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Process for the production of fibers from poly(etheretherketone)-type polymers

  • US 4,904,426 A
  • Filed: 03/31/1988
  • Issued: 02/27/1990
  • Est. Priority Date: 03/31/1988
  • Status: Expired due to Fees
First Claim
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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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