Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1980-03-13
1982-06-01
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 462, 264 53, 264DIG2, 425224, 425817C, B29D 2704
Patent
active
043327540
ABSTRACT:
A method for the continuous fabrication of blankets or sheets of expanded phenolic resin displaying a hard skin on each of their sides, according to which a mixture, comprising in particular a resole resin, a blowing agent and a hardening catalyst is placed on an essentially flat surface of a moving element, is brought to foam and is conformed between two parallel surfaces entrained in the same direction, the lower surface being situated in the same plane as the surface of the moving component, characterized in that, in a first stage, the mixture is brought into free air towards the conformation surfaces by being submitted to a heating so as to have it expand and then the expanded mass is conformed by exerting a pressure on its free side, at the moment of entry between the conformation surfaces, and the hardening of the resin is completed while maintaining the pressure and the heating.
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Barthe Marie P.
Frumen Bernard
Have Serge
Meunier Jean P.
Anderson Philip
Barron Alexis
Child, Jr. John S.
Saint-Gobain Industries
Synnestvedt John T.
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