US 11,851,539 B2
Lamination film and adhesive therefor
Felipe Martinez Barreneche, Houston, TX (US); Elkin David Cardona Jimenez, Medellin, CO (US); Juan Carlos Casarrubias, Mexico City (MX); and Jie Wu, Lake Jackson, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); Dow Quimica de Colombia SA, Bogota (CO); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 17/311,319
Filed by DOW GLOBAL TECHNOLOGIES LLC; DOW QUIMICA DE COLOMBIA S.A.; and ROHM AND HAAS COMPANY
PCT Filed Oct. 25, 2019, PCT No. PCT/US2019/058094
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/117399, PCT Pub. Date Jun. 11, 2020.
Claims priority of provisional application 62/774,989, filed on Dec. 4, 2018.
Prior Publication US 2022/0017706 A1, Jan. 20, 2022
Int. Cl. C08J 5/12 (2006.01); B32B 1/00 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/16 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 37/12 (2006.01); B65D 65/40 (2006.01); C08J 5/18 (2006.01)
CPC C08J 5/124 (2013.01) [B32B 1/00 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/16 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 37/12 (2013.01); B65D 65/40 (2013.01); C08J 5/18 (2013.01); B32B 2307/714 (2013.01); B32B 2439/46 (2013.01); C08J 2323/26 (2013.01); C08J 2367/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A film structure comprising:
(a) at least one functionalized film layer, wherein the at least one functionalized film layer comprises a polar-reactive group polyolefin layer used as an internal lamination layer in the film structure; wherein the polar-reactive group polyolefin layer consists of a physical blend of an ethylene vinyl acetate polar copolymer and a grafted ethylene polar copolymer; and wherein the polar-reactive group has a functional group that comprises 0.15 wt. % to 1.5 wt % based on the total weight of the polyolefin layer; and
(b) a lamination adhesive composition present on, and in contact with, a least a portion of a surface of the internal layer;
wherein the chemical resistance value of the lamination adhesive composition is a bond strength sufficient for the laminate to withstand a measured adhesion force of at least 200 g-f/in when the laminate is subjected to a delamination test accompanied by a failure mode of tearing or no failure mode.