Elastic attachment adhesive and use thereof
AssigneeHenkel Corporation
InventorsMaria Cristina Barbosa DeJesus, Charles Paul, Valerie Alexis
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Abstract
The present invention relates to elastic attachment adhesives that comprise non-metallocene catalyzed polymers. The elastic attachment adhesives have stable creep performance under prolonged aging parameters, making these adhesives particularly well suited for elastic applications.
Claims20
An elastic attachment hot melt adhesive comprising a tackifier and a polymer having a viscosity lower than about 200,000 mPas at 200° C. in accordance with ASTM D3236;
- wherein the polymer comprises a non-metallocene catalyzed polymer degraded with peroxide and/or heat;
- and
- wherein the non-metallocene catalyzed polymer is a polypropylene homo or copolymer with a heat of fusion greater than 20 J/g measured in accordance with ASTM D3418-12;
- wherein the adhesive has a tan δ value of greater than about 30 at the adhesive application temperature;
- and
- wherein the amount of tackifier is less than the amount of the polymer in the adhesive.
An elastic attachment hot melt adhesive comprising a polymer that comprises greater than 50 wt % of a non-metallocene catalyzed polymer with a heat of fusion greater than 20 J/g and less than 50% of a flexibilizer with a heat of fusion less than 15 J/g;
- wherein the polymer is has a viscosity lower than about 200,000 mPas at 200° C. in accordance with ASTM D3236 formed by degradation with a peroxide and/or heat;
- wherein the wt % is based on the total wt % of the polymer;
- and
- wherein the heat of fusion is measured in accordance with ASTM D3418-12.
A laminant comprising:
- (a) a nonwoven substrate,
- (b) an elastic strand
- (c) an elastic attachment hot melt adhesive comprising a polymer that comprises greater than 50 wt % of a non-metallocene catalyzed polypropylene polymer with a heat of fusion greater than 20 J/g and less than 50% of a flexibilizer with a heat of fusion less than 15 J/g;
- wherein the polymer is has a viscosity lower than about 200,000 mPas at 200° C. in accordance with ASTM D3236 formed by degradation with a peroxide and/or heat;
- wherein the wt % is based on the total wt % of the polymer;
- and
- wherein the heat of fusion is measured in accordance with ASTM D3418-12.
Dependencies are inferred from the claim text.