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US 10,850,901 B2Granted
High-strength fluting from NSSC pulp
AssigneeBillerudkorsnas AB
InventorFredrik Nordstrom
Life of this patent
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Abstract
There is provided a method of producing a containerboard, comprising the step of pressing a web formed from a pulp comprising NSSC pulp in an extended nip press, such as a shoe press, wherein the line load in the extended nip press is above 1200 kN/m. Further, there is provided a corrugated board comprising a liner and a fluting, wherein the fluting is formed from a pulp comprising NSSC pulp, the density of the fluting is above 725 kg/m3 and the geometric SCT index (ISO 9895) of the fluting is above 37 Nm/g.
Claims8
Corrugated board comprising:
- a liner;
- and
- a fluting, wherein the fluting is formed from a pulp comprising NSSC pulp, the density according to ISO 534 of the fluting is above 725 kg/m3, the geometric SCT index according to ISO 9895 of the fluting is above 37 Nm/g, the SCT index in CD of the fluting is above 28 Nm/g, and the CCT index according to SCAN P-42 of the fluting is at least 25 Nm/g.
Dependencies are inferred from the claim text.