Abstract
The author investigated the film thicknesses of two species of water soluble acrylic resin paints, Clear and White, adhered to an aluminum cylinder by dip-coating under stationay conditions. The coatings were made on aluminum wires and round bars under the following conditions. Whithdrawal speed: Clear 0.75, 1.75cm/sec, White 0.52, 1.50cm/sec, Radii of test pieces (cylinders): 6 values of R=0.0625-0.5cm, Ca number: 5.11×10-3-14.7×10-3, Go number: 0.2-2.0, The following results were obtained from the above experiments. (1) The theoretical values of film thickness adhered to cylindrical test pieces, reported by D.A. White and J.A. Tallmadge, were in good agreement with these experimental results, (2) The theoretical value of film thickness adhered to cylinders (h′th)could be determined by multiplying the value of theoretical film thickness adhered to plates (hth) by a coefficient, Cm
h′th=Cm⋅hth where Cm=1/2.4Go0.85/1+2.4Go0.85+0.5/GoGo=R(ρg/2σ)1/2 (3) The relation between h′th and h′ov (the measured value of film thickness adhered to the cylinders) was identical with the relation between hth and hov (the measured value of film thickness adhered to plates). The residual coefficients were approximately equal in both plates and cylinders when the coating were made under the same conditions:
h′ov=K⋅h′th=K⋅Cm⋅hth
