Production method of high-temperature-resistant low-shrinkage PVC cable material

Abstract

The invention belongs to the technical field of cable raw material preparation, and particularly relates to a production method of a high-temperature-resistant low-shrinkage PVC cable material. The production method comprises the steps of S1 cable material raw material preparation: the cable material raw materials comprising the following raw materials in parts by weight: 100 parts of PVC resin powder, 40 to 80 parts of a plasticizer, 10 parts of a talcum powder and kaolin mixture, 10 to 20 parts of nitrile rubber buna powder, 3 to 5 parts of a calcium-zinc heat stabilizer, 5 to 10 parts of epoxidized soybean oil, 50 to 80 parts of an aluminum hydroxide flame retardant, 1 to 4 parts of an antioxidant BHT, and 1 to 4 parts of a calcium stearate lubricant; S2 mixing the raw materials of the cable material, namely putting the raw materials in the S1 into a mixer for stirring and mixing, putting the mixed raw materials into a double-screw extruder, extruding into strips, putting the strips into a cold water tank for cooling and hardening, and then cutting the strips into granules by a granulator; and S3 air-drying the granular cable raw materials, then putting into a drying machine for drying treatment, and finally collecting and packaging into a finished product.

Description

technical field [0001] The invention belongs to the technical field of cable raw material preparation, in particular to a production method for high-temperature-resistant and low-shrinkage PVC cable materials. Background technique [0002] With the development of modern science and technology and the improvement of people's living standards, higher requirements have been put forward for the safety, environmental protection and service life of wire and cable products. In the late 1990s, the application technology of domestic polymer materials and synthetic resins and The rapid development of its blending modification technology has actively promoted the cable industry to enter an era of application of new materials. Low-smoke, halogen-free, flame-retardant material is a new type that has emerged in recent years. Its performance meets the requirements for thermoplastic materials in the IEC92-359 standard. The low-smoke, halogen-free, and flame-retardant cables produced have be...

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Problems solved by technology

[0003] During the preparation of cable raw materials, the strip-shaped raw materials extruded by the twin-screw extruder first enter the cold water tank to harden rapidly, then cut into granules, and then air-dry. Due to the granules, the granulated raw materials accumulate together during air-drying Not all the particles can be air-dried, resulting in residual moisture on the surface of some particles, and uneven particle end surfaces, and residual moisture. If the particles with moisture are directly packaged, the packaged product will be accompanied by moisture, which will increase the weight of the particles. At the same time, the moisture on the particles is difficult to dry. When the buyer loads the material, the energy consumption of melting the raw material will be increased, and there will be holes left in the product after the water is evaporated, which cannot be favored by the buyer. At the same time, the horizontal dryer, use When a larger area is required, the horizontal dryer is not suitable for production and processing for places with limited space

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