Claims
- 1. A method of producing an improved composite fabric, which comprises:
- providing filaments of fiberglass;
- providing filaments of polytetrafluoroethylene (PTFE);
- commingling the filaments of fiberglass and PTFE by air-jet texturing the filaments so as to separate the filaments of PTFE and to fragment filaments of fiberglass to form a strand of composite fiber, wherein fragments of fiberglass filaments are interspersed within the filaments of PTFE; and
- weaving multiple composite fibers into a fabric.
- 2. The method of claim I which further comprises providing PTFE filaments in the form of a tow yarn formed from expanded PTFE.
- 3. The method of claim 1 which further comprises providing fiberglass filaments in a relative proportion of 10 to 75% by weight of the fiber.
- 4. The method of claim 3 which further comprises providing PTFE filaments in the form of a tow yarn comprising 25 to 90% by weight of the fiber.
- 5. The method of claim 1 which further comprises weaving multiple composite fibers into a fabric.
- 6. The method of claim 5 which further comprises attaching a membrane of expanded PTFE to the fabric.
- 7. The method of claim 6 which further comprises forming the fabric and attached membrane of expanded PTFE into a filter.
RELATED APPLICATIONS
The present application is a division of U.S. patent application Ser. No. 08/307,539 filed Sep. 16, 1994, now allowed U.S. Pat. No. 5,549,960 which is a division of U.S. patent application Ser. No. 08/033,678 filed Mar. 16, 1993, which is abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0 066 414 |
Dec 1982 |
EPX |
0 226 471 |
Jun 1987 |
EPX |
0 358 222 |
Mar 1990 |
EPX |
Non-Patent Literature Citations (2)
Entry |
International Search Report for PCT/US 93/03477. |
Literature: "The Demands Made by Glass Fabrics on Weving Machinery," copyright 1992, Elsevier Science Publishers, Technical Textiles International, Sep. 1992, pp. 17-19. |
Divisions (2)
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Number |
Date |
Country |
Parent |
307539 |
Sep 1994 |
|
Parent |
33678 |
Mar 1993 |
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