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US 12,234,071 B2Granted
Light weight corrugated packaging material
AssigneeStora Enso OYJ
InventorsIrene Wedin, Dan Persson Norgren, Reijo Vapa, Seppo Lampainen, Kalle Vertanen
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Abstract
The invention discloses a corrugated packaging material with a low weight and high strength properties, which material can be recycled with the office paper recycling stream. The corrugated packaging material of the invention exhibits good strength and stiffness properties, a low wash board tendency and provides a good printing surface.
Claims12
A corrugated packaging material comprising:
- at least one liner and at least one fluted paper, wherein
- said at least one fluted paper comprises a first paper having a grammage of between 50 to 100 gsm, a total filler content of below 5 wt % and a bulk of at least 1.5 cm3/g, wherein said first paper is made from a pulp comprising 100 wt % bleached pulp, whereof at least 80 wt % is bleached mechanical pulp, and wherein
- said at least one liner comprises a second paper having a grammage of between 50 to 100, wherein said second paper is made from a pulp comprising 100 wt % bleached pulp.
A packaging unit for sheet like material comprising:
- a box having a rectangular shape and comprising a bottom panel and four side walls, and
- a lid having a rectangular shape and comprising a top wall and four side walls,
- wherein the box and the lid are made from a corrugated packaging material comprising:
- at least one liner and at least one fluted paper,
- wherein said at least one fluted paper comprises a first paper having a grammage of between 50 to 100 gsm, a total filler content of below 5 wt % and a bulk of at least 1.5 cm3/g,
- wherein said first paper is made from a pulp comprising 100 wt % bleached pulp, whereof at least 80 wt % is bleached mechanical pulp,
- wherein said at least one liner comprises a second paper having a grammage of between 50 to 100, and
- wherein said second paper is made from a pulp comprising 100 wt % bleached pulp.
5 more elements
Dependencies are inferred from the claim text.