US 11,718,075 B2
High clarity, recyclable, polyethylene-based packaging films
Alexander David Jones, Newport, KY (US); Amir Saffar, Montreal (CA); Patrick Allen Batten, New London, WI (US); Louann Susan Mueller, Kaukauna, WI (US); Kylie Noel Diges, Appleton, WI (US); and Seyed Hesamoddin Tabatabaei, Mason, OH (US)
Assigned to ProAmpac Holdings Inc., Cincinnati, OH (US)
Filed by ProAmpac Holdings Inc., Cincinnati, OH (US)
Filed on Jul. 23, 2021, as Appl. No. 17/384,175.
Claims priority of provisional application 63/056,342, filed on Jul. 24, 2020.
Prior Publication US 2022/0024191 A1, Jan. 27, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 27/32 (2006.01); B65D 65/40 (2006.01); B32B 27/30 (2006.01); B32B 27/34 (2006.01); B65D 65/42 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B65D 65/40 (2013.01); B65D 65/42 (2013.01); B32B 2250/03 (2013.01); B32B 2250/05 (2013.01); B32B 2250/242 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2307/31 (2013.01); B32B 2307/412 (2013.01); B32B 2307/414 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/7246 (2013.01); B32B 2553/00 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A recyclable polyethylene-based packaging film, comprising:
a coextruded web comprising:
a skin layer comprising an optically transparent polyethylene polymer;
a heat sealant layer forming an innermost layer of the packaging film, the heat sealant layer comprising a polyethylene polymer;
a moisture barrier layer disposed intermediate the skin layer and the heat sealant layer; and
an energy-cured coating disposed on the skin layer of the coextruded web and forming an outermost surface of the packaging film, wherein the energy-cured coating has a coating weight which is effective to impart a property in the packaging film selected from reduced susceptibility to melting, reduced susceptibility to deforming, or both, and
wherein a melting temperature of the outermost surface of the packaging film is at least 100 degrees Celsius higher than a melting temperature of the innermost layer of the packaging film.
 
14. A recyclable polyethylene-based packaging film, comprising:
a coextruded web comprising:
a skin layer comprising an optically transparent polyethylene polymer;
a heat sealant layer forming an innermost layer of the packaging film, the heat sealant layer comprising a polyethylene polyolefin polymer;
a gas barrier layer disposed intermediate the skin layer and the heat sealant layer;
a first moisture barrier layer interposed between the skin layer and the gas barrier layer; and
a second moisture barrier layer interposed between the gas barrier layer and the heat sealant layer; and
an energy-cured coating disposed on the skin layer of the coextruded web and forming an outermost surface of the packaging film, wherein the energy-cured coating has a coating weight which is effective to impart a property in the packaging film selected from reduced susceptibility to melting, reduced susceptibility to deforming, or both; and
wherein a melting temperature of the outermost surface of the packaging film is at least 100 degrees Celsius higher than a melting temperature of the innermost layer of the packaging film.