Patent ID: 8221896
Filing Date: 2012-07-17
Classification: B29B,B29C,B29K,C09K,Y10T

Abstract:
1. A cellulose resin film, comprising: a support; and an A/B/A three-layer sheet which is formed on the support, the A/B/A three-layer sheet being made of two cellulose resins A and B, wherein the resin A, which forms a pair of outer layers of the A/B/A three-layer sheet, has a number average molecular weight smaller than that of the resin B, which forms the inner layer of the A/B/A three-layer sheet, and the resin A has a number average molecular weight of 20,000 or more and 50,000 or less, and the resin B has a number average molecular weight of 30,000 or more and 100,000 or less, wherein a substitution degree satisfying the following expressions: 2.0≦X+Y≦3.0, 0≦X≦2.0 and 1.2≦Y≦2.9 where X represents a substitution degree of an acetate group and Y represents sum of substitution degree of the substitution degrees of propionate group, butyrate group, pentanoyl group and hexanoyl group.