LAMINATED POROUS FILM

• US 20100159318A1
• Filed: 05/09/2008
• Published: 06/24/2010
• Est. Priority Date: 05/14/2007
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Sato, Hiroyuki, Suzuki, Yutaka, Okamoto, Satoshi, Ohtomo, Shinji
• Application Number:
  US12/600,227
• Publication Number:
  US 20100159318A1
• Time in Patent Office: Days
• US Class Current: 429/129
• CPC Class Codes: H01G 11/52 Separators
• CPC Class Codes: H01G 9/02 Diaphragms; Separators
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 50/414 Synthetic resins, e.g. thermoplastics or thermosetting resins
• CPC Class Codes: H01M 50/443 Particulate material
• CPC Class Codes: H01M 50/446 Composite material consisting of a mixture of organic and inorganic materials
• CPC Class Codes: H01M 50/449 having a layered structure
• CPC Class Codes: H01M 50/489 Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
• CPC Class Codes: H01M 50/491 Porosity
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/249993 Hydrocarbon polymer

Abstract

Provided is a laminated porous film comprising a laminate of a heat-resistant porous layer containing a heat-resistant resin and a shutdown layer containing a thermoplastic resin, wherein the film has a free chlorine content of 1×10² ppm by weight or less.

Claims

1. A laminated porous film comprising a laminate of a heat-resistant porous layer containing a heat-resistant resin and a shutdown layer containing a thermoplastic resin, wherein the film has a free chlorine content of 1×

10² ppm by weight or less.

2. The laminated porous film according to claim 1, wherein the heat-resistant resin comprises a liquid crystalline polyester.

3. The laminated porous film according to claim 1 or 2, wherein the heat-resistant porous layer further contains a filler.

4. The laminated porous film according to claim 1 or 2, wherein the thermoplastic resin is polyethylene.

5. The laminated porous film according to claim 1 or 2, wherein the heat-resistant porous layer has a thickness of 1 μ

m or more and 10 μ

m or less.

6. The laminated porous film according to claim 1 or 2, wherein the heat-resistant porous layer is a coated layer.

7. A separator made of the laminated porous film according to claim 1 or 2.

8. A battery comprising the separator according to claim 7.

9. A capacitor comprising the separator according to claim 7.