High-temperature resistant cable sheath insulation material and preparation method thereof

Abstract

The invention discloses a stretch-proof cable sheath insulation material and a preparation method thereof. The stretch-proof cable sheath insulation material comprises the following raw materials in parts by weight: 97-103 parts of neoprene CR121, 13-17 parts of SG-4 type PVC (Polyvinyl chloride) resin, 14-22 parts of semi-reinforcing carbon black N774, 2-3 parts of magnesium oxide, 1-2 parts of aluminic acid ester coupling agent, 30-33 parts of blanc fixe, 1-2 parts of antiager MB, 1-2 parts of 2-thiol group benzimidazole, 5-7 parts of polyamine wax micro powder, 1-2 parts of promoter DM1, 0.8-1 part of promoter TMTD, 14-18 parts of high wear resistance carbon black N330, 1.-1.2 parts of adipic acid propylene glycol polyester, 2-4 parts of zinc borate, 4-6 parts of glass powder, 0-8-1 part of zinc oxide, 2-3 parts of modified bentonite, 4-6 parts of ethylene thiourea, 2-3 parts of ammonium dihydrogen phosphate and 0.8-1 part of N-2-(amino ethyl group)-3-aminopropyl trimethoxy silane. The stretch-proof cable sheath insulation material prepared by the method has the advantages of excellent physical properties, stable size, low percentage of contraction and greatly increases tensile strength, tearing strength and resilience force performance and has the performances of common silicon rubber at the normal temperature and forms a hard shell after ablated in high-temperature fire to protect a burned objected from being damaged.

Description

technical field [0001] The invention mainly relates to a rubber sheath material and a preparation method thereof, in particular to a high temperature resistant cable sheath insulation material and a preparation method thereof. Background technique [0002] Fire-resistant (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 continues to provide power and transmit various signals normally for a long time when the fire is high temperature, thus Provide protection for fire control and life saving; 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 refractory cables are divided into two types: mica tape refractory cables and mineral insulated refractory cables. Both of these two types of fire-resistant cables can reach the Class A (test tempe...

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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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