Claims
- 1. A method for preparing a molded article of fluorine-containing polymer having increased water-repellency, which comprises:
- (a) roughening a surface of said molded article with a shot blast to an irregularity of 0.1 to 50 .mu.m; and
- (b) contacting the roughened surface with fluorine gas at a temperature of about 100.degree. C. to 300.degree. C., using a concentration of said fluorine gas of about 10 to 500 torr, with a treatment time of from about 10 minutes to one hour.
- 2. The method of claim 1, wherein said fluorine-containing polymer is selected from the group consisting of polytetrafluoroethylene, tetrafluoroethylenepolytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymers, tetrafluoroethylenehexafluoropropylene copolymer, polychlorotrifluoroethylene, tetrafluoroethylene-ethylene copolymer, chlorotrifluoroethylene-ethylene copolymers, polyvinylidene fluoride and polyvinyl fluoride.
- 3. The method of claim 1, wherein said irregularity is from 0.2 to 15 .mu.m.
- 4. The method of claim 1, wherein said fluorine-containing polymer is polytetrafluoroethylene.
Priority Claims (3)
Number |
Date |
Country |
Kind |
5-005926 |
Jan 1993 |
JPX |
|
5-162017 |
Jun 1993 |
JPX |
|
5-290718 |
Nov 1993 |
JPX |
|
Parent Case Info
This application is a Continuation of application Ser. No. 08/181,098, filed on Jan. 13, 1994, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (2)
Number |
Date |
Country |
48-13712 |
Apr 1973 |
JPX |
4-309532 |
Nov 1992 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Loh et al. (1987) Polym. Eng. Sci 27(11), 861-8. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
181098 |
Jan 1994 |
|