Abstract
This study investigated the characteristics of various types of non-asbestos casting ring liners. SEM observation, rate of vacant space and water sorption of the non-asbestos ring liners were examined. Fifteen non-asbestos casting ring liners and three asbestos ribbons were used. The main fibers in the liners were round rod-like fibers in A〜D groups and irregular form in the E group with/without globular particle and powder. The liners of A group (the rock-wool type) showed a higher rate of vacant space and higher water sorption, those of B〜D group (the ceramic fiber type) except for NA14 showed a higher rate of vacant space and lower water sorption and those of the E group (kaolin type) showed a lower rate of vacant space and lower water sorption compared with asbestos ribbons. NA14 (Ribbon Wool) of D group showed the highest rate of vacant space and especially a higher water sorption.
