A high-temperature-resistant, halogen-free, flame-retardant and environmentally friendly cable for smart energy EMUs and its production process

Abstract

The invention relates to a high-temperature-resistant, halogen-free, flame-retardant and environmentally friendly cable for smart energy EMUs and a production process. From the inside to the outside, there are conductors, low-smoke, halogen-free flame-retardant tapes, insulating layers, fiber braided reinforcement layers, and inner coating layers. , a sheath, a glass fiber braided layer and an outer coating layer; the insulating layer is a silicone rubber insulating layer; the sheath is a silicone rubber sheath; the inner coating layer and the outer coating layer are coated with aluminum sol Covering layer; the insulating layer is a silicone rubber insulating material mixed with phenolic resin hollow microspheres inside. Phenolic resin hollow microspheres are added to the cable insulation formula system of the present invention, which can effectively increase the insulation electrical performance and high temperature resistance performance, and reduce the weight of the cable itself; High temperature performance, and improve the strength, impact resistance and wear resistance of the finished cable, effectively solving the problems of low strength and poor flame retardancy of silicone rubber cables.

Description

technical field [0001] The invention relates to the technical field of locomotive cables, in particular to a high-temperature-resistant, halogen-free, flame-retardant, environmentally friendly cable for smart energy EMUs and a production process. Background technique [0002] The operation and laying environment of cables in EMU trains is complex, especially for high-speed EMUs with a speed of 350km / h. Due to the high power of the locomotives and the long time of high-speed operation, the local temperature rises sharply, up to 150°C. Therefore, the locomotive cables made of ordinary cross-linked polyolefin materials cannot meet the operating requirements, and silicone rubber materials are required, but the tensile strength and wear resistance of silicone rubber materials are relatively poor and easy to be damaged; at the same time, EMUs have very high requirements for environmental protection, requiring cables It has good halogen-free flame retardancy and high light transmis...

AI Technical Summary

Problems solved by technology

Therefore, the locomotive cables made of ordinary cross-linked polyolefin materials cannot meet the operating requirements, and silicone rubber materials are required, but the tensile strength and wear resistance of silicone rubber materials are relatively poor and easy to be damaged; at the same time, EMUs have very high requirements for environmental protection, requiring cables It has good halogen-free flame retardant and high light transmission performance, so in order to ensure both high temperature resistance and halogen-free flame retardant performance

[0003] The existing high-temperature-resistant cables generally improve the silicone rubber by adding a coupling agent to improve the tensile strength and wear resistance of the silicone rubber. However, since the EMU has been in a high-temperature environment for a long time, the quality requirements for the coupling agent are relatively high. In a high temperature environment, the stability of the coupling agent itself is poor, which affects the strength and flame retardancy of the cable, thereby affecting the service life of the cable

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