申请人:Li, Xiaolu
公开号:EP1942137A1
公开(公告)日:2008-07-09
Disclosed herein is a water-soluble fully biodegradable material comprising a main material and a foaming agent, wherein the main material is a product formed by melting a mixture containing starch, polyol, and water-containing polyvinyl alcohol; and the polyvinyl alcohol is hydrophilic polyvinyl alcohol. The main material is a product formed from a molten mixture and has a melting temperature of 130-190 ° C which is much lower than its decomposition temperature of 250-400 ° C, therefore the water-soluble fully biodegradable material can achieve molten state, has thermoplastic processability incomparable to that of conventional simple physical mixture of polyvinyl alcohol, starch, and polyol, and can achieve real extrusion granulation and foam molding. The foam product prepared from the inventive material by foam molding has excellent foaming ratio, compression strength, resilience rate and dimension stability. The foam product can be dissolved in water so as to accelerate decomposition at waste treatment condition or ambient condition after disposal, and will not cause environment pollution.
本文公开了一种水溶性全生物降解材料,由主材料和发泡剂组成,其中主材料是通过熔化含有淀粉、多元醇和含水聚乙烯醇的混合物形成的产品;聚乙烯醇是亲水性聚乙烯醇。主材料是由熔融混合物形成的产品,其熔化温度为 130-190 °C,远低于其 250-400 °C的分解温度,因此水溶性全生物降解材料可以达到熔融状态,具有传统的聚乙烯醇、淀粉和多元醇简单物理混合物无法比拟的热塑性加工性,可以实现真正的挤压造粒和泡沫成型。本发明材料通过发泡成型制备的泡沫产品具有优异的发泡率、压缩强度、回弹率和尺寸稳定性。泡沫产品可溶解于水,从而在废物处理条件下或处置后的环境条件下加速分解,不会造成环境污染。