Absorbent article and method for producing the same

Patent metadata

Field	Value
Publication number	US-9439817-B2
Application number	US-201214130172-A
Country	US
Kind code	B2
Filing date	Jun 7, 2012
Priority date	Jul 29, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A water-disintegrable absorbent article adapted to be easily peeled off the wearer's undergarment after use. A pantiliner has a topsheet lying on a body side of the wearer, a backsheet and a liquid-absorbent body interposed between the top- and backsheets. The backsheet may be formed of a water-disintegrable fibrous nonwoven fabric of which the component fibers have an orientation extending in a longitudinal direction. On a non-body side, first adhesive regions adapted to be attached to the wearer's undergarment and second adhesive regions allocated on both outer sides in a transverse direction of the first adhesive regions so as to be spaced in the transverse direction from the first adhesive regions. The first adhesive regions include front first adhesive regions, rear first adhesive regions and central first adhesive regions allocated between the front and rear first adhesive regions spaced apart from each other in the longitudinal direction. The second adhesive regions include front second adhesive regions and rear second adhesive regions spaced apart from each other in the longitudinal direction. The central first adhesive regions are allocated in a space area defined by the front and rear second adhesive regions and arranged in the transverse direction.

First claim

The invention claimed is:

1. An absorbent article having a longitudinal direction and a transverse direction, and including:
a body-side;
a non-body-side opposite to the body-side;
a water-disintegrable topsheet lying on the body-side;
a water-disintegrable backsheet lying on the non-body-side;
a water-disintegrable absorbent body interposed between these top- and backsheets; and
adhesive regions formed on the non-body-side of the backsheet and through which the backsheet is attachable to a wearer's undergarment, wherein:
the backsheet is formed of a fibrous nonwoven fabric of which component fibers have an orientation extending in the longitudinal direction and a fiber length,
the adhesive regions include first adhesive regions extending in the longitudinal direction and second adhesive regions allocated on both outer sides in the transverse direction of the first adhesive regions so as to be spaced apart from the first adhesive regions in the transverse direction and at least part of the first adhesive regions is allocated in a space area defined in the longitudinal direction between the second adhesive regions, and
a space dimension in the transverse direction between the first and second adhesive regions is shorter than the fiber length of the component fibers in the fibrous nonwoven fabric of the backsheet.

2. The absorbent article according to claim 1 , wherein respective length dimensions in the longitudinal direction of the first and second adhesive regions are longer than the fiber length of component fibers in the fibrous nonwoven fabric of the backsheet.

3. The absorbent article according to claim 2 , wherein the second adhesive regions have front second adhesive regions and rear second adhesive regions.

4. The absorbent article according to claim 2 , wherein a width dimension in the transverse direction of the first and second adhesive regions is in a range of 2.0 to 15.0 mm.

5. The absorbent article according to claim 2 , wherein the first adhesive regions include front first adhesive regions, rear first adhesive regions and central first adhesive regions allocated between the front and rear first adhesive regions.

6. The absorbent article according to claim 5 , wherein the second adhesive regions have front second adhesive regions and rear second adhesive regions.

7. The absorbent article according to claim 5 , wherein a width dimension in the transverse direction of the first and second adhesive regions is in a range of 2.0 to 15.0 mm.

8. The absorbent article according to claim 1 , wherein the first adhesive regions include front first adhesive regions, rear first adhesive regions and central first adhesive regions allocated between the front and rear first adhesive regions.

9. The absorbent article according to claim 8 , wherein the second adhesive regions have front second adhesive regions and rear second adhesive regions.

10. The absorbent article according to claim 8 , wherein a width dimension in the transverse direction of the first and second adhesive regions is in a range of 2.0 to 15.0 mm.

11. The absorbent article according to claim 1 , wherein the second adhesive regions have front second adhesive regions and rear second adhesive regions.

12. The absorbent article according to claim 11 , wherein a width dimension in the transverse direction of the first and second adhesive regions is in a range of 2.0 to 15.0 mm.

13. The absorbent article according to claim 1 , wherein a width dimension in the transverse direction of the first and second adhesive regions is in a range of 2.0 to 15.0 mm.

14. The absorbent article according to claim 1 , wherein a space dimension in the longitudinal direction between the first and second adhesive regions is longer than the fiber length of component fibers in the fibrous nonwoven fabric of the backsheet.

15. The absorbent article according to claim 1 , wherein a length dimension in the longitudinal direction of the second adhesive regions is longer than a length dimension in the longitudinal dimension of the first adhesive regions.

16. The absorbent article according to claim 1 , wherein non-adhesive regions are formed on the outer sides in the longitudinal direction of the first adhesive regions.

17. The absorbent article according to claim 1 , wherein a liquid-impermeable leakage-barrier sheet is interposed between the absorbent body and the backsheet and at least one of the first and second adhesive regions extends beyond both lateral side edges of the leakage-barrier sheet in the lateral direction.

Assignees

• Nishimura Kiyoko
• Tanio Toshiyuki
• Matsushima Azusa
• Unicharm Corp

Inventors

• Nishimura Kiyoko
• Tanio Toshiyuki
• Matsushima Azusa

Classifications

• A61F13/5611 Primary

  using fastening strips, e.g. adhesive, on the undergarment-facing side · CPC title

• A61F13/15211

  soluble or disintegratable in liquid · CPC title

• Y10T156/1052

  with cutting, punching, tearing or severing · CPC title

• A61F13/15699

  Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs · CPC title