| 摘要 |
PURPOSE: To provide a key top having high safety and excellent in antibacterial effects and transparency by applying a resin paint containing a wet ground ceramic antibacterial agent of specific grain sizes by a specific amount to the surface of the key top. CONSTITUTION: A ceramic antibacterial agent is wet ground in at least one kind of dispersion medium using a grinding medium with diameters in the range 0.1 to 5mm so that its average grain sizes are in the range 0.05 to 0.5μm. A paint containing a suspension of the antibacterial agent by 1 to 30wt.% is applied to the surface of the key top of a keyboard switch and dried. The ceramic antibacterial agent comprises ceramics adding an antibacterial agent and is e.g. copper zeolite, an antibacterial condensed phosphate, an antibacterial zirconium phosphate or the like. The paint is e.g. an ultraviolet-setting paint of an urethane acrylate type, a polyester acrylate type, an acrylic ester type or the like, a thermosetting acrylic paint, a fluorine paint, or the like.
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