ABSORBENT ARTICLE AND METHOD FOR PRODUCING ABSORBENT ARTICLE

• US 20100198179A1
• Filed: 07/11/2008
• Published: 08/05/2010
• Est. Priority Date: 07/30/2007
• Status: Abandoned Application

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Tsukuda, Atsushi, Noda, Yuki, Kuroda, Kenichiro
• Application Number:
  US12/668,730
• Publication Number:
  US 20100198179A1
• Time in Patent Office: Days
• US Class Current: 604/365
• CPC Class Codes: A61F 13/15658 Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
• CPC Class Codes: A61F 13/536 having discontinuous areas of compression
• CPC Class Codes: A61F 2013/53051 being only in particular parts or specially arranged

Abstract

Occurrence of a protuberance due to swelling of superabsorbent resin is prevented in an absorbent article.

An absorbent article includes: a fluid-permeable surface sheet; a fluid-impermeable back face sheet; and a liquid-absorbent core that is between the surface sheet and the back face sheet and that includes hydrophilic fiber and superabsorbent resin, the liquid-absorbent core having a plurality of through holes formed thereon and high-density regions, the high-density regions being each provided at a position adjacent to each of the through holes, a density of the superabsorbent resin in each of the high-density regions being higher than in another region.

Claims

1. An absorbent article, comprising:

a fluid-permeable surface sheet;

a fluid-impermeable back face sheet; and

a liquid-absorbent core that is between the surface sheet and the back face sheet and that includes hydrophilic fiber and superabsorbent resin,

the liquid-absorbent core having a plurality of through holes formed thereon and high-density regions, the high-density regions being each provided at a position adjacent to each of the through holes, a density of the superabsorbent resin in each of the high-density regions being higher than in another region.

2. An absorbent article according to claim 1, wherein

the liquid-absorbent core is substantially rectangular, and

a plurality of the through holes are provided in both a longitudinal direction and a width direction of the liquid-absorbent core.

3. An absorbent article according to claim 1, wherein

the high-density region is adjacent to the through hole on at least either one of both sides of the through hole in the longitudinal direction of the liquid-absorbent core.

4. A method for producing an absorbent article, comprising:

a concave-section-forming step in which hydrophilic fiber is supplied to a mold having a projection section that projects from a bottom section and that is used to form a through hole extending in a front-back face direction, from a certain direction with respect to the mold, and in which a hollowed concave section is formed on an opposite side to a side of the projection section on which the hydrophilic fiber is supplied; and

a supplying step in which superabsorbent resin is supplied to the concave section.

5. A method for producing an absorbent article, according to claim 4, wherein

the mold is recessed on an outer circumferential face of a drum that rotates, and

the hydrophilic fiber is supplied from above the drum to the mold whose orientation changes with rotation of the drum.

6. A method for producing an absorbent article, according to claim 5, wherein

after the concave-section-forming step, the mold is moved by rotation of the drum to a position at which the superabsorbent resin can be supplied to the concave section from above.