US 12,344,720 B2
Polyurethane acrylate protective display film
David Scott Thompson, Bayport, MN (US); Steven D. Solomonson, Shoreview, MN (US); Karissa Lynn Eckert, Ham Lake, MN (US); John James Stradinger, Roseville, MN (US); Catherine A. Leatherdale, Woodbury, MN (US); Peter D. Condo, Lake Elmo, MN (US); Richard J. Pokorny, Maplewood, MN (US); Ryan M. Braun, St. Paul, MN (US); Michael A. Johnson, Stillwater, MN (US); Joseph D. Rule, Woodbury, MN (US); Kevin R. Schaffer, Woodbury, MN (US); and Derek W. Patzman, Savage, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/307,572
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jun. 6, 2017, PCT No. PCT/US2017/036098
§ 371(c)(1), (2) Date Dec. 6, 2018,
PCT Pub. No. WO2017/214105, PCT Pub. Date Dec. 14, 2017.
Claims priority of provisional application 62/347,939, filed on Jun. 9, 2016.
Prior Publication US 2019/0211168 A1, Jul. 11, 2019
Int. Cl. C08J 7/048 (2020.01); B32B 7/06 (2019.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/40 (2006.01); C08F 290/06 (2006.01); C08G 18/67 (2006.01); C08J 3/24 (2006.01); C08J 5/12 (2006.01); C08J 5/18 (2006.01); C08J 7/04 (2020.01); C08J 7/043 (2020.01); C08J 7/046 (2020.01); C09D 1/00 (2006.01); C09D 7/40 (2018.01); C09D 135/02 (2006.01); C09D 151/08 (2006.01); C09D 175/16 (2006.01); G02B 1/14 (2015.01)
CPC C08J 7/048 (2020.01) [B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/308 (2013.01); B32B 27/40 (2013.01); C08F 290/067 (2013.01); C08G 18/672 (2013.01); C08J 3/24 (2013.01); C08J 5/124 (2013.01); C08J 5/18 (2013.01); C08J 7/0427 (2020.01); C08J 7/043 (2020.01); C08J 7/046 (2020.01); C09D 1/00 (2013.01); C09D 7/66 (2018.01); C09D 7/67 (2018.01); C09D 135/02 (2013.01); C09D 151/08 (2013.01); C09D 175/16 (2013.01); G02B 1/14 (2015.01); B32B 2250/03 (2013.01); B32B 2250/04 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2264/102 (2013.01); B32B 2305/72 (2013.01); B32B 2307/412 (2013.01); B32B 2307/51 (2013.01); B32B 2307/584 (2013.01); B32B 2307/732 (2013.01); B32B 2457/20 (2013.01); C08J 2375/14 (2013.01); C08J 2435/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display film having a thickness in a range from 150 to 250 micrometers and comprising:
a transparent polymeric substrate layer having a thickness in a range from 35 to 75 micrometers;
a transparent cross-linked polyurethane acrylate layer having a thickness in a range from 150 to 200 micrometers and disposed on the transparent polymeric substrate layer, the transparent cross-linked polyurethane acrylate layer having a glass transition temperature of 10 degrees Celsius or less, a Tan Delta peak value of 0.5 or greater, and a storage modulus at 23 degrees Celsius in a range of 1.02 MPa to 7.74 MPa; and
a hardcoat layer having a thickness in a range from 3 to 10 micrometers and disposed on the transparent polymeric substrate layer;
wherein the transparent polymeric substrate layer separates the transparent cross-linked polyurethane acrylate layer from the hardcoat layer, and
wherein the display film passes 100,000 cycles of dynamic folding at a bend radius of 5 mm folding away from the hardcoat layer at 0° C. with a folding rate of 20 cycles/min.