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US 10,704,199 B2Granted
Use of cellulosic fibre pulp
AssigneeSmurfit Kappa Paper Holdings France
InventorsJean Henaff, Ronald Bredemo
Life of this patent
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Abstract
Use of cellulosic fibre pulp having a Schopper-Riegler number according to ISO 5267-1 of about 70 or more as an additive to papermaking pulp for enhancing compressive strength of paper or board manufactured from the papermaking pulp. A process for enhancing compressive strength of paper or board manufactured from a papermaking pulp, comprising use of a cellulosic fibre pulp having a Schopper-Riegler number according to ISO 5267-1 of about 70 or more as a component of the papermaking pulp.
Claims3
A process for manufacturing paper or board, comprising:
- preparing a cellulosic fibre pulp by beating or refining a woodpulp or recycled fibre pulp to obtain a Schopper-Riegler number according to ISO 5267-1 of 70 or more;
- using the cellulosic fibre pulp having a Schopper-Riegler number according to ISO 5267-1 of about 70 or more as a component of a papermaking pulp, wherein the cellulosic fibre pulp is used in the papermaking pulp in such amount that fibre originating from the cellulosic fibre pulp constitutes up to about 25 wt %, determined on a dry matter basis, of the fibre composition of the papermaking pulp and/or of the paper or board to be manufactured;
- and
- manufacturing paper or board from the papermaking pulp.
1 more element
Dependencies are inferred from the claim text.