| 摘要 |
PURPOSE:To harden a balance adjusting weight reliably to the inside without leaving unhardened parts by adding/mixing a single kind or two or more kinds of solid spherical powder to/into ultraviolet radiation hardening resin from a class of silicate glass, borate glass or phosphate glass. CONSTITUTION:Powder being mixed into ultraviolet radiation hardening resin is selected from a class of silicate glass, borate glass or phosphate glass such as having high ultrviolet radiation transmissivity and large specific gravity so as not to exert a bad influence upon hardening, and more concretely, silica glass, soda lime glass, alumino borate glass and so on can be listed. The powder is required to have the specific gravity equal to or larger than 2.0, and also to be solid in terms of the specific gravity, and light transmissivity, non-oriented property to light and high charging efficiency must be taken further into consideration, so that a particle shape is required to be spherical. A single kind or two or more kinds of the above-mentioned powder is added to/mixed into the ultraviolet radiation hardening resin. Thereby, since a balance adjusting weight can be hardened to the inside in a short time by means of ultraviolet radiation without leaving hardened parts, the powder can be adhered reliably to each other through the resin, so that the weight having optimal high specific gravity can be obtained. |
