GAS BARRIER LAMINATE AND PACKAGING MATERIAL PROVIDED THEREWITH
The gas barrier laminate includes a paper base, a first resin layer, a deposition layer, and a second resin layer laminated on each other, wherein the paper base, the first resin layer, the deposition layer, and the second resin layer are laminated in order, a thickness of the paper base is 20 μm or more and 40 μm or less, and a density of the paper base is 0.8 g/cm 3 or more and 1.5 g/cm 3 or less.
1 . A gas barrier laminate comprising:
a paper base, a first resin layer, a deposition layer, and a second resin layer laminated on each other,
wherein the paper base, the first resin layer, the deposition layer, and the second resin layer are laminated in order, and
wherein a thickness of the paper base is 20 μm or more and 40 μm or less, and a density of the paper base is 0.8 g/cm 3 or more and 1.5 g/cm 3 or less.
2 . The gas barrier laminate according to claim 1 ,
wherein the second resin layer is a layer including a polyolefin resin having at least one of 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 a thickness of the deposition layer is 30 nm or more and 100 nm or less.
4 . The gas barrier laminate according to claim 1 ,
wherein the deposition layer is any of an aluminum layer, a silicon oxide layer, and an aluminum oxide layer.
5 . The gas barrier laminate according to claim 1 ,
wherein a thickness of the second resin layer is 2 μm or more and 10 μm or less.
6 . The gas barrier laminate according to claim 1 ,
wherein a thickness of the second resin layer is 5 μm or more and 10 μm or less, and
wherein the thickness of the paper base is 20 μm or more and 37 μm or less.
7 . The gas barrier laminate according to claim 1 ,
wherein the density of the paper base is 1.0 g/cm 3 or more and 1.5 g/cm 3 or less.
8 . A wrapping material comprising the gas barrier laminate according to claim 1 .
9 . The gas barrier laminate according to claim 1 ,
wherein a weight of the paper base is 50 wt % or more based on the entire of the gas barrier laminate.
10 . The gas barrier laminate according to claim 1 ,
wherein an initial water vapor permeability of the gas barrier laminate measured by an isobaric method under the condition of a temperature of 40° C. and a relative humidity of 90% is 10 g/m 2 ·day or less.
11 . The gas barrier laminate according to claim 1 ,
wherein a water vapor permeability of the gas barrier laminate after bending and measured by an isobaric method under the condition of a temperature of 40° C. and a relative humidity of 90% is 5 g/m 2 ·day or less.