Production method of high-inflaming-retarding low-smoke halogen-free cable material

Abstract

The invention provides a production method of a high-inflaming-retarding low-smoke halogen-free cable material, belongs to the technical field of cable production, and particularly belongs to the technical field of low-smoke halogen-free cable material production. The production method comprises the steps of uniformly mixing linear low-density polyethylene powder with a silane coupling agent to form a modifying agent; agitating the modifying agent, ore-method magnesium hydroxide, chemical synthesis method magnesium hydroxide, montmorillonoid and zinc borate in a mixer for 10-25 minutes and activating the surfaces of the magnesium hydroxide, the montmorillonoid and the zinc borate; adding an ethylene-vinyl acetate copolymer, linear low density polyethylene, an ethylene-octylene copolymer, a compatilizer, an antioxidant and a lubricating agent into the obtained mixture; and granulating with a double-screw-rod extruder. The production method disclosed by the invention is simple in process and is convenient to produce; the oxygen index of the produced cable material is high and is more than 40; the fireproof property is excellent; and a vertical combustion grade experiment reaches the highest grade, FV-0 grade, and the smoke density is lower than that of the other like products.

Description

technical field [0001] The invention belongs to the technical field of cable production, in particular to the technical field of low-smoke and halogen-free cable material production. Background technique [0002] With the continuous progress of social industrialization, the electric power industry has become an important pillar of the rapid development of the national economy. The use of wires and cables is increasing year by year, and the fires caused by wires and cables are also increasing. The "China Fire Protection Yearbook" compiled by the Fire Department of the Ministry of Public Security shows that in 2008, there were 137,000 fires in the country, of which more than 40,000 were caused by electrical causes, accounting for 29.7%; in 2009, there were 129,000 fires in the country , of which more than 39,000 were electrical fires, accounting for 30.2%; in 2010, there were 132,000 fires nationwide, of which more than 41,000 were electrical fires, accounting for 31.1%. Acc...

AI Technical Summary

Problems solved by technology

[0003] In the Chinese patent literature with the application number 200710063717.0, a halogen-free flame-retardant cable sheathing material is disclosed, which uses ethylene-octene as the main matrix resin, ethylene-vinyl acetate and low-density polyethylene as the auxiliary matrix resin, and micron hydroxide Magnesium is used as a flame retardant, the oxygen index is only 28-30, and the standard of the Ministry of Machinery Industry for low-smoke halogen-free cable materials is that the oxygen index of insulating materials is ≥ 30, and the oxygen index of sheath materials is ≥ 32. The protection in this patent application technology The nesting material oxygen index is far from reaching the national standard, and the technical examples are all laboratory processing methods, and mature industrial production steps are not given

Images