High-performance flame retardant polyethylene sheath material

Abstract

The invention discloses a high-performance flame retardant polyethylene sheath material. The polyethylene sheath material comprises, by weight, high density polyethylene, linear low density polyethylene, bimodal polyethylene, a polyolefin elastomer, an ethylene-vinyl acetate copolymer, maleic anhydride grafted polyethylene, powdery magnesium hydroxide, layered aluminum hydroxide, a flame retardantsynergist, magnesium stearate, silicone oil, an antioxidant, a melamine salt of cage phosphate, polyphenylether, silicone powder and a lubricant. The halogen-free efficient flame-retardant polyolefincable material has the advantages of reduction of the addition amounts of the magnesium hydroxide and aluminum hydroxide, great improvement of the flame retardant efficiency of the hydroxides, reduction of the influences of the addition of the flame retardant on mechanical properties, good tensile strength of 15 MPa, and excellent elongation at break.

Description

technical field [0001] The invention relates to a polyethylene insulating material, in particular to a high-performance flame-retardant polyethylene sheathing material. Background technique [0002] With the development of the economy, the places where cables need to be used have become diversified, and there are more stringent and diverse requirements for the performance indicators of cable sheath materials, such as insulation, tensile strength, service temperature, flame retardant performance and other indicators There are strict requirements, and the continuous improvement of the performance of the sheath material is an urgent need for economic and social development. Ordinary polyethylene sheath materials are generally composed of several polyethylene resins, antioxidants, lubricants and carbon black in a certain proportion, and then pelletized by twin-screw extrusion, with high tensile strength and elongation at break. Elongation, good extrusion fluidity, wide processi...

AI Technical Summary

Problems solved by technology

[0003] Ordinary polyethylene sheath materials are flammable materials, which bring a lot of inconvenience to actual use, and even threaten the safety of people's lives and property. However, the flame-retardant polyethylene sheath materials on the market have poor flame retardancy, and the mechanical properties of polyethylene For example, the tensile strength and elongation at break drop seriously, and there are also problems such as poor fluidity, poor processability and slow extrusion speed.