High-toughness electric wire protecting jacket material and preparation method thereof

Abstract

The invention provides a high-toughness electric wire protecting jacket material and a preparation method thereof. The high-toughness electric wire protecting jacket material is prepared from the following components: butadiene rubber, an ethylene-vinyl acetate copolymer, a composite filler, a composite additive, carbon black, modified calcium carbonate, diphenyl isophthalate, paraffin, aluminum oxide, stearic acid metal salt, silicone oil, a cross-linking agent and an antioxidant. The protecting jacket material prepared by the invention has good toughness, heat resistance, abrasive resistance, aging resistance ultraviolet radiation resistance, oil resistance, acid / alkali resistance and the other properties, is durable, is simple in raw materials, wide in source, low in cost, simple in preparation process and suitable for industrial popularization and production.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to a high-toughness wire and cable protective sleeve material and a preparation method thereof. Background technique [0002] Traditional wire and cable materials are mostly made of PVC and halogen-containing flame retardants, but halogen-containing flame-retardant materials will produce a large amount of toxic acid gas and high smoke density when burned, causing serious harm to human safety. In recent years, in order to solve these problems, people often use polyolefin as the matrix and inorganic metal hydroxide as the flame-retardant filling system to prepare low-smoke, halogen-free, flame-retardant wire and cable materials by blending methods, but the inorganic metal hydroxide The flame retardant efficiency is low, and the filling amount to achieve the expected flame retardant effect is very high. On the other hand, the surface compatibility between the i...

AI Technical Summary

Problems solved by technology

However, this patent uses red phosphorus and aluminum hydroxide as flame retardants. Due to the low decomposition temperature of aluminum hydroxide, red phosphorus is flammable, dust is easy to explode, and irritating gases will be released during combustion, which cannot meet the low requirements of wire and cable materials. Smoke non-toxic environmental protection and other requirements, so the application is limited

On the other hand, the patent adopts dynamic vulcanization directly in the internal mixer, which makes it difficult to ensure the uniformity of the particle size of the crosslinked particles during the vulcanization process, thus affecting the overall performance of the product

The publication number is CN102952353B, which discloses a preparation method of a 105°C environmentally friendly flame-retardant PVC cable sheath material for indoor flexible optical cables. Add PVC resin to a high-speed mixer, start low-speed stirring, and rotate at 400-600rpm, and then add plasticizer. Start high-speed stirring at a speed of 900-1100rpm. When the temperature of the material rises to 75-85°C, add an environmentally friendly heat-resistant stabilizer, acrylate copolymer, flame retardant, calcium carbonate, lubricant, and antioxidant, and continue stirring until the temperature rises to 75-85°C. 105-115°C, the material is in the form of dry powder, and the discharge valve is opened to discharge the material. The components in the sheath material and their contents in parts by weight are 100 of the PVC resin, 25-45 of the plasticizer, and The environmental protection heat-resistant stabilizer 5-10, the acrylate copolymer 2-8, the flame retardant 4-8, the calcium carbonate 10-30, the lubricant 0.3-1, the antioxidant Agent 0.1-0.5; the released material then enters the twin-screw extruder for extrusion and mixing, and then enters the single-screw extruder for granulation, adopts the mold surface eager cutting granulation process, and the produced particles enter the second through the fan conveying pipeline. The first-stage cyclone cooling separator, the second-stage cyclone cooling separator, the air-cooled vibrating screen, the third-stage cyclone cooling separator, and finally the finished material is obtained. The prepared sheath material has excellent flame retardancy and low product shrinkage. And has excellent surface hardness, but poor toughness, weather resistance, short service life