A low-smoke halogen-free flame-retardant polyolefin cable material and its preparation method

A technology of polyolefin cable material and ethylene, which is applied in the direction of circuits, electrical components, plastic/resin/wax insulators, etc., can solve the problems of difficult to obtain high oxygen index and high mechanical performance cable materials, and achieve large-scale industrial production, Improve flame retardancy and mechanical properties, and design scientific, reasonable and simple effects

Active Publication Date: 2020-05-05
SICHUAN UNFIRE POLYMER MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the first purpose of the present invention is to provide a low-smoke halogen-free flame-retardant polyolefin cable material to solve the problem that it is difficult to obtain a high oxygen index and high mechanical performance cable material in the prior art

Method used

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  • A low-smoke halogen-free flame-retardant polyolefin cable material and its preparation method
  • A low-smoke halogen-free flame-retardant polyolefin cable material and its preparation method

Examples

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preparation example Construction

[0018] A preparation method of a low-smoke halogen-free flame-retardant polyolefin cable material comprises: (1) mixing ethylene-vinyl acetate copolymer, elastomer, magnesium hydroxide, polyphosphazene, PPE-MAH and processing aids in parts by weight Specific mixing, mechanical stirring to obtain the mixture; wherein, preferably, a high-speed mixer is used for mixing, the speed of the high-speed mixer is 700-900rpm, and the stirring time is at least 3min to achieve better mixing effect;

[0019] (2) Extrude and pelletize the mixture to obtain a low-smoke, halogen-free, flame-retardant polyolefin cable compound; preferably, a twin-screw extruder is used to extrude the mixture, in order to achieve a better extrusion effect and further improve the mechanical properties of the product Performance, preferably, the diameter of the twin-screw extruder is less than 200mm; the aspect ratio is 36-44:1; the rotation speed of the main engine is 250-1800rpm; the temperature of the barrel is ...

Embodiment 1

[0022] This example provides a low-smoke, halogen-free, flame-retardant polyolefin cable material. The raw materials include: 34 parts of ethylene-vinyl acetate copolymer, 5 parts of polyolefin elastomer, 55 parts of magnesium hydroxide, polyphosphorus 5 parts of nitrile, 0.5 part of PPE-MAH, 0.25 part of antioxidant 1010 and 0.25 part of calcium stearate.

[0023] The present embodiment provides a kind of preparation method of low-smoke halogen-free flame-retardant polyolefin cable material, comprising: (1) ethylene-vinyl acetate copolymer, elastomer, magnesium hydroxide, polyphosphazene, PPE-MAH and processing The additives are mixed according to the above weight ratio, and the high-speed mixer with a rotation speed of 700-900rpm is used for mixing for at least 3 minutes; (2) The mixture is extruded by a twin-screw extruder, and the diameter of the twin-screw extruder is less than 200mm ;Length-to-diameter ratio is 36-44:1; main engine speed is 250-1800rpm; barrel temperatur...

Embodiment 2

[0025] This example provides a low-smoke, halogen-free, flame-retardant polyolefin cable material. The raw materials include, by weight fraction: 23 parts of ethylene-vinyl acetate copolymer, 10 parts of EPDM rubber, 61 parts of magnesium hydroxide, poly 5 parts of phosphazene, 0.5 part of PPE-MAH, 0.25 part of antioxidant 1010 and 0.25 part of calcium stearate.

[0026] This example provides a method for preparing a low-smoke, halogen-free, flame-retardant polyolefin cable material. Please refer to Example 1 for specific steps.

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Abstract

The invention belongs to the technical field of chemical materials, and provides a low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof. The cable materialis prepared from, by weight, 17-39 parts of ethylene-vinyl acetate copolymer, 5-10 parts of elastomer, 55-65 parts of magnesium hydroxide, 0.5-5 parts of polyphosphazene and 0.5-2 parts of maleic anhydride grafted polypheylene ether (PPE-MAH); the problem that in the prior art, the cable material with the high oxygen index and high mechanical property is difficult to obtain is solved. The preparation method comprises the steps that 1, the ethylene-vinyl acetate copolymer, the elastomer, the magnesium hydroxide, the polyphosphazene, the PPE-MAH and a processing agent are mixed according to theweight parts, mechanical stirring is conducted, and a mixture is obtained; 2, the mixture is extruded and diced, and the low-smoke halogen-free flame-retardant polyolefin cable material is obtained;the preparation method is scientific, reasonable and simple in design, easy to operate and capable of achieving large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof. Background technique [0002] With the rapid development of the global economy and the continuous strengthening of human awareness of environmental protection, green, low-carbon and environmentally friendly buildings have become the development trend of the construction industry. The higher the building above the ground, the larger the scale of the underground facilities. It is also becoming denser, and more and more fires are caused by the damage or aging of the cable sheath. How to reduce the incidence of fire and the mortality rate of fire, low smoke, halogen-free, flame retardant and environmental protection have become the core of the wire and cable industry. R & D application direction. Contents of the invention [0003] In view of the above-mention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L85/02C08L51/08C08K3/22H01B3/44
CPCC08K2003/2224C08L23/0853C08L2201/02C08L2201/22C08L2203/202C08L2205/03H01B3/441C08L85/02C08L51/08C08K3/22
Inventor 王冲刘举付登强杨华侨唐陈林
Owner SICHUAN UNFIRE POLYMER MATERIALS TECH
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