Flame retardant and fire resistant cable material

Abstract

The invention discloses a flame retardant and fire resistant cable material. The material is composed of the following raw materials in parts by weight: 40-50 parts of EPDM (Ethylene Propylene Diene Monomer) resin, 70-90 parts of aluminum hydroxide, 6-8 parts of red phosphorus, 40-50 parts of glass fiber, 4-10 parts of ceramic zinc borate, 6-8 parts of coupling agents and 4-8 parts of blowing promoters. The flame retardant and fire resistant cable material is good in flexibility and elasticity and excellent in moisture resistance and water absorption resistance; a burned ceramic substance is of a rigid and uniformly cellular shell; continuous glass ceramic layer films are formed by using ceramic zinc borate at a high temperature; and the glass ceramic layer films have an excellent insulation property, an excellent heat insulation property and an excellent fire insulation and resistance property , and meanwhile can withstand shock and vibration and prevent water from permeating.

Description

Technical field [0001] The invention relates to the technical field of cable production, in particular to a flame-retardant and fire-resistant cable material. Background technique [0002] Existing domestic and foreign fire-resistant cables mainly include magnesium oxide mineral insulated fire-resistant cables and mica tape-wrapped inorganic insulated fire-resistant cables. Although mineral insulated fireproof cables have good fire resistance, they have complex manufacturing processes, high production costs, and limited manufacturing lengths. Moreover, the cables are very hard and cannot be bent, the joints are complex, and the construction is difficult, making it difficult to be widely used. Although the mica tape-wrapped fire-resistant cable has simple process and unlimited manufacturing length, there is a common shortcoming of mica tape. After high-temperature combustion, the mechanical strength of mica tape is greatly reduced, becomes brittle, and is easy to powder and fall o...

AI Technical Summary

Problems solved by technology

Although mineral insulated fireproof cables have good fire resistance, their manufacturing process is complicated, the production cost is high, the length of production is limited, and the cables are very hard and cannot be bent, the joints are complicated, the construction is very difficult, and it is difficult to be widely used

Although the mica tape wrapping refractory cable has a simple process and unlimited manufacturing length, there is a common disadvantage of the mica tape. After high temperature combustion, the mechanical strength of the mica tape is greatly reduced and becomes brittle. It is easy to pulverize and fall off after being subjected to severe vibration, causing Poor refractory effect

Moreover, because the mica tape is easy to drop powder when it is rubbed, a large amount of dust at the wrapping site will pose a threat to the health of the workers.

In recent years, researchers have explored and researched ceramic silicone rubber insulated fire-resistant cables, but because the cable manufacturing process requires special mixing, extrusion and vulcanization equipment, the process is complicated, and it is difficult to strike a balance between the strength of the insulating layer and the fire-resistant performance. , the degree of ceramicization is difficult to pass the water and fire resistance test of fire-resistant cables

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