Flame-retardant sheath of optical cable and preparation method thereof

Abstract

The invention discloses a flame-retardant sheath of an optical cable and a preparation method thereof. The flame-retardant sheath is specifically prepared from the following raw materials in parts byweight through processing: 50 to 60 parts of a base material, 0.5 to 1.5 parts of a stabilizing agent, 30 to 45 parts of a flame retardant, 1 to 4 parts of an activating agent, 0.8 to 1.3 parts of a coupling agent, 1 to 3 parts of a lubricating agent, 2 to 2.5 parts of an antioxidant and 1 to 1.5 parts of an anti-ultraviolet assistant. According to the flame-retardant sheath disclosed by the invention, a mixture of a polyethylene elastomer POE (Polyolefin Elastomer)8203 and ethylene-vinyl acetate copolymer is used as the base material, so that the flame-retardant sheath has good bending performance and oil resistance; meanwhile, a nano zinc oxide dispersion solution is adopted as the anti-ultraviolet assistant, so that the situation that a sheath finished product is easy to crack and cannot resist ultraviolet rays as various inorganic materials are added can be reduced or even eliminated.

Description

technical field [0001] The invention belongs to the technical field of optical communication equipment, and in particular relates to a flame-retardant sheath for an optical cable and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection and safety, people have higher requirements for materials and hourly labor in all walks of life. Optical cables are the main carrier of network communication today, and the scope and density of optical cable laying far exceed ours. Imagine that as the outer protective layer of the optical cable, the optical cable sheath not only requires good physical and mechanical properties, but also good flame retardancy. The flame-retardant sheath can suppress the occurrence of fire in time and reduce the direct damage caused by fire. Loss and loss of communication operations of optical cables, reducing the speed of fire spread. [0003] In the prior art, the flame-retardant ma...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the flame-retardant materials used as optical cable sheaths are mainly low-smoke, halogen-free flame-retardant materials. This type of material has a good flame-retardant effect, but at the same time, this type of material is filled with inorganic materials, and these inorganic materials It melts at a certain temperature and its decomposition temperature will be higher than the extrusion temperature of the production sheath, resulting in unstable extrusion, which affects the mechanical strength and performance of the extruded sheath, and this type of flame retardant material is not at the same time It has qualified oil resistance and ultraviolet resistance, which reduces the effective use time of the sheath, and at the same time, its hardness is relatively high, and it does not have good bending performance. In order to solve this problem, the present invention provides the following technical solutions