Precipitation-free, low-water-absorption, halogen-free and flame-retardant reinforced nylon 66 as well as preparation method and application thereof

Abstract

The invention discloses precipitation-free, low-water-absorption, halogen-free and flame-retardant reinforced nylon 66 as well as a preparation method and application thereof. The reinforced nylon 66 comprises the following components: nylon 66 resin, a halogen-free flame retardant, a synergist, glass fibers, an anti-precipitation agent, a nucleating agent, a dispersing agent, a lubricating agent and an antioxidant. The preparation method comprises the following steps: adding the nylon 66 resin into a main material scale, adding the halogen-free flame retardant, the synergist, the anti-precipitation agent, the nucleating agent, the dispersant, the lubricant and the antioxidant into a mixer for mixing, adding an auxiliary material scale, adding the glass fibers into a side feeding metering scale, starting a double-screw extruder, sequentially starting a main material metering extruder and an auxiliary material metering extruder, performing discharging, starting a side feeding metering extruder, performing heating, melting, blending and extruding in the double-screw extruder, and performing cooling and granule cutting to obtain high-strength plastic. The reinforced nylon 66 has the advantages of high strength, high flame retardance, no precipitation, low water absorption, stable size, no toxicity and environment friendliness. The method is simple in process, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a flame-retardant reinforced nylon 66 and its preparation method and application, in particular to a non-precipitation, low water absorption and halogen-free flame-retardant reinforced nylon 66, its preparation method and its application. Background technique [0002] Flame retardant reinforced PA66 is widely used in electrical, electronic and electrical structural components due to its excellent mechanical properties and heat resistance. In the last century, brominated flame retardants were used in the manufacture of flame-retardant reinforced PPA66 composite materials. Brominated flame retardants have been widely used because of their good flame-retardant effect, low dosage, and small impact on the mechanical properties of composite materials. Because brominated flame retardants will produce dioxins during combustion, causing serious pollution to the environment, the European Union issued environmental regulations at the begi...

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Problems solved by technology

As a result, the size of the component changes; at the same time, the migration of water molecules in the PA66 resin greatly promotes the migration of l

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