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1. 发明授权

US5116550A Method of making biodegradable free fill foam packing material 失效
标题翻译：制造可生物降解的自由填充泡沫包装材料的方法
公开(公告)号：US5116550A
公开(公告)日：1992-05-26
申请号：US499647
申请日：1990-03-27
申请人： Newton B. Perkins
发明人： Newton B. Perkins
IPC分类号： B29B9/06 , B29B9/16 , B29C44/02 , B29C67/24
CPC分类号： B29C67/24 , B29B9/16 , B29C44/3402 , B29K2003/00 , B29K2075/00
摘要： Biodegradable free fill expanded polyurethane foam packing materials are formed by pumping liquid starch or sugar, diisocyanate, polyols and a catalyst into a mixing head. The mixture is released from an exit port in the mixing chamber as a sticky material. At predetermied intervals air blasts chop the sticky material mass from the exit port. The material beings expanding as it drops through a curing chamber against upward warm air currents. When the materials expand to full size and dry to a non-tacky surface, the materials are released from the chamber and collected for use as packing materials. The materials have a bionutrient starch or sugar content of about 40% or more, making them readily biodegradable by microbes. The polyurethane components are broken down into very small sizes and convert to urea, making the products highly suitable for disposal in landfills and as soil amendment and fertilizers.
摘要翻译：通过将液体淀粉或糖，二异氰酸酯，多元醇和催化剂泵送到混合头中来形成可生物降解的自由填充发泡聚氨酯泡沫包装材料。混合物作为粘性材料从混合室中的出口释放。在预先设定的时间间隔，空气从出口处切断粘性物料。材料随着固化室下降而向上膨胀，以抵抗向上的暖气流。当材料膨胀到全尺寸并干燥到非粘性表面时，材料从室中释放并收集用作包装材料。这些材料具有约40％或更多的生物淀粉或糖含量，使其易于由微生物降解。聚氨酯组件分解成非常小的尺寸并转化为尿素，使产品非常适合在垃圾填埋场以及土壤修复和肥料中处理。

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