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聚氨酯的全称为聚氨基甲酸酯,常用PU表示。聚氨酸泡沫塑料分为软质和硬质两种类型。软质具有热塑性;硬质无热塑性,具有优良的隔热性能和良好的耐化学腐蚀性能,并有绝缘、耐油、隔音、防震和比重轻等特点,是一种新型的工业合成材料。国内聚氨酯硬质泡沫塑料大部分用于隔热保温方面,少量的用于军工及航空部门。1.石油化工部门、大庆油田主要用于原油集输管线,自1966年至1975年曾分别用模塑、模注和
The full name of polyurethane is polyurethane, commonly used as PU. Polyurethane foam is divided into two types, soft and hard. Soft is thermoplastic; hard non-thermoplastic, has excellent thermal insulation properties and good chemical resistance, and has the characteristics of insulation, oil resistance, sound insulation, shock resistance and light weight. It is a new type of industrial synthetic material. Most of the polyurethane rigid foam in China is used for heat insulation, and a small amount for the military and aviation sectors. 1. The petrochemical and Daqing oil fields are mainly used for crude oil gathering and transmission pipelines. They were used for molding, molding and injection respectively from 1966 to 1975.