CN113314269B - High-wear-resistance thin-wall insulated cable for rail transit vehicle and preparation method thereof - Google Patents
High-wear-resistance thin-wall insulated cable for rail transit vehicle and preparation method thereof Download PDFInfo
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- CN113314269B CN113314269B CN202110558903.1A CN202110558903A CN113314269B CN 113314269 B CN113314269 B CN 113314269B CN 202110558903 A CN202110558903 A CN 202110558903A CN 113314269 B CN113314269 B CN 113314269B
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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
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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
- H01B13/06—Insulating conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/306—Polyimides or polyesterimides
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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
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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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
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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
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Abstract
The invention provides a high-wear-resistance thin-wall insulated cable for rail transit vehicles and a preparation method thereof, wherein the preparation method of the high-wear-resistance thin-wall insulated cable for rail transit vehicles comprises a radiation crosslinking step to form a crosslinked polyolefin insulating layer, and the process conditions of the radiation crosslinking step are determined based on a pre-obtained relation curve between the radiation dose under low-energy radiation and the thermal elongation property of a product. According to the invention, through the improvement of the irradiation crosslinking step in the preparation process of the thin-wall insulated cable, the design of the coating layer and the like, on the premise of meeting the heat-resistant and environment-resistant performances, the wear-resistant performance of the cable is enhanced, the reliability of the use performance of the cable is improved, the cable is suitable for intensive laying in a limited idle and narrow space, and the requirement of the installation performance of the cable, which is improved by the continuous upgrading of a vehicle type of a user, is met.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a thin-wall insulated cable for a high-abrasion-resistance rail transit vehicle and a preparation method thereof.
Background
The thin-wall insulated cable for the rail transit vehicle is particularly suitable for a power supply control system of an internal power distribution cabinet of a locomotive vehicle with strict environmental requirements such as relative tightness, personnel concentration and the like of high-speed and ultrahigh-speed locomotive vehicles. The cable is generally made of a tinned soft copper conductor and a halogen-free low-smoke flame-retardant insulating material by using a thin-wall manufacturing technology, has the characteristics of small volume, light weight, heat resistance, cold resistance and the like, can effectively limit the spread of fire and the release of smoke during fire, and avoids danger to personnel.
At present, the insulation materials of the thin-wall cable with special fireproof performance for the rail transit vehicles on the market mainly comprise PE, TPE and PEEK materials. However, various insulating materials have their limitations: the PE material has more flexibility and poorer tensile property; the TPE insulating material has poor long-term heat resistance parameter index, unsatisfactory heat dissipation condition after being densely laid in a narrow space and short service life, and is not suitable for being used as thin-wall cable insulation; the PEEK insulating material is expensive, has rich and excessive performance indexes, and is not suitable for being widely popularized in thin-wall insulating cables. The XLPO (cross-linked polyolefin) insulating material has low tolerance of performance indexes, but the electrical performance and the mechanical physical performance of the XLPO insulating material can meet the standard requirements, and the heat resistance evaluation result shows that the XLPO insulating material has good long-term heat resistance parameter indexes, and is an ideal insulating material for thin-wall insulated cables at proper price, and is most used at present.
However, in the era of big data and internet, the design and manufacture of rail transit vehicles gradually develop towards intellectualization and automation, the number of vehicle-mounted equipment is increased continuously, and the using amount of control cables is also obviously increased, so that in a limited and even narrow vehicle body space, on the premise of ensuring the heat resistance of thin-wall irradiation cross-linked polyolefin insulated cables, the requirement of higher wear resistance is provided for laid control cables, so as to improve the reliability of mutual friction between cables, equipment bodies or vehicle bodies in the process of vehicle wiring and operation vibration.
The crosslinking degree of the existing thin-wall radiation crosslinking polyolefin insulated cable is influenced by factors such as equipment energy, radiation dose and the like, the product crosslinking degree is generally evaluated by adopting a thermal extension index (according to the standard of European Union EN50306 thin-wall insulated control cable for rail transit vehicles with special fireproof performance), but the problem of cable excessive crosslinking caused by overhigh radiation energy easily occurs to a small-sized thin-wall cable, the insulating molecular structure of the excessively crosslinked cable is decomposed, the wear resistance, the heat resistance and the acid and alkali grease corrosion resistance of the product are obviously reduced, and potential safety hazards are buried for the long-term reliable operation of the cable.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-wear-resistance thin-wall insulated cable for rail transit vehicles and a preparation method thereof.
The invention adopts the following technical scheme:
the invention provides a preparation method of a thin-wall insulated cable for a high-wear-resistance rail transit vehicle, which comprises a radiation crosslinking step to form a crosslinked polyolefin insulating layer, wherein the process condition of the radiation crosslinking step is determined based on a pre-obtained relation curve between the radiation dose under low-energy radiation and the thermal elongation performance of a product.
Further, the obtaining of the relationship curve between the irradiation dose and the thermal elongation property of the product comprises the following steps:
and (3) leading the extruded cable into a wire according to a 8-shaped wiring mode combined by large and small rollers, irradiating by using an electron beam with energy of 1.5-2.5MeV and beam current of 0.5-40mA, testing the thermal extension performance of the cable under different irradiation operation turns, and calculating a relation curve between the irradiation dose and the thermal extension performance of the product.
Furthermore, the conductor of the cable is formed by regularly twisting tinned monofilaments in a mode of 1+6+12+18, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%.
Further, the preparation method further comprises the step of wrapping a coating layer outside the insulating layer, wherein the coating layer is made of a graphene oxide-polyimide composite material, and the thickness of the coating layer is not more than 0.02 mm.
Further, the mass fraction of the graphene oxide in the graphene oxide-polyimide composite material is 0.1-0.3%.
Further, the coating layer is prepared in a dipping or spraying mode, and the concentricity of the coating layer is not lower than 90%.
In another aspect, the present invention further provides a thin-walled insulated cable for high wear resistance rail transit vehicles, including:
a conductor;
an insulating layer wrapping outside the conductor;
the coating layer wraps the outside of the insulating layer.
Furthermore, the insulating layer is a cross-linked polyolefin insulating material, and the thickness of the insulating layer is 0.18-0.28 mm;
the coating layer is made of graphene oxide-polyimide composite materials, and the thickness of the coating layer is not more than 0.02 mm.
Furthermore, the conductor is formed by regularly twisting tinned monofilaments in a mode of 1+6+12+18, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%.
Further, the maximum heat-resistant temperature of the thin-walled insulated cable is 180 ℃, the friction coefficient of the cable surface is not more than 0.53, and the wear rate is not more than 1.92 multiplied by 10 -5 mm 3 /(N·m)。
The invention provides a thin-wall insulated cable for a high-wear-resistance rail transit vehicle and a preparation method thereof, and the invention strengthens the wear resistance of the cable and improves the reliability of the use performance of the cable on the premise of meeting the heat-resistant and environment-resistant performances by improving the irradiation crosslinking step in the preparation process of the thin-wall insulated cable, increasing the design of a coating layer and the like, so that the cable is suitable for intensive laying in limited idle and narrow spaces, and meets the requirement of the installation performance of the cable which is improved by the continuous upgrading of vehicle models of users.
Drawings
Fig. 1 is a schematic structural diagram of a thin-walled insulated cable for a high-wear-resistance rail transit vehicle according to an embodiment of the present invention;
in the figure: 1-a conductor; 2-an insulating layer; and 3, coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.
In order to change the current situation that the laying of EN50306 series thin-wall insulated cables is limited, the requirement of the installation performance of the cables, which is improved due to the continuous upgrading of vehicle models of users, is met.
The embodiment of the invention provides a preparation method of a thin-wall insulated cable for a high-wear-resistance rail transit vehicle, which comprises a radiation crosslinking step to form a crosslinked polyolefin insulating layer, wherein the process condition of the radiation crosslinking step is determined based on a pre-obtained relation curve between the radiation dose under low-energy radiation and the thermal elongation performance of a product.
In the existing irradiation crosslinking step, the problem of excessive crosslinking of a small-sized thin-walled cable caused by overhigh irradiation energy easily occurs, so that the performance of the thin-walled insulated cable is influenced. According to the embodiment of the invention, the relation curve between the irradiation dose under low-energy irradiation and the thermal extension performance of the product is obtained firstly, and then the irradiation crosslinking process conditions are determined based on the relation curve obtained in advance, so that the irradiation process parameters can be accurately adjusted, the irradiation dose meeting the thermal extension performance can be accurately controlled even aiming at a thin-wall insulated cable with small specification, and the excessive crosslinking is effectively avoided; the production efficiency can be improved, after a relation curve between the irradiation dose and the thermal elongation performance of a product is obtained in the early stage for thin-wall insulated cables of the same specification, a specific production process can be determined by directly utilizing the relation curve in the later-stage actual production, the insulation wear resistance, heat resistance, environment resistance and other performances of the cables are improved, and the reliability of mutual friction among the cables, the equipment body or the vehicle body in the running vibration process of a vehicle is improved.
Further, the obtaining of the relationship curve between the irradiation dose and the thermal elongation property of the product comprises the following steps:
and (3) leading in the cable after extrusion molding according to an 8-shaped wiring mode combined by large and small rollers, irradiating by using an electron beam with the energy of 1.5-2.5MeV, the beam current of 0.5-40mA and the scanning width of 120cm, testing the thermal extension performance of the cable under different irradiation operation turns, and calculating a relation curve between the irradiation dose and the thermal extension performance of a product.
Furthermore, the conductor of the cable is formed by regularly twisting tinned monofilaments in a mode of 1+6+12+18, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%.
In the embodiment of the invention, the stranded structure design, the wire inlet mode and the like of the cable conductor are more critical to the radiation crosslinking effect. According to the condition design, the flexibility of the cable can be increased, the cable is not easy to deform in the irradiation process, the irradiation degree is more uniform, and the safety and the reliability of the cable during construction and vehicle operation are improved.
In order to enable the cable to be more suitable for densely laying in a small space, the preparation method of the embodiment further includes wrapping a coating layer outside the insulating layer, where the coating layer is made of a graphene oxide-polyimide composite material and has a thickness not greater than 0.02 mm.
On one hand, after graphene is subjected to oxidation treatment, the conductivity of the formed graphene oxide is reduced, and the insulating property is further improved after the graphene oxide is compounded with polyimide; on the other hand, the graphene oxide-polyimide composite coating has better wear-resistant effect, improves the surface smoothness and hardness of the cable, and further enhances the friction-reducing and wear-resistant performances of the cable, taking the EN 50306-.
Further, the mass fraction of the graphene oxide in the graphene oxide-polyimide composite material is 0.1-0.3%.
Further, the coating layer is prepared in a dipping or spraying mode, and the concentricity of the coating layer is not lower than 90%.
Example 1
The embodiment provides a thin-wall insulated cable for a high-wear-resistance rail transit vehicle, which is shown in a schematic structural diagram of fig. 1 and comprises a conductor 1, an insulating layer 2 and a coating layer 3. The conductor 1 is formed by regularly twisting tinned monofilaments in a mode of 1+6+12+18, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%. The insulating layer 2 is made of low-smoke halogen-free flame-retardant cross-linked polyolefin insulating material, wraps the outside of the conductor 1, and has the thickness of 0.2 mm. The coating layer 3 is made of graphene oxide-polyimide composite materials, wraps the insulating layer 2, and is not more than 0.02mm thick.
The embodiment also provides a preparation method of the thin-wall insulated cable for the high-wear-resistance rail transit vehicle, which comprises 6 working procedures of wire drawing, annealing, bundle stranding, extrusion molding, irradiation crosslinking and coating; the method comprises the following specific steps:
drawing: adopting a copper rod with phi 1.2mm to produce monofilaments with phi 0.1mm at minimum through a wire drawing die with gradually changed aperture in a small wire drawing machine;
and (3) annealing: after the monofilament passes through the high temperature of 580-600 ℃ in the annealing furnace, the broken crystal lattices caused by wire drawing in the monofilament can be gathered and arranged again; the annealed monofilament passes through a tin furnace at 380-400 ℃ on line, and after being subjected to eye die sizing at the tail end of the tin furnace, a molten tin layer can be uniformly coated on the surface of the monofilament; the elongation at break of the monofilament after annealing and tinning is not less than 30 percent;
bundling: the cable conductor is formed by regularly twisting a plurality of tinned monofilaments in a mode of 1+6+12+18, and the sectional area is 0.5mm 2 ～2.5mm 2 The single filament elongation delta is more than 15 percent, and the pitch-diameter ratio is 8-12. The proper compression is adopted, so that the stranded conductor has good flexibility and large curvature, the structure of the cable core is stable when the cable core is bent, the plastic deformation of the conductor cannot be caused, the flexibility and the stability of the cable core are greatly improved, the processing, the manufacturing, the installation and the laying of the electric wire and the cable are convenient, the cable autorotation problem in the 8-shaped wiring process in the irradiation process is particularly avoided, and the uniformity and the controllability of the cable irradiation are ensured;
extrusion molding: in the insulation process, an extruding machine with screw diameter phi of 35-phi 45mm, length-diameter ratio of 16-25 and compression ratio of 1-1.5 is used for production; the temperature of the insulation extrusion is controlled to be 150-220 ℃, and the insulation extrusion is immediately carried out with warm water cooling at 40 ℃ so as to avoid the problems of stress retention and insulation retraction between the conductor and the insulation layer after the insulation stripping quenching.
Irradiation crosslinking: irradiating by using an electron accelerator with the energy of 1.5-2.5MeV, the beam current of 0.5-40mA and the scanning width of 120cm, leading in the tightly twisted conductor wrapping the insulating layer in an 8-shaped wiring mode combined by large and small rollers under the irradiation of electron beams, measuring the thermal extension performance of the product at intervals, and obtaining the relation between the number of operating turns and the thermal extension performance of the product, thereby further obtaining the relation between the irradiation dose and the thermal extension performance of the product. Based on the above relation, the irradiation crosslinking process parameters of the product with the thermal extension performance up to the standard can be more accurately controlled in the embodiment, and excessive crosslinking is avoided, so that the mechanical strength of the insulating layer is improved, the scratch and abrasion resistance of the surface of the insulating layer is improved, the heat resistance is also improved, the highest thermal aging temperature is increased to 180 ℃, and the stability of the acid and alkali resistant environment performance is improved.
Coating: the insulating layer is coated with the graphene oxide-polyimide composite material with the thickness not exceeding 0.02mm in a spraying mode at the linear speed of 200m/min, and the coating layer is dried and cured at 80 ℃ in a furnace tube, so that the concentricity of the coating layer is not lower than 90%. The design of the coating layer in the embodiment improves the insulation performance and the friction reduction and wear resistance of the cable, compared with the cable without the coating layer, the number of times of scraping and abrasion resistance of the cable is increased from 150 times to 500 times on average, the insulation cut-through resistance of the cable is increased from 60N to 78N, the cut-out expansion resistance of the surface of the cable is increased from 150V to 300V after 1min, and the cut-out expansion resistance of the surface of the cable is increased from 1min to 150V after 1 min.
The cable obtained in the embodiment changes the current situation that the laying of EN50306 series thin-wall insulated cables is limited, and meets the requirement of the installation performance of the cable, which is improved due to the continuous upgrading of the vehicle type of a user. The cable strengthens the wear resistance, improves the reliability of the service performance and increases the function of densely laying in small space on the premise of meeting the heat resistance and environmental resistance. The cable can meet the use range of rated voltage 300/500V and below, has high wear resistance, is suitable for intensive laying in limited idle and narrow space, and avoids the relocation and installation caused by the fact that a large number of vehicle-mounted multifunctional equipment of the rail transit vehicle cannot be wired.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A preparation method of a thin-wall insulated cable for a high-wear-resistance rail transit vehicle comprises a radiation crosslinking step to form a crosslinked polyolefin insulating layer, and is characterized in that the process condition of the radiation crosslinking step is determined based on a pre-obtained relation curve between the radiation dose under low-energy radiation and the thermal elongation performance of a product;
the obtaining of the relation curve between the irradiation dose and the thermal elongation performance of the product comprises the following steps:
feeding the extruded cable in an 8-shaped wiring mode combined by large and small rollers, irradiating by using an electron beam with energy of 1.5-2.5MeV and beam current of 0.5-40mA, testing the thermal extension performance of the cable under different irradiation operation turns, and calculating to obtain a relation curve between the irradiation dose and the thermal extension performance of a product;
the conductor of the cable is formed by regularly twisting tinned monofilaments in a 1+6+12+18 mode, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%;
the preparation method further comprises the step of wrapping a coating layer outside the insulating layer, wherein the coating layer is made of a graphene oxide-polyimide composite material, and the thickness of the coating layer is not more than 0.02 mm; the mass fraction of the graphene oxide in the graphene oxide-polyimide composite material is 0.1-0.3%.
2. The preparation method of the high-abrasion-resistance thin-wall insulated cable for the rail transit vehicles according to claim 1, wherein the coating layer is prepared in a dipping or spraying mode, and the concentricity of the coating layer is not lower than 90%.
3. The thin-walled insulated cable for the high-abrasion rail transit vehicle prepared by the preparation method of claim 1 or 2, comprising:
a conductor; the conductor is formed by regularly twisting tinned monofilaments in a 1+6+12+18 mode, the diameter of each tinned monofilament is 0.16-0.4 mm, and the breaking elongation is not less than 15%;
an insulating layer wrapping outside the conductor; the insulating layer is made of a cross-linked polyolefin insulating material, and the thickness of the insulating layer is 0.18-0.28 mm;
the coating layer wraps the outer part of the insulating layer; the coating layer is made of graphene oxide-polyimide composite materials, and the thickness of the coating layer is not more than 0.02 mm.
4. The thin-walled insulated cable for high abrasion resistance rail transit vehicle according to claim 3, wherein the maximum heat resistant temperature of the thin-walled insulated cable is 180 ℃, the friction coefficient of the cable surface is not more than 0.53, and the abrasion rate is not more than 1.92 x 10 -5 mm 3 /(N·m)。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110558903.1A CN113314269B (en) | 2021-05-21 | 2021-05-21 | High-wear-resistance thin-wall insulated cable for rail transit vehicle and preparation method thereof |
| PCT/CN2021/108559 WO2022241946A1 (en) | 2021-05-21 | 2021-07-27 | Thin-wall insulated cable for high wear-resistance rail transit vehicle and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110558903.1A CN113314269B (en) | 2021-05-21 | 2021-05-21 | High-wear-resistance thin-wall insulated cable for rail transit vehicle and preparation method thereof |
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| CN113314269A CN113314269A (en) | 2021-08-27 |
| CN113314269B true CN113314269B (en) | 2022-07-26 |
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| CN202110558903.1A Active CN113314269B (en) | 2021-05-21 | 2021-05-21 | High-wear-resistance thin-wall insulated cable for rail transit vehicle and preparation method thereof |
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| WO (1) | WO2022241946A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4877467A (en) * | 1978-05-26 | 1989-10-31 | Northern Telecom Limited | Electrically insulated wire |
| CN202126859U (en) * | 2011-06-29 | 2012-01-25 | 福建福硕线缆有限公司 | Anti-aging cable structure |
| CN202167257U (en) * | 2011-08-31 | 2012-03-14 | 安徽华菱电缆集团有限公司 | Ultrathin cable for locomotive vehicle |
| CN103589152A (en) * | 2013-10-21 | 2014-02-19 | 江苏大学 | Preparation method for polyimide/oxidized graphene nanocomposite film |
| CN105037897A (en) * | 2015-09-02 | 2015-11-11 | 严兵 | Masterbatch used for irradiation crosslinking cable coating material and preparing method thereof |
| CN112652426A (en) * | 2019-10-12 | 2021-04-13 | 浙江兆龙互连科技股份有限公司 | Preparation process of high-speed locomotive cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133778A (en) * | 2017-12-11 | 2018-06-08 | 无锡鑫宏业特塑线缆有限公司 | A kind of wear-resisting tear-proof type high temperature resistant car high-tension cable |
-
2021
- 2021-05-21 CN CN202110558903.1A patent/CN113314269B/en active Active
- 2021-07-27 WO PCT/CN2021/108559 patent/WO2022241946A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4877467A (en) * | 1978-05-26 | 1989-10-31 | Northern Telecom Limited | Electrically insulated wire |
| CN202126859U (en) * | 2011-06-29 | 2012-01-25 | 福建福硕线缆有限公司 | Anti-aging cable structure |
| CN202167257U (en) * | 2011-08-31 | 2012-03-14 | 安徽华菱电缆集团有限公司 | Ultrathin cable for locomotive vehicle |
| CN103589152A (en) * | 2013-10-21 | 2014-02-19 | 江苏大学 | Preparation method for polyimide/oxidized graphene nanocomposite film |
| CN105037897A (en) * | 2015-09-02 | 2015-11-11 | 严兵 | Masterbatch used for irradiation crosslinking cable coating material and preparing method thereof |
| CN112652426A (en) * | 2019-10-12 | 2021-04-13 | 浙江兆龙互连科技股份有限公司 | Preparation process of high-speed locomotive cable |
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| WO2022241946A1 (en) | 2022-11-24 |
| CN113314269A (en) | 2021-08-27 |
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