Tear-resistant low set elastic film and method of making
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United States of America Patent
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Oct 29, 2002
Grant Date -
N/A
app pub date -
Feb 15, 2000
filing date -
Feb 15, 2000
priority date (Note) -
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Abstract
A tough low set elastic film exhibiting surprisingly high tear resistance and method of making the same. The film of the invention is especially beneficial when holes form on the films during manufacturing or normal wear and method of making. The film has activated and non-activated zones formed during an activation process. The activated zones allow the film to expand without generating excessive tensional forces. The film has M-polypropylene or M-polyethylene skin layers and a core layer having an elastomeric polyurethane, ethylene copolymer such as ethylene vinyl acetate styrenic elastomer, an ethylene/propylene copolymer elastomer or ethylene/propylene/diene terpolymer elastomer. The activation process allows the skin layers to behave more like the core layer.
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