90DEG C cracking-resistant moisture-proof and flame-retardant polyethylene cable material and preparation method thereof

A technology of flame-retardant polyethylene and cable materials, which is applied in the direction of circuits, electrical components, plastic/resin/wax insulators, etc. It can solve the problems of reducing material strength and toughness, potential safety hazards of cable products, and increasing the amount of inorganic flame retardants added, etc. problems, achieve high tensile strength and elongation at break, excellent physical and mechanical strength, and outstanding crack resistance

Pending Publication Date: 2020-03-24
中广核三角洲(江苏)塑化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the halogen-free flame retardant system mainly uses hydrated hydroxide as the main flame retardant, this kind of flame retardant has low flame retardant efficiency, and the addition of inorganic flame retardant must be increased to pass the cable combustion test
Because of the increase in the filling amount of the inorganic flame retardant, the strength and toughness of the material are reduced; and because the expansion coefficient of the polymer matrix material and the inorganic flame retardant is quite different, in the process of thermal expansion and contraction, due to uneven Shrinkage causes structural defects and internal stress, so the halogen-free flame-retardant polyethylene material is easy to crack, which is a fatal defect of cable products
[0004] The hydrated hydroxide as the main flame retarda

Method used

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  • 90DEG C cracking-resistant moisture-proof and flame-retardant polyethylene cable material and preparation method thereof
  • 90DEG C cracking-resistant moisture-proof and flame-retardant polyethylene cable material and preparation method thereof
  • 90DEG C cracking-resistant moisture-proof and flame-retardant polyethylene cable material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A 90°C crack-resistant, moisture-resistant, flame-retardant polyethylene cable material is made of the following raw materials by weight:

[0034] 60 parts of polyethylene, the polyethylene is a mixture of metallocene linear low-density polyethylene, bimodal polyethylene and high-density polyethylene, and the melt index of the polyethylene is 0.2g / 10min;

[0035] 10 parts of vinyl copolymer, described vinyl copolymer is the mixture of ethylene-vinyl acetate copolymer, ethylene-octene copolymer and EPDM rubber, and described vinyl copolymer melt index is 0.5g / 10min;

[0036] 10 parts of maleic anhydride grafted ethylene-vinyl acetate copolymers, the grafting rate is 0.6%, and the melt index is 0.1g / 10min;

[0037] 50 parts of hydroxide flame retardant, described hydroxide flame retardant is that aluminum hydroxide and magnesium hydroxide are mixed according to weight ratio 3:1;

[0038] Nano sepiolite 5 parts, its specific surface area is 50m 2 / g;

[0039] 5 parts of...

Embodiment 2

[0046] A 90°C crack-resistant, moisture-resistant, flame-retardant polyethylene cable material is made of the following raw materials by weight:

[0047] 90 parts of polyethylene, described polyethylene is the mixture of metallocene linear low density polyethylene, bimodal polyethylene and high density polyethylene, and the melting index of described polyethylene is 20g / 10min;

[0048] 20 parts of ethylene-based copolymers, the ethylene-based copolymers are a mixture of ethylene-vinyl acetate copolymers, ethylene-octene copolymers and EPDM rubber, and the melt index of the ethylene-based copolymers is 0.5-5g / 10min ;

[0049] 20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, its graft rate 1.2%, melt index is 1.0g / 10min;

[0050] 100 parts of hydroxide flame retardant, described hydroxide flame retardant is that aluminum hydroxide and magnesium hydroxide are mixed according to weight ratio 3:1;

[0051] 20 parts of nano sepiolite, its specific surface are...

Embodiment 3

[0059] A 90°C crack-resistant, moisture-resistant, flame-retardant polyethylene cable material is made of the following raw materials by weight:

[0060] 70 parts of polyethylene, described polyethylene is the mixture of metallocene linear low-density polyethylene, bimodal polyethylene and high-density polyethylene, and the melting index of described polyethylene is 5g / 10min;

[0061] 15 parts of vinyl copolymer, described vinyl copolymer is the mixture of ethylene-vinyl acetate copolymer, ethylene-octene copolymer and EPDM rubber, and described vinyl copolymer melt index is 2g / 10min;

[0062] 15 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, its graft rate 1%, melt index is 5g / 10min;

[0063] 60 parts of hydroxide flame retardant, described hydroxide flame retardant is that aluminum hydroxide and magnesium hydroxide are mixed according to weight ratio 3:1;

[0064] Nano sepiolite 10 parts, its specific surface area is 50m 2 / g;

[0065] 10 parts of syn...

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Abstract

The invention discloses a 90DEG C cracking-resistant moisture-resistant and flame-retardant polyethylene cable material and a preparation scheme thereof. The cable material is composed of the following components by weight: 60-90 parts of polyethylene, 10-20 parts of a vinyl copolymer, 10-20 parts of a compatilizer, 50-100 parts of a hydroxide flame retardant, 5-20 parts of sepiolite, 5-20 parts of a synergistic flame retardant, 1-3 parts of aminosilane, 1-3 parts of an antioxidant, 0.5-1.5 parts of an ultraviolet light absorber and 2-5 parts of a lubricant. The 90-DEG C cracking-resistant moisture-resistant and flame-retardant polyethylene cable material disclosed by the invention has the characteristics of resistance to a low temperature of -50DEG C, outstanding cracking resistance, insulativity and moisture resistance (volume resistivity of 70DEG C*168h after immersion), good flame retardance, low smoke, no toxicity and the like, also has the advantages of fast extrusion processingspeed, difficult generation of air holes, etc., and can be widely applied to an outer sheath layer of a 1kV-220kV cable.

Description

technical field [0001] The invention relates to the field of low-smoke, halogen-free, flame-retardant cable materials, in particular to a 90°C crack-resistant, moisture-resistant, flame-retardant polyethylene cable material and a preparation method thereof. [0002] technical background [0003] The international community and my country have increasingly stringent requirements for environmental protection and safety, and the environmentally friendly halogen-free flame-retardant polyethylene has received extensive attention. Because the halogen-free flame retardant system mainly uses hydrated hydroxide as the main flame retardant, this kind of flame retardant has low flame retardant efficiency, and the addition of inorganic flame retardant must be increased to pass the cable combustion test. Because of the increase in the filling amount of the inorganic flame retardant, the strength and toughness of the material are reduced; and because the expansion coefficient of the polyme...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08L23/16C08L51/06C08L27/18C08K13/02C08K3/22C08K3/34C08K3/32C08K3/02C08K5/134C08K5/375C08K5/3475C08K5/3435C08K5/544H01B3/44
CPCC08L23/0815C08L23/06H01B3/441C08L2201/02C08L2203/202C08L2205/025C08L2205/035C08L2207/062C08K2003/2227C08K2003/2224C08K2201/011C08K2003/323C08K2003/026C08L23/0853C08L23/16C08L51/06C08L27/18C08K13/02C08K3/22C08K3/34C08K3/32C08K3/02C08K5/1345C08K5/375C08K5/3475C08K5/3435C08K5/544
Inventor 谢飞张凡凡陆祁王传博
Owner 中广核三角洲(江苏)塑化有限公司
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