Heat-resistant anti-UV flame-retardant sheath material and preparation method thereof

Abstract

The invention discloses a heat-resistant anti-UV flame-retardant sheath material and a preparation method thereof. The flame-retardant sheath material is prepared from matrix resin, an inorganic flame retardant, a flame retardant synergist, an anti-UV agent, a compatilizer, a lubricant and an antioxidant. The preparation method of the heat-resistant anti-UV flame-retardant sheath material is very simple, and comprises the steps of mixing the components evenly at first, and then transferring an obtained material into a two-screw / single-screw double-step milling granulator for extrusion and granulation. The flame-retardant sheath material can reach an excellent cross-linking effect after being subjected to 15-18-Mrad irradiation, resists UV, does not crack, resists long-term thermal ageing, generates little harmful and corrosive gas, and can meet the requirements of a 150-DEG C temperature-resistant grade in standard of halogen-free low-smoke flame-retardant materials used for YD / T 1113-2015 telecommunication cables and optical cables, and the change rate of the tensile performance after the heat-resistant anti-UV flame-retardant sheath material is subjected to thermal ageing is in a range of +30% to -30%.

Description

Technical field [0001] The invention belongs to the technical field of cable sheath materials, and specifically relates to a heat-resistant and UV-resistant flame-retardant sheath material and a preparation method thereof. Background technique [0002] With the continuous improvement of people's environmental protection and safety awareness, as well as the implementation of various material standards and systems, safe, environmentally friendly, and flame-retardant communication materials have become a major trend. The working environment of the optical cable is directly related to the base station chassis and the local climate. Especially in areas with harsh conditions, it will be affected by high and low temperatures, temperature differences between day and night, sunlight, and environmental corrosion. To maintain good communication stability and safety performance, optical cables are required to have excellent high and low temperature resistance, UV resistance and non-cracking ...

AI Technical Summary

Problems solved by technology

Most of the existing cable sheath materials have excellent flame retardancy and high and low temperature resistance, but their long-term thermal aging resistance and UV resistance are generally poor, and their performance will decrease significantly after being used in a high temperature environment for a period of time. There are security risks

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