Coating processes
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United States of America Patent
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-
Feb 21, 1995
Grant Date -
N/A
app pub date -
Jun 17, 1993
filing date -
Dec 20, 1990
priority date (Note) -
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Abstract
In curtain coating, uniform layer or layers are only obtained if the operational variables are held within precise limits. These limits define a 'coating window'. However, one of the boundaries of this 'window' is governed by the occurrence of air-entrainment. Described herein is an improved coating process in which allows the 'coating window' to be enlarged. This is achieved by using a material adjacent the support on to which the liquid material is to be coated which readily shear-thins.
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