High-viscosity elastomeric adhesive composition
First Claim
1. An elastomeric adhesive composition, comprising:
- a base polymer; and
a high softening point tackifier resin having a softening point of about 80 degrees Celsius or greater, and a viscosity of about 1500 cps or greater at 182 degrees Celsius;
wherein the elastomeric adhesive composition has a viscosity between about 100,000 and about 500,000 cps at between about 149 and about 177 degrees Celsius; and
wherein the elastomeric adhesive composition further comprises an absorbent materialwherein the absorbent material comprises hydrophilic fibers, combinations of hydrophilic and hydrophobic fibers, or a super-absorbent material selected from the group consisting of natural polymers, synthetic polymer, modified natural polymers, and combinations thereof.
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Abstract
High-viscosity elastomeric adhesive compositions including a high softening point tackifier resin in combination with a base polymer can be used to create elastomeric composite laminates having effective adhesion and elastic properties. The elastomeric adhesive compositions suitably have a viscosity between about 100,000 and about 500,000 cps at between about 300 degrees Fahrenheit (149 degrees Celsius) and about 350 degrees Fahrenheit (177 degrees Celsius). Facing layers, such as nonwoven webs, films, elastic strands, fastening material, absorbent material, and the like, can be laminated to one or both surfaces of the elastomeric compositions to form elastomeric composite laminates. A method of making such compositions and laminates involves forming the compositions into elastomeric adhesive films and/or strands.
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Citations
19 Claims
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1. An elastomeric adhesive composition, comprising:
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a base polymer; and a high softening point tackifier resin having a softening point of about 80 degrees Celsius or greater, and a viscosity of about 1500 cps or greater at 182 degrees Celsius; wherein the elastomeric adhesive composition has a viscosity between about 100,000 and about 500,000 cps at between about 149 and about 177 degrees Celsius; and wherein the elastomeric adhesive composition further comprises an absorbent material wherein the absorbent material comprises hydrophilic fibers, combinations of hydrophilic and hydrophobic fibers, or a super-absorbent material selected from the group consisting of natural polymers, synthetic polymer, modified natural polymers, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19)
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15. An elastomeric adhesive composition, comprising:
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a base polymer, present in an amount between about 40% and about 80% by weight; a high softening point tackifier resin having a softening point of about 80 degrees Celsius or greater, and a viscosity of about 1500 cps or greater at 182 degrees Celsius, present in an amount between about 20% and about 40% by weight; and a low softening point additive having a softening point of about 60 degrees Celsius or less and a viscosity of about 1000 cps or less at 182 degrees Celsius, present in an amount between about 0% and about 20% by weight; wherein the elastomeric adhesive composition has a viscosity between about 100,000 and about 500,000 cps at between about 149 and about 177 degrees Celsius; and wherein the elastomeric adhesive composition further comprises an absorbent material. - View Dependent Claims (16)
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17. A method of making an elastomeric adhesive composition, comprising the steps of:
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forming a solid phase composition of a base polymer and a high softening point tackifier resin having a softening point of about 80 degrees Celsius or greater and a viscosity of about 1500 cps or greater at 182 degrees Celsius; forming a liquid phase composition by heating the solid phase composition to a temperature of about 191 degrees Celsius or lower; achieving a viscosity of the liquid phase composition between about 100,000 and about 500,000 cps at between about 149 and about 177 degrees Celsius; and forming an elastomeric adhesive composition by extruding the liquid phase composition through hot-melt equipment; and incorporating an absorbent material into the elastomeric adhesive composition.
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Specification