抄録
The effects of concentration of polyvinylalcohol (PVA) in washing bath, washing number, time, temperature, on washing quality in repeated washing were experimentally investigated with polyester/ cotton blended fabrics treated with PVA. These experimental results were compared with calculated values using the theoretical equations[1, 2], previously derived based on the diffusion theory and a newly derived theoretical equation which referred to the effect of the bath concentration of a chemical to be removed. Assuming that PVA does not exist in fibers but only among fibers and that the fiber assembly is a column, the diameter of which is the same as that of the yarn, it has been found that the above mentioned experimental results agree well with the theoretical ones.
Further, according to these results the washing processes in a practical washing machine were analyzed in detal. Under the same assumptions, it has also been found that the calculated values based on this theoretical analysis agree well with experimental results obtained by using a practical washing machine. According to these studies, the approximate washing efficiencies using a practical washing machine, can be predicted from the fundamental values such as the diffusion coefficient of a chemical to be removed, the yarn diamer, etc.
