Absorbent article with free edge portions

• US 6,326,525 B1
• Filed: 04/21/1998
• Issued: 12/04/2001
• Est. Priority Date: 05/29/1997
• Status: Expired due to Term

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Noguchi, Jinko, Tanaka, Satoshi, Tanaka, Masahito, Hamajima, Mitsugu, Kameo, Yoji, Nakanishi, Minoru, Yokomatsu, Hiroyuki
• Primary Examiner(s): RUHL, DENNIS WILLIAM
• Application Number:
  US09/063,051
• Time in Patent Office: 1,323 Days
• Field of Search: 604/385.2, 604/387, 604/385.1, 604/378, 604/385.01, 604/385.24
• US Class Current: 604/378
• CPC Class Codes: A61F 13/4752 the means being an upstanding barrier
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• CPC Class Codes: A61F 13/4756 the means consisting of grooves, e.g. channels, depressions or embossments, resulting in a heterogeneous surface level
• CPC Class Codes: A61F 13/4758 the means preventing fluid flow in a longitudinal direction

Abstract

The present invention provides an absorbent article 1 having a substantially elongate configuration, comprising a liquid-impermeable leakage-preventive layer 3, and a liquid-retentive absorbent layer 2 disposed above the leakage-preventive layer 3, wherein the absorbent layer 2 comprises a liquid-retentive absorbent member 24 and a liquid-permeable topsheet 23, and is formed by a fixed portion 21 and one pair of left and right free edge portions 22, the fixed portion 21 being fixed to the leakage-preventive layer 3, the free edge portions 22 being located on opposite left and right sides in the longitudinal direction of the fixed portion 21 and each having a free end 22a, the absorbent member 24 being present in both of the fixed portion 21 and the pair of left and right free edge portions 22.

Claims

1. An absorbent article having a substantially elongate configuration, comprising a liquid-impermeable leakage-preventive layer, and a liquid-retentive absorbent layer disposed above said leakage-preventive layer,

wherein said absorbent layer comprises a liquid-retentive absorbent member and a liquid-permeable topsheet, said absorbent layer defining a fixed portion and a pair of left and right free edge portions, said fixed portion being fixed to said leakage-preventive layer, said free edge portions being located on opposite left and right sides in the longitudinal direction of said fixed portion and being free from attachment with said leakage-preventive layer to form a free end, said absorbent member being present in both of said fixed portion and said pair of left and right free edge portions, and said free edge portions each having an elastic member arranged over a predetermined length along a longitudinal direction of said absorbent layer, said free edge portions being erected upwardly by contraction of said elastic members.

2. An absorbent article according to claim 1, wherein said topsheet is arranged in such a manner as to cover at least a skin contacting surface side of said absorbent member, said fixed portion is located on a widthwise central portion of said absorbent layer, and said free edge portions are continuously formed with opposite left and right side edges of said fixed portion, respectively.

3. An absorbent article according to claim 1, wherein a skin non-contacting surface of said absorbent article is provided with slip-preventive means for attaching said absorbent article to an undergarment when in use, and a portion of said absorbent article fixed by said slip-preventive means is larger in width than said fixed portion of said absorbent layer.

4. An absorbent article according to claim 1, wherein groove portions are each formed in opposite left and right side portions of said fixed portion.

5. An absorbent article according to claim 1, wherein said fixed portion and said free edge portions are separately formed, and said free edge portions are firmly secured at base end portions and/or intermediate portions thereof to opposite left and right side portions of said fixed portion.

6. An absorbent article according to claim 1, wherein said absorbent layer includes a rear free edge portion which is not fixed to said leakage-preventive layer, at least said rear free edge portion has an elastic member arranged over a predetermined length along a longitudinal direction of said absorbent layer, said rear free edge portions being erected upwardly by contraction of said elastic member.

7. The absorbent article according to claim 1, wherein said leakage-preventive layer includes a leakage-preventive sheet, a liquid permeable sheet, and an absorptive sheet located between the leakage-preventive sheet and the liquid permeable sheet.

8. The absorbent article according to claim 1, wherein said topsheet is a single continuous sheet extending at least from one of said free ends, through said fixed portion to the other of said free ends.

9. The absorbent article according to claim 1, wherein said absorbent member is a single member extending into said pair of left and right free edge portions from said fixed portion.

10. An absorbent article having a substantially elongate configuration, comprising a liquid-impermeable leakage-preventive layer, and a liquid retentive absorbent layer disposed above said leakage-preventive layer, said absorbent article being attached to an undergarment when in use,

wherein said absorbent layer comprises a liquid-retentive absorbent member and a liquid-permeable topsheet, said absorbent layer defining a fixed portion and a pair of left and right free edge portions, said fixed portion being fixed to said leakage-preventive layer, said free edge portions being located on opposite left and right sides in the longitudinal direction of said fixed portion and being free from attachment with said leakage-preventive layer to form a free end, said absorbent member being present in both of said fixed portion and said pair of left and right free edge portions, and said free edge portions each having an elastic member arranged over a predetermined length along a longitudinal direction of said absorbent layer, said free edge portions being erected upwardly by contraction of said elastic members.

11. An absorbent article according to claim 10, wherein said topsheet is arranged in such a manner as to cover at least a skin contacting surface side of said absorbent member, said fixed portion is located on a widthwise central portion of said absorbent layer, and said free edge portions are continuously formed with opposite left and right side edges of said fixed portion, respectively.

12. An absorbent article according to claim 10, wherein a skin non-contacting surface of said absorbent article is provided with slip-preventive means for attaching said absorbent article to an undergarment when in use, and a portion of said absorbent article fixed by said slip-preventive means is larger in width than said fixed portion of said absorbent layer.

13. An absorbent article according to claim 10, wherein groove portions are each formed in opposite left and right side portions of said fixed portion.

14. An absorbent article according to claim 10, wherein said fixed portion and said free edge portions are separately formed, and said free edge portions are firmly secured at base end portions and/or intermediate portions thereof to opposite left and right side portions of said fixed portion.

15. An absorbent article according to claim 10, wherein said absorbent layer includes a rear free edge portion which is not fixed to said leakage-preventive layer, at least said rear free edge portion has an elastic member arranged over a predetermined length along a longitudinal direction of said absorbent layer, said rear free edge portion being erected upwardly by contraction of said elastic member.

16. The absorbent article according to claim 10, wherein said leakage-preventive layer includes a leakage-preventive sheet, a liquid permeable sheet, and an absorptive sheet located between the leakage-preventive sheet and the liquid permeable sheet.

17. The absorbent article according to claim 10, wherein said topsheet is a single continuous sheet extending at least from one of said free ends, through said fixed portion to the other of said free ends.

18. The absorbent article according to claim 10, wherein said absorbent member is a single member extending into said pair of left and right free edge portions from said fixed portion.