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US 2011/0212358 A1Published application
Laminated porous film and separator for battery
AssigneeMitsubishi Plastics, Inc.
InventorsYasushi USAMI, Takeyoshi Yamada, Jun Takagi
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Abstract
A laminated porous film having at least two porous layers layered one upon another. One porous layer consists of a resin layer containing a polypropylene resin. The other layer is a heat-resistant layer consisting of a resin composition whose crystal fusion peak temperature is higher than that of the resin composition of the layer containing the polypropylene resin. The laminated porous film has a β activity and/or a β crystal generation power.
Claims20
A laminated porous film comprising:
- at least two porous layers consisting of a first layer and a second layer laminated one upon another,
- wherein said first layer contains a polypropylene resin;
- and said second layer is a heat-resistant layer consisting of a resin composition whose crystal fusion peak temperature is higher than that of a resin composition of said first layer;
- said laminated porous film having a β activity and/or a β crystal generation power.
1 more element
A laminated porous film comprising:
- at least two porous layers consisting of a first layer and a second layer laminated one upon another,
- wherein said first layer contains a polypropylene resin;
- and said second layer is a heat-resistant layer consisting of a resin composition containing a filler;
- said laminated porous film having a β activity and/or a β crystal generation power.
1 more element
Dependencies are inferred from the claim text.