What are the differences between environmentally friendly cables and low-smoke halogen-free cables?
In many places in the project, such as fire protection, monitoring, alarm and other places, low-smoke and halogen-free cables are used. Usually people call them environmentally friendly cables. In fact, environmentally friendly cables do not refer to low-smoke and halogen-free cables. The following is environmental protection Detailed analysis of the difference between cables and low-smoke halogen-free cables:
一、What is an environmentally friendly cable?
Environmentally friendly cables refer to those that do not contain heavy metals such as lead, cadmium, hexavalent chromium, mercury, etc., and do not contain brominated flame retardants. After being tested by a third-party testing agency for environmental protection performance, they comply with the EU Environmental Protection Directive (RoSH) and are higher than its indicators. . Wires and cables that do not produce harmful halogen gas, do not produce corrosive gas, generate less heat when burned, and do not pollute the soil.
二、 Analysis of environmentally friendly cables and low-smoke halogen-free cables:
1. Halogen free:
The use of green environmental protection insulation layer, sheath and special oxygen barrier material not only has good electrical properties, physical and mechanical properties, but also ensures that the product does not contain halogen, solves the "secondary pollution" formed when it burns, and avoids When traditional PVC wires burn, they produce carcinogenic "dioxin" substances.
2. High flame retardancy:
Environmentally friendly cables fully guarantee the high fire protection requirements of buildings. In the event of a fire, the cables are not easy to burn, and can prevent the spread of flames and the expansion of disasters after burning.
3. Low toxin:
The insulation and sheath do not contain heavy metals such as lead and cadmium that are harmful to the human body, and will not pollute soil and water sources during the use of the cable or when the cable is worn out and discarded.
4. No corrosive gas:
Using new special coating materials, no HCL and other gases will be produced during production, use and combustion, and the emission of acid gas is less, causing less damage to personnel, equipment and instruments, and more environmentally friendly.
5. Waterproof and UV protection:
The use of green and environmentally friendly materials with a special molecular structure can ensure the ultra-low water absorption of the cable. Using a special UV absorber can ensure that the product has a good UV protection function. Guaranteed the prolongation of the service life of such products. It was a Japanese company that first initiated the name of "environmental protection cable". The product standard it formulated was the FN (Ecomaterial) ecological cable standard. In western countries, the United Kingdom also formulated advanced environmental protection cable standard requirements, which gradually spread to the world.
6. High light transmittance:
The smoke generated when the cable burns is relatively thin, which is conducive to the evacuation of personnel and the progress of fire fighting. It is much higher than the standard of less than 20% light transmittance of traditional flame retardant cables.