| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition which can give a resin product having a long life of afterglow, not deteriorated mechanical strengths, reduced unevenness of luminance and excellent afterglow by mixing a thermoplastic resin with a specified amount of a photostimulator and a specified amount of at least one member selected from among silicon oxide, calcium carbonate, and barium sulfate. SOLUTION: The silicon oxide or the like is used in an amount of 5.0 wt.% or below. The photostimulator has a mean particle diameter of 5-100μm and is contained in an amount of 5-20 wt.%. The silicon oxide has a mean particle diameter of 0.1-10μm and is used in an amount of 5 wt.% or below, the calcium carbonate and/or the barium sulfate have each a mean particle diameter of 0.1-10μm and is used in an amount of 1.0-3.0 wt.%. More desirably, the amount of the silicon oxide added is 0.3-3.0 wt.%, and those of the calcium carbonate and/or the barium sulfate are each 1.0-2.0 wt.%. The resin matrix is more desirably a highly plasticized vinyl chloride resin.
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