What is insulating material? What are the main ones?

A epoxy glass laminate sheet that isolates the charged body from other parts of the electrical equipment. Commonly used solid materials are insulating sleeves. Insulating paper, laminates, rubber, plastic, paint, glass, ceramics, mica and so on. Commonly used liquid materials are transformer oil. Gaseous materials in the air, nitrogen, sulfur hexafluoride and other use more. The following are the same as the "
Insulation material: Resistivity of 109 ~ 1022 Ω • Cm material composition of the mica insulation sheets in the electrical technology known as insulating materials, also known as dielectric. Simply means that the charged body and other parts of the material isolation. Insulation material on the DC current has a very large resistance, under the action of DC voltage, in addition to a very small surface leakage current, in fact, almost non-conductive, and for the AC current capacitor current through, but also that is not Conductive. The greater the resistivity of the insulating material, the better the insulation performance