国外自八十年代以来,对改变水的灭火性能进行了大量的试验研究,特别是美国首先推出A类泡沫,因为A类泡沫具有高效能扑灭A类火的能力,同时又能扑灭B类火,所以它被广泛用来扑灭森林火灾和建筑物火灾。国外有称A类泡沫是新世纪的主要灭火剂,是灭火剂发展的新潮流。我国灭A类火大量 Abroad Since the 1980s, a great deal of experimental research has been conducted on changing the fire extinguishing performance of water. In particular, the United States first introduced Class A foam because Class A foam has the ability of extinguishing Class A fire with high efficiency and can extinguish Class B fire , So it is widely used to extinguish forest fires and building fires. Abroad, said Class A foam is the main agent of the new century, is the new trend of development of fire extinguishing agent. A large number of fire out of our country