What does halogen-free control mean?

Halogen halogen and its compound halogen (halogen) are group ⅶ A nonmetallic elements, including fluorine-,chlorine, bromine, iodine and astatine, collectively referred to as halogen. Among them, astatine is a radioactive element, and halogen is usually called fluorine, chlorine, bromine and iodine. Halogen compounds are commonly used as flame retardants: PBB, PBDE, TBBP-A, PCB, hexabromododecane, tribromophenol, short-chain chlorinated paraffin, etc. , used in electronic components and materials, product shells, plastics, etc. This kind of flame retardant can't be recycled, and it will release harmful substances during burning and heating, threatening human health, environment and future generations. Jeston Jietong Company can provide accurate and effective test reports to help you realize halogen-free products. Harm and limit the addition of halogen (fluorine, chlorine, bromine, iodine) in polymer products such as plastics to improve the ignition point. Its advantages are that the ignition point is higher than that of ordinary polymer materials, and the ignition point is about 300℃. Halogenated gases (fluorine, chlorine, bromine and iodine) will be released during combustion, and oxygen will be absorbed quickly, thus extinguishing the fire. However, its disadvantage is that when the concentration of chlorine gas released is high, the visibility will be reduced, resulting in the inability to identify the escape route. At the same time, chlorine is very toxic, which affects people's respiratory system. In addition, the combination of halogen gas released by halogen-containing polymer combustion with water vapor will produce corrosive harmful gas (hydrogen halide), which will cause corrosion to some equipment and buildings. Brominated flame retardants such as PBB, PBDE and TBBPA are widely used at present, mainly in electronic and electrical industries, including circuit boards, computers, fuel cells, televisions and printers. These halogen-containing flame retardant materials will produce dioxins when burning, which can exist in the environment for many years, even accumulate in organisms for life and cannot be discharged. Therefore, many large international companies are actively promoting the complete abolition of halogen-containing materials, such as prohibiting the use of halogen flame retardants in products. At present, different products have different limit standards for halogen-free requirements: for example, the halogen index of halogen-free wires and cables is: the value of all halogens is 50PPM (according to the regulation PREN14582); The content of hydrogen halide gas produced after combustion is < < 100PPM (according to the provisions of EN 5067-2- 1); The hydrogen halide gas produced after combustion has a PH value of ≥4.3 (weak acidity) after being dissolved in water (according to the provisions of EN-5 0267-2-2); After the product is burned in a closed container, it passes through a beam of light, and its transmittance is ≧60% (according to the provisions of EN-50268-2). Halogen-free requirements: the contents of bromine and chlorine are less than 900ppm respectively, and (bromine+chlorine) is less than 1500ppm.