Calendering arrangement for a paper machine

Details Calendering arrangement for a paper machine Calendering arrangement for a paper machine

D - Textiles, Paper

21

G

D21G 1/00 (2006.01)

Patent

CA 2390206

The present invention relates to a calendering arrangement for a paper machine for producing higher-gloss paper grades, in particular paper grades with a Hunter gloss % above 40. In accordance with the invention, the arrangement comprises, as a combination, pairs of calendering units (1, 3) disposed in the machine direction one after the other and apart from one another, which pairs are each formed of separate and different calendering units (1, 3) and in each of which the nip load in the latter calendering unit (3) is higher than the nip load in the preceding calendering unit (1). Advantageously, the calendering unit (1) placed first in the machine direction is an on-line long-nip calendering unit (1) and the calendering unit (3) placed after that in the machine direction is an on-line or off-line supercalender.

L'invention concerne un dispositif de calandrage pour machine à papier, pour la production de qualités de brillance de papier supérieures, notamment d'un % de brillance de Hunter supérieur à 40. Le dispositif de l'invention comprend des paires combinées d'unités de calandrage (1, 3) placées dans le sens machine, les unes à la suite des autres et séparées les unes des autres, formées chacune d'unités de calandrage séparées et différentes (1, 3), la charge de contact dans l'unité de calandrage (3) étant supérieure à celle de l'unité de calandrage précédente (1). Pour plus d'efficacité, l'unité de calandrage (1) placée d'abord dans le sens machine est une unité de calandrage en ligne (1) à ligne de contact longue et l'unité de calandrage (3) placée après, dans le sens machine, est une supercalandre en ligne ou hors ligne.

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