| 摘要 |
PROBLEM TO BE SOLVED: To provide a process and an apparatus for applying coating to powder in which processing time and cost are reduced.SOLUTION: In a process and an apparatus for applying coating to powder, microwave plasma 5 is generated in a reaction tube 3 to activate surfaces of carriers 1 by supplying the carriers 1 into the reaction tube 3 penetrating a microwave resonant cavity 4 together with gas 2 and introducing microwave from a waveguide 6. Then, as the surfaces of the carriers 1 are brought into contact with powder cloud of coating polymers 8 in a polymer precursor zone 7, the polymers 8 are electrostatically accumulated on the surface of the activated carriers 1 to form coating 8A. Furthermore, by passing the carriers 1 through a tubular path to dissolve coating polymers and make them attach to the carriers 1, carrier particles 9 in which polymers are coated on the surfaces of the carriers 1 are prepared. |
