Claims
- 1. An improved intermediate fiber structure consisting essentially of a mixture of particles of a fluorinated olefinic polymer, a coagulated matrix polymer and water wherein the ratio of the weight of the polymer particles to that of the matrix polymer in the intermediate fiber structure is from about 3 to 1 to about 20 to 1 and wherein the matrix polymer is a cellulosic ether having a degree of substitution that is no more than about 0.5 and no less than about 0.02 and wherein the matrix polymer forms with the fluorinated polymer particles a washed fiber structure having a self supporting length of at least 30 cm and that is substantially free of ions.
- 2. The intermediate fiber structure of claim 1 wherein the matrix polymer is hydroxypropylcellulose, or hydroxyethylcellulose.
- 3. The intermediate fiber structure of claim 1 wherein the ratio of the weight of the polymer particles to that of the matrix polymer is about 9 to 1.
- 4. The intermediate fiber structure of claim 1 wherein the fluorinated olefinic polymer is selected from the group consisting of poly(tetrafluoroethylene), co-polymers of tetrafluoroethylene and hexafluoropropene, co-polymers of tetrafluoroethylene and perfluoroalkyl-vinyl ethers and fluorinated olefinic terpolymers of these monomers.
- 5. The intermediate fiber structure of claim 1 wherein the fluorinated olefinic polymer is poly(tetrafluoroethylene) and the matrix polymer is hydroxypropylcellulose.
Parent Case Info
This is a division of application Ser. No. 08/770,530, filed Dec. 20, 1996 now U.S. Pat. No. 5,762,846.
Divisions (1)
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Number |
Date |
Country |
Parent |
770530 |
Dec 1996 |
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