How to identify the quality of insulating cardboard?

Whether the insulating paper is of high quality determines whether it can work normally, and high-quality insulating paper also has a good insulation effect. So, what conditions should the insulating paper meet? Below, we will answer it for you.

1. It should have strong combustion resistance.

When the insulating material contacts the flame, it has a stronger ability to resist burning or prevent continued burning when leaving the flame, because the higher the burning resistance, the better its safety.

2. High-quality insulation paper should have high insulation resistance and resistivity.

Resistance is the reciprocal of conductivity, and resistivity is the resistance per unit volume. The smaller the conductivity of the material, the greater its resistance, and the two have a reciprocal relationship. For insulating materials, it is always hoped that the resistivity is as high as possible.

3. It should have good tensile strength.

In the tensile test, the sample is subjected to a large tensile stress, and this is a very widely used and very representative test for the mechanical properties of insulating materials.

In addition, excellent insulating paper should also have good arc resistance. The ability of insulating paper to withstand arc action along its surface under specified test conditions. During the test, AC high voltage and small current are used to judge the arc resistance of the insulating material by using the arc action generated by the high voltage between the two currents to form a conductive layer on the surface of the insulating material. The greater the time value, the arc resistance. The better.

It is a roll-shaped insulation material made of alkali-free glass fiber cloth used by electricians as reinforcing material, bonded with high-temperature silicone resin, and processed by high-temperature baking, drying and pressing. The finished paper roll is dry, non-adhesive, and has good bending and softness. Compared with soft boards, it has stronger tensile strength. Compared with strip-type insulation materials, its thickness is increased and its single layer is resistant to voltage breakdown. More capable. It has excellent electrical insulation properties and high temperature resistance, and is especially suitable for high-temperature insulation of various industrial electric furnaces, power frequency furnaces, refining furnaces, intermediate frequency furnaces, calcium carbide furnaces, submerged arc furnaces, ferroalloys, electric arc furnaces, etc. in the steel, metallurgy and other industries.