1, insulation resistance and resistivity
Resistance is the conductance of reciprocal resistance in unit volume resistivity. The conductive material is smaller, its resistance increases, both the reciprocal, of insulating material, always hope that the resistivity is as high as possible.
2, the breakdown voltage and electrical strength
Insulation material damage occurred in a strong electric field, lose insulation performance becomes conductive state, known as the breakdown. When the breakdown voltage is called breakdown voltage (dielectric strength). Electrical strength is the distance of two electrode breakdown occurs under specified conditions of voltage and under applied voltage between the business, is also the breakdown voltage of unit thickness under. PVC tell you the insulating tape for the insulation materials, the breakdown voltage, the electrical strength value is good.
3, tensile strength
In the tensile test, the maximum tensile stress. It is the test of insulation test application performance of mechanics of materials, the most extensive and most representative.
4, burning resistance
The insulation material flame resisting ability to prevent contact of combustion flame or leave. With the increasing application of insulating materials, the burning resistance requirement is more and more important, people through various means, and improve the insulation resistance to fire. Burning resistance is high, its safety is better.
5, the relative dielectric constant and dielectric loss tangent
The use of insulating material has two components: electric network and mutually insulated dielectric capacitors (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.
6, arc resistance
Under the specified test conditions, the ability of the insulating materials arc along the surface of the tolerance. The test adopts AC high voltage and low current, high voltage arc borrow in two between the electrodes, the insulating material is formed on the surface of the conductive layer of the time required to determine the arc resistance of insulating material. Time value is, the better the arc resistance.
Good for oily, water seal.
The above is the PVC insulation band affect the performance of insulation material