Multi-layer, microporous polyethylene membrane,and battery...

Details Multi-layer, microporous polyethylene membrane,and battery... Multi-layer, microporous polyethylene membrane,and battery...

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) H01M 2/16 (2006.01)

Patent

CA 2611275

Disclosed is a polyethylene multilayer microporous membrane composed of at least three layers. This polyethylene multilayer microporous membrane comprises a first porous layer (a) composed of a polyethylene resin, and a second porous layer (b) containing a polyethylene resin, a heat-resistant resin having a melting point or glass transition point of not less than 150~C and a filler. At least both surface layers of the membrane are respectively constituted by the first porous layer (a), and at least one second porous layer (b) is interposed between the two surface layers.

L'invention concerne une membrane microporeuse multicouche en polyéthylène composée d'au moins trois couches. Cette membrane microporeuse multicouche en polyéthylène comprend une première couche (a) poreuse composée d'une résine de polyéthylène, et une seconde couche (b) poreuse contenant une résine de polyéthylène, une résine résistante aux hautes températures présentant un point de fusion ou un point de transition vitreuse égal ou supérieur à 150 °C, et une matière de charge. Les deux couches de surface de la membrane au moins, sont constituées chacune de la première couche (a) poreuse, et au moins une seconde couche (b) poreuse est interposée entre les deux couches de surface.

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