GAS-BARRIER LAYERED BODY AND PACKAGING BODY
Provided is a gas barrier laminate including: a paper substrate; an anchor coat layer including a first polyolefin having a polar group; a vapor-deposited layer; and an overcoat layer including a second polyolefin having a polar group, in order.
1 . A gas barrier laminate comprising, in following order:
a paper substrate;
an anchor coat layer including a first polyolefin having a polar group;
a vapor-deposited layer; and
an overcoat layer including a second polyolefin having a polar group.
2 . The gas barrier laminate according to claim 1 , wherein the first polyolefin having a polar group has at least one selected from a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group, and a carboxylic acid ester.
3 . The gas barrier laminate according to claim 1 , wherein the second polyolefin having a polar group has at least one selected from a carboxyl group, a salt of a carboxyl group, a carboxylic acid anhydride group, and a carboxylic acid ester.
4 . The gas barrier laminate according to claim 1 , wherein the first polyolefin having a polar group is a copolymer of an acrylic acid ester and maleic anhydride.
5 . The gas barrier laminate according to claim 1 , wherein the first polyolefin having a polar group is an ethylene-vinyl acetate copolymer.
6 . The gas barrier laminate according to claim 1 , wherein the first polyolefin having a polar group is an ethylene-glycidyl methacrylate copolymer.
7 . The gas barrier laminate according to claim 1 , wherein the second polyolefin having a polar group is a copolymer of an acrylic acid ester and maleic anhydride.
8 . The gas barrier laminate according to claim 1 , wherein the second polyolefin having a polar group is an ethylene-vinyl acetate copolymer.
9 . The gas barrier laminate according to claim 1 , wherein the second polyolefin having a polar group is an ethylene-glycidyl methacrylate copolymer.
10 . The gas barrier laminate according to claim 1 , wherein a thickness of the anchor coat layer is 1 µm or more.
11 . The gas barrier laminate according to claim 1 , wherein a weight of paper is 50% by mass or more based on the entire gas barrier laminate.
12 . A packaging bag comprising the gas barrier laminate according to claim 1 .
13 . The packaging bag according to claim 12 , having a folding part.