flexible laminates is one of the key factors to determine the technical and economic indicators of motor and electrical appliances. One of the important technical and economic indicators of the motor is the mass power ratio, that is, the kg / kw value. Reduce the ratio, the motor has important significance. It is reported that from 1900 to 1967, 1hp (0.75kW) motor quality from 40kg to 10kg, has now been reduced to 6kg / kW level. An important reason for this change is the use of insulating materials with high heat resistance. Reduce the kg / kW value can save a lot of metal materials, reduce motor costs.
Such as a A-class (105 ℃) motor with H-class (180 ℃) insulation, can reduce the volume of 30% to 50%, saving copper 20%, silicon steel sheet 30% to 50%, cast iron 25%. Of course, using the same model machine, with a higher temperature index insulation material, can improve the power or extend the life of the motor. From the electrical, electrical products, the cost of the situation, the cost of insulating materials in about half of these are the insulating materials in the electrical, electrical industry, the status and role.