US 12,454,115 B2
Easy-open packaging bag, and easy-open laminate film and pouch having gas barrier properties
Masahiro Hongou, Yokohama (JP); and Shie Matsunaga, Yokohama (JP)
Assigned to TOYO SEIKAN CO., LTD., Tokyo (JP)
Appl. No. 17/278,059
Filed by TOYO SEIKAN CO., LTD., Tokyo (JP)
PCT Filed Sep. 12, 2019, PCT No. PCT/JP2019/035865
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/059629, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 2018-177412 (JP), filed on Sep. 21, 2018; and application No. 2018-210588 (JP), filed on Nov. 8, 2018.
Prior Publication US 2021/0347144 A1, Nov. 11, 2021
Int. Cl. B32B 3/24 (2006.01); B32B 3/26 (2006.01); B32B 27/08 (2006.01); B65D 65/40 (2006.01); B65D 75/58 (2006.01)
CPC B32B 3/26 (2013.01) [B32B 27/08 (2013.01); B65D 65/40 (2013.01); B65D 75/5888 (2013.01); B32B 2307/31 (2013.01); B65D 2565/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An easy to open packaging bag for sealing a laminated film by heat sealing, wherein the laminated film comprises an inner layer film, an intermediate layer film having an opening induction flaw formed on the intermediate layer film, and an outer layer film including a biaxially oriented film, wherein a molecular orientation angle of the outer layer film is less than or equal to 46° and more than or equal to 40°, and wherein the molecular orientation angle means the absolute value measured when the outer layer film is installed in a measurement device so that a film flow direction has an angle of 0° defined by the measurement device.