Automatic Test Method of Sizing Degree by Analysis of Liquid Penetration and its Surface Behavior

Abstract

ABSTRACT This study was to develop a novel automatic system for measuring Stockigt sizing degree and contact angle at a time. The conventional methods to measure sizing degree had serious problems in obtaining significant differences according to different dosages of a sizing agent, and moreover they disclosed unique limitation due to liquid types used and test er’s subjectivity. However, the newly developed sys-tem could get reproducible results through total auto mation of all procedures including liquid dropping, image acquisition and measurement of both Stockigt si zing degree and contact angle. For the Stockigt sizing test, the automatic system could measure sizing degree with more defini te differences according to different dosage of AKD, compared to the conven tional method. For the cont act angle test, the auto-matic system showed a similar trend to the conventional method but had smaller contact angles due to distortion of an image focus by a sheet curl than the conventional testing machine. The problem from the image out of focus due to specimen curl will be overcome with adopting a new specimen holder for the future system.