Disposable absorbent article

• US 5,851,204 A
• Filed: 11/12/1996
• Issued: 12/22/1998
• Est. Priority Date: 05/10/1994
• Status: Expired due to Term

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Mizutani, Satoshi
• Primary Examiner(s): Prebilic, Paul B.
• Assistant Examiner(s): CUDDIHY, FRANCIS KEVIN
• Application Number:
  US08/747,706
• Time in Patent Office: 770 Days
• Field of Search: 604/358, 604/370, 604/378, 604/385.1, 604/383, 604/385.2, 604/386, 604/387, 604/397, 604/398
• US Class Current: 604/385.04
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• 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
• CPC Class Codes: A61F 13/4757 the means being located outside the perimeter of the absorbent core A61F13/4752 takes precedence
• CPC Class Codes: A61F 13/49413 the edge leakage prevention means being an upstanding barrier
• CPC Class Codes: A61F 13/4942 the barrier not being integral with the top- or back-sheet
• CPC Class Codes: A61F 13/496 in the form of pants or briefs
• CPC Class Codes: A61F 13/515 characterised by the interconnection of the topsheet and the backsheet
• CPC Class Codes: A61F 2013/15406 Basis weight
• CPC Class Codes: A61F 2013/15447 Fibre dimension, e.g. denier or tex
• CPC Class Codes: A61F 2013/4537 with aeration ducts
• CPC Class Codes: A61F 2013/4562 cup-shaped
• CPC Class Codes: A61F 2013/4948 the edge leakage prevention means being elastic
• CPC Class Codes: A61F 2013/51061 for rendering the surface hydrophobic
• CPC Class Codes: A61F 2013/530167 being crimped

Abstract

A disposable absorbent article, such as a menstruation pad or diaper, is provided with a pair of side flaps extending along transversely opposite side edges of a liquid-absorbent core disposed between a liquid permeable topsheet and a liquid impermeable backsheet. Each longitudinally extending side flap is made from a soft, stretchable and liquid-resistant strip of sheet material. One of the transversely opposite sides of the strip is bonded to the topsheet while the other side is bonded to the backsheet.

Claims

1. A disposable sanitary napkin capable of placement within a garment, comprising:

a liquid-permeable topsheet;

a liquid-impermeable backsheet;

a liquid-absorbent core disposed between said topsheet and backsheet;

a pair of side flaps formed separate from the topsheet and backsheet and extending along transversely opposite side edges of said core, wherein the side flaps are attached to the topsheet and the backsheet; and

each of said side flaps comprising a longitudinally extending strip of soft, stretchable and liquid resistant sheet material bonded to an upper surface of said topsheet along a first side of said strip and which first side includes an intermediate portion and a free edge portion both of which portions extend inwardly from an associated side edge of the core to overlap the core when the napkin is in a flat position, each side flap including a folded portion formed outward from said side edge of said core and including a second side of said strip extending back inward from the folded portion into bonded attachment with said backsheet.

2. A disposable absorbent article according to claim 1, wherein bonding of said strips to the article is performed in a stretched condition of said strips along said side edges of said core.

3. A disposable absorbent article according to claim 1, wherein a second side flap is formed with a portion of each of said side flaps extending upward of said core to thereby define a pocket in cooperation with said topsheet.

4. A disposable absorbent article comprising:

a liquid-permeable topsheet;

a liquid-impermeable backsheet;

a liquid-absorbent core disposed between said topsheet and backsheet;

a pair of side flaps formed separate from the topsheet and backsheet and extending along transversely opposite side edges of said core, wherein the side flaps are attached to the topsheet and the backsheet; and

each of said side flaps comprising a longitudinally extending strip of soft, stretchable and liquid resistant sheet material bonded to an upper surface of said topsheet along a first side of said strip and which first side extends inwardly from an associated side edge of the core to overlap the core when the article is in a flat position, each side flap including a folded portion formed outward from said side edge of said core and including a second side of said strip extending back inward from the folded portion into bonded attachment with said backsheet, wherein mutually opposed inner surfaces of each said side flap extending outward from said core are bonded to each other along a longitudinal welding line, inward from an outer side edge of said side flap, to thereby define a tunnel communicating air therethrough between said welding line and said outer side edge.

5. A disposable sanitary napkin capable of placement within a garment, comprising:

a liquid-permeable topsheet;

a liquid-impermeable backsheet;

a liquid-absorbent core disposed between said topsheet and backsheet;

a pair of side flaps formed separate from the topsheet and backsheet and extending along transversely opposite side edges of said core when the napkin is in a flat position, wherein the side flaps are attached to the topsheet and the backsheet; and

each of said side flaps comprising a longitudinally extending strip of soft, stretchable and liquid resistant sheet material bonded to an upper surface of said topsheet along a first side of said strip and which first side includes an intermediate portion and a free edge portion both of which portions extend inwardly from an associated side edge of the core so that at least the free edge portion is structured to overlap the core when the napkin is in a flat position, each side flap including a folded portion formed outward from said side edge of said core and including a second side of said strip extending back inward from the folded portion into bonded attachment with said backsheet.