Non-woven fabric, a bituminous water-proofing membrane built up

Details Non-woven fabric, a bituminous water-proofing membrane built up Non-woven fabric, a bituminous water-proofing membrane built up

1984-12-07

1986-10-14

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428280, 428282, 428288, 428291, 428297, 428489, 428913, D04H 108

Patent

active

046172297

ABSTRACT:
A non-woven fabric for use as a bitumen coated and possibly bitumen impregnated carcass in a water-proofing membrane, particularly for roofs, is distinguished in that a proportion of at least 75% by weight of the fabric fibers comprise organic synthetic fibers, preferably polyester fibers, and cellulose fibers, preferably wood pulp fibers, the organic synthetic fibers constituting at least 10 and at most 90% by weight of this fiber proportion. The non-woven fabric is coated with a binder compatible with bitumen in an amount of at least 10%, preferably at least 20% of the fabric weight, the binder being selected so as to be thermally stable up to a temperature of at least 160.degree. C. and for limiting the water transport ability of at least the cellulose fibers. The invention also includes water-proofing membranes including a carcass formed by such fabric, which is coated and possibly impregnated with bitumen. The invention also includes the use of such a non-woven fabric as the carcass in such a water-proofing membrane.

REFERENCES:
patent: 3940540 (1976-02-01), Schmidt
patent: 4392861 (1983-07-01), Butterworth et al.
patent: 4425126 (1984-01-01), Butterworth et al.
patent: 4472243 (1984-09-01), Bondoc et al.
patent: 4545854 (1985-10-01), Gomez et al.

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