Low-friction, low-shrinkage, high-temperature-resistant, low-smoke and halogen-free sheath material for 5G optical cable and preparation method thereof

Abstract

The invention discloses a low-friction, low-shrinkage, high-temperature-resistant, low-smoke and halogen-free sheath material for 5G optical cables and a preparation method thereof. The sheath material comprises the following raw materials in parts by mass: 15-30 parts of micro-crosslinked EVA master batch, 20-45 parts of an ethylene-vinyl acetate copolymer, 5-15 parts of linear low density polyethylene, 5-15 parts of modified polyphenyl ether, 10-20 parts of a hydrogenated styrene-butadiene block copolymer, 5-15 parts of a maleic acid glycoside graft, 0-100 parts of magnesium hydroxide, 25-50parts of a phosphorus-hydrogen flame retardant, 2-4 parts of an antioxidant, 3-6 parts of a lubricant and 1-3 parts of a smoke suppressant. According to the invention, the raw material formula is improved, particularly, the excellent characteristics of high and low temperature resistance, low shrinkage, high mechanical property, low dielectric property, self flame retardance, low friction coefficient, wear resistance and the like of the modified polyphenyl ether are fully utilized, by combining with the micro-crosslinked EVA master batch, the defects of large shrinkage and no temperature resistance of common low-smoke halogen-free materials are overcome, so that the sheath material disclosed by the invention is low in friction coefficient, low in shrinkage, resistant to high and low temperature and simple in preparation method.

Description

technical field [0001] The invention belongs to the technical field of low-smoke, halogen-free, flame-retardant cable materials and preparation thereof, and specifically relates to a low-smoke, low-shrinkage, high-temperature-resistant, low-smoke, halogen-free sheathing material for 5G optical cables and a preparation method. Background technique [0002] The innovation of 5G in wireless technology and network technology has brought new development opportunities for the cable industry, especially in the field of optical fiber and cable. With the huge increase in the demand for optical communication transformation worldwide, the demand for optical fiber and cable will continue to rise. Market research institutions predict that the global optical fiber market will grow at a compound annual growth rate of 11.45% from 2017 to 2021. Compared with the traditional base station, the 5G base station integrates the antenna and radio frequency, and the volume is smaller, and the capaci...

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Problems solved by technology

[0003]Ordinary low-smoke halogen-free sheathing materials are mostly EVA / PE (ethylene-vinyl acetate copolymer / polyethylene) resin blended hydroxide flame retardant Mixture, its softening point is mostly between 70~90°C, its thermal deformation and deformation rate during high and low temperature cycles are far from meeting the requirements of 5G sheath materials

Furthermore, the dynamic friction of ordinary low-smoke halogen-free sheath materials is generally above 0.3, which cannot meet the requirements of 5G cables

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