US 12,247,110 B2
Polyolefin microporous membrane
Masaki Katayama, Tokyo (JP); Manabu Sekiguchi, Tokyo (JP); Ryoma Kawaguchi, Tokyo (JP); and Masaaki Kanao, Tokyo (JP)
Assigned to Asahi Kasei Battery Separator Corporation, Tokyo (JP)
Appl. No. 17/619,645
Filed by Asahi Kasei Battery Separator Corporation, Tokyo (JP)
PCT Filed Jun. 19, 2020, PCT No. PCT/JP2020/024244
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/256138, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-115778 (JP), filed on Jun. 21, 2019; and application No. 2020-015799 (JP), filed on Jan. 31, 2020.
Prior Publication US 2022/0411600 A1, Dec. 29, 2022
Int. Cl. C08J 9/00 (2006.01); C08J 9/28 (2006.01); H01M 50/411 (2021.01)
CPC C08J 9/28 (2013.01) [C08J 2323/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A polyolefin microporous membrane comprising polyethylene, wherein a non-reversing heat flow melting peak of the polyolefin microporous membrane measured with temperature increase by temperature modulated DSC at a temperature-elevating rate of 1° C./min is in the range of 141.0° C. to 150.0° C.