.highly purified insulation paper
.stable electrical and chemical properties
.Good compatibility with liquid dielectric
1 Features
· Insulation class A (105 °C)
· Calendered presspaper, good forming properties, 100 % sulphate pulp
· Colour natural
· High purity and high oil-absorption
· Good compatibility with liquid dielectrics
· High electric dielectric strength
· Presspaper can be coated with baked enamel or laminated with Polyester Film
2 Applications
electrical insulation brown paper rolls is appropriated for uses as electric industrial board for motors, electric device, instruments, switch board, oil transformer for insulation and assembly pieces. 100%(sulfate wood pulp) thick board is characterized by its high density, good mechanical strength, low compression coefficient and high electric strength.
3 Available
Thickness: 0.10mm – 0.50mm
Both in roll and sheet are available
Width: 500mm – 1250mm
Special sizes are available on request
Different colours are available on request
Test project | Unit | AQL Value | Test Value | Test Mode |
Thickness tolerance | % | ±10 | -1.6 | JB/T8989.2-1999 IEC60641-2.1979 |
Density | g/cm3 | 1.00-1.20 | 1.08 |
Tensile strength | Length-wise | N/mm2 | ≥80 | 88 |
Cross-wise | ≥40 | 43.6 |
Elongation | Length-wise | % | ≥1.5 | 3.2 |
Cross-wise | ≥7.0 | 7.4 |
Shinkage | Length-wise | % | ≤1.0 | 0.92 |
Cross-wise | ≤1.5 | 1.4 |
Thickness-wise | ≤7.5 | 7.2 |
Ash content | % | ≤1.0 | 0.63 |
PH Value of aqueous extract | — | 6.0-9.0 | 7.1 |
Conductivity of aqueous extract | ms/m | ≤8.0 | 4 |
Oil absorption | % | ≥10 | 11.6 |
Electric strength in oil | KV/mm | ≥55 | 66.9 |
Moisture | % | ≤8.0 | 7.8 |
