US 11,952,188 B1
Recyclable metallized barrier films and bags for packaging flowable materials
Nicholas Farkas, Ontario (CA); and Paul Georgelos, Naperville, IL (US)
Assigned to LIQUI-BOX CORPORATION, Richmond, VA (US)
Filed by Liqui-Box Corporation, Richmond, VA (US)
Filed on Sep. 30, 2022, as Appl. No. 17/957,443.
This patent is subject to a terminal disclaimer.
Int. Cl. B65D 65/40 (2006.01); B32B 7/03 (2019.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 33/00 (2006.01); B65D 75/32 (2006.01); B65D 75/58 (2006.01)
CPC B65D 65/40 (2013.01) [B32B 7/03 (2019.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 33/00 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2307/72 (2013.01); B32B 2311/24 (2013.01); B65D 75/322 (2013.01); B65D 75/5877 (2013.01); B65D 2565/385 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A recyclable bag for packaging flowable materials comprising a recyclable metallized barrier co-extruded multi-layer polymeric film and a non-barrier co-extruded multi-layer polymeric film, wherein the metallized barrier co-extruded multi-layer polymeric film comprises:
(i) an inner sealant layer comprising an ethylene/α-olefin interpolymer fraction having a density in the range of 0.894 to 0.924 g/cm3 in an amount of at least about 40-50% by weight or thickness of the total inner sealant layer;
(ii) a core barrier layer comprising ethylene-vinyl alcohol (EVOH) comprising about 0.1% to about 10% by total weight or thickness of the co-extruded multi-layer polymeric film, wherein the EVOH comprises from about 27-55% ethylene in the EVOH copolymer; and
(iii) an outer metallized sealant layer comprising a polyethylene, or a copolymer or an ethylene/α-olefin interpolymer fraction having a density in the range of 0.894 to 0.935 g/cm3 in an amount of at least about 40-50% by weight or thickness of the total outer metallized sealant layer, and an ethylene vinyl acetate (EVA) resin.