Curtain coating method for eliminating sagging at high flow rate

Details Curtain coating method for eliminating sagging at high flow rate Curtain coating method for eliminating sagging at high flow rate

1993-01-13

1995-02-28

Beck, Shrive

Coating processes

Falling curtain of coating material utilized

118DIG4, B05D 130

Patent

active

053935713

ABSTRACT:
A coating method that is capable of rapid curtain coating without causing "sagging" at high flow rates exceeding 4 cm.sup.3 /cm.sec. One or more layers of a coating solution are formed on a sliding surface, and a free falling curtain of the coating solution is allowed to impinge against a continuously running web. The web has a surface roughness of at least 0.3 .mu.m, the tip of the sliding surface forms an angle of 45.degree. to 120.degree. with respect to the horizontal, and the viscosity of the coating solution is adjusted to at least 90 cps for low shear rate, with the average for all layers formed being at least 80 cps.

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Article from Symposium Aiche Winter National Meeting 1982, Fundamentals of Coating Operations-I. (no month date).

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