PDA.C 02 MSC - Module Standard Coating
For examining the coating color and base paper interactions
A method for coating color optimization with the emtec PDA.C 02 - developed by G. Gruener and Dr. M. Baumeister
Characterization of the coating base paper surface
Defined coating color preparation
Simulation of the coating machine applicators at the time the coating color and the base paper are contacted :
Simulating the shearing history of the coating color in the coater
Dynamically contacting the coating color with the base paper
Producing a high shear impulse and pressure pulse
Characterization of the coated paper
Instantaneous measurement within approx. 39 msec after the contact
Simple evaluation of the measuring results
WHAT ARE THE BENEFITS OF THE MEASURING METHOD?
Differences in base papers, coating colors and coated papers lead to quality changes during processing; unfortunately, the classical measuring methods do not adequately detect these variations. The PDA.C 02 system is able to identify these differences.
Pilot coater and machine trials indicate the effects of coating color and base paper variations. The PDA.C 02 provides a tool to explore the origins in the lab.
THE PDA.C 02 CAN MEASURE ALL THREE STAGES OF THE COATING PROCESS :
1. Base paper
Assessing process relevant surface quality parameters such as surface porosity, surface sizing and fines/filler concentration at the surface
R & D: Optimizing the base paper, developing new grades, ensuring quality consistency of several rolls in coating trials
QC: Detecting slight quality variations during production
2. Coating color in contact with base paper
Reducing the need for pilot coater / machine trials
R & D: Visualizing the interactions between the coating and substrate surface, gaining new insights, optimizing the additive and pigment use (types and dosages)
QC: Controlling the incoming quality of additives and pigments
Assessing the changes in runnability, coating hold out, covering and print evenness in offset and flexo printing
3. Coated paper
Assessing the surface quality of coated papers :
Identifying small changes in the coating quality by comparing measurement results of liquid penetration with suitable test liquids (water, water + Isopropylalcohol mixture, acetic acid)
Determining and predicting the properties such as printability, glueability or barrier effects on the basis of a database or process analysis