Many customers will ask: Why is Flame Retardant modification so complicated? The following will tell you the complexity of flame retardant modification due to various reasons.
First, the combustion process is complex
Combustion has three conditions: combustible, combustion-supporting, and reaching the ignition point. Since combustibles have various phases (gaseous, liquid, solid, liquid with different vapor pressures, solids have compactness and looseness), the concentration and diffusion of the accelerant, and the high and low ignition points, the combustion process is very complicated. There are open and smoldering fires involved. In addition, the spread of fire is also a part of burning. Therefore, there are also many burning test modes, such as vertical burning, horizontal burning, glow-wire test, etc.
Second, the results and hazards of combustion are complex
Combustion produces burnout, high temperature damage, smoke impeding escape, and smoke poisoning.
Third, the flame retardant mechanism is complex
First, it involves gas phase flame retardant and condensed phase flame retardant. The gas phase involves the formation of flame retardant gas and the process of flame retardant reaction. The condensed phase is related to the char formation process and the char formation quality. In terms of flame retardants, it involves many flame retardants, including inorganic flame retardants and organic flame retardants, and organic flame retardants include halogenated flame retardants and halogen-free flame retardants. In addition, the synergy and compounding of different flame retardants is also an important content. The complexity of flame retardants is also reflected in the high filling content of flame retardants, which poses challenges to the mechanical properties and other properties of flame retardant materials, such as heat resistance and toughness.
Fourth, the processing application is complex
When the flame retardant is modified by melt blending, there is often a problem of thermal stability of the flame retardant, and thermal stability and flame retardancy are a pair of inherent contradictions. In addition, thin products, such as spun yarns, non-woven materials, flat yarns, films, etc., often have higher requirements on the particle size and content of flame retardants. Such as Intumescent Flame Retardant PP flat yarn, because the coating particle size is large, the flat yarn is often broken when it is stretched. When the PE cable material is flame retardant with aluminum hydroxide, if the aluminum hydroxide is not well dispersed, or the surface is subjected to large shear, the excessively high filling amount of the flame retardant will cause powder to fall off and form mold scale. When the sulfonate + PTFE flame-retardant light diffusing PC is extruded, if the PTFE coating is not good and the PTFE agglomerates, the surface of the extrudate will be pitted.
Fifth, the flame retardant regulations are complex
Flame retardant modification not only involves fire safety regulations, but also flame retardant toxicity and environmental pollution regulations, such as IEEE and UL's fire regulations and flame retardant grade certification, ROHS directives and REACH certification, etc., as well as governments and countries around the world. Various regulations of related enterprises, etc.
Novista Group supplies APP, MCA, aluminium hydroxide,magnesium hydroxide to global market.
