Process for regulating the porosity and printing properties of paper by use of colloidal precipitated calcium carbonate, and paper containing such colloidal precipitated calcium carbonate
AssigneeJ. M. Huber Denmark ApS
InventorsKlaus Akilles Lunden, Ib Attrup, Jens Toftelund Madsen
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Abstract
The invention relates to a process for regulating the porosity and printing properties of paper, in particular uncoated wood-containing paper such as SC-paper, wherein a sufficient quantity of colloidal PCC having a BET surface area of 10-100 m2/g is used as a filter in the paper to achieve a desired porosity of the paper; as well as paper containing colloidal PCC as filler, and a pigment mixture suitable for paper manufacture and containing colloidal PCC.
Claims20
A process for regulating the porosity and printing properties of uncoated wood-containing paper, having at least 10% by weight of the pulp being lignin-containing pulp, the process comprising using a sufficient quantity of colloidal precipitated calcium carbonate (PCC) having a BET surface area of 10-100 m2/g as a filler to achieve a desired porosity of the paper.
An uncoated wood-containing paper in which at least 10% by weight of the pulp is lignin-containing pulp, and wherein said paper further contains colloidal precipitated calcium carbonate (PCC).
Dependencies are inferred from the claim text.