US 12,138,842 B2
PTFE porous membrane with a high strength and small pore size
Kohei Miyamae, Shizuoka (JP); Shunichi Shimatani, Shizuoka (JP); Kazuo Konabe, Shizuoka (JP); and Ken Miura, Shizuoka (JP)
Assigned to Chemours-Mitsui Fluoroproducts Co., Ltd., Tokyo (JP)
Appl. No. 17/764,175
Filed by Chemours-Mitsui Fluoroproducts Co. Ltd., Tokyo (JP)
PCT Filed Sep. 24, 2020, PCT No. PCT/JP2020/035919
§ 371(c)(1), (2) Date Mar. 26, 2022,
PCT Pub. No. WO2021/060328, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-176724 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0355525 A1, Nov. 10, 2022
Int. Cl. B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/36 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 55/14 (2006.01); B29K 27/18 (2006.01); B29K 105/04 (2006.01)
CPC B29C 48/022 (2019.02) [B01D 67/0027 (2013.01); B01D 67/0083 (2013.01); B01D 69/02 (2013.01); B01D 71/36 (2013.01); B29C 48/08 (2019.02); B29C 55/14 (2013.01); B01D 2325/02831 (2022.08); B01D 2325/28 (2013.01); B29K 2027/18 (2013.01); B29K 2105/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A polytetrafluoroethylene porous film, wherein the polytetrafluoroethylene porous film is a single polytetrafluoroethylene porous film having a bubble point in isopropyl alcohol (IPA) according to JIS K3832 not less than 400 kPa and a tensile strength based on JIS K6251 not less than 59.6 MPa.