Fireproof and flame-resistant composite material used for locomotive bellows, and preparation method thereof

Abstract

The invention discloses a fireproof and flame-resistant composite material used for locomotive bellows, and a preparation method thereof. The fireproof and flame-resistant composite material is a nylon66 modified phosphorus-free flame-resistant nylon6 composite material, and comprises, by weight, 35-70 parts of nylon6, 10-35 parts of a thermoplastic polymer B, 8-23 parts of a nitrogen series flame retardant, 0-3 parts of a synergistic flame retardant, 2-5 parts of a flexibilizer, and 0.1-2.5 parts of an antioxidant, a lubricant, a mold lubricant and a stabilizer. The nylon66 modified phosphorus-free flame-resistant nylon6 composite material prepared through the method reaches UL-94V0 grade flame retardation, and finished bellows pass DIN5510-2 destroy length test, and have excellent mechanical performances.

Description

technical field [0001] The invention relates to a fire-resistant and flame-retardant corrugated pipe material applied to rail locomotives and high-speed railway rolling stock, in particular to a fire-resistant and flame-retardant composite material used for locomotive bellows and its preparation method. The material is a thermoplastic polyamide composite material. Background technique [0002] Corrugated tubes, also known as wire harness bellows, are generally used on wiring harnesses such as construction machinery and automobiles to protect the wire sheath from damage, and at the same time reduce the adverse effects of sunlight, chemicals and other environments on the wire. Common bellows materials are metal and plastic, among which plastics include PVC, nylon, PE and other materials. Metal bellows have high strength, but poor flexibility, poor insulation, no resistance to chemical corrosion, and high cost; plastic bellows are cheap, easy to process, chemical-resistant, an...

AI Technical Summary

Problems solved by technology

[0005] For the halogen-free flame-retardant modification of nylon materials, the relatively mature technology is to use nitrogen-based or phosphorus-based flame retardants. Phosphorus-based flame retardants can only be used to make red or black products due to their own color, and are compatible with nylon. Poor properties will greatly reduce the physical properties and processing properties of the material, and even make extrusion processing difficult

Nitrogen-based flame retardants have good compatibility with nylon and can be used in any color matching, but adding them will reduce the thermal stability of the base material, which will cause problems for modification processing and subsequent production products

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