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

A technology of polyolefin cable material and polyethylene, which is applied in the direction of circuits, electrical components, insulators, etc., can solve the problems of unsatisfactory cable materials, increase the surface treatment process of fillers, and adverse environmental effects, and meet the requirements of industrial scale-up production. Excellent Effect of melt flow rate, good processability

Active Publication Date: 2016-08-31
JIANGSU ZHONGLI GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, although the aforementioned CN102250409B uses a method of combining a compatibilizer and a coupling agent to solve the compatibility problem of the resin and the flame retardant, the formula system tends to be complicated, and the process of surface treatment of the filler is added, which increases energy consumption. Reduced production efficiency and increased production costs; aforementioned CN101597395B not only used a compatibilizer, but the compatibilizer needed to be self-made, and used some organic solvents and irradiation techniques, which not only complicated the process, but also had adverse effects on the environment; the aforementioned CN103030917A due to In terms of technology, it is necessary to prepare the graft base first, and then carry out blending and granulation, so the process is complicated
[0005] Although the cable materials involved in the above patents and patent application schemes can meet the basic needs of the current market, when higher requirements are placed on certain properties of the materials, especially when multiple properties (such as cold resistance, oil resistance and 90 ° C It still has outstanding insulation performance) and has high requirements, this kind of cable material is difficult to meet
With EVA resin as the main matrix, the high temperature insulation of the material, especially in a humid environment (such as 90°C water), is not high. For example, it meets the aforementioned cold resistance, oil resistance and still has a high insulation resistance at 90°C. Cable materials, the cable materials in the above patents are difficult or even impossible to meet
In addition, in view of the poor compatibility of resins and flame retardants, the method of adding compatibilizers is generally used to solve the problem, and the technical route is relatively simple

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 30 parts by weight of ethylene-alpha propylene copolymer, 60 parts of linear low density polyethylene with a melt flow rate of 10 g / min, 100 parts of magnesium hydroxide, 10 parts of aluminum hydroxide, 10 parts of melamine, 10 parts of melamine polyphosphate, 0.05 parts of di-tert-butyl peroxide (that is, di-tert-butyl peroxide ), 0.5 parts of γ-aminopropyltriethoxysilane, hard Put 2 parts of n-butyl fatty acid and 0.6 parts of antioxidant 1010 into the internal mixer for mixing, that is, banburying. When the temperature of the material is 130°C, the output is sent into the conical feeding hopper, and the conical feeding The hopper is introduced into the twin-screw extruder to melt and extrude, and after cooling, a low-smoke, halogen-free, flame-retardant polyolefin cable material is obtained. The temperature of zone to zone 9 is controlled as follows: Zone 1 95°C, Zone 2 100°C, Zone 3 115°C, Zone 4 120°C, Zone 5 130°C, Zone 6 135°C, Zone 7 120°C, Zone 8 115°C, 105°C ...

Embodiment 2

[0024] Example 1:

[0025]30 parts of ethylene-α-butene copolymers, 30 parts of ethylene-α-hexene copolymers, 20 parts of ethylene-α-octene copolymers and 1 g / min linear low A mixture of 1 part of high-density polyethylene and 10 parts of linear low-density polyethylene with a melt flow rate of 8 g / min, 150 parts of flame retardant A, namely basic magnesium carbonate (or magnesium hydroxide), and 150 parts of flame retardant B, namely boric acid 10 parts of zinc, 0.05 parts of bis(3,5,5-trimethylhexanoyl) peroxide [also called (bis) peroxide 3,5,5-trimethylhexanoyl] as initiator, 0.05 parts of di 0.05 parts of benzoyl, 1.5 parts of isopropoxy tri(dioctyl phosphate) titanate as a coupling agent, 3 parts of liquid paraffin as a lubricant, 0.5 parts of antioxidant 168 and 0.5 parts of antioxidant 300 are put into banburying Mixing in the machine means banburying. When the temperature of the material is 150°C, the material is discharged into the conical feeding hopper, introduced...

Embodiment 3

[0027] 80 parts by weight of ethylene-alpha-butene copolymer, 20 parts of linear low-density polyethylene with a melt flow rate of 6 g / min, 200 parts of flame retardant A, namely alkali aluminum hydroxide, initiator That is, 0.2 parts of cumyl peroxyneodecanoate, 2.5 parts of 3-methacryloxypropyl trimethoxysilane as a coupling agent, 5 parts of a silicone masterbatch and 5 parts of an antioxidant DSTDP ( It is also possible to use 0.1 part of antioxidant 1010) and put it into the internal mixer for mixing, that is, banburying. When the temperature of the material is 140°C, the material is discharged into the conical feeding hopper, and the conical feeding hopper is introduced into the twin-screw. Melt and extrude in the extruder and cool to obtain low-smoke, halogen-free, flame-retardant polyolefin cable material. The temperature is controlled as follows: Zone 1 90°C, Zone 2 105°C, Zone 3 120°C, Zone 4 125°C, Zone 5 135°C, Zone 6 130°C, Zone 7 125°C, Zone 8 120°C, Zone 9 105°C...

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Abstract

The invention provides a low-smoke, halogen-free and flame retardant polyolefin cable material and a preparation method thereof and belongs to the technical field of modified materials of wires and cables. The preparation method comprises the following steps of: weighing the following materials in parts by weight: 30 to 80 parts of ethylene-alpha-olefin copolymer, 20 to 60 parts of polyethylene, 100 to 200 parts of fire retardant A, 0 to 20 parts of fire retardant B, 0.01 to 0.2 part of initiator, 0.5 to 2.5 parts of coupling agent, 1 to 5 parts of lubricant, and 0.1 to 1 part of antioxidant; mixing all the materials above to an internal mixer and discharging until the temperature reaches 130 to 150 DEG C; transferring into a tapered feeding bucket; melting and extruding through a twin-screw extruder; controlling the temperature from the first area to the ninth area of the twin-screw extruder and the temperature of a head of the twin-screw extruder; and then carrying out cold cutting to obtain the polyolefin cable material. The low-smoke, halogen-free and flame retardant polyolefin cable material is high in processing performance, and outstanding in cracking resistance and resistance to low temperature, improves the compatibility between resin and the fire retardant, is simple and short in process, has no rigorous process factors, reaches the energy-saving purpose, and also meets the massive industrial production requirement.

Description

technical field [0001] The invention belongs to the technical field of wire and cable modified materials, in particular to a low-smoke, halogen-free flame-retardant polyolefin cable material, and also relates to a preparation method thereof. Background technique [0002] With more than ten years of research, application and continuous improvement in the industry, low-smoke, halogen-free, flame-retardant polyolefin cable materials and their preparation and application technologies are becoming mature, so that the application of low-smoke, halogen-free, flame-retardant polyolefin cable materials The field continues to expand, and the market usage also increases. At present, the low-smoke, halogen-free and flame-retardant polyolefin cable materials produced and used at home and abroad generally use ethylene-vinyl acetate copolymer (EVA) as the main matrix material, and polyethylene (PE) and ethylene-α-olefin as auxiliary matrix materials. , Aluminum hydroxide or magnesium hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08K13/02C08K3/22C08K3/26C08K5/3492C08K3/38C08K3/32B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08L23/0815C08L2201/02C08L2201/22C08L2203/202C08L2205/025C08L2205/03C08L2205/035H01B3/441C08K13/02C08K2003/2224C08K2003/2227C08K5/34922C08K2003/267C08K3/38C08L83/04B29C48/04B29C48/40B29C48/875B29C48/911B29C2948/92828B29C2948/92895B29C2948/92904
Inventor 邵海彬顾轩臣谢红国孙建宇程娴王世通
Owner JIANGSU ZHONGLI GRP CO LTD
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