METHODS OF REDUCING ROLL FAULTS CAUSED BY POOR THICKNESS PROFILE

摘要

When material with varying thickness is wound, the resulting deviations from a perfect cylindrical rollcause long-lived defects in the web when it is unwound. These include baggy lanes and wrinkles; also rollstacking may be poor. Averaged, rather than single scan, thickness profile is needed to predict the faults.This paper will describe how the faults can be reduced by a combination of changing product formulationand winding conditions, and improving the thickness uniformity.