FIELD: chemistry.
SUBSTANCE: method of producing membranes involves the following steps: mixing molten polyethylene and a membrane-forming solvent, extrusion of the obtained melt and cooling the extrudate with formation of a gel form, biaxial stretching at crystallisation temperature ranging from crystallisation temperature of the polyethylene dispersion to melting point of polyethylene +10°C, removing the solvent, repeated stretching of the membrane in the transverse direction at temperature 100-120°C.
EFFECT: obtaining microporous polyolefin membranes having excellent compression strength.
4 cl, 1 tbl, 7 ex
