PDA.C 02 MSC - Module Standard Coating

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

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