Method of making a thermally stable acoustical insulation microf

Plastic and nonmetallic article shaping or treating: processes – With twining – plying – braiding – or textile fabric formation

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26421112, 19296, B29D 2800

Patent

active

059619040

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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