Practical Studies of Coat Weight Profile Control, 1994 Coating Conference Proceedings

Markku Ellila

The paper describes the problems of cross-machine variability of coat weight in blade coating, and the methods that are commonly used to overcome them.

An extensive set of trial runs, and measurements on production machines were made to assess the applicability and performance of an automatic coat weight profile control system in making different coated paper grades.

The results show that LWC and wood-free coated grades can benefit from reduction of 2-sigma variation by up to 65% in a typical improvement period of 2-3 minutes.

We also present results of our experience with ceramically coated blades, low-angle blade coating, long-term behaviour of blades, and on spectrum analysis of coat weight profiles.

Author: Ellila, M.
Practical Studies of Coat Weight Profile Control, 1994 Coati
Practical Studies of Coat Weight Profile Control, 1994 Coating Conference Proceedings
35.00

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