Processes of forming an insulated foam board system
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United States of America Patent
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Apr 22, 2003
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app pub date -
Jun 12, 2000
filing date -
Aug 18, 1998
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Abstract
An insulated foam board system of the present invention comprises a first layer, a second layer and a central layer. The first layer is made from a material selected from the group consisting of alkenyl aromatic polymers, polypropylenes, polyethylene terephthalates, polyethylenes and combinations thereof. The second layer is made from a material selected from the group consisting of alkenyl aromatic polymers, polypropylenes, polyethylene terephthalates, polyethylenes and combinations thereof. The central layer is located between the first layer and the second layer. The second layer is bonded to the first layer and the third layer. The central layer is made from a material selected from the group consisting of crystal polystyrene, impact polystyrene, polyethylene terephthalate and combinations thereof.
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