Halogen-free low-smoke high-flame-retardant high-oxygen-isolation cable material for power cable, and preparation method thereof

Abstract

The invention relates to the technical field of chemical engineering, particularly to a halogen-free low-smoke high-flame-retardant high-oxygen-isolation cable material for a power cable, wherein thehalogen-free low-smoke high-flame-retardant high-oxygen-isolation cable material comprises the following components in parts by weight: 85-100 parts of a base material, 10-15 parts of engineering master batch, 150-180 parts of a flame retardant, 30-50 parts of a synergistic flame retardant, 10-20 parts of a shell forming agent, 0.9-1.5 parts of an antioxidant, 4-5 parts of a lubricant, 1-2 parts of a coupling agent, and 0.06-0.1 part of a cross-linking agent. The preparation method comprises the following steps: dissolving a cross-linking agent in a coupling agent; adding other components excluding a base material and engineering master batch into a high-speed mixer, stirring at a high speed for 10 minutes, and controlling the temperature at 60 DEG C; and adding the stirred material, the base material and the engineering master batch into an internal mixer, discharging the material when the temperature of the internally mixed material reaches 145-150 DEG C, performing double-cone forced feeding, and granulating by a double-screw single-screw double-stage extruder to obtain the halogen-free low-smoke high-flame-retardant high-oxygen-isolation cable material for the power cable.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a halogen-free, low-smoke, high-flame-retardant, high-oxygen barrier cable material for power cables, and a preparation method thereof. Background technique [0002] my country has developed into the world's largest wire and cable manufacturing country. As people pay more attention to the environment, the application of halogen-free low-smoke flame-retardant products is becoming more and more extensive. With the upgrading of products, the requirements for flame retardant are also rising, especially for power cables. After the Okay incident, the industry has more and more requirements for low smoke performance and flame retardant performance of halogen-free low-smoke flame-retardant cable materials. The higher the flame retardant level, the higher the requirements are, the most obvious is the inner layer of the flame retardant sheath, plus a layer of oxygen barrier refra...

AI Technical Summary

Problems solved by technology

For mineral insulating materials, such as filled with oxygen barrier mud, the flame retardant and fire resistance are excellent, and can even meet many harsh conditions, but it also has disadvantages, that is, the extrusion process is difficult to meet the modern commercial market, the extrusion is slow, and the forming is not good. , which has a great influence on the final squeezing of the sheath

For fire-resistant tape, such as fire-resistant mica tape, it can be well coated on wires and cables, but the flame-retardant and fire-resistant effect is not very good, so it is only suitable for power cables with low requirements for flame-retardant and fire-resistant grades

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