Method for making laminates comprising a hard foam layer and a f

Details Method for making laminates comprising a hard foam layer and a f Method for making laminates comprising a hard foam layer and a f

1980-06-30

1982-02-23

Anderson, Philip

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264257, 264321, 4283193, B32B 518, B32B 516, B29D 2700

Patent

active

043169341

ABSTRACT:
What is disclosed is a method for making a laminate comprising a hard foam layer and a fiber-reinforced synthetic resin layer, which method comprises heating and compressing, in two steps, at least one layer of a high-temperature resistant hard foam and at least one layer of a fiber-containing synthetic resin capable of flowing and of hardening when heated, wherein in a first step, the temperature and pressure employed are sufficient for initiating flow of the synthetic resin and are applied until the synthetic resin has completed flowing, said pressure having a value exceeding the compressive strength of the foam at the temperature employed but not exceeding its compressive strength at room temperature and, wherein in a second step, at a temperature and for a time sufficient to complete hardening of the synthetic resin, pressure is applied which does not exceed the compressive strength of the foam at the temperature used.

REFERENCES:
patent: 3844876 (1974-10-01), Wilson
patent: 3906137 (1975-09-01), Bauer
patent: 4034137 (1977-07-01), Hofer
patent: 4139685 (1979-02-01), Schroeder
patent: 4188428 (1980-02-01), Wolf

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