Composition for absorbent film and method of preparation
AssigneeGrain Processing Corporation
InventorsLee C. Pedersen, Lyle F. Elmquist
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Abstract
An absorbent composition comprising the reaction product at elevated temperature and pressure of hydrolyzed starch polyacrylonitrile graft copolymer and a polyhydric alcohol such as glycerol in the amount of between about 3% and 20%. The resulting composition exhibits good fluid absorbency and fast wicking properties and is particularly useful in producing absorbent laminated film for use in diapers, paper towels and the like. The present invention also relates to an improved absorbent laminated film prepared with the above absorbent composition and a method for preparing such absorbent laminated film.
Claims20
An absorbent film comprising at least one backing layer and an absorbent composition secured to said backing layer including the reaction product of hydrolyzed starch polyacrylonitrile graft copolymer and a polyhydric alcohol in which, based upon the total weight of the composition, said hydrolyzed starch polyacrylonitrile graft copolymer is present in an amount of about 80% to 97% by weight and said polyhydric alcohol is present in an amount of about 20% to 3% by weight.
A method of preparing an absorbent film comprising applying an absorbent composition to a backing layer in which said absorbent composition includes a mixture of hydrolyzed starch polyacrylonitrile graft copolymer and a polyhydric alcohol in which, based upon the total weight of the composition, said hydrolyzed starch polyacrylonitrile graft polymer is present in an amount of about 80% to 97% by weight and said polyhydric alcohol is present in an amount of about 20% to 3% by weight and exposing said backing layer and said absorbent composition to a temperature and pressure sufficient to bond the same together.
Dependencies are inferred from the claim text.