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US 5,217,803 AGranted
Disposable absorbent articles with biodegradable backsheets
AssigneeTredegar Industries, Inc.
InventorsRobert K. McBride, James M. Adams, Peter I. Chang, Carl D. Ray
Life of this patent
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Abstract
Liquid impervious, biodegradable films are disclosed. In particular, the films comprise a blend of an interpenetrated network of destucturized starch with ethylene/acrylic acid copolymers or ethylene/vinyl alcohol copolymers, and an aliphatic polyester such as polycaprolactone. Diapers, sanitary napkins, pantiliners, and the like, containing backsheets prepared from the foregoing materials are also disclosed.
Claims15
An absorbent article comprising:
- a) a liquid previous topsheet;
- b) a biodegradable liquid impervious backsheet joined with said topsheet;
- said backsheet comprising a blend of:
- (i) a biodegradable interpenetrated network of destructurized starch and a copolymer selected from the group consisting of ethylene acrylic acid copolymer and ethylene vinyl alcohol copolymer;
- and
- (ii) a biodegradable aliphatic polyester, the weight ratio of said interpenetrated network of destructurized starch and copolymer to said aliphatic polyester being greater than 1;1;
- and
- c) an absorbent core positioned between said topsheet and said backsheet.
5 more elements
Dependencies are inferred from the claim text.