Radiation cross-linking waterproof flame retardant polyolefin nano-composite material and preparation method thereof

Abstract

The invention discloses a radiation cross-linking waterproof flame retardant polyolefin nano-composite material and a preparation method thereof and is characterized in that 0.5-5 parts of inflaming retardant synergist is added to 75-80 parts of polyolefin according to the mass ratio, mixed fully at 140-200DEG C, then 20-25 parts of nitrogen and phosphorous mixed expandable flame retardant, 0.5-5 parts of multi-functional group cross-linking agent and 0.1-1 part of antioxidant are added, after being fully mixed, a radiation cross-linking material is extruded and granulated, then the material is extruded and coated on a conductor wire core of a wire or a cable, or is pressed into plates in a forming machine, and finally, a high energy electron beam or a cobalt source is used for radiation cross-linking in 80-240KGy; and the prepared cross-linking polyolefin nano-composite material has good flame retardant property, excellent mechanical property, good waterproof property and good processing property, can be widely applied to wires and cables and transmission belts and can be applied as insulation, sealing and mechanical protection layers of electronic components and metal pipelines, and has good application prospect.

Description

Technical field [0001] The invention belongs to the technical field of flame-retardant polyolefin materials, and particularly relates to an irradiation crosslinked water-resistant flame-retardant polyolefin nanocomposite material and a preparation method thereof. Background technique [0002] Cross-linked polyolefin materials have excellent mechanical and physical properties, electrical properties, high use temperature, corrosion resistance, and good heat resistance. They are being used more and more in the preparation of electricity, energy, petrochemical, electronics, communications, Wires and cables in the information, automotive and other industries are widely used in the preparation of mining conveyor belts, as insulation, sealing and mechanical protection layers for electronic components and metal pipelines. However, cross-linked polyolefins are easy to burn, and the resulting fire brings huge threats and losses to people's lives and properties. [0003] In order to solve th...

AI Technical Summary

Problems solved by technology

However, most of the intumescent flame retardants flame retardant polyolefins have the following disadvantages: First, their addition amount is still relatively large, their compatibility with the polyolefin matrix is ​​poor, and the damage to the mechanical properties of the cable material is still relatively large. Second, some intumescent flame retardant components have disadvantages such as easy moisture absorption, poor water resistance and weather resistance, and osmosis and precipitation will occur after long-term use, which not only reduces the flame retardancy and service life of the material, but also may cause safety problems such as fire hazards.

However, there has been no report on the application of microencapsulated flame retardants to cross-linked polyolefin materials.