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Flame-retardant polyethylene sheath material and preparation method thereof

A technology of flame-retardant polyethylene and sheathing materials, which is applied in plastic/resin/wax insulators, organic insulators, electrical components, etc. Ethylene sheath material, oxygen index less than 30% and other problems, to solve the problem of high temperature pressure, excellent heat resistance, excellent mechanical properties

Active Publication Date: 2018-05-11
CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the patent documents CN104177693A and CN103351555A, although the halogen-free flame-retardant polyethylene cable material has been prepared, its oxygen index cannot meet the requirement of 30%, and the elongation at break is very low, which cannot meet the high requirements of the flame-retardant polyethylene sheath material
In the patent CN106543514A, the elongation at break of the material can meet the requirements of the standard, but only for the anti-cracking performance, and the high-temperature pressure performance of the material has not been measured
In the patent CN105623042A, improvements have been made to the matrix resin, but the rest of the additives used are various and the process is complicated, which is not conducive to the promotion of production
[0004] Some of the cable materials in the above-mentioned patent documents can meet the needs of the market, but it is difficult for similar products to meet the relevant requirements, especially high temperature When the pressure conditions are harsh (110°C, 6h), the performance indicators such as oxygen index and mechanical properties of similar products basically fail to meet the requirements

Method used

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  • Flame-retardant polyethylene sheath material and preparation method thereof
  • Flame-retardant polyethylene sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 90 parts of high-density polyethylene (melt flow rate: 10g / 10min), 10 parts of ethylene and vinyl acetate copolymer resin with VA content of 40%, 100 parts of magnesium hydroxide, 5 parts of ammonium polyphosphate, 0.1 part of antioxidant Agent 1076, 5 parts of silicone masterbatch, 0.5 part of trimethoxysilane, 10 parts of maleic anhydride grafted ethylene-vinyl acetate, 20 parts of carbon black masterbatch (component by weight: carbon black 40%, carrier 60% ) into the internal mixer, and then start mixing, until the temperature of the material is 120 ° C ~ 150 ° C, the material is discharged into the conical feeding hopper, extruded by a twin-screw extruder, granulated, and cold cut to obtain the product . The temperature of each section of the extruder is as follows: Zone 1 110°C, Zone 2 115°C, Zone 3 130°C, Zone 4 155°C, Zone 5 165°C, Zone 6 170°C, Zone 7 170°C, Zone 8 170°C, Zone 9 Zone 165°C, head temperature 160°C. Table 1 shows the performance test results of ...

Embodiment 2

[0033] In turn, 60 parts of high-density polyethylene (melt flow rate is 1.0g / 10min), 40 parts of ethylene and vinyl acetate copolymer resin with VA content of 15%, 70 parts of basic magnesium carbonate, 25 parts of zinc borate, 3 parts of antioxidant Agent 300, 1 part of high-viscosity silicone oil, 2 parts of methyl orthosilicate, 30 parts of maleic anhydride grafted polyolefin elastomer, 5 parts of carbon black masterbatch (components by weight percentage: carbon black 50%, carrier 50%) Put it into the internal mixer, then start mixing, and when the temperature of the material is 120°C to 150°C, the material is discharged into the conical feeding hopper, extruded by a twin-screw extruder, granulated, and cold cut to obtain the product. The temperature of each section of the extruder is as follows: Zone 1 120°C, Zone 2 130°C, Zone 3 135°C, Zone 4 150°C, Zone 5 180°C, Zone 6 180°C, Zone 7 175°C, Zone 8 170°C, Zone 9 Zone 160°C, head temperature 155°C. Table 1 shows the perfo...

Embodiment 3

[0035] In turn, 70 parts of high-density polyethylene (melt flow rate is 12g / 10min), 30 parts of ethylene and vinyl acetate copolymer resin with VA content of 28%, 80 parts of aluminum hydroxide, 20 parts of melamine, 1.5 parts of antioxidant 1010 , 4 parts of silicone masterbatch, 1 part of tetraethyl orthosilicate, 25 parts of maleic anhydride grafted metallocene linear low density polyethylene, 10 parts of carbon black masterbatch (component by weight percentage: carbon black 40%, carrier 60 %) into the internal mixer, and then start mixing, until the temperature of the material is 120 ° C ~ 150 ° C, the material is discharged into the conical feeding hopper, extruded by a twin-screw extruder, granulated, and cold cut to obtain product. The temperature of each section of the extruder is as follows: Zone 1 115°C, Zone 2 125°C, Zone 3 140°C, Zone 4 160°C, Zone 5 170°C, Zone 6 175°C, Zone 7 175°C, Zone 8 165°C, Zone 9 Zone 155°C, head temperature 155°C. Table 1 shows the per...

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Abstract

The invention discloses a flame-retardant polyethylene sheath material and a preparation method thereof. 60 to 100 parts of polyethylene, 10 to 40 parts of ethylene and vinyl acetate copolymer resin,70 to 100 parts of flame retardant A, 5 to 25 parts of flame retardant B, 0.1 to 3 parts of antioxidant, 1 to 5 parts of lubricant, 0.5 to 2 parts of coupling agent, 10 to 30 parts of compatibilizer,5 to 20 parts of carbon black masterbatch are added into a mixer successively during preparation, then mixing is conducted, when material temperature is 120 DEG C to 150 DEG C, discharged materials are sent into a cone feeding hopper, a twin screw extruder conducts extrusion granulation, and cold cutting is conducted to obtain products. The flame-retardant polyethylene sheath material has good flame retardancy, excellent mechanical properties and heat resistance. After the products are prepared into a wire and cable, the wire and cable can pass a high temperature pressure test.

Description

technical field [0001] The invention relates to a cable sheath material, in particular to a flame-retardant polyethylene sheath material. The invention also relates to a preparation method of the flame-retardant polyethylene sheath material. Background technique [0002] Polyethylene is a commonly used thermoplastic with light weight, non-toxic and environmental protection, and excellent electrical insulation properties. It is widely used in the field of wires and cables. Because most of the wires and cables in the past were PVC products, PVC products are poisonous and harmful, not environmentally friendly, and will release a large amount of toxic and harmful gases after burning, causing great harm. In order to meet the two requirements of low-smoke and halogen-free, low-smoke and halogen-free polyolefin cables add a large amount of inorganic flame retardants, resulting in a significant decrease in the mechanical properties of the material and failing to meet the requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L83/04C08L51/06C08K13/02C08K3/22C08K3/32C08K5/134C08K3/04C08K3/38C08K5/3492H01B3/44
CPCC08K2003/2224C08K2003/2227C08K2003/323C08K2003/387C08L23/06C08L2201/02C08L2201/08C08L2203/202C08L2205/035C08L2207/062H01B3/441C08L23/0853C08L83/04C08L51/06C08K13/02C08K3/22C08K3/32C08K5/1345C08K3/04C08K3/38C08K5/34922
Inventor 孙晓东邵海彬陶连敏吴鑫张尔梅朱俊王春丽
Owner CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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