... good acid, alkali, salt and other 80 kinds of acid and alkali chemical corrosion resistance performance,and also ... Low temperature brittlenessproperitiespasspass 1) Black geomembrane requirements3, the implementation of product standardsGB/T 17643-1998SL/T231-98 4, the ... railway, airport, building’s base water and all kinds of underground, underwater engineering leakproof-lined and as garbage dumps, ...