| 摘要 |
A method of making laminated insulated board comprising continuously removing fibrous sheets from supply rolls and subjecting the fibrous sheets to heat sufficient to raise the temperature of the sheets above the melting point of the foamed thermoplastic sheet to which the fibrous sheets are to be applied. A thermoplastic sheet is continuously removed from a roll and heated. The heated fibrous sheets are applied to the surfaces of the foamed thermoplastic sheet to form continuously moving assembly, and pressure is applied to said assembly sufficient to reduce the cross section of the assembly. Additional pressure is applied to the assembly at a point spaced longitudinally downstream from said first pressure area, and the portion of the assembly between the two pressure areas is subjected to longitudinal tension and the assembly is thereafter permitted to cool.
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