Fiber structures of split multicomponent fibers and process therefor

  • US 4,239,720 A
  • Filed: 03/01/1979
  • Issued: 12/16/1980
  • Est. Priority Date: 03/03/1978
  • Status: Expired due to Term
First Claim
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1. A process for making fiber structures by splitting multicomponent fibers by treatment with an organic solvent, comprising treating shrinkable, essentially nonset multicomponent fibers comprising at least two incompatible components, which are arranged over the cross section of the fiber so as to form as to form a matrix and a plurality of segments, said segments comprising from about 20% to about 80% of the total cross section and at least three segments being arranged peripherally without being completely embedded in the matrix component, with a liquid or gaseous organic solvent which will lower the zero shrinkage temperature of one of the matrix polymer or the segment polymer by at least 160°

  • C., and in which the polymer components of the fiber exhibit a differential shrinkage, said treatment being carried out at a temperature and for a time sufficient to entirely or partly split said multicomponent fibers into separate segments.

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