Using Hardness Variation (CV%) to Identify Defective Rolls
Using Hardness Variation (CV%) to Identify Defective Rolls “Papermaking would be easy, if only there were no edges!” Problem: Converter rejects were traced back to certain rolls, but the mill had no reliable way to identify them before shipment. Task: Find out a method to determine rolls that do not meet converter specs before roll […]
Continuous porosity profile measurement of paper, board and nonwovens
Continous Profile Porosity Sensors Porosity: an important quality parameter Porosity and air/gas permeability are important quality parameters for many paper, board and nonwoven products. Laboratory testers can be used to obtain porosity measurements from individual samples. In many cases it would be useful to know if the porosity varies as trends in the machine direction […]