Cold water soluble films and film forming compositions
AssigneeFMC Corporation
InventorsNagui I. Ibrahim, Richard M. Herbert
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Abstract
The rate of disintegration in cold water of water soluble packaging films is improved by incorporating into a film forming polymer composition, to form a dry blend or aqueous dispersion, a substantially water insoluble cellulose material prepared from alkali metal salts of carboxy(lower alkyl) cellulose or hydroxy(lower alkyl) cellulose. The increased disintegration is achieved without loss of film stability and, in some cases, the film stability is improved.
Claims21
A self-supporting packaging film comprising (a) at least one water soluble polymer, and (b), in an amount effective to improve disintegration of the film in cold water, a water insoluble cellulose material prepared from a cellulose starting material selected from alkali metal salts of a carboxy(lower alkyl) cellulose and hydroxy(lower alkyl) celluloses.
A composition of matter comprising (a) a water soluble film forming polymer, and (b) a substantially water insoluble alkali metal salt of carboxymethyl cellulose in an amount effective to improve disintegration in cold water of a film produced from the polymer.
A composition of matter comprising (a) a water soluble film forming polymer, and (b) a substantially water insoluble cellulose material prepared from a cellulose starting material selected from alkali metal salts of a carboxy(lower alkyl)cellulose and hydroxy(lower alkyl)celluloses, the amount of (b) being effective to improve disintegration in cold water of a film produced from the polymer.
Dependencies are inferred from the claim text.