TPE insulating material

Abstract

The invention discloses a TPE insulating material. The TPE insulating material comprises the following components in parts by weight: 12 to 40 parts of polypropylene, 8 to 20 parts of polyurethane, 20to 100 parts of SEBS, 4 to 12 parts of calcium carbonate, 50 to 90 parts of white oil, 0.2 to 2 parts of an antioxidant, 0.4 to 6 parts of a compatibilizer and 0.1 to 0.5 part of fatty acid amide. The material provided by the invention has the following advantages: the extrusion fluidity of a TPE material is improved, so the material is smoothly demolded; the molding time of the material is shortened by 10%, so the efficiency of production is greatly improved; a filling material and a colorant can be uniformly and continuously dispersed in masterbatches, so color difference is avoided from occurring; dispersion uniformity of the components in the TPE material is improved, so the material is easily plasticized; the temperature of processing can be reduced by 20 to 30 DEG C, so the defect of foam is avoided from occurring; and after the material is used, the abrasion coefficient of the TPE material can be reduced, and the service life of processing equipment (a roller and the like) canbe prolonged.

Description

technical field [0001] The invention relates to a TPE insulating material, which is used for cable insulating layers and sheath layers. Background technique [0002] TPE material is a composite material obtained by modifying SEBS as the base material. It has unique elasticity and touch. However, TPE material itself is not easy to process, the material has poor fluidity, and the components will be filled with oil, adding various plasticizers. And inorganic fillers, so the products produced will have problems such as oil emission, plasticizer precipitation, and white appearance of cables when they are used. Moreover, the material has high requirements on the process. Although special equipment and screws are used, various quality defects will still occur during production and use, especially when extruding thin-walled insulating structures. Due to the thin thickness of the material and the high viscosity of the material, The fluidity is poor, and the insulation is easy to fal...

AI Technical Summary

Problems solved by technology

[0002] TPE material is a composite material obtained by modifying SEBS as the base material. It has unique elasticity and touch. However, TPE material itself is not easy to process, the material has poor fluidity, and the components will be filled with oil, adding various plasticizers. and inorganic fillers, so the products produced will have problems such as oil emission, plasticizer precipitation, and whitening of the cable appearance during use.

Moreover, the material has high requirements on the process. Although special equipment and screws are used, various quality defects will still occur during production and use, especially when extruding thin-walled insulating structures. Due to the thin thickness of the material and the high viscosity of the material, The fluidity is poor, and the insulation is easy to fall off, so it is necessary to preheat the conductor and increase the extrusion temperature to improve the fluidity and ductility of the material

However, the extrusion fluidity of the material is improved, and bubble defects will appear in the insulation, and the color distribution is uneven, and there will be obvious color difference.

[0003] For example, in order to improve the defects of TPE materials, material manufacturers will adjust the ratio of additives such as oil and plasticizer in the raw material formula, but this will reduce the performance indicators of TPE materials, and there will be problems such as whitening and oil leakage during the use of cables

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