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Nuclear power halogen-free, low-smoke and flame-retardant cable sheath material with high elongation and long service life and preparation method thereof

A cable sheathing material, low-smoke flame-retardant technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problem of the decrease of tensile strength and elongation at break, the weakening of the physical and mechanical properties of the sheath, and the decrease of the melt index of the cable material, etc. problems, to achieve the effect of improving compatibility, high strength, and good thermal oxygen aging performance

Active Publication Date: 2013-09-04
BAOSHENG SCI & TECH INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a large amount of inorganic flame retardant is added to polyolefin, if the proportion of flame retardant filler is not suitable, it will inevitably weaken the physical and mechanical properties of the sheath, resulting in a significant decrease in its tensile strength and elongation at break, causing cable sheath Cracks, shortening cable life
At the same time, another problem caused by adding a large amount of inorganic flame-retardant fillers is that the melt index of the cable material decreases and the fluidity becomes poor.
As a result, the hardness of the material is relatively high, and it is difficult to extrude, which puts forward higher requirements for the equipment

Method used

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  • Nuclear power halogen-free, low-smoke and flame-retardant cable sheath material with high elongation and long service life and preparation method thereof
  • Nuclear power halogen-free, low-smoke and flame-retardant cable sheath material with high elongation and long service life and preparation method thereof
  • Nuclear power halogen-free, low-smoke and flame-retardant cable sheath material with high elongation and long service life and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Halogen-free, low-smoke, flame-retardant, high-elongation, long-life cable sheathing material for nuclear power, composed of the following components by weight: 100 parts of resin base material, 100-150 parts of composite flame retardant, synergistic flame retardant 5-25 parts, 3-20 parts of the first interfacial compatibilizer, 1.5-4 parts of composite antioxidant, 2-5 parts of lubricant;

[0031] The resin base material is composed of any two or more of ethylene-vinyl acetate copolymer, linear low-density polyethylene, ethylene-octene elastomer and a second interfacial compatibilizer, wherein the ethylene-vinyl acetate copolymer The parts by weight are 30-60 parts, the parts by weight of linear low density polyethylene are 20-50 parts, the parts by weight of ethylene-octene elastomer are 10-30 parts, and the parts by weight of the second interface compatibilizer are 10-50 parts. 30 parts, composed of maleic anhydride graft and silicone masterbatch;

[0032] The compo...

Embodiment 2

[0047] The purpose of this example is to provide a kind of halogen-free, low-smoke, flame-retardant, high-elongation and long-life cable sheath material for nuclear power, with an elongation of 420%, a strength of 9.2 Mpa, and a hardness of 95. It has excellent processing performance and is easy to extrude. .

[0048] Halogen-free, low-smoke, flame-retardant, high-elongation, long-life cable sheathing material for nuclear power, its raw materials include: main matrix composed of ethylene vinyl acetate copolymer, linear low-density polyethylene and ethylene octene elastomer Anhydride grafted POE material and silicone masterbatch are used as interfacial compatibilizer, flame retardant system composed of aluminum hydroxide, magnesium hydroxide, zinc borate, lubrication system composed of silicone oil, polyethylene wax and zinc stearate, high Low-temperature compound antioxidant as an anti-aging system.

[0049] The raw materials of the above-mentioned cable sheath materials incl...

Embodiment 3

[0065] The purpose of this embodiment is to provide a halogen-free, low-smoke, flame-retardant, high-elongation, long-life cable sheath material for nuclear power, with an oxygen index of 45%, a strength of 10 Mpa, and an elongation of 220%. The cable has passed the flame retardant Class A bunching burning test.

[0066] Halogen-free, low-smoke, flame-retardant, high-elongation, long-life cable sheathing material for nuclear power, its raw materials include: main matrix composed of ethylene vinyl acetate copolymer, linear low-density polyethylene and ethylene-octene elastomer Anhydride-grafted EVA material and silicone masterbatch are used as interface compatibilizers, a flame retardant system composed of aluminum hydroxide, magnesium hydroxide, zinc borate and nitrogen-phosphorus intumescent nano-composite flame retardants, polyethylene wax and Lubricating system composed of zinc stearate, anti-aging system composed of a high and low temperature resistant compound antioxidant...

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Abstract

The invention discloses a nuclear power halogen-free, low-smoke and flame-retardant cable sheath material with high elongation and long service life and a preparation method thereof, and belongs to the technical field of materials for electric wires and cables. The cable sheath material is characterized by consisting of the following components in parts by weight: 100 parts of a resin base material, 100 to 150 parts of composite flame retardant, 5 to 25 parts of coordinated flame retardant, 3 to 20 parts of a first interface compatilizer, 1.5 to 4 parts of composite antioxidant, and 2 to 5 parts of lubricating agent. The cable sheath material has high mechanical property, particularly elongation at break, good thermo-oxidative aging resistance and long service life; the inherent triangular contradiction of electric, mechanical and flame-retardant properties of the halogen-free, low-smoke and flame-retardant cable sheath material can be effectively solved; meanwhile, the cable sheath material is excellent in processing performance, facilitates extrusion molding, and is scientific and reasonable in formula and proportion and advanced in process.

Description

technical field [0001] The invention relates to a cable sheath material and a preparation method thereof, especially a halogen-free low-smoke flame-retardant high elongation and long-life cable sheath material for nuclear power and a preparation method thereof, belonging to materials (cable materials) for wires and cables technology field. Background technique [0002] Halogen-free low-smoke flame-retardant polyolefin materials are generally based on EVA or PE. This type of resin is a flammable polymer halogen-free material. Its molecular structure is linear and its oxygen index generally does not exceed 20. It is flammable itself. Combustion will decompose water and carbon dioxide. In order to achieve the desired flame retardant effect, it is necessary to add a large amount of flame retardants (such as AI(OH) 3 or Mg(OH) 2 )Wait. When this type of oxide is heated, it will release a certain amount of crystal water and absorb a large amount of heat, thereby inhibiting its...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08L51/00C08L83/04C08K13/02C08K3/22C08K3/38C08K5/098H01B3/44H01B7/17
Inventor 李茁实王永董春邹红飞徐云海郝建薇胡源黄崇祺
Owner BAOSHENG SCI & TECH INNOVATION
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