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US 4,894,192 AGranted
Process for producing molded bodies from paper and a thermoplastic material
OwnerHans Warychinventor
Life of this patent
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Abstract
A method of producing mouldings from paper and a thermoplastics. Paper and thermoplastics waste are reduced to shavings or chips. The same are introduced into a screw extruder to melt the thermoplastics and prepared therein to be extrudable. The mixture of melted thermoplastics and paper shavings is shaped continuously into the moulding by means of an extruding tool disposed after the screw extruder. The method is used more particularly with waste of plastics-coated packing paper as feed material.
Claims14
A process for producing a molded body from paper and a thermoplastic material, comprising the steps of:
- collecting scrap material, comprising paper coated with a thermoplastic material uponn at least one side thereof, wherein the quotient ratio defined between the base weight of said paper with respect to the base weight of said thermoplastic material coated thereon is within the range of 1.0-6.5;
- shredding said scrap material comprising said paper and said thermoplastic material coated thereon into shreds;
- introducing said shreds into a screw extruder so as to melt said thermoplastic material and form an extrudable mixture;
- and
- forming said mixture of molten thermoplastic material and paper shreds into a molded body.
2 more elements
Dependencies are inferred from the claim text.