CN108899137A - Polyimide insulative cable and preparation method thereof - Google Patents
Polyimide insulative cable and preparation method thereof Download PDFInfo
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- CN108899137A CN108899137A CN201810705560.5A CN201810705560A CN108899137A CN 108899137 A CN108899137 A CN 108899137A CN 201810705560 A CN201810705560 A CN 201810705560A CN 108899137 A CN108899137 A CN 108899137A
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- insulating layer
- preparation
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- cable
- conducting wire
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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
- H01B13/10—Insulating conductors or cables by longitudinal lapping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
- H01B13/165—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying by spraying
-
- 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
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two 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
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Insulating Materials (AREA)
Abstract
The present invention relates to cables, specifically, disclose a kind of polyimide insulative cable and preparation method thereof.The cable insulation of this method preparation not only has good insulation effect, and, it can guarantee that cable is bent, under the applying working condition of dragging in long-time, insulating layer will not slide cracking, guarantee stable insulation, moreover, the insulating layer high temperature resistant, matter are soft, light, resistance to water-wet is highly suitable for the features field of cables such as aerospace.In addition, the method for the cable insulation is simple, the preparation that the cable insulation can be realized using high equipment is not needed, the popularization and application of method are especially advantageous for.
Description
Technical field
The present invention relates to cables, and in particular, to polyimide insulative cable and preparation method thereof.
Background technique
Cable has power cable, control cable, compensating cable, shielded cable, high-temperature cable, computer cable, signal electricity
Cable, coaxial cable, fire-resisting cable, cable for ship, mine cable, aluminium alloy cable etc..They are led by sub-thread or multiply
Line and insulating layer composition, for connecting circuit, electric appliance etc..As the electricity consumption of the mankind aggravates, cable is widely used, electricity
Cable inner conductor is easy heat production, and the bad cable of material is easy to cause fire, thus the design of the internal structure of cable and its interior
The utilization of portion's material has been largely fixed the security performance of cable.Since cable needs to be bent in use, winding
Deng, it is desirable that cable is on the basis of meeting cable basic performance, it is also necessary to pliability with higher.
For Kapton because it is with superior electrical property and higher mechanical strength, density is smaller, high-low temperature resistant, resistance to
The features such as high energy electron irradiation, therefore be widely used in aerospace field, however, as pure Kapton it is wrapped made of
Electric wire haves the shortcomings that very much：Not fire-retardant, intolerant to hydrolysis, and insulating layer is difficult to remove with inner conductor, line composed by it
String arc phenomenon etc. is easy to happen in the system of road, and (so-called string arc refers to that a kind of electrical breakdown being present between two or multiple conducting wires is expanded
Show as showing as causing route serious once a route generates a breakdown, this failure can be extended to other route
Failure or even conflagration).
In the prior art in order to weaken Kapton the shortcomings that, it is compound to develop polyimides-perfluoroethylene-propylene
Film, for example, to disclose a kind of corona-resistant polyimide-perfluoroethylene-propylene compound for Chinese patent application 201310717388.2
Film, including：Film layer A is corona-resistant polyimide film, is the main structure of the laminated film；The film layer A's
Thickness is not less than the 1/3 of laminated film overall thickness；Film layer B, the nanometer containing exhaustive fluorinated ethylene propylene and filling therebetween
Inorganic filler, the film layer B are covered in at least one side of the film layer A, and thus the laminated film has two layers of knot of A-B
Structure or B-A-B three-decker；The thickness of the single film layer B is no more than the 1/2 of laminated film overall thickness.But it is above-mentioned poly-
Acid imide-perfluoroethylene-propylene laminated film although overcome it is not fire-retardant existing for Kapton, intolerant to the defect of hydrolysis,
But the polyimides-perfluoroethylene-propylene composite film preparation technology is many and diverse, higher cost.
Summary of the invention
The object of the present invention is to provide polyimide insulative cable and preparation method thereof, which overcomes conventional using poly-
Imide membrane is not fire-retardant, uses polyamides with microporous teflon membran the first insulating layer of wrapped formation intolerant to the defect of hydrolysis
Imines Transposed wind forms second insulating layer, then sprays aqueous polytetrafluoroethyldispersion solution in Kapton insulating layer, should
Method preparation cable insulation not only there is good insulation effect, moreover, can guarantee cable long-time be bent, dragging
Under applying working condition, insulating layer will not slide cracking, guarantee stable insulation, moreover, the insulating layer high temperature resistant, matter is soft,
Light, resistance to water-wet is fire-retardant, is highly suitable for the features field of cables such as aerospace.In addition, the method letter of the cable insulation
It is single, the preparation that the cable insulation can be realized using high equipment is not needed, the popularization and application of method are especially advantageous for.
To achieve the goals above, the present invention provides a kind of preparation method of polyimide insulative cable, the methods
Include the following steps：(1) with conducting wire be wrapped matrix, microporous teflon membran is covered in wrapped disk, make conducting wire pass through around
It is wrapped that packet disk inner core and microporous teflon membran form same core type, then, by microporous teflon membran helical form around
On conducting wire, and require it is smooth, uniformly without crack, to form the first insulating layer in conductive line surfaces；(2) by Kapton around
It is wrapped in the surface of the first insulating layer, and spiral turns to the lapping direction with microporous teflon membran on the contrary, forming the second insulation
Layer；(3) power of 60-80N is applied to the first insulating layer and second insulating layer in conducting wire axial direction jointly, and keeps 20-30s；
(4) the first insulating layer is sintered with second insulating layer, then sprays aqueous polytetrafluoroethyldispersion solution on second insulating layer surface,
Drying；Wherein, the conducting wire is made by the way that 17-21 root copper wire to be mutually twisted.
Preferably, the sintering process includes：The conducting wire of wrapping insulation layer is passed through into superaudio with the rate of 5-6m/min
Magnetic field, it is preferable that magnetic field is distributed as double helical form, and field supply is in 60-80A, and temperature is at 320-340 DEG C.
Preferably, the lay of lapping in step (1) is 13-15mm, and wrapped overlap rate is 50-62%.
Preferably, the wrapped overlap rate in step (1) is 50-55%.
Preferably, the lay of lapping in step (2) is 13-15mm, and wrapped overlap rate is 50-62%.
Preferably, the lay of lapping in step (2) is 13-15mm, and wrapped overlap rate is 51-53%.
Preferably, the process of spraying aqueous polytetrafluoroethyldispersion solution includes：Aqueous polytetrafluoroethyldispersion solution is injected and is sprayed
Machine, to second insulating layer surface even application, then in 75-85 DEG C of baking 12-15min.
Preferably, the axis direction of machine nozzle and the axis direction of conducting wire are sprayed in 30-60 ° of angle.
Preferably, aqueous polytetrafluoroethyldispersion solution is selected from the 3M Dyneon PTFE TF 5035Z that Minnesota Mining and Manufacturing Company provides
Aqueous solution, 3M Dyneon PTFE TF 5050Z aqueous solution, 3M Dyneon PTFE TF 5060GZ aqueous solution and 3M
One of Dyneon PTFE TF 5033Z aqueous solution or a variety of mixing.
The present invention also provides a kind of cables being prepared according to previously described method.
Through the above technical solutions, the present invention is wrapped with microporous teflon membran and Kapton bilayer, and
During wrapped, the lapping direction of first layer and the second layer is on the contrary, guarantee that wrapped conducting wire in the process is capped completely, and dragging
It drags in equal applying working conditions, first layer and the asynchronous sliding of the second layer reduce slippage, avoid the occurrence of insulation blind spot, moreover,
Axial force is applied to insulating layer, can will be wrapped during the stress elimination that accumulates, keep insulating layer more stable, and in insulating layer table
Face sprays aqueous polytetrafluoroethyldispersion solution, can effectively improve insulation effect of the insulating layer in water-wet, keeps insulation more steady
It is fixed.This method preparation cable insulation not only there is good insulation effect, moreover, can guarantee cable long-time bending,
Under the applying working condition of dragging, insulating layer will not slide cracking, guarantee stable insulation, moreover, the insulating layer high temperature resistant,
It is soft, light, flexible high, the resistance to water-wet of matter, fire-retardant, it is highly suitable for the features field of cables such as aerospace.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of preparation methods of polyimide insulative cable, the described method comprises the following steps：(1) with
Conducting wire is wrapped matrix, and microporous teflon membran is covered in wrapped disk, and conducting wire is made to pass through wrapped disk inner core and polytetrafluoroethyl-ne
It is wrapped that alkene microporous barrier forms same core type, then, by microporous teflon membran helical form on conducting wire, and requires flat
It is whole, uniformly without crack, to form the first insulating layer in conductive line surfaces；(2) by Kapton around being wrapped in the first insulating layer
Surface, and spiral turns to the lapping direction with microporous teflon membran on the contrary, forming second insulating layer；(3) in conducting wire axial direction
Direction applies the power of 60-80N to the first insulating layer and second insulating layer jointly, and keeps 20-30s；(4) by the first insulating layer with
Second insulating layer is sintered, then sprays aqueous polytetrafluoroethyldispersion solution, drying on second insulating layer surface；Wherein, described to lead
Line is made by the way that 17-21 root copper wire to be mutually twisted.
For Kapton because it is with superior electrical property and higher mechanical strength, density is smaller, high-low temperature resistant, resistance to
The features such as high energy electron irradiation, therefore be widely used in aerospace field, however, as pure Kapton it is wrapped made of
Electric wire haves the shortcomings that very much：Not fire-retardant, intolerant to hydrolysis, and insulating layer is difficult to remove with inner conductor, line composed by it
String arc phenomenon etc. is easy to happen in the system of road, and (so-called string arc refers to that a kind of electrical breakdown being present between two or multiple conducting wires is expanded
Show as showing as causing route serious once a route generates a breakdown, this failure can be extended to other route
Failure or even conflagration).
And the comprehensive performance of microporous teflon membran and have good electrical insulation, high frequency performance, proof voltage, resistance to height
It is warm and ageing-resistant, especially also there is very low dielectric constant and dielectric loss angle tangent, while not by frequency and temperature
Variation influences, and significantly reduces the decaying and loss characteristic of signal transmission, and signal strength most can achieve by force 70G, mention significantly
The high rate of signal transmission, in addition, communication cable flexibility obtained is good, humidity resistance is good, in -65 DEG C of -260 DEG C of temperature models
Enclose long-time service.
Wherein, Kapton can be bought in the market, English name (polyimide film；PI film), including it is equal
Two class of benzene-type Kapton and biphenyl polyimide film.The former is DuPont Corporation's product, trade name Kapton,
It is made by pyromellitic dianhydride and diaminodiphenyl ether.The latter is produced by company of Ube Industries Ltd., trade name Upilex, by joining
Pyromellitic dianhydride and diphenyldiamine (R type) or m-phenylene diamine (MPD) (S type) are made.
Through the above technical solutions, the present invention is wrapped with microporous teflon membran and Kapton bilayer, and
During wrapped, the lapping direction of first layer and the second layer is on the contrary, guarantee that wrapped conducting wire in the process is capped completely, and dragging
It drags in equal applying working conditions, first layer and the asynchronous sliding of the second layer reduce slippage, avoid the occurrence of insulation blind spot, moreover,
Axial force is applied to insulating layer, can will be wrapped during the stress elimination that accumulates, keep insulating layer more stable, and in insulating layer table
Face sprays aqueous polytetrafluoroethyldispersion solution, can effectively improve insulation effect of the insulating layer in water-wet, keeps insulation more steady
It is fixed.This method preparation cable insulation not only there is good insulation effect, moreover, can guarantee cable long-time bending,
Under the applying working condition of dragging, insulating layer will not slide cracking, guarantee stable insulation, moreover, the insulating layer high temperature resistant,
It is soft, light, flexible high, the resistance to water-wet of matter, fire-retardant, it is highly suitable for the features field of cables such as aerospace.Conducting wire is by by 17-21
Root copper wire is mutually twisted the overall flexibility for being made and ensure that conductor, and electric property and transmission performance also can be improved.
Wherein, the conducting wire can be exposed copper wire, be also possible to be coated the copper such as shielded layer, water barrier
Line is not required in the present invention.
Preferably, the sintering process includes：The conducting wire of wrapping insulation layer is passed through into superaudio with the rate of 5-6m/min
Magnetic field, it is preferable that magnetic field is distributed as double helical form, and field supply is in 60-80A, and temperature is at 320-340 DEG C.In the case,
Kapton and microporous teflon membran can be sintered together, improve the compactness of insulating layer.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that step (1)
In lay of lapping be 13-15mm, wrapped overlap rate be 50-62%.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that step (1)
In wrapped overlap rate be 50-55%.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that step (2)
In lay of lapping be 13-15mm, wrapped overlap rate be 50-62%.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that step (2)
In lay of lapping be 13-15mm, wrapped overlap rate be 51-53%.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that spraying poly- four
The process of vinyl fluoride aqueous solution includes：Aqueous polytetrafluoroethyldispersion solution is injected into flush coater, it is uniform to second insulating layer surface
Spraying, then in 75-85 DEG C of baking 12-15min.The defect that can effectively overcome polyimides not resistant to water in this way.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that flush coater spray
The axis direction of mouth and the axis direction of conducting wire are in 30-60 ° of angle.Aqueous polytetrafluoroethyldispersion solution can effectively be sprayed into this way around
At packet interface, the sealing effect of wrapped interface is improved, improves the insulation performance of cable.
In a kind of preferred embodiment of the present invention, in order to improve the insulation effect of insulating layer, it is preferable that polytetrafluoroethyl-ne
Alkene aqueous solution is selected from 3M Dyneon PTFE TF 5035Z aqueous solution, the 3M Dyneon PTFE that Minnesota Mining and Manufacturing Company provides
TF 5050Z aqueous solution, 3M Dyneon PTFE TF5060GZ aqueous solution and 3M Dyneon PTFE TF 5033Z are aqueous
One of solution or a variety of mixing.
The present invention also provides a kind of cables being prepared according to previously described method.
Through the above technical solutions, the present invention is wrapped with microporous teflon membran and Kapton bilayer, and
During wrapped, the lapping direction of first layer and the second layer is on the contrary, guarantee that wrapped conducting wire in the process is capped completely, and dragging
It drags in equal applying working conditions, first layer and the asynchronous sliding of the second layer reduce slippage, avoid the occurrence of insulation blind spot, moreover,
Axial force is applied to insulating layer, can will be wrapped during the stress elimination that accumulates, keep insulating layer more stable, and in insulating layer table
Face sprays aqueous polytetrafluoroethyldispersion solution, can effectively improve insulation effect of the insulating layer in water-wet, keeps insulation more steady
It is fixed.This method preparation cable insulation not only there is good insulation effect, moreover, can guarantee cable long-time bending,
Under the applying working condition of dragging, insulating layer will not slide cracking, guarantee stable insulation, moreover, the insulating layer high temperature resistant,
It is soft, light, flexible high, the resistance to water-wet of matter, fire-retardant, it is highly suitable for the features field of cables such as aerospace.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of preparation method of polyimide insulative cable, which is characterized in that the preparation method comprises the following steps：
(1) with conducting wire be wrapped matrix, microporous teflon membran is covered in wrapped disk, make conducting wire pass through wrapped disk inner core with
It is wrapped that microporous teflon membran forms same core type, then, by microporous teflon membran helical form on conducting wire, and
It is required that it is smooth, uniformly without crack, to form the first insulating layer in conductive line surfaces；
(2) by Kapton around the surface for being wrapped in the first insulating layer, and spiral turn to microporous teflon membran around
Wrap contrary, formation second insulating layer；
(3) power of 60-80N is applied to the first insulating layer and second insulating layer in conducting wire axial direction jointly, and keeps 20-30s；
(4) the first insulating layer is sintered with second insulating layer, then sprays aqueous polytetrafluoroethyldispersion on second insulating layer surface
Solution drying；
Wherein, the conducting wire is made by the way that 17-21 root copper wire to be mutually twisted.
2. preparation method according to claim 2, which is characterized in that the sintering process includes：
The conducting wire of wrapping insulation layer is passed through into superaudio magnetic field with the rate of 5-6m/min, which is characterized in that magnetic field is distributed as
Double helical form, field supply is in 60-80A, and temperature is at 320-340 DEG C.
3. preparation method according to claim 2, which is characterized in that the lay of lapping in step (1) is 13-15mm, around
Packet overlap rate is 50-62%.
4. according to the method described in claim 3, it is characterized in that, the wrapped overlap rate in step (1) is 50-55%.
5. preparation method according to claim 2, which is characterized in that the lay of lapping in step (2) is 13-15mm, around
Packet overlap rate is 50-62%.
6. preparation method according to claim 5, which is characterized in that the lay of lapping in step (2) is 13-15mm, around
Packet overlap rate is 51-53%.
7. preparation method according to claim 1 to 6, which is characterized in that spraying aqueous polytetrafluoroethyldispersion solution
Process include：
Aqueous polytetrafluoroethyldispersion solution is injected into flush coater, to second insulating layer surface even application, is then dried in 75-85 DEG C
12-15min。
8. preparation method according to claim 7, which is characterized in that spray the axis direction of machine nozzle and the axis of conducting wire
Direction is in 30-60 ° of angle.
9. preparation method according to claim 7, which is characterized in that aqueous polytetrafluoroethyldispersion solution is selected from Minnesota Mining and Manufacturing Company
3M Dyneon PTFE TF 5035Z aqueous solution, the 3M Dyneon PTFE TF 5050Z aqueous solution, 3M of offer
One of Dyneon PTFE TF 5060GZ aqueous solution and 3M Dyneon PTFE TF 5033Z aqueous solution are a variety of
Mixing.
10. the polyimide insulative cable that -9 described in any item methods are prepared according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705560.5A CN108899137A (en) | 2018-07-02 | 2018-07-02 | Polyimide insulative cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705560.5A CN108899137A (en) | 2018-07-02 | 2018-07-02 | Polyimide insulative cable and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108899137A true CN108899137A (en) | 2018-11-27 |
Family
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| CN201810705560.5A Pending CN108899137A (en) | 2018-07-02 | 2018-07-02 | Polyimide insulative cable and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051082A (en) * | 2014-06-06 | 2014-09-17 | 浙江天马线缆有限公司 | Production process for double-layer polyester glass fiber lapped and sintered electromagnetic wire |
| CN205122228U (en) * | 2015-09-29 | 2016-03-30 | 上海市凌桥环保设备厂有限公司 | Cable |
| CN107910107A (en) * | 2017-11-03 | 2018-04-13 | 芜湖航天特种电缆厂股份有限公司 | Aerospace high-temperature resistant super-soft electric wire and preparation method thereof |
| CN107945995A (en) * | 2017-11-26 | 2018-04-20 | 安徽宏源特种电缆股份有限公司 | A kind of seamless winding lead of polyimide composite insulated |
-
2018
- 2018-07-02 CN CN201810705560.5A patent/CN108899137A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051082A (en) * | 2014-06-06 | 2014-09-17 | 浙江天马线缆有限公司 | Production process for double-layer polyester glass fiber lapped and sintered electromagnetic wire |
| CN205122228U (en) * | 2015-09-29 | 2016-03-30 | 上海市凌桥环保设备厂有限公司 | Cable |
| CN107910107A (en) * | 2017-11-03 | 2018-04-13 | 芜湖航天特种电缆厂股份有限公司 | Aerospace high-temperature resistant super-soft electric wire and preparation method thereof |
| CN107945995A (en) * | 2017-11-26 | 2018-04-20 | 安徽宏源特种电缆股份有限公司 | A kind of seamless winding lead of polyimide composite insulated |
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Application publication date: 20181127 |