CN101891915A - Strippable semi-conductive shielding material for insulation of cross-linked cable - Google Patents
Strippable semi-conductive shielding material for insulation of cross-linked cable Download PDFInfo
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- CN101891915A CN101891915A CN 201010217916 CN201010217916A CN101891915A CN 101891915 A CN101891915 A CN 101891915A CN 201010217916 CN201010217916 CN 201010217916 CN 201010217916 A CN201010217916 A CN 201010217916A CN 101891915 A CN101891915 A CN 101891915A
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Abstract
The invention discloses a strippable semi-conductive shielding material for insulation of a cross-linked cable which comprises the following components by mass percentage: 45%-60% of EVA material, 30%-40% of carbon black, 6%-10% of plasticizer, 1%-2.5% of cross-linking agent and 0.1%-1% of antioxidant, wherein, the EVA material is a copolymer of ethylene and vinyl acetate based on an adjustable ratio; the cross-linking agent is hyperoxide; and the plasticizer comprises one or more of oil, paraffin, stearic acid, zinc stearate and polyethylene wax. The shielding material is prepared by sequentially feeding and internally mixing components in a clear internal mixer, extruding and granulating by an extruder, and finally adding the cross-linking agent. The invention obviously enhances the electrical performance of the semi-conductive shielding material product for insulation of the cross-linked polyethylene insulated cable applied to 35kV and below 35kV, eliminates scorching phenomenon during the use process of the product and improves residual on an insulating surface.
Description
Technical field
The present invention relates to insulation and conducing composite material technical field, relate in particular to a kind of cross-linked polyethylene insulated cable insulation cross-linking type strippable semi-conductive shielding material that is used for.
Background technology
In 35KV and following power transmission and distribution system, cross-linked polyethylene insulated cable is widely used in departments such as electric power, building, industrial and mineral, metallurgy, oil, chemical industry, traffic, has substituted the oil-impregnated paper insulation insulated power cable fully and has partly substituted the polyvinyl chloride insulation power cable.But all need conductor and insulation to use the rubber semi-conductive shielding material, and there are following many shortcomings in traditional peroxide crosslinking type semiconductive shieldin material in the production process of reality: (1), the continuous use easily produce the incipient scorch phenomenon; (2), the Surface Insulation residue is many; (3), electric property is stable inadequately, show that 20 ℃ of lower volume resistivity of normal temperature are normal, but the volume specific resistance behind the stranding is difficult to meet the regulation of country to shielding material mechanical-physical and electric property; (4), be used to improve the incipient scorch inhibitor of incipient scorch phenomenon and to eliminate other added ingredients cost of incipient scorch inhibitor negative effect higher.Because one of member that semiconductive shieldin material is a medium and high voltage cable must be adopted, and, the continuous working ability of semiconductive shieldin material is had higher requirement for adapting to current higher crosslinked cable market demand.
Summary of the invention
Defective in view of above-mentioned prior art existence, the objective of the invention is to propose a kind of strippable semi-conductive shielding material for insulation of cross-linked cable and production technique thereof, graphitized carbon black is disperseed in the EVA material as far as possible equably, from shielding material component and the many-sided technological improvement of process recipes is prerequisite, reduces in the use of shielding material because problems such as the product rejection that the incipient scorch phenomenon causes, energy consumptions.
Above-mentioned first purpose of the present invention will be achieved by the following technical programs:
Strippable semi-conductive shielding material for insulation of cross-linked cable, it is characterized in that, calculating component by mass is: 45%～60% EVA material, 30%～40% carbon black, 6%～10% softening agent, 1%～2.5% linking agent, and 0.1%～1% oxidation inhibitor;
The adjustable ratio multipolymer that described EVA material is ethene and vinyl acetate between to for plastic; Described linking agent is a superoxide; Described softening agent comprises one or more mixing in oil, paraffin, stearic acid, Zinic stearas, the polyethylene wax;
Described shielding material is fed intake according to the order of sequence by recipe ingredient in clean internal mixer and carries out banburying, again through the forcing machine extruding pelletization, adds linking agent then and makes.
Above-mentioned cross-linked cable insulating peroxide crosslinking type semiconductive shieldin material, it is characterized in that, calculating component by mass is: 48%～52% EVA material, 36%～39% carbon black, 7%～9% softening agent, 1.2%～1.7% linking agent, and 0.1%～1% oxidation inhibitor;
The adjustable ratio multipolymer that described EVA material is ethene and vinyl acetate between to for plastic; Described linking agent is a superoxide; Described softening agent comprises one or more mixing in oil, paraffin, stearic acid, Zinic stearas, the polyethylene wax;
Described shielding material is fed intake according to the order of sequence by recipe ingredient in clean internal mixer and carries out banburying, again through the forcing machine extruding pelletization, adds linking agent then and makes.
Above-mentioned second purpose of the present invention, the crosslinked cable conductor production technique of peroxide crosslinking type semiconductive shieldin material is characterized in that described internal mixing and plasticizing granulation comprises step:
I, examine raw material type and quantity by recipe ingredient;
II, startup Banbury mixer power supply carry out preheating, and set 130 ℃ banburying temperature;
III, adjustment pre-operation electric current 160A, and set 8～11 minutes banburying time;
IV, raw material is dropped into the Banbury mixer tempering tank by the order of EVA material, carbon black, auxiliary agent;
The banburying of pressurizeing of V, airtight tempering tank, and opening time metering switch simultaneously;
VI, timing are carried out extruding pelletization after finishing, and add linking agent by the imbibition method.
Strippable semi-conductive shielding material for insulation of cross-linked cable of the present invention, its outstanding effect is:
By in the semiconductive shieldin material production process, proportioning raw materials is especially added the formulated component of auxiliary agent, and in the internal mixing and plasticizing process processing temperature, time and pressure and other parameters are controlled, significantly promoted and be applied to 35KV and the insulation of following cross-linked polyethylene insulated cable thereof electric property with external shield material product, eliminate the incipient scorch phenomenon in the product use, and it is residual to have improved Surface Insulation.
Following constipation closes embodiment, the specific embodiment of the present invention is described in further detail, so that technical solution of the present invention is easier to understand, grasp.
Embodiment
The present invention is for improving the incipient scorch phenomenon in the continuous use of tradition shielding material, and Surface Insulation is residual, improves the electric property of shielding material product simultaneously, and then improves the widespread use of cross-linked polyethylene insulated cable in 35KV and following power transmission and distribution system thereof.Be to realize this purpose, one aspect of the present invention is furtherd investigate on proportioning raw materials, under the situation that main raw material(s) can not be substituted, selects for use and try to join to have obtained a kind of brand-new and shielding material processing formula with outstanding effect.It calculates component by mass: 45%～60% EVA material, 30%～40% carbon black, 6%～10% softening agent, 1%～2.5% linking agent, and 0.1%～1% oxidation inhibitor.
Wherein, the EVA material is the adjustable ratio multipolymer of ethene and vinyl acetate between to for plastic, is a kind of novel environmentally-friendly plastic foam material in the product of rubber and plastic, has advantages such as good buffering, antidetonation, heat insulation, moistureproof, resist chemical, nontoxic and exclusion of water.
This carbon black has all multi-usages in plastic industry, comprise being used for painted, antiultraviolet or conduction etc.So, in the process of carrying out semiconductive shieldin material production, select suitable graphitized carbon black raw material, important step is absolutely necessary.And the optional carbon black types of the present invention is a graphitized carbon black
This linking agent and carbon black, EVA are identical, are the conventional main raw material of producing semiconductive shieldin material, and linking agent is a peroxide.
In addition, this softening agent comprises one or more mixing in oil, paraffin, stearic acid, Zinic stearas, the polyethylene wax; Optional Hinered phenols of this oxidation inhibitor and auxiliary antioxidant are commercially available conventional industrial chemicals.
Embodiment one
The quality proportioning of shielding material is: 45% EVA material, 40% carbon black, 10% softening agent, 2.5% linking agent, 1% oxidation inhibitor and 1.5% other add ingredients.
Wherein the source of purchasing of EVA material is: Dupont, Hyundai, French atropic or German BASF.The trade mark comprises respectively: 260, and VS410, VA600,2805,6110M; Graphitized carbon black is from Cabot, and moral is Sha admittedly, and middle rubber or eastern forever chemical industry are purchased and obtained; Linking agent is: dicumyl peroxide (DCP), and benzoyl peroxide (BPO) or vinyl triethoxyl silicon burn (A151); Oxidation inhibitor is β (3,5 di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester (claiming antioxidant 1076 again); Softening agent is any proportioning mixture of stearic acid and oil.
This internal mixing and plasticizing technological process is: examine raw material type and quantity by recipe ingredient earlier; Start the Banbury mixer power supply first and carry out preheating, and set 130 ℃ banburying temperature (can close behind continuous production two stoves), adjust pre-operation electric current 160A, and set single stove banburying time of 9 minutes; Then the order in strict accordance with EVA material, carbon black, auxiliary agent drops into the Banbury mixer tempering tank with raw material, and auxiliary agent comprises linking agent, oxidation inhibitor, softening agent and other interpolation ingredients; The banburying of pressurizeing of airtight then tempering tank, and open the switch that clocks simultaneously; Treat at last to carry out extruding pelletization after timing finishes, and add linking agent by the imbibition method.
Embodiment two
The quality proportioning of shielding material is: 55% EVA material, 36% carbon black, 7% softening agent, 1% linking agent, 0.5% oxidation inhibitor and 0.5% other add ingredients.
Wherein the source of purchasing of EVA material is: Dupont, Hyundai, French atropic or German BASF.The trade mark comprises respectively: 260, and VS410, VA600,2805,6110M; Graphitized carbon black is from Cabot, and moral is Sha admittedly, and middle rubber or eastern forever chemical industry are purchased and obtained; Linking agent is: dicumyl peroxide (DCP), and benzoyl peroxide (BPO) or vinyl triethoxyl silicon burn (A151); Oxidation inhibitor is 4,4 '-thiobis (3 methy 6 tert butyl phenol) (claiming antioxidant 300 again); Softening agent is any proportioning mixture of stearic acid and oil.
This internal mixing and plasticizing technological process is: examine raw material type and quantity by recipe ingredient earlier; Start the Banbury mixer power supply first and carry out preheating, and set 130 ℃ banburying temperature (can close behind continuous production two stoves), adjust pre-operation electric current 160A, and set single stove banburying time of 8 minutes; Then the order in strict accordance with EVA material, carbon black, auxiliary agent drops into the Banbury mixer tempering tank with raw material, and auxiliary agent comprises linking agent, oxidation inhibitor, softening agent and other interpolation ingredients; The banburying of pressurizeing of airtight then tempering tank, and open the switch that clocks simultaneously; Treat at last to carry out extruding pelletization after timing finishes, and add linking agent by the imbibition method.
Embodiment three
The quality proportioning of shielding material is: 48% EVA material, 39% carbon black, 10% softening agent, 1.5% linking agent, 0.5% oxidation inhibitor and 1% other add ingredients.
Wherein the source of purchasing of EVA material is: Dupont, Hyundai, French atropic or German BASF.The trade mark comprises respectively: 260, and VS410, VA600,2805,6110M; Graphitized carbon black is from Cabot, and moral is Sha admittedly, and middle rubber or eastern forever chemical industry are purchased and obtained; Linking agent is: dicumyl peroxide (DCP), and benzoyl peroxide (BPO) or vinyl triethoxyl silicon burn (A151); Oxidation inhibitor is (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester (antioxidant 1010); Softening agent is any proportioning mixture of stearic acid and oil.
This internal mixing and plasticizing technological process is: examine raw material type and quantity by recipe ingredient earlier; Start the Banbury mixer power supply first and carry out preheating, and set 130 ℃ banburying temperature (can close behind continuous production two stoves), adjust pre-operation electric current 160A, and set single stove banburying time of 10 minutes; Then the order in strict accordance with EVA material, carbon black, auxiliary agent drops into the Banbury mixer tempering tank with raw material, and auxiliary agent comprises linking agent, oxidation inhibitor, softening agent and other interpolation ingredients; The banburying of pressurizeing of airtight then tempering tank, and open the switch that clocks simultaneously; Treat at last to carry out extruding pelletization after timing finishes, and add linking agent by the imbibition method.
Embodiment four
The quality proportioning of shielding material is: 60% EVA material, 30% carbon black, 6% softening agent, 1.5% linking agent, 1% oxidation inhibitor and 1.5% other add ingredients.
Wherein the source of purchasing of EVA material is: Dupont, Hyundai, French atropic or German BASF.The trade mark comprises respectively: 260, and VS410, VA600,2805,6110M; Graphitized carbon black is from Cabot, and moral is Sha admittedly, and middle rubber or eastern forever chemical industry are purchased and obtained; Linking agent is: dicumyl peroxide (DCP), and benzoyl peroxide (BPO) or vinyl triethoxyl silicon burn (A151); The oxidation inhibitor model is 1010; Softening agent is any proportioning mixture of stearic acid and oil.
This internal mixing and plasticizing technological process is: examine raw material type and quantity by recipe ingredient earlier; Start the Banbury mixer power supply first and carry out preheating, and set 130 ℃ banburying temperature (can close behind continuous production two stoves), adjust pre-operation electric current 160A, and set single stove banburying time of 8 minutes; Then the order in strict accordance with EVA material, carbon black, auxiliary agent drops into the Banbury mixer tempering tank with raw material, and auxiliary agent comprises linking agent, oxidation inhibitor, softening agent and other interpolation ingredients; The banburying of pressurizeing of airtight then tempering tank, and open the switch that clocks simultaneously; Treat at last to carry out extruding pelletization after timing finishes, and add linking agent by the imbibition method.
Embodiment five
The quality proportioning of shielding material is: 52% EVA material, 33% carbon black, 10% softening agent, 2% linking agent, 1% oxidation inhibitor and 2% other add ingredients.
Wherein the source of purchasing of EVA material is: Dupont, Hyundai, French atropic or German BASF.The trade mark comprises respectively: 260, and VS410, VA600,2805,6110M; Graphitized carbon black is from Cabot, and moral is Sha admittedly, and middle rubber or eastern forever chemical industry are purchased and obtained; Linking agent is: dicumyl peroxide (DCP), and benzoyl peroxide (BPO) or vinyl triethoxyl silicon burn (A151); The oxidation inhibitor model is 300; Softening agent is any proportioning mixture of stearic acid and oil.
This internal mixing and plasticizing technological process is: examine raw material type and quantity by recipe ingredient earlier; Start the Banbury mixer power supply first and carry out preheating, and set 130 ℃ banburying temperature (can close behind continuous production two stoves), adjust pre-operation electric current 160A, and set single stove banburying time of 11 minutes; Then the order in strict accordance with EVA material, carbon black, auxiliary agent drops into the Banbury mixer tempering tank with raw material, and auxiliary agent comprises linking agent, oxidation inhibitor, softening agent and other interpolation ingredients; The banburying of pressurizeing of airtight then tempering tank, and open the switch that clocks simultaneously; Treat at last to carry out extruding pelletization after timing finishes, and add linking agent by the imbibition method.
Detailed introduction by above embodiment, in semiconductive shieldin material production process of the present invention, proportioning raw materials is especially added the formulated component of auxiliary agent, and there has been one to understand clearly to processing temperature, time and pressure and other parameters control in the internal mixing and plasticizing process, its special-effect is: significantly promoted this and be applied to 35KV and the following cross-linked polyethylene insulated cable conductor electric property that shields the material product thereof, eliminate the incipient scorch phenomenon in the product use, and improved the residual of Surface Insulation.Thereby make this shielding material product be easy to continuous production, satisfy the imbalance between supply and demand of crosslinked cable.
Claims (3)
1. strippable semi-conductive shielding material for insulation of cross-linked cable, it is characterized in that, calculating component by mass is: 45%～60% EVA material, 30%～40% carbon black, 6%～10% softening agent, 1%～2.5% linking agent, and 0.1%～1% oxidation inhibitor;
The adjustable ratio multipolymer that described EVA material is ethene and vinyl acetate between to for plastic; Described linking agent is a superoxide; Described softening agent comprises one or more mixing in oil, paraffin, stearic acid, Zinic stearas, the polyethylene wax;
Described shielding material is fed intake according to the order of sequence by recipe ingredient in clean internal mixer and carries out banburying, again through the forcing machine extruding pelletization, adds linking agent then and makes.
2. cross-linked cable insulating according to claim 1 peroxide crosslinking type semiconductive shieldin material, it is characterized in that, calculating component by mass is: 48%～52% EVA material, 36%～39% carbon black, 7%～9% softening agent, 1.2%～1.7% linking agent, and 0.1%～1% oxidation inhibitor;
The adjustable ratio multipolymer that described EVA material is ethene and vinyl acetate between to for plastic; Described linking agent is a superoxide; Described softening agent comprises one or more mixing in oil, paraffin, stearic acid, Zinic stearas, the polyethylene wax;
Described shielding material is fed intake according to the order of sequence by recipe ingredient in clean internal mixer and carries out banburying, again through the forcing machine extruding pelletization, adds linking agent then and makes.
3. the described crosslinked cable conductor of claim 1 is characterized in that described internal mixing and plasticizing comprises step with the production technique of peroxide crosslinking type semiconductive shieldin material:
I, examine raw material type and quantity by recipe ingredient;
II, startup Banbury mixer power supply carry out preheating, and set 130 ℃ banburying temperature;
III, adjustment pre-operation electric current 160A, and set 8～11 minutes banburying time;
IV, raw material is dropped into the Banbury mixer tempering tank by the order of EVA material, carbon black, auxiliary agent;
The banburying of pressurizeing of V, airtight tempering tank, and opening time metering switch simultaneously;
VI, timing are carried out extruding pelletization after finishing, and add linking agent by the imbibition method.
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| CN 201010217916 CN101891915A (en) | 2010-07-06 | 2010-07-06 | Strippable semi-conductive shielding material for insulation of cross-linked cable |
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| CN 201010217916 CN101891915A (en) | 2010-07-06 | 2010-07-06 | Strippable semi-conductive shielding material for insulation of cross-linked cable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336947A (en) * | 2011-07-19 | 2012-02-01 | 哈尔滨理工大学 | Preparation method of ultra-smooth semiconductive shielding material for high-voltage crosslinked polyethylene insulated cable |
| CN102746564A (en) * | 2012-06-04 | 2012-10-24 | 安徽扬天塑业科技有限公司 | Modified electric cable material with characteristics of high temperature resistance and corrosion resistance, and preparation method thereof |
| CN103545045A (en) * | 2013-10-24 | 2014-01-29 | 苏州市双鑫新材料科技有限公司 | High-voltage cable structure with semiconductive external shielding material capable of being peeled |
| CN103554802A (en) * | 2013-10-24 | 2014-02-05 | 苏州市双鑫新材料科技有限公司 | Formula of strippable semiconductive outer shielding material for cable |
| CN103739929A (en) * | 2014-01-10 | 2014-04-23 | 江苏中超电缆股份有限公司 | Graphene-containing polyolefin high semi-conductive shielding material for cable and preparation method thereof |
| CN103923377A (en) * | 2014-04-30 | 2014-07-16 | 威远凤凰高新材料有限责任公司 | Water-tight semi-conductive shielding material and preparation process thereof |
| CN104231411A (en) * | 2014-09-11 | 2014-12-24 | 常州大学 | Cross-linkable EVA-CCB semi-conductive composite material and preparation 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 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102336947A (en) * | 2011-07-19 | 2012-02-01 | 哈尔滨理工大学 | Preparation method of ultra-smooth semiconductive shielding material for high-voltage crosslinked polyethylene insulated cable |
| 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 |
| CN102746564A (en) * | 2012-06-04 | 2012-10-24 | 安徽扬天塑业科技有限公司 | Modified electric cable material with characteristics of high temperature resistance and corrosion resistance, and preparation method thereof |
| CN102746564B (en) * | 2012-06-04 | 2016-02-24 | 安徽扬天塑业科技有限公司 | Corrosion resistant CABLE MATERIALS of a kind of modified, high temperature resistant and preparation method thereof |
| CN103545045B (en) * | 2013-10-24 | 2015-12-02 | 苏州市双鑫新材料科技有限公司 | A kind of High-voltage cable structure with strippable semi-conductive external shield material |
| CN103554802B (en) * | 2013-10-24 | 2015-11-18 | 苏州市双鑫新材料科技有限公司 | A kind of formula of peelable cable semiconduction external shield material |
| CN103554802A (en) * | 2013-10-24 | 2014-02-05 | 苏州市双鑫新材料科技有限公司 | Formula of strippable semiconductive outer shielding material for cable |
| CN103545045A (en) * | 2013-10-24 | 2014-01-29 | 苏州市双鑫新材料科技有限公司 | High-voltage cable structure with semiconductive external shielding material capable of being peeled |
| CN103739929A (en) * | 2014-01-10 | 2014-04-23 | 江苏中超电缆股份有限公司 | Graphene-containing polyolefin high semi-conductive shielding material for cable and preparation method thereof |
| CN103739929B (en) * | 2014-01-10 | 2016-06-01 | 江苏中超电缆股份有限公司 | The polyolefine height semi-conductive screen material of cable graphene-containing and its preparation method |
| CN103923377A (en) * | 2014-04-30 | 2014-07-16 | 威远凤凰高新材料有限责任公司 | Water-tight semi-conductive shielding material and preparation process thereof |
| CN104231411A (en) * | 2014-09-11 | 2014-12-24 | 常州大学 | Cross-linkable EVA-CCB semi-conductive composite material and preparation 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 |
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Application publication date: 20101124 |