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US 4,968,463 AGranted
Process for making molded or extruded objects from waste containing plastic materials
AssigneeOTVD (Omnium de Traitements et de Valorisation des dechets)
InventorJean-Pierre Levasseur
Life of this patent
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Abstract
A process is provided for producing extruded or molded objects from waste containing plastic materials. The process includes the following steps: preliminary physical treatment, optional drying, preheating to a temperature of from 80.degree. to 160.degree. C., mixing at a temperature of from 120.degree.-250.degree. C., and injection molding or extrustion.
Claims12
A process for making extruded or molded objects from waste containing primarily a mixture of thermoplastic materials, comprising:
- preliminary physical processing of said waste;
- determining the water content of said waste and if the water content is above about 8% by weight, drying said waste materials to a water content of not more than about 8% by weight;
- preheating said waste to a temperature of from 80 to 160.degree. C.;
- kneading said waste at a temperature of from 120 to 250.degree. C.;
- and
- molding said waste by injection molding or extrusion to form a final product.
3 more elements
Dependencies are inferred from the claim text.