China Insulation Diamond Dotted Paper

1. FEATURESHot-pressed Pressboard, 100 % sulphate pulpHigh hardness and stiffnessLow shrinkage and compatibilityHigh purity and mechanical strengthGood compatibility with liquid dielectricsFurther processing is ensured since the pressboard can be punched, folded, cut and formed without difficulty.
2.APPLICATIONS
Used as insulating material in power and distributing transformer. It is suitable for strips, cylinders, spacer, plates and structural supports of oil-liquid of distribution transformers, reactor and bushing current transformer.
3.TECHNICAL PARAMETER

ItemsStandard IEC60641-3-1Thickness Tolerance± 7.0%Density1.05 -1.20 g/cm3Tensile strength
MD
CMD≥ 90 N/mm2≥ 50 N/mm2Shrinkage
MD
CMD
Perpendicular≤ 1.0 %
≤ 1.4 %
≤ 6.0 %Elongation
MD
CMD≥ 3.5 %
≥ 4.0 %Ash Content≤ 1.0%PH Value of Aqueous Extract6 - 9Oil Absorption≥ 9%Conductivity of Aqueous Extract≤ 10 mS/mElectrical Strength in Oil
0.8mm -1.0mm
1.5mm - 2.0mm
2.5mm
3.0mm - 4.0mm
≥ 35 KV/mm
≥ 30 KV/mm
≥ 27 KV/mm
≥ 24 KV/mm