Material for fireproof sealing of cable entry

Abstract

The invention belongs to the technical field of polymer materials, and in particular relates to a material for fireproof sealing of cable inlets. Its raw materials include: by weight, 100-120 parts of ethylene-vinyl acetate copolymer (EVA), 20-50 parts of maleic anhydride grafted polypropylene, 20-50 parts of tung oil, and 10-20 parts of graphene nanofibers , Azodicarbonamide (AC) 5-10 parts, flame retardant 10-20 parts, initiator 5-9 parts, stearic acid 8-12 parts, epoxy soybean octyl 8-12 parts. The material of the present invention has the characteristics of high closed cell rate, good temperature resistance, small compression deformation, excellent flame retardancy and antistatic performance, and is suitable for electric field packaging, especially for fireproof sealing of cable inlets in substations use.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a material for fireproof sealing of cable inlets. Background technique [0002] With the rapid development of my country's electric power in recent years, there are increasingly higher requirements for ensuring the safe operation of the power system and improving the economic benefits of the system, especially for the protection of various terminal boxes, control panels, power distribution cabinets and other devices. Once there is a fire hazard, the flames entering the box will cause damage to the components in the box, causing failures and even serious accidents. Therefore, the problem of fire protection in the power system deserves special attention. Common fireproof mud is usually used to block the incoming and outgoing cables of screens, power distribution cabinets and other devices, but this material will soften in summer or when exposed to heat, and wi...

AI Technical Summary

Problems solved by technology

Once there is a fire hazard, the flames entering the box will cause damage to the components in the box, causing failures and even serious accidents. Therefore, the problem of fire protection in the power system deserves special attention. Common fireproof mud is usually used to block the incoming and outgoing cables of screens, power distribution cabinets and other devices, but this material will soften in summer or when exposed to heat, and will shrink to form cracks when the temperature is low. For a long time, there are gaps between the cables, and it is difficult to do a good job of sealing, and the fireproof mud also has defects such as irregular shape, flow collapse, cracks, and non-compactness, which pose great hidden dangers

[0003] In response to the above problems, a new type of intumescent fireproof coating has appeared on the market. It is the same as ordinary coating film at room temperature. Under the action of flame or high temperature, the coating will expand to form a non-flammable porous carbon layer, which can slow down Or cut off the heating of the fire source to the base material, so as to achieve the effect of flame retardancy; but there are still problems such as not obvious fire prevention effect and short flame resistance time, especially in power system applications, there are still problems such as poor antistatic effect

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