	US 11,718,721 B2
	Hard coat film and method for producing same
Takeo Suzuki, Tokyo (JP); Narihiro Iio, Tokyo (JP); Takashi Ino, Tokyo (JP); Yusuke Sugiyama, Tokyo (JP); Yasuaki Yoshida, Tokyo (JP); and Takuya Takahashi, Tokyo (JP)
Assigned to NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
Appl. No. 16/964,758
Filed by NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
PCT Filed Jan. 23, 2019, PCT No. PCT/JP2019/002017 § 371(c)(1), (2) Date Jul. 24, 2020, PCT Pub. No. WO2019/146622, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 2018-011583 (JP), filed on Jan. 26, 2018; application No. 2018-011584 (JP), filed on Jan. 26, 2018; application No. 2018-011585 (JP), filed on Jan. 26, 2018; application No. 2018-011586 (JP), filed on Jan. 26, 2018; and application No. 2018-011587 (JP), filed on Jan. 26, 2018.
Prior Publication US 2021/0054159 A1, Feb. 25, 2021
Int. Cl. B32B 27/30 (2006.01); C08J 7/04 (2020.01); C08J 7/043 (2020.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); C08J 7/18 (2006.01)

CPC C08J 7/042 (2013.01) [B32B 27/08 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); C08J 7/043 (2020.01); C08J 7/18 (2013.01); B32B 2255/10 (2013.01); B32B 2307/536 (2013.01); B32B 2307/538 (2013.01); B32B 2457/202 (2013.01); B32B 2457/204 (2013.01); C08J 2323/00 (2013.01); C08J 2347/00 (2013.01)]

4 Claims

1. A hard coat film comprising a hard coat layer containing an ionizing radiation curable resin laminated on at least one surface of a cycloolefin polymer base film via a primer layer containing a modified polyolefin resin,

wherein the primer layer is obtained by applying a primer layer paint on the cycloolefin polymer base film to form a primer layer coating film, followed by drying at 100° C. for 60 seconds to form the primer layer, the primer layer having a primer layer coating film thickness in the range of from 0.2 μm to 0.4 μm,

wherein the primer layer has an arithmetic average surface roughness (Ra) in the range of 1.9 nm to 4.8 nm, and a surface of the primer layer has a static friction coefficient in the range of 0.92 to 1.42,

wherein the surface of the primer layer has a ratio of static friction coefficient to dynamic friction coefficient (static friction coefficient/dynamic friction coefficient) in the range of 1.01 to 2.38,

wherein the primer layer has a surface free energy in the range of 23.9 mN/m to 33.8 mN/m, and

wherein the surface of the primer layer has a water contact angle of 110 degrees or less.