Main Indexes Affecting the Properties of Insulating Materials
1. Insulation resistance and resistivity
The resistance is the reciprocal of the conductance, and the resistivity is the resistance within the unit volume. The smaller the conductive material is, the greater the resistance, the reciprocal relation between the two. For the insulating material, it is always hoped that the resistivity is as high as possible.
2. relative dielectric constant and dielectric loss angle tangent
The use of insulating materials is two: the mutual insulation of the components of the electric network and the medium of the capacitor (energy storage). The former requires a relatively low dielectric constant, which requires a relatively high dielectric constant, and both requirements of dielectric loss tangent is small, especially the application of insulating materials in high frequency and high pressure, the low dielectric loss require insulating material using small dielectric loss tangent.
3. Breakdown voltage and electrical strength
Under a strong electric field, the insulation material is destroyed and the insulation property is changed into conductive state, which is called breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). The electrical strength is the distance between the breakdown voltage and the two electrodes that withstand the applied voltage under the specified conditions, that is the breakdown voltage of the unit thickness. As far as insulating materials are concerned, the higher the value of the breakdown voltage and the electrical strength.
4. Tensile strength
It is the maximum tensile stress that the specimen bears in the tensile test. It is the most widely used and representative test for the mechanical properties test of insulation materials.
The ability of insulating materials to resist burning or to stop burning when they are exposed to flame. With the increasing application of insulating materials, the requirement of its combustion resistance is more important. People can improve and improve the combustion resistance of insulating materials by various means. The higher the combustibility, the better the safety.
6. Resistance to arc
Under the prescribed test conditions, the insulating material is resistant to the ability of the arc acting along its surface. In the test, AC high voltage and small current are used, and the arc action generated by high voltage between the two electrodes is applied to make the time needed to form the conductive layer on the surface of the insulation material, so as to judge the arc resistance of the insulation material. The higher the time value, the better the arc resistance.
7. seal degree
The sealing and isolation of oil and water is better. Since the founding of the company, for the industry users to provide excellent products and efficient services, consistent. We must adhere to technology research and development as the core, market and customer requirements as the guidance, business management and quality as the basis, and customer satisfaction as the goal, and strive to create corporate culture.