Claims
- 1. A filter felt comprising a layered batt of fibers and a scrim, the layered batt of fibers comprising an intimate blend of from about 1-30 weight percent dual glass fibers, from about 1-60 weight percent uncrimped fiber and from about 10-98 weight percent of a crimped fiber, wherein the uncrimped fiber is present in an amount equal to or greater than the dual glass fibers.
- 2. The filter felt of claim 1 wherein the uncrimped fiber is a glass fiber and the crimped fiber is selected from the group consisting of aramid fibers and fluoropolymer fibers.
- 3. The filter felt of claim 2 wherein the batt contains about 20 weight percent dual glass fiber, 30 to 50 percent of an uncrimped glass fiber having a diameter range of 5.84 to 6.85 microns and 50 to 30 weight percent crimped poly(tetrafluoroethylene) fibers.
- 4. The filter fabric of claim 1 or 3 on which is laminated a porous or expanded fluoropolymer membrane.
Parent Case Info
This is a division of Application Ser. No. 09/414,204 filed Oct. 7, 1999 now U.S. Pat. No. 6,151,763, which is a Division of Application Ser. No. 09/030,682 filed Feb. 25, 1998, now Granted and bearing U.S. Pat. No. 6,010,785.
The present invention relates to an intimate blend of fibers wherein one of the fibers is a dual glass fiber and the other is an uncrimped fiber. This combination of the two types of fibers allows practical textile processing of the dual glass fiber.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1030570 |
May 1966 |
GB |
WO 9512554 |
May 1995 |
WO |
WO 9529880 |
Nov 1995 |
WO |
Non-Patent Literature Citations (1)
Entry |
Technology Focus, Mechanical Engineering, Feb. 1995, vol. 117, No. 2, p. 38. |