US 11,987,026 B2
Recyclable laminated polyolefin-based film structures
Sophia R. Luettke, Cincinnati, OH (US); Joseph J. Buchanan, Appleton, WI (US); Seyed Hesamoddin Tabatabaei, Mason, OH (US); Daniel T. Senter, Crestwood, MO (US); Kevin L. Lemmons, Jackson, MO (US); Brian J. Schiermeier, White House, TN (US); and Amir Saffar, Laval (CA)
Assigned to ProAmpac Holdings Inc., Cincinnati, OH (US)
Filed by PROAMPAC HOLDINGS INC., Cincinnati, OH (US)
Filed on Oct. 7, 2022, as Appl. No. 17/961,708.
Application 17/961,708 is a continuation in part of application No. 17/332,658, filed on May 27, 2021, granted, now 11,535,013.
Claims priority of provisional application 63/030,612, filed on May 27, 2020.
Prior Publication US 2023/0046183 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/32 (2006.01); B32B 37/12 (2006.01)
CPC B32B 27/32 (2013.01) [B32B 37/12 (2013.01); B32B 2037/1223 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2307/4023 (2013.01); B32B 2323/043 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laminated polyolefin-based film structure comprising:
a first film ply comprising:
a first layer formed of a polyolefin-based film containing at least 90% by weight polyolefin homopolymers, copolymers, or terpolymers and less than 10% by weight other polymer compositions, the first layer having a first surface and a second surface opposite the first surface; and
a second layer disposed on the first surface of the first layer, the second layer defining an outermost surface of the laminated polyolefin-based film structure, the second layer comprising a two-part coating, the two-part coating formed of a cured coating composition comprising a cross-linkable binder and a cross-linking agent, wherein the cross-linkable binder comprises a polymer selected from the group consisting of nitrocelluloses, polyesters, and polyurethanes, and wherein a cross-linking agent comprises an isocyanate compound having at least one isocyanate group; and
a second film ply comprising:
a third layer formed of a polyolefin-based film containing at least 90% by weight polyolefin homopolymers, copolymers, or terpolymers and less than 10% by weight other polymer compositions, the third layer having a first surface and a second surface opposite the first surface, the second surface of the third layer defining an innermost surface of the laminated polyolefin-based film structure opposite the outermost surface;
a first adhesive layer intermediate the first film ply and the second film ply, the first adhesive layer coupling the first film ply to the second film ply, wherein the first surface of the third layer faces toward the second surface of the first layer; and
a printed layer disposed intermediate the first layer and the third layer.