CN103554634A - High-voltage cable structure with insulating layer with excellent performance - Google Patents
High-voltage cable structure with insulating layer with excellent performance Download PDFInfo
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- CN103554634A CN103554634A CN201310508110.4A CN201310508110A CN103554634A CN 103554634 A CN103554634 A CN 103554634A CN 201310508110 A CN201310508110 A CN 201310508110A CN 103554634 A CN103554634 A CN 103554634A
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
- C08L23/0853—Ethylene vinyl acetate copolymers
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention provides a high-voltage cable structure with an insulating layer with excellent performance. The high-voltage cable structure is formed by a conductor in a core and a semi-conductive inner shielding layer, an insulating layer and a semi-conductive outer shielding layer which are coated on the periphery of the conductor from inside to outside in sequence, wherein the insulating layer comprises the following components in parts by weight: 100 parts of base material, 20-30 parts of inorganic filler I, 5-10 parts of inorganic filler II, 0.5-1.5 parts of carbon black, 3-5 parts of silane coupling agent, 3-5 parts of antioxidant, 1-3 parts of crosslinking agent, 0.2-0.5 part of crosslinking auxiliary and 0-2 parts of stripping agent.
Description
Technical field
The present invention relates to technical field of composite materials, a kind of high-tension cable structure with the insulation layer of excellent performance is particularly provided.
Background technology
Wires and cables industry is the important supporting industry of electric power and the two large pillar industries in national economy of communicating by letter, in national economy, there is extremely important status, wherein industry production total amount accounts for 4 ‰ to 5 ‰ of the total GDP in the whole nation, electric wire product plays the vital role of carrying the energy, transmission of information, is " blood vessel " and " nerve " of national economy.
Electric wire normally forms at conductor core wire outer cladding insulation layer, and polyvinyl chloride is simple with its technique manufacture, stable performance, lay conveniently, be not subject to the advantages such as restriction of high low head to be widely used in the insulating material of electric wire always, but along with people's environmental consciousness ground constantly strengthens, restriction for content of halogen in material is day by day harsh, in addition the intrinsic dielectric loss of polyvinyl chloride electrical wire and cable is large, working temperature is low, the high not shortcomings of voltage withstand class, and it is replaced by cross-linked polyolefin material emerging, that performance is more excellent gradually.
Yet as not halogen-containing cross-linked polyolefin material, for meeting the needs of cable insulation flame retardant properties, often in polyolefine, add the metal hydroxidess such as magnesium hydroxide, aluminium hydroxide, but the flame retardant effect that adds on the one hand metal hydroxides generation is less, often can not get desired flame retardant resistance, on the other hand, follow as improving the not addition of ever-increasing metal hydroxides of flame retardant properties, the mechanical propertys such as the unit elongation of cross-linked polyolefin material, tensile strength and resistance toheat etc. all can reduce significantly.
Moreover, the limitation of cross-linked polyolefin is also to exist due to the impurity such as linking agent residue decomposition in its system, micropore or the defect such as inhomogeneous, it tends to produce shrub shape defect under the effect of water or highfield, also be that the so-called water shadow of the trees rings, thereby cause disruptive strength to reduce, and finally cause electrical accident.
Therefore, develop and a kind ofly there is the excellent fire-retardant novel cable insulation simultaneously with excellent stable heat, mechanical property that blocks water and use cross-linked polyolefin material, there is important Research Significance and application prospect widely.
Summary of the invention
Object of the present invention is to provide a kind of excellent fire-retardant cross-linked polyolefin material prescription and high-tension cable structure of being made by it for the novel cable insulation simultaneously with excellent stable heat, mechanical property that block water that have.
Medium and high voltage cable structure of the present invention consists of the conductor of core and the semiconduction internal shield, insulation layer, the semiconduction external shielding layer that are coated on successively from inside to outside conductor periphery.
Cable insulation in the present invention is as follows with the formula of cross-linked polyolefin material: in weight part, 100 parts of base-materials, mineral filler one 20-30 part, mineral filler two 5-10 parts, carbon black 0.5-1.5 part, silane coupling agent 3-5 part, antioxidant 3-5 part, linking agent 1-3 part, crosslinking coagent 0.2-0.5 part, stripper 0-2 part.
Described base-material is mixed by polyethylene, polypropylene and vinyl-vinyl acetate copolymer, the weight percent of therein ethylene-vinyl acetate copolymer is 50-55%, polyacrylic weight percent is 15-20%, and in described vinyl-vinyl acetate copolymer, the content of vinyl-acetic ester is 45-50%;
Described mineral filler one is sintering kaolin, and median size is 1-2 μ m;
Described mineral filler two is four acicular type zinc oxide crystal whisker, and whisker is long 5-10 μ m on average;
The carbon content of described carbon black is at least 98%, and median size is 50-100nm, and maximum particle diameter is less than 250nm, and DBP is 100-150cc/100g;
Described silane coupling agent is vinyl three ('beta '-methoxy oxyethyl group) silane;
Described antioxidant is four-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters and poly-two (2-methyl-4-hydroxyl-5-tert.-butylbenzene) thioether, and the mass ratio of the two is 1:1;
Described linking agent is dicumyl peroxide;
Described crosslinking coagent is cyanacrylate;
Described stripper is silicone adhesive.
Reasonable design of the present invention the formula of cable insulation with cross-linked polyolefin material, by the coordinative role of each component and the most suitable content proportioning, obtained and there is fire-retardant blocking water and there is excellent stable heat, the novel cable insulation material of mechanical property simultaneously, and be applied to high-tension cable structure.
Embodiment
Embodiment 1.
By each given component proportion of table 1 (wherein base-material meet summation be 100 weight parts) prepare burden and by each raw material all dry to 100 ℃ standby; Then by the order of polypropylene (A), ethane-acetic acid ethyenyl ester (B), polyethylene, carbon black (C), mineral filler one (D), mineral filler two (E), silane coupling agent (F), antioxidant (G), stripper (H), successively add Banbury mixer to carry out melting mixing each raw material, mixing temperature is 200-220 ℃, and mixing time is 15-20min; After mixing discharging, through twin screw extruder extruding pelletization, described screw diameter is 32mm, and length-to-diameter ratio is 42; After granulation, enter high-speed kneading machine and spray linking agent (I) and crosslinking coagent (J) high-speed mixing, and control temperature at 140-160 ℃, the cooling product that obtains after mixing 10-15min.In wherein said vinyl-vinyl acetate copolymer, the content of vinyl-acetic ester is 48%.
Outside embodiment 2-3 and comparative example 1#-9# place formula are as shown in table 1, preparation method is all identical with embodiment 1.
Table 1
The performance parameter test of each embodiment is listed in table 2, and wherein volume specific resistance is measured respectively at 23 ℃ and 90 ℃ of two temperature, and peeling force is measured respectively at 25 ℃ and 50 ℃ of two temperature.As shown in Table 2:
Polypropylene makes up on the one hand the flexibility that vinyl-vinyl acetate copolymer causes, the problem of thermotolerance variation in system, also play on the other hand resistance to damage simultaneously, add the effect of thermal distortion, for bringing into play above-mentioned function, the ratio of polypropylene in base-material at least should reach 15%; But too much polypropylene addition is as surpassed 20% deficiency that can cause system mobility and bridging property, also can reduce flexibility, elongation, heat-resistant aging of system etc. simultaneously.
Vinyl-vinyl acetate copolymer can be brought into play well fire retardation in system, in order to reach required fire-retardant requirement, the content of ethane-acetic acid ethyenyl ester in base-material should reach 50%, but flexibility, intensity and thermotolerance that too much interpolation can cause system wretched insufficiency all.In vinyl-vinyl acetate copolymer, the content range of vinyl-acetic ester should be between 45-50%, even if very few content can cause having added enough vinyl-vinyl acetate copolymers and still be difficult to meet fire-retardant needs, but too much content can cause affinity with other components of base-material too poor and affect the bridging property of system and follow-up mechanical property.
The mineral filler of sintering kaolin has material impact for the fire-retardant and block-water performance of material, select the kaolin through oversintering, its block-water performance is especially excellent, the high-intensity effect of proposing has also been played in the interpolation of mineral filler simultaneously to a great extent, in order to reach the interpolation effect of this mineral filler, its addition at least should be 20 weight parts, but too much addition is as surpassed 30% mobility variation that can cause system, thereby cause the deterioration of the properties such as Tensile strength, heat aging, flexibility, block-water performance also declines to some extent simultaneously.It should be noted that the collaborative use of the silane coupling agent of sintering kaolin preferably and in system of the present invention, can effectively improve its dispersiveness like this, thereby strengthen its result of use.The kaolinic particle diameter of sintering is that 1-2 μ m has good dispersiveness, and good strengthening effect.
Four acicular type zinc oxide crystal whisker mineral filler is except playing the high-intensity effect of proposing, mainly also at it, can there is collaborative flame retardant effect with antioxidant, can in the situation that not adding a large amount of metal hydroxide combustion inhibitor, there is equally excellent flame retardant properties, in addition it also has the effect of raising system thermostability, for bringing into play its effectiveness, its addition at least should reach 5 weight parts, but too much interpolation may cause the decline of the performances such as tensile strength.The whisker of four acicular type zinc oxide crystal whisker is long 5-10 μ m on average, and this is conducive to its performance and proposes high-intensity effect.
The effect of carbon black is mainly that it can effectively be suppressed at the space charge occurring under the effect of water or highfield, thereby effectively solve the sharply destruction of material electrical property, for bringing into play above-mentioned effect, the addition of carbon black at least should reach 0.5 weight part, but too much interpolation is obviously unfavorable for the needs of insulating material integrated electronic performance.The carbon content of carbon black should at least reach 98%, otherwise can be because contain more O
2, H
2, the ash impurity that grades, and become the defect source that causes space charge to occur, be unfavorable on the contrary the improvement of material property.For bringing into play better effect, it is 50-100nm that the particle diameter of carbon black and DBP meet median size, and maximum particle diameter is less than 250nm, and DBP is that 100-150cc/100g is more suitable.
Silane coupling agent vinyl three ('beta '-methoxy oxyethyl group) silane has played obvious dispersion mineral filler and block-water effect in system, for bringing into play above-mentioned effect, silane coupling agent should at least add 3 weight parts, but its excessive interpolation can make the unit elongation of material and heat aging property decline, so its content should not surpass 5 weight parts.
Antioxidant four-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] to be 1:1 select mainly considers that it can bring into play cooperative flame retardant effect well with four acicular type zinc oxide crystal whisker for pentaerythritol ester and poly-two (2-methyl-4-hydroxyl-5-tert.-butylbenzene) thioether, and the effect of precrosslink is extruded in certain preventing, in order to bring into play this effect, its content at least should be 3 weight parts, when surpassing 5 weight part, flame retardant effect does not increase significantly, simultaneously may follow-up being cross-linked of severe inhibition.
Linking agent is obviously important for the interpolation of cross-linked polyolefin, but just as is known, its residue decomposition can become the defect source that space charge produces, therefore its content is unsuitable too high, but for being cross-linked of guarantee system, in system of the present invention, added necessary crosslinking coagent cyanacrylate, thereby can rationally address the above problem.
In order to improve the stripping performance of insulation layer and inside and outside screen layer etc., can in system, add a certain amount of silicone adhesive effect stripper, but its content can not surpass 2%, otherwise can reduce plasticity, the mechanical property of material.
Table 2
* the condition of I, immersion is 50 ℃ * 100 days; The condition of II, heat aging is 125 ℃ * 7 days
For formula system of the present invention, according to the order of polypropylene, ethane-acetic acid ethyenyl ester, polyethylene, carbon black, mineral filler one, mineral filler two, silane coupling agent, antioxidant, stripper, successively add Banbury mixer to carry out melting mixing each raw material as far as possible, so that mixing more even, mixing abundant for guaranteeing, mixing temperature is 200-220 ℃, and mixing time is 15-20min; After mixing discharging, through twin screw extruder extruding pelletization, described screw diameter is 32mm, and length-to-diameter ratio is 42, to guarantee the effect of extruding of material; After granulation, enter high-speed kneading machine and spray linking agent (I) and crosslinking coagent (J) high-speed mixing, and control temperature at 140-160 ℃, the cooling product that obtains after mixing 10-15min, to guarantee material degree of crosslinking.Through the formula of the present invention design, be aided with described preparation technology parameter, can obtain and there is fire-retardant blocking water and there is excellent stable heat, the novel cable insulation material of mechanical property simultaneously.
By the cable insulation in the present invention with material by coextrusion processes, prepare by the conductor of core and be coated on successively from inside to outside the high-tension cable structure that semiconduction internal shield, insulation layer, the semiconduction external shielding layer of conductor periphery form.
Claims (2)
1. a high-tension cable structure with the insulation layer of excellent performance, described high-tension cable structure consists of the conductor of core and the semiconduction internal shield, insulation layer, the semiconduction external shielding layer that are coated on successively from inside to outside conductor periphery,
The insulation layer that it is characterized in that described excellent performance has following composition: in weight part, 100 parts of base-materials, mineral filler one 20-30 part, mineral filler two 5-10 parts, carbon black 0.5-1.5 part, silane coupling agent 3-5 part, antioxidant 3-5 part, linking agent 1-3 part, crosslinking coagent 0.2-0.5 part, stripper 0-2 part.
2. high-tension cable structure as claimed in claim 1, is characterized in that:
Described base-material is mixed by polyethylene, polypropylene and vinyl-vinyl acetate copolymer, the weight percent of therein ethylene-vinyl acetate copolymer is 50-55%, polyacrylic weight percent is 15-20%, and in described vinyl-vinyl acetate copolymer, the content of vinyl-acetic ester is 45-50%;
Described mineral filler one is sintering kaolin, and median size is 1-2 μ m;
Described mineral filler two is four acicular type zinc oxide crystal whisker, and whisker is long 5-10 μ m on average;
The carbon content of described carbon black is at least 98%, and median size is 50-100nm, and maximum particle diameter is less than 250nm, and DBP is 100-150cc/100g;
Described silane coupling agent is vinyl three ('beta '-methoxy oxyethyl group) silane;
Described antioxidant is four-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters and poly-two (2-methyl-4-hydroxyl-5-tert.-butylbenzene) thioether, and the mass ratio of the two is 1:1;
Described linking agent is dicumyl peroxide;
Described crosslinking coagent is cyanacrylate;
Described stripper is silicone adhesive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310508110.4A CN103554634B (en) | 2013-10-24 | 2013-10-24 | A kind of High-voltage cable structure with the insulation layer of excellent performance |
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| CN201310508110.4A CN103554634B (en) | 2013-10-24 | 2013-10-24 | A kind of High-voltage cable structure with the insulation layer of excellent performance |
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| CN103554634B CN103554634B (en) | 2015-09-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070393A (en) * | 2015-07-26 | 2015-11-18 | 尹红 | A kind of high voltage cable for power system |
| CN107841042A (en) * | 2017-11-03 | 2018-03-27 | 成都乐维斯科技有限公司 | A kind of preparation method of novel cable insulating materials |
| CN107880383A (en) * | 2017-11-03 | 2018-04-06 | 成都乐维斯科技有限公司 | A kind of novel cable insulating materials |
| CN109370040A (en) * | 2018-07-31 | 2019-02-22 | 中广核高新核材科技（苏州）有限公司 | Motor lead-in flame-proof polyolefine cable material of resisting impregnation paint and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730531A (en) * | 2005-08-07 | 2006-02-08 | 无锡市沪安电线电缆有限公司 | Improved crosslinked polyetylene insulated material and power cable for 6KV and above |
| CN102617942A (en) * | 2012-03-30 | 2012-08-01 | 无锡市远登电缆有限公司 | Ethylene-propylene-diene monomer rubber used for manufacturing wind energy cable and preparation method thereof |
-
2013
- 2013-10-24 CN CN201310508110.4A patent/CN103554634B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730531A (en) * | 2005-08-07 | 2006-02-08 | 无锡市沪安电线电缆有限公司 | Improved crosslinked polyetylene insulated material and power cable for 6KV and above |
| CN102617942A (en) * | 2012-03-30 | 2012-08-01 | 无锡市远登电缆有限公司 | Ethylene-propylene-diene monomer rubber used for manufacturing wind energy cable and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070393A (en) * | 2015-07-26 | 2015-11-18 | 尹红 | A kind of high voltage cable for power system |
| CN106251971A (en) * | 2015-07-26 | 2016-12-21 | 常熟市谷雷特机械产品设计有限公司 | A kind of high tension cable |
| CN106298036A (en) * | 2015-07-26 | 2017-01-04 | 常熟市谷雷特机械产品设计有限公司 | A kind of power system high tension cable |
| CN105070393B (en) * | 2015-07-26 | 2017-03-22 | 陕西永光电力电缆制造有限公司 | A kind of high voltage cable for power system |
| CN107841042A (en) * | 2017-11-03 | 2018-03-27 | 成都乐维斯科技有限公司 | A kind of preparation method of novel cable insulating materials |
| CN107880383A (en) * | 2017-11-03 | 2018-04-06 | 成都乐维斯科技有限公司 | A kind of novel cable insulating materials |
| CN109370040A (en) * | 2018-07-31 | 2019-02-22 | 中广核高新核材科技（苏州）有限公司 | Motor lead-in flame-proof polyolefine cable material of resisting impregnation paint and preparation method thereof |
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Granted publication date: 20150909 Termination date: 20171024 |