How does PDA.C 02 with Module Coating function?

18 May 2008

The base paper sample is fixed on a sample holder with two-sided tape. A special cuvette with the coating color is placed into the measuring cell where ultrasonic sensors are mounted on opposite sides for recording the process of penetration.

This cuvette contains a shearing gap where the sample holder is "shot in" with the paper sample at a high speed. This produces dynamic contacting under impulse-shaped pressure and shearing load that produces an excellent simulation of the conditions on the applicator of coating machines (roller coating, jet-applicator).

measuring principle

Immediately after reaching the end position of the sample in the shearing gap, the transmitter transmits high-frequency ultrasonic signals through the measuring sample to the receiver and the change in intensity is recorded. This time-dependent change in intensity contains essential informations on the interaction between the coating color and the coating base paper in the interesting surface area from the contact moment.

(Also refer to How does the PDA.C 02 system function?)

emtec Electronic GmbH

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