Method of making a thermally stable acoustical insulation microfiber web
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United States of America Patent
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Oct 5, 1999
Issued Date -
N/A
app pub date -
Apr 23, 1998
filing date -
May 29, 1996
priority date (Note) -
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Abstract
There is provided a thermally stabilized polypropylene melt-blown microfiber acoustical insulation web which has a resistance to thermal degradation at a temperature of 135.degree. C. for at least 10 days. The polypropylene has a thermal stabilizer uniformly distributed within the melt-blown microfiber polymer which polymer when produced is subject to thermal and/or catalytic degradation in the absence of significant levels of thermal stabilizer or antioxidant.
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