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Stretch composites and methods of making the composite

  • US 8,480,840 B2
  • Filed: 10/06/2006
  • Issued: 07/09/2013
  • Est. Priority Date: 11/05/2001
  • Status: Active Grant
First Claim
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1. A process for making a stretch composite from an extensible substrate, said process comprising the steps of:

  • a. providing a first extensible substrate;

    b. providing an application device, said device including at least one patterned print roll;

    c. printing one or more elastomeric compositions by means of said patterned print roll, said compositions having a melt viscosity of from about 1 to about 150 Pa·

    s, measured at 175°

    C. and 1 s

    1
    strain rate, an elasticity of at least about 50 N/m at 20°

    C., and a percent set of less than about 20%, onto said substrate thereby forming one or more intermediate structures;

    d. incrementally stretching one or more portions of the intermediate structures to permanently elongate the substrate in the portions; and

    e. converting the elastomeric composition into elastomeric members forming one or more elasticized regions of the substrate;

    wherein said elastomeric composition comprises a thermoplastic elastomer and a phase change solvent having the general formula;


    R′



    Ly

    (Q−

    Lx)n-1

    Q−

    Ly

    R;





    (I)
    R′



    Ly

    (Q−

    Lx)n

    R;





    (II)
    R′



    (Q−

    Lx)n

    R;





    (III)
    R′



    (Q−

    Lx)n-1

    Q−

    Ly

    R;





    (IV)
    R′



    (Q−

    Lx)n-1

    Q−

    R;

    or 



    (V)a mixture thereof;

    wherein Q is a para-ring substituted difunctional aromatic moiety, wherein the substitutions are in the 1,4 positions;

    L is CH2;

    R and R′

    are the same or different and are independently selected from H, CH3, COOH, CONHR1, CONR1R2, NHR3, NR3R4, hydroxy, or C1-C30 alkoxy;

    wherein R1, R2, R3 and R4 are the same or different and are independently selected from H or linear or branched alkyl from C1-C30;

    x is an integer from 1 to 30;

    y is an integer from 1 to 30; and

    n is an integer from 3 to 7.

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