CN105427921A - High temperature and high voltage resistant cable - Google Patents

High temperature and high voltage resistant cable Download PDF

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Publication number
CN105427921A
CN105427921A CN201510982276.9A CN201510982276A CN105427921A CN 105427921 A CN105427921 A CN 105427921A CN 201510982276 A CN201510982276 A CN 201510982276A CN 105427921 A CN105427921 A CN 105427921A
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CN
China
Prior art keywords
parts
cable
high temperature
high voltage
temperature resistant
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.)
Pending
Application number
CN201510982276.9A
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Chinese (zh)
Inventor
周建栋
严智权
颜亮利
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.)
GUANGDONG ZHONGDE CABLE CO Ltd
Original Assignee
GUANGDONG ZHONGDE CABLE 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
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Priority to CN201510982276.9A priority Critical patent/CN105427921A/en
Publication of CN105427921A publication Critical patent/CN105427921A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/04Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1835Sheaths comprising abrasive charges
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/295Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/024Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire

Abstract

The invention belongs to the field of cables, and particularly relates to a high temperature and high voltage resistant cable. The cable comprises a conductor and a sheath layer externally wrapping the conductor, the sheath layer is orderly composed of an insulating layer, a mica belting layer, a low-smoke halogen-free flame retardant polyolefin inner jacket, a woven shielding layer, a low-smoke halogen-free flame retardant polyolefin outer jacket and an outer sheath from inside to outside; material of the insulating layer and material of the outer sheath both are modified fluoroplastic for cables, and the modified fluoroplastic for cables comprises the following constituents in parts by weight: 60-80 parts of polytetrafluoroethylene, 10-20 parts of wear-resistant agent, 5-10 parts of fire retardant, 7-16 parts of plasticizer, 5-9 parts of filler, 1-3 parts of antioxidant, 1-3 parts of paraffin oil, 0.1-0.2 parts of ratproof master batch and 0.1-0.2 parts of temite preventing master batch. The structure above can perform multi-angle protection for the cable, and can effectively reduce influence of high temperature and high voltage generated when conducting the conductor or outside severe environment on service life of the cable.

Description

High temperature resistant high voltage withstanding cable
Technical field
The invention belongs to field of cables, particularly high temperature resistant high voltage withstanding cable.
Background technology
Along with the develop rapidly of China's economy, the field such as subway, nuclear power station, optoelectronic communication of China develops at a speed unheard of before, the consumption of electricity also increases rapidly thereupon, and all kinds of big power station also arises at the historic moment, and the performance of power transmission cable also accepts unprecedented test.For the conduct electrical energy field of superhigh pressure; particularly nuclear power field; wire can produce a large amount of heats and cause cable to heat up in the course of the work; cable long-term work under this high temperature and high-tension condition of traditional material is easily aging and ftracture; after cracking, wire is by outside exposed; and Exterior cable as profit, chemicals burn into biology bites etc., and also the moment damages the protective layer of cable to adverse circumstances, this causes major safety risks to the life of people and property.
Summary of the invention
The object of this invention is to provide a kind of can under high temperature, high voltage and adverse circumstances the high temperature resistant high voltage withstanding cable of Long-Time Service.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
High temperature resistant high voltage withstanding cable, comprise conductor and be wrapped in the restrictive coating outside conductor, restrictive coating comprises the insulating barrier, mica wrapping tape layer, low smoke halogen-free flame-retardant polyolefin sheath, woven shield, low smoke halogen-free flame-retardant polyolefin outer jacket, the oversheath that stack gradually from inside to outside; The material of insulating barrier and oversheath is cable modification fluoroplastics; Cable modification fluoroplastics comprise the component of following weight portion: polytetrafluoroethylene 60 ~ 80 parts, anti-wear agent 10 ~ 20 parts, fire retardant 5 ~ 10 parts, 7 ~ 16 parts, plasticizer, filler 5 ~ 9 parts, antioxidant 1 ~ 3 part, paraffin oil 1 ~ 3 part, protection against rodents masterbatch 0.1 ~ 0.2 part, termite-proof masterbatch 0.1 ~ 0.2 part.
Wherein, anti-wear agent is molybdenum bisuphide; Fire retardant comprises the component of following weight portion: magnesium hydroxide 2 ~ 4 parts, trioctyl phosphate 3 ~ 6 parts; Plasticizer comprises the component of following weight portion: long glass fiber 3 ~ 6 parts, di-n-octyl sebacate 4 ~ 10 parts; Filler is calcium carbide; Antioxidant is bisphenol-A.
Wherein, cable modification fluoroplastics comprise the component of following weight portion: polytetrafluoroethylene 70 parts, molybdenum bisuphide 15 parts, magnesium hydroxide 4 parts, trioctyl phosphate 4 parts, long glass fiber 5 parts, di-n-octyl sebacate 7 parts, 7 parts, calcium carbide, bisphenol-A 2 parts, paraffin oil 2 parts, protection against rodents masterbatch 0.1 part, termite-proof masterbatch 0.1 part.
Wherein, conductor is high purity oxygen free copper bar.
Wherein, mica wrapping tape layer is composited by gold mica tape and synthetic mica tape.
Wherein, mica wrapping tape layer adopts the wrapped insulating barrier of vertical bag.
Wherein, the copper-clad magnesium-aluminum alloy line that woven shield is 0.1mm ~ 0.2mm by diameter is worked out.
Wherein, the copper volume of copper-clad magnesium-aluminum alloy line accounts for 20% ~ 40% of copper-clad magnesium-aluminum alloy line volume.
Compared with prior art, the invention has the beneficial effects as follows:
High temperature resistant high voltage withstanding cable of the present invention, innermost layer and the outermost layer of its parcel wire are all set to cable modification fluoroplastics, the matrix of these cable modification fluoroplastics is polytetrafluoroethylene, the high temperature resistant grade of polytetrafluoroethylene reaches 260 DEG C, cable is made to have good heat-resisting quantity, and polytetrafluoroethylene has self-extinguishment, once ignition of cable also can stop flame spread.These cable modification fluoroplastics are added with anti-wear agent, considerably increase the abrasion resistance of oversheath; Be added with fire retardant, increase the anti-flammability of insulating barrier and oversheath further; Be added with antioxidant, increase the useful life of the oversheath of cable; Add paraffin oil mainly improve the ageing resistance of modification fluoroplastics and increase pliability, improve the anti-torsion ability of insulating barrier and oversheath, and the physical property of insulating barrier and oversheath can not be affected; Be added with protection against rodents masterbatch and termite-proof masterbatch in addition, bite to prevent mouse or termite moth wear cable.
In addition, the mica tape of this cable parcel can improve the insulation property of cable and high voltage withstanding performance; Inside and outside sheath can increase the intensity of cable; Woven shield can play the effect of ground protection, and by electric current produce electromagnetic-field-shielded in cable.
To sum up, said structure multi-angle can protect cable, the impact that the adverse circumstances that effectively can reduce high temperature high voltage or the outside produced when being energized from conductor produced the useful life of cable.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention, in the accompanying drawings:
Fig. 1 is the structural representation of high temperature resistant high voltage withstanding cable of the present invention.
Reference numeral comprises:
1---oxygen-free copper bar;
2---insulating barrier;
3---mica wrapping tape layer;
4---low smoke halogen-free flame-retardant polyolefin sheath;
5---woven shield;
6---low smoke halogen-free flame-retardant polyolefin outer jacket;
7---oversheath.
Embodiment
Embodiment 1
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
High temperature resistant high voltage withstanding cable of the present invention, the restrictive coating comprising conductor (i.e. oxygen-free copper bar 1) and be wrapped in outside conductor, this restrictive coating is followed successively by insulating barrier 2, mica wrapping tape layer 3, low smoke halogen-free flame-retardant polyolefin sheath 4, woven shield 5, low smoke halogen-free flame-retardant polyolefin outer jacket 6, oversheath 7 from inside to outside, and insulating barrier 2 is cable modification fluoroplastics with the material of oversheath 7.
In the present embodiment, the composition of cable modification fluoroplastics is polytetrafluoroethylene 60 parts, molybdenum bisuphide 10 parts, magnesium hydroxide 2 parts, trioctyl phosphate 3 parts, long glass fiber 3 parts, di-n-octyl sebacate 4 parts, 5 parts, calcium carbide, bisphenol-A 1 part, paraffin oil 1 part, protection against rodents masterbatch 0.1 part, protection against rodents masterbatch 0.1 part.The matrix of these cable modification fluoroplastics is polytetrafluoroethylene, and the high temperature resistant grade of polytetrafluoroethylene reaches 260 DEG C, make cable have good heat-resisting quantity, and polytetrafluoroethylene has self-extinguishment, once ignition of cable also can stop flame spread; Polytetrafluoroethylene has the chemical stability of height, and the corrosion of its common strong acid, highly basic or hydrogen-oxygen voltinism chemicals that almost ability is all, also have resistant to elevated temperatures feature, it is a kind of desirable anticorrosion grease proofing exotic material simultaneously.These modification fluoroplastics are added with molybdenum bisuphide as anti-wear agent, considerably increase the abrasion resistance of oversheath; Be added with magnesium hydroxide and trioctyl phosphate as fire retardant, increase the anti-flammability of insulating barrier and oversheath further; Long glass fiber and di-n-octyl sebacate are as plasticizer, and calcium carbide is as filler; Be added with bisphenol-A as antioxidant, increase the useful life of the oversheath of cable; Add paraffin oil mainly improve the ageing resistance of fluoroplastics and increase pliability, improve the anti-torsion ability of insulating barrier and oversheath, and the physical property of insulating barrier and oversheath can not be affected; Be added with protection against rodents masterbatch and protection against rodents masterbatch in addition, bite to prevent mouse or termite moth wear cable, above-mentioned protection against rodents and termite-proof masterbatch provide by Dongguan City Liang Susemu Science and Technology Ltd..
In the present embodiment, conductor is high purity oxygen free copper bar 1, and its resistivity is little, can reduce caloric value.
In the present embodiment, mica wrapping tape layer 3 is composited by gold mica tape and synthetic mica tape.Gold mica tape has good fire resistance, resistance to acids and bases and withstands corona, radiation-resistant characteristic, and has fine flexibility and hot strength, has held the cable of gold mica tape, can long-term work and not puncturing under the high-tension condition of high temperature; And synthetic mica tape possesses the advantage of gold mica tape simultaneously, its thermal endurance class is high, can reach the fire-resistant level of A level (950 DEG C ~ 1000 DEG C); These two kinds of mica tapes are combined into double-deck mica tape, can reach high temperature resistant and high voltage withstanding requirement.Mica wrapping tape layer 3 is vertical to be wrapped in outside insulating barrier 2, adopt the mode of vertical bag can reduce the overlap of mica wrapping tape, save material, also make whole cable thickness consistent, can prevent because the projection that produces of mica tape overlap collides with other places in transportation, the oversheath of damage cable.
In the present embodiment, woven shield 5 adopts diameter to be that the copper-clad magnesium-aluminum alloy line of 0.1mm ~ 0.2mm is worked out, and the copper volume of this kind of copper-clad magnesium-aluminum alloy line accounts for 20% ~ 40% of copper-clad magnesium-aluminum alloy line volume.In the present embodiment, the diameter of copper-clad magnesium-aluminum alloy line is 0.15mm, copper volume accounts for 30% of copper-clad magnesium-aluminum alloy line volume, compared to the copper-clad magnesium-aluminum alloy line that common copper volume accounting is 15%, this kind of alloy wire adds the volume ratio of copper, makes alloy wire have lower resistivity, also improves the tensile strength of alloy wire simultaneously, use the woven shield shield effectiveness of this kind of alloy wire establishment good, and improve the tensile strength of cable.
Embodiment 2
The embodiment 2 of high temperature resistant high voltage withstanding cable of the present invention, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is that the composition of cable modification fluoroplastics is polytetrafluoroethylene 80 parts, molybdenum bisuphide 20 parts, magnesium hydroxide 4 parts, trioctyl phosphate 6 parts, long glass fiber 6 parts, di-n-octyl sebacate 10 parts, 9 parts, calcium carbide, bis-phenol 3 parts, paraffin oil 3 parts, protection against rodents masterbatch 0.2 part, protection against rodents masterbatch 0.2 part.
Embodiment 3
The embodiment 3 of high temperature resistant high voltage withstanding cable of the present invention, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is that the composition of cable modification fluoroplastics is polytetrafluoroethylene 70 parts, molybdenum bisuphide 15 parts, magnesium hydroxide 4 parts, trioctyl phosphate 4 parts, long glass fiber 5 parts, di-n-octyl sebacate 7 parts, 7 parts, calcium carbide, bisphenol-A 2 parts, paraffin oil 2 parts, protection against rodents masterbatch 0.1 part, termite-proof masterbatch 0.1 part.
The experimental data of above-mentioned three embodiments is in table one.
High temperature resistant high voltage withstanding cable of the present invention, its integrated performance index is as follows after tested: insulation tensile strength is 25.5MPa; Insulation elongation at break is 226%; Test 168 hours under the environment of 180 DEG C, after ageing of insulation, tensile strength is 23.9MPa, and after ageing of insulation, percentage elongation is 215%; When 136 DEG C, sheath caloric deformation rate is 35%; The high temperature impact carried out under 180 DEG C of environment 1 hour can keep cable not ftracture; And fire resistance is by IEC60332-1 standard.
To sum up, said structure multi-angle can protect cable, effectively can reduce the impact that high temperature, high voltage or adverse circumstances produced the useful life of cable.
Last it is noted that these are only the preferred embodiments of the present invention; be not limited to the present invention; although with reference to embodiment to invention has been detailed description; for a person skilled in the art; it still can be modified to the technical scheme described in foregoing embodiments; or equivalent replacement is carried out to wherein portion of techniques feature; but it is within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Table one
Composition (part) Embodiment 1 Embodiment 2 Embodiment 3
Polytetrafluoroethylene 60 80 70
Molybdenum bisuphide 10 20 15
Magnesium hydroxide 2 4 4
Trioctyl phosphate 3 6 4
Long glass fiber 3 6 5
Di-n-octyl sebacate 4 10 7
Calcium carbide 5 9 7
Bis-phenol 1 3 2
Paraffin oil 1 3 2
Protection against rodents masterbatch 0.1 0.2 0.1
Termite-proof masterbatch 0.1 0.2 0.1
Test event
Insulate during work specific insulation 162*10 13Ω·m 157*10 13Ω·m 158*10 13Ω·m
Insulation tensile strength 26.3MPa 24.1MPa 25.5MPa
Insulation elongation at break 233% 220% 226%
Tensile strength after ageing of insulation 24.1MPa 23.6MPa 23.9MPa
Elongation at break after ageing of insulation 221% 203% 215%
Sheath thermal deformation (136 DEG C) 37% 34% 35%
High temperature impact (180 DEG C, 1h) Do not ftracture Do not ftracture Do not ftracture
Fire resistance Pass through IEC60332-1 Pass through IEC60332-1 Pass through IEC60332-1
Remarks: aging condition for carry out 168h at 180 DEG C, and simulation outdoor test adopts UL1581 standard.

Claims (8)

1. high temperature resistant high voltage withstanding cable, comprise conductor and be wrapped in the restrictive coating outside described conductor, it is characterized in that: described restrictive coating comprises the insulating barrier, mica wrapping tape layer, low smoke halogen-free flame-retardant polyolefin sheath, woven shield, low smoke halogen-free flame-retardant polyolefin outer jacket, the oversheath that stack gradually from inside to outside;
The material of described insulating barrier and described oversheath is cable modification fluoroplastics;
Described cable modification fluoroplastics comprise the component of following weight portion: polytetrafluoroethylene 60 ~ 80 parts, anti-wear agent 10 ~ 20 parts, fire retardant 5 ~ 10 parts, 7 ~ 16 parts, plasticizer, filler 5 ~ 9 parts, antioxidant 1 ~ 3 part, paraffin oil 1 ~ 3 part, protection against rodents masterbatch 0.1 ~ 0.2 part, termite-proof masterbatch 0.1 ~ 0.2 part.
2. high temperature resistant high voltage withstanding cable according to claim 1, is characterized in that:
Described anti-wear agent is molybdenum bisuphide;
Described fire retardant comprises the component of following weight portion: magnesium hydroxide 2 ~ 4 parts, trioctyl phosphate 3 ~ 6 parts;
Described plasticizer comprises the component of following weight portion: long glass fiber 3 ~ 6 parts, di-n-octyl sebacate 4 ~ 10 parts;
Described filler is calcium carbide;
Described antioxidant is bisphenol-A.
3. high temperature resistant high voltage withstanding cable according to claim 2, it is characterized in that: described cable modification fluoroplastics comprise the component of following weight portion: polytetrafluoroethylene 70 parts, molybdenum bisuphide 15 parts, magnesium hydroxide 4 parts, trioctyl phosphate 4 parts, long glass fiber 5 parts, di-n-octyl sebacate 7 parts, 7 parts, calcium carbide, bisphenol-A 2 parts, paraffin oil 2 parts, protection against rodents masterbatch 0.1 part, termite-proof masterbatch 0.1 part.
4. high temperature resistant high voltage withstanding cable according to claim 1, is characterized in that: described conductor is high purity oxygen free copper bar.
5. high temperature resistant high voltage withstanding cable according to claim 1, is characterized in that: described mica wrapping tape layer is composited by gold mica tape and synthetic mica tape.
6. high temperature resistant high voltage withstanding cable according to claim 1, is characterized in that: described mica wrapping tape layer adopts insulating barrier described in vertical wrapped of wrapping.
7. high temperature resistant high voltage withstanding cable according to claim 1, is characterized in that: the copper-clad magnesium-aluminum alloy line that described woven shield is 0.1mm ~ 0.2mm by diameter is worked out.
8. high temperature resistant high voltage withstanding cable according to claim 7, is characterized in that: the copper volume of described copper-clad magnesium-aluminum alloy line accounts for 20% ~ 40% of described copper-clad magnesium-aluminum alloy line volume.
CN201510982276.9A 2015-12-22 2015-12-22 High temperature and high voltage resistant cable Pending CN105427921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201510982276.9A CN105427921A (en) 2015-12-22 2015-12-22 High temperature and high voltage resistant cable

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CN105427921A true CN105427921A (en) 2016-03-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3050066A1 (en) * 2016-04-11 2017-10-13 Nexans ELECTRICAL CABLE WITH ENHANCED GALVANIC CORROSION RESISTANCE
CN109867887A (en) * 2017-12-01 2019-06-11 天津市川浩塑料制品有限公司 A kind of insulating material of radio frequency coaxial-cable
CN110993192A (en) * 2019-12-17 2020-04-10 浙江正导电缆有限公司 Method for manufacturing fire-resistant cable
CN113652044A (en) * 2021-09-17 2021-11-16 温州市电线二厂 Halogen-free low-smoke flame-retardant wire and cable and preparation method thereof

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3050066A1 (en) * 2016-04-11 2017-10-13 Nexans ELECTRICAL CABLE WITH ENHANCED GALVANIC CORROSION RESISTANCE
WO2017178734A1 (en) * 2016-04-11 2017-10-19 Nexans Electrical cable with improved resistance to galvanic corrosion
US10734130B2 (en) 2016-04-11 2020-08-04 Nexans Electrical cable with improved resistance to galvanic corrosion
CN109867887A (en) * 2017-12-01 2019-06-11 天津市川浩塑料制品有限公司 A kind of insulating material of radio frequency coaxial-cable
CN110993192A (en) * 2019-12-17 2020-04-10 浙江正导电缆有限公司 Method for manufacturing fire-resistant cable
WO2021120565A1 (en) * 2019-12-17 2021-06-24 浙江正导电缆有限公司 Fire resistant cable manufacturing method
CN113652044A (en) * 2021-09-17 2021-11-16 温州市电线二厂 Halogen-free low-smoke flame-retardant wire and cable and preparation method thereof

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Application publication date: 20160323