Nonwoven for manufacturing flameproof roofing sheets

Details Nonwoven for manufacturing flameproof roofing sheets Nonwoven for manufacturing flameproof roofing sheets

1985-05-16

1987-07-28

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428290, 428489, 428920, 428921, B32B 2734

Patent

active

046831649

ABSTRACT:
The invention relates to a nonwoven made of synthetic fibers or filaments for preparing roofing sheets by coating with fusible coating compositions. A nonwoven of this type is provided with a flame-retardant finish which is still inert at the processing temperatures of the coating composition (for example up to about 250.degree. C.) but which at higher temperatures forms a largely continuous, preferably foamlike, layer which in the event of a fire preferably remains in place even if the supporting fibers or filaments of the nonwoven melt away.

REFERENCES:
patent: 3816226 (1974-06-01), Finelli

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