CN100419919C - Dielectric, insulated wire, coaxial cable, and dielectric production method - Google Patents
Dielectric, insulated wire, coaxial cable, and dielectric production method Download PDFInfo
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- CN100419919C CN100419919C CNB2003801101796A CN200380110179A CN100419919C CN 100419919 C CN100419919 C CN 100419919C CN B2003801101796 A CNB2003801101796 A CN B2003801101796A CN 200380110179 A CN200380110179 A CN 200380110179A CN 100419919 C CN100419919 C CN 100419919C
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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
- H01B3/443—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 from vinylhalogenides or other halogenoethylenic compounds
- H01B3/445—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 from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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Abstract
A dielectric is characterized in that the main component is a polytetrafluoroethylene resin, the effective relative dielectric constant is 1.8 or less, and the dulometer hardness is A50 to D36. An insulated wire exhibits a low attenuation in the high-frequency band and an excellent transmission characteristic. The adhesion of the center conductor to the dielectric and strippability are excellent. A desired characteristic impedance is obtained accurately. The characteristic impedance at a bent portion does not vary.
Description
Technical field
The present invention relates to dielectric, insulated electric conductor, coaxial cable and dielectric production method, being particularly related to polyflon (PTFE) is the dielectric of main component, this dielectric is few in the attenuation that high frequency band produces, demonstrate good transmission characteristic in, the adaptation of center conductor and dielectric is good, molding (strip) processability is good, can obtain desirable characteristic impedance effectively, and can prevent that the characteristic impedance of bending machining portion etc. from changing.
Background technology
As everyone knows, the cable of the transmitting high-frequency signal that coaxial cable is such, from the attenuation of signal and time of delay this point, it is favourable that the PTFE that does not burn till the PTFE of state or partly burn till state is used as dielectric.This is because of the PTFE formation porous body that does not burn till the PTFE of state or partly burn till state, thereby the little cause of actual effect permittivity.Actual effect permittivity (the ε of porous body
e) by the permittivity (ε of solid
A) and formula ε
e=ε
A 1-VAnd get.Wherein, V is the porosity (occupation rate of air).Therefore also the actual effect permittivity when burning till state fully is low for the actual effect permittivity of porous body.In addition, the attenuation of signal is along with the actual effect permittivity (ε of dielectric
e) reduce and reduce.And the time of delay of signal (τ) is by the actual effect permittivity (ε of dielectric
e) and formula
And get.Diminish along with the reducing of actual effect permittivity (ε e) of dielectric the time of delay of signal (τ).
All the time, the electric wire that uses as dielectric of the PTFE of such state that do not burn till or the PTFE that partly burns till state or coaxial cable are for example registered No. 2538664 communique, Japanese patent laid-open 11-213776 communique, Japanese patent laid-open 11-31422 communique, Japan Patent spy and are opened in the 2001-357730 communique and disclose to some extent at the real flat 3-68315 communique, Japanese patent laid-open 8-77843 communique, utility model opened of Japanese patent laid-open 2-273416 communique, Japan Patent.
At first, Japanese patent laid-open 2-273416 communique, Japan Patent are real opens insulated electric conductor or the coaxial cable that the PTFE that disclosed the state that will not burn till in flat 3-68315 communique, the Japanese patent laid-open 8-77843 communique uses as dielectric.
Secondly, utility model register No. 2538664 communique, Japanese patent laid-open 11-213776 communique, Japan Patent spy open the 2001-357730 communique disclosed dielectric by internal layer with outerly forms, internal layer for do not burn till the PTFE of state or partly burn till state PTFE, outer be insulated electric conductor or the coaxial cable that burns till the PTFE of state.
In addition, Japanese patent laid-open 11-31422 communique has disclosed the coaxial cable of the PTFE of the state that will partly burn till as the dielectric use.
As invention related to the present invention, can exemplify the applicant's the special hope of Japan Patent 2003-339036 number, the special invention of being willing to 2003-355432 number.
Owing to register No. 2538664 communique, Japanese patent laid-open 11-213776 communique, Japanese patent laid-open 11-31422 communique, Japan Patent spy and open insulated electric conductor or the coaxial cable that discloses in the 2001-357730 communique at the real flat 3-68315 communique, Japanese patent laid-open 8-77843 communique, utility model opened of above-mentioned Japanese patent laid-open 2-273416 communique, Japan Patent, the PTFE that all will not burn till the PTFE of state or partly burn till state uses as dielectric, thus the actual effect permittivity low, demonstrate good transmission characteristic.
But, above-mentioned Japanese patent laid-open 2-273416 communique, Japan Patent be real to be opened flat 3-68315 communique, Japanese patent laid-open 8-77843 communique, utility model and registers the dielectric that No. 2538664 communique, Japanese patent laid-open 11-213776 communique, Japanese patent laid-open 11-31422 communique, Japan Patent spy open the 2001-357730 communique, need not investigate fully and know that just it is softer, therefore the adaptation between center conductor and the dielectric is insufficient, when applying external force, center conductor probably can come off from dielectric.
In addition, add man-hour carrying out molding,, have the situation of fibrous in tow fine rule molding, therefore significantly reduced the molding processability because dielectric is cut untotally.
And, because dielectric softness, so external force such as applied pressure, pulling force, fastening force such as when the coiling bobbin and when utilizing metal wire rod to weave cover to form external conductor can make the dielectric distortion, the metal wire rod that constitutes external conductor may be absorbed in the dielectric certain degree.In this case, the difference between the calculated value of characteristic impedance and the measured value becomes big, is difficult to obtain desirable characteristic impedance.
In addition, when reality is used, because the bending machining when laying and also make the dielectric distortion easily from the pressure of outside etc.At this moment, in the part of dielectric distortion, local characteristic impedance meeting produces bigger variation.
The present invention is the invention of finishing for the technical problem that solves above-mentioned existence, its objective is the attenuation that high frequency band is provided few, when demonstrating good transmission characteristic, the adaptation of center conductor and dielectric is good, the molding processability good, can obtain desirable characteristic impedance effectively and can prevent dielectric, insulated electric conductor, the coaxial cable that the characteristic impedance of bending machining portion etc. changes, and the method for making above-mentioned dielectric is provided.
The announcement of invention
In order to achieve the above object, the dielectric of claim 1 of the present invention is characterised in that, is that main component, actual effect permittivity are below 1.8 and hardness is shown in below the above D36 of A50 with the duroscope scale of hardness with the polyflon.
The dielectric of claim 2 is characterised in that, with the polyflon is main component, this polyflon comprises the Fibrotic part of long side direction and is present in this long side direction spherical tie point (node) of fibrillatable part, connect by fubril (fibrillation) is three-dimensional between the Fibrotic part of above-mentioned long side direction is mutual, simultaneously, above-mentioned tie point (node) does not have between mutually by fubril (fibrillation) and direct-connected part.
The insulated electric conductor of claim 3 is characterised in that, is formed by center conductor and the claim 1 or the described dielectric of claim 2 that form around this center conductor.
The insulated electric conductor of claim 4 is characterised in that, in the described insulated electric conductor of claim 3, is below the above 196N of 4.9N with the conductor pull-out strength of above-mentioned center conductor when above-mentioned dielectric is extracted.
The coaxial cable of claim 5 is characterised in that, is made up of with the external conductor that forms around the dielectric of above-mentioned insulated electric conductor claim 3 or the described insulated electric conductor of claim 4.
The coaxial cable of claim 6 is characterised in that, in the described coaxial cable of claim 5, is below the above 196N of 4.9N with the conductor pull-out strength of above-mentioned center conductor when above-mentioned dielectric is extracted.
The coaxial cable of claim 7 is characterised in that in claim 5 or the described coaxial cable of claim 6, the said external conductor is formed by the metal wire rod braiding.
The coaxial cable of claim 8 is characterised in that in the described coaxial cable of claim 7, the hardness of above-mentioned dielectric is shown in below the above D25 of A60 with the duroscope scale of hardness.
The coaxial cable of claim 9 is characterised in that in claim 5 or the described coaxial cable of claim 6, the said external conductor is formed by the metal tube of having implemented ripple processing.
The coaxial cable of claim 10 is characterised in that in the described coaxial cable of claim 9, the hardness of above-mentioned dielectric is shown in below the above D25 of A60 with the duroscope scale of hardness.
The coaxial cable of claim 11 is characterised in that, in claim 5～claim 10 in arbitrary described coaxial cable, the degree of depth that the said external conductor is absorbed in above-mentioned dielectric is more than 0.4% below 5.0% of this dielectric thickness.
The dielectric production method of claim 12 is that manufacturing is the method for the dielectric of main component with the polyflon, the method is characterized in that, carry out heat treated, reach the not clear and definite as yet degree of endothermic peak of the state that burns till (burning till fully) in the crystallization melting curve that obtains by differential scanning calorimetry (DSC), form little dielectric that burns till state thus.
The dielectric production method of claim 13 is characterised in that, in the described dielectric production method of claim 12, the fusion initial temperature of polyflon+carry out the heat treated of stipulated time in 5～+ 15 ℃ the temperature range.
At first, if the actual effect permittivity of dielectric surpasses 1.8, then the decay quantitative change of high frequency band generation is many, can not get desirable loss.If the hardness of dielectric is represented less than A50 with duroscope hardness, then center conductor might come off from dielectric, the molding processability obviously reduces, and is difficult to obtain desirable characteristic impedance simultaneously, and characteristic impedance probably can be in the bigger variation of generation in the bending machining portion etc.In addition, if the hardness of dielectric represents to surpass D36 with duroscope hardness, then because the bounce-back of strain increases the reduction of dimensional stability in the time of therefore can causing bending machining.
The structure of dielectric is as described below.With the polyflon is main component, this polyflon comprises the Fibrotic part of long side direction and is present in this long side direction spherical tie point (node) of fibrillatable part, connect by fubril (fibrillation) is three-dimensional between the Fibrotic part of above-mentioned long side direction is mutual, simultaneously, above-mentioned tie point (node) does not have between mutually by fubril (fibrillation) and direct-connected part.All can obtain good characteristic aspect actual effect permittivity and the hardness two thus.
If with the conductor pull-out strength of center conductor when dielectric is extracted is more than the 4.9N, center conductor is difficult for pulling out from dielectric when then applying external force, and is more satisfactory.If below the 196N, the dielectric that then molding is added man-hour owing to just can peel with suitable dynamics, can not cause the dielectric distortion because of excessive power when center conductor peels, thereby better.
The so-called flexible coaxial cable and half flexible coaxial cable that are formed by metal wire rod braiding of external conductor particularly, the hardness of dielectric is shown in below the above D25 of A60 to well with the duroscope scale of hardness.If hardness is shown in more than the A60 with the duroscope scale of hardness, when then dielectric is stretched under situation such as processing,, can prevent effectively that dielectric from coming off from external conductor at the continuously extruded dielectric of long side direction.If hardness is shown in below the D25 with the duroscope scale of hardness, then can make external conductor moderately be absorbed in dielectric, can make dielectric and external conductor keep suitable dhering strength.
In addition, with the so-called corrugated coaxial cable of the metal tube of having implemented ripple processing as external conductor, the hardness of dielectric is shown in below the above D25 of A60 to well with the duroscope scale of hardness.If hardness is shown in more than the A60 with the duroscope scale of hardness, when then dielectric is stretched under situation such as processing,, can prevent effectively that dielectric from coming off from external conductor at the continuously extruded dielectric of long side direction.If hardness is shown in below the D25 with the duroscope scale of hardness, then can make external conductor moderately be absorbed in dielectric, can make dielectric and external conductor keep suitable dhering strength.
The degree that is absorbed in dielectric when external conductor only is 0.4% when above of this dielectric thickness, and dielectric and external conductor can keep suitable dhering strength, and be better.The degree that is absorbed in dielectric when external conductor only for 5.0% when following of this dielectric thickness, because dielectric can not produce big distortion, can obtain desirable characteristic impedance, and is therefore better.
Actual effect permittivity of the present invention is by calculating with following calculating formula the time of delay of network analyzer (HP8510E, ヒ ュ one レ ノ ト パ ノ カ one ト corporate system) instrumentation.The instrumentation condition is: frequency 2GH
z, 20 ℃ of temperature.
τ: the time of delay of signal (ns/m)
ε e: the actual effect permittivity of dielectric
Hardness adopts the value that is recorded by D type duroscope or A type duroscope.It is the dielectric of having taken out center conductor from length as the electric wire of 30mm that hardness is measured what use with test portion.Hardness is measured according to the hardness test method of JIS K 6253-1997 vulcanized rubber and thermoplastic elastomer and is implemented.
Use the test portion of the length of dielectric part as 50mm, will be with the shown maximum of the speed of extracting of the 12.7mm/min cupping machine when dielectric is extracted center conductor as the conductor pull-out strength.
By the present invention, can access the attenuation that high frequency band produces few, when demonstrating good transmission characteristic, the adaptation of center conductor and dielectric is good, the molding processability good, can obtain desirable characteristic impedance effectively and can prevent the dielectric that the characteristic impedance of bending machining portion etc. changes, the insulated electric conductor that possesses this dielectric has used the coaxial cable of this insulated electric conductor.
In addition, the manufacture method of dielectric of the present invention is to carry out heat treated to reach the not clear and definite as yet degree of endothermic peak of burning till state (burning till fully) in the crystallization melting curve that obtains by differential scanning calorimetry (DSC), forms little dielectric that burns till state thus.Like this, can obtain all good dielectrics aspect actual effect permittivity and hardness two.
" little state that burns till " is illustrated.Fig. 8, Figure 11, Figure 14, Figure 17, Figure 20, Figure 23 are being that the dielectric of main component carries out the crystallization melting curve figure that differential scanning calorimetry (DSC) obtains with the polyflon, and transverse axis is that temperature, the longitudinal axis are heat flow, represents its variation.Wherein, Figure 17 only observes a peak P1 for the figure of expression " not burning till state " near 340 ℃.Figure 23 observes near 340 ℃ in the peak P1 for the figure of expression " partly burning till state ", also observes another peak P2 near 320 ℃ of its front.At this moment Figure 20, only observes a peak P2 for the figure of expression " burning till state fully " near 320 ℃.
Corresponding to this, Fig. 8, Figure 11, Figure 14 are the figure of expression " little state that burns till ", have shown the intermediateness of " not burning till state " shown in Figure 17 and " partly burning till state " shown in Figure 23.The standard of distinguishing them is to have or not another peak P2 near shown in Figure 23 320 ℃.That is, will burn till until the state of observing another peak P2 and be called " partly burning till state ", " little state that burns till " of the present invention's regulation is meant the state that burns till before observing another peak P2.For judging that by having or not of above-mentioned another peak P2 " partly burning till state " still is " little state that burns till ", this is that applicant is through just discovery of experiment repeatedly.
At this moment, by the fusion initial temperature of polyflon+carry out the heat treated of stipulated time in 5～+ 15 ℃ the temperature range, can access the dielectric of desirable structure.
" fusion initial temperature " is meant the endothermic peak initial temperature (A point) in the crystallization melting curve figure that the polyflon of " not burning till state " shown in Figure 17 obtains by differential scanning calorimetry (DSC).
In Figure 17, symbol 25 is " baseline before endothermic peak is initial ", and symbol 27 is " tangent line of the maximum inclination point (C point) that endothermic peak is initial ".The intersection point (B point) of the tangent line 27 of the maximum inclination point (C point) that initial preceding baseline 25 of endothermic peak and endothermic peak are initial is the fusing point of polyflon.
In addition, above-mentioned Fig. 8, Figure 11, Figure 14, Figure 17, Figure 20, Figure 23 also are used for the explanation of execution mode described later.
The simple declaration of accompanying drawing
Fig. 1 is the schematic diagram of embodiments of the present invention 1, i.e. the summary sectional view of insulated electric conductor.
Fig. 2 is the schematic diagram of embodiments of the present invention 1～execution mode 3, i.e. the summary sectional view of coaxial cable.
Fig. 3 is the schematic diagram of manner of comparison 1, i.e. the summary sectional view of coaxial cable.
Fig. 4 is the schematic diagram of manner of comparison 2, i.e. the summary sectional view of coaxial cable.
Fig. 5 is the key diagram of the manufacture method of embodiments of the present invention 1～execution mode 3, manner of comparison 1～manner of comparison 3.
Fig. 6 is the schematic diagram of the coaxial cable characteristic of embodiments of the present invention 1～execution mode 3.
Fig. 7 is the schematic diagram of the coaxial cable characteristic of manner of comparison 1～manner of comparison 3.
Fig. 8 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of embodiments of the present invention 1.
Fig. 9 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of embodiments of the present invention 1.
Figure 10 is the photo of the molding processing characteristics of the coaxial cable of explanation embodiments of the present invention 1.
Figure 11 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of embodiments of the present invention 2.
Figure 12 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of embodiments of the present invention 2.
Figure 13 is the photo of the molding processing characteristics of the coaxial cable of explanation embodiments of the present invention 2.
Figure 14 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of embodiments of the present invention 3.
Figure 15 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of embodiments of the present invention 3.
Figure 16 is the photo of the molding processing characteristics of the coaxial cable of explanation embodiments of the present invention 3.
Figure 17 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of manner of comparison 1.
Figure 18 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of manner of comparison 1.
Figure 19 is the photo of the molding processing characteristics of the coaxial cable of explanation manner of comparison 1.
Figure 20 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of manner of comparison 2.
Figure 21 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of manner of comparison 2.
Figure 22 is the photo of the molding processing characteristics of the coaxial cable of explanation manner of comparison 2.
Figure 23 is the crystallization melting curve schematic diagram of the differential scanning calorimetry (DSC) of manner of comparison 3.
Figure 24 is the scanning electron microscope photo (10000 times) of dielectric of the coaxial cable of manner of comparison 3.
Figure 25 is the photo of the molding processing characteristics of the coaxial cable of explanation manner of comparison 3.
The best mode that carries out an invention
Below, with reference to Fig. 1～Figure 25, contrast embodiments of the present invention 1, execution mode 2, execution mode 3 are illustrated with manner of comparison 1, manner of comparison 2, manner of comparison 3.
The insulated electric conductor of embodiments of the present invention 1 is a structure shown in Figure 1.At first, 1 is center conductor, and forming with PTFE around this center conductor 1 is the dielectric 2 of main component.
Secondly, the manufacture method of above-mentioned insulated electric conductor is described.
About manufacture method, put execution mode 1, execution mode 2, execution mode 3 and manner of comparison 1, manner of comparison 2 respectively in order, manner of comparison 3 is shown in Fig. 5, describe with reference to these figure.
At first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 205 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver-plated copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 87m/min, making wall thickness is 1.02mm, again it is passed through continuously 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time), drying is removed extrusion aid, and final external diameter is 2.9mm.
Afterwards, by 335 ℃ baking ovens 4 (by 48 seconds time), this electric wire is carried out heat treated.This heat treated is a firing process, through this firing process, can obtain so-called " little state that burns till ".So just make the insulated electric conductor that the final external diameter that has formed dielectric 2 by PTFE in the periphery of center conductor 1 is about 2.9mm.At this moment, measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 1.8, and hardness is shown D25 with the duroscope scale of hardness.
In addition present embodiment, can consider that also the PTFE adhesive tape that does not for example burn till by package around center conductor 1 forms dielectric 2 to being illustrated by the example that pushes paste formation dielectric 2 around center conductor 1.
As shown in Figure 2,, implement the braiding lining of tin annealed copper wire that lines directly are 0.12mm and the coating of tin, constitute coaxial cable thus as external conductor 3 in the periphery of the dielectric 2 of above-mentioned insulated electric conductor.In the present embodiment, when forming from external conductor 3 carrier of (during the braiding lining) be about 1.47N to line tension, dielectric 2 be about 0.98N to line tension, the coiling tension of bobbin is about 9.8kN.
As external conductor 3, except that the braiding of metal wire rod lining, for example can also engage and horizontal formation such as lining around the such metal tube of, semi-rigid coaxial cable and corrugated coaxial cable by the horizontal long side direction of metal wire rod around, metal forming.
Be embodiments of the present invention 2 below, wherein employed insulated electric conductor is identical with above-mentioned execution mode 1, and its structure as shown in Figure 1.1 is center conductor, and forming with PTFE in the periphery of this center conductor is the dielectric 2 of main component.
Manufacture method to above-mentioned insulated electric conductor is illustrated.Present embodiment is identical with above-mentioned execution mode 1, and at first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 20.5 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver plating copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 8.7m/min, making wall thickness is 1.02mm, make it pass through 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time) continuously again, drying is removed extrusion aid, and final external diameter is 2.9mm.
Afterwards, by 330 ℃ baking ovens 4 (by 48 seconds time), this electric wire is carried out heat treated.This heat treated is a firing process, through this firing process, can obtain so-called " little state that burns till ".So just make the insulated electric conductor that has formed the about 2.9mm of final external diameter of dielectric 2 in the periphery of center conductor 1 by PTFE.At this moment, measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 1.75, and hardness is shown D20 with the duroscope scale of hardness.
This execution mode 2 has illustrated by push the example that paste forms dielectric 2 around center conductor 1, in addition, can consider that also the PTFE adhesive tape that does not for example burn till by package around center conductor 1 forms dielectric 2.
The coaxial cable of this execution mode is identical with above-mentioned execution mode 1, and its structure as shown in Figure 2.That is,, implement the braiding lining of tin annealed copper wire of lines footpath 0.12mm and the coating of tin as external conductor 3 in the periphery of the dielectric 2 of above-mentioned insulated electric conductor.In the present embodiment, when forming from external conductor 3 carrier of (during the braiding lining) be about 1.47N to line tension, dielectric 2 be about 0.98N to line tension, the coiling tension of bobbin is about 9.8kN.
As external conductor 3, except that the braiding of metal wire rod lining, also can engage and horizontal formation such as lining around the such metal tube of, semi-rigid coaxial cable and corrugated coaxial cable by the horizontal long side direction of for example metal wire rod around, metal forming.
Be embodiments of the present invention 3 below, wherein employed insulated electric conductor is identical with above-mentioned execution mode 1, execution mode 2, and its structure as shown in Figure 1.1 is center conductor, and forming with PTFE in the periphery of this center conductor is the dielectric 2 of main component.
Be the manufacture method of insulated electric conductor below, identical with above-mentioned execution mode 1, execution mode 2, at first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 20.5 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver plating copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 8.7m/min, making wall thickness is 1.02mm, make it pass through 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time) continuously again, drying is removed extrusion aid, and final external diameter is 29mm.
Afterwards, by 325 ℃ baking ovens 4 (by 48 seconds time), this electric wire is carried out heat treated.This heat treated is a firing process, through this firing process, can obtain so-called " little state that burns till ".So just make the insulated electric conductor that has formed the about 2.9mm of final external diameter of dielectric 2 in the periphery of center conductor 1 by PTFE.At this moment, measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 1.72, and hardness is shown A62 with the duroscope scale of hardness.
This execution mode 3 has also illustrated by push the example that paste forms dielectric 2 around center conductor 1, in addition, can consider that also the PTFE adhesive tape that does not for example burn till by package around center conductor 1 forms dielectric 2.
The coaxial cable of present embodiment and above-mentioned execution mode 1, execution mode 2 are identical, and its structure as shown in Figure 2.That is,, implement the braiding lining of tin annealed copper wire that lines directly are 0.12mm and the coating of tin as external conductor 3 in the periphery of the dielectric 2 of above-mentioned insulated electric conductor.In the present embodiment, when forming from external conductor 3 carrier of (during the braiding lining) be about 1.47N to line tension, dielectric 2 be about 0.98N to line tension, the coiling tension of bobbin is about 9.8kN.
As external conductor 3, except that the braiding of metal wire rod lining, also can engage and horizontal formation such as lining around the such metal tube of, semi-rigid coaxial cable and corrugated coaxial cable by the horizontal long side direction of for example metal wire rod around, metal forming.
Manner of comparison 1
Be illustrated comparing mode 1 below.Wherein employed insulated electric conductor and above-mentioned execution mode 1, execution mode 2, execution mode 3 identical, its structure as shown in Figure 1.1 is center conductor, and forming with PTFE in the periphery of this center conductor is the dielectric 2 of main component.
Manufacture method to insulated electric conductor is illustrated now.Identical with above-mentioned execution mode 1～execution mode 3, at first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 20.5 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver plating copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 8.7m/min, making wall thickness is 1.02mm, make it pass through 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time) continuously again, drying is removed extrusion aid, and final external diameter is 2.9mm.Do not carry out heat treated afterwards,, be in so-called " not burning till " state promptly without firing process.At this moment, measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 1.7, and hardness is shown A49 with the duroscope scale of hardness.
As shown in Figure 3, in the periphery of the dielectric 2 of insulated electric conductor, implement the braiding lining of tin annealed copper wire that lines directly be 0.12mm and the coating of tin, formation coaxial cable as external conductor 3.
Manner of comparison 2
Be illustrated comparing mode 2 below.Wherein employed insulated electric conductor is identical with above-mentioned manner of comparison 1, and its structure as shown in Figure 1.1 is center conductor, and forming with PTFE in the periphery of this center conductor 1 is the dielectric 2 of main component.
Manufacture method to above-mentioned insulated electric conductor is illustrated.Identical with above-mentioned manner of comparison 1, at first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 20.5 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver plating copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 8.7m/min, making wall thickness is 1.02mm, make it pass through 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time) continuously again, drying is removed extrusion aid, and final external diameter is 2.9mm.
Afterwards, with the baking oven 4 (by time 24 second) of this electric wire by 330 ℃, implement heat treated by 430 ℃ baking oven 5 (by 24 seconds time) and 530 ℃ baking oven 6 (by 24 seconds time) again.Such heat treated is a firing process, through this firing process, obtains so-called " burning till state fully ".The final external diameter that the periphery that so just makes center conductor 1 has formed dielectric 2 by PTFE is about the insulated electric conductor of 209mm.Measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 201, and hardness is shown D37 with the duroscope scale of hardness.
As shown in Figure 4, in the periphery of the dielectric 2 of insulated electric conductor, implement the braiding lining of tin annealed copper wire that lines directly be 0.12mm and the coating of tin, formation coaxial cable as external conductor 3.
Manner of comparison 3
Be illustrated comparing mode 3 below.Wherein employed insulated electric conductor is identical with above-mentioned manner of comparison 1, manner of comparison 2, and its structure as shown in Figure 1.1 is center conductor, and forming with PTFE in the periphery of this center conductor 1 is the dielectric 2 of main component.
Manufacture method to insulated electric conductor is illustrated.Identical with above-mentioned manner of comparison 1, manner of comparison 2, at first, PTFE resin 100 weight portions that fusing point is about 341 ℃ are that auxiliary agent 20.5 weight portions mix with commercially available oil, to mixture slaking 24 hours, modulate the dielectric paste.Then, with the gap of dielectric, made precast body in 120 seconds with surface pressing 3.73MPa pressurization with paste filling cylinder (the external diameter 16.25mm of internal diameter 60.2mm, SMIS).
Then, use paste extruder (diameter of cylinder 60.8mm, axle footpath 16.0mm) to push this precast body, make it be overlayed on the periphery of the center conductor 1 that the silver plating copper clad steel wire by external diameter 0.93mm forms with the linear velocity of 8.7m/min, making wall thickness is 1.02mm, make it pass through 200 ℃ baking oven 1 (by 24 seconds time), 230 ℃ baking oven 2 (by 24 seconds time) and 250 ℃ baking oven 3 (by 240 seconds time) continuously again, drying is removed extrusion aid, and final external diameter is 2.9mm.
Afterwards, this electric wire is implemented heat treated by 350 ℃ baking oven 4 (by 48 seconds time).Such heat treated is a firing process, through this firing process, obtains so-called " partly burning till state ".The periphery that so just makes at center conductor 1 is the insulated electric conductor of 2.9mm by the final external diameter that PTFE has formed dielectric 2.Measure the actual effect permittivity and the hardness of dielectric 2, the actual effect permittivity is 1.88, and hardness is shown D30 with the duroscope scale of hardness.
This manner of comparison 3 in the periphery of the dielectric 2 of insulated electric conductor, is implemented the braiding lining of tin annealed copper wire that lines directly be 0.12mm and the coating of tin, formation coaxial cable as external conductor 3 also as shown in Figure 4.
Below, as test portion, carry out evaluating characteristics shown below with the coaxial cable of execution mode 1～execution mode 3, manner of comparison 1～manner of comparison 3.Its result such as Fig. 6, shown in Figure 7.
Transmission characteristic
Under 20 ℃ of mensuration temperature, measure 1GH
z～18GH
zAttenuation (dB/m), and measure 2GH
zThe time time of delay (ns/m).
The adaptation of center conductor and dielectric
Use the test portion of the length of dielectric 2 parts as 50mm, with the speed of extracting of 12.7mm/min with center conductor 1 when dielectric 2 is extracted, with the maximum shown in the cupping machine as conductor pull-out strength (N).
The molding processability
Carry out molding processing with automaton (シ ュ ロ ニ カ one corporate system MP257), the state of the cut-off parts of visual dielectric 2 is estimated the molding processability.At this, be evaluated as O, expression does not have problems, and can carry out molding processing well; Be evaluated as *, the PTFE of expression dielectric 2 is residual a filament.
Characteristic impedance
By comparing the measured value of measuring according to the TDR method and using calculating formula
The calculated value of calculating and estimating.Wherein, Z
0Be characteristic impedance, D is core external diameter (mm), d
WBe litzendraht wire footpath (mm), ε
eActual effect permittivity for dielectric.Simultaneously, the characteristic impedance (Ω) of 90 degree sweeps is calculated variable quantity from measured value when measuring R=10mm.
Differential scanning calorimetry (DSC)
That is, according to the heat of transfer assay method of JIS K7122 plastics, carrying out with PTFE is the differential scanning calorimetry (DSC) of dielectric 2 of main component, observe therefrom the crystallization melting curve in endothermic peak be what state.
The scanning electron microscope photo
According to 10000 times of scanning electron microscope photos of composition, confirm the structure of dielectric.
Below, execution mode 1～execution mode 3, manner of comparison 1～manner of comparison 3 are investigated respectively.
At first, execution mode 1 as shown in Figure 6, the actual effect permittivity is 1.8, because of below 1.8, so transmission characteristic is better, time of delay is short, attenuation characteristic is also better.
Again, as shown in Figure 6, the hardness of dielectric 2 is D25, has enough hardness.
About the molding processing characteristics, when dielectric 2 has enough hardness, shown in the scanning electron microscope photo of Fig. 9, because fibrillation 13 is not the structure of direction ground connected node 11 only, but be three-dimensional syndeton, so as shown in figure 10, there is not the state of residual fine rule in dielectric 2, therefore can carry out molding processing without a doubt.
About characteristic impedance, as shown in Figure 6,, be difficult for damaging by pressure because of the fastening of external conductor 3 because dielectric 2 has enough hardness, therefore can be with value manufacturing near design load.In addition, the variable quantity of the characteristic impedance of sweep is little of 0.8 Ω.
About DSC, as shown in Figure 8, only there is tangible peak, i.e. a peak P1 near the place 340 ℃.If this point is illustrated, then as described above, proceed to till " partly burning till state " if burn till, as shown in figure 23, another peak P2 will appear near 320 ℃ before 340 ℃.In execution mode 1, burn till proceed to another peak P2 occur before till, form " little state that burns till ".
About the scanning electron microscope photo of Fig. 9, as previously mentioned, there is spherical node 11, the part that node 11 directly merges each other is more.In addition, node 11 merges each other, and fibrillation is less, at long side direction, horizontal, obliquely so that three-dimensional state is residual fibrillation 13 arranged, with 11 three-dimensional connections of node.By as mentioned above since node 11 directly the parts of fusions are more each other, so dielectric 2 is difficult for splitting, and demonstrates high rigidity.
Secondly, execution mode 2 as shown in Figure 6, the actual effect permittivity is 1.75, because of below 1.8, so the same with above-mentioned execution mode 1, transmission characteristic is better, lack time of delay, attenuation characteristic is also better.
Again, as shown in Figure 6, the hardness of dielectric 2 is D20, has enough hardness.
About the molding processing characteristics, when dielectric 2 has enough hardness, shown in the scanning electron microscope photo of Figure 12, because fibrillation 13 is not the structure of direction ground connected node 11 only, but be three-dimensional syndeton, so as shown in figure 13, there is not the state of residual fine rule in dielectric 2, therefore can carry out molding processing.
About characteristic impedance, because dielectric 2 has enough hardness, be difficult for damaging by pressure because of the fastening of external conductor 3, therefore can be with value manufacturing near design load.Again, as shown in Figure 6, the variable quantity of the characteristic impedance of sweep is little of 1.0 Ω.
About DSC, as shown in figure 11, only there is tangible peak, i.e. a peak P1 near the place 340 ℃.About this point, identical with above-mentioned execution mode 1, proceed to till " partly burning till state " if burn till, then as shown in figure 23, another peak P2 will appear near 320 ℃ before 340 ℃.In this execution mode 2 too, burn till proceed to another peak P2 occur before till, form " little state that burns till ".
About the scanning electron microscope photo, as shown in figure 12, there is aforesaid spherical node 11, node 11 also has the part of direct fusion each other.In addition, at long side direction, horizontal, obliquely fibrillation 13 arranged, with 11 three-dimensional connections of node so that three-dimensional state is residual.As mentioned above, because the mutual fusion part of node 11 is more, so dielectric 2 is difficult for splitting, and demonstrates higher hardness.
Secondly, execution mode 3 as shown in Figure 6, the actual effect permittivity is 1.72, because of below 1.8, so transmission characteristic is better, lack time of delay, attenuation characteristic is also better.
Again, as shown in Figure 6, the hardness of dielectric 2 is A62, has enough hardness.
About the molding processing characteristics, when dielectric 2 has enough hardness, as shown in figure 15, because fibrillation is not the structure of direction ground connected node 11 only, but is three-dimensional syndeton, so as shown in figure 16, there is not the state of residual fine rule in dielectric 2, can carry out molding processing.
About characteristic impedance, because dielectric 2 has enough hardness, be difficult for damaging by pressure because of the fastening of external conductor 3, therefore can be with value manufacturing near design load.In addition, as shown in Figure 6, the variable quantity of the characteristic impedance of sweep is 1.4 Ω, compares with above-mentioned execution mode 1, execution mode 2, though become big, no any problem in practicality.
About DSC, as shown in figure 14, only there is tangible peak, i.e. a peak P1 near the place 340 ℃.About this point, identical with the situation of above-mentioned execution mode 1, execution mode 2, proceed to till " partly burning till state " if burn till, then as shown in figure 23, another peak P2 will appear near 320 ℃ before 340 ℃.In this execution mode 3, burn till proceed to another peak P2 occur before till, form " little state that burns till ".
About the scanning electron microscope photo, as shown in figure 15, there is aforesaid spherical node 11, node 11 also has the part of direct fusion each other.In addition, at long side direction, horizontal, obliquely fibrillation 13 arranged, with 11 three-dimensional connections of node so that three-dimensional state is residual.As mentioned above, because the parts that node 11 merges each other are also more, so dielectric 2 is difficult for splitting, and demonstrates high rigidity.
Corresponding, manner of comparison 1 as shown in Figure 7, the actual effect permittivity is 1.7, because of below 1.8, so transmission characteristic is better, time of delay is short, attenuation characteristic is also better.About this point, identical with the situation of above-mentioned execution mode 1～execution mode 3.
Again, as shown in Figure 7, the hardness of dielectric 2 is A49, and is softer, so conductor pull-out strength step-down.
About the molding processing characteristics, dielectric 2 is softer, shown in the scanning electron microscope photo of Figure 18, because fibrillation 13 is structures of direction ground connected node 11 only, so as shown in figure 19, molding adds man-hour dielectric 2 and easily has the state (among Figure 19 this place with symbol 2 ' expression) of residual fine rule.
About characteristic impedance, because dielectric 2 softnesses are easily damaged by pressure because of the fastening of external conductor 3, the metal wire rod because of external conductor 3 embeds again, therefore is difficult to use the value manufacturing near design load.In addition, easily damage by pressure at the sweep dielectric, the variable quantity of characteristic impedance is greatly to 3.0 Ω.
About DSC, as shown in figure 17, though only there is a tangible peak near the place 340 ℃, promptly peak P1 confirms to have shoulder (shouler) part 21.
About the scanning electron microscope photo, as shown in figure 18, there is aforesaid spherical node 11, at long side direction fibrillation 13 connected nodes 11.Fibrillation 13 is not to horizontal, oblique extension.More space arranged in that 11 of nodes are residual.
Secondly, manner of comparison 2 as shown in Figure 7, the actual effect permittivity is 2.01, substantially exceeds 1.8, so transmission characteristic is relatively poor, time of delay is also long, attenuation characteristic is also bad.
Again, as shown in Figure 7, the hardness of dielectric 2 is D20, and is harder, so conductor pull-out strength height.About this point, also the situation with above-mentioned execution mode 1～execution mode 3 is identical.
About the molding processing characteristics, because dielectric 2 is harder, as shown in figure 21, fibrillation is not the structure of a direction ground connected node only, but forms gapless structure, and as shown in figure 22, molding adds man-hour dielectric 2 and do not have the state of residual fine rule.
About characteristic impedance, because dielectric 2 is harder, be difficult for damaging by pressure because of the fastening of external conductor 3, the metal wire rod because of external conductor 3 embeds again, therefore is difficult to use the value manufacturing near design load.In addition, the variable quantity of the characteristic impedance of sweep is also little of 0.5 Ω.
About DSC, as shown in figure 20, only confirmed near the peak P2 320 ℃.This is because fully burn till to the cause of " burning till state fully ", and therefore, near the peak 340 ℃ during " not burning till state " shown in Figure 17 shifts and appears near 320 ℃.
About the scanning electron microscope photo, as shown in figure 21, there is not aforesaid spherical node.Do not observe fibrillation and space yet.
Secondly, manner of comparison 3 as shown in Figure 7, the actual effect permittivity is 1.88, substantially exceeds 1.8, so transmission characteristic is relatively poor, time of delay is also long, attenuation characteristic is also bad.
Again, as shown in Figure 7, the hardness of dielectric 2 is D30, and is harder, so conductor pull-out strength height.About this point, identical with the situation of above-mentioned execution mode 1～execution mode 3.
About the molding processing characteristics, dielectric 2 is harder, and as shown in figure 24, fibrillation is not the structure of direction ground connected node only, but forms the less structure in gap, so as shown in figure 25, molding adds man-hour dielectric 2 and do not have the state of residual fine rule.
About characteristic impedance, because dielectric 2 is harder, be difficult for damaging by pressure because of the fastening of external conductor 3, in addition, the variable quantity of the characteristic impedance of sweep is also little of 0.6 Ω.
About DSC, as shown in figure 23, confirming has peak P1, P2 near near 2 places with 320 ℃ 340 ℃.That is, at this moment burn till " the little state that burns till " that surpass above-mentioned execution mode 1～execution mode 3 proceeds to " partly burning till state ", so, another peak P2 appears near 320 ℃ of 340 ℃ of fronts.
About the scanning electron microscope photo, as shown in figure 24, there is not aforesaid spherical node, do not observe fibrillation yet.Carry out node and fibriilar fusion,, observe space 23 at the slight crack place though do not observe spherical node and fibrous fibrillation.
Secondly, the hardness of the dielectric 2 of execution mode 1～execution mode 3 is shown in below the above D36 of A50 with the duroscope scale of hardness, so dielectric 2 fibrillatables, and no fine rule is pulled out, and is more stable, can carry out molding processing.
Again, because the hardness of the dielectric 2 of execution mode 1～execution mode 3 represents that with duroscope hardness is below the above D36 of A50, and when center conductor 1 being applied withdrawal force from the outside, not yielding with the contact portion of the center conductor 1 of dielectric 2, therefore be difficult between center conductor 1 and the dielectric 2 producing the gap, can obtain the suitable adaptation of center conductor 1 and dielectric 2.
Again, because the hardness of the dielectric 2 of execution mode 1～execution mode 3 is shown below the above D36 of A50 with the duroscope scale of hardness, and since when the coiling bobbin and when forming external conductor 3 etc. the external force of applied pressure, pulling force, fastening force and so on be not absorbed in dielectric 2 with can not making dielectric 2 distortion or external conductor 3 certain degrees, therefore, the calculated value of characteristic impedance and the difference of measured value diminish, and can obtain desirable characteristic impedance.
Again, because the hardness of the dielectric 2 of execution mode 1～execution mode 3 is shown below the above D36 of A50 with the duroscope scale of hardness, and because during actual the use from the pressure of outside and the bending machining when laying etc. be difficult for making dielectric 2 distortion, therefore can prevent that characteristic impedance from producing bigger variation in the part.
In execution mode 1～execution mode 3, method as the dielectric that obtains possessing desirable actual effect permittivity and hardness, employing is carried out the not clear and definite as yet degree of endothermic peak that heat treated reaches the state that burns till (burning till fully) in the crystallization melting curve that obtains by differential scanning calorimetry (DSC) and is formed little method of burning till the dielectric of state, therefore the dielectric that can obtain having desirable actual effect permittivity and hardness effectively.
The possibility of utilizing on the industry
As mentioned above, dielectric take polyflon (PTFE) as main component of the present invention, few in attenuation that high frequency band produces, demonstrate good transmission characteristic in, the adaptation of center conductor and dielectric is good, the molding processability is good, can obtain effectively desired characteristic impedance, and can prevent the variation of the characteristic impedance of bending machining part etc., be suitable for various insulated electric conductors, coaxial cable. And, by the manufacture method of dielectric of the present invention, can conscientiously obtain having the dielectric of desirable actual effect capacitivity and hardness.
Claims (12)
1. dielectric is characterized in that, be main component, actual effect permittivity with the polyflon below 1.8 and hardness be shown in below the above D36 of A50 with the duroscope scale of hardness.
2. insulated electric conductor is characterized in that, is formed by center conductor and the described dielectric of claim 1 that forms around this center conductor.
3. insulated electric conductor as claimed in claim 2, its feature also be, is below the above 196N of 4.9N with the conductor pull-out strength of above-mentioned center conductor when above-mentioned dielectric is extracted.
4. coaxial cable is characterized in that, is made of with the external conductor that forms around the dielectric of above-mentioned insulated electric conductor claim 2 or the described insulated electric conductor of claim 3.
5. coaxial cable as claimed in claim 4, its feature also be, is below the above 196N of 4.9N with the conductor pull-out strength of above-mentioned center conductor when above-mentioned dielectric is extracted.
6. as claim 4 or 5 described coaxial cables, its feature is that also the said external conductor is formed by the metal wire rod braiding.
7. coaxial cable as claimed in claim 6, its feature are that also the hardness of above-mentioned dielectric is shown in below the above D25 of A60 with the duroscope scale of hardness.
8. as claim 4 or 5 described coaxial cables, its feature is that also the said external conductor is formed by the metal tube of having implemented ripple processing.
9. coaxial cable as claimed in claim 8, its feature are that also the hardness of above-mentioned dielectric is shown in below the above D25 of A60 with the duroscope scale of hardness.
10. as arbitrary described coaxial cable in the claim 5～9, its feature also is, the degree of depth that the said external conductor is absorbed in above-mentioned dielectric only is more than 0.4% below 5.0% of this dielectric thickness.
11. described dielectric production method of claim 1, it is that manufacturing is the method for the dielectric of main component with the polyflon, it is characterized in that, carry out heat treated, reach the not clear and definite as yet degree of endothermic peak of the state that burns till fully in the crystallization melting curve that obtains by differential scanning calorimetry DSC, form little dielectric that burns till state thus.
12. dielectric production method as claimed in claim 11, its feature also be, the fusion initial temperature of polyflon+carry out the heat treated of stipulated time in 5～+ 15 ℃ the temperature range.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP79908/2003 | 2003-03-24 | ||
| JP799082003 | 2003-03-24 | ||
| JP2003079908 | 2003-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100030961A Division CN101241777B (en) | 2003-03-24 | 2003-12-25 | Dielectric, insulated wire, coaxial cable, and dielectric production method |
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| CN1759454A CN1759454A (en) | 2006-04-12 |
| CN100419919C true CN100419919C (en) | 2008-09-17 |
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| CN2008100030961A Expired - Fee Related CN101241777B (en) | 2003-03-24 | 2003-12-25 | Dielectric, insulated wire, coaxial cable, and dielectric production method |
| CNB2003801101796A Expired - Fee Related CN100419919C (en) | 2003-03-24 | 2003-12-25 | Dielectric, insulated wire, coaxial cable, and dielectric production method |
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| CN2008100030961A Expired - Fee Related CN101241777B (en) | 2003-03-24 | 2003-12-25 | Dielectric, insulated wire, coaxial cable, and dielectric production method |
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| JP (1) | JP4657729B2 (en) |
| CN (2) | CN101241777B (en) |
| AU (1) | AU2003292777A1 (en) |
| WO (1) | WO2004086416A1 (en) |
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| EP2065433B1 (en) | 2006-09-22 | 2011-12-21 | Kurabe Industrial Co., Ltd | Ptfe porous body, ptfe mixture, method for producing ptfe porous body, and electric wire/cable using ptfe porous body |
| JP5709569B2 (en) * | 2011-02-17 | 2015-04-30 | 矢崎総業株式会社 | Shielded cable |
| CN107710432B (en) | 2015-04-30 | 2021-03-09 | 帝人株式会社 | Piezoelectric element and device using the same |
| JP2017120860A (en) * | 2015-12-28 | 2017-07-06 | 帝人株式会社 | Braid-like piezoelectric element, cloth-like piezoelectric element using braid-like piezoelectric element, and device using them |
| JP6639907B2 (en) * | 2015-12-28 | 2020-02-05 | 帝人フロンティア株式会社 | Device with immobilized braided piezoelectric element |
| JP6835310B2 (en) * | 2016-10-28 | 2021-02-24 | 帝人フロンティア株式会社 | Fabric-like piezoelectric element using braided piezoelectric element and device using it |
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| US4596837A (en) * | 1982-02-22 | 1986-06-24 | Daikin Industries Ltd. | Semisintered polytetrafluoroethylene article and production thereof |
| CN85205343U (en) * | 1985-12-19 | 1986-10-01 | 郑州铁路局西安科学技术研究所 | Synthetic insulator |
| US4830062A (en) * | 1986-05-28 | 1989-05-16 | Daikin Industries, Ltd. | Porous heat-shrinkable tetrafluoroethylene polymer tube and process for producing the same |
| JPH05258615A (en) * | 1992-03-09 | 1993-10-08 | Junkosha Co Ltd | Insulated electric cable and its manufacture |
| JPH10287759A (en) * | 1997-04-16 | 1998-10-27 | Nitto Denko Corp | Porous polytetrafluoroethylene film and production thereof |
| JPH11203956A (en) * | 1998-01-19 | 1999-07-30 | Furukawa Electric Co Ltd:The | Telecommunication cable |
| JPH11213776A (en) * | 1998-01-29 | 1999-08-06 | Totoku Electric Co Ltd | Thin coaxial cable |
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| JPS58145735A (en) * | 1982-02-22 | 1983-08-30 | Daikin Ind Ltd | Production of porous polytetrafluoroethylene article |
| JP2557948Y2 (en) * | 1991-05-14 | 1997-12-17 | 古河電気工業株式会社 | Foam insulated wire |
| ATE248242T1 (en) * | 1994-10-04 | 2003-09-15 | Daikin Ind Ltd | POLYTETRAFLUORETHYLENE FIBER, COTTON-LIKE MATERIAL CONTAINING THIS FIBER AND METHOD FOR THE PRODUCTION THEREOF |
| JP3273735B2 (en) * | 1996-05-17 | 2002-04-15 | 日東電工株式会社 | Polytetrafluoroethylene porous membrane and method for producing the same, sheet-like polytetrafluoroethylene molded article, and filter medium for air filter |
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2003
- 2003-12-25 WO PCT/JP2003/016658 patent/WO2004086416A1/en active Application Filing
- 2003-12-25 CN CN2008100030961A patent/CN101241777B/en not_active Expired - Fee Related
- 2003-12-25 JP JP2004569943A patent/JP4657729B2/en not_active Expired - Fee Related
- 2003-12-25 CN CNB2003801101796A patent/CN100419919C/en not_active Expired - Fee Related
- 2003-12-25 AU AU2003292777A patent/AU2003292777A1/en not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4596837A (en) * | 1982-02-22 | 1986-06-24 | Daikin Industries Ltd. | Semisintered polytetrafluoroethylene article and production thereof |
| CN85205343U (en) * | 1985-12-19 | 1986-10-01 | 郑州铁路局西安科学技术研究所 | Synthetic insulator |
| US4830062A (en) * | 1986-05-28 | 1989-05-16 | Daikin Industries, Ltd. | Porous heat-shrinkable tetrafluoroethylene polymer tube and process for producing the same |
| JPH05258615A (en) * | 1992-03-09 | 1993-10-08 | Junkosha Co Ltd | Insulated electric cable and its manufacture |
| JPH10287759A (en) * | 1997-04-16 | 1998-10-27 | Nitto Denko Corp | Porous polytetrafluoroethylene film and production thereof |
| JPH11203956A (en) * | 1998-01-19 | 1999-07-30 | Furukawa Electric Co Ltd:The | Telecommunication cable |
| JPH11213776A (en) * | 1998-01-29 | 1999-08-06 | Totoku Electric Co Ltd | Thin coaxial cable |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003292777A1 (en) | 2004-10-18 |
| CN101241777B (en) | 2011-06-22 |
| WO2004086416A1 (en) | 2004-10-07 |
| JP4657729B2 (en) | 2011-03-23 |
| CN101241777A (en) | 2008-08-13 |
| CN1759454A (en) | 2006-04-12 |
| JPWO2004086416A1 (en) | 2006-06-29 |
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