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US 12,753,555 B2Granted
Polylactide formulation for improved extrusion processing
AssigneeWestRock MWV, LLC
InventorsRahul Bhardwaj, Chitai C. Yang, Justin L. Bennett, Courtney R. Johnson
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Abstract
A paperboard structure includes a paperboard substrate having a first surface and an opposed second surface. A biopolymer coating is applied by extrusion or co-extrusion to at least one of the first surface and the second surface. The biopolymer coating includes an inorganic melt curtain stabilizer, a polylactide resin having a melt flow index, and an organic polymeric chain extender.
Claims20
A paperboard structure comprising:
- a paperboard substrate having a first surface and an opposed second surface;
- and
- a biopolymer coating applied by extrusion or co-extrusion to at least one of the first surface and the second surface, wherein the biopolymer coating comprises:
- an inorganic melt curtain stabilizer;
- a first polylactide resin having a first melt flow index;
- a second polylactide resin having a second melt flow index different from the first melt flow index;
- and
- an organic polymeric chain extender.
5 more elements
A method for manufacturing a paperboard structure, the method comprising:
- applying by extrusion or co-extrusion a biopolymer coating to at least one of a first surface and an opposed second surface of a paperboard substrate, wherein the biopolymer coating comprises:
- an inorganic melt curtain stabilizer;
- a first polylactide resin having a first melt flow index;
- a second polylactide resin having a second melt flow index different from the first melt flow index;
- and
- an organic polymeric chain extender.
3 more elements
Dependencies are inferred from the claim text.