Halogen-free flame-retardant cloth wire

Abstract

The application relates to the technical field of cloth electric wires, and discloses a halogen-free flame-retardant cloth electric wire which comprises a conductor and an insulating layer arranged in sequence from inside to outside, and the insulating layer comprises the following components by weight: ethylene-vinyl acetate copolymer 60-70 parts, low-density polyethylene 20-30 parts, a flame retardant 30-40 parts, and an additive 3-8 parts; the flame retardant comprises the following components by weight: aluminum hydroxide 100 parts, zinc borate 3-5 parts, aluminum diethyl phosphinate 15-20 parts, diethylphosphonoethyltriethoxysilane 5-6 parts, and phosphate ester type titanate coupling agent 2-3 parts. Through the technical scheme, the problem of insufficient flame-retardant performance of the cloth electric wire in the related art is solved.

Description

Technical Field

[0001] This invention relates to the field of electrical wiring technology, specifically to a halogen-free flame-retardant electrical wiring. Background Technology

[0002] Electrical wiring has a wide range of applications, covering civil, industrial, and public facilities. However, while electrical wiring can currently meet basic power transmission needs, it generally has low flame retardant properties. Although some halogen-containing flame-retardant electrical wiring can achieve a certain flame-retardant effect, it poses serious safety hazards, endangering personal and property safety.

[0003] Electrical wires with insufficient flame retardancy pose a higher risk of fire. During long-term use, when the electrical wires are ignited due to overload, short circuit, or other reasons, the flames on the insulation layer of the wires with insufficient flame retardancy will spread rapidly, accelerating the combustion process. During combustion, a large amount of dense smoke and toxic gases will be released, which will not only damage the respiratory tract but also cause certain economic losses.

[0004] Therefore, it is very necessary to develop a halogen-free flame-retardant electrical wire. Summary of the Invention

[0005] This invention proposes a halogen-free flame-retardant electrical wire, which solves the problem of insufficient flame-retardant performance of electrical wires in related technologies.

[0006] The technical solution of the present invention is as follows: This invention proposes a halogen-free flame-retardant electrical wire, comprising a conductor and an insulation layer arranged sequentially from the inside out. The insulation layer comprises the following raw materials in parts by weight: 60-70 parts of ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 30-40 parts of flame retardant, and 3-8 parts of additives. The flame retardant comprises the following raw materials in parts by weight: 100 parts of aluminum hydroxide, 3-5 parts of zinc borate, 15-20 parts of aluminum diethylphosphinate, 5-6 parts of diethylphosphonoethyltriethoxysilane, and 2-3 parts of phosphate ester titanate coupling agent.

[0007] Preferably, the conductor is made of either copper or an aluminum alloy.

[0008] Preferably, the phosphate ester type titanate coupling agent includes one or two of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris(dioctylphosphoyloxy) titanate.

[0009] Preferably, when the phosphate ester type titanate coupling agent is composed of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris (dioctylphosphoyloxy) titanate, the mass ratio of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate to isopropoxytris (dioctylphosphoyloxy) titanate is 1:2~3.

[0010] Preferably, the preparation method of the flame retardant includes the following steps: dispersing diethylphosphonoethyltriethoxysilane and phosphate ester titanate coupling agent in a solvent, adding aluminum hydroxide, mixing and drying to obtain composite aluminum hydroxide, and mixing the composite aluminum hydroxide, zinc borate and aluminum diethylphosphonate to obtain the flame retardant.

[0011] Preferably, the VA content of the ethylene-vinyl acetate copolymer is 28wt%~33wt%.

[0012] Preferably, the melt index of the low-density polyethylene is 1.6~2 g / 10 min.

[0013] Preferably, the additive consists of an antioxidant and a lubricant in a mass ratio of 1~1.5:2~4.

[0014] Preferably, the antioxidant includes one or both of antioxidant 1010 and antioxidant 168.

[0015] Preferably, the lubricant includes one or both of zinc stearate and calcium stearate.

[0016] The working principle and beneficial effects of this invention are as follows: In this invention, the flame retardant in the halogen-free flame-retardant electrical wire is mainly composed of aluminum hydroxide in the insulation layer. Under high temperature conditions, it undergoes an endothermic decomposition reaction, releasing water of crystallization and absorbing a large amount of heat, effectively reducing the surface temperature of the electrical wire and inhibiting the continued combustion reaction. At the same time, the aluminum oxide and water vapor produced by the decomposition can form a dense heat-insulating and oxygen-barrier protective layer on the surface of the electrical wire, preventing the flame from spreading further. Zinc borate, as a flame retardant synergist, can improve the flame retardant efficiency. The borate glassy substance produced by its decomposition can cover the burning surface, further blocking the contact between oxygen and combustibles, while inhibiting the generation of toxic and harmful fumes during combustion. Aluminum diethylphosphonate, as a highly efficient halogen-free flame retardant, has both gas-phase and condensed-phase flame retardant effects. It can release phosphine free radicals during combustion, capturing active free radicals in the combustion reaction, interrupting the combustion chain reaction, and promoting the formation of a char layer on the surface of the electrical wire, improving the density and stability of the char layer, and effectively preventing heat conduction and flame spread. Diethylphosphoryl ethyltriethoxysilane and phosphate ester titanate coupling agent promote uniform dispersion of flame retardant while increasing the bonding strength between flame retardant and matrix material. The substances work synergistically to improve the flame retardant performance of electrical wires. Detailed Implementation

[0017] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will be described through embodiments.

[0019] A specific embodiment of the first aspect of the present invention provides a halogen-free flame-retardant electrical wire, comprising a conductor and an insulation layer arranged sequentially from the inside out. The insulation layer comprises the following raw materials in parts by weight: 60-70 parts of ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 30-40 parts of flame retardant, and 3-8 parts of additives. The flame retardant comprises the following raw materials in parts by weight: 100 parts of aluminum hydroxide, 3-5 parts of zinc borate, 15-20 parts of aluminum diethylphosphinate, 5-6 parts of diethylphosphonoethyltriethoxysilane, and 2-3 parts of phosphate ester titanate coupling agent.

[0020] In one embodiment of the present invention, the conductor is made of either copper or an aluminum alloy, preferably copper.

[0021] In one embodiment of the present invention, the phosphate ester type titanate coupling agent includes one or both of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris(dioctylphosphoyloxy) titanate.

[0022] In one embodiment of the present invention, when the phosphate ester type titanate coupling agent is composed of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris (dioctylphosphoyloxy) titanate, the mass ratio of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate to isopropoxytris (dioctylphosphoyloxy) titanate is 1:2~3.

[0023] In this invention, the mass ratio of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate to isopropoxytris(dioctylphosphoyloxy) titanate is 1:2 to 3, for example, any ratio or range between any two ratios from 1:2, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, 1:2.6, 1:2.7, 1:2.8, 1:2.9, to 1:3. The isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate molecule contains an oleic acid acyl group, possessing excellent oleophilicity, which allows for better compatibility with the ethylene-vinyl acetate copolymer and low-density polyethylene organic substrate in the insulation layer. This effectively improves the uniformity of flame retardant dispersion in the substrate and avoids the problem of uneven flame retardant performance caused by flame retardant agglomeration. The isopropoxytris(dioctylphosphoyloxy)titanate molecule contains three dioctylphosphoyloxy groups, resulting in a higher content of phosphate ester groups. It can synergistically enhance the flame retardant properties of electrical wires with aluminum hydroxide, aluminum diethylphosphonate, and other materials.

[0024] In one embodiment of the present invention, the method for preparing the flame retardant includes the following steps: dispersing diethylphosphonoethyltriethoxysilane and phosphate ester titanate coupling agent in a solvent, adding aluminum hydroxide, mixing and drying to obtain composite aluminum hydroxide, and mixing composite aluminum hydroxide, zinc borate and aluminum diethylphosphonate to obtain the flame retardant.

[0025] In this invention, the solvent is composed of ethanol and water in a mass ratio of 10:1, and the mass ratio of the solvent to aluminum hydroxide is 3 to 8:1, for example, any ratio or range between any two ratios of 3:1, 4:1, 5:1, 6:1, 7:1, and 8:1, preferably 5:1. The mixing time is 2 to 5 hours, for example, any value or range between any two values ​​of 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, and 5 hours, preferably 3 hours.

[0026] In one embodiment of the present invention, the VA content of the ethylene-vinyl acetate copolymer is 28wt%~33wt%.

[0027] In this invention, the VA content of the ethylene-vinyl acetate copolymer is limited to 28wt%~33wt%, and the ratio of polar groups to non-polar groups in the molecular structure is moderate. On the one hand, it can form a good blending system with low-density polyethylene, and the two have excellent compatibility, which can avoid problems such as layering and phase separation during the blending process. It provides a uniform and stable dispersion carrier for the flame retardant, ensuring that the flame retardant can be uniformly dispersed in the insulation layer, giving full play to the synergistic flame retardant effect of each flame retardant component, and avoiding the agglomeration of the flame retardant due to poor compatibility of the substrate, which could lead to local flame retardant failure. On the other hand, this VA content range can make the ethylene-vinyl acetate copolymer maintain good flexibility and processing fluidity, making it easy to mold during the preparation of the insulation layer.

[0028] In one embodiment of the present invention, the melt index of low-density polyethylene is 1.6~2 g / 10 min.

[0029] In this invention, the melt index of low-density polyethylene is 1.6~2 g / 10min, which can achieve good compatibility and processing synergy with ethylene-vinyl acetate copolymer with VA content of 28wt%~33wt%, avoiding problems such as delamination, phase separation or insufficient fusion. In addition, the low-density polyethylene in this melt index range has the best compatibility with ethylene-vinyl acetate copolymer in terms of crystallinity and mechanical properties, which can synergistically improve the overall mechanical properties of the insulation layer, so that the insulation layer has both good flexibility and structural strength.

[0030] In this invention, the ethylene-vinyl acetate copolymer with a VA content of 28wt%~33wt% has a moderate ratio of polar to non-polar groups in its molecule, which not only has good flexibility and compatibility, but also provides a certain structural strength. The flexible characteristics of its molecular chain can avoid the problem of embrittlement and breakage of the insulation layer. The low-density polyethylene with a melt index of 1.6~2g / 10min has a uniform molecular weight distribution and suitable crystallinity. It has excellent tensile properties and its processing flow is highly compatible with the ethylene-vinyl acetate copolymer. When the two are blended, they can form a tight bond. The two work together to improve the tensile strength of the electrical wire.

[0031] In one embodiment of the present invention, the additive is composed of an antioxidant and a lubricant in a mass ratio of 1~1.5:2~4.

[0032] In one embodiment of the present invention, the antioxidant includes one or both of antioxidant 1010 and antioxidant 168, preferably antioxidant 1010.

[0033] In this invention, an antioxidant is added to the raw material of the insulating layer. By capturing the active free radicals generated during the oxidation of the insulating layer material, the oxidation chain reaction is interrupted, the continuous oxidation reaction is inhibited, and the peroxide is prevented from further causing material degradation, thereby slowing down the thermal oxidation and photo-oxidation aging rate of the insulating layer.

[0034] In one embodiment of the present invention, the lubricant includes one or two of zinc stearate and calcium stearate, preferably zinc stearate.

[0035] In this invention, a lubricant is added to optimize the processing and forming performance of the insulation layer, reduce the frictional resistance during processing, and at the same time help improve the structural integrity and reliability of the insulation layer.

[0036] A specific embodiment of the second aspect of the present invention provides a method for preparing halogen-free flame-retardant electrical wire, comprising the following steps: mixing the insulating layer raw materials evenly and extruding them onto the conductor to obtain halogen-free flame-retardant electrical wire.

[0037] The present invention will now be described in detail with reference to preferred embodiments and comparative examples. The preferred embodiments of the invention described below can be modified in various ways, and therefore the scope of the invention should not be construed as limited to the preferred embodiments described in detail below. Preferred embodiments are provided to help those skilled in the art to more readily understand the invention.

[0038] Unless otherwise specified, the following embodiments and comparative examples are as follows: Ethylene-vinyl acetate copolymer: VA content is 28wt%, model is EVA UL 40028CC; Low-density polyethylene: melt index is 1.6 g / 10 min, model is LDPE LD117; Aluminum hydroxide: average particle size is 800 mesh.

[0039] Example 1 The insulation layer comprises the following raw materials in parts by weight: 60 parts ethylene-vinyl acetate copolymer, 20 parts low-density polyethylene, 30 parts flame retardant, and 3 parts additives; The additives consist of antioxidant 1010 and zinc stearate in a mass ratio of 1:2; The preparation method of the flame retardant includes the following steps: dispersing 5 parts of diethylphosphonoethyltriethoxysilane and 2 parts of phosphate ester titanate coupling agent in 500 parts of solvent, the solvent being composed of ethanol and water in a mass ratio of 10:1, adding 100 parts of aluminum hydroxide, mixing for 3 hours and then drying to obtain composite aluminum hydroxide, mixing the composite aluminum hydroxide with 3 parts of zinc borate and 15 parts of diethylphosphinate aluminum to obtain the flame retardant; the phosphate ester titanate coupling agent is isopropoxytris(dioctylphosphoyloxy) titanate; The preparation method of halogen-free flame-retardant fabric wire includes the following steps: mixing the insulation layer raw materials evenly and extruding them onto the outside of the copper conductor to obtain halogen-free flame-retardant fabric wire.

[0040] Example 2 The insulation layer comprises the following raw materials in parts by weight: 65 parts ethylene-vinyl acetate copolymer, 25 parts low-density polyethylene, 35 parts flame retardant, and 5 parts additives; The additives consist of antioxidant 1010 and zinc stearate in a mass ratio of 1:2; The preparation method of the flame retardant includes the following steps: dispersing 5 parts of diethylphosphonoethyltriethoxysilane and 2 parts of phosphate ester titanate coupling agent in 500 parts of solvent, the solvent being composed of ethanol and water in a mass ratio of 10:1, adding 100 parts of aluminum hydroxide, mixing for 3 hours and then drying to obtain composite aluminum hydroxide, mixing the composite aluminum hydroxide with 4 parts of zinc borate and 18 parts of diethylphosphinate aluminum to obtain the flame retardant; the phosphate ester titanate coupling agent is isopropoxytris(dioctylphosphoyloxy) titanate; The preparation method of halogen-free flame-retardant fabric wire includes the following steps: mixing the insulation layer raw materials evenly and extruding them onto the outside of the copper conductor to obtain halogen-free flame-retardant fabric wire.

[0041] Example 3 The insulation layer comprises the following raw materials in parts by weight: 70 parts ethylene-vinyl acetate copolymer, 30 parts low-density polyethylene, 40 parts flame retardant, and 8 parts additives; The additives consist of antioxidant 1010 and zinc stearate in a mass ratio of 1:2; The preparation method of the flame retardant includes the following steps: dispersing 6 parts of diethylphosphonoethyltriethoxysilane and 3 parts of phosphate ester titanate coupling agent in 500 parts of solvent, the solvent being composed of ethanol and water in a mass ratio of 10:1, adding 100 parts of aluminum hydroxide, mixing for 3 hours and then drying to obtain composite aluminum hydroxide, mixing the composite aluminum hydroxide with 5 parts of zinc borate and 20 parts of diethylphosphinate aluminum to obtain the flame retardant; the phosphate ester titanate coupling agent is isopropoxytris(dioctylphosphoyloxy) titanate; The preparation method of halogen-free flame-retardant fabric wire includes the following steps: mixing the insulation layer raw materials evenly and extruding them onto the outside of the copper conductor to obtain halogen-free flame-retardant fabric wire.

[0042] Example 4 The difference between Example 4 and Example 2 is that the phosphate ester type titanate coupling agent is isopropoxydioleoyloxy(dioctylphosphoyloxy) titanate.

[0043] Example 5 Compared with Example 2, Example 5 differs in that the phosphate ester type titanate coupling agent is composed of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris (dioctylphosphoyloxy) titanate in a mass ratio of 1:2.

[0044] Example 6 Compared with Example 2, Example 6 differs in that the phosphate ester type titanate coupling agent is composed of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris (dioctylphosphoyloxy) titanate in a mass ratio of 1:3.

[0045] Example 7 Compared with Example 6, Example 7 differs in that the ethylene-vinyl acetate copolymer (VA content of 28wt%, model EVA UL 40028CC) is replaced with an equal amount of ethylene-vinyl acetate copolymer (VA content of 33wt%, model EVA UL 04533EH2).

[0046] Example 8 Compared with Example 6, Example 8 differs in that the ethylene-vinyl acetate copolymer (VA content of 28wt%, model EVA UL 40028CC) is replaced with an equal amount of ethylene-vinyl acetate copolymer (VA content of 20wt%, model EVA UL 02020).

[0047] Example 9 The difference between Example 9 and Example 6 is that the ethylene-vinyl acetate copolymer (VA content of 28wt%, model EVA UL 40028CC) is replaced with an equal amount of ethylene-vinyl acetate copolymer (VA content of 39wt%, model EVA UL 05540EH2).

[0048] Example 10 Compared with Example 6, Example 10 differs in that low-density polyethylene (melt index of 1.6 g / 10 min, type LDPE LD117) is replaced with an equal amount of low-density polyethylene with a melt index of 2 g / 10 min, type LDPE LD100.

[0049] Example 11 Compared with Example 6, Example 11 differs in that low-density polyethylene (melt index of 1.6 g / 10 min, type LDPE LD117) is replaced with an equal amount of low-density polyethylene (melt index of 0.6 g / 10 min, type LDPE LD157).

[0050] Example 12 Compared with Example 6, Example 12 differs in that the low-density polyethylene (melt index of 1.6 g / 10 min, type LDPE LD117) is replaced with an equal amount of low-density polyethylene (melt index of 2.3 g / 10 min, type LDPE LD200BW).

[0051] Comparative Example 1 Compared with Example 2, Comparative Example 1 differs in that the preparation method of the flame retardant includes the following steps: dispersing 7 parts of diethylphosphonyl ethyltriethoxysilane in 500 parts of solvent, the solvent being composed of ethanol and water in a mass ratio of 10:1, adding 100 parts of aluminum hydroxide, mixing for 3 hours and then drying to obtain composite aluminum hydroxide, and mixing the composite aluminum hydroxide with 4 parts of zinc borate and 18 parts of diethylphosphonate aluminum to obtain the flame retardant.

[0052] Comparative Example 2 Compared with Example 2, Comparative Example 2 differs in that the preparation method of the flame retardant includes the following steps: dispersing 7 parts of phosphate ester type titanate coupling agent in 500 parts of solvent, the solvent being composed of ethanol and water in a mass ratio of 10:1, adding 100 parts of aluminum hydroxide, mixing for 3 hours and then drying to obtain composite aluminum hydroxide, mixing the composite aluminum hydroxide with 4 parts of zinc borate and 18 parts of aluminum diethylphosphinate to obtain the flame retardant; the phosphate ester type titanate coupling agent is isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate.

[0053] Comparative Example 3 The difference between Comparative Example 3 and Example 2 is that diethylphosphorylethyltriethoxysilane was replaced with an equal amount of γ-aminopropyltriethoxysilane.

[0054] Experimental Example 1 The insulation layers of the halogen-free flame-retardant electrical wires prepared in Examples 1-6 and Comparative Examples 1-3 were tested for oxygen index according to the test method specified in GB / T 2406.2-2009 "Determination of flammability by oxygen index method for plastics - Part 2: Room temperature test"; wherein the sample shape was a type IV sample, the sample size was 100mm×6mm×3mm, and the ignition method was method A.

[0055] The test results are shown in Table 1: Table 1 Performance test results of Examples 1-6 and Comparative Examples 1-3

[0056] As shown in Table 1, when the raw materials of the flame retardant contain both diethylphosphoryl ethyltriethoxysilane and phosphate ester titanate coupling agent, the flame retardant performance of halogen-free flame-retardant wires can be improved. When the phosphate ester titanate coupling agent is composed of isopropoxydioleoyloxy(dioctylphosphoyloxy) titanate and isopropoxytris(dioctylphosphoyloxy) titanate, the flame retardant performance of the obtained halogen-free wires is even better.

[0057] Experimental Example 2 The insulation layer of the halogen-free flame-retardant wires prepared in Examples 6-12 was tested for tensile strength according to the test method specified in GB / T 1040.2-2022. The test speed was 200 mm / min and the sample type was 1A.

[0058] The test results are shown in Table 2: Table 2 Performance test results of Examples 6-12

[0059] As shown in Table 2, when the VA content of ethylene-vinyl acetate copolymer in the insulation layer is 28wt%~33wt% and the melt index of low-density polyethylene is 1.6~2g / 10min, the strength of halogen-free flame-retardant electrical wires can be improved.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A halogen-free flame-retardant electrical wire, comprising a conductor and an insulation layer arranged sequentially from the inside out, characterized in that, The insulating layer comprises the following raw materials in parts by weight: 60-70 parts of ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 30-40 parts of flame retardant, and 3-8 parts of additives. The flame retardant comprises the following raw materials in parts by weight: 100 parts of aluminum hydroxide, 3-5 parts of zinc borate, 15-20 parts of aluminum diethylphosphinate, 5-6 parts of diethylphosphonoethyltriethoxysilane, and 2-3 parts of phosphate ester titanate coupling agent.

2. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The conductor is made of either copper or an aluminum alloy.

3. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The phosphate ester type titanate coupling agent includes one or both of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris(dioctylphosphoyloxy) titanate.

4. The halogen-free flame-retardant electrical wire according to claim 3, characterized in that, When the phosphate ester type titanate coupling agent is composed of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate and isopropoxytris(dioctylphosphoyloxy) titanate, the mass ratio of isopropoxydioleoyloxy (dioctylphosphoyloxy) titanate to isopropoxytris(dioctylphosphoyloxy) titanate is 1:2~3.

5. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The preparation method of the flame retardant includes the following steps: dispersing diethylphosphonoethyltriethoxysilane and phosphate ester titanate coupling agent in a solvent, adding aluminum hydroxide, mixing and drying to obtain composite aluminum hydroxide, and mixing the composite aluminum hydroxide, zinc borate and aluminum diethylphosphonate to obtain the flame retardant.

6. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The VA content of the ethylene-vinyl acetate copolymer is 28wt%~33wt%.

7. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The melt flow index of the low-density polyethylene is 1.6~2 g / 10 min.

8. The halogen-free flame-retardant electrical wire according to claim 1, characterized in that, The additive is composed of an antioxidant and a lubricant in a mass ratio of 1~1.5:2~4.

9. The halogen-free flame-retardant electrical wire according to claim 8, characterized in that, The antioxidant includes one or both of antioxidant 1010 and antioxidant 168.

10. A halogen-free flame-retardant electrical wire according to claim 8, characterized in that, The lubricant includes one or both of zinc stearate and calcium stearate.

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