Low stress relaxation composite elastic material
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United States of America Patent
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-
Dec 8, 1992
Grant Date -
N/A
app pub date -
Jan 10, 1990
filing date -
Jan 10, 1990
priority date (Note) -
Expired
status (Latency Note)
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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.
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