Overview of the Development of the Insulation Paper Industry Market
The definition of electrical insulation materials is in accordance with the national standard GB2900. 5: “Materials used to electrically insulate the device”. That is, materials that can block the flow of electric current. The insulating materials are classified into solid insulating materials, liquid insulating materials, and gas insulating materials. Paper insulating materials are solid insulating materials and are widely used in electrical equipment such as wires and cables, transformers, and capacitors.
Insulating crepe paper has a long history as an insulating material for electrical equipment. Before the 20th century, insulating materials were basically derived from natural materials or their products. In order to improve the water resistance and the like, a natural resin such as shellac is used for dipping with vegetable oil or asphalt. At the beginning of the 20th century, due to the development of organic synthesis and polymer chemistry, humans made the first synthetic polymer-phenolic tree tire, which is also an important invention in the field of insulating materials.
A large number of synthetic polymers and resins were greatly increased from the 1920s to the 1950s. These polymers are widely used in motors to improve the heat resistance, electrical performance and safety of the motor. However, synthetic polymers must be applied with volatile organic chemicals (solvents, thinners, etc.).