Title:
MULTILAYER POROUS MEMBRANE AND PROCESS
Document Type and Number:
Japanese Patent JP2012071607
Kind Code:
A
Abstract:
To provide a multilayer porous membrane formed of an extrudable polymer.
A multilayer microporous polymeric membrane includes at least two porous layers of a polymer material. The membrane has a lacy open pore, and the layers forms an integral porous bulk matrix. The polymer material of each layer is independently selected from a group consisting of polyethylene, ultrahigh molecular weight polyethylene (UHMW-PE); polypropylene; poly (tetrafluoroethylene-co-perfluoroalkylvinyl ether) where alkyl is propyl, methyl or mixtures thereof, (PFA); poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP); and mixtures thereof. At least two layers of the microporous polymeric membrane have different average pore size.
Inventors:
YEN LARRY
PATEL RAJNIKANT B
PATEL RAJNIKANT B
Application Number:
JP2011236072A
Publication Date:
April 12, 2012
Filing Date:
October 27, 2011
Export Citation:
Assignee:
ENTEGRIS INC
International Classes:
B32B5/18; B29C48/08; B29C48/21; B29C48/495; B32B27/30; B32B27/32; C08J9/12
Attorney, Agent or Firm:
Yoshio Kawaguchi
Chihiro Watanabe
Katsuma Osaki
Chihiro Watanabe
Katsuma Osaki