News
Insulating materials, also known as dielectrics, refer to materials that are non-conductive or extremely conductive under the action of DC voltage, and their resistivity is generally greater than 10 10 Ω·m. The main function of insulating materials is to separate charged conductors of different potentials in electrical equipment so that current can flow along a certain path. They can also provide mechanical support and fixation, as well as arc extinguishing, heat dissipation, energy storage, moisture resistance, mildew resistance, or improve the potential distribution of the electric field and protect the conductor. Therefore, insulating materials are required to have the highest possible insulation resistance, heat resistance, moisture resistance, and a certain mechanical strength.
18
2019
/
10
Insulation pad inspection cycle
Some insulation pad inspection cycles are one year, some are five years. The main basis is: the insulation pad is mainly made of glue insulation materials, made of non-polar rubber with excellent insulation properties such as NR, SBR and IIR.
17
2019
/
10
China's demand for insulation materials will grow year by year
The demand for insulation materials in the industrial and HVAC (heating, ventilation , and air conditioning ) equipment markets will grow by 8.4% annually over the next few years. Efforts to reduce energy consumption and costs in these applications will drive the growth of the insulation materials market.
17
2019
/
10
Development history of insulation materials
The earliest insulating materials used were natural products such as cotton, silk, mica, and rubber. In the early 20th century, industrial synthetic plastic phenolic resin first came out, which has good electrical properties and high heat resistance. Later, urea-formaldehyde resin and alkyd resin with better performance appeared one after another. The emergence of trichlorobiphenyl synthetic insulating oil made a leap in the specific characteristics of power capacitors (but it was later discontinued because it was harmful to human health). Sulfur hexafluoride was also synthesized during the same period.
14
2019
/
05
Applications of Insulating Materials
The function of insulating materials is to isolate the charged parts with different potentials in electrical equipment. Therefore, insulating materials should first have high insulation resistance and withstand voltage, and avoid accidents such as leakage and breakdown. Secondly, they should have good heat resistance to avoid aging and deterioration due to long-term overheating; in addition, they should also have good thermal conductivity, moisture resistance and lightning protection, high mechanical strength, and convenient processing. According to the above requirements, the performance indicators of commonly used insulating materials include insulation strength, tensile strength, specific gravity, expansion coefficient, etc.
14
2019
/
05