Nylon Membrane is a kind of film which is made of synthetic long chains polyamide . It has strong ability of combination to the nucleic acid and protein. It can be used to filter all aqueous and the majority of solvent solutions due to their wide chemical compatibility range and naturally hydrophilic characteristics. Its heat resistance is good, it can withstand to disinfect under the hot pressing of 120°C saturated steam for 30 minutes, and the highest operating temperature is 60°C. What’s more, it has favourable chemistry stability , can tolerate many kinds of organic and inorganic compounds, for example, diluted acid, diluted alkaline, alcohol, ester, oil, hydrocarbon compounds, halohydrocarbon and organic oxygenate.