LAMINATED POROUS FILM, SEPARATOR FOR BATTERY, AND BATTERY
First Claim
1. A laminated porous film, comprising:
- a porous film layer comprising a first thermoplastic resin composition as a main component thereof and having a thickness not less than 10 μ
m anda nonwoven cloth layer comprising a second thermoplastic resin composition as a main component thereof and having a fiber diameter of not more than 1 μ
m,wherein the first thermoplastic resin composition has a crystalline melting peak temperature of from 150°
C. to 250°
C., the second thermoplastic resin composition has a crystalline melting peak temperature of from 100°
C. to 150°
C., and the laminated porous film has an air permeability of from 10 to 10000 seconds 100 mL.
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Abstract
The purpose is to provide a laminated porous film having shutdown characteristics, which are important in terms of ensuring safety, while also having excellent air permeation performance, which contributes to electrical performance, when used a separator for a battery. The present invention is a laminated porous film characterized by comprising: a porous film layer having a thickness of 10 um or more, the main component thereof being a thermoplastics resin composition having a crystal-melting peak temperature of 150-250° C.; and a nonwoven fiber layer having a fiber diameter of 1 um or less, the main component thereof being a thermoplastic resin composition having a crystal-melting peak temperature of 100° C. to less than 150° C.; the air permeability of the laminated porous film being 10-10,000 s/100 mL.
23 Citations
18 Claims
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1. A laminated porous film, comprising:
-
a porous film layer comprising a first thermoplastic resin composition as a main component thereof and having a thickness not less than 10 μ
m anda nonwoven cloth layer comprising a second thermoplastic resin composition as a main component thereof and having a fiber diameter of not more than 1 μ
m,wherein the first thermoplastic resin composition has a crystalline melting peak temperature of from 150°
C. to 250°
C., the second thermoplastic resin composition has a crystalline melting peak temperature of from 100°
C. to 150°
C., and the laminated porous film has an air permeability of from 10 to 10000 seconds 100 mL. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification