Cold-resistant ultraviolet-resistant low-smoke halogen-free flame-retardant cable sheath and preparation method thereof

Abstract

The invention relates to a cold-resistant ultraviolet-resistant low-smoke halogen-free flame-retardant cable sheath and a preparation method thereof. The cable sheath is composed of the following components in parts by weight: 40-100 parts of silane crosslinked polyethylene, 12-30 parts of inorganic flame retardant, 15-30 parts of granular carbon black, 0.5-1.5 parts of light stabilizer, 0.5-1.5 parts of antioxidant, 0.5-3 parts of titanate coupling agent, 1-5 parts of EVA (ethylene-vinyl acetate) resin and 10-15 parts of talcum powder. The cable sheath has the advantages of superhigh ultralow temperature resistance, superhigh ultraviolet resistance, favorable flame retardancy, high tensile strength, high elongation at break, excellent aging temperature and indexes, excellent volume resistivity, excellent oil resistance, excellent scratch and wear resistance and excellent flexibility, and fills the blank in the current domestic market of cable sheath materials.

Description

technical field [0001] The invention relates to an optical cable sheath, in particular to a cold-resistant, purple-smoke, low-smoke, halogen-free, flame-retardant optical cable sheath and a preparation method thereof. Background technique [0002] With the rapid development of my country's metallurgy, communication, electronics, automation and information network industries, the amount of supporting optical cables, especially cold-resistant halogen-free flame-retardant optical cables, has increased sharply. The previous ordinary optical cables were composed of polyethylene, polyvinyl chloride Or polyolefin blend resin plus flame retardant filling technology, the optical cable produced is far from meeting the special environmental needs of today, hindering the development of the communication industry in cold regions. [0003] Nowadays, the cold resistance of existing cable sheath materials can only reach the level of cold resistance level 4 (-40°C), and the physical performan...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-smoke, cold-resistant, low-smoke, halogen-free, flame-retardant optical cable sheath and its preparation method, which solves the problems of cold resistance, ultraviolet resistance, flame retardancy, tensile fracture resistance, and aging resistance of optical cable sheaths in the prior art. , poor performance such as oil resistance