Invention Grant
- Patent Title: Micro-porous multi-layer membrane film based on polypropylene for batteries with a cut-off function
- Patent Title (中): 基于聚丙烯的微孔多层膜膜具有截止功能
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Application No.: US12990238Application Date: 2009-04-23
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Publication No.: US08906540B2Publication Date: 2014-12-09
- Inventor: Thilo Mohr , Detlef Busch , Bertram Schmitz , Christian Peters
- Applicant: Thilo Mohr , Detlef Busch , Bertram Schmitz , Christian Peters
- Applicant Address: DE
- Assignee: Treofan Germany GmbH & Co. KG
- Current Assignee: Treofan Germany GmbH & Co. KG
- Current Assignee Address: DE
- Agency: Drinker Biddle & Reath LLP
- Priority: DE102008021996 20080502
- International Application: PCT/EP2009/002961 WO 20090423
- International Announcement: WO2009/132802 WO 20091105
- Main IPC: H01M2/16
- IPC: H01M2/16 ; B32B7/02 ; B29C55/12 ; B32B27/32 ; C08L23/12 ; B32B27/18 ; B29C55/02 ; B29C55/14 ; B29K23/00 ; C08L53/00 ; C08L23/10 ; C08L23/16 ; B29K105/00
Abstract:
The invention relates to a biaxially oriented microporous film composed of at least three coextruded layers encompassing an internal cut-off layer and two external layers, wherein all three layers contain a mixture of propylene homopolymer and propylene block copolymer and β-nucleation agent. The propylene block copolymer I of the external layers has a melting point exceeding 140° C. and the propylene block copolymer II of the internal layer has a melting range starting at a temperature ranging from 50 to 120° C. and the melting point of the propylene block copolymer I is greater than the melting point of the propylene block copolymer II.
Public/Granted literature
- US20110064990A1 MICRO-POROUS MULTI-LAYER MEMBRANE FILM BASED ON POLYPROPYLENE FOR BATTERIES WITH A CUT-OFF FUNCTION Public/Granted day:2011-03-17
Information query
