CN112820450A - Wire and cable for high-temperature-resistant high-voltage thin-wall insulation railway passenger car - Google Patents
Wire and cable for high-temperature-resistant high-voltage thin-wall insulation railway passenger car Download PDFInfo
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- CN112820450A CN112820450A CN202011597142.2A CN202011597142A CN112820450A CN 112820450 A CN112820450 A CN 112820450A CN 202011597142 A CN202011597142 A CN 202011597142A CN 112820450 A CN112820450 A CN 112820450A
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- 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
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- 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
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- 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
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- 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
Abstract
The invention belongs to the technical field of wire and cable materials, in particular to a wire and cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which solves the problems of heavy overall weight, large size, low tensile strength, poor electrical property and physical and mechanical properties, poor cable safety performance and the like of the wire and cable for the railway passenger car in the prior art; the outer sheath comprises the following raw materials: polyvinyl chloride, polyester resin, sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant. The outer sheath material for the wire and cable of the railway carriage is simple and easy to obtain and prepare, and has excellent high-temperature and high-pressure resistance, flame retardance, tensile strength and elongation at break.
Description
Technical Field
The invention relates to the technical field of wire and cable materials, in particular to a wire and cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car.
Background
Wire and cable refers to materials used for power, communication and related transmission applications. With the large-scale construction of passenger dedicated lines and high-speed railways in China, the demand of wire cables for railway passenger cars is continuously expanded, and particularly the wire cables for thin-wall insulated railway passenger cars have to meet the requirement of high reliability. The wire and cable for the railway passenger car have high requirements on oil resistance, environmental resistance, electrical performance and mechanical performance. The electric wire and the electric cable for the railway passenger car operate in different environmental states for a long time, the arrangement among the electric cables is dense, the heat dissipation is poor, the environment resistance and the thermal aging phenomenon of the electric cables are serious, the line is easily ignited once the insulation aging is serious, and the service life of the electric cables is greatly reduced.
In the prior art, the wire and cable for the common railway passenger car has the defects of heavy overall weight, large size, low tensile strength, poor electrical property and physical and mechanical properties, poor cable safety performance, non-conformity with the light weight requirement of the railway passenger car and incapability of ensuring the safe operation of the railway passenger car. Moreover, the common wire and cable for the railway passenger car mostly adopt an insulating layer and a sheath layer made of halogen materials, once a fire disaster occurs, a large amount of dense smoke is generated by halogen, people are easy to suffocate, and further rescue work is difficult to carry out, and the defects and the technical problems limit the use of products and cause the potential safety operation hazard of the railway passenger car. Based on the statement, the invention provides the wire and the cable for the high-temperature-resistant high-voltage thin-wall insulated railway passenger car.
Disclosure of Invention
The invention aims to solve the problems of heavy overall weight, large size, low tensile strength, poor electrical and physical and mechanical properties, poor cable safety performance and the like of the wire cable for the railway passenger car in the prior art, and provides the wire cable for the high-temperature and high-pressure resistant thin-wall insulated railway passenger car.
The wire cable comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer; the outer sheath comprises the following raw materials in parts by weight: 30-50 parts of polyvinyl chloride, 20-30 parts of polyester resin, 3-5 parts of sodium metaphosphate, 5-10 parts of phthalate, 1-3 parts of dibutyl hydroxy toluene and 3-4 parts of flame retardant.
Preferably, the conductor is 2-28 groups of galvanized copper wires or silver-plated copper wires, and the cross-sectional area of the conductor is 0.28-2.4mm2。
Preferably, the insulating layer is prepared by uniformly mixing 25-45:4-8:12-16:1:1-1.5 of polyethylene plastic, fluoroplastic, glass fiber, tetramethyldiphenylethane and diallyl phthalate in a mass ratio and then extruding and molding.
Preferably, the wrapping layer is prepared by uniformly mixing the nitrile rubber, the mica powder, the methylethanolamine, the stearic acid and the flame retardant in a mass ratio of 30-50:15-25:2-3:3-5:1-2, and then extruding and molding.
Preferably, the flame retardant is prepared by compounding aluminum hydroxide, the bastnaesite and triethanolamine borate in a mass ratio of 4-7:1-2: 1.
Preferably, the braided layer is a braided layer of copper wire or a braided layer of steel wire.
Preferably, the outer sheath comprises the following raw materials in parts by weight: 35-45 parts of polyvinyl chloride, 22-28 parts of polyester resin, 3.5-4.5 parts of sodium metaphosphate, 6-9 parts of phthalate, 1.5-2.5 parts of butylated hydroxytoluene and 3.2-3.8 parts of flame retardant.
Preferably, the outer sheath comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 25 parts of polyester resin, 4 parts of sodium metaphosphate, 8 parts of phthalate, 2 parts of dibutyl hydroxy toluene and 3.5 parts of flame retardant.
Preferably, the outer sheath is prepared by the following method:
s1, weighing 30-50 parts of polyvinyl chloride, 20-30 parts of polyester resin, 3-5 parts of sodium metaphosphate, 5-10 parts of phthalate, 1-3 parts of dibutyl hydroxy toluene and 3-4 parts of flame retardant for later use;
s2, adding the polyvinyl chloride and the polyester resin into a high-speed mixer together, heating to 130-;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 10-18min at the temperature of 20-50 ℃ to obtain a mixed material II;
and S4, adding the mixed material II into the mixed material I, uniformly mixing at the temperature of 80-100 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material.
The invention provides a wire and cable for a high-temperature-resistant high-voltage thin-wall insulated railway passenger car, which has the following beneficial effects:
1. the invention utilizes polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate to be uniformly mixed and then extruded to form the wire and cable insulation layer material, and the conductor is coated, the insulation layer material has the characteristics of good insulation, high temperature resistance, flame retardance, no halogen, low smoke and low toxicity, meets the requirements of the wire and cable special for railway carriages on the electrical property and the mechanical property of the insulation layer material, has strong plasticity, is easy to process and extrude, and thus easily meets the requirement of thin wall, and the thickness of the obtained insulation layer is less than 0.3 mm.
2. The flame retardant is prepared by synergistic compounding of aluminum hydroxide and triethanolamine borate, and the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and the flame retardant and performing extrusion molding; the flame retardant can be well combined with the surface of the nitrile rubber, promotes regular stacking of chain segments, and further accelerates crystallization rate, and research experiments prove that when the flame retardant and the nitrile rubber are compounded and added into a nitrile rubber material, the oxygen index of the nitrile rubber can be obviously improved; the addition of the methylethanolamine and the stearic acid can greatly promote the binding capacity among the raw materials, so that the flame retardant stability, the tensile property and the wear resistance of the obtained wrapping layer are enhanced.
3. The invention also provides the outer sheath material of the wire and cable of the railway carriage and the preparation method thereof, and the outer sheath material has the advantages of simple and easily obtained raw materials, simple preparation, excellent high temperature and high pressure resistance, excellent flame retardance, excellent tensile strength and excellent elongation at break.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The invention provides a wire cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer, wherein the insulating layer is wound on the outer side of the conductor;
the conductor is 2 groups of galvanized copper wires or silver-plated copper wires, and the cross section area of the conductor is 0.28mm2；
The insulating layer is prepared by uniformly mixing polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate according to the mass ratio of 25:4:12:1:1 and then extruding and molding;
the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 30:15:2:3:1 and then extruding and molding;
the braided layer is a copper wire braided layer or a steel wire braided layer;
the outer sheath comprises the following raw materials in parts by weight: 30 parts of polyvinyl chloride, 20 parts of polyester resin, 3 parts of sodium metaphosphate, 5 parts of phthalate, 1 part of dibutyl hydroxy toluene and 3 parts of flame retardant;
the outer sheath is prepared by the following method:
s1, weighing 30 parts of polyvinyl chloride, 20 parts of polyester resin, 3 parts of sodium metaphosphate, 5 parts of phthalate, 1 part of dibutyl hydroxy toluene and 3 parts of flame retardant for later use;
s2, adding polyvinyl chloride and polyester resin into a high-speed mixer together, heating to 130 ℃, stirring and mixing uniformly at the rotating speed of 1000r/min while heating to obtain a mixed material I;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 10min at the temperature of 20 ℃ to obtain a mixed material II;
s4, adding the mixed material II into the mixed material I, uniformly mixing at the temperature of 80 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material;
the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate in a mass ratio of 4:1:1.
Example two
The invention provides a wire cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer, wherein the insulating layer is wound on the outer side of the conductor;
the conductor is 8 groups of galvanized copper wires or silver-plated copper wires, and the sectional area of the conductor is 0.8mm2；
The insulating layer is prepared by uniformly mixing polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate according to the mass ratio of 30:5:13:1:1.1 and then extruding and molding;
the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 35:18:2.5:3.5:1.2, and then extruding and molding;
the braided layer is a copper wire braided layer or a steel wire braided layer;
the outer sheath comprises the following raw materials in parts by weight: 35 parts of polyvinyl chloride, 22 parts of polyester resin, 3.5 parts of sodium metaphosphate, 6 parts of phthalate, 1.5 parts of dibutyl hydroxy toluene and 3.2 parts of flame retardant;
the outer sheath is prepared by the following method:
s1, weighing 35 parts of polyvinyl chloride, 22 parts of polyester resin, 3.5 parts of sodium metaphosphate, 6 parts of phthalate, 1.5 parts of dibutyl hydroxy toluene and 3.2 parts of flame retardant for later use;
s2, adding polyvinyl chloride and polyester resin into a high-speed mixer together, heating to 135 ℃, stirring and mixing uniformly at the rotating speed of 1100r/min while heating to obtain a mixed material I;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing at the temperature of 25 ℃ for 12min to obtain a mixed material II;
s4, adding the mixed material II into the mixed material I, uniformly mixing at 85 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material;
the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate according to the mass ratio of 4.5:1.2: 1.
EXAMPLE III
The invention provides a wire cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer, wherein the insulating layer is wound on the outer side of the conductor;
the conductor is 14 groups of galvanized copper wires or silver-plated copper wires, and the cross section area of the conductor is 1.2mm2；
The insulating layer is prepared by uniformly mixing polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate according to the mass ratio of 35:6:14:1:1.3 and then extruding and molding;
the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 40:20:2.5:4:1.5 and then extruding and molding;
the braided layer is a copper wire braided layer or a steel wire braided layer;
the outer sheath comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 25 parts of polyester resin, 4 parts of sodium metaphosphate, 8 parts of phthalate, 2 parts of dibutyl hydroxy toluene and 3.5 parts of flame retardant;
the outer sheath is prepared by the following method:
s1, weighing 40 parts of polyvinyl chloride, 25 parts of polyester resin, 4 parts of sodium metaphosphate, 8 parts of phthalate, 2 parts of dibutyl hydroxy toluene and 3.5 parts of flame retardant for later use;
s2, adding polyvinyl chloride and polyester resin into a high-speed mixer together, heating to 140 ℃, and stirring and mixing uniformly at a rotating speed of 1200r/min while heating to obtain a mixed material I;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 14min at the temperature of 35 ℃ to obtain a mixed material II;
s4, adding the mixed material II into the mixed material I, uniformly mixing at 90 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material;
the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate according to the mass ratio of 5.5:1.5: 1.
Example four
The invention provides a wire cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer, wherein the insulating layer is wound on the outer side of the conductor;
the conductor is 22 groups of galvanized copper wires or silver-plated copper wires, and the sectional area of the conductor is 1.8mm2；
The insulating layer is prepared by uniformly mixing polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate according to the mass ratio of 40:7:15:1:1.4 and then extruding and molding;
the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 45:22:2.8:4.5:1.8 and then extruding and molding;
the braided layer is a copper wire braided layer or a steel wire braided layer;
the outer sheath comprises the following raw materials in parts by weight: 45 parts of polyvinyl chloride, 28 parts of polyester resin, 4.5 parts of sodium metaphosphate, 8 parts of phthalate, 2.5 parts of dibutyl hydroxy toluene and 3.8 parts of flame retardant;
the outer sheath is prepared by the following method:
s1, weighing 45 parts of polyvinyl chloride, 28 parts of polyester resin, 4.5 parts of sodium metaphosphate, 8 parts of phthalate, 2.5 parts of dibutyl hydroxy toluene and 3.8 parts of flame retardant for later use;
s2, adding polyvinyl chloride and polyester resin into a high-speed mixer together, heating to 145 ℃, and stirring and mixing uniformly at a rotating speed of 1300r/min while heating to obtain a mixed material I;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 16min at the temperature of 40 ℃ to obtain a mixed material II;
s4, adding the mixed material II into the mixed material I, uniformly mixing at the temperature of 95 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material;
the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate according to the mass ratio of 6:1.8: 1.
EXAMPLE five
The invention provides a wire cable for a high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car, which comprises a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer, wherein the insulating layer is wound on the outer side of the conductor;
the conductor is 28 groups of galvanized copper wires or silver-plated copper wires, and the sectional area of the conductor is 2.4mm2；
The insulating layer is prepared by uniformly mixing polyethylene plastic, fluoroplastic, glass fiber, tetramethyl diphenylethane and diallyl phthalate according to the mass ratio of 45:8:16:1:1.5 and then extruding and molding;
the wrapping layer is prepared by uniformly mixing nitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 50:25:3:5:2 and then extruding and molding;
the braided layer is a copper wire braided layer or a steel wire braided layer;
the outer sheath comprises the following raw materials in parts by weight: 50 parts of polyvinyl chloride, 30 parts of polyester resin, 5 parts of sodium metaphosphate, 10 parts of phthalate, 3 parts of dibutyl hydroxy toluene and 4 parts of flame retardant;
the outer sheath is prepared by the following method:
s1, weighing 50 parts of polyvinyl chloride, 30 parts of polyester resin, 5 parts of sodium metaphosphate, 10 parts of phthalate, 3 parts of dibutyl hydroxy toluene and 4 parts of flame retardant for later use;
s2, adding polyvinyl chloride and polyester resin into a high-speed mixer together, heating to 150 ℃, and stirring and mixing uniformly at a rotating speed of 1400r/min while heating to obtain a mixed material I;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 18min at the temperature of 50 ℃ to obtain a mixed material II;
s4, adding the mixed material II into the mixed material I, uniformly mixing at the temperature of 100 ℃, and performing extrusion molding by using a double-screw extruder to obtain the material;
the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate according to the mass ratio of 7:2: 1.
The comprehensive performance of the electric wire and cable for the high-temperature and high-pressure resistant thin-wall insulated railway passenger car prepared in the first to fifth embodiments is respectively tested, and the following results are obtained:
table 1:
| examples | A | II | III | Fourthly | Five of them |
| Oxygen index (%) | 39.8 | 43.2 | 44.5 | 43.7 | 41.6 |
| Heat resistance time (h) at 125 DEG C | 20010 | 20220 | 20500 | 20350 | 20080 |
| Conductivity of insulating layer (mu S/mm) | 5.0 | 3.8 | 3.0 | 3.5 | 4.7 |
| Retention of tensile Strength by aging (158 ℃ C., 168 hours) | 1.0 | 1.2 | 1.4 | 1.3 | 1.1 |
| Retention of elongation at break after aging (158 ℃ C., 168h) | 0.9 | 1.1 | 1.2 | 1.1 | 1.0 |
| AC breakdown voltage test (kV) | 23 | 26 | 29 | 28 | 25 |
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The wire cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car is characterized by comprising a conductor, an insulating layer wound outside the conductor, a winding layer wound outside the insulating layer, a braided layer wound outside the winding layer and an outer sheath wound outside the braided layer; the outer sheath comprises the following raw materials in parts by weight: 30-50 parts of polyvinyl chloride, 20-30 parts of polyester resin, 3-5 parts of sodium metaphosphate, 5-10 parts of phthalate, 1-3 parts of dibutyl hydroxy toluene and 3-4 parts of flame retardant.
2. The electric wire and cable for high temperature and high pressure resistant thin-walled insulated railway carriage as claimed in claim 1, wherein the conductor is 2-28 groups of galvanized copper wire or silver-plated copper wire, and the cross-sectional area of the conductor is 0.28-2.4mm2。
3. The wire and cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car according to claim 1, wherein the insulating layer is prepared by uniformly mixing 25-45:4-8:12-16:1:1-1.5 by mass of polyethylene plastic, fluoroplastic, glass fiber, tetramethyldiphenylethane and diallyl phthalate, and then extruding and molding.
4. The wire and cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car according to claim 1, wherein the wrapping layer is prepared by uniformly mixing butadiene-acrylonitrile rubber, mica powder, methylethanolamine, stearic acid and a flame retardant in a mass ratio of 30-50:15-25:2-3:3-5:1-2 and then extruding and molding.
5. The wire and cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car according to claim 1 or 4, characterized in that the flame retardant is prepared by compounding aluminum hydroxide, calcium fluoride cerium ore and triethanolamine borate in a mass ratio of 4-7:1-2: 1.
6. The electric wire and cable for a high temperature and high pressure resistant thin-walled insulated railway carriage as claimed in claim 1, wherein the braided layer is a copper wire braided layer or a steel wire braided layer.
7. The electric wire and cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car according to claim 1, wherein the outer sheath comprises the following raw materials in parts by weight: 35-45 parts of polyvinyl chloride, 22-28 parts of polyester resin, 3.5-4.5 parts of sodium metaphosphate, 6-9 parts of phthalate, 1.5-2.5 parts of butylated hydroxytoluene and 3.2-3.8 parts of flame retardant.
8. The electric wire and cable for the high-temperature-resistant high-pressure-resistant thin-wall insulated railway passenger car according to claim 7, wherein the outer sheath comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 25 parts of polyester resin, 4 parts of sodium metaphosphate, 8 parts of phthalate, 2 parts of dibutyl hydroxy toluene and 3.5 parts of flame retardant.
9. The electric wire and cable for a high temperature and high pressure resistant thin-walled insulated railway carriage as claimed in claim 1, wherein the outer sheath is prepared by the following method:
s1, weighing 30-50 parts of polyvinyl chloride, 20-30 parts of polyester resin, 3-5 parts of sodium metaphosphate, 5-10 parts of phthalate, 1-3 parts of dibutyl hydroxy toluene and 3-4 parts of flame retardant for later use;
s2, adding the polyvinyl chloride and the polyester resin into a high-speed mixer together, heating to 130-;
s3, adding sodium metaphosphate, phthalate, dibutyl hydroxy toluene and a flame retardant into a mixer together, and mixing for 10-18min at the temperature of 20-50 ℃ to obtain a mixed material II;
and S4, adding the mixed material II into the mixed material I, uniformly mixing at the temperature of 80-100 ℃, and performing extrusion molding through a double-screw extruder to obtain the composite material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011597142.2A CN112820450A (en) | 2020-12-29 | 2020-12-29 | Wire and cable for high-temperature-resistant high-voltage thin-wall insulation railway passenger car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597142.2A CN112820450A (en) | 2020-12-29 | 2020-12-29 | Wire and cable for high-temperature-resistant high-voltage thin-wall insulation railway passenger car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314262A (en) * | 2021-07-09 | 2021-08-27 | 晶锋集团股份有限公司 | Cable material with steel wire braided structure and preparation method thereof |
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