Title:
多孔性フルオロポリマーフィルムの製造方法
Document Type and Number:
Japanese Patent JP4094056
Kind Code:
B2
Abstract:
A method for preparing thin fluoropolymer (PTFE) films, said method generally having the steps of: a) providing an unsintered fluoropolymer film; b) pre-sintering expansion of the film; c) sintering the expanded film with dimensional restraint to prevent shrinkage; and d) post-sintering stretching of the film to a final thickness preferably less than 0.002 inches. The post-sintering stretching of the film in step d may be accomplished in a single step, or may include a series of post-sintering stretching steps. Steps b and c of the method may be carried out bypassing the calendared film through a machine direction orienter device and, thereafter, step d of the method may be accomplished by subsequently repassing the sintered film through the machine direction orienter device, one or more additional times.
Inventors:
Shannon, Donald
Kuo, Chris
Robert Peterson
Mccolumn, chris
Kuo, Chris
Robert Peterson
Mccolumn, chris
Application Number:
JP53345996A
Publication Date:
June 04, 2008
Filing Date:
May 01, 1996
Export Citation:
Assignee:
Edwards Lifesciences Corporation
International Classes:
B29C55/02; C08J5/18; B29C55/00; B29C67/04; C08J9/00; B29C43/00; B29C43/24; B29K27/12; B29K105/04; B29L7/00
Domestic Patent References:
| JP6256549A | ||||
| JP3174452A | ||||
| JP51030277A | ||||
| JP1247432A | ||||
| JP57102324A | ||||
| JP60187536A |
Attorney, Agent or Firm:
Hidesaku Yamamoto