In order to evaluate electrostatic hazards in the circumstance under non - metallic contacts, electrolstatic sensitivity test of lead styphnate was carried out with the approaching electrode method under the condition that one metal electrode would not be in contact with another metal electrode while approaching. sensitivity of lead styphnate was strongly dependent on capacitance, gap length and series resistance. In this experiment, the minimum energies of 50 % ignition were to be 39 µJ with capacitance of 300 pF and no series resistance for small crystals, and for normal mass produced samples, 85 µJ with capacitance of 300 pF and no series resistance and 69 µJ with capacitance of 300 pF and resistance of 220 Ω, respectively. The effects of lot variation or aging upon the sensitivity of lead styphnate were almost comparable with those of the particle size or its distribution on sampling. Though the sensitivity was observed to be higher with the series resistance and for small particles or thin film samples under the condition that one metal electrode would be in contact with another metal electrode while approaching, these effects were not recognized in this experiment. The same results were also obtained in the experiment with the conductive material electrodes.
金属 - 金属接触が生じない状態におけるトリシネートの静電気感度を求めるために, 所定の設定電極間隙長まで両電極を急速に接近させた後, 電極を接触させることなく引き離すタイプの接近電極装置を用いて静電気感度試験を行った｡ その結果, トリシネートの静電気感度は容量, 電極間隙長および直列抵抗によって変わった｡ 実験の範囲での最小E50は, 微結晶品の場合は300 pF, 直列抵抗なしのときの39 µJ, 普通の量産品では300 pF, 直列抵抗なしのときの85 µJ, 直列抵抗220 Ωのときの69 µJであった｡ トリシネートの感度のロットによる違いや経時変化は, 試料のサンプリングに基づく粒度と粒度分布の違いによるものと大きな違いはなかった｡ 金属 - 金属接触が生じる場合の感度試験で認められた直列抵抗接続による高い感度, 微粒子や薄膜状態試料のときの高い感度などは, 両電極が接触しない感度試験では認められなかった｡ また, 導電材電極を使用したときも特別に高い感度は認められなかった｡