The urethane foams is a kind of high molecular synthetic material and can be used widely. But being burned, it can get out the poisonous gas and results in some accidents with heavy losses of lives.
聚氨酯泡沫塑料是一种高分子合成材料，应用范围十分广泛，但聚氨酯泡沫塑料在火灾时能放出使人窒息死亡的毒气，特别是近年来已在一些场所造成重大的人员伤亡事故。
Any type of solid or semi solid organic material of natural or synthetic origin, generally of high molecular weight with no defined melting point. Most resins are polymers.
一类固体或半固体的天然的或合成的有机材料，一般为无清晰熔点的高分子量材料，多数树脂为聚合物。
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