Patent ID: 6022448
Filing Date: 2000-02-08
Classification: D21G,D21H

Abstract:
In a process for the production of coated paperboard for formed articles with adequate surface for printing and adequate surface gloss for each specific type of formed articles, and wherein the fibermatrix of the paperboard is composed of one, two or more layers, wherein the improvement comprises performing the calendering operation only after the coating operation with a calender which is run at high temperature and has a soft extended nip to produce a paperboard comprising a fibermatrix in one, two or more layers and a coating for printing having reduced susceptibility for crack formation at folding, which paperboard has been calendered after coating with a heatable calender having a soft extended nip, to impart to said coated paperboard a reduced density and reduced grammage at the same bending moment compared to a corresponding coated paperboard of the same number of layers and using the same raw materials, which has been calendered before or before and after coating with a heatable or non-heatable calender having a hard or soft nip.