Process for the production of fibers from poly(etheretherketone)-type polymers
First Claim
1. A process for preparing microporous poly(etheretherketone)-type fibers, comprisingA. forming an extrusion mixture of(1.) at least one unsulfonated poly(etheretherketone)-type polymer,(2.) a solvent comprising at least one organic compound consisting predominantly of carbon and hydrogen and optionally oxygen, nitrogen, sulfur, halogen, and mixtures thereof, wherein the organic compound has a molecular weight of between about 160 and 450, contains at least one six membered aromatic ring structure, possesses a boiling point of between about 240 and 480 degrees Celsius, and is capable of dissolving at least about 10 weight percent of the poly(etheretherketone)-type polymer present at the extrusion temperature,B. extruding the fluid to form solid or hollow fibers;
- C. conveying the fibers through at least one quench zone wherein the fibers cool and solidify;
D. conveying the fibers through at least one leach zone wherein a substantial portion of the solvent is removed; and
E. drying the fibers;
wherein the fibers so formed possess interconnecting or non-interconnecting pores.
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Accused Products
Abstract
A process for preparing microporous poly(etheretherketone)-type fibers comprising forming an extrusion mixture of at least one unsulphonated poly(etheretherketone)-type polymer and a solvent comprising at least one organic compound consisting predominantly of carbon and hydrogen, wherein the organic compound has a molecular weight of between about 160 and 450, contains at least one six membered aromatic ring structure, possesses a boiling point of between about 240 and 480 degrees Celsius, and is capable of dissolving at least about 10 weight percent of the poly(etheretherketone)-type polymer present at the extrusion temperature, extruding to form solid or hollow fibers, conveying the fibers through at least one quench zone, conveying the fibers through at least one leach zone, and drying the fibers, wherein the fibers so formed possess interconnecting or non-interconnecting pores.
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Citations
24 Claims
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1. A process for preparing microporous poly(etheretherketone)-type fibers, comprising
A. forming an extrusion mixture of (1.) at least one unsulfonated poly(etheretherketone)-type polymer, (2.) a solvent comprising at least one organic compound consisting predominantly of carbon and hydrogen and optionally oxygen, nitrogen, sulfur, halogen, and mixtures thereof, wherein the organic compound has a molecular weight of between about 160 and 450, contains at least one six membered aromatic ring structure, possesses a boiling point of between about 240 and 480 degrees Celsius, and is capable of dissolving at least about 10 weight percent of the poly(etheretherketone)-type polymer present at the extrusion temperature, B. extruding the fluid to form solid or hollow fibers; -
C. conveying the fibers through at least one quench zone wherein the fibers cool and solidify; D. conveying the fibers through at least one leach zone wherein a substantial portion of the solvent is removed; and E. drying the fibers; wherein the fibers so formed possess interconnecting or non-interconnecting pores. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification