CN103865173A - Insulator for radio frequency coaxial cable - Google Patents
Insulator for radio frequency coaxial cable Download PDFInfo
- Publication number
- CN103865173A CN103865173A CN201410090298.XA CN201410090298A CN103865173A CN 103865173 A CN103865173 A CN 103865173A CN 201410090298 A CN201410090298 A CN 201410090298A CN 103865173 A CN103865173 A CN 103865173A
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- frequency coaxial
- isolator
- insulator
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- H01B3/441—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 alkenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Communication Cables (AREA)
Abstract
The invention discloses an insulator for a radio frequency coaxial cable. The insulator is a foam insulator material and is mainly prepared by mixing materials such as a modified polypropylene resin, a nucleating agent and a foaming agent, wherein the modified polypropylene resin is a melt blending product of polypropylene and high density polyethylene; the nucleating agent is selected from inorganic packing; and the foaming agent is selected from a physical foaming agent. The invention discloses an insulator for the radio frequency coaxial cable. The insulator is proper in material selection, moderate in cost, stable in comprehensive mechanical property and outstanding in insulating performance. Meanwhile, the physical foaming process is scientific and reasonable, and the foaming degree is high and uniform, so that the service performance of the radio frequency coaxial cable is more stable, and the application range is wider.
Description
Technical field
The present invention relates to a kind of isolator of radio frequency coaxial-cable, relate in particular to a kind of material foam degrees high and even, the isolator of the radio frequency coaxial-cable that performance is comprehensive and stable, belongs to coaxial cable technology field.
Background technology
Gaining the name of radio frequency coaxial-cable is relevant to its structure, and concentric cable has referred to two concentric conductors, and conductor and screen layer share the cable in same axle center.The inner wire of radio frequency coaxial-cable is metal solid wire, nexine insulating material can be selected the material such as polyethylene, polypropylene, that another layer of annular conductive body is outer conductor in the outside of nexine insulating material, outer conductor adopts metal copper wire, aluminium wire or B alloy wire mostly, be wrapped on nexine insulating material by braiding or non-woven form, the outside of outer conductor adopts pvc material to be coated conventionally, forms jacket structure.Radio frequency coaxial-cable is one of modal transmission medium in local area network, why adopts said structure design, is the transmission in order to prevent external electromagnetic wave excitation normal signal, improves the transmission quality of signal.
In existing technology, the isolator of radio frequency coaxial-cable adopts polythene material mostly, and this material has the advantages such as good lower temperature resistance, acid and alkali-resistance aggressiveness, water absorption resistance and high electric insulation performance, but polyethylene ESCR and heat-resistant aging are poor.In sum, select radio frequency coaxial-cable that the polyethylene insulation body of single material makes Shortcomings still aspect some mechanical properties, reduced to a certain extent use properties and the range of application of radio frequency coaxial-cable.
Summary of the invention
For the demand, the invention provides a kind of isolator of radio frequency coaxial-cable, this isolator material apolegamy is proper, cost is moderate, the isolator making in use shows good comprehensive mechanical property, and insulating property are outstanding, has promoted the range of application of radio frequency coaxial-cable.
The present invention is a kind of isolator of radio frequency coaxial-cable, this isolator is cellular insulation body material, mainly formulated by mixing of materials such as modified polypropylene resin, nucleator and whipping agents, described modified polypropylene resin is the melt blending product of polypropylene and high density polyethylene(HDPE), described nucleator is selected mineral-type filler, and described whipping agent is selected pneumatogen.
In a preferred embodiment of the present invention, in described modified polypropylene resin, the ratio of quality and the number of copies of polypropylene and high density polyethylene(HDPE) is about 100:6-8.
In a preferred embodiment of the present invention, the mineral-type filler that described nucleator is selected can be the one in talcum powder, mica powder, carbon powder.
In a preferred embodiment of the present invention, the median size of described nucleator is about 2.5-3.5um.
In a preferred embodiment of the present invention, described nucleator and the mass percent of modified polypropylene resin are about: 6%-8%:92%-94%.
In a preferred embodiment of the present invention, the pneumatogen that described whipping agent is selected can be the one in nitrogen, carbonic acid gas, argon gas.
The present invention has disclosed a kind of isolator of radio frequency coaxial-cable, and this isolator selection is proper, and cost is moderate, and comprehensive mechanical property is stable, and insulating property are outstanding; Meanwhile, its physical blowing process engineering, reasonable, foam degrees is high and even, makes the use properties of radio frequency coaxial-cable more stable, and range of application is more broad.
Embodiment
Below 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.
The isolator of the radio frequency coaxial-cable of mentioning in the present invention, this isolator is cellular insulation body material, mainly formulated by mixing of materials such as modified polypropylene resin, nucleator and whipping agents, described modified polypropylene resin is the melt blending product of polypropylene and high density polyethylene(HDPE), described nucleator is selected mineral-type filler, and described whipping agent is selected pneumatogen.
Further illustrate, in above-mentioned modified polypropylene resin, the ratio of quality and the number of copies of polypropylene and high density polyethylene(HDPE) is about 100:6-8; The mineral-type filler that nucleator is selected can be the one in talcum powder, mica powder, carbon powder; The median size of nucleator is about 2.5-3.5um; The mass percent of nucleator and modified polypropylene resin is about: 6%-8%:92%-94%; The pneumatogen that whipping agent is selected can be the one in nitrogen, carbonic acid gas, argon gas.
The concrete preparation process of the isolator of the radio frequency coaxial-cable that the present invention mentions is as follows:
A) preparation modified polypropylene resin, modified polypropylene resin is prepared from by blending technology by polypropylene and high density polyethylene(HDPE), and the ratio of quality and the number of copies that both mix is about 100:6; Process for preparation is divided into two steps: the first step, will in polypropylene and high density polyethylene(HDPE) importing rubber mixing machine, carry out blending and modifying, and rubber mixing machine revolution is about 100rpm, and barrel temperature is controlled at 190 DEG C of left and right, and the blend time is about 10 minutes; Second step, extrudes blend composition by screw extrusion press, the length-to-diameter ratio of extruder screw is 20:1, and the temperature of forcing machine material mouth is 225 DEG C;
B) plasticizing foaming, preparation process is as follows: first, modified polypropylene resin is added in twin screw extruder and is fully stirred and melting, barrel temperature is controlled at 220 DEG C-225 DEG C; Then, in barrel, add nucleator, the present embodiment is selected talcum powder, fully stirs and plastifies, and the pressure-controlling in barrel is in 200bar left and right, and fusion time is about 16-17 minute; Finally, in barrel, inject pneumatogen, the present embodiment is selected nitrogen, and nitrogen injection pressure is about 380bar, fully stir, make nitrogen in melting charge in hypersaturated state, churning time is controlled at 30-32 minute; In the present embodiment, the mass percent of nucleator and modified polypropylene resin is about: 6%:94%;
C) extrude coated, coated before, need carry out thermal pretreatment to inner wire, preheating temperature is controlled at 60 DEG C-65 DEG C; When raw material is extruded, the temperature of forcing machine die orifice is controlled at 180 DEG C-185 DEG C, and die orifice adopts pressure type structure, and the screw speed of forcing machine is about 120r/min, and length-to-diameter ratio is 25:1; When raw material is coated, the translational velocity of inner wire is controlled at 1-1.1m/min, and the insulation thickness making is about 5-5.2mm;
D) cooling forming, the type of cooling adopts Air-Water segmentation indirectly to process, and object is to reduce the phenomenon of isolator bias; Isolator is about 5.5 minutes the cooling time in water, and be about 2 minutes aerial cooling time.
The present invention has disclosed a kind of isolator of radio frequency coaxial-cable, and this isolator selection is proper, and cost is moderate, and comprehensive mechanical property is stable, and insulating property are outstanding; Meanwhile, its physical blowing process engineering, reasonable, foam degrees is high and even, makes the use properties of radio frequency coaxial-cable 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 domain that claims were limited.
Claims (6)
1. the isolator of a radio frequency coaxial-cable, it is characterized in that, this isolator is cellular insulation body material, mainly formulated by mixing of materials such as modified polypropylene resin, nucleator and whipping agents, described modified polypropylene resin is the melt blending product of polypropylene and high density polyethylene(HDPE), described nucleator is selected mineral-type filler, and described whipping agent is selected pneumatogen.
2. the isolator of radio frequency coaxial-cable according to claim 1, is characterized in that, in described modified polypropylene resin, the ratio of quality and the number of copies of polypropylene and high density polyethylene(HDPE) is about 100:6-8.
3. the isolator of radio frequency coaxial-cable according to claim 1, is characterized in that, the mineral-type filler that described nucleator is selected can be the one in talcum powder, mica powder, carbon powder.
4. the isolator of radio frequency coaxial-cable according to claim 3, is characterized in that, the median size of described nucleator is about 2.5-3.5um.
5. according to the isolator of the radio frequency coaxial-cable described in claim 1 to 4, it is characterized in that, described nucleator and the mass percent of modified polypropylene resin are about: 6%-8%:92%-94%.
6. the isolator of radio frequency coaxial-cable according to claim 1, is characterized in that, the pneumatogen that described whipping agent is selected can be the one in nitrogen, carbonic acid gas, argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090298.XA CN103865173A (en) | 2014-03-13 | 2014-03-13 | Insulator for radio frequency coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090298.XA CN103865173A (en) | 2014-03-13 | 2014-03-13 | Insulator for radio frequency coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103865173A true CN103865173A (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410090298.XA Pending CN103865173A (en) | 2014-03-13 | 2014-03-13 | Insulator for radio frequency coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103865173A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016023218A1 (en) * | 2014-08-15 | 2016-02-18 | Dow Global Technologies Llc | Polydimethylsiloxane grafted polyethylene foam |
| CN107818842A (en) * | 2017-11-03 | 2018-03-20 | 安徽潜隆机电科技有限公司 | A kind of radio frequency coaxial-cable |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935890A (en) * | 2006-09-21 | 2007-03-28 | 成都普天电缆股份有限公司 | Foamable insulating material for radiofrequency coaxial cable |
| CN101798413A (en) * | 2009-02-10 | 2010-08-11 | 日立电线株式会社 | Foamed resin composition and the electric wire, the cable that use this foamed resin composition |
| CN102070841A (en) * | 2011-01-21 | 2011-05-25 | 北京工商大学 | Polypropylene foam sheet prepared from composite foaming agent and production method thereof |
-
2014
- 2014-03-13 CN CN201410090298.XA patent/CN103865173A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935890A (en) * | 2006-09-21 | 2007-03-28 | 成都普天电缆股份有限公司 | Foamable insulating material for radiofrequency coaxial cable |
| CN101798413A (en) * | 2009-02-10 | 2010-08-11 | 日立电线株式会社 | Foamed resin composition and the electric wire, the cable that use this foamed resin composition |
| CN102070841A (en) * | 2011-01-21 | 2011-05-25 | 北京工商大学 | Polypropylene foam sheet prepared from composite foaming agent and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曹莉 等: "聚丙烯成核剂研究进展", 《高分子通报》, no. 4, 30 April 2013 (2013-04-30) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016023218A1 (en) * | 2014-08-15 | 2016-02-18 | Dow Global Technologies Llc | Polydimethylsiloxane grafted polyethylene foam |
| CN106575545A (en) * | 2014-08-15 | 2017-04-19 | 陶氏环球技术有限责任公司 | Polydimethylsiloxane grafted polyethylene foam |
| RU2681185C1 (en) * | 2014-08-15 | 2019-03-04 | Дау Глоубл Текнолоджиз Ллк | Foam based on polyethylene grafted with polydimethylsiloxane |
| US10308782B2 (en) | 2014-08-15 | 2019-06-04 | Dow Global Technologies Llc | Polydimethylsiloxane grafted polyethylene foam |
| CN106575545B (en) * | 2014-08-15 | 2022-01-25 | 陶氏环球技术有限责任公司 | Polydimethylsiloxane grafted polyethylene foam |
| CN107818842A (en) * | 2017-11-03 | 2018-03-20 | 安徽潜隆机电科技有限公司 | A kind of radio frequency coaxial-cable |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140618 |