Title:
POLYTETRAFLUOROETHYLENE POROUS MEMBRANE WITH SMALL ELONGATION ANISOTROPY AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/158428
Kind Code:
A1
Abstract:
Provided is a polytetrafluoroethylene (PTFE) porous membrane. In the tensile test wherein an arbitrary in-plane direction of the membrane is taken as the first direction and the in-plane direction perpendicular to the first direction is taken as the second direction, the strengths of the PTFE porous membrane in the first and second directions are each 20N/mm2 or more, and the elongations thereof at break in both directions are each 200% or less, with the ratio of the elongation in the second direction to that in the first direction being 0.5 to 2.0. The elongation and elongation anisotropy of the membrane as observed when an external force is applied thereto are small.
Inventors:
SHIMATANI, Shunichi (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
Application Number:
JP2011/002627
Publication Date:
December 22, 2011
Filing Date:
May 11, 2011
Export Citation:
Assignee:
NITTO DENKO CORPORATION (1-2 Shimohozumi 1-chome, Ibaraki-shi Osaka, 80, 〒5678680, JP)
日東電工株式会社 (〒80 大阪府茨木市下穂積１丁目１番２号 Osaka, 〒5678680, JP)
日東電工株式会社 (〒80 大阪府茨木市下穂積１丁目１番２号 Osaka, 〒5678680, JP)
International Classes:
C08J9/00; B01D39/16; B01D71/36; B32B5/32; B32B27/30; B32B37/10
Attorney, Agent or Firm:
KAMADA, Koichi (8th Fl, UMEDA PLAZA BLDG. ANNEX 4-3-25, Nishitenma, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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