Method for calendering a strip of cardboard.
2001
A method for calendering a strip of uncoated board web (W) used for the manufacture of board grades known under the trade names White Lined Chipboard (WLC) and Folding Box Board (FBB) in a shoe calender to nip long (N), which is formed by a shoe roll (10) and a heat roller (20), which are used in an advantageous manner a residence time in the nip is greater than 10 ms, advantageously greater than 20 ms, a pressure of the nip which is less than 3 MPa, less than 1 MPa advantageously and surface temperature of the heat roller (20), which is greater than 200 ° C, advantageously greater than 250 ° C, wherein the surface of the cardboard strip (W) to be pressed against the heat roller (20) is moisturized before the nip (N) by spraying atomized water onto the surface of the strip cardboard (W) that is placed against the rODI thermal llo (20) in an amount of 1 20 g / m2, so that the time of action of water before the nip is about 0, 1 2 s, and wherein a calender belt is used (12), having a hardness less than 100 ShA, advantageously of less than 80 ShA, on the shoe roll.
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