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    • 5. 发明专利
    • MANUFACTURE OF FIRE RESISTING X-RAY SHIELDING PLATE WITHOUT ASBESTOS
    • JPH0862387A
    • 1996-03-08
    • JP20262194
    • 1994-08-26
    • SUMITOMO FORESTRYFUJI FUNEN KENZAI KOGYO KK
    • OTA HITOSHIMATSUURA SADAJISERIZAWA NORIO
    • G21F1/04
    • PURPOSE: To manufacture a asbestos non-contained fire resisting X-ray shielding plate not containing asbestos by the wet manufacturing method of a mixed material containing barium sulfate by using a water-contained magnesia silicate mineral as component. CONSTITUTION: A water-contained magnesia silicate mineral allows the molding by wet manufacturing method of a mixed starting material containing barium sulfate. For this, sepiolite is particularly preferred among sepiolite, serpentinite and the like, and its content in the mixed starting material is 2-10wt.%. As the barium sulfate powder forming the main starting material, barite powder is used, and its content is 30-60wt.%. A metal carbonate powder is also used as a main starting material, and selected from the powder group consisting of nickel carbonate, strontium carbonate, and barium carbonate. Its content is 3-15wt.%. The content of cement and granulated stag for imparting shape holding property to a shielding plate and holding the strength is 30-50wt.%, and a reinforcing agent for the shielding plate selected from the group consisting of alkali-resistant glass fiber, synthetic organic fiber, and pulp is contained in the mixed starting material in an amount of 4-10wt.%.