H - Electricity – 01 – M
Patent
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.
Giovannoni Richard Thomas
Guo Yihong
Rein Burton Maxwell
Spotnitz Robert Mark
Troffkin Howard Julian
Celgard Inc.
Osler Hoskin & Harcourt Llp
W.r. Grace & Co.,-Conn.
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