| 摘要 |
PURPOSE: To improve the efficiency of the dry process for making powder paint and to narrow particle size distribution by a method in which a melt- kneaded powder paint resin composition is discharged from the opening of a rotating rotor to make a fibrous composition with a specified diameter, which is converted into powder with a specified average particle size through an optional pulverization process. CONSTITUTION: In the production method of powder paint, for example, a powder paint composition melt-kneaded by an extruder 1 is discharged from the opening of a rotating rotor 2 to make a fibrous composition 1.0α-20.0αin diameter. (αis the average particle size of powder paint obtained.) Next, the fibrous composition is pulverized by an optional grinder such as a ball mill, and then fine powder is removed by cyclone 4, etc., to make an average particle sizeα. In this way, by making the average particle size of the obtained powder paintα, the diameter of the discharged fibrous composition is adjusted to be 1.0α-20.0α.
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