US 12,252,317 B2
Barrier film and packaging material
Satoshi Shioda, Tokyo (JP); Hidenari Kanetaka, Tokyo (JP); Kenta Konishi, Tokyo (JP); Masanori Sawada, Tokyo (JP); Ryunosuke Shiota, Tokyo (JP); Yoshihiro Kishimoto, Tokyo (JP); and Ai Okano, Tokyo (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 16/972,889
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Jun. 5, 2019, PCT No. PCT/JP2019/022271
§ 371(c)(1), (2) Date Dec. 7, 2020,
PCT Pub. No. WO2019/235509, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 2018-109547 (JP), filed on Jun. 7, 2018.
Prior Publication US 2021/0253322 A1, Aug. 19, 2021
Int. Cl. B65D 65/42 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B65D 65/40 (2006.01); C23C 14/02 (2006.01); C23C 14/08 (2006.01); C23C 14/24 (2006.01)
CPC B65D 65/42 (2013.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B65D 65/40 (2013.01); C23C 14/02 (2013.01); C23C 14/081 (2013.01); C23C 14/24 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2255/20 (2013.01); B32B 2255/26 (2013.01); B32B 2307/31 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/7246 (2013.01); B32B 2553/00 (2013.01)] 12 Claims
 
1. A barrier film comprising a barrier coat layer, an inorganic oxide vapor deposition layer, and a substrate layer in this order,
the barrier coat layer being a cured film of a barrier coat composition comprising:
a hydrolyzed product of a tetraethoxysilane;
a polyvinyl alcohol; and
a hydrolyzed product of a silane coupling agent;
that is selected from the group consisting of 3-glycidoxypropylmethyldimethoxysilane and 3-glycidoxypropyltrimethoxysilane,
wherein the surface of the barrier coat layer has a ratio of silicon atom to carbon atom (Si/C) of 1.3 to 1.8 as measured by X-ray photoelectron spectroscopy (XPS), and
wherein the 3-glycidoxypropylmethyldimethoxysilane is required to be present in the silane coupling agent in an amount of at least 50% (weight ratio) and the amount of the 3-glycidoxypropyltrimethoxysilane in the silane coupling agent is not more than 50% (weight ratio).