| 摘要 |
PURPOSE:To provide the subject composition for packaging material, etc., composed of graft copolymer of a thermoplastic resin and a polysaccharide originated from cellulose, vegetable gum, algae, etc., stable over a long period without lowering the film-strength such as tensile strength even after shrinkage with moisture and applicable even to a hot object. CONSTITUTION:The objective composition shrinkable by moisture absorption from air in a hot atmosphere at <=50 deg.C and a relative humidity of >=75% can be produced by the graft-copolymerization of (A) a polysaccharide (e.g. sodium alginate) comprising animal polysaccharide, microbial polysaccharide or vegetable mucin of cellulose, vegetable gum, algae or heteroglycan origin and (B) a thermoplastic resin (e.g. acrylic ester elastomer) at a weight ratio of preferably (85:15) to (15:85). |
