A barrier film for a packaging material and a packaging material

Abstract

A barrier film (1) for a paper or paperboard-based packaging material, said barrier film comprising a, MFC layer, (2) with a grammage in the range 20-100 g/m2, and a density higher than 650 kg/m3. The barrier film further comprises a PHA, dispersion coated, primer layer (3, 9) coated on at least one side of the MFC layer, wherein the primer layer has a coating weight 0.5-12 g/m2; the primer layer (3, 9) comprises a PHA type selected from the group consisting of PHB, PHBV, PHBH, P(3HB4HB), other co-polymers of PHB, other homopolymers such as PHO, PHH, P3HP, and combinations thereof; and a —a thin DLC coating layer (4) coated on the primer layer (3) which DLC coating layer (4) has a thickness of 2-100 nm, preferably 2-50 nm and most preferred 2-30 nm.

Dependencies are inferred from the claim text.