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Elastic composite yarn, methods for making the same, and articles incorporating the same

  • US 7,765,835 B2
  • Filed: 11/08/2005
  • Issued: 08/03/2010
  • Est. Priority Date: 11/15/2004
  • Status: Active Grant
First Claim
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1. An elastic composite yarn comprising:

  • a composite core and a composite covering;

    wherein the composite core comprises;

    (a) an elastic core member having relaxed unit length L and a drafted length of (N×

    L), wherein N is in the range of about 1.0 to about 8.0; and

    (b) an inelastic functional core member having a fixed length of (N×

    L); and

    wherein the composite covering comprises;

    (a) at least an elastic covering member; and

    (b) at least one inelastic covering member surrounding the elastic covering member;

    wherein the composite covering has a relaxed length that is greater than the drafted length (N×

    L), of the elastic core member, such that substantially all of an elongating stress imposed on the composite yarn is carried by the elastic core member and the elastic covering member.

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