One pass process for forming electrode backing sheet.

摘要

A one-pass process for forming a porous uniaxially-oriented polytetrafluoroethylene sheet which is coherent and suitable for utilization as an electrode backing (wetproofing) sheet or layer uses particulate PTFE blended in an organic liquid medium to form a dispersion, to which a pore-forming agent is then added. After mixing, the organic liquid is removed and the dry mixture is fibrillated, chopped and formed into a sheet by passing it once through heated rollers.