Hebei Messi Biology Co., Ltd. stated that magnesium hydroxide is a new type of filling flame retardant. It releases bound water when decomposed by heat and absorbs a large amount of latent heat to reduce the surface temperature of the synthetic material it fills in the flame. It has the function of inhibiting the decomposition of polymers and cooling the generated combustible gases. Magnesium hydroxide is recognized as an excellent flame retardant with triple functions of flame retardancy, smoke suppression and filling in the rubber and plastic industry. At present, in the field of communication cables, the use of inorganic flame retardants in foreign countries such as the United States, Japan, and the European Union exceeds 64%, while China only accounts for 8%.
At present, the raw materials used to extract magnesium hydroxide are mainly brucite ore. A large number of brucite ores in my country are mainly in Dandong, Northeast China, and the purity of magnesium hydroxide in the original ore is only 95%, which can only be used as a low-end flame retardant, such as in the materials of subway seats and carriages. In high-end insulating materials, the purity of magnesium hydroxide must reach more than 99% to meet the requirements. Taking optical fiber as an example, the diameter of the optical fiber core and cladding are both micrometers, which is equivalent to human hair, and there are high requirements for tensile strength and processing performance. Therefore, it is necessary to strictly control the morphology, particle size and other parameters of magnesium hydroxide flame retardant.
For a long time, magnesium hydroxide flame retardant has been a high-end product in my country, which is basically blank. my country imports about 30,000 tons each year, mostly used by foreign-funded enterprises in China, mainly used in high-end materials such as communication equipment, high-speed rail insulation materials, nuclear power plant wires and cables and other fields.
What kind of products meet the requirements of high-end magnesium hydroxide flame retardant products? Simply put, only the precise control of the four parameters of morphology, particle size, purity and whiteness is achieved. At present, the high-end magnesium hydroxide flame retardant market is still mainly monopolized by manufacturers from the United States, Japan and Israel. At present, Hebei Messi Biology Co., Ltd. has successfully mastered the core process of preparing magnesium hydroxide flame retardant products, and is gradually breaking the monopoly of high-end magnesium hydroxide flame retardants by foreign manufacturers.