Multi-ply battery separator and process of forming

Details Multi-ply battery separator and process of forming Multi-ply battery separator and process of forming

H - Electricity

01

M

H01M 2/14 (2006.01) C08J 9/26 (2006.01) C08J 9/28 (2006.01) H01M 2/16 (2006.01)

Patent

CA 2126316

A process of having a microporous multi-ply substantially unfilled sheet product which is capable of becoming non-porous at a predetermined elevated transformation temperature is formed by first forming a non-porous, multi-ply initial sheet product having at least one first ply and at least one second ply, each with its own viscosity profile. Porosity is then imparted to the initial sheet product, either by extracting extractable material contained within the first and second composition, or by stretching and annealing the initial sheet product.

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