PRODUCTION OF COATED PAPER AND COATED CARDBOARD BY ROD TYPE COATING APPARATUS

摘要

PURPOSE: To eliminate the formation and adhesion of coating refuse or the generation of a coating stripe, in a method for producing coated paper and coated cardboard using a rod type coating apparatus, by specifying the physical properties of coated raw paper and a coating compsn. ;CONSTITUTION: A coating compsn. 7 of which the viscosity at 10²-10⁷sec^-1 is ηcp within a shearing region of a shearing speed prescribed by a capillary diameter h₂mm and a coating speed Sm/min constituted of a rod bar 10 and coating raw paper 1 is adjusted so that the value A of the formula being the characteristic thereof becomes 1-300 to be applied to coating raw paper 1 with water absorbability of 0.05-1.0ml/m and smoothness of 10-10.0ml/m² (by a Bristol apparatus). In the formula, Wr is water retention g/m², η is viscosity cp at a shearing speed at a time of coating, Ka is water absorbability ml/m² by a Bristol apparatus, T is the thixotropy of paint and S is a coating speed m/min.;COPYRIGHT: (C)1996,JPO