Non-woven fabric, a bituminous water-proofing membrane built up on it, and the use of the fabric as a carcass in such a membrane
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United States of America Patent
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-
Oct 14, 1986
Grant Date -
N/A
app pub date -
Dec 7, 1984
filing date -
Dec 9, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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