Natural Insulating Paperboard, Press Paperboard, Kraft Paperboard, Transformer Paperboard

• Application: Electrical Winding Insulation, Electrical Base, Shell
• Type: Insulation Sheet
• Chemistry: Kraft Paper and Paper Board
• Material: Unbleached Sulphate Pulp
• Thermal Rating: B 130
• Maximum Voltage: 20KV~100KV
• Model NO.: HFI-P001
• Classification: Paperboard
• Certification: ISO9001
• Color: Natural
• Brand: Hfi
• Size: 1000*2000
• Transport Package: 1000kgs/Pallet
• Specification: width: 1000mm
• Trademark: HFI
• Origin: China
• Production Capacity: 50000kgs/Day

Product Description

Natural Insulating Paperboard
Type: 3052 (B.3.1)
 

1.COMPOSITION AND PRESENTATION

Normal Thickness: 0.50; 0.80; 1.0; 1.5; 2.0; 2.5; 3.0 mm
Normal Size: 2000 X 4200 mm;
 

2.PROPERTIES & APPLICATIONS.

This product made from highly purified unbleached sulphate pulp. It has obvious good properties in
mechanical strength., electrical strength and compressibility. It is suitable for strips, cylinders, spacer,
plates and structural supports of oil-liquid of distribution transformers, reactor and bushing current
transformer.

3.MAIN TECHNICAL CHARACTERISTICS

Items	Standard IEC(641-3-1):1992
Thickness Deviation	≤ 5.0%
Density	1.10 -1.25 g/cm^3
Tensile strength MD	≥105 N/mm^2
Tensile Strength CMD	≥ 80 N/mm^2
Shrinkage MD CMD Perpendicular	≤ 0.5% ≤ 0.7% ≤ 5.0%
Elongation MD CMD	≥ 3.0% ≥ 4.0%
Ash Content	≤ 1.0%
PH Value of Aqueous Extract	6 - 9
Oil Absorption	≥ 9%
Conductivity of Aqueous Extract	≤ 5 mS/m
Electrical Strength in Oil 0.5mm -1.5mm up 1.5mm -3.0mm	≥ 40KV/mm ≥ 35 KV/mm
Moisture Content	≤ 6 %