METHOD AND ARRANGEMENT FOR DETERMINING THE AMOUNT OF COATING AGENT IN INDIVIDUAL COATING AGENT LAYERS IN MULTILAYER CURTAIN COATING

摘要

The invention relates to a method for determining the amount of coating agent in coating agent layers (44) applied on a fibrous web (W) in respect of individual coating agent layers in multilayer curtain coating, in which method the fibrous web (W) is coated by curtain coating with two or more coating agent layers (44) by using a slide-fed curtain coater comprising a nozzle beam (40) with at least two feed chambers (12) and the nozzle slots (30) relating to them for feeding at least two coating agent layers on the runoff slide (35) formed by the nozzle beam (40). In the method, the amount of coating agent flow in each coating agent layer is measured from the feed line (22) of each coating agent layer before feeding the coating agent into the feeding chamber (12) of the coating agent layer. The amount of coating agent in each coating agent layer on the web is determined on the basis of the amount of flow measured by simultaneously taking into account at least the speed (V) of the fibrous web (W) and the width of the coating curtain applied. The invention also relates to an arrangement for implementing the method.