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Bi-directional and multi-axial fabric and fabric composites

  • US 7,073,538 B2
  • Filed: 10/19/2004
  • Issued: 07/11/2006
  • Est. Priority Date: 06/07/2002
  • Status: Expired due to Fees
First Claim
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1. A knitted fabric comprising:

  • a) a first set of continuous filament unidirectional yarns lying in a first plane;

    b) a second set of continuous filament unidirectional yarns lying in a second plane above said first plane and arranged transversely to said first set of yarns; and

    c) a third set of yarns forming interlocking loops interlaced with said first and said second set of yarns, each yarn of the third set lying above some and below the remaining yarns of said first and said second sets of yarns;

    wherein the yarns of each of said first and said second sets have tenacity'"'"'s equal to or greater than about 15 g/d, initial tensile moduli equal to or greater than about 400 g/d and energies-to-break equal to or greater than about 22 J/g, as measured by ASTM D2256; and

    wherein the yarns of each of said first and said second sets, in proportion to the yarns comprising said third set of yarns, have at least twice the breaking strength and one half the elongation to break.

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