Thermally stable acoustical insulation

Details Thermally stable acoustical insulation Thermally stable acoustical insulation

D - Textiles, Paper

04

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D04H 1/56 (2006.01) B60J 5/00 (2006.01) B60J 5/04 (2006.01) B60R 13/08 (2006.01) C08K 5/134 (2006.01) D04H 1/42 (2006.01) B60R 11/00 (2006.01) B60R 11/02 (2006.01)

Patent

CA 2254840

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 °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.

Cette invention se rapporte à une bande isolante acoustique en microfibre produite par fusion-soufflage de polypropylène thermiquement stabilisée, qui possède une résistance à la dégradation thermique à une température de 135 DEG C pendant au moins 10 jours. Le polypropylène contient un stabilisant thermique réparti uniformément dans le polymère de microfibre produit par fusion-soufflage. Lors de sa production, ce polymère est soumis à une dégradation thermique et/ou catalytique en l'absence de niveaux importants de stabilisant thermique ou d'antioxydant.

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