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Crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material and its preparation method

A flame retardant cable, low temperature resistance technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of low temperature resistance and mechanical properties, poor combustion crust performance, mechanical properties and other problems, to achieve excellent electrical properties, excellent The effect of mechanical properties, excellent oil resistance

Inactive Publication Date: 2012-06-06
SHANGHAI SPECIAL CABLE ELECTROTECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, poor oil resistance and weak bonding with mineral fillers are its main disadvantages
[0005] The oil resistance of EVA is related to the content of VA. The higher the VA content, the better the oil resistance, but the low temperature resistance and mechanical properties will decrease accordingly.
The low temperature resistance can be improved by adding plasticizer, but the mechanical properties of the material will be reduced
At the same time, the currently commonly used low-smoke halogen-free flame-retardant cable materials mostly use inorganic flame-retardant systems such as magnesium hydroxide and aluminum hydroxide. The purpose of burning, because of its poor combustion crust performance, so the self-extinguishing performance is poor

Method used

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  • Crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material and its preparation method
  • Crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material and its preparation method
  • Crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in this embodiment includes the following steps:

[0046] 1) Weigh the raw materials according to the raw material components and corresponding weights of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in Example 1 in Table 1.

[0047] 2) The raw materials weighed are placed in a high-speed mixer for mixing and stirring, and the mixing time is 5min, and then two times of extrusion granulation is carried out through a twin-screw extruder, and the temperature in the twin-screw extruder is 120-145°C.

[0048] The mixing speed of the high-speed mixer is 800rpm. The screw temperatures of each section starting from the feeding section in the twin-screw extruder are: 120°C, 125°C, 130, 135°C, 140°C, 145°C, 140°C, 135°C, 130°C.

[0049] 3) The granulated pellets are plasticized...

Embodiment 2

[0054] The preparation of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in this embodiment includes the following steps:

[0055] 1) Weigh the raw materials according to the raw material components and corresponding weights of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in Example 2 in Table 1.

[0056] 2) The raw materials weighed are placed in a high-speed mixer for mixing and stirring, and the mixing time is 8min, and then two times of extrusion granulation is carried out through a twin-screw extruder, and the temperature in the twin-screw extruder is 120-145°C.

[0057] The mixing speed of the high-speed mixer is 1000rpm. The screw temperatures of each section starting from the feeding section in the twin-screw extruder are: 120°C, 125°C, 130, 135°C, 140°C, 145°C, 140°C, 135°C, 130°C.

[0058] 3) The granulated pellets are plasticize...

Embodiment 3

[0063] The preparation of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in this embodiment includes the following steps:

[0064] 1) Weigh the raw materials according to the raw material components and corresponding weights of the cross-linked oil-resistant and low-temperature resistant low-smoke halogen-free flame-retardant cable material in Example 3 in Table 1.

[0065] 2) The raw materials weighed are placed in a high-speed mixer for mixing and stirring, and the mixing time is 6min, and then two times of extrusion granulation is carried out through a twin-screw extruder, and the temperature in the twin-screw extruder is 120-145°C.

[0066] The mixing speed of the high-speed mixer is 800rpm. The screw temperatures of each section starting from the feeding section in the twin-screw extruder are: 120°C, 125°C, 130, 135°C, 140°C, 145°C, 140°C, 135°C, 130°C.

[0067] 3) The granulated pellets are plasticized...

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Abstract

The invention belongs to the wire and cable material field, and relates to a crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material and its preparation method. The crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material comprises the following raw materials by weight percentage: 10-20% of ethane-vinyl acetate copolymer with low VA content, 10-20% of ethane-vinyl acetate copolymer with high VA content, 10-30% of graft polyolefin, 40-60% of fire retardant, 1-10% of crustization agent, 2-5% of plasticizer, 1-3% of crosslinking sensitizing agent, 0.5-3% of anti-oxidant, 0.5-2% of processing auxiliary agent and 0-3% of colouring agent. The obtained cable material has the advantages of relative balance and excellent mechanical property, oil resistant performance, low temperature resistance performance, flame resistance and the like. The crosslinked, oil-resistant, low temperature-resistant, low-smoke, halogen-free and flame-retardant cable material of the present invention can be widely used in the track traffic vehicle cable field.

Description

technical field [0001] The invention belongs to the field of wire and cable materials, and relates to a cross-linked oil-resistant and low-temperature resistant low-smoke, halogen-free, flame-retardant cable material and a preparation method thereof. Background technique [0002] In recent years, with the country's emphasis on environmental protection and safety, low-smoke halogen-free flame-retardant cables are required in some large buildings or public places, such as large shopping malls, entertainment venues, subways, stations, ships, and nuclear power plants. As a result, the demand for low-smoke halogen-free flame-retardant cable materials has grown rapidly in recent years. According to rough statistics, the output of halogen-free flame-retardant cable materials in the Yangtze River Delta alone exceeded 100,000 tons in 2009. [0003] Halogen-free flame-retardant cable materials have not only achieved rapid growth in product output, but also have higher requirements in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L31/04C08L51/06C08K13/06C08K3/22C08K3/02C08K3/38H01B7/17H01B7/295
Inventor 葛小言
Owner SHANGHAI SPECIAL CABLE ELECTROTECHN
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