Biodegradable foamed plastic material having a bulk density comprised within the range of from 5 to 13 kg/m³, comprising:
-- 30-99.5 by weight of polisaccharide containing more than 50% of thermoplastic starch or starch complexed by polimeric structures, having an intrinsic viscosity (in DMSO) lower than 1.3 dl/g and less than 20% by weight of soluble fraction in ethanol;
-- 0.5-70% by weight of a thermoplastic polymer which is soluble in starch, or is capable of complexing it;
-- 0-20% by weight of water.
The material can be used as a loose filler or for other foamed articles.
生物可降解发泡塑料材料,其体积密度在 5 至 13 kg/m³ 之间,包括
-- 30-99.5 重量百分比的
多糖,其中含有 50%以上的热塑性淀粉或由多聚体结构络合的淀粉, 其内在粘度(在
二甲基亚砜中)低于 1.3 分升/克,在
乙醇中可溶部分的重量百分比低于 20%;
-- 0.5-70% (按重量计)的热塑性聚合物,可溶于淀粉或能与淀粉络合;
-- 0-20% (重量百分比)的
水。
该材料可用作松散填料或其他发泡物品。