초록 ▼

This invention pertains to a thermal insulating laminate which comprises a rigid, closed cell foam core, suitably a polyurethane foam core, and a porous fabric or paper sheet adhered to at least one surface of the core. The porous sheet layer is impregnated with polymeric material having the same co

This invention pertains to a thermal insulating laminate which comprises a rigid, closed cell foam core, suitably a polyurethane foam core, and a porous fabric or paper sheet adhered to at least one surface of the core. The porous sheet layer is impregnated with polymeric material having the same composition as the core during the lamination process. This invention also pertains to the modification in which a metallic foil is bonded to the porous sheet by means of a flame-resistant and low smoke-producing adhesive. Preferably, there is also a network of glass fiber strands between the sheet and the foil. The laminate can be used as insulating board under built-up roofs, for wall sheathing in building construction, and all other normal applications for rigid polyurethane insulation. The laminate incorporating the foil-glass layers can also be utilized in situations where additional dimensional stability and additional flame resistance are required.

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