| abstract |
(57) [Summary] [Object] The present invention provides a biodegradable foam having a low density, a high elastic modulus, a high compressive strength, a low price, and an excellent industrial productivity with a polysaccharide and / or a polysaccharide. An object of the present invention is to provide a substitute product of a packaging material such as expanded polystyrene, which is produced by heat-foaming a material containing a derivative by extrusion molding and has a bad influence on environmental protection. [Structure] The present invention comprises 100 parts of a material containing a polysaccharide and / or a polysaccharide derivative as main components in the presence of 5 to 45 parts of water and 0.01 to 20 parts of a heating gas generating type water-insoluble bubble control agent. A method for producing a biodegradable foam excellent in low density, high elastic modulus and compressive strength, which is characterized in that it is heated and foamed by extrusion molding. |