Minimization of slide instabilities by variations in layer place

Details Minimization of slide instabilities by variations in layer place Minimization of slide instabilities by variations in layer place

1993-06-11

1994-12-27

Beck, Shrive

Coating processes

Measuring, testing, or indicating

427420, 118DIG4, B05D 130

Patent

active

053764013

ABSTRACT:
The present invention is a method determining where to add hardener in a multilayer coating pack on a web fed through a coating station. The process includes determining the frequency and amplitude of the process noise associated with the coating station, determining the growth factor as a function of frequency on the incline surface and repeating these two steps for each of the layers in the coating pack. The plurality of growth factors obtained as a function of frequency is converted into a plurality of wave amplification versus frequency. After the plurality of wave amplitudes versus frequency is determined, one then selects from this plurality the one which is below a predetermined value in order to reduce coating cross streaks.

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AICHE Journal entitled, "Wave Propagation in the Flow of Shear Thinning Fluids Down an Inclined," Dec. 1990.

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