Polyolefin-containing extrudable compositions and methods for their formation into elastomeric products including microfibers
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United States of America Patent
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May 5, 1987
Grant Date -
N/A
app pub date -
Jul 30, 1985
filing date -
Jul 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The disclosure is generally directed to an extrudable elastomeric composition formed by blending from at least 10 percent, by weight, of an A-B-A' block copolymer where 'A' and 'A'' are each a thermoplastic endblock which includes a styrenic moiety and where 'B' is an elastomeric poly(ethylene-butylene) midblock with up to at least about 90 percent, by weight, of at least one polyolefin which, when blended with the A-B-A' block copolymer and subjected to an effective combination of elevated temperature and elevated pressure conditions, is adapted to be extruded in blended form, with the A-B-A' block copolymer. Fibrous nonwoven elastomeric webs may be formed from the extrudable composition and processes for forming the fibrous nonwoven elastomeric webs are also disclosed.
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