Not only flame retardant, but also low smoke performance
As we all know, fires bring heavy casualties and property losses to people every year. According to statistics from the Fire Department of the Ministry of Public Security, a total of 125402 fires were reported across the country in 2014, with 1106 deaths and 572 injuries, and direct property losses of 1.88 billion yuan.
In order to reduce the harm caused by fire to the greatest extent, the first thing is to improve the flame retardancy of the products, reduce the possibility of fire and make the products become non-combustible materials. In the field of electronic and electrical, due to its special use environment, the fire resistance of materials has high requirements, and flame retardant modification should be added to flammable polymer materials, brominated flame retardant is the most important and effective one of the traditional flame retardants, because of its good flame retardant effect, small amount of addition, good compatibility, excellent thermal stability, small impact on the performance of flame retardant products, with price advantages and other advantages, the most common application in flame retardant modification. However, in the combustion process, the existence of brominated flame retardants reduces the anti-ultraviolet light stability of the flame retardant materials, and generates more smoke, corrosive gases and toxic gases during combustion. Moreover, brominated flame retardants are generally used in combination with antimony oxide, resulting in higher smoke production. Although the flame retardant polymer can reduce the risk of fire, it can not completely eliminate the fire risk. The flame retardant polymer can still burn violently in the fire. When a fire occurs, this kind of halogen-containing flame retardant material will produce a large amount of smoke and toxic corrosive hydrogen halide gas, causing secondary hazards.
Fire statistics show that 60-80% of the deaths in the fire are related to the smoke in the fire. We know that the combustion products have three forms: gaseous, liquid and solid. Among them, the liquid and solid products are suspended in the air to form smoke and dust. When the smoke containing a large amount of smoke and dust is inhaled by the personnel in the fire scene, it will adhere to the nasal cavity, oral cavity and endotracheal tube and enter the bronchi, even by diffusion can enter the lungs and adhere to the alveoli, serious when it will block the nasal cavity and trachea, resulting in insufficient lung ventilation, and eventually suffocation death. In addition, the fire smoke has a strong shielding use of visible light, which greatly reduces the visibility. At the same time, the hydrogen chloride, ammonia and chlorine in the fire smoke have a strong stimulation to the eyes, which makes people unable to open their eyes and seriously affects the speed of escaping from the scene. The large amount of smoke generated at the fire scene will make people feel horrible, panic, lose their minds, and cause chaos to the fire escape, which is very harmful. Therefore, "smoke" has become one of the most harmful killers in fire.
At the same time, the "smoke" of flame retardant materials has attracted more and more attention. The EU RoHs directive has restricted halogen flame retardants, and more and more attention has been paid to environmentally friendly and efficient flame retardant materials.
Industry such as plastic Yi'an®Series of products, take the compound halogen-free flame retardant formula system, flame retardant addition is low, the material performance retention rate is high, the amount of smoke is small when burning, does not produce toxic and corrosive gases. Plastic Yi'an®E4G10 glass fiber reinforced PBT brand, free of halogen, antimony oxide or red phosphorus, flame retardant up to UL94 V0 grade (1.6mm) ,1mm thickness sample through 960 ℃ GWFI glow wire test, CTI over 450V, smoke density is 24% of halogen-containing flame retardant compound combustion. Plastic Yi'an®A5G10, up to UL94 V0 (1.6mm),CTI greater than 550V, has high surface quality and meets laser printing. At present, the two materials have been successfully used in sockets, circuit breaker housings and other components by domestic OEM manufacturers and are welcomed by the market.
Shanghai Risheng Technology Co., Ltd.
Telephone:18721778701
E-mail:marketing@shsunny.com
Address: 619 Jinzhang Highway, Jinshan District, Shanghai
