Process for the preparation of fibrillated fiber structures

  • US 4,369,156 A
  • Filed: 02/25/1980
  • Issued: 01/18/1983
  • Est. Priority Date: 02/27/1979
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of fibrillated fiber structures by splitting polyamide and polyester multicomponent drawn fibers by treatment with an aqueous medium, characterized by fiberstructures, such as staple fiber, filaments, yarns, sheet structures, etc. of multicomponent fibers consisting of polyalkylene terephthalate and copolyamides based on ε

  • -caprolactam and hexamethylene diamine/adipamide, having over the cross section a matrix and multi-segment arrangement, whereby the segments represent a fraction of about 20-80% and at least 3 segments are aligned peripherally without being fully embedded into the matrix component, and whereby the peripheral segments and matrix have a shrinkage difference of at least 10%, and subjecting said fiber structures to an aqueous treatment consisting essentially of water in liquid or vapor form at a temperature of from about 55°

    C. to about 130°

    C., up to 5% of a water-soluble inorganic salt, from 0 to 5% of an alhoei and from 0 to 5% of a wetting agent.

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