Low-smoke halogen-free and flame-retardant polyolefin cable material with high cracking resistance

Abstract

The invention discloses a low-smoke halogen-free and flame-retardant polyolefin cable material with high cracking resistance. The invention belongs to the technical field of cable materials, and solves the problem that when a cable wire is subjected to coiling, the cable material possibly cracks at a bent position. The cable material is prepared by the following method of: firstly, mixing 65-75 parts by weight of an ethylene-vinyl acetate copolymer, 25-35 parts of high density polyethylene, 10-18 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 0.05-0.25 part of melamine urate,5-11 parts of red phosphorus, 10-20 parts of a hyperdispersant, 2-5 parts of an antioxidant, 15-21 parts of silicon dioxide, 9-15 parts of silicon resin, 5-11 parts of zinc hydroxystannate, 1.25-1.75parts of sorbitol, and 0.5-1.5 parts of sodium alginate evenly, conducting internal mixing at 130-140DEG C for 10-15min, and carrying out extrusion granulation at 115-140DEG C, thereby achieving theeffects of enabling the cable material to have favorable smoke suppression and flame retardancy and high mechanical properties.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a highly crack-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material. Background technique [0002] Cable material refers to the plastic used for wire and cable insulation and sheathing. As people become more and more aware of fire prevention, people pay more and more attention to the flame retardant performance of cable materials. However, adding halogen-containing plastics to cable materials Flame retardants, when a fire occurs, will produce toxic fumes, causing greater casualties, so now low-smoke, halogen-free, flame-retardant cable materials are more and more widely used. [0003] In order to make the cable material have low-smoke, halogen-free flame-retardant properties, it is necessary to fill it with more flame retardants. More flame retardants tend to be unevenly distributed in the cable material, which reduces the mechanical properties of the cable...

AI Technical Summary

Problems solved by technology

[0002] Cable material refers to the plastic used for wire and cable insulation and sheathing. As people become more and more aware of fire prevention, people pay more and more attention to the flame retardant performance of cable materials. However, adding halogen-containing plastics to cable materials Flame retardants, when there is a fire, will produce toxic smoke, causing greater casualties, so now low-smoke halogen-free flame-retardant cable materials are more and more widely used

[0003] In order to make the cable material have low-smoke, halogen-free flame-retardant properties, it is necessary to fill it with more flame retardants. More flame retardants tend to be unevenly distributed in the cable material, which reduces the mechanical properties of the cable material. When the cable When the cable is coiled, the cable material may crack at the bending position, which cannot protect the cable, and there is still room for improvement in the smoke suppression and flame retardant performance of the existing cable material