Reversibly extensible film
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United States of America Patent
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-
Dec 30, 2003
Grant Date -
May 24, 2001
app pub date -
Dec 21, 2000
filing date -
Sep 10, 1998
priority date (Note) -
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Abstract
A reversibly extensible polymeric film is hot formed, as by coextrusion, using selected polymeric materials that provide discrete areas of elastic and inelastic polymeric materials arranged in laterally spaced and longitudinally elongated lanes or stripes connected by integrally formed joints therebetween. The elastic materials comprise block polymers selected from tetrablock, triblock and diblock polymers, and the inelastic material is selected from polyolefins such as polyethylene, polypropylene, poly(ethylene-propylene), poly(ethylene-vinyl acetate), poly(styrene-butadiene), or copolymers or blends thereof.
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