【 Weak current College 】 flame retardant polypropylene material classification analysis-basic knowledge of the details--Power By 【 China power house network 】

Flame retardant polypropylene material can be divided into the following five categories: ① halogen-and antimony system, i.e. gas flame retardant mechanism. Commonly used is halogen-free flame retardant decabromodiphenyl ether, six bromide hexabromocyclododecane, bddp, tetrabromobisphenol-a, and so on, plus the flame synergistic agent antimony trioxide with ⑵the, flame-retardant effect is good. But halogen flame retardant class has been impugned green environmental protection organizations, as well as in some countries subject to restriction, the banned use. However, the United States, Japan and other countries still allow the use, as a developing country, China, halogen-free flame retardants in the life of at least 10 years. ② containing bromide alkyl phosphate to PP. This type of flame retardants and PBr synergy, so that the flame effect significantly while improving PP rheology and processing performance, physical and mechanical properties of the PP is also small. ③ for nearly a decade in PP flame-retardant technology to Italy Turin University Professor Camino's first intumescent flame retardant played a huge role in this class PN retardant high efficiency, high heat and light stability, low toxicity and low smoke, low corrosion, impact on processing and mechanical properties, do not cause environmental pollution. In pp just add 2530 copy to reach UL94V0 level. China has just intumescent flame retardant products. ④ acrylate benzyl PentaBDE and EPDM rubber of flame retardant polypropylene copolymer. This type of fire-retardant treatment of PP with high impact strength, on certain occasions can be used as an engineering plastic. ⑤ inorganic filler flame retardant pp so-called inorganic filler is the aluminum hydroxide and magnesium hydroxide, they have fire-retardant and smoke suppression. But to achieve the desired effect, particle and surface treatment is the key technology, applied to different plastics. Caution selecting matching of surfactants, and compatibility with plastics and plastics to evenly disperse, without too greatly impact plastic mechanical properties. As a result of ATH and magnesium hydroxide in different temperature ranges up to the flame and smoke suppression, so they can make use of mixed plastic in wide temperature range play continuous flame effect. Here it is emphasised that in dealing with magnesium hydroxide PP, to achieve better fire-retardant effect and appropriate mechanical properties, add magnesium mixing technology, the use of the second step of the way of feed, which will be more than one feed to better results.