Waterproofing membrane and method of manufacture
AssigneeTamko Roofing Products, Inc.
InventorAaron R. Phillips
Life of this patent
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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.
Claims23
A waterproofing membrane comprising:
- 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 adhesive possessing a coating temperature at which the adhesive is applied to the film as a liquid,
- the synthetic resin film possessing a transition temperature above which the dimensional stability of the film and the ability of the film to support a continuous load is substantially reduced relative to the dimensional stability and ability of the film to support a continuous load at room temperature, the transition temperature being higher than the coating temperature of the adhesive.
A waterproofing membrane comprising:
- a waterproof synthetic resin film having a thickness of less than about 3 mils, the film presenting opposed first and second surfaces and laterally spaced side edges;
- a bitumen adhesive supported on the first surface of the film and presenting an exposed surface and laterally spaced side edges that are coextensive with the side edges of the film, the adhesive possessing a coating temperature at which the adhesive is applied to the film as a liquid;
- and
- a removable release liner covering the exposed surface of the adhesive;
- the synthetic resin film possessing a transition temperature above which the dimensional stability of the film and the ability of the film to support a continuous load is substantially reduced relative to the dimensional stability and ability of the film to support a continuous load at room temperature, the transition temperature being higher than the coating temperature of the adhesive.
A waterproofing membrane comprising:
- a waterproof synthetic film presenting opposed first and second surfaces, a bitumen adhesive supported on the first surface of the film and having an opposite bitumen adhesive surface therefrom, the adhesive possessing a coating temperature at which the adhesive is applied to the film as a liquid;
- a release liner disposed on the opposite surface of the adhesive;
- and
- the synthetic film possessing a transition temperature above which the dimensional stability of the film and the ability of the film to support a continuous load is substantially reduced relative to the dimensional stability and ability of the film to support a continuous load at room temperature, the transition temperature being higher than the coating temperature of the adhesive.
Dependencies are inferred from the claim text.