| 摘要 |
PROBLEM TO BE SOLVED: To provide a gypsum board which has high electromagnetic wave radiation effect and far infrared radiation effect. SOLUTION: A composition is prepared by blending 10 to 50 pts.wt. of high purity carbon powder with a carbon content of≥50% produced by performing dry-distillation in a non-oxygen state and 10 to 50 pts.wt. of hormesis material powder radiating low radiation of≤370 becquerel/g with respect to 10 pts.wt. of tourmaline powder. A wall structure material suitable for the utilization of electromagnetic waves and far infrared radiation can be provided by blending the above composition of 20 to 50 pts.wt. to 100 pts.wt. of a gypsum board material, controlling a radiation dose to≤1μSv/h on the whole thereby producing a hormesis gypsum board. COPYRIGHT: (C)2011,JPO&INPIT
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