US 12,145,343 B2
Lightweight polyethylene film for aseptic packaging applications and the product resulting therefrom and the process of making the same
Mehdi Saniei, Belmont, MA (US); Mark E. Lindenfelzer, Milton, MA (US); and Eric V. Fredrickson, Lancaster, MA (US)
Assigned to MuCell Extrusion, LLC, Woburn, MA (US)
Filed by MuCell Extrusion, LLC, Woburn, MA (US)
Filed on Jul. 1, 2022, as Appl. No. 17/856,748.
Application 17/856,748 is a continuation of application No. 16/875,198, filed on May 15, 2020, granted, now 11,376,823.
Claims priority of provisional application 62/849,329, filed on May 17, 2019.
Prior Publication US 2023/0130761 A1, Apr. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/06 (2006.01); B29C 48/00 (2019.01); B29C 48/10 (2019.01); B29C 48/21 (2019.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01); B29L 23/00 (2006.01); B32B 1/08 (2006.01); B32B 5/20 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C08J 5/18 (2006.01)
CPC B32B 27/065 (2013.01) [B29C 48/0018 (2019.02); B29C 48/022 (2019.02); B29C 48/10 (2019.02); B29C 48/21 (2019.02); B32B 1/08 (2013.01); B32B 5/20 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); C08J 5/18 (2013.01); B29K 2023/065 (2013.01); B29K 2023/086 (2013.01); B29K 2105/04 (2013.01); B29L 2023/001 (2013.01); B32B 2250/03 (2013.01); B32B 2250/05 (2013.01); B32B 2266/025 (2013.01); B32B 2266/08 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7246 (2013.01); B32B 2439/70 (2013.01); C08J 2323/06 (2013.01); C08J 2329/04 (2013.01)] 20 Claims
 
1. A multilayer product comprising:
a foam layer including a plurality of cells, wherein at least 10% of the cells are closed cells, and
a plurality of solid layers on each side of the foam layer, wherein one of the solid layers on each side of the foam layer comprises HDPE, and
a solid layer comprising ethylene vinyl alcohol (EVOH) between the foam layer and one of the solid layers comprising HDPE,
wherein the product has an overall thickness equal to or greater than 8 mils, and a bending stiffness value of greater than 18 in Taber stiffness unit configuration according to TAPPI/ANSI T 489 om-15, and the ratio of the mass per unit area (the mass of a unit area of the product in gram per meter-squared (gr/m2)) over the stiffness value in Taber unit configuration is equal to or less than 13.