Gas-barrier laminate and packaging bag
AssigneeToppan Holdings Inc.
InventorsRika Ishii, Junichi Kaminaga, Yoshiki Koshiyama, Yumiko Kojima
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Abstract
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, in which the gas barrier laminate includes a layer including a polyvinyl alcohol-based resin between the paper substrate and the anchor coat layer or between the anchor coat layer and the vapor-deposited layer.
Claims17
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,
- wherein the gas barrier laminate further comprises a resin layer that includes a polyvinyl alcohol-based resin between the paper substrate and the anchor coat layer or between the anchor coat layer and the vapor-deposited layer, and
- wherein a thickness of the anchor coat layer is 1 μm or more and 5 μm or less, and a thickness of the resin layer is 1 μm or more and 5 μm or less.
A gas barrier laminate comprising, in following order:
- a paper substrate;
- a resin layer including a polyvinyl alcohol-based resin;
- 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,
- wherein a thickness of the anchor coat layer is 1 μm or more and 5 μm or less, and a thickness of the resin layer is 1 μm or more and 5 μm or less,
- wherein the resin layer has a first surface that contacts the paper substrate and a second surface that contacts the anchor coat layer, and
- wherein the anchor coat layer has a first surface that contacts the resin layer and a second surface that contacts the vapor-deposited layer.
A gas barrier laminate comprising, in following order:
- a paper substrate;
- an anchor coat layer including a first polyolefin having a polar group;
- a resin layer including a polyvinyl alcohol-based resin;
- a vapor-deposited layer;
- and
- an overcoat layer including a second polyolefin having a polar group,
- wherein a thickness of the anchor coat layer is 1 μm or more and 5 μm or less, and a thickness of the resin layer is 1 μm or more and 5 μm or less,
- wherein the anchor coat layer has a first surface that contacts the paper substrate and a second surface that contacts the resin layer, and
- wherein the resin layer has a first surface that contacts the anchor coat layer and a second surface that contacts the vapor-deposited layer.
Dependencies are inferred from the claim text.