Low stress relaxation composite elastic material
AssigneeKimberly-Clark Corporation
InventorsL. Warren Collier, IV, Steven R. Stopper
Life of this patent
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Abstract
A composite elastic material having a stress relaxation of less than about 30 percent is composed of at least one elastic sheet formed from a blend of (1) a styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer or a mixture of styrene-poly(ethylene-propylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers, and (2) a tackifying resin. The blend may also include a polyolefin and/or an extending oil. The elastic sheet is joined to at least one gatherable layer at spaced-apart locations in which the gatherable layer is gathered between the spaced-apart locations so that the composite material is elastic.
Claims32
A composite elastic material having a stress relaxation of less than about 30 percent comprising:
- at least one elastic sheet formed from a blend comprising:
- an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers;
- and a tackifying resin;
- and
- at least one gatherable layer joined at spaced
- apart locations to the elastic sheet, and
- wherein the gatherable layer is gathered between the spaced-apart locations.
A composite elastic material having a stress relaxation of less than about 30 percent comprising:
- at least one elastic sheet formed from a blend comprising:
- an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers;
- a polyolefin;
- a tackifying resin;
- and an extending oil, and
- at least one gatherable layer joined to the elastic sheet at spaced apart locations, and
- wherein the gatherable layer is gathered between the spaced-apart locations.
Dependencies are inferred from the claim text.