Class-A halogen-free low-smoke flame-retardant control cable

Abstract

The invention discloses a class-A halogen-free low-smoke flame-retardant control cable which comprises a cable core, an insulating layer and a sheath layer are sequentially arranged in the outer side of the cable core, a wrapping flame-retardant layer is arranged between the insulating layer and the sheath layer, and the wrapping flame-retardant layer comprises a first flame-retardant layer, a second flame-retardant layer and a third flame-retardant layer which are sequentially arranged from the insulating layer to the sheath layer; the first flame-retardant layer comprises three layers of halogen-free low-smoke flame-retardant non-woven fabric belts; the second flame-retardant layer comprises a layer of polypropylene tape; the third flame-retardant layer comprises two layers of low-smoke halogen-free high-flame-retardant glass fiber oxygen isolation belts; and the two sides of the halogen-free low-smoke flame-retardant non-woven fabric belt, the two sides of the polypropylene belt and the two sides of the low-smoke halogen-free high-flame-retardant glass fiber oxygen isolation belt are all coated with flame-retardant inorganic matter. According to the class-A halogen-free low-smoke flame-retardant control cable adopting the structure, the wrapping insulating layer is additionally arranged between the insulating layer and the sheath layer to form the A-type halogen-free low-smoke flame-retardant control cable, the fire supply time can reach 40 minutes, and the national standard is met.

Description

technical field [0001] The invention relates to a flame-retardant cable technology, in particular to a Class A halogen-free low-smoke flame-retardant control cable. Background technique [0002] With the increasing awareness of people's safety and environmental protection, halogen-free low-smoke flame-retardant control cables are widely used in high-rise buildings, large shopping malls, schools, hospitals, underground parking lots and other occasions with high fire protection requirements. Nearly 20 years of production and manufacturing history, but because there was no national and industry standards for a time, the product name, model, technical requirements and test methods are quite confusing. To this end, the national standard GB / T19666-2019 "General Rules for Flame-Retardant and Fire-Resistant Wires and Cables or Optical Cables" was released in 2019, which clearly stipulates that flame-retardant and fire-resistant wires and cables include halogen-free, halogen-free, an...

AI Technical Summary

Problems solved by technology

According to the flame retardant characteristics, the halogen-free low-smoke flame-retardant cables are divided into five grades: single flame-retardant Z, bunched flame-retardant ZA, bunched flame-retardant ZB, bunched flame-retardant ZC and bunched flame-retardant ZD, bunched flame-retardant ZD, bunched Flame-retardant ZA has the most stringent requirements, and it is the most difficult to meet its specified technical indicators. In fact, the quality of halogen-free low-smoke flame-retardant control cables in the market is still uneven, with various structures and many hidden dangers.

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