Pressboard Strip and Spacer
Introduction
Insulation class A (105 ° C)
100% sulphate pulp
Natural-coloured
Precompressed pressboard, even fibre orientation, hard and dimensionally stable
High purity and mechanical strength
Low shrinkage, fibre-free surfaceGood compatibility with liquid dielectrics
Index.UnitValues≤1.6>1.6~3.0>3.01Nominal thickness tolerance%≤10(±)2Nominal Grammageg/cm31.00~1.201.00~1.251.15~1.303Shear strength ,M.D.Mpa≥100≥105≥1104Shear strength, C.M.D.Mpa≥75≥80≥855Elongation (M.D.)%≥3.06Elongation (C.M.D.)%≥4.07Shrinkage%≤10.0≤7.5≤5.08Shrinkage which would resume%≥45≥50≥5011Shrinkage:M.D.%≤0.5C.M.D.≤0.7Thickness direction≤4.012Moisture content%≤6.013Ash content%≤1.014Electrical conductivity of aqueous extractms/m≤1.6>1.6~3.0>3.015Aquesous extract (PH)-6~916Oil absorption%≥11.0≥9.0≥7.017Voltage resistant strength(In air)MV/m≥12≥11≥1018Voltage resistant strength(In oil)MV/m≥40≥35≥30