Stress-softened elastomeric films, articles, and method and apparatus for making such films and articles
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United States of America Patent
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Aug 9, 1994
Issued Date -
N/A
app pub date -
Oct 11, 1991
filing date -
Nov 15, 1988
priority date (Note) -
Expired
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Abstract
A stress-softened thermoplastic elastomeric (TPE) film which has been subjected to tensional deformation comprising at least uniaxial strain, and having improved textural and thermal transmissivity characteristics, as compared to a native, unstretched material. Such stress-softened thermoplastic elastomeric film may be employed in a wide variety of articles, including condoms, finger cots, tubular bandages, and the like. Condoms comprising such stress-softened TPE film are described, including condoms having a main sheath comprising stress-softened and non-stress-softened areas in a pattern or other predetermined arrangement. A variety of methods and apparatus for forming stress-softened tubular articles of thermoplastic elastomeric film is disclosed.
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