GAS BARRIER LAMINATE AND PACKAGING
A gas barrier laminate having a laminate structure including a paper base material and a transparent vapor-deposited layer, in which the paper base material has a maximum light transmittance of 0.85% or more for a light beam having at least one wavelength among light beams having a wavelength within a range of 300 nm to 800 nm.
1 . A gas barrier laminate having a laminate structure comprising:
a paper base material; and
a transparent vapor-deposited layer,
wherein the paper base material has a maximum light transmittance of 0.85% or more for a light beam having at least one wavelength among light beams having a wavelength within a range of 300 nm to 800 nm.
2 . The gas barrier laminate according to claim 1 , wherein the paper base material is one selected from the group consisting of glassine paper, paraffin paper and parchment paper.
3 . The gas barrier laminate according to claim 1 , further comprising:
an anchor coat layer provided between the paper base material and the transparent vapor-deposited layer; and
an overcoat layer provided so as to cover the transparent vapor-deposited layer.
4 . The gas barrier laminate according to claim 3 , wherein the anchor coat layer has a thickness of 1 μm to 5 μm.
5 . The gas barrier laminate according to claim 3 , wherein the overcoat layer has a thickness of 2 μm to 10 μm.
6 . The gas barrier laminate according to claim 1 , wherein the transparent vapor-deposited layer has a thickness of 30 nm to 100 nm.
7 . The gas barrier laminate according to claim 1 ,
wherein the paper base material has a thickness of 30 μm to 100 μm, and
a proportion of a thickness of the paper base material based on a total thickness of the gas barrier laminate is 70% or more.
8 . A packaging bag including the gas barrier laminate according to claim 1 .
9 . The packaging bag according to claim 8 , further comprising a bent part.
10 . The gas barrier laminate according to claim 3 , wherein the overcoat layer contains a polyolefin having a polar group.
11 . The gas barrier laminate according to claim 3 , wherein the anchor coat layer contains a polyolefin having a polar group.
12 . The gas barrier laminate according to claim 3 , wherein the anchor coat layer contains a polyvinyl alcohol-based resin.