| 摘要 |
PURPOSE:To provide a film easily soluble in cold water, producible with little troubles and capable of keeping the solubility in cold water even by contacting with an alkaline substance or acidic substance over a long period. CONSTITUTION:The objective film easily soluble in cold water is composed of a saponified copolymer of a vinyl ester and diacetone acrylamide, containing the vinyl ester and the diacetone acrylamide as constituent units in amounts of 70-99mol% and 130mol%, respectively, and having a saponification degree of >=50mol%. |
