... retention rate, good temperature resistance, strong acid, alkali, organic impregnant oxidant and aging resistance, inadhesion, incombustibility, nontoxic, biocompatibility ... with acid and alkali, but also can be used in the organic impredant, such as alcohols, hydrocarbon compound, lipid, ... the domestic nylon6. It can be used in almost all kinds of organic impregant and water solution, strong acid, ...