CN110349697A - A kind of insulated conductor and its production technology with double layer of insulation - Google Patents
A kind of insulated conductor and its production technology with double layer of insulation Download PDFInfo
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- CN110349697A CN110349697A CN201910500187.4A CN201910500187A CN110349697A CN 110349697 A CN110349697 A CN 110349697A CN 201910500187 A CN201910500187 A CN 201910500187A CN 110349697 A CN110349697 A CN 110349697A
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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
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
-
- 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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/145—Pretreatment or after-treatment
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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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
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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
- H01B13/30—Drying; Impregnating
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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
- H01B3/44—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 vinyl resins; acrylic resins
-
- 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
- H01B7/0275—Disposition of insulation comprising one or more extruded 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
- H01B7/02—Disposition of insulation
- H01B7/0291—Disposition of insulation comprising two or more layers of insulation having different electrical properties
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Thermal Sciences (AREA)
- Insulated Conductors (AREA)
Abstract
A kind of insulated conductor with double layer of insulation of the present invention, it includes conductor and surround the insulator of the PTFE dispersion resin of the paste extruded of the conductor by pressure with coalescing；It is characterized by: wherein the insulator includes inner insulator and outer insulator；The inner insulator is PTFE dispersion resin half-feeding；The outer insulator is PTFE dispersion resin clinker.A kind of insulated conductor with double layer of insulation is all made of clinker as the insulated conductor of insulating layer with lower dielectric constant compared to conventional, improves efficiency of transmission.
Description
Technical field
The present invention relates to a kind of insulated conductor and its production technology with double layer of insulation.
Background technique
Polytetrafluoroethylene (PTFE) (PTFE) dispersion resin is used as the insulator of conducting wire for many years.But it is closed although PTFE has
The characteristic of desired high molecular weight (i.e. low-k and low loss factors), but due to its processing limitation, also use
Insulator of other polymer as conducting wire is especially used in the cable of major diameter, high-frequency coaxial transmission.
Polytetrafluoroethylene (PTFE) (PTFE) dispersion resin is that a seed type of PTFE then makes dispersion by aqueous dispersion polymerization
It flocculates and dries resulting flocculate solids to obtain dispersion resin.Because PTFE dispersion resin cannot sufficiently flow under melting condition
It moves to implement melt-processed, therefore dispersion resin is processed into product and is coated on conducting wire by extrusion, such method
Melt flows are not needed.
This pressing method is known as paste extruded, and this method is described in United States Patent (USP) 2,685,707.In paste extrusion
In, paste extrusion composition is mixed by PTFE dispersion resin and organic lubricant.The lubricant 25 DEG C viscosity extremely
It is less 0.45 centipoise, is liquid under subsequent extruding condition.PTFE absorbs lubricant, obtains dry, pressure coalescence paste
Expect extrusion composition, the PTFE dispersion resin also referred to as lubricated.Paste extrusion is usually carried out at 20~60 DEG C, in this process
In, the dispersion resin of lubrication is forced through life (green) extrudate that mold forms lubrication.Then usually at 100~250 DEG C
At a temperature of heat the life extrudate of the lubrication, so that lubricant is volatilized and removed from extrudate.In most cases, dry
Extrudate afterwards is heated to the melting temperature (usually 327~500 DEG C) for being close to or higher than PTFE, is sintered PTFE.
For it is certain there may be shielded signal transmission buildings region (such as building in or its around, tunnel
Or garage) radio bandwidth communication for, the cable that can transmit high-frequency electromagnetic wave is particularly useful.It is same in cleared area
Using this cable, but the signal level for needing accurate control that must be distributed in long range in such kind of area, without by it
The interference of its closing signal.
High frequency transmission cable requires insulator to have as minimum as possible permittivity ε T and fissipation factor tan δ, with
To desirable decay characteristics.Such as United States Patent (USP) 5, disclosed in 922,155, the dielectric constant less than about 1.8 is in accordance with need
It wants.The dielectric constant of insulating materials such as fluorochemical and polyethylene close about 2.Such as United States Patent (USP) 3,771,934 and 5,
922,155 are instructed, and stomata can be introduced in the insulating materials that melt-flowable polymer is formed to reduce dielectric constant.
In most common polymer, PTFE has minimum loss (fissipation factor).Therefore, although using melt extruded
Technology, it is easy to form fluoropolymer other polymers (such as PFA [the TFE/ perfluoro of such as polyethylene or melt-flowable
(alkyl vinyl ether) copolymer] and FEP (TFE/ hexafluoropropylene copolymer), but their the no PTFE of loss is low.
For example, in the frequency of 1MHz, it is polyethylene that the fissipation factor of PTFE, which is the half or lower of PFA,
Or the one third or lower of FEP.Nevertheless, PTFE is hardly formed major diameter conducting wire insulator, because of dry raw extrusion
Object is very difficult to remove lubricant from the PTFE dispersion resin thickness structure of paste extruded.The PTFE insulator of major diameter
Because that it needs basic PTFE dispersion resin is expensive.
With low dielectric constant and fissipation factor, in its manufacturing process only need a small amount of PTFE dispersion resin,
The PTFE insulated conductor of paste extruded will be very ideal for high-frequency cable.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of insulated conductor with double layer of insulation and its production works
Skill.
The object of the present invention is achieved like this:
Compared with prior art, the beneficial effects of the present invention are:
The present invention is in order to obtain the high-frequency attenuation characteristic of coaxial cable requirement, Jie of the insulator of PTFE dispersion resin
Electric constant must be as close possible to 1.The dielectric constant of PTFE without sintering is about 1.7, and the dielectric of sintered PTFE is normal
Number is about 2.Therefore as much as possible to use the PTFE without sintering as insulating layer, however the PTFE without sintering is as exhausted
Edge layer is difficult to have shielded layer and oversheath that enough physical strengths are used to support outside.So insulator needs in use
The dielectric constant in portion is lower but the higher but dielectric constant of intensity of PTFE half-feeding and outside that intensity is relatively low is higher
The combination of PTFE clinker.Therefore a kind of insulated conductor with double layer of insulation of the invention is all made of clinker conduct compared to conventional
The insulated conductor of insulating layer has lower dielectric constant, improves efficiency of transmission.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of insulated conductor with double layer of insulation.
Fig. 2 is a kind of schematic diagram of cable.
Wherein:
Conductor 1
Insulator 2, inner insulator 2.1, outer insulator 2.2
Shielded layer 3
Oversheath 4.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only invention a part of the embodiment, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of insulated conductor with double layer of insulation of the present invention, it includes conductor 1 and by pressure pcl
Insulator 2 of the knot ground around the PTFE dispersion resin of the paste extruded of the conductor 1.
Wherein the insulator 2 includes inner insulator 2.1 and outer insulator 2.2；
Following raw material, half-feeding and clinker are defined first herein:
Raw material, raw material are the mixed mixtures of dispersion resin and solvent naphtha；
Half-feeding, half-feeding be raw material by certain temperature technique processing after, solvent naphtha therein vapor away after it is low
Density material, density is less than 2100 kilograms per cubic meter；
Clinker, clinker are the high-density materials that half-feeding is formed after certain temperature sintering, and clinker density is 2100-
2200 kilograms per cubic meter.
The inner insulator 2.1 be PTFE dispersion resin half-feeding (half-feeding is exactly index and low density material, and density is small
In 2100 kilograms per cubic meter, it is preferable over 500-1800 kilograms per cubic meter)；Inner insulator 2.1 with a thickness of entire insulator 2
The 1-90% of thickness.
The outer insulator 2.2 is the clinker of PTFE dispersion resin；Outer insulation 2.2 with a thickness of 0.01mm-
2mm。
In order to obtain the high-frequency attenuation characteristic of coaxial cable requirement, the dielectric of the insulator 2 of PTFE dispersion resin is normal
Number must be as close possible to 1.The dielectric constant of PTFE without sintering is about 1.7, and the dielectric constant of sintered PTFE is big
About 2.Therefore as much as possible to use the PTFE without sintering as insulating layer, however the PTFE without sintering is as insulating layer
It is difficult to have shielded layer and oversheath that enough physical strengths are used to support outside.So insulator 2 is needed using internal
Dielectric constant it is lower but PTFE half-feeding that intensity is relatively low and the higher but dielectric constant of intensity of outside are higher
The combination of PTFE clinker.
A kind of production technology of the insulated conductor with double layer of insulation:
Step 1: forming insulating layer 2 using extrusion technique outside conductor 1, pressing material is raw material, and the formula of raw material is PTFE
Dispersion resin and solvent naphtha, solvent naphtha account for the 5-50% of total weight.PTFE dispersion resin is Daikin Industries,Ltd.
PTFE dispersion resin, trade mark F-104/F-104C/F-208/F-208H.
It is air-dried Step 2: the conductor with insulating layer enters air-drying box progress surface layer, air-drying box temperature is that 140-180 is Celsius
Degree.
Step 3: the first baking oven that the conductor with insulating layer passes through, the temperature of the first baking oven is 180-320 degrees Celsius,
Become the half-feeding without sintering in the first baking oven inner insulating layer 2；Solvent naphtha vapors away during this, is formed in half-feeding empty
Gas gap.
Step 4: the conductor with insulating layer enters the second baking oven, the temperature in the second baking oven is 330-380 DEG C, is higher than
First baking oven, so that continue to be sintered on the surface layer of insulating layer 2, when the conductor with insulating layer discharges from the second baking oven, insulation
Layering has been carried out in layer 2, is divided into the inner insulator 2.1 of the half-feeding without sintering and is sintered to the outer insulator of clinker
2.2。
Embodiment 1
The outer diameter of inner conductor is 0.16mm, total outer diameter 0.5mm of insulator, wall thickness 0.17mm, the thickness of inner insulator
0.12mm, the thickness 0.05mm of outer insulator, linear velocity 8m/min,
Air-drying box temperature is 150 degrees Celsius, air-drying box length 10m,
The long 5m of first baking oven is divided into five warm areas,
The long 1m of first the first warm area of baking oven, first baking oven the first warm area temperature are 200 degrees Celsius,
The long 1m of first the second warm area of baking oven, first baking oven the second warm area temperature are 250 degrees Celsius,
The long 1m of first baking oven third warm area, the first baking oven third warm area temperature are 280 degrees Celsius,
The first long 1m in baking oven four-temperature region, the first baking oven four-temperature region temperature are 275 degrees Celsius,
The first baking oven long 1m of the 5th warm area, the 5th warm area temperature of the first baking oven are 270 degrees Celsius,
The long 10m of second baking oven points are five warm areas,
The long 2m of second the first warm area of baking oven, second baking oven the first warm area temperature are 320 degrees Celsius,
The long 2m of second the second warm area of baking oven, second baking oven the second warm area temperature are 325 degrees Celsius,
The long 2m of second baking oven third warm area, the second baking oven third warm area temperature are 335 degrees Celsius,
The second long 2m in baking oven four-temperature region, the second baking oven four-temperature region temperature are 340 degrees Celsius,
The second baking oven long 2m of the 5th warm area, the 5th warm area temperature of the second baking oven are 330 degrees Celsius.
The dielectric constant of the insulating layer of final products is about 1.77.
Embodiment 2
The outer diameter of inner conductor is 1.1mm, total outer diameter 3.0mm of insulator, wall thickness 0.95mm, the thickness of inner insulator
0.665mm, the thickness 0.285mm of outer insulator, linear velocity 25m/min,
Air-drying box temperature is 155 degrees Celsius, air-drying box length 45m,
The long 20m of first baking oven is divided into ten warm areas,
The long 2m of first the first warm area of baking oven, first baking oven the first warm area temperature are 200 degrees Celsius,
The long 2m of first the second warm area of baking oven, first baking oven the second warm area temperature are 250 degrees Celsius,
The long 2m of first baking oven third warm area, the first baking oven third warm area temperature are 280 degrees Celsius,
The first long 2m in baking oven four-temperature region, the first baking oven four-temperature region temperature are 300 degrees Celsius,
The first baking oven long 2m of the 5th warm area, the 5th warm area temperature of the first baking oven are 300 degrees Celsius,
The first baking oven long 2m of the 6th warm area, the 6th warm area temperature of the first baking oven are 310 degrees Celsius,
The first baking oven long 2m of the 7th warm area, the 7th warm area temperature of the first baking oven are 310 degrees Celsius,
The first baking oven long 2m of the 8th warm area, the 8th warm area temperature of the first baking oven are 320 degrees Celsius,
The first baking oven long 2m of the 9th warm area, the 9th warm area temperature of the first baking oven are 320 degrees Celsius,
The first baking oven long 2m of the tenth warm area, the tenth warm area temperature of the first baking oven are 320 degrees Celsius,
The long 20m of second baking oven points are ten warm areas,
The long 2m of second the first warm area of baking oven, second baking oven the first warm area temperature are 330 degrees Celsius,
The long 2m of second the second warm area of baking oven, second baking oven the second warm area temperature are 330 degrees Celsius,
The long 2m of second baking oven third warm area, the second baking oven third warm area temperature are 340 degrees Celsius,
The second long 2m in baking oven four-temperature region, the second baking oven four-temperature region temperature are 350 degrees Celsius,
The second baking oven long 2m of the 5th warm area, the 5th warm area temperature of the second baking oven are 360 degrees Celsius,
The second baking oven long 2m of the 6th warm area, the 6th warm area temperature of the second baking oven are 370 degrees Celsius,
The second baking oven long 2m of the 7th warm area, the 7th warm area temperature of the second baking oven are 380 degrees Celsius,
The second baking oven long 2m of the 8th warm area, the 8th warm area temperature of the second baking oven are 380 degrees Celsius,
The second baking oven long 2m of the 9th warm area, the 9th warm area temperature of the second baking oven are 370 degrees Celsius,
The second baking oven long 2m of the tenth warm area, the tenth warm area temperature of the second baking oven are 360 degrees Celsius.
The dielectric constant of the insulating layer of final products is about 1.79.
Referring to fig. 2, a kind of cable, including the insulated conductor with double layer of insulation, in the insulated conductor with double layer of insulation
It is disposed with shielded layer 3 and oversheath 4 outside.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.All uses
Equivalent transformation or equivalent replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Claims (8)
1. a kind of insulated conductor with double layer of insulation, it includes conductor and by pressure coalescence the thickener around the conductor squeezes
The insulator of the PTFE dispersion resin of pressure；
It is characterized by: wherein the insulator includes inner insulator and outer insulator；
The inner insulator is PTFE dispersion resin half-feeding；
The outer insulator is PTFE dispersion resin clinker.
2. a kind of insulated conductor with double layer of insulation according to claim 1, it is characterised in that: the thickness of inner insulator
Degree is the 1-90% of entire insulation thickness.
3. a kind of insulated conductor with double layer of insulation according to claim 1, it is characterised in that: the density of half-feeding is small
In 2100 kilograms per cubic meter；Clinker density is 2100-2200 kilograms per cubic meter.
4. a kind of insulated conductor with double layer of insulation according to claim 3, it is characterised in that: be preferable over 500-1800
Kilograms per cubic meter.
5. a kind of insulated conductor with double layer of insulation according to claim 1, it is characterised in that: a kind of band double hyer insulation
The production technology of the insulated conductor of layer is as follows:
Step 1: forming insulating layer using extrusion technique outside conductor, pressing material is raw material, and the formula of raw material is PTFE dispersion tree
Rouge and solvent naphtha；
Step 2: the conductor with insulating layer enters air-drying box；
Step 3: the first baking oven for passing through of conductor with insulating layer, the temperature of the first baking oven is 180-320 degrees Celsius, the
One baking oven inner insulating layer becomes the half-feeding without sintering, and solvent naphtha vapors away during this；
Step 4: the conductor with insulating layer enters the second baking oven, the temperature in the second baking oven is 330-380 DEG C, so that insulation
The surface layer of layer continues to be sintered, and when the conductor with insulating layer discharges from the second baking oven, layering is had been carried out in insulating layer, is divided into not
The inner insulator of half-feeding through being sintered and the outer insulator for being sintered to clinker.
6. a kind of insulated conductor with double layer of insulation according to claim 5, it is characterised in that specifically comprises the processes of:
The outer diameter of inner conductor is 0.16mm, total outer diameter 0.5mm of insulator, wall thickness 0.17mm, the thickness of inner insulator
0.12mm, the thickness 0.05mm of outer insulator, linear velocity 8m/min,
Air-drying box temperature is 150 degrees Celsius, air-drying box length 10m,
The long 5m of first baking oven is divided into five warm areas,
The long 1m of first the first warm area of baking oven, first baking oven the first warm area temperature are 200 degrees Celsius,
The long 1m of first the second warm area of baking oven, first baking oven the second warm area temperature are 250 degrees Celsius,
The long 1m of first baking oven third warm area, the first baking oven third warm area temperature are 280 degrees Celsius,
The first long 1m in baking oven four-temperature region, the first baking oven four-temperature region temperature are 275 degrees Celsius,
The first baking oven long 1m of the 5th warm area, the 5th warm area temperature of the first baking oven are 270 degrees Celsius,
The long 10m of second baking oven points are five warm areas,
The long 2m of second the first warm area of baking oven, second baking oven the first warm area temperature are 320 degrees Celsius,
The long 2m of second the second warm area of baking oven, second baking oven the second warm area temperature are 325 degrees Celsius,
The long 2m of second baking oven third warm area, the second baking oven third warm area temperature are 335 degrees Celsius,
The second long 2m in baking oven four-temperature region, the second baking oven four-temperature region temperature are 340 degrees Celsius,
The second baking oven long 2m of the 5th warm area, the 5th warm area temperature of the second baking oven are 330 degrees Celsius.
7. a kind of insulated conductor with double layer of insulation according to claim 5, it is characterised in that specifically comprises the processes of:
The outer diameter of inner conductor is 1.1mm, total outer diameter 3.0mm of insulator, wall thickness 0.95mm, the thickness of inner insulator
0.665mm, the thickness 0.285mm of outer insulator, linear velocity 25m/min,
Air-drying box temperature is 155 degrees Celsius, air-drying box length 45m,
The long 20m of first baking oven is divided into ten warm areas,
The long 2m of first the first warm area of baking oven, first baking oven the first warm area temperature are 200 degrees Celsius,
The long 2m of first the second warm area of baking oven, first baking oven the second warm area temperature are 250 degrees Celsius,
The long 2m of first baking oven third warm area, the first baking oven third warm area temperature are 280 degrees Celsius,
The first long 2m in baking oven four-temperature region, the first baking oven four-temperature region temperature are 300 degrees Celsius,
The first baking oven long 2m of the 5th warm area, the 5th warm area temperature of the first baking oven are 300 degrees Celsius,
The first baking oven long 2m of the 6th warm area, the 6th warm area temperature of the first baking oven are 310 degrees Celsius,
The first baking oven long 2m of the 7th warm area, the 7th warm area temperature of the first baking oven are 310 degrees Celsius,
The first baking oven long 2m of the 8th warm area, the 8th warm area temperature of the first baking oven are 320 degrees Celsius,
The first baking oven long 2m of the 9th warm area, the 9th warm area temperature of the first baking oven are 320 degrees Celsius,
The first baking oven long 2m of the tenth warm area, the tenth warm area temperature of the first baking oven are 320 degrees Celsius,
The long 20m of second baking oven points are ten warm areas,
The long 2m of second the first warm area of baking oven, second baking oven the first warm area temperature are 330 degrees Celsius,
The long 2m of second the second warm area of baking oven, second baking oven the second warm area temperature are 330 degrees Celsius,
The long 2m of second baking oven third warm area, the second baking oven third warm area temperature are 340 degrees Celsius,
The second long 2m in baking oven four-temperature region, the second baking oven four-temperature region temperature are 350 degrees Celsius,
The second baking oven long 2m of the 5th warm area, the 5th warm area temperature of the second baking oven are 360 degrees Celsius,
The second baking oven long 2m of the 6th warm area, the 6th warm area temperature of the second baking oven are 370 degrees Celsius,
The second baking oven long 2m of the 7th warm area, the 7th warm area temperature of the second baking oven are 380 degrees Celsius,
The second baking oven long 2m of the 8th warm area, the 8th warm area temperature of the second baking oven are 380 degrees Celsius,
The second baking oven long 2m of the 9th warm area, the 9th warm area temperature of the second baking oven are 370 degrees Celsius,
The second baking oven long 2m of the tenth warm area, the tenth warm area temperature of the second baking oven are 360 degrees Celsius.
8. a kind of cable, including a kind of insulated conductor with double layer of insulation described in claim 1, with double layer of insulation
Shielded layer and oversheath are disposed with outside insulated conductor.
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|---|---|---|---|
| CN201910500187.4A CN110349697A (en) | 2019-06-11 | 2019-06-11 | A kind of insulated conductor and its production technology with double layer of insulation |
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| CN201910500187.4A CN110349697A (en) | 2019-06-11 | 2019-06-11 | A kind of insulated conductor and its production technology with double layer of insulation |
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| CN104641425A (en) * | 2012-06-26 | 2015-05-20 | 纳幕尔杜邦公司 | Compositions for repairing electrical signal-carrying cables |
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| CN207149292U (en) * | 2017-05-11 | 2018-03-27 | 西安富士达线缆有限公司 | A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101088130A (en) * | 2004-12-03 | 2007-12-12 | 杜邦三井氟化物有限公司 | Fluoropolymer-coated conductor, a coaxial cable using it, and methods of producing them |
| US20090294151A1 (en) * | 2008-05-14 | 2009-12-03 | Li jun hong | Skin cured ptfe wire and cable |
| CN104641425A (en) * | 2012-06-26 | 2015-05-20 | 纳幕尔杜邦公司 | Compositions for repairing electrical signal-carrying cables |
| CN204632442U (en) * | 2015-06-02 | 2015-09-09 | 珠海汉胜科技股份有限公司 | A kind of three coaxial phase-compensated cables |
| CN207149292U (en) * | 2017-05-11 | 2018-03-27 | 西安富士达线缆有限公司 | A kind of half firm type radio frequency coaxial-cable of thin-walled with embossing structure |
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Application publication date: 20191018 |