Electronic Insulating Material Insulation Board Transformer Insulation Corrugated Paper

• Material: Wood Pulp
• Color: Natural Brown or Red
• Tensile Strength: Good
• Type: Corrugated Board
• Product Name: Corrugated Board
• Rated Voltage: 35kv-110kv
• Model NO.: Corrugated Board
• Sample: Freely Supplied
• Application: High Temperature
• Insulation Class: a (105)
• Transport Package: Wooden Cases or Wooden Pallet10 Ply Plywood
• Trademark: Powerwell
• Origin: Hunan, China
• Production Capacity: 50 Ton/Tons Per Month 10 Ply Plywood

Product Description

	Test standard	Measured value	Standard value
Thickness tolerance	IEC 641-2	≤ 1.6 mm 6.00 % > 1.6 - 8.0 mm 4.00 %	±7.5 % ± 5.0 %
Apparent density	IEC 641-2	≤ 1.6 mm 1.09 g/cm³ > 1.6 - 4.0 mm 1.15 g/cm³	1.00 - 1.20 g/cm³ 1.10 - 1.25 g/cm³
Min. tensile strength M.D. unfolded	IEC 641-2	≤ 1.6 mm 107 N/mm² > 1.6 - 4.0 mm 128 N/mm²	70 N/mm² 80 N/mm²
Min. tensile strength C.M.D, unfolded	IEC 641-2	≤ 1.6 mm 77 N/mm² > 1.6 - 4.0 mm 83 N/mm²	50 N/mm² 55 N/mm²
Min. elongation M.D, unfolded	IEC 641-2	3.9 %	6.0 %
Min. elongation C.M.D, unfolded	IEC 641-2	4.1 %	8.0 %
Max. moisture content	IEC 641-2	4.2 %	8.0 %
Max. ash content	IEC 641-2	0.3 %	2.0 %
pH of aqueous extract	IEC 641-2	6.3	6.0 - 9.0
Max. shrinkage M.D	IEC 641-2	0.4 %	0.5 %
Max. shrinkage C.M.D	IEC 641-2	0.6 %	0.7 %
Max. thickness shrinkage	IEC 641-2	3.9 %	5.0 %
Min. oil absorption	IEC 641-2	≤ 1.6 mm 13.7 % > 1.6 - 4.0 mm 10.6 %	11.0 % 9.0 %
Compressibility C	IEC 641-2	≤ 1.6 mm 9.4 % > 1.6 - 4.0 mm 5.7 %	10.0 % 7.5 %
Revers. part of compressibility Crev	IEC 641-2	≤ 1.6 mm 54 % > 1.6 - 4.0 mm 71 %	45 % 50 %
Min. breakdown voltage in oil	IEC 641-2	≤ 1.6 mm 50 kV/mm > 1.6 - 4.0 mm 45 kV/mm	12 kV/mm 10 kV/mm
Max. conductivity of aqueous extract	IEC 641-2	≤ 1.6 mm 3.3 mS/m > 1.6 - 4.0 mm 3.5 mS/m	10.0 mS/m 10.0 mS/m