CN103871543A - Preparation method of insulator in extremely-thin coaxial cable - Google Patents
Preparation method of insulator in extremely-thin coaxial cable Download PDFInfo
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- CN103871543A CN103871543A CN201410090310.7A CN201410090310A CN103871543A CN 103871543 A CN103871543 A CN 103871543A CN 201410090310 A CN201410090310 A CN 201410090310A CN 103871543 A CN103871543 A CN 103871543A
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Abstract
The invention discloses a preparation method of an insulator in an extremely-thin coaxial cable. The preparation method comprises the following steps of (a) raw material selection; (b) pasty insulator preparation; (c) extruding and coating; (d) thermosetting and sintering. According to the preparation method of the insulator in the extremely-thin coaxial cable, disclosed by the invention, the process arrangement is reasonable, the implementation is simple and convenient, the cost is moderate, a good comprehensive mechanical performance is expressed by a prepared insulator during a using process, and thus the extremely-thin coaxial cable is longer in service life, more stable in performance and wider in application range.
Description
Technical field
The present invention relates to a kind of preparation method of Ultrathin coaxial cable insulator, relate in particular to that a kind of comprehensive mechanical property is good, the preparation method of insulator in the exsertile Ultrathin coaxial cable of insulating properties, belong to Ultrathin coaxial cable technical field.
Background technology
In recent years, along with the continuous quickening of mobile phone, the notebook computer consumer electronics product that is representative and communication, medical treatment, the microminiaturized development trend of military electronic product, performance requirement improves constantly, and the traditional wiring such as flat cable, the flexible PCB element that transmits various frequency signals in these products is transmitted rapidly the Ultrathin coaxial cable that speed is higher, frequency band is wider and anti-electromagnetic interference is strong and replaces.Particularly middle nineteen nineties in last century mobile communication universal, promoted especially research and development and the large-scale production of Ultrathin coaxial cable.
In existing technology, the insulator in Ultrathin coaxial cable adopts fluoroplastics mostly, as meltability perfluoroalkyl alkoxy copolymer (PFA), perfluoroethylene-propylene (FEP) etc.Above-mentioned insulator is owing to adopting single material, therefore aspect some mechanical properties, there is defect, for example: compressive property, anti-wear performance and tensile strength etc., limit to a certain extent the range of application of Ultrathin coaxial cable, made it can not be applicable to some accurate electronic products to environment sensitive.
Summary of the invention
For the demand, the invention provides the preparation method of insulator in a kind of Ultrathin coaxial cable, this preparation method's procedure arrangement is reasonable, is easy to implement, the insulator making in use shows good comprehensive mechanical property, has promoted the range of application of Ultrathin coaxial cable.
The present invention is the preparation method of insulator in a kind of Ultrathin coaxial cable, and it is standby that this preparation method comprises the steps: that a) raw material selects, b) preparation pasty state insulator, c) extrude coated, d) thermosetting sintering.
In a preferred embodiment of the present invention, in described step a), the main component of insulator is: polytetrafluoroethylene, glass fibre, graphite powder and relevant auxiliary agent; Plasticizer in auxiliary agent selects DOP or DBP, compatilizer to select cyclic acid anhydride type or oxazoline type compatilizer, crosslinking agent to select 2-ethyl-4 methylimidazole or dimethylaminopropylamine, viscosity modifier to select paraffin or microwax, and the content proportioning of four kinds of auxiliary agents is about 4:2:1:3.
In a preferred embodiment of the present invention, in described step b), preparation process is as follows: first, raw material is added to reactor, and uniform stirring 30-40 minute, temperature of reaction kettle is controlled at 60 ℃-80 ℃; Then, in reactor, add plasticizer and the compatilizer in auxiliary agent, temperature of reaction kettle rises to 100 ℃-120 ℃, uniform stirring 1-1.2 hour; Finally, temperature of reaction kettle is down to 80 ℃-90 ℃, continues to add crosslinking agent and the viscosity modifier in auxiliary agent, stir 50-60 minute.
In a preferred embodiment of the present invention, in described step c), extrude coated process as follows: first, pasty state insulator is imported to extruder, extruder temperature is controlled at 70 ℃-80 ℃; Then, pasty state insulator is evenly extruded, be coated on conductor outer surface and form coating layer, the extruded velocity of extruder is controlled at 0.3-0.35m/min, and coating thickness is controlled at 0.09-0.1mm; Finally, Overmolded insulator is placed in to room temperature cooling.
In a preferred embodiment of the present invention, in described step d), preparation process is as follows: first, be dried processing, temperature is controlled at 130 ℃-140 ℃, and the time is controlled at 30-35 minute; Then, carry out sintering processes, sintering furnace temperature is divided into two stages: the temperature of first stage is promoted to 180 ℃ from 0 ℃, and programming rate is controlled at 6 ℃/min, and sintering time is about 28-30 minute; The temperature of second stage is promoted to 360 ℃ from 180 ℃, and programming rate is controlled at 4 ℃/min, and sintering time is about 38-40 minute; Finally, by sintering finished in sintering furnace slow cooling to room temperature.
The present invention has disclosed the preparation method of insulator in a kind of Ultrathin coaxial cable, this preparation method's procedure arrangement is reasonable, be easy to implement, cost is moderate, make insulator and in use show good comprehensive mechanical property, make the useful life of Ultrathin coaxial cable more lasting, performance is more stable, and range of application is more broad.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the preparation method's of insulator in embodiment of the present invention Ultrathin coaxial cable process figure.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Fig. 1 is the preparation method's of insulator in embodiment of the present invention Ultrathin coaxial cable process figure; It is standby that this preparation method comprises the steps: that a) raw material selects, b) preparation pasty state insulator, c) extrude coated, d) thermosetting sintering.
Embodiment 1
In the Ultrathin coaxial cable that the present invention mentions, the concrete preparation process of insulator is as follows:
A) raw material selects standbyly, and the main component of insulator and percentage composition proportioning thereof are: polytetrafluoroethylene 65%, glass fibre 18%, graphite powder 8%, and all the other are relevant auxiliary agent; Polytetrafluoroethylene is micro-powdered granule, and its average grain diameter is about 0.3um; Glass fibre is the short alkali-free glass fibre of cutting, and its filament diameter is about 10um, and length is about 4mm; The average grain diameter of graphite powder is about 16um; Plasticizer in auxiliary agent selects DOP, compatilizer to select cyclic acid anhydride type compatilizer, crosslinking agent to select 2-ethyl-4 methylimidazole, viscosity modifier to select paraffin, and the content proportioning of four kinds of auxiliary agents is about 4:2:1:3;
B) preparation pasty state insulator, pasty state insulator preparation process is as follows: first, raw material is added to reactor, uniform stirring 30-35 minute, temperature of reaction kettle is controlled at 65 ℃-70 ℃; Then, in reactor, add plasticizer and the compatilizer in auxiliary agent, temperature of reaction kettle rises to 100 ℃-110 ℃, uniform stirring 1.2 hours; Finally, temperature of reaction kettle is down to 80 ℃-85 ℃, continues to add crosslinking agent and the viscosity modifier in auxiliary agent, stir and make pasty state insulator after 50-55 minute;
C) extrude coatedly, extrude coated process as follows: first, pasty state insulator is imported to extruder, extruder temperature is controlled at 70 ℃-75 ℃; Then, pasty state insulator is evenly extruded, be coated on conductor outer surface and form coating layer, the extruded velocity of extruder is controlled at 0.3m/min, and coating thickness is controlled at 0.09-0.1mm; Finally, Overmolded insulator is placed in to room temperature cooling;
D) thermosetting sintering, thermosetting sintering process is as follows: first, Overmolded insulator is dried to processing, baking temperature is controlled at 130 ℃-135 ℃, time is controlled at 32-34 minute, and object is the unnecessary auxiliary agent of removing in insulator, the generation of toxic gas when avoiding sintering; Then, carry out sintering processes, sintering furnace temperature is divided into two stages: the temperature of first stage is promoted to 180 ℃ from 0 ℃, and programming rate is controlled at 6 ℃/min, and sintering time is about 28-30 minute; The temperature of second stage is promoted to 360 ℃ from 180 ℃, and programming rate is controlled at 4 ℃/min, and sintering time is about 38-40 minute; Finally, by sintering finished in sintering furnace slow cooling to room temperature.
Embodiment 2
In the Ultrathin coaxial cable that the present invention mentions, the concrete preparation process of insulator is as follows:
A) raw material selects standbyly, and the main component of insulator and percentage composition proportioning thereof are: polytetrafluoroethylene 62%, glass fibre 2%, graphite powder 7%, and all the other are relevant auxiliary agent; Polytetrafluoroethylene is micro-powdered granule, and its average grain diameter is about 0.35um; Glass fibre is the short alkali-free glass fibre of cutting, and its filament diameter is about 12um, and length is about 4.5mm; The average grain diameter of graphite powder is about 18um; Plasticizer in auxiliary agent selects DBP, compatilizer to select oxazoline type compatilizer, crosslinking agent to select dimethylaminopropylamine, viscosity modifier to select microwax, and the content proportioning of four kinds of auxiliary agents is about 4:2:1:3;
B) preparation pasty state insulator, pasty state insulator preparation process is as follows: first, raw material is added to reactor, uniform stirring 35 minutes, temperature of reaction kettle is controlled at 70 ℃-75 ℃; Then, in reactor, add plasticizer and the compatilizer in auxiliary agent, temperature of reaction kettle rises to 110 ℃-120 ℃, uniform stirring 1 hour; Finally, temperature of reaction kettle is down to 85 ℃-90 ℃, continues to add crosslinking agent and the viscosity modifier in auxiliary agent, stir and make pasty state insulator after 55-60 minute;
C) extrude coatedly, extrude coated process as follows: first, pasty state insulator is imported to extruder, extruder temperature is controlled at 75 ℃-80 ℃; Then, pasty state insulator is evenly extruded, be coated on conductor outer surface and form coating layer, the extruded velocity of extruder is controlled at 0.35m/min, and coating thickness is controlled at 0.09-0.1mm; Finally, Overmolded insulator is placed in to room temperature cooling;
D) thermosetting sintering, thermosetting sintering process is as follows: first, Overmolded insulator is dried to processing, baking temperature is controlled at 135 ℃-140 ℃, time is controlled at 30-32 minute, and object is the unnecessary auxiliary agent of removing in insulator, the generation of toxic gas when avoiding sintering; Then, carry out sintering processes, sintering furnace temperature is divided into two stages: the temperature of first stage is promoted to 180 ℃ from 0 ℃, and programming rate is controlled at 6 ℃/min, and sintering time is about 28-30 minute; The temperature of second stage is promoted to 360 ℃ from 180 ℃, and programming rate is controlled at 4 ℃/min, and sintering time is about 38-40 minute; Finally, by sintering finished in sintering furnace slow cooling to room temperature.
The present invention has disclosed the preparation method of insulator in a kind of Ultrathin coaxial cable, be characterized in: this preparation method's procedure arrangement is reasonable, be easy to implement, cost is moderate, make insulator and in use show good comprehensive mechanical property, make the useful life of Ultrathin coaxial cable more lasting, performance is more stable, and range of application is more broad.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.
Claims (5)
1. a preparation method for insulator in Ultrathin coaxial cable, is characterized in that, it is standby that this preparation method comprises the steps: that a) raw material selects, b) preparation pasty state insulator, c) extrude coated, d) thermosetting sintering.
2. the preparation method of insulator in Ultrathin coaxial cable according to claim 1, is characterized in that, in described step a), the main component of insulator is: polytetrafluoroethylene, glass fibre, graphite powder and relevant auxiliary agent; Plasticizer in auxiliary agent selects DOP or DBP, compatilizer to select cyclic acid anhydride type or oxazoline type compatilizer, crosslinking agent to select 2-ethyl-4 methylimidazole or dimethylaminopropylamine, viscosity modifier to select paraffin or microwax, and the content proportioning of four kinds of auxiliary agents is about 4:2:1:3.
3. the preparation method of insulator in Ultrathin coaxial cable according to claim 1, is characterized in that, in described step b), preparation process is as follows: first, raw material is added to reactor, uniform stirring 30-40 minute, temperature of reaction kettle is controlled at 60 ℃-80 ℃; Then, in reactor, add plasticizer and the compatilizer in auxiliary agent, temperature of reaction kettle rises to 100 ℃-120 ℃, uniform stirring 1-1.2 hour; Finally, temperature of reaction kettle is down to 80 ℃-90 ℃, continues to add crosslinking agent and the viscosity modifier in auxiliary agent, stir 50-60 minute.
4. the preparation method of insulator in Ultrathin coaxial cable according to claim 1, is characterized in that, in described step c), extrudes coated process as follows: first, pasty state insulator is imported to extruder, extruder temperature is controlled at 70 ℃-80 ℃; Then, pasty state insulator is evenly extruded, be coated on conductor outer surface and form coating layer, the extruded velocity of extruder is controlled at 0.3-0.35m/min, and coating thickness is controlled at 0.09-0.1mm; Finally, Overmolded insulator is placed in to room temperature cooling.
5. the preparation method of insulator in Ultrathin coaxial cable according to claim 1, is characterized in that, in described step d), preparation process is as follows: first, be dried processing, temperature is controlled at 130 ℃-140 ℃, and the time is controlled at 30-35 minute; Then, carry out sintering processes, sintering furnace temperature is divided into two stages: the temperature of first stage is promoted to 180 ℃ from 0 ℃, and programming rate is controlled at 6 ℃/min, and sintering time is about 28-30 minute; The temperature of second stage is promoted to 360 ℃ from 180 ℃, and programming rate is controlled at 4 ℃/min, and sintering time is about 38-40 minute; Finally, by sintering finished in sintering furnace slow cooling to room temperature.
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Cited By (3)
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| CN105336447A (en) * | 2015-11-23 | 2016-02-17 | 安徽顺驰电缆有限公司 | Production method of coaxial cable |
| CN105720344A (en) * | 2015-06-30 | 2016-06-29 | 深圳金信诺高新技术股份有限公司 | Low loss half-flexible coaxial radio frequency cable |
| CN108630356A (en) * | 2018-05-04 | 2018-10-09 | 邵春雷 | A kind of intelligent high temperature electric wire manufacture complete set of equipments |
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| CN101064201A (en) * | 2006-04-24 | 2007-10-31 | 深圳市金信诺电缆技术有限公司 | Process for manufacturing coaxial cable insulation layer and its die equipment |
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| CN105720344A (en) * | 2015-06-30 | 2016-06-29 | 深圳金信诺高新技术股份有限公司 | Low loss half-flexible coaxial radio frequency cable |
| CN105720344B (en) * | 2015-06-30 | 2019-03-22 | 深圳金信诺高新技术股份有限公司 | Low-loss semi-flexible coaxial radio frequency cable |
| CN105336447A (en) * | 2015-11-23 | 2016-02-17 | 安徽顺驰电缆有限公司 | Production method of coaxial cable |
| CN108630356A (en) * | 2018-05-04 | 2018-10-09 | 邵春雷 | A kind of intelligent high temperature electric wire manufacture complete set of equipments |
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Application publication date: 20140618 |