Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1976-06-23
1979-03-13
Hoag, W.E.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 465, 264 468, 264135, 264261, 264265, 264277, B29D 2704, B29D 300
Patent
active
041442962
ABSTRACT:
A process for molding in situ a polystyrene foam structure with a relatively rigid thermoplastic sheet covering a portion of the surface of the polystyrene foam. The thermoplastic sheet is cut and folded into proper shape and a heat-activated adhesive applied to the inside surface. The folded sheet is inserted into the female cavity of a mold which is then closed. Expandable polystyrene is injected into the interior of the folded sheet and heated to expand the polystyrene against the sheet and the adhesive is heat-activated to bond the sheet and polystyrene.
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Thompson, Gum Plastics, Reinhold, N.Y., (1958), pp. 60-63, 112 & 113.
Hoag W.E.
Marquis Harold L.
The Mead Corporation
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