Asphalt water-proofing material
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United States of America Patent
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-
Oct 28, 1980
Grant Date -
N/A
app pub date -
Jul 20, 1979
filing date -
Jul 24, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An asphalt water-proofing material comprising a core impregnated with petroleum asphalt. The core is made of composite material including a non-woven fabric layer formed of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer. The non-woven fabric and woven or knitted fabric layers are connected together by needle-punching whereby the long filaments of the non-woven fabric layer are forced into the woven or knitted fabric layer to integrally connect these layers to form said core.
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