CN116987345B - Heat-resistant insulating overhead cable and preparation method thereof - Google Patents

Heat-resistant insulating overhead cable and preparation method thereof Download PDF

Info

Publication number
CN116987345B
CN116987345B CN202311256824.0A CN202311256824A CN116987345B CN 116987345 B CN116987345 B CN 116987345B CN 202311256824 A CN202311256824 A CN 202311256824A CN 116987345 B CN116987345 B CN 116987345B
Authority
CN
China
Prior art keywords
parts
protective layer
overhead cable
antioxidant
stearate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311256824.0A
Other languages
Chinese (zh)
Other versions
CN116987345A (en
Inventor
曾昭龙
王龙晖
刘杰生
郭文材
林子坤
谭灼年
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South Pearl River Technology Co ltd
Original Assignee
South Pearl River Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by South Pearl River Technology Co ltd filed Critical South Pearl River Technology Co ltd
Priority to CN202311256824.0A priority Critical patent/CN116987345B/en
Publication of CN116987345A publication Critical patent/CN116987345A/en
Application granted granted Critical
Publication of CN116987345B publication Critical patent/CN116987345B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • 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
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/008—Power cables for overhead application
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to a heat-resistant insulating overhead cable and a preparation method thereof, wherein the cable comprises a protective layer, an insulating layer and a wire core wire, and the protective layer comprises the following material components in parts by weight: 56-72 parts of high-density polypropylene, 15-20 parts of polyolefin elastomer, 12-18 parts of ethylene-vinyl acetate copolymer, 21-34 parts of flame retardant filler, 2.5-5 parts of calcium-zinc composite stabilizer, 1.3-1.7 parts of stearate, 0.5-1.5 parts of light stabilizer and 0.6-1.2 parts of antioxidant. The protective layer material adopts high-density polypropylene as a main material, polyolefin elastomer and ethylene-vinyl acetate copolymer as auxiliary reinforcing materials, flame-retardant filler is used as filler and fuel-resistant material, and additives such as lubricant, stabilizer and the like are added. The cable protective layer has the advantages of greatly improved heat resistance, excellent flame retardant effect and mechanical property, and strong aging resistance.

Description

Heat-resistant insulating overhead cable and preparation method thereof
Technical Field
The invention relates to the field of cables, in particular to a heat-resistant insulating overhead cable and a preparation method thereof.
Background
The overhead cable is also called overhead insulating cable, is an overhead conductor with insulating layer and protecting outer skin, and is a special cable similar to cross-linked cable production process, and is a new power transmission mode between overhead conductor and underground cable. The overhead cable is single-core and can be divided into a hard aluminum wire structure, a hard-drawn copper wire structure, an aluminum alloy wire structure, a steel core or aluminum alloy core supporting structure, a self-supporting three-core grain structure (the wire core can be hard aluminum or hard copper wire) and the like according to different structures, and has the main characteristics of high power supply reliability, good power supply safety, convenience in erection and maintenance, reasonable economy and the like.
In recent years, with the rapid development of economy in China, the fire caused by electricity is increased year by year, and the fire caused by wires and cables is in a considerable proportion, the fire caused by wires and cables is usually caused by the aging and damage of the outer protective layer of the cable, the insulation property of the cable is reduced, and the cable is short-circuited, and the fire is spread along the cable line to increase the hazard of the fire due to the fact that the contact resistance in the cable is overlarge, so that a cable with heat resistance and flame retardance is urgently required.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a heat-resistant insulated overhead cable and a preparation method thereof.
The aim of the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a heat-resistant insulated overhead cable, which comprises a protective layer, an insulating layer and a wire core wire, wherein the protective layer comprises the following material components in parts by weight:
56-72 parts of high-density polypropylene, 15-20 parts of polyolefin elastomer, 12-18 parts of ethylene-vinyl acetate copolymer, 21-34 parts of flame retardant filler, 2.5-5 parts of calcium-zinc composite stabilizer, 1.3-1.7 parts of stearate, 0.5-1.5 parts of light stabilizer and 0.6-1.2 parts of antioxidant.
Preferably, the high density polypropylene has a density of 0.94 to 0.96g/cm 3 Melt flow rate 1.6-1.8g/10min (190 ℃,2.16 kg); more preferably, the high density polypropylene has a density of 0.952g/cm 3 The melt flow rate was 1.7g/10min at 190℃under 2.16 kg.
Preferably, the polyolefin elastomer is Korean SK-POE-875 with a density of 0.86-0.88g/cm 3 The melt flow rate is 4.8-5.2g/10min at 190 ℃ under 2.16 kg.
Preferably, the ethylene-vinyl acetate copolymer has a Vinyl Acetate (VA) content of 16% to 20%.
Preferably, the calcium zinc composite stabilizer formulation number comprises one or more of CZ-310, CZ-106, CZ-371.
Preferably, the stearate comprises one or more of sodium stearate, magnesium stearate, calcium stearate.
Preferably, the type of light stabilizer includes one or more of light stabilizer 770, light stabilizer 783, light stabilizer 944.
Preferably, the type of antioxidant includes one or more of antioxidant 2246, antioxidant 425, antioxidant 330.
Preferably, the preparation process of the flame-retardant filler comprises the following steps:
s1, weighing halloysite nanotubes, dispersing in thionyl chloride, refluxing and stirring for 6-10 hours at 60-80 ℃ under the protection of nitrogen, filtering to obtain a solid product, washing with acetone for three times, and drying at 50-60 ℃ to obtain chlorinated halloysite nanotubes;
s2, dispersing the acyl chloride halloysite nanotubes into N, N-dimethylformamide, introducing nitrogen as a protective gas, adding triethylamine, continuously dropwise adding 4-aminostyrene within half an hour after full mixing, stirring at room temperature for 8-12 hours after the dropwise adding is finished, filtering to obtain a solid product, washing with acetone for three times, and drying at 50-60 ℃ to obtain the vinyl amidated halloysite nanotubes;
s3, dispersing the vinyl amidated halloysite nanotubes in N, N-dimethylformamide, introducing nitrogen as a protective gas, after dispersing uniformly, adding 2-mercaptopyridine, dispersing uniformly again, then adding an initiator benzophenone, stirring for 30-50min under ultraviolet irradiation, removing the irradiation, filtering to obtain a solid product, washing three times by using acetone, and drying at 50-60 ℃ to obtain the flame-retardant filler.
Preferably, in the S1 process, the purity of the halloysite nanotube is more than or equal to 99%, the silicon dioxide content is 45% -48%, the length is 0.5-1.5 mu m, the outer diameter of the tube is 50-100nm, and the inner diameter of the tube is 18-25nm.
Preferably, in the S1 process, the mass ratio of the halloysite nanotubes to the thionyl chloride is 1:10-20.
Preferably, in the S2 process, the mass ratio of the acidyl chlorinated halloysite nanotube, the 4-aminostyrene, the triethylamine and the N, N-dimethylformamide is 1:0.12-0.18:0.02-0.06:10-20.
Preferably, in the S3 process, the mass ratio of the vinyl amidated halloysite nanotube, the 2-mercaptopyridine and the N, N-dimethylformamide is 1:0.11-0.16:10-20, and the addition amount of the benzophenone is 3-6% of the mass of the 2-mercaptopyridine.
Preferably, the material composition of the insulating layer is crosslinked polyethylene, and the marks are one of XLPE LE0592S, XLPE LS4201H, XLPE LE4423 and XLPE LE 4438.
Preferably, the material composition of the wire core lead is one of pure aluminum, pure copper and copper-aluminum alloy.
In a second aspect, the invention provides a method for preparing a heat-resistant insulated overhead cable, comprising the steps of:
step 1, respectively weighing high-density polypropylene, polyolefin elastomer, ethylene-vinyl acetate copolymer, flame-retardant filler, calcium-zinc composite stabilizer, stearate, light stabilizer and antioxidant, drying, and placing in a stirrer for stirring and mixing to form a uniform mixture;
step 2, introducing the mixture into a double-screw extruder, extruding and granulating at 220-250 ℃ to form a material of the protective layer;
and step 3, sequentially coating the material of the insulating layer and the material of the protective layer on the wire core conductor to prepare the heat-resistant insulating overhead cable.
Preferably, the thickness of the protective layer is 1.5-3.5mm, and the thickness of the insulating layer is 0.5-1.5mm.
The beneficial effects of the invention are as follows:
1. the invention prepares the overhead cable, and the outer protective layer of the overhead cable is reinforced and modified. The protective layer material adopts high-density polypropylene as a main material, polyolefin elastomer and ethylene-vinyl acetate copolymer as auxiliary reinforcing materials, flame-retardant filler is used as filler and fuel-resistant material, and additives such as lubricant, stabilizer and the like are added. The prepared cable protective layer has the advantages of greatly improved heat resistance, excellent flame retardant effect and mechanical property, and strong aging resistance.
2. The flame-retardant filler is prepared by taking halloysite nanotubes as a carrier material, wherein the surfaces of the halloysite nanotubes contain rich active hydroxyl groups, so that the halloysite nanotubes are subjected to acyl chlorination treatment to obtain the acyl chlorinated halloysite nanotubes; then combining the nano-tube with 4-aminostyrene, and reacting amino with acyl chloride on the surface of the nano-tube to generate amide, so as to obtain the amide crosslinked halloysite nano-tube containing vinyl; then combining with 2-mercapto pyridine containing mercapto, and carrying out click chemistry reaction on the mercapto and vinyl to generate thioether groups, thus finally preparing the halloysite nanotube coated with thioether groups and amide groups.
3. The halloysite nanotube can be used as a flame-retardant material and has a high specific surface area, and the flame-retardant filler is prepared by modifying the halloysite nanotube, so that the surface of the halloysite nanotube is rich in thioether groups and amide groups, the groups have certain flame retardance, the flame retardance of the halloysite nanotube is enhanced, and meanwhile, the fusion property of the halloysite nanotube and a polymer can be enhanced, and the halloysite nanotube can be better crosslinked with raw materials such as polypropylene, so that various performances of the whole cable protective layer material are enhanced.
Detailed Description
The technical scheme of the invention is described below through specific examples. It is to be understood that the mention of one or more method steps of the present invention does not exclude the presence of other method steps before and after the combination step or that other method steps may be interposed between these explicitly mentioned steps; it should also be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the invention in which the invention may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the invention without substantial modification to the technical matter.
In order to better understand the above technical solution, exemplary embodiments of the present invention are described in more detail below. While exemplary embodiments of the invention are shown, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention is further described with reference to the following examples.
Example 1
A heat-resistant insulated overhead cable comprises a protective layer, an insulating layer and a wire core wire, wherein the insulating layer is made of crosslinked polyethylene and has the mark XLPE LE0592S. The material composition of the wire core lead is pure aluminum. The thickness of the protective layer is 2.5mm, and the thickness of the insulating layer is 1mm. The material components of the protective layer are calculated according to parts by weight:
64 parts of high-density polypropylene, 18 parts of polyolefin elastomer, 15 parts of ethylene-vinyl acetate copolymer, 27 parts of flame-retardant filler, 3.5 parts of calcium-zinc composite stabilizer, 1.5 parts of stearate, 1 part of light stabilizer and 0.8 part of antioxidant.
The density of the high-density polypropylene is 0.952g/cm 3 The melt flow rate was 1.7g/10min at 190℃under 2.16 kg. The polyolefin elastomer has a model of Korean SK-POE-875 and a density of 0.87g/cm 3 The melt flow rate was 5g/10min at 190℃and 2.16 kg. The ethylene-vinyl acetate copolymer had a Vinyl Acetate (VA) content of 18%. The model of the calcium-zinc composite stabilizer is CZ-310. The stearate is sodium stearate. The type of the light stabilizer is light stabilizer 770. The type of the antioxidant is antioxidant 2246.
The preparation process of the flame-retardant filler comprises the following steps:
s1, weighing halloysite nanotubes, dispersing in thionyl chloride, refluxing and stirring for 8 hours at 70 ℃ under the protection of nitrogen, filtering to obtain a solid product, washing with acetone for three times, and drying at 55 ℃ to obtain chlorinated halloysite nanotubes; the purity of the halloysite nanotube is more than or equal to 99%, the silicon dioxide content is 45% -48%, the length is 0.5-1.5 mu m, the outer diameter of the tube is 50-100nm, and the inner diameter of the tube is 18-25nm. The mass ratio of halloysite nanotubes to thionyl chloride is 1:15.
S2, dispersing the acyl chloride halloysite nanotubes into N, N-dimethylformamide, introducing nitrogen as a protective gas, adding triethylamine, continuously dropwise adding 4-aminostyrene within half an hour after full mixing, stirring at room temperature for 10 hours after dropwise adding, filtering to obtain a solid product, washing with acetone for three times, and drying at 55 ℃ to obtain the vinyl amidated halloysite nanotubes; the mass ratio of the acyl chloride halloysite nanotube, the 4-aminostyrene, the triethylamine and the N, N-dimethylformamide is 1:0.15:0.04:15.
S3, dispersing the vinyl amidated halloysite nanotubes in N, N-dimethylformamide, introducing nitrogen as a protective gas, after dispersing uniformly, adding 2-mercaptopyridine, dispersing uniformly again, then adding an initiator benzophenone, stirring for 40min under ultraviolet light, removing the light, filtering to obtain a solid product, cleaning three times by using acetone, and drying at 55 ℃ to obtain the flame-retardant filler. The mass ratio of the vinyl amidated halloysite nanotube, the 2-mercaptopyridine and the N, N-dimethylformamide is 1:0.14:15, and the addition amount of the benzophenone is 5% of the mass of the 2-mercaptopyridine.
The preparation method of the heat-resistant insulated overhead cable comprises the following steps:
step 1, respectively weighing high-density polypropylene, polyolefin elastomer, ethylene-vinyl acetate copolymer, flame-retardant filler, calcium-zinc composite stabilizer, stearate, light stabilizer and antioxidant, drying, and placing in a stirrer for stirring and mixing to form a uniform mixture;
step 2, introducing the mixture into a double-screw extruder, extruding and granulating at 220-250 ℃ to form a material of the protective layer;
and step 3, sequentially coating the material of the insulating layer and the material of the protective layer on the wire core conductor to prepare the heat-resistant insulating overhead cable.
Example 2
A heat-resistant insulated overhead cable comprises a protective layer, an insulating layer and a wire core wire, wherein the insulating layer is made of crosslinked polyethylene and has the brand XLPE LS4201H. The material composition of the wire core lead is pure copper. The thickness of the protective layer is 1.5mm, and the thickness of the insulating layer is 0.5mm. The material components of the protective layer are calculated according to parts by weight:
56 parts of high-density polypropylene, 15 parts of polyolefin elastomer, 12 parts of ethylene-vinyl acetate copolymer, 21 parts of flame-retardant filler, 2.5 parts of calcium-zinc composite stabilizer, 1.3 parts of stearate, 0.5 part of light stabilizer and 0.6 part of antioxidant.
The density of the high-density polypropylene is 0.952g/cm 3 At 190℃and 2The melt flow rate was 1.7g/10min at 16 kg. The polyolefin elastomer has a model of Korean SK-POE-875 and a density of 0.87g/cm 3 The melt flow rate was 5g/10min at 190℃and 2.16 kg. The ethylene-vinyl acetate copolymer had a Vinyl Acetate (VA) content of 18%. The model of the calcium-zinc composite stabilizer is CZ-106. The stearate is magnesium stearate. The type of the light stabilizer is light stabilizer 783. The antioxidant is of the type 425.
The preparation process of the flame-retardant filler comprises the following steps:
s1, weighing halloysite nanotubes, dispersing in thionyl chloride, refluxing and stirring for 6 hours at 60 ℃ under the protection of nitrogen, filtering to obtain a solid product, washing with acetone for three times, and drying at 50 ℃ to obtain chlorinated halloysite nanotubes; the purity of the halloysite nanotube is more than or equal to 99%, the silicon dioxide content is 45% -48%, the length is 0.5-1.5 mu m, the outer diameter of the tube is 50-100nm, and the inner diameter of the tube is 18-25nm. The mass ratio of halloysite nanotubes to thionyl chloride is 1:10.
S2, dispersing the acidyl chlorinated halloysite nanotube into N, N-dimethylformamide, introducing nitrogen as a protective gas, adding triethylamine, continuously dropwise adding 4-aminostyrene within half an hour after full mixing, stirring at room temperature for 8 hours after dropwise adding, filtering to obtain a solid product, washing with acetone for three times, and drying at 50 ℃ to obtain the vinyl amidated halloysite nanotube; the mass ratio of the acyl chloride halloysite nanotube, the 4-aminostyrene, the triethylamine and the N, N-dimethylformamide is 1:0.12:0.02:10.
S3, dispersing the vinyl amidated halloysite nanotubes in N, N-dimethylformamide, introducing nitrogen as a protective gas, after dispersing uniformly, adding 2-mercaptopyridine, dispersing uniformly again, then adding an initiator benzophenone, stirring for 30min under ultraviolet light, removing the light, filtering to obtain a solid product, cleaning three times by using acetone, and drying at 50 ℃ to obtain the flame-retardant filler. The mass ratio of the vinyl amidated halloysite nanotube, the 2-mercaptopyridine and the N, N-dimethylformamide is 1:0.11:10, and the addition amount of the benzophenone is 3% of the mass of the 2-mercaptopyridine.
The preparation method of the heat-resistant insulated overhead cable comprises the following steps:
step 1, respectively weighing high-density polypropylene, polyolefin elastomer, ethylene-vinyl acetate copolymer, flame-retardant filler, calcium-zinc composite stabilizer, stearate, light stabilizer and antioxidant, drying, and placing in a stirrer for stirring and mixing to form a uniform mixture;
step 2, introducing the mixture into a double-screw extruder, extruding and granulating at 220-250 ℃ to form a material of the protective layer;
and step 3, sequentially coating the material of the insulating layer and the material of the protective layer on the wire core conductor to prepare the heat-resistant insulating overhead cable.
Example 3
A heat-resistant insulated overhead cable comprises a protective layer, an insulating layer and a wire core wire, wherein the insulating layer is made of crosslinked polyethylene and has the mark XLPE LE4423. The material composition of the wire core lead is copper-aluminum alloy. The thickness of the protective layer is 3.5mm, and the thickness of the insulating layer is 1.5mm. The material components of the protective layer are calculated according to parts by weight:
72 parts of high-density polypropylene, 20 parts of polyolefin elastomer, 18 parts of ethylene-vinyl acetate copolymer, 34 parts of flame-retardant filler, 5 parts of calcium-zinc composite stabilizer, 1.7 parts of stearate, 1.5 parts of light stabilizer and 1.2 parts of antioxidant.
The density of the high-density polypropylene is 0.952g/cm 3 The melt flow rate was 1.7g/10min at 190℃under 2.16 kg. The polyolefin elastomer has a model of Korean SK-POE-875 and a density of 0.87g/cm 3 The melt flow rate was 5g/10min at 190℃and 2.16 kg. The ethylene-vinyl acetate copolymer had a Vinyl Acetate (VA) content of 18%. The model of the calcium-zinc composite stabilizer is CZ-371. The stearate is calcium stearate. The light stabilizer is model number light stabilizer 944. The antioxidant is of the type 330.
The preparation process of the flame-retardant filler comprises the following steps:
s1, weighing halloysite nanotubes, dispersing in thionyl chloride, refluxing and stirring for 10 hours at 80 ℃ under the protection of nitrogen, filtering to obtain a solid product, washing with acetone for three times, and drying at 60 ℃ to obtain chlorinated halloysite nanotubes; the purity of the halloysite nanotube is more than or equal to 99%, the silicon dioxide content is 45% -48%, the length is 0.5-1.5 mu m, the outer diameter of the tube is 50-100nm, and the inner diameter of the tube is 18-25nm. The mass ratio of halloysite nanotubes to thionyl chloride is 1:20.
S2, dispersing the acyl chloride halloysite nanotubes into N, N-dimethylformamide, introducing nitrogen as a protective gas, adding triethylamine, continuously dropwise adding 4-aminostyrene within half an hour after full mixing, stirring at room temperature for 12 hours after dropwise adding, filtering to obtain a solid product, washing with acetone for three times, and drying at 60 ℃ to obtain the vinyl amidated halloysite nanotubes; the mass ratio of the acyl chloride halloysite nanotube, the 4-aminostyrene, the triethylamine and the N, N-dimethylformamide is 1:0.18:0.06:20.
S3, dispersing the vinyl amidated halloysite nanotubes in N, N-dimethylformamide, introducing nitrogen as a protective gas, after dispersing uniformly, adding 2-mercaptopyridine, dispersing uniformly again, then adding an initiator benzophenone, stirring for 50min under ultraviolet light, removing the light, filtering to obtain a solid product, cleaning three times by using acetone, and drying at 60 ℃ to obtain the flame-retardant filler. The mass ratio of the vinyl amidated halloysite nanotube, the 2-mercaptopyridine and the N, N-dimethylformamide is 1:0.16:20, and the addition amount of the benzophenone is 6% of the mass of the 2-mercaptopyridine.
The preparation method of the heat-resistant insulated overhead cable comprises the following steps:
step 1, respectively weighing high-density polypropylene, polyolefin elastomer, ethylene-vinyl acetate copolymer, flame-retardant filler, calcium-zinc composite stabilizer, stearate, light stabilizer and antioxidant, drying, and placing in a stirrer for stirring and mixing to form a uniform mixture;
step 2, introducing the mixture into a double-screw extruder, extruding and granulating at 220-250 ℃ to form a material of the protective layer;
and step 3, sequentially coating the material of the insulating layer and the material of the protective layer on the wire core conductor to prepare the heat-resistant insulating overhead cable.
Comparative example 1
The protective layer of the cable is different from the protective layer of example 1 in that the flame-retardant filler is halloysite nanotubes.
The material components of the protective layer are calculated according to parts by weight:
64 parts of high-density polypropylene, 18 parts of polyolefin elastomer, 15 parts of ethylene-vinyl acetate copolymer, 27 parts of flame-retardant filler, 3.5 parts of calcium-zinc composite stabilizer, 1.5 parts of stearate, 1 part of light stabilizer and 0.8 part of antioxidant.
Comparative example 2
The protective layer of the cable is different from the protective layer of example 1 in that the flame-retardant filler is a vinyl amidated halloysite nanotube (the preparation process is the same as example 1).
The material components of the protective layer are calculated according to parts by weight:
64 parts of high-density polypropylene, 18 parts of polyolefin elastomer, 15 parts of ethylene-vinyl acetate copolymer, 27 parts of flame-retardant filler, 3.5 parts of calcium-zinc composite stabilizer, 1.5 parts of stearate, 1 part of light stabilizer and 0.8 part of antioxidant.
Comparative example 3
The material of the cable protective layer is different from that of the protective layer in the embodiment 1 in that the flame-retardant filler is a mixture of halloysite nanotubes and 2-mercaptopyridine, and the mass ratio of the halloysite nanotubes to the 2-mercaptopyridine is 1:0.14.
The material components of the protective layer are calculated according to parts by weight:
64 parts of high-density polypropylene, 18 parts of polyolefin elastomer, 15 parts of ethylene-vinyl acetate copolymer, 27 parts of flame-retardant filler, 3.5 parts of calcium-zinc composite stabilizer, 1.5 parts of stearate, 1 part of light stabilizer and 0.8 part of antioxidant.
Experimental detection
The protective layer materials prepared in example 1, comparative example 2 and comparative example 3 were subjected to performance test, and tensile strength and elongation at break were measured with reference to GB/T1701-2001; detection reference standard GB/T2406.2-2009 for oxygen index; aging is the measurement of tensile strength and elongation at break after 168 hours of treatment in a 100℃oven. The detection results are shown in Table 1.
TABLE 1 Performance of different protective layer materials
Example 1 Comparative example 1 Comparative example 2 Comparative example 3
Tensile Strength (MPa) 61.7 50.1 55.2 54.7
Elongation at break (%) 378 324 357 361
High temperature resistance (DEG C) 145 112 125 131
Limiting oxygen index (%) 36 31 33 35
Tensile Strength Change Rate after aging (%) -5.3 -13.7 -7.5 -8.3
Elongation at break change after aging (%) -11.4 -20.4 -15.7 -16.2
As can be seen from table 1, the protective layer material prepared in example 1 of the present invention has higher mechanical strength, higher high temperature resistance, better flame retardance and better aging resistance, and has better performance in the application aspect of cables than the protective layer material prepared in comparative example 1.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (9)

1. The heat-resistant insulated overhead cable is characterized by comprising a protective layer, an insulating layer and a wire core wire, wherein the protective layer comprises the following material components in parts by weight:
56-72 parts of high-density polypropylene, 15-20 parts of polyolefin elastomer, 12-18 parts of ethylene-vinyl acetate copolymer, 21-34 parts of flame retardant filler, 2.5-5 parts of calcium-zinc composite stabilizer, 1.3-1.7 parts of stearate, 0.5-1.5 parts of light stabilizer and 0.6-1.2 parts of antioxidant;
the preparation process of the flame-retardant filler comprises the following steps:
s1, weighing halloysite nanotubes, dispersing in thionyl chloride, refluxing and stirring for 6-10 hours at 60-80 ℃ under the protection of nitrogen, filtering to obtain a solid product, washing with acetone for three times, and drying at 50-60 ℃ to obtain chlorinated halloysite nanotubes;
s2, dispersing the acyl chloride halloysite nanotubes into N, N-dimethylformamide, introducing nitrogen as a protective gas, adding triethylamine, continuously dropwise adding 4-aminostyrene within half an hour after full mixing, stirring at room temperature for 8-12 hours after the dropwise adding is finished, filtering to obtain a solid product, washing with acetone for three times, and drying at 50-60 ℃ to obtain the vinyl amidated halloysite nanotubes;
s3, dispersing the vinyl amidated halloysite nanotubes in N, N-dimethylformamide, introducing nitrogen as a protective gas, after dispersing uniformly, adding 2-mercaptopyridine, dispersing uniformly again, then adding an initiator benzophenone, stirring for 30-50min under ultraviolet irradiation, removing the irradiation, filtering to obtain a solid product, washing three times by using acetone, and drying at 50-60 ℃ to obtain the flame-retardant filler.
2. The insulated overhead cable of claim 1, wherein the high density polypropylene has a density of 0.94-0.96g/cm 3 A melt flow rate of 1.6-1.8g/10min at 190℃under 2.16 kg; the polyolefin elastomer has a model of Korean SK-POE-875 and a density of 0.86-0.88g/cm 3 The melt flow rate is 4.8-5.2g/10min at 190 ℃ under 2.16 kg.
3. The insulated overhead cable of claim 1, wherein the ethylene-vinyl acetate copolymer has a vinyl acetate content of 16% to 20%.
4. The insulated cable of claim 1, wherein the calcium zinc composite stabilizer type number comprises one or more of CZ-310, CZ-106, CZ-371.
5. The insulated overhead cable of claim 1, wherein the stearate comprises one or more of sodium stearate, magnesium stearate, and calcium stearate.
6. A heat resistant insulated overhead cable according to claim 1, wherein the type of light stabilizer comprises one or more of light stabilizer 770, light stabilizer 783, light stabilizer 944.
7. The insulated overhead cable of claim 1, wherein the antioxidant is one or more of the antioxidant 2246, antioxidant 425, and antioxidant 330.
8. The heat-resistant insulated overhead cable according to claim 1, wherein the mass ratio of halloysite nanotubes to thionyl chloride in the S1 process is 1:10-20; in the S2 process, the mass ratio of the acyl chloride halloysite nanotube, the 4-aminostyrene, the triethylamine and the N, N-dimethylformamide is 1:0.12-0.18:0.02-0.06:10-20; in the S3 process, the mass ratio of the vinyl amidated halloysite nanotube, the 2-mercaptopyridine and the N, N-dimethylformamide is 1:0.11-0.16:10-20, and the adding amount of the diphenyl ketone is 3-6% of the mass of the 2-mercaptopyridine.
9. A method of making a heat resistant insulated overhead cable of claim 1, comprising the steps of:
step 1, respectively weighing high-density polypropylene, polyolefin elastomer, ethylene-vinyl acetate copolymer, flame-retardant filler, calcium-zinc composite stabilizer, stearate, light stabilizer and antioxidant, drying, and placing in a stirrer for stirring and mixing to form a uniform mixture;
step 2, introducing the mixture into a double-screw extruder, extruding and granulating at 220-250 ℃ to form a material of the protective layer;
and step 3, sequentially coating the material of the insulating layer and the material of the protective layer on the wire core conductor to prepare the heat-resistant insulating overhead cable.
CN202311256824.0A 2023-09-27 2023-09-27 Heat-resistant insulating overhead cable and preparation method thereof Active CN116987345B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311256824.0A CN116987345B (en) 2023-09-27 2023-09-27 Heat-resistant insulating overhead cable and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311256824.0A CN116987345B (en) 2023-09-27 2023-09-27 Heat-resistant insulating overhead cable and preparation method thereof

Publications (2)

Publication Number Publication Date
CN116987345A CN116987345A (en) 2023-11-03
CN116987345B true CN116987345B (en) 2023-12-01

Family

ID=88523609

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311256824.0A Active CN116987345B (en) 2023-09-27 2023-09-27 Heat-resistant insulating overhead cable and preparation method thereof

Country Status (1)

Country Link
CN (1) CN116987345B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117467218B (en) * 2023-12-28 2024-03-12 南方珠江科技有限公司 Tensile compression-resistant photoelectric composite cable

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3079103B1 (en) * 1999-05-20 2000-08-21 財団法人工業技術研究院 Method for producing thermoplastic nanocomposite
JP2008201825A (en) * 2007-02-16 2008-09-04 Furukawa Electric Co Ltd:The Method for producing organically treated filler
CN104311968A (en) * 2014-11-05 2015-01-28 安徽恒晶电缆集团有限公司 Modified polyethylene material for aerial cables
CN104558848A (en) * 2015-01-19 2015-04-29 苏州银禧科技有限公司 Halloysite nanotube-enhanced conducting polypropylene material and preparation method thereof
CN105949784A (en) * 2016-05-12 2016-09-21 东莞市联洲知识产权运营管理有限公司 Efficient insulating heat-resisting silicone rubber cable material and preparation method thereof
JP2016176060A (en) * 2015-03-20 2016-10-06 東レ株式会社 Polyamide resin composition and molded part obtained by molding the same
JP2020012069A (en) * 2018-07-19 2020-01-23 住友ゴム工業株式会社 Dispersion, production method, rubber composition and pneumatic tire
CN110878155A (en) * 2019-12-03 2020-03-13 中国科学技术大学 Halogen-free flame-retardant external insulation material for nuclear power station cable and preparation method thereof
CN111117054A (en) * 2019-12-31 2020-05-08 安徽蒙特尔电缆集团有限公司 Low-smoke halogen-free flame-retardant B1-grade polyolefin cable sheath material and preparation method thereof
CN112778671A (en) * 2021-01-29 2021-05-11 安徽国通电力建设有限公司 Flame-retardant silane cross-linked polyvinyl chloride cable
CN113512250A (en) * 2021-07-15 2021-10-19 常丰线缆有限公司 Photovoltaic cable
CN114874534A (en) * 2022-06-20 2022-08-09 中国科学技术大学 Durable antioxidant flame-retardant polymer composite material and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013005307A1 (en) * 2013-03-25 2014-09-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Use of organic oxyimides as flame retardants for plastics and flame-retardant plastic composition and molded part produced therefrom

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3079103B1 (en) * 1999-05-20 2000-08-21 財団法人工業技術研究院 Method for producing thermoplastic nanocomposite
JP2008201825A (en) * 2007-02-16 2008-09-04 Furukawa Electric Co Ltd:The Method for producing organically treated filler
CN104311968A (en) * 2014-11-05 2015-01-28 安徽恒晶电缆集团有限公司 Modified polyethylene material for aerial cables
CN104558848A (en) * 2015-01-19 2015-04-29 苏州银禧科技有限公司 Halloysite nanotube-enhanced conducting polypropylene material and preparation method thereof
JP2016176060A (en) * 2015-03-20 2016-10-06 東レ株式会社 Polyamide resin composition and molded part obtained by molding the same
CN105949784A (en) * 2016-05-12 2016-09-21 东莞市联洲知识产权运营管理有限公司 Efficient insulating heat-resisting silicone rubber cable material and preparation method thereof
JP2020012069A (en) * 2018-07-19 2020-01-23 住友ゴム工業株式会社 Dispersion, production method, rubber composition and pneumatic tire
CN110878155A (en) * 2019-12-03 2020-03-13 中国科学技术大学 Halogen-free flame-retardant external insulation material for nuclear power station cable and preparation method thereof
CN111117054A (en) * 2019-12-31 2020-05-08 安徽蒙特尔电缆集团有限公司 Low-smoke halogen-free flame-retardant B1-grade polyolefin cable sheath material and preparation method thereof
CN112778671A (en) * 2021-01-29 2021-05-11 安徽国通电力建设有限公司 Flame-retardant silane cross-linked polyvinyl chloride cable
CN113512250A (en) * 2021-07-15 2021-10-19 常丰线缆有限公司 Photovoltaic cable
CN114874534A (en) * 2022-06-20 2022-08-09 中国科学技术大学 Durable antioxidant flame-retardant polymer composite material and preparation method thereof

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Preparation of HNTs‐d‐GO hybrid nanoparticles for gallic acid epoxy composites with improved thermal and mechanical properties;ZHAO et al.;《Polymer Composites 》;第5133-5144页 *
埃洛石/聚合物复合材料界面改性及性能研究进展;常宝宝等;《现代塑料加工应用》;第23卷(第5期);第59-63页 *
埃洛石对聚丙烯阻燃的影响及阻燃机理;黄思雯等;《塑料》;第46卷(第1期);第22-25页 *
巯基功能化埃洛石纳米管对Au（S2O3）2的吸附性能;李娇等;《有色金属工程》;第12卷(第3期);第62-69页 *

Also Published As

Publication number Publication date
CN116987345A (en) 2023-11-03

Similar Documents

Publication Publication Date Title
US5656371A (en) Insulating composition and formed article thereof
CN116987345B (en) Heat-resistant insulating overhead cable and preparation method thereof
JP5201105B2 (en) Polybutylene naphthalate resin composition and electric wire using polybutylene naphthalate resin composition
CN109651691B (en) Low-temperature-resistant oil-resistant torsion-resistant low-smoke halogen-free flame-retardant wind energy cable sheath material and preparation method and application thereof
CA2303600C (en) A crosslinkable polyethylene composition
KR102487667B1 (en) Manufacturing method of high flame retardant thermoplastic elastomer compound and electric cable for vessels operating in ice-covered waters having flexibility, cold resistance, oil resistance and ice accretion resistance
CN112053808A (en) Manufacturing process of ultraviolet crosslinked cable
CN114672095A (en) High-flame-retardancy low-smoke halogen-free cable sheath material and preparation method thereof
CN114188085A (en) Multi-core flexible mineral insulation fireproof cable and preparation method thereof
CN110092991B (en) Long-life PVC cable
JPS5828688B2 (en) Conductor coating method
CN111925653A (en) Thin-wall low-smoke halogen-free flame-retardant insulating material and preparation method thereof
CN114864163B (en) High-temperature-resistant flame-retardant cable
CN113689976B (en) Circulating low-temperature flame-retardant high-voltage power cable material and preparation method thereof
CN117095864A (en) 66 kV-500 kV high-voltage modified polypropylene insulated cable and manufacturing method thereof
JP5282843B2 (en) Electric wire and cable using polybutylene naphthalate resin composition
KR100874596B1 (en) Fabricating method for hffr(halogen free flame retardent) cable and compounds of the same
CN113314262B (en) Cable with steel wire braided structure and preparation method thereof
CN114058110A (en) Halogen-free flame-retardant modified cable material and preparation method thereof
CN109119199B (en) High-performance signal transmission cable
CN112080084A (en) Flame-retardant insulating sheath material
CN111875902A (en) PVC cable material
CN112521675A (en) Insulating cold-resistant cable material and preparation method and application thereof
CN111223601A (en) High-temperature-resistant flame-retardant anticorrosive cable
CN1775844A (en) Low-smoke halogen-free expansion flame-retarded poly olfin electric-wire external material, insulated material and its preparing method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant