	US 12,240,217 B2
	Laminated product for flexible packaging, flexible packaging material, and flexible package
Hidenori Hashimoto, Chiba (JP)
Assigned to DOW-MITSUI POLYCHEMICALS CO., LTD., Tokyo (JP)
Appl. No. 17/625,403
Filed by DOW-MITSUI POLYCHEMICALS CO., LTD., Tokyo (JP)
PCT Filed Jul. 2, 2020, PCT No. PCT/JP2020/025990 § 371(c)(1), (2) Date Jan. 7, 2022, PCT Pub. No. WO2021/006172, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 2019-127838 (JP), filed on Jul. 9, 2019.
Prior Publication US 2022/0219873 A1, Jul. 14, 2022
Int. Cl. B32B 7/12 (2006.01); B32B 15/08 (2006.01); B32B 15/12 (2006.01); B32B 15/20 (2006.01); B65D 65/40 (2006.01)

CPC B32B 7/12 (2013.01) [B32B 15/08 (2013.01); B32B 15/12 (2013.01); B32B 15/20 (2013.01); B65D 65/40 (2013.01); B32B 2250/03 (2013.01); B32B 2307/31 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/7265 (2013.01); B32B 2307/732 (2013.01); B32B 2553/00 (2013.01)]

11 Claims

1. A laminated product for flexible packaging,

wherein at least a paper substrate layer, an adhesive layer, a barrier layer, and a sealant layer are laminated in this order,

the adhesive layer contains an ionomer (A) of an ethylene-unsaturated carboxylic acid copolymer,

a content of metal ions represented by X×Y/100 is equal to or more than 4.0 and equal to or less than 20.0 when a content of unsaturated carboxylic acid in an ethylene-unsaturated carboxylic acid copolymer (A1) constituting the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer is X [mass %], and a degree of neutralization of the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer is Y [mol %],

a paper constituting the paper substrate layer has a basis weight of equal to or less than 180 g/m², and

the adhesive layer is constituted of one layer.