US 12,291,010 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 May 15, 2024, as Appl. No. 18/665,351.
Application 18/665,351 is a continuation of application No. 18/655,281, filed on May 5, 2024.
Application 18/655,281 is a continuation of application No. 17/961,708, filed on Oct. 7, 2022, granted, now 11,987,026.
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, issued on Dec. 27, 2022.
Claims priority of provisional application 63/030,612, filed on May 27, 2020.
Prior Publication US 2024/0300229 A1, Sep. 12, 2024
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)] 41 Claims
OG exemplary drawing
 
1. A recyclable, laminated polyolefin film structure comprising:
a first film ply comprising:
a first polyolefin film comprising one or more polyolefin polymers selected from the group consisting of polyolefin homopolymers, copolymers, and terpolymers and mixtures thereof, the first polyolefin film having a first surface and a second surface opposite the first surface; and
a coating layer disposed on the first surface of the first polyolefin film and defining an outermost surface of the laminated polyolefin film, the coating 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 second polyolefin film comprising one or more polyolefin polymers selected from the group consisting of polyolefin homopolymers, copolymers, and terpolymers and mixtures thereof, the second polyolefin film having a multilayer structure, wherein the second polyolefin film comprises a first surface and a second surface opposite the first surface, the second surface of the second polyolefin film comprising a sealant layer and defining an innermost surface of the laminated polyolefin film;
an adhesive layer interposed between the first film ply and the second film ply, the adhesive layer laminating the first film ply to the third film ply, wherein the first surface of the second polyolefin film faces the first surface of the first polyolefin film; and
wherein the first film ply, the second film ply, or both, include one or more barrier layers.