Invention Grant
- Patent Title: Microporous polypropylene film and process for producing the same
- Patent Title (中): 微孔聚丙烯薄膜及其制造方法
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Application No.: US11578884Application Date: 2005-04-21
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Publication No.: US08491991B2Publication Date: 2013-07-23
- Inventor: Jun'ichi Masuda , Masatoshi Ohkura , Shigeru Tanaka , Reiko Morita , Hajime Fukushima
- Applicant: Jun'ichi Masuda , Masatoshi Ohkura , Shigeru Tanaka , Reiko Morita , Hajime Fukushima
- Applicant Address: JP
- Assignee: Toray Industries, Inc.
- Current Assignee: Toray Industries, Inc.
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2004-126571 20040422; JP2004-126572 20040422
- International Application: PCT/JP2005/007585 WO 20050421
- International Announcement: WO2005/103127 WO 20051103
- Main IPC: B32B5/22
- IPC: B32B5/22 ; B32B27/00 ; B32B3/26 ; C08J5/18
Abstract:
A microporous polypropylene film where film formability is improved in accordance with a β-crystal technique which allows microporous films to be continuously manufactured at low cost is disclosed. In addition, a microporous polypropylene film of which the specific gravity is further reduced is provided. Furthermore, a microporous polypropylene film with a significantly high permeability is provided. In addition, manufacturing methods for these microporous polypropylene films are provided.
Public/Granted literature
- US20070178324A1 Microporous polypropylene film and process for producing the same Public/Granted day:2007-08-02
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