C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B01D 39/16 (2006.01) B01D 67/00 (2006.01) B01D 71/36 (2006.01) B29C 55/00 (2006.01) B29C 55/12 (2006.01)
Patent
CA 2074349
The present invention is directed to a polytetrafluoroethylene porous film, which is prepared by stretching a semisintered polytetrafluoroethylene material and heating the stretched material at a temperature higher than the melting point of sintered polytetrafluoroethylene. It has an area ratio of fibrils to nodes of from 99:1 to 75:25, an average fibril diameter of from 0.05 to 0.2 Vim, a largest node area of not larger than 2µm2 and an average pore size of from 0.2 to 0.5 µm and achieves low pressure loss.
Inoue Osamu
Kusumi Toshio
Nishibayashi Hirofumi
Tamaru Shinji
Tanaka Osamu
Daikin Industries Ltd.
Inoue Osamu
Kirby Eades Gale Baker
Kusumi Toshio
Nishibayashi Hirofumi
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