CN102153878A - Preparation method for conductive polymer sheathing material - Google Patents
Preparation method for conductive polymer sheathing material Download PDFInfo
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- CN102153878A CN102153878A CN 201110054899 CN201110054899A CN102153878A CN 102153878 A CN102153878 A CN 102153878A CN 201110054899 CN201110054899 CN 201110054899 CN 201110054899 A CN201110054899 A CN 201110054899A CN 102153878 A CN102153878 A CN 102153878A
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Abstract
The invention belongs to the technical field of organic materials, relating to a preparation method for a conductive polymer sheathing material. The conductive polymer sheathing material comprises the following components in percent by mass: 60-30 percent of thermoplastic polymer resin, 25-30 percent of nanometer conductive carbon black, 5-14 percent of conductive carbon fiber or conductive agent, 10-18 percent of flexibilizer and 0.5-1.5 percent of processing aid and 1-3 percent of dispersing agent. The preparation method comprises the steps of: mixing and stirring well the raw materials of all the components and forming a product by melting, extruding, cooling, granulating, drying and packaging with a double-screw extruder; or adding a mixture consisting of the raw materials of all the components into an internal mixer for complete kneading, mixing and dispersing, then conducting mixing, rolling, laminating and crushing with a double-roller open mill and forming the product by melting, extruding, cooling, granulating, drying and packaging with a single-screw extruder. The preparation method has a simple process, and the conductive polymer sheathing material has the advantages of good electrical properties, low cost and production environment protection performance.
Description
Technical field:
The invention belongs to the organic materials technical field, the technology of preparation method that relates to a kind of conductive high polymer sheath composition material, the electric wire and cable material that is used for the railway run-through ground line occasion, the conductive high polymer sheath preparation methods that particularly a kind of railway run-through is used, its conductive high polymer sheath comprise and are arranged on the outer protective sleeve that the internal layer sheath that anticorrosion conductive coating extrudes the outer first time and the second time that is positioned at internal layer sheath periphery extrude.
Background technology:
Along with the high speed development of railway, the special-purpose communication signals of railway is just towards modernization, digitized direction fast development, thereby signalling system ground connection reliability is also had higher requirement, so the combined through ground wire cable arises at the historic moment.The combined through ground wire cable is a kind of railway signalling system cable of unified ground connection completely that is used for, it can make each working point touch down point of large-scale Railway Electric system for being consistent substantially, make the system device grounding safety reliable, eliminated because the current potential unbalanced current that the potential difference between the distinct device causes has been realized the effective reliable protection to personnel and equipment.At present the combined through ground wire that uses comprises cable core and is coated on the oversheath of described cable core outside, and its cable core comprises by certain stranded mode stranded at least one warning insulated wire and Duo Gen copper cash.Because railway all devices along the line all is connected with same Through ground wire, can guarantee that the earthing potential of all signal transmission apparatus all keeps certain balance at any time completely.The employed railway combined through ground wire of railway is the sheath copper cash now, promptly outside copper stranded conductor, coat the plumbous cover of one deck, the requirement that utilizes plumbous conductivity and corrosion resistance nature to satisfy ground wire, still, because of lead is toxic heavy metal, although its antiseptic property is good, but ought directly be embedded in undergroundly, lead can not be decomposed by biological metabolism, will pollute soil, water, and also can polluted air in manufacture course of products, operator's health is caused detrimentally affect.To the environmental requirement of cable, plumbous because of not meeting environmental requirement, national environmental protection department and railway interests have prohibited and have continued to use along with in the world.At present, a kind of to replace the material of original lead be magnesium one aluminium one zinc one rare earth alloy sheath run-through ground wire for having of putting down in writing in the document, replace lead alloy with sheath material aluminium one zinc, one magnesium, one rare earth alloy (abbreviation alloy aluminum), the volume specific resistance of this material is 1/7 of a lead, intensity is more than 10 times of lead, but this kind alloy material price height, density is big, anti-soil corrosion performance is poor, influences work-ing life.
Summary of the invention:
The objective of the invention is to overcome the shortcoming that prior art exists, seek to relate to and a kind ofly be used for the Through ground wire of the railway system and have black conductive high polymer sheath material of good processing characteristics and environmental-protecting performance and preparation method thereof, it is simple for process, and use properties is good.
To achieve these goals, the component of the conductive high polymer sheath material that the present invention relates to is 60-30% for the thermoplastic macromolecule resin by mass percentage, the nano-level conducting carbon black is 25-30%, conductive carbon fibre or conductive agent are 5-14%, toughner is 10-18%, processing aid is that 0.5-1.5% and dispersion agent are the mixture of 1-3%, after the each component raw material mixed, stirs by required mass percent, through the twin screw extruder fusion of special screw combinations, extrude, cooling, pelletizing, drying and packing form product; Or the mixture that thermoplastic macromolecule resin, graphitized carbon black, conductive carbon fibre, toughner, resist oxygen aging agent, dispersion agent constitute joined in the Banbury mixer fully mediate, mixing, disperse after, again in flakes with two roller mill mixing calenderings, the pulverizer fragmentation, then with broken material through the single screw extrusion machine fusion, extrude, cooling, pelletizing, drying and packing form product material.
The conductive high polymer sheath material that the present invention relates to, wherein the thermoplastic macromolecule resin is one or more the mixture among LLDPE, LDPE and the EVA; Particle diameter is the nano-level conducting carbon black of 1-80nm; Toughner is to choose any one kind of them among POE and the EPDM; Processing aid comprises one or more in thermo-oxidative ageing agent, acid-acceptor and the thinner, and the material of its preparation is applicable to railway system's communication conductive high polymer sheath run-through ground wire, is coated on the outside surface of stranded conductor, uses as external sheath layer.
The graphitized carbon black that the present invention adopts is novel nano-level conducting carbon black, and its primary particle diameter is little, and specific surface area is big, and the particle in the unit volume is many, and the formation network channel that easily contacts with each other improves electroconductibility; This nano-level conducting carbon black has than the macrovoid volume, and is dispersed high, is beneficial to be uniformly dispersed in matrix resin and to be dissolved in one with resin; Usually be in the electro-conductive material of filler with single graphitized carbon black, after the conductive channel that forms between carbon black particle is sophisticated to a certain degree, because the relation of carbon black self-conductive performance and carbon black and matrix resin cooperate degree, the reduction of limiting material resistivity, and the too high meeting of content of carbon black descends material mechanical performance, reduce material volume resistivity and obtain the low-resistance electro-conductive material, will be on carbon black filled conducing composite material basis, continue to add carbon fiber or novel conductive additive, after content of carbon black reaches a certain value, sooty continues to add no longer favourable to the conductive network of matrix material, and resistivity decreased is less; The adding of carbon fiber makes conductive network, the short range conduction that has carbon black particle to form, and the long-range conduction that also has fiber to participate in is further strengthened and is improved conductive channel, is beneficial to electronics and freely transmits, and makes sheath material have low resistivity and electroconductibility preferably.
The present invention makes the mechanical properties decrease that causes material owing to dosed more conductive filler material, and POE is a kind of thermoplastic elastomer, is ethylene-octene copolymer, with polyolefine consistency is preferably arranged; Melt blending is evenly distributed in the rigid resin POE compliant section, has formed hard and soft alternating structure, uses toughner POE can improve the mechanical property of material; EPDM is the saturated superpolymer of terpolymer EP rubber, and ageing-resistant performance is good, good weatherability, electrical insulation capability is good, chemical resistance good, shock elasticity is good, is applied to require fields such as ageing-resistant, water-fast, corrosion-resistant, electric insulation usually.
The present invention uses macromolecule dispersing agent to play effects such as moistening, dispersion, deflocculate and stable dispersion, reduction viscosity, selects the dispersion agent of polyethylene wax as graphitized carbon black for use.
Thermo-oxidative ageing agent in the processing aid that the present invention relates to comprises composite antioxidant B225; Acid-acceptor is a Zinic stearas, is the acid neutralizing agent in the polyolefine, and polyolefin color is had stable and lubrication, improves and extrudes processing characteristics; Thinner is a white oil; The consumption of additive is the conventional amount used of existing plastic working industry.
The present invention is good processability in process of production, can guarantee sheath material extrude coat closely, the smooth surface rounding, make sheath material that higher extruded velocity and production efficiency be arranged, the bending property of material, conductivity, good environmental protection, harmful substance contents meets the SJ/T11363-2006 regulation, the production technique simple possible, the material preparation less investment, cost is low; Anti-soil corrosion performance is good, long service life; Resistivity is low, the physical and chemical performance excellence; The cable long service life, environmental friendliness; The Through ground wire tensile strength of sheath material is not less than 10.0Mpa, and elongation at break is not less than 250%, and the thermal stress cracking performance is good, objectionable impurities (Hg, Pb, Cd, Cr6+, PBB, PBDE) content≤1000ppm, volume specific resistance≤0.7 Ω .cm.
Embodiment:
Below by embodiment the present invention is further described.
Embodiment 1:
Present embodiment is LLDPE, the LDPE of 59-30% or one or more the mixture among the EVA with the thermoplastic macromolecule resin with thermoplastic resin by mass percentage; Particle diameter is that the nano-level conducting carbon black of 1-80nm is 25-35%; Conductive carbon fibre is 5-14%; Toughner is the POE of 10-18%, among the EPDM one or both; Polyethylene of dispersing agent wax is 1.0-3.0%; Processing aid is 0.5-1.5%; Processing aid is one or more in thermo-oxidative ageing agent B225, acid-acceptor Zinic stearas and the thinner white oil; With above-mentioned raw materials mix, stirring is after the twin screw extruder of special screw combinations, the control processing temperature is under the 180-220 ℃ of condition, carries out fusion, extrudes, cooling, pelletizing, drying and packing make the conductive jacket material product; And to the preparation the conductive jacket material carry out Performance Detection according to the technical specifications of conductive high polymer sheath run-through ground wire, each physical function parameter sees Table 1.
Table 1: product physicals and testing method
The conductive high polymer sheath material of present embodiment preparation extrudes specification on SJ-90 or SJ-120 type forcing machine be DHS1*70mm
2Conductive high polymer sheath run-through ground wire, the control processing temperature is 160-200 ℃, the forcing machine length-to-diameter ratio is 25/1, compression ratio is 1: 1.1-1: 1.2, the over-all properties of the Through ground wire conductive high polymer sheath of producing is good, and smooth surface coats closely, jacket thickness is 2.0 ± 0.3mm, and its performance sees Table 2.
Table 2: specification is the various performance parameters of DHS 1*70 conductive high polymer sheath
Embodiment 2:
The conductive high polymer sheath material that present embodiment prepares with embodiment 1, preparation is applicable to the Through ground wire of conductive high polymer sheath, earlier will be by the thermoplastic macromolecule resin of the mass percent among the embodiment 1, graphitized carbon black, carbon fiber, toughner, dispersion agent, the mixture that processing aid constitutes, mix, stir, again through the twin screw extruder fusion of special screw combinations, extrude, cooling, pelletizing, dry and packing is made sheath material, wherein the mass percent of mixture each component can be adjusted according to the starting material of product specification and different production firm, by three kinds of products that three proportionings in the table 3 make respectively, its performance sees Table 4 respectively.
Table 3: the conductive high polymer sheath material is formed and proportioning
Table 4: product physicals and testing method
The test result of present embodiment shows that the material property of its preparation is good, and every technical indicator all adheres to specification.
Claims (3)
1. conductive high polymer sheath preparation methods, the component that it is characterized in that the conductive high polymer sheath material is 60-30% for the thermoplastic macromolecule resin by mass percentage, the nano-level conducting carbon black is 25-30%, conductive carbon fibre or conductive agent are 5-14%, toughner is 10-18%, processing aid is that 0.5-1.5% and dispersion agent are the mixture of 1-3%, earlier the each component raw material is mixed by required mass percent, after stirring, through the twin screw extruder fusion of special screw combinations, extrude, cooling, pelletizing, dry and packing forms product material; Or the mixture that thermoplastic macromolecule resin, graphitized carbon black, conductive carbon fibre, toughner, resist oxygen aging agent, dispersion agent constitute joined in the Banbury mixer fully mediate, mixing, disperse after, again in flakes with two roller mill mixing calenderings, the pulverizer fragmentation, then with broken material through the single screw extrusion machine fusion, extrude, cooling, pelletizing, drying and packing form product material.
2. according to the described conductive high polymer sheath preparation methods of claim 1, it is characterized in that thermoplastic macromolecule resin in the conductive high polymer sheath material is one or more the mixture among LLDPE, LDPE and the EVA; Particle diameter is the nano-level conducting carbon black of 1-80nm; Toughner is to choose any one kind of them among POE and the EPDM; Processing aid comprises one or more in thermo-oxidative ageing agent, acid-acceptor and the thinner, and the material of its preparation is applicable to railway system's communication conductive high polymer sheath run-through ground wire, is coated on the outside surface of stranded conductor, uses as external sheath layer.
3. conductive high polymer sheath preparation methods according to claim 1, it is characterized in that the graphitized carbon black that adopts is that novel nano-level conducting carbon black pellet easily contacts with each other and forms network channel and be uniformly dispersed and be dissolved in one with resin to improve electroconductibility, to be beneficial in matrix resin; The short range conduction that the adding of conductive carbon fibre makes conductive network have carbon black particle to form, the long-range conduction that also has fiber to participate in is strengthened and is improved conductive channel, is beneficial to electronics and freely transmits, and makes sheath material have low resistivity and electroconductibility preferably.
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| CN 201110054899 CN102153878A (en) | 2011-03-02 | 2011-03-02 | Preparation method for conductive polymer sheathing material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364584A (en) * | 2011-10-25 | 2012-02-29 | 江苏亨通线缆科技有限公司 | Cutthrough grounding cable applied in railway signal system |
| CN102604189A (en) * | 2012-03-07 | 2012-07-25 | 芜湖市旭辉电工新材料有限责任公司 | PTC (Positive Temperature Coefficient) high polymer heating material for self-limiting temperature electric tracing band |
| CN102775668A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Formula of composite spiral tube material |
| CN104200889A (en) * | 2014-09-03 | 2014-12-10 | 太仓苏晟电气技术科技有限公司 | High-effect rat-proof and termite-proof electric wire and cable and preparation method thereof |
| CN104818703A (en) * | 2015-05-24 | 2015-08-05 | 贵州蓝图新材料股份有限公司 | Aramid fiber high-strength geogrid |
| CN104895040A (en) * | 2015-05-24 | 2015-09-09 | 贵州蓝图新材料股份有限公司 | Carbon fiber high-strength geogrid |
| CN105061879A (en) * | 2015-08-19 | 2015-11-18 | 成都鑫成鹏线缆材料有限公司 | Ethylene-vinyl acetate copolymer based thermoplastic semiconductive shielding material for conductor and preparation method of thermoplastic semiconductive shielding material |
| CN106876018A (en) * | 2017-03-09 | 2017-06-20 | 李承坤 | A kind of high fire-retardance weatherability cable |
| CN107033463A (en) * | 2017-06-16 | 2017-08-11 | 公安部四川消防研究所 | A kind of composite flame-proof antistatic pipe and preparation method thereof |
| CN108690243A (en) * | 2018-05-18 | 2018-10-23 | 山东思舟信息科技有限公司 | A kind of preparation method of Novel conductive rubber |
| CN114773724A (en) * | 2022-03-24 | 2022-07-22 | 金发科技股份有限公司 | High-conductivity thermoplastic composite material and preparation method and application thereof |
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| US20100129695A1 (en) * | 2008-11-21 | 2010-05-27 | Hankook Tire Co., Ltd., A Korean Corporation | Molding material for fuel cell separator |
| CN101851366A (en) * | 2010-04-29 | 2010-10-06 | 上海科悦高分子材料有限公司 | Strippable shielding material for 35KV-level middle-high voltage cross-linked cable insulating layer as well as preparation method and application thereof |
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| CN1546560A (en) * | 2003-12-16 | 2004-11-17 | 中国科学院长春应用化学研究所 | Polyethylene/ethylene-propylene rubber/carbon black macromolecule conductive composite material preparation |
| CN1704447A (en) * | 2004-05-26 | 2005-12-07 | 中国科学院金属研究所 | Conductive composite materials with positive temperature coefficient effect and process for making same |
| US20060246286A1 (en) * | 2005-04-29 | 2006-11-02 | Easter Mark R | Strippable cable shield compositions |
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| US20100129695A1 (en) * | 2008-11-21 | 2010-05-27 | Hankook Tire Co., Ltd., A Korean Corporation | Molding material for fuel cell separator |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364584A (en) * | 2011-10-25 | 2012-02-29 | 江苏亨通线缆科技有限公司 | Cutthrough grounding cable applied in railway signal system |
| CN102364584B (en) * | 2011-10-25 | 2013-06-05 | 江苏亨通线缆科技有限公司 | Cutthrough grounding cable applied in railway signal system |
| CN102604189A (en) * | 2012-03-07 | 2012-07-25 | 芜湖市旭辉电工新材料有限责任公司 | PTC (Positive Temperature Coefficient) high polymer heating material for self-limiting temperature electric tracing band |
| CN102775668A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Formula of composite spiral tube material |
| CN104200889A (en) * | 2014-09-03 | 2014-12-10 | 太仓苏晟电气技术科技有限公司 | High-effect rat-proof and termite-proof electric wire and cable and preparation method thereof |
| CN104895040A (en) * | 2015-05-24 | 2015-09-09 | 贵州蓝图新材料股份有限公司 | Carbon fiber high-strength geogrid |
| CN104818703A (en) * | 2015-05-24 | 2015-08-05 | 贵州蓝图新材料股份有限公司 | Aramid fiber high-strength geogrid |
| CN105061879A (en) * | 2015-08-19 | 2015-11-18 | 成都鑫成鹏线缆材料有限公司 | Ethylene-vinyl acetate copolymer based thermoplastic semiconductive shielding material for conductor and preparation method of thermoplastic semiconductive shielding material |
| CN106876018A (en) * | 2017-03-09 | 2017-06-20 | 李承坤 | A kind of high fire-retardance weatherability cable |
| CN106876018B (en) * | 2017-03-09 | 2018-04-27 | 浙江海岩电子电缆有限公司 | A kind of high fire-retardance weatherability cable |
| CN107033463A (en) * | 2017-06-16 | 2017-08-11 | 公安部四川消防研究所 | A kind of composite flame-proof antistatic pipe and preparation method thereof |
| CN108690243A (en) * | 2018-05-18 | 2018-10-23 | 山东思舟信息科技有限公司 | A kind of preparation method of Novel conductive rubber |
| CN108690243B (en) * | 2018-05-18 | 2021-05-07 | 烁元新材料(东营)股份有限公司 | Preparation method of conductive rubber |
| CN114773724A (en) * | 2022-03-24 | 2022-07-22 | 金发科技股份有限公司 | High-conductivity thermoplastic composite material and preparation method and application thereof |
| CN114773724B (en) * | 2022-03-24 | 2024-03-22 | 金发科技股份有限公司 | High-conductivity thermoplastic composite material and preparation method and application thereof |
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