Method for producing a covering element made from fibers impregnated with bitumen having improved fire properties, and composition
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United States of America Patent
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Nov 26, 2019
Grant Date -
Dec 8, 2016
app pub date -
Jan 22, 2015
filing date -
Jan 28, 2014
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Abstract
A method for producing a covering element made from natural fibres, in particular cellulose, impregnated with bitumen, includes a step of coating at least one of two faces of a fibre mat (4) followed by a step of impregnating with bitumen, the coating being carried out with a liquid composition (5) including at least one resin and/or at least one pigment. The liquid composition is a dye composition including at least one pigment and at least one resin, and the method involves adding an additive to the liquid composition (5), the additive having fireproof properties and including at least graphite and a cooling agent. Preferably, the mat (4) is coated with the liquid composition including the fireproof additive using a roller.
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