CN101885873B - Semi-conductive ethylene vinyl acetate (EVA) plastic for shielding and production method thereof - Google Patents
Semi-conductive ethylene vinyl acetate (EVA) plastic for shielding and production method thereof Download PDFInfo
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- CN101885873B CN101885873B CN 201010168043 CN201010168043A CN101885873B CN 101885873 B CN101885873 B CN 101885873B CN 201010168043 CN201010168043 CN 201010168043 CN 201010168043 A CN201010168043 A CN 201010168043A CN 101885873 B CN101885873 B CN 101885873B
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Abstract
The invention relates to semi-conductive ethylene vinyl acetate (EVA) plastic for shielding and a production method thereof. A formula comprises EVA resin, carbon black, a dispersant, a cross-linking agent, a coupling agent and other aids. The carbon black is highly dispersed under the actions of the dispersant and relevant aids and the interlocking structures of carbon black particles are used, so that an EVA plastic product has high conductivity. The EVA plastic has the advantages of further enhancing the technology content of a cable, improving the flame resistance and the high temperature resistance of the cable, lowering product cost and enhancing economic benefit. A large amount of graphite is added as a flame-resistant and high temperature-resistant filler and enhances the flame resistance of the cable together with an appropriate amount of chlorinated paraffin and zinc stannate. The filler has high compatibility with other materials and high dispersibility and is matched with other stabilizers, so that a product has high heat resistance stability and flame resistance. Moreover, the lubricating performance of the product is improved to a large extent, a polyvinyl chloride (PVC) mixture has high uniform plasticizing capacity and high-speed melt fluidity, and the product has smooth surface, soft handfeel and high performance.
Description
Technical field
The present invention relates to a kind of electrical wire and cable plastic and production method thereof, particularly a kind of prescription of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding and production method thereof.
Background technology
Along with information transmits synthesization, broadband, intelligent, digitized development, various lines more and more is arranged together in the concentrated area in the integration laying line system engineering of building and groups of building, high-rate data stream is subject to the mutual interference of frequency electromagnetism, and electromagnetic interference (EMI) and electromagnetic compatibility (EMC) problem are day by day obvious.
Early stage electromangnetic spectrum mainly uses metal and matrix material thereof, and this class material has good shielding properties, but its elasticity is low, density is large, perishable, expensive, and effectiveness of shielding also is difficult to regulate.
Electromagnetic Shielding Polymer Materials has obtained fast development in recent years, take insulating polymer as matrix, add therein a certain amount of material with excellent conductive capability and make polymkeric substance obtain conductive capability, also can select molecular structure itself can conduct electricity or pass through the polymkeric substance that doping treatment has conducting function afterwards.
Electric wire has two kinds in semi-conductive tape and semiconduction plastics usually with Electromagnetic Shielding Polymer Materials.Semi-conductive tape is that fabricbase is wrapped, therefore be difficult for wrappedly being convinced, and cause occurring between conductor, screen layer, the insulation layer inevitable space or pore, these spaces or pore are under the high-voltage field intensity, gas ionizes in the hole, the Damage to insulation layer, the generation tree branch discharge causes insulation layer to puncture at last then.Easy to use, the characteristics such as quality light, easy machine-shaping that the semiconduction plastics have.
The semiconduction plastics are actually many kinds series product with semiconductive shieldin material.Non-crosslinked type semiconductive shieldin material selects to have very large handiness at matrix resin, and easily processing can be satisfied the requirement of water tolerance, lower temperature resistance, oil-proofness etc., yet, because the temperature tolerance of this class semiconductive shieldin material is low, limited its range of application.Can be converted into after the moulding of crosslinkable type semiconductive shieldin material and have the material that cross-linked network has again certain deformability.Compare with the non-crosslinked type, crosslinkable type semiconductive shieldin material has that the destructive characteristics of eliminating stress is good, thermostability is better, machinery and electric property advantage preferably, and simultaneously, temperature tolerance also improves greatly.But because the restriction of composition and engineering, its weather resistance, thermotolerance and cost performance aspect are still waiting to improve.
The crosslinkable semiconductive shieldin material can be divided into by crosslinking process: (a) the chemically crosslinked type of superoxide; (b) the poach cross-linking type of silane; (c) high-energy radiation cross-linking type; Three kinds of crosslinking technologicals cut both ways.Peroxide crosslinking method purposes is wide, but needs to adopt High Temperature High Pressure; Silane poach crosslinking investment is little, and can obtain the removability more excellent than the peroxide crosslinking method, but complex manufacturing, must carry out crosslinkedly behind the extrusion molding in moisture, easily makes and produces moisture micropore on the insulation layer; The radiation crosslinking method is normal temperature crosslinked, and gained screen layer performance is good, and production efficiency is high, but needs expensive equipment, such as the electron rays accelerator etc.Therefore how to improve prescription, and then drive process optimization, produce tensile strength high, pliability is good, and the semi-conductive shielding material of weather resistance and Good Heat-resistance is important and have a problem of economic benefit with regard to becoming one.
Based on the weak point of existing electric wire with Electromagnetic Shielding Polymer Materials, the inventor has developed the present invention's " a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding prescription and production method thereof ".
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art technical problem to be solved is: a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding prescription and production method thereof are provided.This shielding cable material products tensile strength is high, and pliability is good, weather resistance and Good Heat-resistance.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding, its prescription is comprised of the material of following deal:
100 parts of meters of ethylene-vinyl acetate copolymer (EVA), the weight proportion of other component is:
Carbon black 35-50 part,
Trimethoxy silane coupling agent 1-4
Dispersion agent 1.2-1.8 part
Polyethylene wax 1-2 part
Calcium carbonate 15-25 part
Zinc oxide 2-3 part
Tritolyl Phosphate 1-2 part
Oxidation inhibitor 0.4-1.0 part
Linking agent 1-4 part
Additional crosslinker 0.3-0.7 part.
Vinyl acetate content is 17-19 in ethylene-vinyl acetate copolymer (EVA) resin, and Vicat softening point is at 65-69 ℃, elongation at break 〉=750.
Described carbon black is conduction oven process carbon black or extra conductive furuace carbon black.
Described linking agent is 4,4 '-two [uncle's fourth is crossed peroxy] n-butyl pentanoate, also can be dicumyl peroxide (DCP), 1,3 a pair ofs [tert-butyl peroxy base sec.-propyl] benzene, 2,5-dimethyl-2, two [tert-butyl peroxy base] hexanes of 5-and substitute, deal is constant.
Described additional crosslinker is that TAIC also can be the TAC replacement, and deal is constant.
Described dispersion agent is amine hydroxybenzene, also can be erucicamide and replaces, and deal is constant.
Described oxidation inhibitor is 4,4 '-thiobis [3 methy 6 tert butyl phenol].
A kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding prescription of the present invention and production method thereof may further comprise the steps:
The first step: carbon black 35-50 part, calcium carbonate 15-25 part, zinc oxide 2-3 part preheating and drying in high-speed mixer is removed the Trimethoxy silane coupling agent that in batches or once drops into 1-4 part behind the moisture to 80-85 ℃, and high-speed stirring is discharging after 5 minutes approximately, rapidly cooling.
Second step: with ethylene-vinyl acetate copolymer (EVA), dispersion agent 1.2-1.8 part polyethylene wax 1-2 part of 100 weight parts, Tritolyl Phosphate 1-2 part, it is mixing that oxidation inhibitor 0.4-1.0 part and the first step cooling material are together put into Banbury mixer, and the control temperature is 95-105 ℃ in the mixing process.Mixing time is controlled to be 10-15 minute.
The 3rd step: after the additional crosslinker of the linking agent of 1-4 weight part and 0.3-0.7 weight part added Banbury mixer insulation mixing, keep temperature-resistant, the banburying time is 10-12 minute, can obtain semi-conductive ethylene vinyl acetate (EVA) plastic for shielding.
The beneficial effect of a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding prescription of the present invention and production method thereof is:
(1) cost performance makes reason, in the situation that keep high electrical conductivity and corresponding tensile strength and elongation, adds a certain amount of filler, has kept the cheap of goods.
(2) surface lubrication, gloss is bright.
(3) goods have higher elasticity, can make between the cable different layers more to be close to, and can greatly reduce the concentrations of the partial charge that causes owing to a variety of causes, and the electromagnetic interference that causes thus (EMI) and electromagnetic compatibility (EMC) problem.
(4) material dispersion and lubrication are good, and goods are heat-resisting, weather resistance is good.
(5) conductivity is good, and can regulate volume specific resistance along with the change of corresponding material in the prescription.
The invention will be further described below in conjunction with embodiment:
Embodiment
The present invention implements like this:
Embodiment one:
Get 35 parts of conduction oven process carbon blacks; 20 parts in calcium carbonate; 2 parts in zinc oxide preheating and drying in high-speed mixer once drops into 1.5 parts Trimethoxy silane coupling agent to 80-85 ℃ after removing moisture, and high-speed stirring is discharging after 5 minutes approximately, rapidly cooling.
Get 100 parts of ethylene-vinyl acetate copolymers (EVA) as base-material, add therein 1.5 parts of amine hydroxybenzenes; 2 parts of polyethylene waxs; 1 part of Tritolyl Phosphate; 4,0.4 part of 4 '-thiobis [3 methy 6 tert butyl phenol]; Together put into Banbury mixer together with the first step cooling material after mixing mixing, the control temperature is 95-105 ℃ in the mixing process.Mixing time is controlled to be 10-15 minute.
With 4,2 parts of 4 '-two [uncle's fourth is crossed peroxy] n-butyl pentanoates; Behind 0.4 part of adding Banbury mixer of TAIC the insulation mixing, keep temperature-resistant, the banburying time is 10-12 minute, can obtain semi-conductive ethylene vinyl acetate (EVA) plastic for shielding.
Correlated performance: volume specific resistance 4.23 * 10
6Ω cm.
Embodiment two:
Conduction oven process carbon black in the example one is increased to 40 parts; Calcium carbonate is reduced to 15 parts; The Trimethoxy silane coupling agent increases to 2 parts, and the erucic acid acyl increases to 2 parts, and other material proportion is constant, and processing parameter also remains unchanged.
Correlated performance: volume specific resistance 3.16 * 10
4Ω cm.
Embodiment three:
Conduction oven process carbon black in the example two is increased to 48 parts; Other material proportion is constant, and processing parameter also remains unchanged.
Correlated performance: volume specific resistance 5.71 * 10
2Ω cm.
The above, it only is the preferred embodiment of a kind of its production method of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding of the present invention, be not that technical scope of the present invention is imposed any restrictions, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment does.
Claims (6)
1. semi-conductive ethylene vinyl acetate (EVA) plastic for shielding is characterized in that being comprised of the material of following deal:
100 parts of ethylene-vinyl acetate copolymers (EVA),
Carbon black 35-50 part;
Trimethoxy silane coupling agent 1-4 part;
Amine hydroxybenzene or erucicamide 1.2-1.8 part;
Polyethylene wax 1-2 part;
Calcium carbonate 15-25 part;
Zinc oxide 2-3 part;
Tritolyl Phosphate 1-2 part;
Oxidation inhibitor 0.4-1.0 part;
Linking agent 1-4 part;
Additional crosslinker 0.3-0.7 part.
2. a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding according to claim 1 is characterized in that carbon black is conduction furnace treated black or extra conductive furuace carbon black.
3. a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding according to claim 1, it is characterized in that described linking agent is 4,4 '-two [tert-butyl peroxy base] n-butyl pentanoate, dicumyl peroxide (DCP), 1, two [the tert-butyl peroxy base sec.-propyl] benzene or 2 of 3-, 5-dimethyl-2, two [tert-butyl peroxy base] hexanes of 5-.
4. a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding according to claim 1 is characterized in that described additional crosslinker is TAIC or TAC.
5. a kind of semi-conductive ethylene vinyl acetate (EVA) plastic for shielding according to claim 1 is characterized in that described oxidation inhibitor is 4,4 '-thiobis [3 methy 6 tert butyl phenol].
6. the production method of a semi-conductive ethylene vinyl acetate (EVA) plastic for shielding claimed in claim 1, it is characterized in that: the first step: in the raw materials pretreatment stage, carbon black 35-50 part, calcium carbonate 15-25 part, zinc oxide 2-3 part needs preheating and drying in high-speed mixer, and its preheating and drying temperature is 80-85 ℃, drop into afterwards high-speed stirring behind the Trimethoxy silane coupling agent of 1-4 part, time is controlled to be 5 minutes, afterwards discharging, rapidly cooling after the discharging; Second step: it is mixing that other material in will filling a prescription except linking agent and additional crosslinker and the first step cooling material are together put into Banbury mixer, and the control temperature is 95-105 ℃ in the mixing process, and mixing time is controlled to be 10-15 minute;
The 3rd step: after linking agent and additional crosslinker add Banbury mixer insulation mixing, keep temperature-resistant, the banburying time is 10-12 minute.
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| CN 201010168043 CN101885873B (en) | 2010-05-05 | 2010-05-05 | Semi-conductive ethylene vinyl acetate (EVA) plastic for shielding and production method thereof |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102134348B (en) * | 2010-12-14 | 2012-12-12 | 江苏德威新材料股份有限公司 | Polyolefin semiconductive composite for organosilane crosslinked overhead cables with rated voltage of less than or equal to 20KV |
| CN102336947B (en) * | 2011-07-19 | 2013-03-13 | 哈尔滨理工大学 | Preparation method of ultra-smooth semiconductive shielding material for high-voltage crosslinked polyethylene insulated cable |
| CN102360594B (en) * | 2011-10-08 | 2012-10-31 | 江苏亨通电力电缆有限公司 | Medium voltage torsion resistant cable for wind turbine |
| CN102779577B (en) * | 2012-07-27 | 2016-01-20 | 成都塑力电缆有限公司 | A kind of Multi-functional high-efficient waterproof electric cable |
| CN103396624B (en) * | 2013-07-15 | 2015-08-05 | 胡本巨 | A kind of antistatic PVC and preparation method thereof |
| CN105440421A (en) * | 2014-09-06 | 2016-03-30 | 浙江兴乐高分子材料有限公司 | Mine cable insulation shielding material and preparation method thereof |
| CN105524347A (en) * | 2016-01-23 | 2016-04-27 | 安徽华成电缆有限公司 | Formula of novel environment-friendly insulated rubber cable |
| CN109637740B (en) * | 2018-10-29 | 2020-08-25 | 上海亿氢科技有限公司 | Preparation method of composite conductive filler |
| CN110128972A (en) * | 2019-04-20 | 2019-08-16 | 高邮市金国电缆材料厂有限公司 | A kind of conductor thermoplastics type's semiconductive shieldin material and preparation method thereof |
| CN114437451A (en) * | 2022-03-16 | 2022-05-06 | 浙江祥丰新材料科技有限公司 | Semiconductive EVA master batch for shielding and production method thereof |
| CN114940784A (en) * | 2022-03-16 | 2022-08-26 | 重庆大学 | Water-blocking cable semiconductive shielding layer material and preparation method thereof |
| CN115628771A (en) * | 2022-09-02 | 2023-01-20 | 南方电网科学研究院有限责任公司 | Method and system for designing and optimizing formula of semiconductive shielding material of high-voltage alternating-current cable |
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| CN101033309A (en) * | 2006-03-09 | 2007-09-12 | 中国石油化工股份有限公司 | Color masterbatch for polythene and preparing method thereof |
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| JP5437250B2 (en) * | 2007-09-25 | 2014-03-12 | ダウ グローバル テクノロジーズ エルエルシー | Styrenic polymer as a blending component to control adhesion between olefinic substrates |
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| CN101033309A (en) * | 2006-03-09 | 2007-09-12 | 中国石油化工股份有限公司 | Color masterbatch for polythene and preparing method thereof |
| CN101560313A (en) * | 2009-05-26 | 2009-10-21 | 上海科特高分子材料有限公司 | Flame-retardant master batch, novel macromolecular PTC thermistor containing flame-retardant master batch and manufacturing method thereof |
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Effective date of registration: 20210927 Address after: 241000 Fanchang County Economic Development Zone, Wuhu City, Anhui Province Patentee after: ANHUI LIANJIAXIANG SPECIAL CABLE Co.,Ltd. Address before: 518000, 2 floor, 113 Industrial Zone, Sha Tsui, Shenzhen, Guangdong, Futian District Patentee before: SHENZHEN LIANJIAXIANG SCIENCE & TECHNOLOGY Co.,Ltd. |