BIODEGRADABLE RESIN PRODUCT, RAW MATERIAL THEREFOR, AND PREPARATION THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain a resin product free of environmental pollutions and biodegradable into a grain- or powder-form through nibbling, microbe degradation, and oxidative decomposition by means of burying in the natural environment, by contg. a starch; a PE, PS or PVA, a crosslinking agent, and an accelerator each in a specified amt. SOLUTION: A material comprises 15-86 wt.% of a starch, 8-70 wt.% of a PE, PS or PVA, 4-12 wt.% of a crosslinking agent, pref. glycerol and/or sorbitol, and 2-3 wt.% of an accelerator, pref. at least one compd. selected from aluminum hydroxide, an oxidized wax, a vegetable oil, and stearic acid. A PE, PS or PVA each biodegradable, constitutes a source material for biodegradable resins or an exclusive material for biodegradable resins. As biodegradable resin products, are pref. agricultural sheets, packaging bags, food bags, shopping bags, waste bags, dust bags, seedling culture boxes, lunch goods, foamed plates, foamed fruit-protecting nets, and foamed cushioning materials.