Abstract
Polystyrene particles and basic iron sulfate [Fe3 (OH) 5 (SO4) 2·2 H2O] particles adhered to a glass plate, and cellulose, polyester and polystyrene films were removed in a washing device which was designed to produce a laminar flow between two cylinders of 5 mm gap at various rotation speed. The relationship between the separating force and the removal percentage, and the adhesive force between particles and substrate were estimated. The following results were obtained. 1) The results obtained in the new device were superior in accuracy than those in the device eqipped with a turn table which was reported in Part 1. 2) Under all washing conditions, the removal percentage of basic iron sulfate particles was lower than that of polystyrene particles. 3) The relationship between the separating force and removal percentage in each washing condition was similar to that in Part 1. 4) The adhesive force to several substrates of polystyrene particles in water was in the order; cellulose<glass<polyester, and was estimated at the range of 3.86 to 5.32×10-7 dyn, and that of basic iron sulfate particles was; cellulose<glasspolystyrene<polyester, and was estimated at the range of 11.5 to 15.8×10-7 dyn.
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