POROUS MEMBRANE AND METHOD OF ITS PRODUCTION Russian patent published in 2014 - IPC H01M2/16 C08B15/00 D04H1/425 

FIELD: process engineering.

SUBSTANCE: set of inventions relates to porous membrane, separator for electrochemical device including said porous membrane and said separator and to method of its production. porous membrane contains cellulose fibres wherein the latter are produced from the mix of over 50 wt % of initial material first cellulose fibres with surface area defined by staining with "congo red" dye and making 250 m²/g or more and 500 m²/g or less; and less than 50 wt % of second cellulose fibres with surface area defined by "congo red" staining and making 150 m²/g or more and less than 250 m²/g.

EFFECT: better properties, acceptable costs.

28 cl, 1 tbl, 8 ex