul 1, 2010
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A pants-type wearing article that provides effective buttocks covering having a front panel, a rear panel and a crotch panel connected to the front panel and the rear panel so as to cover a crotch region of the article wearer. The rear panel is formed with a rear waist covering portion having a dimension in the longitudinal direction substantially the same as a dimension of the front panel and a buttocks covering portion contiguously extending downward from the rear waist covering portion and adapted to cover at least partially the wearer's buttocks. The buttocks covering portion has buttock elastics extending in the transverse direction. The buttocks covering portion and the crotch panel are joined to each other in a zone defined between the gasket cuffs opposite to each other in the transverse direction and not joined to each other at portions in which the gasket cuffs are disposed.

First claim

The invention claimed is:

1. A pants-type absorbent wearing article having a longitudinal direction, a transverse direction and a front-back direction, comprising:
a front panel adapted to cover a front waist region of a wearer and having a dimension in the longitudinal direction extending between inner and outer ends of the front panel;
a rear panel adapted to cover a rear waist region of the wearer; and
a crotch panel including an absorbent structure and being connected to the front panel and the rear panel so as to cover a crotch region of the wearer, wherein
the rear panel is formed with a rear waist covering portion and a buttocks covering portion contiguously extending downward from the rear waist covering portion and adapted to cover at least partially a wearer's buttocks, wherein:
the rear waist covering portion has a dimension in the longitudinal direction that extends from the rear outer end of the rear panel to a transverse boundary line between the rear waist covering portion and the buttocks covering portion and the buttocks covering portion has a dimension in the longitudinal direction that extends from the transverse boundary line to the rear inner end of the rear panel;
the dimension of the rear waist covering portion in the longitudinal direction is substantially the same as the dimension of the front panel;
the absorbent structure includes an absorbent core extending in the longitudinal direction and gasket cuffs extending in the longitudinal direction along lateral portions of the absorbent structure and provided with gasket elastics adapted to be elastically contractible in the longitudinal direction; and
the buttocks covering portion is provided with buttock elastics extending in the transverse direction, wherein
the rear waist covering portion and the buttocks covering portion of the rear panel overlap with the absorbent core and the gasket cuffs of the absorbent structure,
the rear waist covering portion is joined to the absorbent core and the gasket cuffs,
the buttocks covering portion is joined to the absorbent core, and
the buttocks covering portion is not joined to the gasket cuffs at a region where the buttocks covering portion and the gasket cuffs overlap with each other.

2. The pants-type absorbent wearing article according to claim 1 , wherein:
the rear waist covering portion is provided with rear waist elastics adapted to be elastically contractible in the transverse direction;
the crotch panel and the rear panel are joined to each other at a zone in which the gasket elastics and the rear waist elastics intersect with each other;
the front panel is provided with front waist elastics adapted to be elastically contractible in the transverse direction; and
the crotch panel and the front panel are joined to each other at a zone in which the gasket elastics and the front waist elastics intersect with one another.

3. The pants-type absorbent wearing article according to claim 1 , wherein the buttock elastics are secured under no tension to the rear panel.

4. The pants-type absorbent wearing article according to claim 1 , wherein the buttock elastics are secured under no tension to the rear panel at least at a portion in which the buttocks covering portion and the absorbent structure overlap with each other.

5. The pants-type absorbent wearing article according to claim 2 , wherein:
both the buttock elastics and the rear waist elastics comprise a plurality of elastic threads elongated in the transverse direction under tension, and
an elongation ratio of the buttock elastics is smaller than that of the rear waist elastics.

6. The pants-type absorbent wearing article according to claim 2 , wherein:
both the buttock elastics and the rear waist elastics comprise a plurality of elastic threads elongated in the transverse direction under tension, and
an elongation ratio of the buttock elastics is equal to that of the rear waist elastics; and
intervals in the longitudinal direction of the buttock elastics are larger than intervals in the longitudinal direction of the rear waist elastics.

7. The pants-type absorbent wearing article according to claim 2 , wherein the rear waist elastics are contractible in the transverse direction in the lateral edges of the absorbent structure.

8. The pants-type absorbent wearing article according to claim 7 , wherein a range in which the rear waist elastics are contractible in the lateral edges of the absorbent structure is 5 to 20% of the dimension in the transverse direction of the absorbent structure.

9. The pants-type absorbent wearing article according to claim 2 , wherein,
both the buttock elastics and the rear waist elastics comprise a plurality of elastic threads elongated in the transverse direction under tension, and
an elongation ratio of the buttock elastics is smaller than that of the rear waist elastics.

10. The pants-type absorbent wearing article according to claim 2 , wherein:
both the buttock elastics and the rear waist elastics comprise a plurality of elastic threads elongated in the transverse direction under tension,
an elongation ratio of the buttock elastics is equal to that of the rear waist elastics; and
intervals in the longitudinal direction of the buttock elastics are greater than intervals in the longitudinal direction of the rear waist elastics.

Assignees

• Hashino Yuki
• Masaki shunsuke
• Unicharm Corp

Inventors

• Hashino Yuki
• Masaki shunsuke

Classifications

• A61F13/496

  in the form of pants or briefs · CPC title

• A61F13/476 Primary

  characterised by encircling the crotch region of the undergarment, e.g. with flaps · CPC title

• A61F13/515

  characterised by the interconnection of the topsheet and the backsheet · CPC title

• A61F13/49011 Primary

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

• A61F13/49466

  the edge leakage prevention means being at the waist region · CPC title