US 12,234,071 B2
Light weight corrugated packaging material
Irene Wedin, Bromma (SE); Dan Persson Norgren, Borlänge (SE); Reijo Vapa, Ii Asema (SE); Seppo Lampainen, Lahti (FI); and Kalle Vertanen, Lahti (FI)
Assigned to Stora Enso OYJ, Helsinki (FI)
Appl. No. 17/622,363
Filed by Stora Enso OYJ, Helsinki (FI)
PCT Filed Jun. 25, 2020, PCT No. PCT/IB2020/056007
§ 371(c)(1), (2) Date Dec. 23, 2021,
PCT Pub. No. WO2020/261165, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 1950794-6 (SE), filed on Jun. 26, 2019.
Prior Publication US 2022/0242635 A1, Aug. 4, 2022
Int. Cl. B32B 29/08 (2006.01); B32B 7/12 (2006.01); B32B 29/00 (2006.01); B65D 5/64 (2006.01); B65D 65/40 (2006.01)
CPC B65D 65/403 (2013.01) [B32B 7/12 (2013.01); B32B 29/005 (2013.01); B32B 29/08 (2013.01); B65D 5/64 (2013.01); B32B 2250/26 (2013.01); B32B 2255/12 (2013.01); B32B 2255/26 (2013.01); B32B 2307/558 (2013.01); B32B 2307/718 (2013.01); B32B 2439/70 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.