Halogen-free flame retardant glass fiber reinforced nylon as well as preparation method and application thereof

Abstract

The invention belongs to an electricity & electronics industry, and provides halogen-free flame retardant glass fiber reinforced nylon. The halogen-free flame retardant glass fiber reinforced nylon is prepared from the following materials in percentage by weight: 30 to 50 percent of PA66, 3 to 15 percent of amorphous nylon, 14 to 25 percent of a halogen-free flame retardant, 30 to 40 percent of glass fiber, 0.1 to 0.5 percent of a lubricating agent, 0.2 to 0.6 percent of an antioxidant and 0.2 to 0.5 percent of a nucleating agent, wherein the halogen-free flame retardant is a composition of alkyl aluminum phosphate (OP), zinc borate and melamine pyrophosphate (MPP). A preparation method, provided by the invention, of the halogen-free flame retardant glass fiber reinforced nylon comprises the following steps: adding all the raw materials into a high-speed stirring machine for full and uniform mixing; after the raw materials are completely mixed, conveying the materials into a double-screw extruder through a metering material conveying device, setting the temperature of each region to be 240 to 285 DEG C, fully fusing the materials under shearing, mixing and conveying of screws, and finally performing extrusion, drawing and cooling to prepare a granular finished product. The halogen-free flame retardant glass fiber reinforced nylon provided by the invention is high in flame retardancy under an OP and MPP compound system, and the problem of separation out of the flame retardant under a wet environment is solved.

Description

technical field [0001] The invention belongs to the electric appliance industry, and relates to a preparation method and application of a halogen-free flame-retardant glass fiber reinforced nylon. Background technique [0002] Nylon (PA) is one of the five engineering plastics with the largest output, the most varieties, and the widest uses. PA has high mechanical strength, high softening point, heat resistance, wear resistance, oil resistance, weak acid resistance, alkali resistance and general organic solvent resistance, good electrical insulation and self-extinguishing property. PA is widely used in various fields such as automobile industry, electronic and electrical industry, transportation, machinery, aerospace and so on. [0003] In recent years, semi-crystalline low-melting PA66 has been widely used in the fields of electronics, electricity, communication, etc. However, these fields have higher requirements for the flame retardancy of materials. PA66 reinforced wit...

AI Technical Summary

Problems solved by technology

[0005] However, these patents mainly describe the high flame retardant performance of glass fiber reinforced PA66 obtained under the compound system of OP and MPP, but do not disclose the problem of flame retardant precipitation of the compound flame retardant system in a humid environment

Images