Novel halogen-free cable and production process thereof

Abstract

The invention discloses a novel halogen-free cable. According to the structure, an innermost layer is a copper conductor; a silicone rubber layer is arranged outside the copper conductor; a pluralityof reinforced silicone rubber ropes are uniformly distributed in the silicone rubber layer; the silicon rubber layer is externally provided with a mica tape layer, the mica tape layer is externally provided with an aluminum foil layer, the aluminum foil layer is externally provided with a ceramic fiber cloth layer, the ceramic fiber cloth layer is externally provided with a polyurethane sheath layer, the polyurethane sheath layer is externally provided with a nylon cloth layer, and the nylon cloth layer is externally provided with a steel tape armor layer. According to the invention, the halogen-free cable with excellent tensile property, low processing difficulty and moderate cost can be prepared.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a novel halogen-free cable and a production process thereof. Background technique [0002] The main material of the insulation layer of traditional cables is halogen-containing materials, such as polyvinyl chloride, and contains halogen-based flame retardants. When the material is burned, it generates a large amount of smoke and produces a large amount of corrosive and toxic gases (such as chlorine, HBr, etc.), which has an adverse effect on fire extinguishing and personnel escape, making fire rescue more difficult. The corrosive gas released at the same time causes the electrical appliances at the fire scene to be corroded and destroyed. In addition, halogen-based flame retardants will accumulate toxicity and produce carcinogens during production, transportation, storage, and recycling of waste products, so halogen-free cables have emerged as the times require. [0...

AI Technical Summary

Problems solved by technology

When the material is burned, it generates a large amount of smoke and produces a large amount of corrosive and toxic gases (such as chlorine, HBr, etc.), which has an adverse effect on fire extinguishing and personnel escape, making fire rescue more difficult.

The corrosive gas released at the same time causes the electrical appliances at the fire site to be corroded and destroyed

In addition, halogen-based flame retardants will accumulate toxicity and produce carcinogens in the process of production, transportation, storage, and recycling of waste products, so halogen-free cables came into being

[0003] However, most halogen-free materials have low tensile properties. Generally, there are two methods to enhance tensile properties: 1. Use materials with better properties, such as radiation cross-linked polyolefins. Due to the complicated process, these materials are often sold at a high price. Expensive; 2. Add reinforcement structure in the insulation layer, such as adding high-strength fibers (glass fiber, ceramic fiber, etc.), because the properties of the reinforcement fiber and the insulation layer itself are quite different, under thermal expansion and contraction, material aging and other reasons , the strengthening layer and the insulating layer will not be tightly combined, resulting in a decrease in tensile properties

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