US 6,551,454 B1 · Method for producing coated calendered paper

Abstract

Several paper grades are finished in a supercalender (1) or similar calender types in order to increase the smoothness, gloss and other properties of the paper. According to the invention, the method for producing coated and calendered paper or paper board, comprises steps of coating a sheet of paper or paper board and bringing the sheet containing water to a calender (1), leading the sheet in at least one nip formed by two rolls (18, 19) of the calender (1) and imposing simultaneously heat and pressure on the sheet in the nip in order to treat the surface of the web, whereby also water is removed from the sheet, removing water from the sheet before winding in such an extent that the moisture content of the sheet is adjusted to a value of 4.0% or less, leading the treated sheet to a winder (21), and winding the sheet on a roll.

Claims22

Dependent claims

A method for producing calendered paper or paper-board, comprising steps of

manufacturing a web base sheet of paper or board,
coating the web base sheet with at least one coating layer so that water is absorbed in the web,
bringing the base sheet containing water to a calendar,
leading the web base sheet through at least one nip formed by two rolls of the calender and imposing simultaneously heat and pressure on the web base sheet in the nip in order to treat the surface of the web, whereby also water is removed from the sheet,
drying to remove water from the web base sheet before printing to such an extent that the moisture content of the sheet is adjusted to a value of 0.0 to 4.0%, remoisturizing the sheet after calendering and drying to a moisture content of 0.0 to 4.0%,
leading the treated sheet to a winder, and
winding the sheet on a roll.

4 more elements

Dependencies are inferred from the claim text.

Method for producing coated calendered paper

Life of this patent

Method for producing coated calendered paper

Life of this patent

Abstract

Claims22