The material of flame retardant polypropylene can be divided into the following five categories:

The mechanism of halogen-antimony is the mechanism of flame retardation. Common phosphorus-containing flame retardants is ten pbdes, hexabromocyclododecane, eight bromine ether, tetrabromobisphenol A, etc., coupled with flame retardant agent antimony trioxide, association with adding quantity is little, flame retardant effect good characteristic. However, halogen flame retardants have been criticized by green environmental groups, so that some countries have been restricted and banned. However, countries such as the United States and Japan still allow the use of halogen flame retardants, a developing country, for at least a decade or more.

The PP is treated with bromoalkyl phosphate. This kind of flame retardant has the PBr synergistic effect, which makes the flame retardant effect significantly, while also improving the rheological and processing properties of PP, and has little influence on the physical mechanical properties of PP.

(3) in the past decade, in PP flame retardant technology in Turin, Italy, a professor at the university of Camino pioneering expansion type flame retardant has played a huge role, this kind of PN series flame retardant with high efficiency, high thermal and light stability, low toxicity, low smoke, low corrosion, small effects on processing and mechanical performance, can not cause environment pollution. The UL94V0 level can be reached at the level of 2530 in PP. We have the production report of the expanded flame retardant products in China.

Polypropylene, flame retardant of graft copolymer of PBR and triethyl propylene rubber. These fire-retardant treatments have high impact strength and can be used as engineering plastics in some situations.

The so-called inorganic fillers of flame retardant polypropylene are referred to as aluminum hydroxide and magnesium hydroxide, which have the effect of flame retardant and smoke suppression. But to achieve the desired effect, particulate and surface treatment are key technologies applied to different plastics. It is important to choose a suitable surfactant so as to make it compatible with plastic and distribute it evenly in the plastic without affecting the mechanical properties of plastic. Since ATH and magnesium hydroxide can act as flame retardants in different temperature ranges, the combination of the two can cause the plastic to play a continuous flame retardant effect within the wider range of temperature. Here is to emphasize that when deal with PP with magnesium hydroxide, to achieve a better flame retarding effect and suitable mechanical properties, adding magnesium hydroxide in the mixing process, appropriate USES two-step feeding way, it will get better results than a charging.