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US 12,012,699 B2Granted
Process for manufacturing components from shredded polymer-coated paper products
AssigneeChopvalue Manufacturing Ltd
InventorDirk Harste
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Abstract
The invention relates to a process for producing a thermoformable and/or embossable particle/polymer composite using a substrate S based on shredded polymer-coated paper and a thermoplastic polymer P, therewith providing a new method of recycling/upcycling paper waste. Furthermore, a process for the manufacturing of a molded article obtained from the paper-based particle/polymer composite and its use as an element in buildings or in furniture are disclosed.
Claims13
A process of manufacturing a particle/polymer composite, comprising
- (i) providing a particulate substrate S comprising
- a. shredded polymer-glued or polymer-coated paper products and
- b. at least one polymer P,
- introducing the particulate substrate S into a gas stream,
- (ii) contacting the particulate substrate S with an aqueous dispersion or solution of the polymer P having a glass transition temperature TgP in the gas stream,
- (iii) drying and depositing the particulate substrate S contacted with the polymer P in the gas stream,
- (iv) transferring the obtained deposited polymer-contacted substrate into (a) a layer, (b) a floor or (c) into a mold, and
- (v) densifying the polymer-contacted substrate at a temperature greater than or equal to TgP to form a particle/polymer composite, which is a thermoformable and/or embossable paper-based particle/polymer composite,
- wherein
- (a) substrate S comprises shredded polymer-glued or polymer-coated paper products;
- and
- (b) the at least one polymer P is thermoplastic and has a TgP≥−20° C. measured according to DIN EN ISO 11357-2 (2013-09).
9 more elements
Dependencies are inferred from the claim text.