Patent ID: 9441088
Filing Date: 2016-09-13
CPC Classification: B01D,B29C,B29K,B29L,C08F,C08J,C08K,D01F,H01L

Claim Text:
1. A process for making a vinylidene fluoride (VDF) copolymer article comprising: lubricating a VDF copolymer having a weight average molecular weight of at least about 1,000,000 g/mol and about 50 mol % to about 85 mol % VDF monomer to form a lubricated VDF copolymer; subjecting said lubricated VDF copolymer to pressure at a temperature below the melt temperature of said VDF copolymer to form a preform; and expanding said preform at a temperature below the melt temperature of said VDF copolymer to form a porous article having a structure of nodes interconnected by fibrils.