Diamond Dotted Paper

Diamond dotted insulation paper is made of electrical insulating paper with diamond-shape epoxy resin dotted in both sides.The epoxy resin used in D.D.P.contains a kind of incubative hardener material,it is a dry and crisp material at normal temperature(below35 centigrade) It can be used as insulation material for coils and between layers of oil immerged power and distribution transformers. ItemIndex.UnitValue1Thickness and tolerancemm0.08±0.0050.13±0.0070.18±0.0100.20±0.0100.25±0.0102Densityg/cm30.85 1.103Single thicknessμm10 154Moisture content%4.0 8.05Oil-absorption%≥206Bond strengthat room temp.kPa≥650100°C±2°C≥4007Pollution for transformer oil-no pollution8Tensile StrengthlengthwiseN/10mm≥60≥110≥160≥180≥230crosswise≥30≥50≥70≥80≥1009Tearing StrengthlengthwiseMn≥450≥900≥1350≥1500≥2000crosswise≥500≥1000≥1500≥1700≥230010Breakdown voltagein airKV≥0.88≥1.37≥2.00≥2.10≥2.25in oil≥4.40≥7.00≥9.00≥9.80≥11.50