| 摘要 |
PURPOSE: To obtain the subject powdery coating material having excellent smoothness and appearance, capable of keeping high efficiency of electrostatic coating by comprising granule groups simultaneously satisfying an average granular diameter of each granule group and conditions of cumulative undersize. CONSTITUTION: This powdery coating material is composed of a granule group simultaneously satisfying the conditions such as (A) <=20μm average granular diameter of granule group, (B) cumulative undersize 25% granular diameter (D25 )/cumulative undersize 75% granular diameter (D75 ) of >=0.6 and, further preferably, (C) an average value of (4π×projected area/(peripheral length)<2> )>=0.72. An average granular diameter of the powdery coating material is preferably 1-10μm, more preferably 4-7μm. The powdery coating material is obtained by, e.g. mixing raw powders, making pellets by melting and blending, pulverizing with an atomizer, etc., and preferably classifying in an air flow-type classifier.
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