Waterproofing membrane and method of manufacture
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United States of America Patent
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-
Dec 2, 2003
Issued Date -
N/A
app pub date -
Jun 12, 2001
filing date -
Sep 25, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A waterproofing membrane is provided which includes a waterproof synthetic resin film presenting opposed first and second surfaces, and an inner bitumen adhesive supported on the first surface of the film. The membrane is manufactured by heating the bitumen adhesive and applying it to a web of the waterproof synthetic resin film. As such, the resulting membrane includes an adhesive possessing a coating temperature at which the adhesive can be applied to the film as a viscous liquid, and a film possessing a still higher transition temperature that permits the film to function as a substrate for the bitumen adhesive during manufacture.
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