Patent ID: 8911844
Filing Date: 2014-12-16
Classification: A61F,A61L,B29C,B29K,C08F,C08J,Y10T

Abstract:
1. A porous material having a microstructure of nodes interconnected by fibrils comprising an expanded core-shell tetrafluoroethylene (TFE) copolymer, said copolymer comprising: (a) a first, core portion comprising a polymer chain of TFE monomers and at least one comonomer; and (b) a second, shell portion consisting of a polymer chain consisting of TFE monomers, wherein said expandable core-shell tetrafluoroethylene copolymer comprises at least 3.0% by weight polymerized units of said at least one comonomer based on total weight of said copolymer, wherein said copolymer comprises a first melt transition temperature and a second melt transition temperature, and wherein said copolymer exhibits adhesion.