H41 Insulation Pressboard-made from Arauco Pulp Production Description: 1) Pre-compressed Pressboard, with Quality Standard: IEC60641-3-1:1992/GB/T 19264.3-2003 2) Thickness: 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm 3) Material: 100% unbleached sulfate pulp imported from Canada, Russia. 4) High density, high mechanical strength, high electric strength and low compression index. 5) 4400mm*2200, 6400mm*3200mm and customized size Transformer pressboard Large Size:4400*1600mm,4200*2100mm,4000*2000mm; Medium Size: 2200*1600mm,2200*1470mm,2200*1400mm; Small Size: 2200*1100mm, 2200*1000mm,2000*1000mm. Usage: Mainly used in oil-immersed transformer as insulation material, also used in reactor mutual inductance ware, electric device and etc. H41 Transformer Board Technical Specifications: No Item Unit Specification Standard 1 Thickness mm í_1.6mm í+7.0% >1.6mm-8.0mm í+5.0% 2 Density g/cm3 í_1.6mm 1.00-1.20 >1.6mm-3.0mm 1.00-1.25 >3.0mm-6.0mm 1.15-1.30 >6.0mm-8.0mm 1.20-1.30 3 Tensile strength MD MPa í¦90 CD MPa í¦50 4 Elongation MD % í¦3.0 CD í¦4.0 5 Shrinkage MD % í_1.0 CD í_1.4 TD í_6.0 6 Moisture % 4.0í¬9.0 7 Ash Content % í_1.0 8 Conductivity of Aqueous Extract Ms/m í_10 9 PH of Aqueous Extract / 6.0-9.0 10 Oil Absorbency % í¦9.0 11 Electrical Strength (In Oil) Kv/mm 1.0mm í¦35 1.5mm í¦30 2.0mm í¦30 2.5mm í¦27 ¦3.0mm í¦24 12 Cutting Size Tolerance mm 1.0mm-8.0mm í+10 13 Inclination Tolerance mm 1.0mm-8.0mm í+10 Package:Wrapped with vinyl film for waterproof, weaved material, then core paper packed, and wooden pallets.