Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1993-03-10
1993-11-30
Lesmes, George F.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283084, 4283166, 521 54, 521149, 521 55, 264 454, 264DIG7, B32B 306, B32B 514, B32B 326
Patent
active
052663965
ABSTRACT:
A method for recycling expanded polystyrene foam materials. Unexpanded virgin polystyrene beads having pentane gas contained therein are thermally expanded to produce a supply of expanded beads. Next, a supply of used expanded polystyrene foam is obtained and ground into small portions, preferably of the same size as the expanded beads. The used polystyrene foam pieces are then placed in contact with pentane gas. The expanded beads and the pentane-treated foam pieces are thereafter combined to form a mixture which preferably contains not less than about 50% by weight foam pieces. The mixture is then placed in a mold, followed by the application of heat and pressure thereto in order to produce a final product with a high degree of structural integrity. The pentane gas treatment of the foam pieces enables the fusion thereof to the expanded beads, resulting in a highly durable product.
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Copenheaver Blaine
Hewlett--Packard Company
Lesmes George F.
LandOfFree
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