Flame-resistant composite substrates for bituminous membranes

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United States of America

PATENT NO 12195973
APP PUB NO 20220316212A1
SERIAL NO

17608756

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Abstract

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A porous composite substrate for producing bituminous membranes, comprising a first nonwoven and a second nonwoven layer which comprise polyester fibers, and an intermediate nonwoven layer comprising organic flame-resistant fibers. A combustion temperature of the organic flame-resistant fibers is at least 500° C. and/or a limiting oxygen index (LOI) of the organic flame-resistant fibers is at least 25%. The composite substrate is mechanically consolidated.

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Patent Owner(s)

Patent OwnerAddress
POLITEX S A S DI FREUDENBERG POLITEX S R L20121 MILAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rocchetta, Luigi Brembio, IT 1 0

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