| 摘要 |
PROBLEM TO BE SOLVED: To obtain a wall material always stably generating minus ion in an external force-free stationary state. SOLUTION: This wall material has a synthetic resin layer and a pattern printed layer on a paper substrate or a nonwoven fabric. The wall material is a minus ion generating wall material containing minus ion generating powder in at least one layer of the paper substrate, the nonwoven fabric, the synthetic resin layer or the pattern printed layer. The minus ion generating powder used is (1) mixed powder of tourmaline powder (specific gravity A, average particle diameter (a)) and zirconium compound powder (specific gravity B, average particle diameter b) except zirconium stabilized by electromelting in the ratio by weight of the zirconium compound powder except the zirconium stabilized by electromelting to the tourmaline powder of 100 Bb<3> /3Aa<3> -1,000 Bb<3> /Aa<3> pts.wt to 100 pts.wt. or (2) mixed powder of the tourmaline powder (specific gravity A, average particle diameter (a)) and zirconium compound powder (specific gravity C, average particle diameter c) stabilized by electromelting in the ratio by weight of the zirconium powder stabilized by electromelting to the tourmaline powder of 25 Cc<3> /Aa<3> -1000 Cc<3> /Aa<3> pts.wt to 100 pts.wt.
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