METHOD OF FORMING MICROPOROUS MEMBRANES

摘要

A method of forming a microporous fluoropolymer membrane comprising the steps of: irradiating a sheet of fluoropolymer at a dosage level below the rupture energy of the carbon-to-fluorine (C-F) bonds of the fluoropolymer, but sufficient to rupture carbon-to-carbon (C-C) bonds; and exposing the sheet of fluoropolymer to an etching for a period of time sufficient to etch away disrupted atoms and molecules, wherein continuous microphages are formed through the sheet.