CN105086327A - Manufacturing technology of shielded cable capable of working for long time at temperature of 95 DEG C - Google Patents
Manufacturing technology of shielded cable capable of working for long time at temperature of 95 DEG C Download PDFInfo
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- CN105086327A CN105086327A CN201510533148.6A CN201510533148A CN105086327A CN 105086327 A CN105086327 A CN 105086327A CN 201510533148 A CN201510533148 A CN 201510533148A CN 105086327 A CN105086327 A CN 105086327A
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Abstract
The invention discloses a manufacturing technology of a shielded cable capable of working for a long time at the temperature of 95 DEG C. The manufacturing technology comprises the following steps of selecting a composition A and a composition B; uniformly stirring the composition A and the composition B according to a mass ratio of 1:2.5; extruding under the conditions that the extruding temperature is 170-220 DEG C, a screw speed is 200-400 rpm, and pressure of a vacuum pump is 0.08-0.1MPa during devolatilization; cooling down a cable core, cooling down air at first, cooling down an insulating layer to the temperature of 35-40 DEG C at the cooling speed of 2-4 DEG C per second, and then slowly cooling down the cable core to room temperature; spraying a coating layer on the surface of the cooled cable core; and drying the coating layer to obtain the shielded cable. By the manufacturing technology of the shielded cable capable of working for a long time at the temperature of 95 DEG C, the shielded cable is good in bending flexibility, high in flame retardancy and easy to manufacture, is high-temperature-resistant, is convenient to pave, mount and manage, has excellent electrical property when used, and is long in service life.
Description
Technical field
The present invention relates to the process for processing technical field of fire resistant shielding cable, particularly a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation.
Background technology
Along with developing rapidly of economy, electric wire is at industry-by-industry, all be widely used in field, along with the frequent generation of electrical fire accident, the fire-retardant problem of electric wire causes the attention of countries in the world gradually, a large amount of smog and poisonous is discharged during cable fire, corrosive gas is Hazard Factor in fire, hamper safe escape and the fire-fighting work of people in a fire, lives and properties are made to suffer heavy losses, simultaneously along with communication career, the development of automotive industry and computer industry, particularly wire peculiar to vessel, line for cars, high temperature instrument cable, many occasions such as oil drilling platform cable, certain fire resistant shielded cable material is also absolutely necessary.
The smoothness of semi-conductive shielding material, shielding material and the cohesiveness of insulating material and the migration of impurity have much relations to cable work-ing life and stability; But the research and development situation of internal power cable PP Pipe Compound is also pessimistic, the basic all imports of high-tension cable materials, seriously constrain applying of high voltage power cable; Therefore the localization process realizing semi-conductive screen CABLE MATERIALS must be accelerated; The main raw material of halogen-free cable material has polyolefins, ethylene-propylene rubber(EPR), ethylene-vinyl acetate copolymer and crosslinked polyethylene plastic etc. usually, and these materials all have good anti-radiation performance, chemical resistance etc.
Recently, the cable of matrix material more and more receives the concern of people, and a purposes of compound cable is as the enhancing mechanism in the bare cable line for transmission of electricity on the ground; Although the naked transmission of electricity cable comprising aluminum matrix composite wire is known, for some application, there is the lasting requirement for obtaining the cable character improved; A kind of bending flexibility of exploitation is good, good flame resistance, high temperature resistant, low temperature resistant, and making simple flexible compound cable is the problem that art technology worker needs solution badly.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provide a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation.
In order to solve above technical problem, the invention provides a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation, choose composition A and composition B, mass ratio 1:2.5, according to the mass fraction, composition A comprises:
Low Density Polyethylene 3-4 part, ethylene-vinyl acetate copolymer 3-4 part, carbon black 2.5-2.8 part, properties-correcting agent 0.6-1.0 part, chloroprene rubber 13-14 part, methyl vinyl silicone rubber 15-25 part, methyl vinyl silicone rubber 3-4 part, maleic anhydride grafted ethene-acetate copolymer 13-14 part;
Select LDPE feed back that melt flow rate (MFR) (MFR) is less and the less and EVA that VA content is moderate of MFR, guarantee that it has the performances such as good tensile strength, elongation at break, flexing performance and resisting environmental stress and cracking, simultaneously, conservation rate is stretched out in stretching strength retentivity after aging and fracture, impacts embrittlement temperature and can obtain excellent performance simultaneously;
According to the mass fraction, composition B comprises:
Maleic anhydride graft PE40-60 part, styrene series elastomer 20-30 part, poly-4-methyl-1-pentene 0.3-0.5 part, anti-aging agent 2-4 part, vinegar 5-10 part in poly-caproic acid, dicumyl peroxide 2-3 part, paraffin 1-3 part, zinc borate 5-8 part, calcium stearate 1-3 part, semi-reinforcing hydrocarbon black 1-3 part, attapulgite modified 30-50 part, N, N '-penylene bismaleimides 1-3 part, phenyl triethoxysilane 1.5-2.5 part, Zinic stearas 1-3 part, two octadecanol ester 1-3 part, magnesium hydroxide 15-20 part;
The preparation process of composition A is:
A: the carbon black of drying and properties-correcting agent are mixed at 80-85 DEG C;
B: add and reclaim Low Density Polyethylene, ethylene-vinyl acetate copolymer, chloroprene rubber, methyl vinyl silicone rubber, methyl vinyl silicone rubber, maleic anhydride grafted ethene-acetate copolymer and carbon black and properties-correcting agent and stir, extrude, in extrusion, extrusion temperature is 150-240 DEG C; Screw speed 200-400rpm, vacuum pump pressure during devolatilization is 0.08-0.1MPa;
Attapulgite modified preparation method be by attapulgite scaling loss 2-3 hour at temperature 400-500 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 3-5% even, dry and get final product;
The preparation process of shielding cable is:
stirred according to mass ratio 1:2.5 by composition A and composition B, extrude, in extrusion, extrusion temperature is 170 DEG C-220 DEG C, screw speed 200-400rpm, and vacuum pump pressure during devolatilization is 0.08-0.1MPa;
by step
cable core cools, and first to carrying out air cooling, with the speed of cooling of 2-4 per second DEG C, insulation layer being cooled to 35-40 DEG C, and then progressively cooling to room temperature;
cable core after the cooling period sprays one deck coat on the surface, namely obtain after coating drying to be coated, coat comprises according to mass fraction meter: polyphenylene oxide resin 40-45 part, polyolefin elastomer 20-25 part, packing type fire retardant 10-16 part, synergistic flame retardant 12-18 part, toughner 8-15 part, oxidation inhibitor 0.1-0.5 part, compound rare-earth 0.5-0.8 part;
Compound rare-earth also containing weight fraction meter 0.5-0.8 part in coat, metallic atomic radius due to above rare earth element is large and rare earth has higher activity, be easy to the space filling up storeroom, simultaneously, the compound that rare earth element is easy and the element compounds such as oxygen, sulphur generation fusing point is high, compound rare-earth be added in the dispersiveness and consistency that improve to a certain extent and prepare coat material, make the mixing of materials of coat evenly also improve the flame retardant resistance of coat material;
Compound rare-earth comprises following composition by weight percentage: La:30-33%, Y:18-20%, Sc:16-18%, Gd:9-11%, Sm:8-10%, Pr:13-15%, and above each component sum is 100%;
Properties-correcting agent is lubricant, coupling agent and oily substance; The mixture that packing type fire retardant is aluminium hydroxide and Magnesium Hydroxide Inorganic Flame Retardant, the particle diameter of packing type fire retardant is 2-4 μm; Synergistic flame retardant is polynite, diatomite, nanoclay or its mixture, and the particle diameter of synergistic flame retardant is 5-7 μm; Toughner is the one in polymeric amide, poly-nonane diacid acid anhydride or urethane; Oxidation inhibitor is that compound antioxidant selects polynary hindered phenol type antioxidant and phosphite ester kind antioxidant according to polynary hindered phenol type antioxidant.
Add polyolefin elastomer in coat of the present invention, form microcapsule structure with the coated fire retardant of elastomerics, dispersed with make in polyphenylene oxide resin, improve the avidity of two-phase, decrease the stress concentration at interface, thus improve the over-all properties of system;
Meanwhile, form microcapsule structure with the coated fire retardant of elastomerics, fire retardant is reached in fire-retardant and the most effectively combines, compared to the insulation resistance adding the system of greatly reducing and the elongation at break of fire retardant in the past; Packing type fire retardant and synergistic flame retardant is adopted to combine in the present invention, when coat material mixes, packing type fire retardant and synergistic flame retardant are mixed together and packing type fire retardant is mixed itself, are connected closely, simultaneously, other material is mixed with fire retardant, be connected tightr, considerably improve the processing fluidity of product, intensity, balance between heat impedance and flame retardant resistance, flame retardant effect significantly improves.
The technical scheme that the present invention limits further is:
Further, aforesaid can at 95 DEG C the manufacturing process of the shielding cable of long term operation, the particle diameter of carbon black is 20-30nm, specific surface area 1000-1100m2/g.
Aforesaid can at 95 DEG C the manufacturing process of the shielding cable of long term operation, the melt flow rate (MFR) at ethylene-vinyl acetate copolymer 190 DEG C is 3.0-4.0g/10min, and the mass content of vinyl acetate is 15%-20%.
Aforesaid can at 95 DEG C the manufacturing process of the shielding cable of long term operation, attapulgite modified preparation method is by attapulgite scaling loss 2-3 hour at temperature 400-500 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 3-5% even, dry and get final product.
Embodiment
embodiment 1
The present embodiment provide a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation, choose composition A and composition B, mass ratio 1:2.5, according to the mass fraction, composition A comprises:
Low Density Polyethylene 3 parts, ethylene-vinyl acetate copolymer 4 parts, carbon black 2.5 parts, properties-correcting agent 1.0 parts, chloroprene rubber 13 parts, methyl vinyl silicone rubber 25 parts, methyl vinyl silicone rubber 3 parts, maleic anhydride grafted ethene-acetate copolymer 14 parts; The particle diameter of carbon black is 20-30nm, specific surface area 1000-1100m2/g;
According to the mass fraction, composition B comprises:
Maleic anhydride graft PE40 part, styrene series elastomer 30 parts, poly-4-methyl-1-pentene 0.3 part, 4 parts, anti-aging agent, vinegar 5 parts in poly-caproic acid, dicumyl peroxide 3 parts, 1 part, paraffin, zinc borate 8 parts, calcium stearate 1 part, semi-reinforcing hydrocarbon black 3 parts, attapulgite modified 30 parts, N, N '-penylene bismaleimides 3 parts, phenyl triethoxysilane 1.5 parts, Zinic stearas 3 parts, two octadecanol ester 1 part, magnesium hydroxide 20 parts;
The preparation process of composition A is:
A: the carbon black of drying and properties-correcting agent are mixed at 82 DEG C;
B: add and reclaim Low Density Polyethylene, ethylene-vinyl acetate copolymer, chloroprene rubber, methyl vinyl silicone rubber, methyl vinyl silicone rubber, maleic anhydride grafted ethene-acetate copolymer and carbon black and properties-correcting agent and stir, extrude, in extrusion, extrusion temperature is 165 DEG C; Screw speed 360rpm, vacuum pump pressure during devolatilization is 0.09MPa;
Attapulgite modified preparation method be by attapulgite scaling loss 2 hours at temperature 430 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 3-5% even, dry and get final product;
The preparation process of shielding cable is:
stirred according to mass ratio 1:2.5 by composition A and composition B, extrude, in extrusion, extrusion temperature is 185 DEG C, screw speed 365rpm, and vacuum pump pressure during devolatilization is 0.08MPa;
by step
cable core cools, and first to carrying out air cooling, with the speed of cooling of 2 DEG C per second, insulation layer being cooled to 40 DEG C, and then progressively cooling to room temperature;
cable core after the cooling period sprays one deck coat on the surface, namely obtain after coating drying to be coated, coat comprises according to mass fraction meter: polyphenylene oxide resin 41 parts, polyolefin elastomer 22 parts, packing type fire retardant 12 parts, synergistic flame retardant 14 parts, toughner 13 parts, 0.3 part, oxidation inhibitor, compound rare-earth 0.6 part;
Compound rare-earth comprises following composition by weight percentage: La:33%, Y:18%, Sc:16%, Gd:9%, Sm:9%, Pr:15%;
Properties-correcting agent is lubricant, coupling agent and oily substance; The mixture that packing type fire retardant is aluminium hydroxide and Magnesium Hydroxide Inorganic Flame Retardant, the particle diameter of packing type fire retardant is 2-4 μm; Synergistic flame retardant is polynite, diatomaceous mixture, and the particle diameter of synergistic flame retardant is 5-7 μm; Toughner is polymeric amide; Oxidation inhibitor is that compound antioxidant selects polynary hindered phenol type antioxidant and phosphite ester kind antioxidant according to polynary hindered phenol type antioxidant.
embodiment 2
The present embodiment provide a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation, choose composition A and composition B, mass ratio 1:2.5, according to the mass fraction, composition A comprises:
Low Density Polyethylene 4 parts, ethylene-vinyl acetate copolymer 3 parts, carbon black 2.8 parts, properties-correcting agent 0.6 part, chloroprene rubber 14 parts, methyl vinyl silicone rubber 15 parts, methyl vinyl silicone rubber 4 parts, maleic anhydride grafted ethene-acetate copolymer 13 parts; The particle diameter of carbon black is 20-30nm, specific surface area 1000-1100m2/g, and the melt flow rate (MFR) at ethylene-vinyl acetate copolymer 190 DEG C is 3.0-4.0g/10min, and the mass content of vinyl acetate is 15%-20%;
According to the mass fraction, composition B comprises:
Maleic anhydride graft PE60 part, styrene series elastomer 20 parts, poly-4-methyl-1-pentene 0.5 part, 2 parts, anti-aging agent, vinegar 10 parts in poly-caproic acid, dicumyl peroxide 2 parts, 3 parts, paraffin, zinc borate 5 parts, calcium stearate 3 parts, semi-reinforcing hydrocarbon black 1 part, attapulgite modified 50 parts, N, N '-penylene bismaleimides 1 part, phenyl triethoxysilane 2.5 parts, Zinic stearas 1 part, two octadecanol ester 3 parts, magnesium hydroxide 15 parts;
The preparation process of composition A is:
A: the carbon black of drying and properties-correcting agent are mixed at 85 DEG C;
B: add and reclaim Low Density Polyethylene, ethylene-vinyl acetate copolymer, chloroprene rubber, methyl vinyl silicone rubber, methyl vinyl silicone rubber, maleic anhydride grafted ethene-acetate copolymer and carbon black and properties-correcting agent and stir, extrude, in extrusion, extrusion temperature is 150 DEG C; Screw speed 400rpm, vacuum pump pressure during devolatilization is 0.08MPa;
Attapulgite modified preparation method be by attapulgite scaling loss 2 hours at temperature 500 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 5% even, dry and get final product;
The preparation process of shielding cable is:
stirred according to mass ratio 1:2.5 by composition A and composition B, extrude, in extrusion, extrusion temperature is 170 DEG C DEG C, screw speed 400rpm, and vacuum pump pressure during devolatilization is 0.08MPa;
by step
cable core cools, and first to carrying out air cooling, with the speed of cooling of 4 DEG C per second, insulation layer being cooled to 35 DEG C, and then progressively cooling to room temperature;
cable core after the cooling period sprays one deck coat on the surface, namely obtain after coating drying to be coated, coat comprises according to mass fraction meter: polyphenylene oxide resin 45 parts, polyolefin elastomer 20 parts, packing type fire retardant 16 parts, synergistic flame retardant 12 parts, toughner 15 parts, 0.1 part, oxidation inhibitor, compound rare-earth 0.8 part;
Compound rare-earth comprises following composition by weight percentage: La:30%, Y:20%, Sc:18%, Gd:11%, Sm:8%, Pr:13%;
Properties-correcting agent is lubricant, coupling agent and oily substance; The mixture that packing type fire retardant is aluminium hydroxide and Magnesium Hydroxide Inorganic Flame Retardant, the particle diameter of packing type fire retardant is 2-4 μm; Synergistic flame retardant is the mixture of diatomite, nanoclay, and the particle diameter of synergistic flame retardant is 5-7 μm; Toughner is poly-nonane diacid acid anhydride; Oxidation inhibitor is that compound antioxidant selects polynary hindered phenol type antioxidant and phosphite ester kind antioxidant according to polynary hindered phenol type antioxidant.
embodiment 3
The present embodiment provide a kind of can at 95 DEG C the manufacturing process of the shielding cable of long term operation, choose composition A and composition B, mass ratio 1:2.5, according to the mass fraction, composition A comprises:
Low Density Polyethylene 3 parts, ethylene-vinyl acetate copolymer 4 parts, carbon black 2.6 parts, properties-correcting agent 0.85 part, chloroprene rubber 13 parts, methyl vinyl silicone rubber 21 parts, methyl vinyl silicone rubber 3 parts, maleic anhydride grafted ethene-acetate copolymer 13 parts; The particle diameter of carbon black is 28nm, specific surface area 1050m2/g, and the melt flow rate (MFR) at ethylene-vinyl acetate copolymer 190 DEG C is 3.6g/10min, and the mass content of vinyl acetate is 17%;
According to the mass fraction, composition B comprises:
Maleic anhydride graft PE56 part, styrene series elastomer 26 parts, poly-4-methyl-1-pentene 0.35 part, 2.8 parts, anti-aging agent, vinegar 7 parts in poly-caproic acid, dicumyl peroxide 2.5 parts, 2 parts, paraffin, zinc borate 6 parts, calcium stearate 2 parts, semi-reinforcing hydrocarbon black 2 parts, attapulgite modified 43 parts, N, N '-penylene bismaleimides 2 parts, phenyl triethoxysilane 1.7 parts, Zinic stearas 2 parts, two octadecanol ester 2 parts, magnesium hydroxide 17 parts; Attapulgite modified preparation method is by attapulgite scaling loss 2.5 hours at temperature 485 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 4% even, dry and get final product;
The preparation process of composition A is:
A: the carbon black of drying and properties-correcting agent are mixed at 81 DEG C;
B: add and reclaim Low Density Polyethylene, ethylene-vinyl acetate copolymer, chloroprene rubber, methyl vinyl silicone rubber, methyl vinyl silicone rubber, maleic anhydride grafted ethene-acetate copolymer and carbon black and properties-correcting agent and stir, extrude, in extrusion, extrusion temperature is 235 DEG C; Screw speed 365rpm, vacuum pump pressure during devolatilization is 0.08-0.1MPa;
Attapulgite modified preparation method be by attapulgite scaling loss 2.5 hours at temperature 465 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 4% even, dry and get final product;
The preparation process of shielding cable is:
stirred according to mass ratio 1:2.5 by composition A and composition B, extrude, in extrusion, extrusion temperature is 195 DEG C, screw speed 365rpm, and vacuum pump pressure during devolatilization is 0.095MPa;
by step
cable core cools, and first to carrying out air cooling, with the speed of cooling of 3 DEG C per second, insulation layer being cooled to 39 DEG C, and then progressively cooling to room temperature;
cable core after the cooling period sprays one deck coat on the surface, namely obtain after coating drying to be coated, coat comprises according to mass fraction meter: polyphenylene oxide resin 43 parts, polyolefin elastomer 24 parts, packing type fire retardant 11 parts, synergistic flame retardant 16 parts, toughner 13 parts, 0.35 part, oxidation inhibitor, compound rare-earth 0.65 part;
Compound rare-earth comprises following composition by weight percentage: La:32%, Y:18%, Sc:17%, Gd:10%, Sm:9%, Pr:14%;
Properties-correcting agent is lubricant, coupling agent and oily substance; The mixture that packing type fire retardant is aluminium hydroxide and Magnesium Hydroxide Inorganic Flame Retardant, the particle diameter of packing type fire retardant is 2-4 μm; Synergistic flame retardant is the mixture of polynite, diatomite, nanoclay, and the particle diameter of synergistic flame retardant is 5-7 μm; Toughner is urethane; Oxidation inhibitor is that compound antioxidant selects polynary hindered phenol type antioxidant and phosphite ester kind antioxidant according to polynary hindered phenol type antioxidant.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (4)
1. can at 95 DEG C the manufacturing process of the shielding cable of long term operation, it is characterized in that, choose composition A and composition B, mass ratio 1:2.5, according to the mass fraction, composition A comprises:
Low Density Polyethylene 3-4 part, ethylene-vinyl acetate copolymer 3-4 part, carbon black 2.5-2.8 part, properties-correcting agent 0.6-1.0 part, chloroprene rubber 13-14 part, methyl vinyl silicone rubber 15-25 part, methyl vinyl silicone rubber 3-4 part, maleic anhydride grafted ethene-acetate copolymer 13-14 part;
According to the mass fraction, composition B comprises:
Maleic anhydride graft PE40-60 part, styrene series elastomer 20-30 part, poly-4-methyl-1-pentene 0.3-0.5 part, anti-aging agent 2-4 part, vinegar 5-10 part in poly-caproic acid, dicumyl peroxide 2-3 part, paraffin 1-3 part, zinc borate 5-8 part, calcium stearate 1-3 part, semi-reinforcing hydrocarbon black 1-3 part, attapulgite modified 30-50 part, N, N '-penylene bismaleimides 1-3 part, phenyl triethoxysilane 1.5-2.5 part, Zinic stearas 1-3 part, two octadecanol ester 1-3 part, magnesium hydroxide 15-20 part;
The preparation process of described composition A is:
A: the carbon black of drying and properties-correcting agent are mixed at 80-85 DEG C;
B: add and reclaim Low Density Polyethylene, ethylene-vinyl acetate copolymer, chloroprene rubber, methyl vinyl silicone rubber, methyl vinyl silicone rubber, maleic anhydride grafted ethene-acetate copolymer and carbon black and properties-correcting agent and stir, extrude, in extrusion, extrusion temperature is 150-240 DEG C; Screw speed 200-400rpm, vacuum pump pressure during devolatilization is 0.08-0.1MPa;
Described attapulgite modified preparation method is by attapulgite scaling loss 2-3 hour at temperature 400-500 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 3-5% even, dry and get final product;
The preparation process of described shielding cable is:
stirred according to mass ratio 1:2.5 by composition A and composition B, extrude, in extrusion, extrusion temperature is 170 DEG C-220 DEG C, screw speed 200-400rpm, and vacuum pump pressure during devolatilization is 0.08-0.1MPa;
by step
cable core cools, and first to carrying out air cooling, with the speed of cooling of 2-4 per second DEG C, insulation layer being cooled to 35-40 DEG C, and then progressively cooling to room temperature;
cable core after the cooling period sprays one deck coat on the surface, namely obtain after coating drying to be coated, described coat comprises according to mass fraction meter: polyphenylene oxide resin 40-45 part, polyolefin elastomer 20-25 part, packing type fire retardant 10-16 part, synergistic flame retardant 12-18 part, toughner 8-15 part, oxidation inhibitor 0.1-0.5 part, compound rare-earth 0.5-0.8 part;
Described compound rare-earth comprises following composition by weight percentage: La:30-33%, Y:18-20%, Sc:16-18%, Gd:9-11%, Sm:8-10%, Pr:13-15%, and above each component sum is 100%;
Described properties-correcting agent is lubricant, coupling agent and oily substance; The mixture that described packing type fire retardant is aluminium hydroxide and Magnesium Hydroxide Inorganic Flame Retardant, the particle diameter of packing type fire retardant is 2-4 μm; Described synergistic flame retardant is polynite, diatomite, nanoclay or its mixture, and the particle diameter of synergistic flame retardant is 5-7 μm; Described toughner is the one in polymeric amide, poly-nonane diacid acid anhydride or urethane; Described oxidation inhibitor is for selecting polynary hindered phenol type antioxidant and phosphite ester kind antioxidant according to polynary hindered phenol type antioxidant for compound antioxidant.
2. according to claim 1 can at 95 DEG C the manufacturing process of the shielding cable of long term operation, it is characterized in that, the particle diameter of described carbon black is 20-30nm, specific surface area 1000-1100m2/g.
3. according to claim 1 can at 95 DEG C the manufacturing process of the shielding cable of long term operation, it is characterized in that, melt flow rate (MFR) at described ethylene-vinyl acetate copolymer 190 DEG C is 3.0-4.0g/10min, and the mass content of vinyl acetate is 15%-20%.
4. according to claim 1 can at 95 DEG C the manufacturing process of the shielding cable of long term operation, it is characterized in that, described attapulgite modified preparation method is by attapulgite scaling loss 2-3 hour at temperature 400-500 DEG C, after grind to form attapulgite powder, admix the Di(dioctylpyrophosphato) ethylene titanate agitating being equivalent to powder weight 3-5% even, dry and get final product.
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| CN105670067A (en) * | 2016-02-03 | 2016-06-15 | 安徽南洋电缆有限公司 | Preparation method of insulating material for high-voltage direct current insulated cable |
| CN106019092A (en) * | 2016-05-13 | 2016-10-12 | 江苏麟派电力科技有限公司 | Comprehensive online monitoring device for distribution transformer |
| CN107501955A (en) * | 2017-08-30 | 2017-12-22 | 上海贝思特管业有限公司 | A kind of preparation method of communication micro-pipe |
| CN110684356A (en) * | 2019-10-21 | 2020-01-14 | 厦门登宏电子科技有限公司 | Antistatic dust-absorbing silicone rubber product and manufacturing method thereof |
| JPWO2019131593A1 (en) * | 2017-12-26 | 2020-12-10 | 恭一 和田 | Method for manufacturing high-strength heat-resistant rubber composition and high-strength heat-resistant rubber product |
| CN112795077A (en) * | 2021-01-22 | 2021-05-14 | 廊坊铭兴新材料科技有限公司 | Low-smoke halogen-free cable material containing rare earth synergistic flame retardant and preparation thereof |
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Application publication date: 20151125 |