Absorbent article

• US 6,300,538 B1
• Filed: 11/20/1996
• Issued: 10/09/2001
• Est. Priority Date: 11/30/1995
• Status: Expired due to Term

• Current Assignee: SCA Hygiene Products AB (Essity AB)
• Original Assignee: SCA Hygiene Products AB (Essity AB)
• Inventors: Vastag, Eva, Lindquist, Bengt W.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): REICHLE, KARIN M
• Application Number:
  US08/754,261
• Time in Patent Office: 1,784 Days
• Field of Search: 604/369, 604/378-382, 604/385.1, 604/385.2, 604/386, 604/387, 604/372, 604/385.101, 604/385.17, 604/385.24, 604/385.25, 604/385.31
• US Class Current: 604/369
• CPC Class Codes: A61F 13/4752 the means being an upstanding barrier
• CPC Class Codes: A61F 13/4755 the means being a flat barrier on or inside the absorbent article, e.g. backsheet wrapped around the edges

Abstract

An absorbent article (10) such as a sanitary napkin, having an elongate absorbent core (12) delimited by an upper surface (14) and a lower surface (16), a pair of opposed longitudinal edge portions (18, 20) terminating in longitudinal edges (22, 24), and a pair of opposed transverse edges (26, 28). The core has a first end portion (30), a second end portion (32) and a mid portion (34) located between the end portions. The article further includes a liquid permeable topsheet (36) extending over the upper surface (14) and a liquid impermeable sheet (38) covering the longitudinal edge portions (18, 20) of the absorbent core (12). A strip of generally hydrophobic resilient material (40) is placed between the liquid impermeable sheet (38) and the absorbent core (12) along each longitudinal edge portion (18, 20) of the absorbent core in at least the mid portion (34) to thereby increase the flexure resistance of the article.

Claims

1. An absorbent article, comprising:

an elongate absorbent core delimited by an upper surface and a lower surface, a pair of opposed longitudinal edge portions terminating in longitudinal edges, and a pair of opposed transverse edges, said core having a first end portion, a second end portion and a mid portion located between said end portions;

a liquid permeable topsheet extending over said upper surface, and

a pair of liquid impermeable sheet, each of the liquid impermeable sheets covering a respective one of said longitudinal edge portions of said absorbent core to form a liquid retaining pocket along the respective one of said longitudinal edge portions, wherein a strip of substantially hydrophobic resilient material is arranged between each of said respective liquid impermeable sheets and said absorbent core along each longitudinal edge portion of said absorbent core in at least said mid portion of said absorbent core to thereby increase the flexure resistance of the article;

wherein each of the liquid impermeable sheets covers a portion of the upper surface of the absorbent core, a portion of the lower surface of the absorbent core, and at least a portion of the longitudinal edge of the respective longitudinal edge portion of the absorbent core.

2. The absorbent article as claimed in claim 1, wherein each of the strips of hydrophobic material is a three dimensional nonwoven fibrous plastic wadding.

3. The absorbent article as claimed in claim 1, wherein each of the strips of hydrophobic material is foamed plastic.

4. The absorbent article as claimed in claim 1, wherein each of the strips of resilient material is arranged between a respective one of said liquid impermeable sheets and said upper surface of said absorbent core.

5. The absorbent article as claimed in claim 1, wherein each of the strips of resilient material is arranged between a respective one of said liquid impermeable sheets and said lower surface of said absorbent core.

6. The absorbent article as claimed in claim 1, wherein the absorbent article further comprises a liquid impermeable backsheet extending over said lower surface of said absorbent core, said backsheet and said topsheet being joined to form a peripheral margin around said absorbent core.

7. The absorbent article as claimed in claim 6, wherein said pockets extend along an entire length of said absorbent core.

8. The absorbent article as claimed in claim 1, wherein said mid portion of said absorbent core comprises between 20% and 60% of a length of the absorbent core.

9. The absorbent article as claimed in claim 1, wherein each of said strips of resilient material has an extension transversely across said absorbent core, said extension being between 5% and 25% of the total width of the absorbent core.

10. The absorbent article as claimed in claim 1, wherein said mid portion of said absorbent core comprises between 30 and 45% of the absorbent core.

11. The absorbent article as claimed in claim 1, wherein said mid portion of said absorbent core comprises about one-third of a length of the absorbent core.

12. The absorbent article as claimed in claim 1, wherein each of the liquid impermeable sheets forms a C-fold around an exterior periphery of the respective longitudinal edge portion.