A packaging material comprising a polymer coating
AssigneeStora Enso OYJ
InventorsKimmo Nevalainen, Inkeri Perttu-Ukonaho, Esa Suikkanen, Minna Vuorimaa, Timo Lankinen, Anna Veijalainen
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Abstract
The present invention relates to a packaging material comprising a paperboard substrate comprising a first and a second side, an extrusion coated polymer layer attached to the first side, which polymer layer comprises polyethylene (PE) with a melt index in the range of 7-10 g/10 min, as measured using ASTM D1238, wherein the polymer layer has a grammage of less than 12 gsm, preferably less than 10 gsm. The invention further relates to a method of producing such a packaging material and a cup being made from or comprising said packaging material.
Claims16
A packaging material comprising:
- a paperboard substrate comprising a first side and a second side,
- an extrusion coated polymer layer attached to the first side,
- wherein the extrusion coated polymer layer comprises polyethylene (PE) with a melt index in a range of 7-10 g/10 min, as measured using ASTM D1238,
- wherein the extrusion coated polymer layer has a grammage of less than 12 gsm.
A method for manufacturing a packaging material, comprising:
- a) providing a paperboard substrate comprising a first side and a second side,
- b) applying a layer of a molten polymeric resin to the first side by extrusion coating to form a first polymer layer with a grammage of less than 12 gsm, said molten polymeric resin essentially consisting of a polyethylene with a melt index in a range of 7-10 g/10 min, as measured using ASTM D1238, and,
- c) allowing the first polymer layer to cool down and solidify.
Dependencies are inferred from the claim text.