Heat-resistant environment-friendly flame-retardant cable insulation material and preparation method thereof

Abstract

The invention discloses a heat-resistant environment-friendly flame-retardant cable insulation material and a preparation method thereof. The heat-resistant environment-friendly flame-retardant cableinsulation material is prepared from polyvinyl chloride resin, a heat-resistant plasticizer, a flame retardant, a heat stabilizer, a filler, an antioxidant, a processing aid, a lubricant and a coloring agent, and the heat-resistant plasticizer comprises trioctyl trimellitate and / or tridecyl trimellitate. The cable insulation material disclosed by the invention is suitable for photovoltaic wires and cables and building wire high-end cotton covered wires, can resist the temperature of 125 DEG C, is a thermoplastic cable insulation material, has excellent heat resistance and flame retardance, hasexcellent processing technology performance and mechanical performance, can ensure fixed laying and use of the cables at the temperature of -40 DEG C to 125 DEG C, and is low in cost. According to acable made of the cable insulation material, the working temperature of the cable made of a common cable insulation material can be expanded to 125 DEG C from not lower than 70 DEG C or 105 DEG C, theflame retardant grade is improved to bunching combustion from single vertical combustion, and the environmental protection requirement meets the European Union standard requirement.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a heat-resistant, environment-friendly and flame-retardant cable insulating material and a preparation method thereof. Background technique [0002] At present, the highest temperature-resistant grade of PVC cable insulation materials on the market is 105°C, and polyolefin cable insulation materials are used for environmentally friendly cable insulation materials with higher temperature-resistant grades. Among them, there are two kinds of insulating materials with a heat resistance of 125°C: one is a polyolefin material cross-linked by radiation, and the other is a polyolefin material cross-linked by two-step silane. However, the extrusion speed of irradiated cross-linked polyolefin materials is slow, and the production efficiency is not high, and after the wire is made, it needs to be irradiated to reach the 125°C level, the process is complicated, and the cost of irr...

AI Technical Summary

Problems solved by technology

However, the extrusion speed of irradiated cross-linked polyolefin materials is slow, and the production efficiency is not high, and after the wire is made, it needs to be irradiated to reach the 125°C level, the process is complicated, and the cost of irradiation equipment is high; Silane-crosslinked polyolefin materials need to be divided into two steps to achieve crosslinking. The process is relatively complicated. The cable insulation material needs to be extruded separately to make materials, and then mixed when producing wires and cables. The produced cables must be boiled or steamed. cross-linking reaction

In short, the use process of cross-linked cable insulation materials is complicated and the cost is high. It is difficult to recycle the material after cross-linking. In addition, it is difficult to make cross-linked polyolefin materials into high flame-retardant grades.

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