Patent ID: 11970321
Assignee: LIQUIBOX CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 0:
1. A co-extruded multi-layer polymeric recyclable barrier film comprising five layers, comprising:
(i) an inner sealant layer comprising an ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.920 g/cm3 in an amount of at least about 50% by weight or thickness of the total inner sealant layer, wherein the inner sealant layer has a total density in the range of from about 0.910 to 0.924 g/cm3;
(ii) a first and a second interposed layer comprising an ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.920 g/cm3 in an amount of at least about 50% by weight or thickness of the first interposed layer, and an adhesive or tie resin in an amount effective to improve adhesion of the first and the second interposed layer to at least one other layers in the co-extruded multi-layer polymeric recyclable barrier film, wherein the first and the second interposed layer has a total density in the range of from about 0.910 to 0.924 g/cm3;
(iii) a core barrier layer comprising ethylene-vinyl alcohol (EVOH) copolymer comprising about 0.1% to about 10% by total weight or thickness of the co-extruded multi-layer polymeric recyclable barrier film, wherein the EVOH comprises at least 38% ethylene in the EVOH copolymer; and
(iv) an outer sealant layer comprising an ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.920 g/cm3 in an amount of at least about 50% by weight or thickness of the total outer sealant layer, wherein the outer sealant layer has a total density in the range of from about 0.910 to 0.924 g/cm3.