US 12,269,240 B2
Gas barrier film
Yuki Hayashi, Tokyo (JP); Junpei Hayashi, Tokyo (JP); Kenta Osawa, Tokyo (JP); and Takayuki Tani, Tokyo (JP)
Assigned to TOPPAN INC., Tokyo (JP)
Filed by TOPPAN INC., Tokyo (JP)
Filed on Jun. 1, 2022, as Appl. No. 17/829,976.
Application 17/829,976 is a continuation of application No. PCT/JP2020/045318, filed on Dec. 4, 2020.
Claims priority of application No. 2019-221361 (JP), filed on Dec. 6, 2019; application No. 2020-002830 (JP), filed on Jan. 10, 2020; and application No. 2020-083792 (JP), filed on May 12, 2020.
Prior Publication US 2022/0288902 A1, Sep. 15, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 7/12 (2006.01); B32B 27/32 (2006.01); B65D 65/40 (2006.01); B65D 65/42 (2006.01); C23C 14/08 (2006.01); C23C 14/20 (2006.01); C23C 14/30 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 7/12 (2013.01); B32B 27/32 (2013.01); B65D 65/40 (2013.01); B65D 65/42 (2013.01); C23C 14/081 (2013.01); C23C 14/20 (2013.01); C23C 14/30 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2255/26 (2013.01); B32B 2307/518 (2013.01); B32B 2307/538 (2013.01); B32B 2307/7244 (2013.01); B32B 2553/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A gas barrier film, comprising:
a substrate comprising polypropylene as a main component, the substrate consists of a surface layer and a base layer, the surface layer includes a first surface of the substrate, the base layer includes a second surface of the substrate opposite to the first surface of the substrate;
a gas barrier layer on the first surface of the substrate; and
a coating layer on the gas barrier layer, wherein
when the first surface is subjected to infrared spectroscopy, the infrared spectroscopy indicates a peak intensity I1 at 1360 to 1390 cm−1 and a peak intensity I2 at 1440 to 1480 cm−1 in a ratio satisfying formula (1):
I1/I2≤1.65  (1),
when the second surface is subjected to infrared spectroscopy, the infrared spectroscopy indicates a value of the I1/I2 ratio for the second surface greater than the value of the I1/I2 ratio for the first surface,
wherein a value of I1 indicates a quantity of propylene and a value of I2 indicates a total quantity of ethylene and propylene.