Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


Pressdrying is simultaneous pressing and drying. It employs a steam heated roll in some type of extended nip.

This study was made to determine the effects of pressdrying on 100% bogus medium. Pressure during pressdrying and nip residence time were constant. Freeness and solids content before drying were varied. Pressdried sheets were compared to sheets dried under no pressure but produced under otherwise similar conditions.

At any given freeness level, the pressdried sheets were higher in density and ring crush, and lower in tensile and caliper. Variance of solids content before drying showed no trend for tensile. Based on significance testing, caliper and ring crush may vary according to solids.