Invention Grant
US08931647B2 Highly durable porous PVDF film, method of producing the same and washing method and filtration method using the same
有权
高耐久性多孔PVDF膜，其制造方法和洗涤方法及使用其的过滤方法
- Patent Title: Highly durable porous PVDF film, method of producing the same and washing method and filtration method using the same
- Patent Title (中): 高耐久性多孔PVDF膜，其制造方法和洗涤方法及使用其的过滤方法
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Application No.: US12297580Application Date: 2007-04-16
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Publication No.: US08931647B2Publication Date: 2015-01-13
- Inventor: Satoshi Shiki , Hiroyoshi Ohya , Noboru Kubota , Makiko Hattori
- Applicant: Satoshi Shiki , Hiroyoshi Ohya , Noboru Kubota , Makiko Hattori
- Applicant Address: JP Tokyo
- Assignee: Asahi Kasei Chemicals Corporation
- Current Assignee: Asahi Kasei Chemicals Corporation
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2006-115973 20060419
- International Application: PCT/JP2007/058272 WO 20070416
- International Announcement: WO2007/119850 WO 20071025
- Main IPC: B01D71/34
- IPC: B01D71/34 ; B01D69/02 ; B01D67/00 ; C08J5/18 ; B01D69/08
Abstract:
The present invention provides a PVDF porous film and method for producing it, which has high water permeability and high chemical resistance to washing chemicals and the like that has been difficult to realize with conventional polymer porous films, and which can be used over a prolonged period of time, and a method of producing the same and the like. Namely, the present invention provides a porous film in which the degree of crystallization of the PVDF resin is 50% or more but not more than 90%, and the product of the degree of crystallization of the PVDF resin and the specific surface area of the film is 300 (%·m2/g) or more but not more than 2000 (%·m2/g).
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