Flame-retardant type cable sheath insulation material and preparation method thereof

Abstract

The invention discloses a flame-retardant type cable sheath insulation material and a preparation method thereof. The flame-retardant type cable sheath insulation material comprises the following raw materials in parts by weight: 94-102 parts of neoprene CR121, 16-21 parts of chlorinated polyethylene, 16-22 parts of semi-reinforcing carbon black N774, 2-4 parts of magnesium oxide, 1-2 parts of glass powder, 32-36 parts of mica powder, 1-2 parts of anti-aging agents MB, 1-2 parts of 2-thiol-group benzimidazole, 5-7 parts of polyamide wax micropowder, 1-2 parts of accelerants DM, 0.8-1 part of accelerants TMTD, 18-23 parts of kaolin, 1-3 parts of adipic acid propanediol polyester, 2-4 parts of zinc borate, 4-6 parts of talcum powder, 0.8-1 part of zinc oxide, 2-3 parts of modified calcium carbonate, 5-6 parts of antimony trioxide, 4-6 parts of ethylene thiourea, 4-6 parts of ethylene bis stearamide, 0.7-0.9 part of di-n-octyltin bis(isooctyl thioglycollate) and 0.5-0.8 part of bis(P,P-bis-ethylhexyl diphosphato) ethanediolato titanate. The flame-retardant type cable sheath insulation material disclosed by the invention has characteristics superior to those of common rubber and flame-retardant rubber, namely, the flame-retardant type cable sheath insulation material disclosed by the invention has the property of common silicon rubber at normal temperature, and a rigid shell after is formed being ablated by high temperature flames so as to protect the burnt object not to be damaged.

Description

technical field [0001] The invention mainly relates to a rubber sheath material and a preparation method thereof, in particular to a flame-retardant cable sheath insulating material and a preparation method thereof. Background technique [0002] Fireproof (fire-resistant) cable refers to a type of cable that can ensure the integrity of the line in the event of a fire; this kind of cable can ensure that the cable can continue to provide power and transmit various signals normally for a long period of time when the fire is at high temperature, so that Provide protection for fire control and lifesaving; especially for theaters, subways, airports, nuclear power plants and other crowded public places or important places. According to the different refractory materials used, the existing fire-resistant cables are divided into mica tape fire-resistant cables and mineral insulated fire-resistant cables. These two types of fire-resistant cables can both meet Class A (test temperatur...

AI Technical Summary

Problems solved by technology

These two types of fire-resistant cables can meet the fire-resistant standard of Class A (test temperature is 950 ° C ~ 1000 ° C), ensuring the integrity of the line in case of fire, but these two types of cables have high quality, slow production speed and high cost

The common method of silicone rubber flame retardant is to add flame retardant to the polymer to reduce the surface temperature of the burning material, dilute the molecular concentration of the combustible material, cut off the supply of oxygen, and form a barrier layer on the burning surface of the silicone rubber to prevent heat energy from flowing to the silicone rubber. The purpose of flame retardancy can be achieved by suppressing the temperature rise; however, cables made of flame-retardant rubber can only delay the time when the rubber is burned into powder. If the fire continues, the rubber will gradually become powdery and fall off, losing In order to protect the function, the wire and cable will be broken down and cause a short circuit

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