Protective sheet material and method for making same

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/28 (2006.01) B32B 27/12 (2006.01) B32B 37/20 (2006.01) D04H 13/00 (2006.01) D06M 17/00 (2006.01) D06N 3/00 (2006.01) F16L 58/16 (2006.01)

Patent

CA 2171247

A protective sheet material of a laminate structure and a method of manufacture in which the sheet material has a plastic membrane layer joined to a layer of felt. Subsequent to the joining of the felt to the plastic membrane, the felt is saturated with petroleum wax including plasticizers and corrosion inhibitors. A second layer of felt can be joined to the opposite side of the plastic film to provide a sandwich of a plastic membrane between two layers of saturated felt. When this sheet material has been applied in an overlapping manner, there is a felt-to- felt seal at the overlap. The plastic and felt can be joined by heat fusion or by adhesives.

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