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

 Packing:
- In solid pallet with protective film inside
- Wooden cases dimensions: As per rods size
- Weight: About 500 kgs per cases

Delivery Time:
1) Within 15 days after receipt of full payment
2) For L/C: As per quantity of order

For detailed technical information, please check files in download section or freely contact us.