Multilayer thermoplastic articles with improved recyclability
AssigneeAmcor Rigid Packaging USA, LLC
InventorsFrederick C. Beuerle, Dan Witham, John Brace
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Abstract
A multilayer thermoplastic article blended with hydrolytically unstable polymers and a material component for improved recyclability. The multilayer thermoplastic article having an inner layer being made of a thermoplastic material, an outer layer being made of a thermoplastic material, and an intermediate layer disposed between the inner layer and the outer layer. The intermediate layer is made of a blended material comprising 50 to 99 wt. % of a hydrolytically unstable polymer and 1 to 50 wt. % of the material component selected from the group consisting of an oxygen scavenger, an oxidizable organic polymer, a passive barrier material, Iron, Ascorbic Acid, and potassium sulfite.
Claims10
A multilayer co-injected preform for blow molding a thermoplastic container comprising:
- an inner layer being made of Polyethylene Terephthalate (PET) material as base resin;
- an outer layer being made of Polyethylene Terephthalate (PET) material as base resin;
- and
- an intermediate layer coextruded and co-injected between the inner layer and the outer layer to form the multilayer co-injected preform, the intermediate layer being made of a blended material comprising 75 to 90 wt. % of a hydrolytically unstable polymer and 10 to 25 wt. % of an oxidizable organic polymer, the hydrolytically unstable polymer is Polyglycolic Acid (PGA), the oxidizable organic polymer is selected from the group consisting of polybutadiene, oxidizable polyamide materials, or poly(alkylene ether), PTMEG;
- unsaturated hydrocarbons, MXBT, and m-xylylene-bis-(tetrahydrophthalimide), the intermediate layer further comprises a compatibilizer selected from the group consisting of maleic anhydride (MAH), MAH-grafted functional polymers, glycidyl methacrylate group (GMA), GMA-grafted functional polymers, diblock copolymers, and nonreactive polar polymers, the oxidizable organic polymer being in the presence of a transition metal catalyst,
- wherein the multilayer co-injected preform is adapted to be blow molded to a final desired shape of the thermoplastic container.
Dependencies are inferred from the claim text.