FIELD: chemistry.
SUBSTANCE: invention relates to porous membrane, which contains cellulose fibres, where area of redispersed cellulose fibre surface, determined by colouring with "Congo red" dye, after redispersion of cellulose fibres of porous membrane in accordance with method of redispersion of normal paper redispersion by JIS P 8120, constitutes from 100 to 300 m2/g. Porous membrane in accordance with invention can be used as separator for electrochemical device.
EFFECT: obtaining sheet material, used in separator and electrochemical device, which has good characteristics of porosity, strength, volume resistance and reasonable cost.
22 cl, 1 tbl, 8 ex
