Patent ID: 11952720
Assignee: STORA ENSO OYJ
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  C | IPC C  D

Claim 0:
1. A heat-sealable packaging material comprising:
a paperboard substrate comprising a first side and a second side,
a first coating layer on the first side,
a first barrier coating layer on the first coating layer, the first barrier coating layer comprising pigments,
a second coating layer on the second side, and
a second barrier coating layer on the second coating layer, the second barrier coating layer comprising pigments,
wherein the first and second coating layers comprise a latex or a water-soluble polymer and the first and second barrier coating layers comprise a latex,
wherein the first coating layer and the second coating layer are free of pigments,
wherein the first barrier coating layer and the second barrier coating layer comprise pigments in an amount in a range from ≥40 wt % to ≤70 wt %, based on a dry solid content of the respective barrier coating layer, and latex in an amount in a range from ≥30 wt % to ≤60 wt %, based on the dry solid content of the respective barrier coating layer, and
wherein a grammage of each of the first and second coating layer and of the first and second barrier coating layer is in a range from ≥1 g/m2 to ≤10 g/m2.