A paperboard structure comprising a barrier coating layer

Abstract

According to an example aspect of the present invention, there is provided a paperboard structure, comprising a paperboard substrate and a barrier coating layer on the paperboard substrate, wherein the paperboard substrate comprises folding boxboard or linerboard, wherein the barrier coating layer comprises microcrystalline cellulose and a polyester derived from succinic acid and / or adipic acid, wherein the average particle size of the microcrystalline cellulose ranges from 1 μm to less than 20 μm, wherein the barrier coating layer has been prepared by extruding a composition comprising microcrystalline cellulose and said polyester on the paperboard substrate.