High mechanical applications, suitable as structural parts for electrical equipments.
1. Insulation materials Insulation rods 3721 Phenolic cotton rods .
2. 3721 Phenolic cotton rods are are made of insulating cotton cloth impregnated phenolic resin by moulding and processing under heat and pressure .
3. 3721 Phenolic cotton rods has high mechanical applications .
4. 3721 Phenolic cotton rods can be processed into all kinds of insulation parts , The products are widely used transformers, electric motors, cabinets, control boxes, electric switches, railway, automobile and medical appliance,etc.
5.The size of 3721 Phenolic cotton rods :
Diameter:10-200mm
Length:1000mm
6.The company passed ISO9001 quality system.
7.The materials has Rohs test report.
|
No.
|
Item
|
Units
|
Value
|
|
3721
|
|
1
|
Applicable Standards
|
—
|
JB889-75
|
|
2
|
Density
|
g/cm³
|
1.25~1.45
|
|
3
|
Bending strength perpendicular to laminations
|
MPa
|
117.6
|
|
4
|
Tensile strength
|
MPa
|
78.4
|
|
5
|
Impact strength
|
MPa
|
—
|
|
6
|
Insulation resistance
Impregnated in water
|
Ω
|
1.0×108
|
|
7
|
Voltage endurance parallel to lamination (in oil 20±2°C)
|
kV
|
10.0
|
|
8
|
Water absorption
Thickness 13mm
Thickness 25mm
Thickness >25~51mm
|
mg
|
1.0(%)
|
|
9
|
Temperature index
|
°C
|
120
|
