US 12,421,000 B2
Recyclable flexible films and bags for packaging flowable materials
Nicholas Farkas, Glenburnie (CA); and Lamy Chopin, Missouri City, TX (US)
Assigned to Liqui-Box Corporation
Filed by Liqui-Box Corporation, Richmond, VA (US)
Filed on Mar. 25, 2024, as Appl. No. 18/615,100.
Application 18/615,100 is a continuation of application No. 18/082,309, filed on Dec. 15, 2022, granted, now 11,970,321.
Application 18/082,309 is a continuation of application No. 17/204,414, filed on Mar. 17, 2021, granted, now 11,603,242, issued on Mar. 14, 2023.
Claims priority of provisional application 63/054,309, filed on Jul. 21, 2020.
Claims priority of provisional application 62/990,540, filed on Mar. 17, 2020.
Prior Publication US 2024/0262588 A1, Aug. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B65D 65/40 (2006.01); B32B 1/00 (2024.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B65D 75/32 (2006.01); B65D 75/58 (2006.01)
CPC B65D 65/40 (2013.01) [B32B 1/00 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); B32B 27/327 (2013.01); B65D 75/322 (2013.01); B65D 75/5877 (2013.01); B32B 2250/05 (2013.01); B32B 2270/00 (2013.01); B32B 2307/72 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); B65D 2565/385 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A co-extruded multi-layer polymeric recyclable barrier film, 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 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
(iii) an outer sealant layer comprising an ethylene/a-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.