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Two-way stretch fabric and method for the preparation thereof

  • US 5,102,724 A
  • Filed: 01/31/1989
  • Issued: 04/07/1992
  • Est. Priority Date: 06/10/1987
  • Status: Expired due to Fees
First Claim
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1. A method for the preparation of a fabric which has a stretching rate in both of the longitudinal direction and the lateral direction within the following range:

  • ##EQU5## wherein L1 is the vertical length of a specimen of a definite length and 5 cm wide when loaded by 5 g weight and L2 is the vertical length of said specimen when loaded by a given weight, which is 240 g when said fabric is non-woven fabric and 1500 g when said fabric is woven or knitted fabric, characterized in preparing by fiber intermingling, weaving or knitting a raw fabric comprising a polyester conjugate fiber having a birefringence of 85×

    10-3 to 190×

    10-3 in an amount of at least 30 weight % and a crimp number of 8 to 13/inch, which is produced by conjugate spinning a polyethylene terephthalate (component A) copolymerized with a structural unit having a metal sulfonate group in a ratio of 1.5 to 6.0 mol % and a polyethylene terephthalate or polybutylene terephthalate (component B) in side by side method, drawing the product, and mechanically crimping the fiber to a crimp number of 8 to 13/inch, and irradiating the raw fabric with far-infrared rays in a relaxed condition to proceed three-dimensional crimping of said conjugate fiber to produce a stretch fabric comprising said conjugate fiber having a birefringence of 90×

    10-3 to 195×

    10-3.

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