Abstract
In this work, in order to make clear the effect of kneading process for high dispersion as well as the stability of the magnetic paint, fine metal particles were continuously kneaded by twin screw extruder, and followed a dispersion by beads agitator mill. The degree of kneading and dispersion were evaluated by the rheological property of magnetic paint, . the gloss and surface roughness of a coated magnetic film. The adhesiveness of binder resins for the surface of metal particles was evaluated by mesuring the amount of adsorbtion of binder resins and fatty acids. It was clear that binder resins adhered to the many adsorbtion points existed on the surface of the metal particles by use of kneading process. Since the surface adhesion force was very strong, the binder resins didn't separate from the surface of metal particles, even the use of a dilute of magnetic paint. It was anticipated that the kneading process would be very usefull for the stability of magnetic paint.
