US 12,333,099 B2
Optical film, laminated film, and touch panel
Daisuke Inoue, Kanagawa (JP); and Yu Isobe, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Mar. 9, 2021, as Appl. No. 17/196,496.
Application 17/196,496 is a continuation of application No. PCT/JP2019/033848, filed on Aug. 29, 2019.
Claims priority of application No. 2018-184339 (JP), filed on Sep. 28, 2018.
Prior Publication US 2021/0200348 A1, Jul. 1, 2021
Int. Cl. B32B 7/12 (2006.01); B32B 7/023 (2019.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/36 (2006.01); G06F 3/041 (2006.01); H01B 5/14 (2006.01)
CPC G06F 3/041 (2013.01) [B32B 7/023 (2019.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/36 (2013.01); H01B 5/14 (2013.01); B32B 2255/26 (2013.01); B32B 2264/1021 (2020.08); B32B 2264/1024 (2020.08); B32B 2307/538 (2013.01); B32B 2457/208 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical film comprising:
a substrate film; and
an adhesion-facilitating layer arranged on at least one surface of the substrate film,
wherein the adhesion-facilitating layer contains a resin, silica particles, and metal oxide particles other than the silica particles;
in a case where, in a vertical cross section of the adhesion-facilitating layer, a region to a height corresponding to 50% of an average film thickness of the adhesion-facilitating layer from a substrate film side of the adhesion-facilitating layer is defined as a lower region, and a region excluding the lower region of the adhesion-facilitating layer is defined as an upper region, a ratio of a percentage A of an area derived from the metal oxide particles in a total area of the lower region to a percentage B of an area derived from the metal oxide particles in a total area of the upper region is 1.05 or more;
the surface of the adhesion-facilitating layer opposite to the substrate film side has an arithmetic mean roughness Ra of 10 nm or more and 19 nm or less;
a mass ratio of the metal oxide particles to the silica particles is 9.0 to 11.0; and
a content of the metal oxide particles in the adhesion-facilitating layer is 3.0% to 6.0% by volume with respect to the total volume of the adhesion-facilitating layer.