How long is the carbon fiber heating wire in long-term high temperature environment?
Carbon fiber heating wire is composed of upper and lower layers such as heating conductor and insulating layer. It has the reputation of far-infrared heating wire and is widely used in the medical industry, hot compress products, health care products, electric towel racks, electric heaters, smart wear and other industries. , the reason for its widespread adoption is inseparable from its excellent performance and selling point
carbon fiber life
Compared with other alloy heating wire reinforced materials, the durability of carbon fiber materials is very strong. The national standard for the use of carbon fiber materials is 50 years, but in the actual use process, it will be found that the service life of carbon fiber materials must be more than 50 years, even in harsh conditions. In the construction environment, the performance of carbon fiber materials will not be disturbed, but here are high-quality carbon fiber materials. Although some low-quality carbon fiber materials have low market prices, they have serious quality defects. Strictly speaking, carbon fiber heating wires have a long service life. It can be used for more than 20 years when the heating temperature is not more than 150 degrees (limited to silicone carbon fiber material)
Insulation life
The insulation layer of carbon fiber heating wire is usually made of silicone rubber, PVC, Teflon, and some rarely used PE as the insulation material of the heating wire. At present, silicone rubber accounts for about 80 percent of the insulation layer of the heating wire, mainly because of the cost. Inexpensive, with superior heat resistance and cold resistance, PVC is generally only suitable for some low-end products, mainly because of its poor cold resistance and heat resistance, which is difficult to be accepted by manufacturers. The cost of Teflon is lower than the previous two materials. High, according to industry statistics, the average mission of Teflon is not less than 60 years. Even if it is buried in a humid underground environment, its molecular structure will not change within 50 years. At the same time, it has strong oil resistance and strong acid and alkali!
Other factors interfere
There are many reasons for determining the service life of the product, such as poor joints, unstable voltage, failure of the temperature control system, use and installation, exceeding the safety temperature warning line, etc. Any one of the reasons will lead to a decline in the lifespan, and serious burns will occur in a short period of time. bad possibility
How much do you know about the NTC positive temperature coefficient of carbon fiber heating wires?
In the last soft article, we talked about the PTC negative temperature coefficient of the alloy heating wire. In this issue, we talked about the NTC positive temperature coefficient of carbon fiber. Because the resistance of the metal will increase during the heating process, which will lead to a decrease in power, which is referred to as PTC negative temperature for short. Coefficient, this is the designed 20W product. Why does it change to only 17W after heating? Then carbon fiber is not a metal conductor. It is a semiconductor, a non-metal heating wire. Its heating principle is the heat generated by the collision of ions , so after he is heated, it will not cause its own resistance to become larger, but will become smaller. This behavior is understood in the industry as the NTC positive temperature coefficient value. The larger the power design, the higher the temperature, which will lead to positive The greater the numerical difference in temperature coefficient