Effect of Surface Roughness on Haze and Glossiness Values of an Acrylic Plate Surface

Abstract

The effect of the concavo-convex surface profile of a transparent acrylic plate on haze and glossiness was experimentally investigated. The surface of the acrylic plate was shot blasted using glass beads to alter the surface roughness of one or both sides of the plate by changing the projection pressure. The surface texture was comprehensively evaluated by using 3D surface texture parameters. As a result, it was found that the haze value increased and the gloss value decreased as the arithmetic mean height increased. The tendencies for the total light transmittance to decrease and the haze to increase both differed between specimens shot blasted on either single or both sides. Moreover, it was shown that measurement points from either the blasted surface or the unprocessed surface were unlikely to affect haze but that both were likely to affect glossiness due to reflection. Thus, we showed that varying the measurement direction of the processed surface could change the haze value without changing the glossiness.