We all know that the inside of the electric heating tube needs to be filled with dry magnesium oxide powder and other fillers, these fillers have a certain hygroscopic properties.The filling material inside the damp electric heating tube will have surface conductivity, uneven heating, and even the phenomenon of tube explosion.Therefore, in order to avoid the filling material of the electric heating pipe being affected by moisture, we will seal the port of the electric heating pipe when we produce the electric heating pipe.So the sealing material of electric heating tube plays a very important role.So what are the characteristics of electric heating pipe sealing materials?
1, the material itself has a high degree of insulation and electrical strength.
2, the material source is extensive, the price is low.
3. It has similar thermal expansion coefficient with conductive lead rod and metal seamless sheath.
4, has a good sealing performance of water tightness and air tightness, this sealing performance is the best elastic seal.
5, its low hygroscopicity.
6, at the working temperature, long-term work is not aging.
7. High heat resistance.
8, the process is simple, easy to operate, can be suitable for mass production or flow production.
