功能

• It is a membrane that separates proteins, nucleic acids, polysaccharides, organic and inorganic colloidal particles, etc., in molecular size, consisting of an active layer and a sponge layer in which anisotropic polymers are cast into a porous film.
• Fast filtration rate and stable filtration against changes in pH and temperature.
• To prevent the film from drying, it is immersed in 20% ethyl alcohol aqueous solution.