High-performance flame-retardant cable material and preparation method thereof

Abstract

The invention discloses a high-performance flame-retardant cable material. The high-performance flame-retardant cable material comprises the following raw materials: 200 parts of EVA, 2 to 4 parts of modified hydrotalcite, 2 to 9 parts of an antioxidant, 2 to 10 parts of a promoter, 0.8 to 1.8 parts of a plasticizer and 6 to 12 parts of a nanometer activator. The invention further discloses a preparation method for the flame-retardant cable material. Through usage of nanometer synergistic modification flame-retardation EVA, the cable material has good mechanical properties, flame retardation and heat resistance.

Description

[0001] technical field [0002] The invention relates to the technical field of cable materials, in particular to a high-performance cable retardant and a preparation method thereof. Background technique [0003] With the continuous development of computer and network engineering, out of consideration for the safety of the computer room, people are increasingly using halogen-free flame-retardant cables and silane cross-linked cables. Because EVA resin has good filler tolerance and crosslinkability, it is widely used in halogen-free flame-retardant cables, semiconductor shielded cables and two-step silane crosslinked cables. In addition, EVA resin is also used to make sheaths for some special cables. The EVA resin used in wire and cable generally has a vinyl acetate content of 12% to 24%. [0004] The classification of flame retardants can be divided into halogen series, organophosphorus series, halogen phosphorus series, silicon series, aluminum magnesium series, molybde...

AI Technical Summary

Problems solved by technology

[0009] Although there are many reports on the synthesis of intumescent flame retardants, most of them are still in the laboratory research stage and have not realized industrial production. The main reasons are as follows: (1) Intumescent flame retardants have strong hygroscopicity.

For example, the intumescent flame retardant with APP / MEL / PER as the main component is more prone to alcoholysis between the various components, which makes the water resistance of the flame retardant matrix decrease.

(2) The intumescent flame retardant has poor compatibility with the matrix, which reduces the insulation and electrical properties of the matrix, especially the mechanical properties such as impact strength and tensile strength.

(3) The relative molecular weight of the intumescent flame retardant is relatively small, and it is easier to migrate to the surface of the polymer, which will also reduce the thermal stability of the material, and eventually lead to a decrease in the physical and mechanical properties and appearance of the matrix.

(4) The theoretical ratio between the intumescent flame retardant and the matrix is ​​still unclear

(5) The addition amount of intumescent flame retardant still needs to be relatively large

[0015] In the prior art, the halogen-containing flame retardant system also has a good flame retardant effect on EVA, and the combination of decabromodiphenyl ether and antimony trioxide can obtain a good flame retardant effect, but because the brominated flame retardant will produce Due to the disadvantages of toxic gas and dense smoke, it is not widely used in flame retardant materials for wires and cables.

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