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。