Low-smoke halogen-free cable refers to the environment-friendly cable without halogens (F, Cl, Br, I, At), lead, cadmium, chromium *** and other environmental substances, which will not emit toxic smoke during combustion (such as hydrogen halide, carbon monoxide, carbon dioxide, etc.).

● where the halogen pointer is: the values of all halogens are ≦50PPM(according to regulation PREN 14582)

● the content of hydrogen halide gas produced after combustion < 100PPM(according to regulations en5067-2-1)

● the PH value of hydrogen halide gas produced after combustion after dissolving in water ≥ 4.3(weak acidity) (according to regulations en-50267-2-2)

● the transmittance of the product through a beam of light after combustion in an airtight container ≥ 60%(according to code en-50268-2)

● Pb < 90PPM, Cd, Cr6+, Hg, PBBs, PBDEs are less than 5PPM

Characteristics of low-smoke halogen-free wire:

(1) higher tensile strength than ordinary PVC wires: the tensile strength of ordinary PVC wires is greater than 1.05Kgf/mm2, while the tensile strength of low-smoke halogen-free wires is greater than 1.2Kgf/mm2;

(2) good weather resistance (-30℃~105℃);

(3) good softness (hardness 80-90);

(4) it is non-shifting (because plasticizer is not added in the formula of this product, so there is no shifting);

(5) no toxic black smoke will be generated during combustion (a small amount of white smoke will be generated);

(6) have high volume resistivity: PVC wire is commonly 1012 ~ 1015 Ω/cm3, low smoke zero halogen wire is greater than 1016 Ω/cm3;

(7) good high voltage resistance: PVC wires are generally resistant to more than 10KV, while low-smoke halogen-free wires are generally resistant to more than 15KV;

(8) good elasticity and viscosity.

3. Low-smoke, halogen-free wire ingredients:

(1) linear PE and elastic PE were selected as the main resins, and three metal oxides containing crystalline water were selected as flame retardant materials: crystalline water was lost at 200℃, 300℃ and above 300℃, respectively.