LAMINATE AND FOOD PACKAGING MATERIAL

Abstract

A laminate includes a paper substrate, an anchor coat layer disposed at a one-surface side of the paper substrate, and a barrier coat layer disposed at a one-surface side of the anchor coat layer. The paper substrate has a density of 0.72 g/cm3 or more. The barrier coat layer contains a gas barrier polyurethane resin.

Description

Claims

1. A laminate comprising: a paper substrate;a anchor coat layer disposed at a one-surface side of the paper substrate; anda barrier coat layer disposed at a one-surface side of the anchor coat layer, wherein the paper substrate has a density of 0.72 g/cm3 or more, and the barrier coat layer contains a gas barrier polyurethane resin.

2. The laminate according to claim 1, wherein an air resistance measured in conformity with JIS P 8117 (2009) is 30000 s or more.

3. The laminate according to claim 1, wherein in the barrier coat layer, the gas barrier polyurethane resin contains a secondary reaction product of an isocyanate group-terminated prepolymer anda chain extender, andthe isocyanate group-terminated prepolymer is a primary reaction product of a polyisocyanate component containing xylylene diisocyanate and/or hydrogenated xylylene diisocyanate andan active hydrogen group-containing component containing a short chain diol having 2 to 6 carbon atoms and an active hydrogen compound having a hydrophilic group.

4. The laminate according to claim 1, wherein the barrier coat layer further contains a layered inorganic compound.

5. The laminate according to claim 1, wherein an amount of the barrier coat layer is 0.5 g/cm2 or more and 20.0 g/cm2 or less.

6. The laminate according to claim 1, wherein an amount of the anchor coat layer is 0.3 g/cm2 or more and 20.0 g/cm2 or less.

7. A food packaging material comprising the laminate according to claim 1.