Low smoke halogen-free granulator | Low smoke halogen-free cable material granulator

Low smoke halogen-free granulator | Low-smoke halogen-free cable material granulator
Low-smoke halogen-free cable material granulator unit
Liter mixer cone double feeder single screw hydraulic automatic screen changer Cold grinding surface, hot cutting, first cyclone separator, second cyclone separator, extended air-cooled vibrating screen bin It is composed of magnesium hydroxide and some antioxidants added to improve the heat resistance life. Sometimes in order to reduce the amount of smoke produced when burning, some smoke inhibitors are added, such as vanadium nickel molybdenum iron silicon nitrogen compounds.
Its flame retardant mechanism is that when burning, the flame retardant filler aluminum hydroxide and magnesium hydroxide will release crystal water and absorb a large amount of heat. At the same time, the dehydration reaction will generate a large amount of water vapor, which can dilute flammable gases. This prevents combustion. In addition, a layer of non-melting and non-combustible oxide hard shell will be formed on the surface of the material, blocking the channel for the polymer to react with external hot oxygen. Ultimately, the material will be flame retardant and self-extinguishing.
Low-smoke halogen-free flame-retardant polyolefin cable materials must have good flame retardancy. The aluminum hydroxide and magnesium hydroxide in the formula must have a large filling amount, usually more than 100%, and an internal mixer is required to mix it. For better compatibility between materials and inorganic substances, single-screw cooling and granulation equipment is used to make materials, disperse the output, and reduce energy consumption.
The development prospects of halogen-free flame-retardant polyolefins
The influence of high-expansion and low-expansion graphite) on the limiting oxygen index. It can be seen from the content of expanded graphite that as the amount of expanded graphite increases, the oxygen content of expanded graphite increases. As the index continues to increase, the pure graphite can be more effective than the pure graphite. This is because at high temperatures, the volume of expanded graphite generated is larger than that of the product, occupying a larger space, which is more conducive to preventing the flammable gas produced by polymer cracking. The gas enters the combustion area and isolates oxygen more effectively. The role of expandable graphite is a physical mechanism, mainly the dense carbon layer forming a physical isolation layer, protecting the polymer under the carbon layer, and isolating heat and mass transfer.
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