B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 7/06 (2006.01) B01D 71/00 (2006.01) E02D 31/04 (2006.01)
Patent
CA 2336430
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. Also, a membrane is provided having a release coating applied to an area of the film to prevent the film from bonding with the adhesive layer. The coated film is removed from the membrane to expose the underlying adhesive for overlapping adjacent membrane sheets.
Smart & Biggar
Tamko Roofing Products Inc.
LandOfFree
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