Abstract
To study a removal mechanism of solid particles, polyethylene and glass particles adhered respectively to cellulose, acetate and polyester films were removed in the washing device, and F
H1/2, the force necessary to detach the soils, was estimated. The particle behavior was recorded on a video tape, and analyzed by a VTR system and a personal computer. The results were compared with the previous results using polystyrene latex particles.
The following insights were obtained:
1) F
H1/2 existed only glass particles in the order of: cellulose<glass<acetate<polyester.
2) Glass particles had two types of removal behaviors, A and B types. But polyethylene particles had only B type. The ratio of A type removal affected on the hydrophilic property of substrates.
3) The glass particles of A type removal had two types of removal behavior, A
1 and A
2 types. The rate of A
1 type removal was higher than that of the A
2 type removal, irrespectively of flow speed. The moving speed of A
1 type particles was faster than that of A
2 type particles, that have already been reported as polystyrene particles.
4) The distance between particles on the hydrophilic substrate was estimated to be longer than that on the hydrophobic substrate. With polystyrene latex and glass particles, the removal percentage increased with the increase in the distance.
