Composite insulation/underlayment sheet and method of...

B - Operations – Transporting – 32 – B

Patent

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B32B 5/18 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2280255

A composite insulation and/or underlayment sheet is provided by continuously extruding a pair of cover laminae comprising a styrenic polymer, and simultaneously extruding between the freshly extruded cover laminae an inner lamina of a material selected from the group consisting of high-impact polystyrene, butadiene styrene, metallocene-catalyzed polymers, and acid copolymers of ethylene, formed with or without discontinuities, the cover laminae being bonded immediately to the inner lamina.

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