Nippon Paint Compnay, Ltd.

Zenichi Yasuda

Koichi Tsutsui

Akimitsu Uenaka

Takashi Nakajima

Misao Morita

There is obtained with greater efficiency a powder coating having an average particle diameter smaller and a particle size distribution range narrower than those currently made by conventional methods. The method to obtain the powder coating comprising; introducing a solid mixture of coating materials between a rotor and a stator; the rotor being supported in such a manner as to be rotating round the shaft center and, on its periphery, being arranged with multiple convex lines extending in a direction of the shaft and being lined up along the periphery; the stator having a cylindric rotor-opposite face arranged with a certain interspace between this face and the rotor periphery and having, on the rotor-opposite face, multiple convex lines extending in the direction of the shaft and being lined up along the circumference, wherein the rotor-opposite face is arranged in such a manner as to be capable of opening in order to expose the rotor periphery; and then pulverizing finer said mixture by said rotating rotor and said stator.

Method for making a powder coating

A measuring device for measuring the change in time-dependent thickness of the paint layer without any need of direct contact thereto. The device is provided with an optical arrangement which is well-known as Michelson-interferometer in principle, and is effective to obtain sharp and clear interference fringes even though the paint layer has a low reflectivity. It is also possible at laboratory side to observe the change of the paint layer under the circumstances to which the paint layer may be exposed actually.

Growing community of inventors

Ibaraki, Japan

Zenichi Yasuda