| 摘要 |
The method of taking antibacterial measures with the use of titanium oxide comprises mixing titanium oxide into a resin to thereby obtain a coating resin and applying the coating resin on the surface of keys. In this method, it is needed to form a coating layer on resin moldings, so that the number of production steps would be increased to thereby cause cost increase. Further, in this method, the coating film containing the antibacterial agent would be pared off little by little each time keying is made until the vanishing of the film and the vanishing of antibacterial activity. To cope with this problem, direct mixing of an antibacterial agent into resins can be considered. However, titanium oxide as an antibacterial agent would deteriorate resins as a base material. In recent years, photocatalytic apatite as a substitute for titanium oxide is considered to induce choking, and has been used in the formation of an antibacterial coating layer on the surface of resin moldings. However, the inventor has found that photocatalytic apatite does not induce choking, thereby realizing a resin containing the photocatalytic apatite.
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