プラスチックフィルムのコロナ照射による結晶質の析出 第3報

Abstract

Organic materials are largily digralated by corona discharges in wet air. Main phenomenon of this damage are formation of crystals on the surface of sample by decomposition of the organic materials, and water absorption of this crystals abates the surface resistivity of the sample. The leakage current on the surface of sample makes tree-tracking which digradates corona resistance of the sample. McMAHON (1968) stated oxalic acid was found on polyethylene film by corona discharges in the presence of humidity. Auther ascertained on polycarbonate film also that oxalic acid was composed by corona discharges in wet air. Analogous crystals ware found on polyethylen terephtalate, polystyrole, polyvininyl chloride and cellulose triacetate.