CN112820466A - Crosslinked polyethylene insulation halogen-free low-smoke flame-retardant power cable - Google Patents
Crosslinked polyethylene insulation halogen-free low-smoke flame-retardant power cable Download PDFInfo
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- CN112820466A CN112820466A CN202011603329.9A CN202011603329A CN112820466A CN 112820466 A CN112820466 A CN 112820466A CN 202011603329 A CN202011603329 A CN 202011603329A CN 112820466 A CN112820466 A CN 112820466A
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 239000003063 flame retardant Substances 0.000 title claims abstract description 96
- 239000000779 smoke Substances 0.000 title claims abstract description 68
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 38
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 38
- 238000009413 insulation Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 108
- 239000004020 conductor Substances 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000011049 filling Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims description 48
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 35
- 239000003963 antioxidant agent Substances 0.000 claims description 35
- 230000003078 antioxidant effect Effects 0.000 claims description 35
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 26
- 238000001125 extrusion Methods 0.000 claims description 20
- -1 phenylbutyl Chemical group 0.000 claims description 20
- 229920000098 polyolefin Polymers 0.000 claims description 20
- 238000004132 cross linking Methods 0.000 claims description 18
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 15
- 239000000314 lubricant Substances 0.000 claims description 15
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 15
- 239000000347 magnesium hydroxide Substances 0.000 claims description 15
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 15
- 238000005469 granulation Methods 0.000 claims description 13
- 230000003179 granulation Effects 0.000 claims description 13
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 11
- 150000004692 metal hydroxides Chemical group 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000005995 Aluminium silicate Substances 0.000 claims description 10
- 235000012211 aluminium silicate Nutrition 0.000 claims description 10
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 claims description 10
- 239000006229 carbon black Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000004927 clay Substances 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 229920001903 high density polyethylene Polymers 0.000 claims description 10
- 239000004700 high-density polyethylene Substances 0.000 claims description 10
- 239000003999 initiator Substances 0.000 claims description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 10
- 229920001684 low density polyethylene Polymers 0.000 claims description 10
- 239000004702 low-density polyethylene Substances 0.000 claims description 10
- 229920005672 polyolefin resin Polymers 0.000 claims description 10
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 6
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 5
- 239000008397 galvanized steel Substances 0.000 claims description 5
- 239000011490 mineral wool Substances 0.000 claims description 5
- 239000002105 nanoparticle Substances 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 150000008039 phosphoramides Chemical class 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 229910052736 halogen Inorganic materials 0.000 abstract description 3
- 150000002367 halogens Chemical class 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/003—Apparatus or processes specially adapted for manufacturing conductors or cables using irradiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable which comprises a conductor, an insulating layer, a filling layer, a belting layer, a steel-belt armor layer, an inner sheath layer and an outer sheath layer, wherein the insulating layer is arranged on the conductor; the cable comprises an outer sheath layer, conductors, an insulating layer, a steel strip armor layer, an inner sheath layer and a filling layer, wherein the outer sheath layer is internally provided with a belting layer, the conductors are positioned in the belting layer and are provided with a plurality of conductors, the insulating layer is wrapped on the surface of the conductors, the inner layer surface of the outer sheath layer is wrapped with the steel strip armor layer, the inner sheath layer is arranged between the steel strip armor layer and the belting layer, and the filling layer is; the halogen-free low-smoke flame-retardant belt material contained in the cable does not contain halogen, harmful gas and corrosive gas are not generated during combustion, and the smoke quantity is small during combustion; when the cable is broken or buried, the cable can not separate out heavy metals such as lead and the like, and the harm to soil and human bodies is avoided.
Description
Technical Field
The invention belongs to the technical field of cables, and particularly relates to a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable.
Background
With the development of modern science and technology and the improvement of living standard of people, energy and information are indispensable resources, and no matter the transmission of electric energy or information, the electric wire and the electric wire can not be separated, and the electric wire are also one of important ways for spreading fire. According to incomplete statistics, the fire disaster accounts for about 35% of the fire disaster caused by the electric wires and the electric cables, and about one third of the dead people are suffocated and die due to the inhalation of toxic gas released when the electric wires and the electric cables are burnt. Thus, the prevention of the combustion of the electric wire and cable and the prevention of the release of noxious and harmful corrosive gases and heavy smoke have been problems that must be faced by the electric wire and cable industry.
As is well known, a common polyvinyl chloride insulated wire and cable has excellent mechanical, electrical and processing properties, but is flammable (although having a certain flame retardant property), high in heat generation, and fast in flame propagation speed, and most importantly, a large amount of toxic and harmful corrosive gases (such as hydrogen chloride, dioxin and the like) and dense smoke are released during combustion, so that people die and equipment are damaged.
Disclosure of Invention
The invention aims to provide a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable.
The purpose of the invention can be realized by the following technical scheme:
a cross-linked polyethylene insulation halogen-free low-smoke flame-retardant power cable comprises a conductor, an insulation layer, a filling layer, a belting layer, a steel belt armor layer, an inner sheath layer and an outer sheath layer;
the cable comprises an outer sheath layer, conductors, an insulating layer, a steel strip armor layer, an inner sheath layer and a filling layer, wherein the outer sheath layer is internally provided with a belting layer, the conductors are positioned in the belting layer and are provided with a plurality of conductors, the insulating layer is wrapped on the surface of the conductors, the inner layer surface of the outer sheath layer is wrapped with the steel strip armor layer, the inner sheath layer is arranged between the steel strip armor layer and the belting layer, and the filling layer is;
the insulating layer is made of a cross-linked polyethylene material, and the cross-linked polyethylene material is composed of the following raw materials in parts by weight: 20-40 parts of low-density polyethylene, 20-45 parts of flame retardant, 10-25 parts of high-density polyethylene resin, 2-4 parts of carbon black, 0.6-1.2 parts of antioxidant, 10-20 parts of silane coupling agent, 0.4-0.8 part of initiator, 1.2-1.6 parts of cross-linking agent, 0.9-1.3 parts of catalyst and 0.7-1.1 parts of phenylbutyl resin;
the preparation method of the insulating layer comprises the following steps:
(1) uniformly mixing low-density polyethylene and high-density polyethylene resin, feeding the mixture into a feeding and drying device through a vacuum-pumping pipeline, drying the mixture at the temperature of between 50 and 60 ℃, and discharging the mixture to obtain base material resin;
(2) adding the dried base material resin and the antioxidant into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-1200r/min, and the stirring and mixing time is 8-10 min;
(3) adding the initiator, the flame retardant, the silane coupling agent and the carbon black into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-;
(4) adding the mixed material into a hopper of a double-screw extruder for extrusion granulation, wherein the temperature of the extruder is 190-;
(5) adding the cross-linking agent, the catalyst and the butylbenzene resin into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-;
(6) then putting the material A and the material B into an internal mixer, taking out the materials until the current of the internal mixer tends to be in a stable state, and then carrying out melt extrusion to prepare a crosslinked polyethylene layer;
the outer sheath layer and the inner sheath layer are both made of halogen-free low-smoke flame-retardant polyolefin materials, and the halogen-free low-smoke flame-retardant polyolefin materials are composed of the following raw materials in parts by weight: 25-60 parts of polyolefin resin, 35-80 parts of polymer graft, 35-75 parts of aluminum hydroxide, 25-45 parts of magnesium hydroxide, 1.2-3 parts of nano particles, 0.8-2.8 parts of coupling agent, 0.7-2.5 parts of coupling assistant agent, 0.25-0.8 part of antioxidant, 0.8-1.5 parts of lubricant, 0.8-2.4 parts of flame retardant and 1.8-5.5 parts of crosslinking sensitizer;
the preparation method of the halogen-free low-smoke flame-retardant polyolefin material comprises the following steps: adding polyolefin resin, a high-molecular graft, an antioxidant, a lubricant, a flame retardant and a crosslinking sensitizer into an internal mixer, carrying out low-speed internal mixing for 3-6min, adding aluminum hydroxide, magnesium hydroxide, a coupling agent and an auxiliary coupling agent when the temperature is raised to 85-110 ℃, carrying out continuous internal mixing for 15-25min at the temperature of 120-140 ℃ to obtain an internal mixed mixture, adding the internal mixed mixture into a double-screw extruder for mixing, wherein the extrusion temperature of the double-screw extruder is 125-155 ℃; and finally, feeding the mixed material of the double screws into a single-screw extruder for extrusion, bracing, cooling and granulation to obtain the low-smoke halogen-free flame-retardant polyolefin material.
As a further scheme of the invention: the steel strip armor layer is made of a galvanized steel strip material, the filling layer is made of a flame-retardant rock wool rope material, and the wrapping tape layer is made of a halogen-free low-smoke flame-retardant tape material.
As a further scheme of the invention: the halogen-free low-smoke flame-retardant belt material comprises the following raw materials in parts by weight: 10-30 parts of diphenylmethane diisocyanate, 25-45 parts of phosphoramide compounds, 10-25 parts of silane coupling agents, 15-35 parts of soft kaolin and 6-20 parts of hard clay.
As a further scheme of the invention: the preparation method of the halogen-free low-smoke flame-retardant belt material comprises the steps of placing diphenylmethane diisocyanate, a phosphoramide compound and a silane coupling agent in a high-speed mixer at 90-120 ℃ for uniform mixing, then adding soft kaolin and hard clay for uniform mixing, then feeding the mixture into a screw extruder for melt mixing, extruding and granulating, and finally performing compression molding by a casting machine to obtain the halogen-free low-smoke flame-retardant belt material.
As a further scheme of the invention: the flame retardant adopts metal hydroxide, and the metal hydroxide is aluminum hydroxide and magnesium hydroxide.
As a further scheme of the invention: the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 300 and antioxidant 412 s.
As a further scheme of the invention: the crosslinking sensitizer is one or two of triallyl isocyanurate and trimethylolpropane trimethacrylate.
As a further scheme of the invention: the silane coupling agent is silane coupling agent A-172 or silane coupling agent Si-69.
As a further scheme of the invention: the lubricant is one or more of polyethylene wax, stearic acids, ACR and ethylene-vinyl acetate copolymer.
The invention has the beneficial effects that:
(1) the prepared halogen-free low-smoke flame-retardant cable does not contain halogen, does not generate harmful gas and corrosive gas during combustion, and has less smoke generation during combustion; when the cable is broken or buried, the cable can not separate out heavy metals such as lead and the like, and the harm to soil and human bodies is avoided.
(2) The metal hydroxide is used as a flame retardant, when the cable is burnt, the metal oxide is heated and decomposed to release crystal water and absorb a large amount of heat, the temperature rise of the polymer is inhibited, the concentration of combustible gas and oxygen is diluted, and the combustion reaction is prevented from continuing; aluminum oxide [ Al ] generated by additional decomposition2O3]And magnesium oxide [ MgO]The surface of the combustible is formed with a heat insulation layer to prevent the polymer from contacting with oxygen, thereby playing a role of flame retardance.
(3) The crosslinking mode of the crosslinked polyethylene material is irradiation crosslinking, high-energy electron beam generated by an electron accelerator is utilized to bombard an insulating layer, a high-molecular chain is broken, broken free radicals are unstable and need to be recombined mutually, and the combined high molecules are changed into a three-dimensional reticular molecular structure from an original chain molecular structure to form crosslinking.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable of the invention.
In the figure: 1. a conductor; 2. an insulating layer; 3. a filling layer; 4. a belting layer; 5. a steel tape armor layer; 6. an inner jacket layer; 7. an outer jacket layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable includes a conductor 1, an insulating layer 2, a filling layer 3, a belting layer 4, a steel-tape armor layer 5, an inner sheath layer 6 and an outer sheath layer 7;
a belting layer 4 is arranged in the outer sheath layer 7, the conductors 1 are positioned in the belting layer 4 and are provided with a plurality of conductors, the insulating layer 2 is wrapped on the surface of the conductors 1, the inner layer surface of the outer sheath layer 7 is wrapped with a steel belt armor layer 5, an inner sheath layer 6 is arranged between the steel belt armor layer 5 and the belting layer 4, and a gap between the insulating layer 2 and the belting layer 4 is filled with a filling layer 3;
the insulating layer 2 is made of a cross-linked polyethylene material, and the cross-linked polyethylene material is composed of the following raw materials in parts by weight: 20 parts of low-density polyethylene, 20 parts of flame retardant, 10 parts of high-density polyethylene resin, 2 parts of carbon black, 0.6 part of antioxidant, 10 parts of silane coupling agent, 0.4 part of initiator, 1.2 parts of cross-linking agent, 0.9 part of catalyst and 0.7 part of phenylbutylene resin;
the preparation method of the insulating layer 2 comprises the following steps:
(1) uniformly mixing low-density polyethylene and high-density polyethylene resin, feeding the mixture into a feeding and drying device through a vacuum-pumping pipeline, drying the mixture at 50 ℃, and discharging the mixture to obtain base material resin;
(2) adding the dried base material resin and the antioxidant into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900r/min, and the stirring and mixing time is 8 min;
(3) adding the initiator, the flame retardant, the silane coupling agent and the carbon black into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900r/min, and the stirring and mixing time is 8min to obtain a mixed material;
(4) adding the mixed material into a hopper of a double-screw extruder for extrusion granulation, wherein the temperature of the extruder is 190 ℃, the rotating speed is 350r/min, and the granulation diameter is 3.8mm to obtain a material A;
(5) adding the cross-linking agent, the catalyst and the butylbenzene resin into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900r/min, and the stirring and mixing time is 8min to obtain a material B;
(6) then putting the material A and the material B into an internal mixer, taking out the materials until the current of the internal mixer tends to be in a stable state, and then carrying out melt extrusion to prepare a crosslinked polyethylene layer;
the outer sheath layer 7 and the inner sheath layer 6 are both made of halogen-free low-smoke flame-retardant polyolefin materials; the halogen-free low-smoke flame-retardant polyolefin material is prepared from the following raw materials in parts by weight: 25 parts of polyolefin resin, 35 parts of high-molecular graft, 35 parts of aluminum hydroxide, 25 parts of magnesium hydroxide, 1.2 parts of nano particles, 0.8 part of coupling agent, 0.7 part of coupling assistant agent, 0.25 part of antioxidant, 0.8 part of lubricant, 0.8 part of flame retardant and 1.8 parts of crosslinking sensitizer;
the preparation method of the halogen-free low-smoke flame-retardant polyolefin material comprises the following steps: adding polyolefin resin, a high-molecular graft, an antioxidant, a lubricant, a flame retardant and a crosslinking sensitizer into an internal mixer, carrying out low-speed internal mixing for 3min, adding aluminum hydroxide, magnesium hydroxide, a coupling agent and an auxiliary coupling agent when the temperature is raised to 85 ℃, carrying out internal mixing for 15min at the temperature of 120 ℃ to obtain an internal mixed mixture, adding the internal mixed mixture into a double-screw extruder for mixing, wherein the extrusion temperature of the double-screw extruder is 125 ℃; and finally, feeding the mixed material of the double screws into a single-screw extruder for extrusion, bracing, cooling and granulation to obtain the low-smoke halogen-free flame-retardant polyolefin material.
As a further scheme of the invention: the steel strip armor layer 5 is made of a galvanized steel strip material, the filling layer 3 is made of a flame-retardant rock wool rope material, and the wrapping tape layer 4 is made of a halogen-free low-smoke flame-retardant tape material.
As a further scheme of the invention: the halogen-free low-smoke flame-retardant belt material comprises the following raw materials in parts by weight: 10 parts of diphenylmethane diisonitrile ester, 25 parts of phosphoramide compound, 10 parts of silane coupling agent, 15 parts of soft kaolin and 6 parts of hard clay.
As a further scheme of the invention: the preparation method of the halogen-free low-smoke flame-retardant belt material comprises the steps of placing diphenylmethane diisocyanate, a phosphoramide compound and a silane coupling agent in a high-speed mixer at 90 ℃ for uniform mixing, then adding soft kaolin and hard clay for uniform mixing, then feeding the materials into a screw extruder for melting and mixing, extruding and granulating, and finally performing compression molding by a casting machine to obtain the halogen-free low-smoke flame-retardant belt material.
As a further scheme of the invention: the flame retardant adopts metal hydroxide, and the metal hydroxide is aluminum hydroxide and magnesium hydroxide.
As a further scheme of the invention: the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 300 and antioxidant 412 s.
As a further scheme of the invention: the crosslinking sensitizer is one or two of triallyl isocyanurate and trimethylolpropane trimethacrylate.
As a further scheme of the invention: the silane coupling agent is silane coupling agent A-172 or silane coupling agent Si-69.
As a further scheme of the invention: the lubricant is one or more of polyethylene wax, stearic acids, ACR and ethylene-vinyl acetate copolymer.
Example 2
Referring to fig. 1, a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable includes a conductor 1, an insulating layer 2, a filling layer 3, a belting layer 4, a steel-tape armor layer 5, an inner sheath layer 6 and an outer sheath layer 7;
a belting layer 4 is arranged in the outer sheath layer 7, the conductors 1 are positioned in the belting layer 4 and are provided with a plurality of conductors, the insulating layer 2 is wrapped on the surface of the conductors 1, the inner layer surface of the outer sheath layer 7 is wrapped with a steel belt armor layer 5, an inner sheath layer 6 is arranged between the steel belt armor layer 5 and the belting layer 4, and a gap between the insulating layer 2 and the belting layer 4 is filled with a filling layer 3;
the insulating layer 2 is made of a cross-linked polyethylene material, and the cross-linked polyethylene material is composed of the following raw materials in parts by weight: 30 parts of low-density polyethylene, 30 parts of flame retardant, 20 parts of high-density polyethylene resin, 3 parts of carbon black, 1 part of antioxidant, 15 parts of silane coupling agent, 0.6 part of initiator, 1.4 parts of cross-linking agent, 1.1 part of catalyst and 0.9 part of phenylbutylene resin;
the preparation method of the insulating layer 2 comprises the following steps:
(1) uniformly mixing low-density polyethylene and high-density polyethylene resin, feeding the mixture into a feeding and drying device through a vacuum-pumping pipeline, drying the mixture at the temperature of 55 ℃, and discharging the mixture to obtain base material resin;
(2) adding the dried base material resin and the antioxidant into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1000r/min, and the stirring and mixing time is 9 min;
(3) adding the initiator, the flame retardant, the silane coupling agent and the carbon black into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1000r/min, and the stirring and mixing time is 9min to obtain a mixed material;
(4) adding the mixed material into a hopper of a double-screw extruder for extrusion granulation, wherein the temperature of the extruder is 195 ℃, the rotating speed is 400r/min, and the granulation diameter is 4.4mm to obtain a material A;
(5) adding the cross-linking agent, the catalyst and the butylbenzene resin into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1000r/min, and the stirring and mixing time is 9min to obtain a material B;
(6) then putting the material A and the material B into an internal mixer, taking out the materials until the current of the internal mixer tends to be in a stable state, and then carrying out melt extrusion to prepare a crosslinked polyethylene layer;
the outer sheath layer 7 and the inner sheath layer 6 are both made of halogen-free low-smoke flame-retardant polyolefin materials; the halogen-free low-smoke flame-retardant polyolefin material is prepared from the following raw materials in parts by weight: 40 parts of polyolefin resin, 60 parts of polymer graft, 55 parts of aluminum hydroxide, 35 parts of magnesium hydroxide, 2 parts of nano particles, 2 parts of coupling agent, 1.5 parts of coupling assistant agent, 0.6 part of antioxidant, 1 part of lubricant, 1.8 parts of flame retardant and 3 parts of crosslinking sensitizer;
the preparation method of the halogen-free low-smoke flame-retardant polyolefin material comprises the following steps: adding polyolefin resin, a high-molecular graft, an antioxidant, a lubricant, a flame retardant and a crosslinking sensitizer into an internal mixer, carrying out low-speed internal mixing for 4min, adding aluminum hydroxide, magnesium hydroxide, a coupling agent and an auxiliary coupling agent when the temperature is raised to 95 ℃, carrying out internal mixing for 20min at the temperature of 130 ℃ to obtain an internal mixing mixture, adding the internal mixing mixture into a double-screw extruder for mixing, wherein the extrusion temperature of the double-screw extruder is 140 ℃; and finally, feeding the mixed material of the double screws into a single-screw extruder for extrusion, bracing, cooling and granulation to obtain the low-smoke halogen-free flame-retardant polyolefin material.
As a further scheme of the invention: the steel strip armor layer 5 is made of a galvanized steel strip material, the filling layer 3 is made of a flame-retardant rock wool rope material, and the wrapping tape layer 4 is made of a halogen-free low-smoke flame-retardant tape material.
As a further scheme of the invention: the halogen-free low-smoke flame-retardant belt material comprises the following raw materials in parts by weight: 20 parts of diphenylmethane diisonitrile ester, 35 parts of phosphoramide compounds, 20 parts of silane coupling agents, 25 parts of soft kaolin and 15 parts of hard clay.
As a further scheme of the invention: the preparation method of the halogen-free low-smoke flame-retardant belt material comprises the steps of placing diphenylmethane diisocyanate, a phosphoramide compound and a silane coupling agent in a high-speed mixer at 100 ℃ for uniform mixing, then adding soft kaolin and hard clay for uniform mixing, then feeding the materials into a screw extruder for melting and mixing, extruding and granulating, and finally performing compression molding by a casting machine to obtain the halogen-free low-smoke flame-retardant belt material.
As a further scheme of the invention: the flame retardant adopts metal hydroxide, and the metal hydroxide is aluminum hydroxide and magnesium hydroxide.
As a further scheme of the invention: the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 300 and antioxidant 412 s.
As a further scheme of the invention: the crosslinking sensitizer is one or two of triallyl isocyanurate and trimethylolpropane trimethacrylate.
As a further scheme of the invention: the silane coupling agent is silane coupling agent A-172 or silane coupling agent Si-69.
As a further scheme of the invention: the lubricant is one or more of polyethylene wax, stearic acids, ACR and ethylene-vinyl acetate copolymer.
Example 3
Referring to fig. 1, a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable includes a conductor 1, an insulating layer 2, a filling layer 3, a belting layer 4, a steel-tape armor layer 5, an inner sheath layer 6 and an outer sheath layer 7;
a belting layer 4 is arranged in the outer sheath layer 7, the conductors 1 are positioned in the belting layer 4 and are provided with a plurality of conductors, the insulating layer 2 is wrapped on the surface of the conductors 1, the inner layer surface of the outer sheath layer 7 is wrapped with a steel belt armor layer 5, an inner sheath layer 6 is arranged between the steel belt armor layer 5 and the belting layer 4, and a gap between the insulating layer 2 and the belting layer 4 is filled with a filling layer 3;
the insulating layer 2 is made of a cross-linked polyethylene material, and the cross-linked polyethylene material is composed of the following raw materials in parts by weight: 40 parts of low-density polyethylene, 45 parts of flame retardant, 25 parts of high-density polyethylene resin, 4 parts of carbon black, 1.2 parts of antioxidant, 20 parts of silane coupling agent, 0.8 part of initiator, 1.6 parts of cross-linking agent, 1.3 parts of catalyst and 1.1 parts of phenylbutylene resin;
the preparation method of the insulating layer 2 comprises the following steps:
(1) uniformly mixing low-density polyethylene and high-density polyethylene resin, feeding the mixture into a feeding and drying device through a vacuum-pumping pipeline, drying the mixture at the temperature of 60 ℃, and discharging the mixture to obtain base material resin;
(2) adding the dried base material resin and the antioxidant into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1200r/min, and the stirring and mixing time is 10 min;
(3) adding the initiator, the flame retardant, the silane coupling agent and the carbon black into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1200r/min, and the stirring and mixing time is 10min to obtain a mixed material;
(4) adding the mixed material into a hopper of a double-screw extruder for extrusion granulation, wherein the temperature of the extruder is 200 ℃, the rotating speed is 420r/min, and the granulation diameter is 4.8mm, so as to obtain a material A;
(5) adding the cross-linking agent, the catalyst and the butylbenzene resin into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 1200r/min, and the stirring and mixing time is 10min to obtain a material B;
(6) then putting the material A and the material B into an internal mixer, taking out the materials until the current of the internal mixer tends to be in a stable state, and then carrying out melt extrusion to prepare a crosslinked polyethylene layer;
the outer sheath layer 7 and the inner sheath layer 6 are both made of halogen-free low-smoke flame-retardant polyolefin materials; the halogen-free low-smoke flame-retardant polyolefin material is prepared from the following raw materials in parts by weight: 60 parts of polyolefin resin, 80 parts of high-molecular graft, 75 parts of aluminum hydroxide, 45 parts of magnesium hydroxide, 3 parts of nano particles, 2.8 parts of coupling agent, 2.5 parts of coupling assistant agent, 0.8 part of antioxidant, 1.5 parts of lubricant, 2.4 parts of flame retardant and 5.5 parts of crosslinking sensitizer;
the preparation method of the halogen-free low-smoke flame-retardant polyolefin material comprises the following steps: adding polyolefin resin, a high-molecular graft, an antioxidant, a lubricant, a flame retardant and a crosslinking sensitizer into an internal mixer, carrying out low-speed internal mixing for 6min, adding aluminum hydroxide, magnesium hydroxide, a coupling agent and an auxiliary coupling agent when the temperature is raised to 110 ℃, carrying out internal mixing for 25min at the temperature of 140 ℃ to obtain an internal mixed mixture, adding the internal mixed mixture into a double-screw extruder for mixing, wherein the extrusion temperature of the double-screw extruder is 155 ℃; and finally, feeding the mixed material of the double screws into a single-screw extruder for extrusion, bracing, cooling and granulation to obtain the low-smoke halogen-free flame-retardant polyolefin material.
As a further scheme of the invention: the steel strip armor layer 5 is made of a galvanized steel strip material, the filling layer 3 is made of a flame-retardant rock wool rope material, and the wrapping tape layer 4 is made of a halogen-free low-smoke flame-retardant tape material.
As a further scheme of the invention: the halogen-free low-smoke flame-retardant belt material comprises the following raw materials in parts by weight: 30 parts of diphenylmethane diisonitrile ester, 45 parts of phosphoramide compounds, 25 parts of silane coupling agents, 35 parts of soft kaolin and 20 parts of hard clay.
As a further scheme of the invention: the preparation method of the halogen-free low-smoke flame-retardant belt material comprises the steps of placing diphenylmethane diisocyanate, a phosphoramide compound and a silane coupling agent in a 120 ℃ high-speed mixer, uniformly mixing, adding soft kaolin and hard clay, uniformly mixing, then feeding into a screw extruder for melting and mixing, extruding and granulating, and finally performing compression molding through a casting machine to obtain the halogen-free low-smoke flame-retardant belt material.
As a further scheme of the invention: the flame retardant adopts metal hydroxide, and the metal hydroxide is aluminum hydroxide and magnesium hydroxide.
As a further scheme of the invention: the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 300 and antioxidant 412 s.
As a further scheme of the invention: the crosslinking sensitizer is one or two of triallyl isocyanurate and trimethylolpropane trimethacrylate.
As a further scheme of the invention: the silane coupling agent is silane coupling agent A-172 or silane coupling agent Si-69.
As a further scheme of the invention: the lubricant is one or more of polyethylene wax, stearic acids, ACR and ethylene-vinyl acetate copolymer.
Comparative example 1
The comparative example is a common crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable in the market.
The performance test of the crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable prepared in the examples 1 to 3 and the comparative example is carried out, and the test results are shown in the following table 1 to 2;
TABLE 1
TABLE 2
The table shows that the cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable has excellent tensile property and flame retardance, does not generate gas containing halogen during combustion, and has a pH value of about 6.7 during combustion detection, so that fire spread is effectively inhibited, and the safety and reliability of equipment are ensured.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (9)
1. A cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable is characterized by comprising a conductor (1), an insulating layer (2), a filling layer (3), a belting layer (4), a steel belt armor layer (5), an inner sheath layer (6) and an outer sheath layer (7);
a belting layer (4) is arranged in the outer sheath layer (7), the conductors (1) are positioned in the belting layer (4) and are provided with a plurality of conductors, the insulating layer (2) is wrapped on the surface of the conductors (1), a steel belt armor layer (5) is wrapped on the inner layer surface of the outer sheath layer (7), an inner sheath layer (6) is arranged between the steel belt armor layer (5) and the belting layer (4), and a filling layer (3) is filled in a gap between the insulating layer (2) and the belting layer (4);
the insulating layer (2) is made of a cross-linked polyethylene material, and the cross-linked polyethylene material is composed of the following raw materials in parts by weight: 20-40 parts of low-density polyethylene, 20-45 parts of flame retardant, 10-25 parts of high-density polyethylene resin, 2-4 parts of carbon black, 0.6-1.2 parts of antioxidant, 10-20 parts of silane coupling agent, 0.4-0.8 part of initiator, 1.2-1.6 parts of cross-linking agent, 0.9-1.3 parts of catalyst and 0.7-1.1 parts of phenylbutyl resin;
the preparation method of the insulating layer (2) comprises the following steps:
(1) uniformly mixing low-density polyethylene and high-density polyethylene resin, feeding the mixture into a feeding and drying device through a vacuum-pumping pipeline, drying the mixture at the temperature of between 50 and 60 ℃, and discharging the mixture to obtain base material resin;
(2) adding the dried base material resin and the antioxidant into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-1200r/min, and the stirring and mixing time is 8-10 min;
(3) adding the initiator, the flame retardant, the silane coupling agent and the carbon black into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-;
(4) adding the mixed material into a hopper of a double-screw extruder for extrusion granulation, wherein the temperature of the extruder is 190-;
(5) adding the cross-linking agent, the catalyst and the butylbenzene resin into a high-speed stirrer, wherein the rotating speed of the high-speed stirrer is 900-;
(6) then putting the material A and the material B into an internal mixer, taking out the materials until the current of the internal mixer tends to be in a stable state, and then carrying out melt extrusion to prepare a crosslinked polyethylene layer;
the outer sheath layer (7) and the inner sheath layer (6) are both made of halogen-free low-smoke flame-retardant polyolefin materials, and the halogen-free low-smoke flame-retardant polyolefin materials are composed of the following raw materials in parts by weight: 25-60 parts of polyolefin resin, 35-80 parts of polymer graft, 35-75 parts of aluminum hydroxide, 25-45 parts of magnesium hydroxide, 1.2-3 parts of nano particles, 0.8-2.8 parts of coupling agent, 0.7-2.5 parts of coupling assistant agent, 0.25-0.8 part of antioxidant, 0.8-1.5 parts of lubricant, 0.8-2.4 parts of flame retardant and 1.8-5.5 parts of crosslinking sensitizer;
the preparation method of the halogen-free low-smoke flame-retardant polyolefin material comprises the following steps: adding polyolefin resin, a high-molecular graft, an antioxidant, a lubricant, a flame retardant and a crosslinking sensitizer into an internal mixer, carrying out low-speed internal mixing for 3-6min, adding aluminum hydroxide, magnesium hydroxide, a coupling agent and an auxiliary coupling agent when the temperature is raised to 85-110 ℃, carrying out continuous internal mixing for 15-25min at the temperature of 120-140 ℃ to obtain an internal mixed mixture, adding the internal mixed mixture into a double-screw extruder for mixing, wherein the extrusion temperature of the double-screw extruder is 125-155 ℃; and finally, feeding the mixed material of the double screws into a single-screw extruder for extrusion, bracing, cooling and granulation to obtain the low-smoke halogen-free flame-retardant polyolefin material.
2. The cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the steel tape armor layer (5) is made of galvanized steel tape material, the filling layer (3) is made of flame-retardant rock wool rope material, and the wrapping tape layer (4) is made of halogen-free low-smoke flame-retardant tape material.
3. The cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 2, characterized in that the halogen-free low-smoke flame-retardant belt material comprises the following raw materials in parts by weight: 10-30 parts of diphenylmethane diisocyanate, 25-45 parts of phosphoramide compounds, 10-25 parts of silane coupling agents, 15-35 parts of soft kaolin and 6-20 parts of hard clay.
4. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 3, wherein the preparation method of the halogen-free low-smoke flame-retardant belt material comprises the steps of placing diphenylmethane diisonitrile ester, a phosphoramide compound and a silane coupling agent in a high-speed mixer at 90-120 ℃, uniformly mixing, adding soft kaolin and hard clay, uniformly mixing, then feeding into a screw extruder for melt mixing, extruding and granulating, and finally performing compression molding by a casting machine to obtain the halogen-free low-smoke flame-retardant belt material.
5. The cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the flame retardant is metal hydroxide, and the metal hydroxide is aluminum hydroxide and magnesium hydroxide.
6. The cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 300 and antioxidant 412 s.
7. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the crosslinking sensitizer is one or two of triallyl isocyanurate and trimethylolpropane trimethacrylate.
8. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the silane coupling agent is silane coupling agent A-172 or silane coupling agent Si-69.
9. The cross-linked polyethylene insulated halogen-free low-smoke flame-retardant power cable according to claim 1, wherein the lubricant is one or more of polyethylene wax, stearic acids, ACR and ethylene-vinyl acetate copolymer.
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