CN103545045A - High-voltage cable structure with semiconductive external shielding material capable of being peeled - Google Patents
High-voltage cable structure with semiconductive external shielding material capable of being peeled Download PDFInfo
- Publication number
- CN103545045A CN103545045A CN201310507210.5A CN201310507210A CN103545045A CN 103545045 A CN103545045 A CN 103545045A CN 201310507210 A CN201310507210 A CN 201310507210A CN 103545045 A CN103545045 A CN 103545045A
- Authority
- CN
- China
- Prior art keywords
- semiconductive
- content
- vinyl
- vinyl acetate
- shielding layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Conductive Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a formula of a semiconductive external shielding material capable of being peeled and a high-voltage cable structure prepared according to the formula. According to the formula, the semiconductive external shielding material capable of being peeled comprises, by weight, 100 parts of base material, 50-55 parts of conductive carbon black, 2-4 parts of stripping agent, 3-5 parts of antioxidant, 3-5 parts of cross-linking agent, 1-3 parts of reinforcing agent, 0.5-1 part of antiager and 10-12 parts of plasticizer. The high-voltage cable structure is composed of a conductor arranged in the core portion, a semiconductive internal shielding layer, an insulating layer and a semiconductive external shielding layer, wherein the periphery of the conductor is coated with the semiconductive internal shielding layer, the insulating layer and the semiconductive external shielding layer in sequence from inside to outside, the insulating layer is made of a cross-linking polyolefin material, and the semiconductive external shielding layer is made of the semiconductive external shielding material capable of being peeled.
Description
Technical field
The present invention relates to technical field of composite materials, a kind of strippable semi-conductive external shield material and high-tension cable structure prepared therefrom are 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 important function of carrying the energy, transmission of information, is " blood vessel " and " nerve " of national economy.
Insulated cable normally forms at conductor core wire outer cladding insulating barrier, and it is well-known, in higher high-voltage dc, insulated cable is fine uneven owing to existing, easily cause that partial discharge phenomenon occurs the space between insulating barrier and conductor and between insulating barrier and outer shielding layer, therefore for to make the Electric Field Distribution on cable insulation even, reduces the electric stress of insulating barrier, thereby prevent said corona discharge, conventionally need to semiconductive external shield material be set at its outer surface.
Existing semiconductive external shield material is mainly in the base-material of polymer composites, to add to have the conductive black of certain electric conductivity, add other auxiliary materials to prepare again, but the selection for base-material and auxiliary material, particularly for the formula of each composition, consensus not, and these components and content thereof have very important impact for follow-up product preparation process and the properties of product that finally obtain exactly.For example base-material adopts ethylene-propylene rubber, material that polyvinyl chloride equimolecular quantity is higher, its carrying capacity for filler is poor, in addition the addition of conductive black is large, thereby cause the mobility variation of material and cause the follow-up difficulty of extruding processing, and the vinyl-vinyl acetate copolymer generally using now as base-material exist such as poor with insulation displacement, extrude and add VA decomposes and produce particle on surface and then affect the defects such as properties of product in man-hour.
Therefore, obtain a kind of formula of the semiconductive external shield material with excellent and stable serviceability and the processing technology adapting with it, be that technical staff studies and improved emphasis always.
Summary of the invention
Object of the present invention is to provide a kind of novel semiconductive external shield material with excellent and stable serviceability and the high-tension cable structure being prepared by it.
High-tension cable structure in the present invention consists of the conductor of core and the semiconductive internal shield, insulating barrier, the semiconductive outer shielding layer that are coated on successively from inside to outside conductor periphery, wherein said insulating barrier is cross-linked polyolefin material, it is characterized in that described semiconductive outer shielding layer has following formula: in weight portion, 100 parts of base-materials, conductive black 50-55 part, remover 2-4 part, antioxidant 3-5 part, crosslinking agent 3-5 part, reinforcing agent 1-3 part, age resistor 0.5-1 part, plasticizer 10-12 part
Described base-material is mixed by ethylene propylene diene rubber and vinyl-vinyl acetate copolymer, and the ratio of the two is ethylene propylene diene rubber: vinyl-vinyl acetate copolymer=1:3-5,125 ℃ of Mooney viscosities of described ethylene propylene diene rubber (1+4) are 20-25, and in described vinyl-vinyl acetate copolymer, the content of vinyl acetate is 55-60%;
Described conductive black is the conductive black that is mixed with multi-walled carbon nano-tubes, the iodine number of carbon black is 100-200mg/g, and average grain diameter is 70-100nm, and DBP is 150-200cc/100g, the diameter of multi-walled carbon nano-tubes is 10-20nm, with respect to the content of carbon black, is 10-15%;
Described remover is OPE;
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-butyl benzene) thioether, and the mass ratio of the two is 1:1;
Described reinforcing agent is four acicular type zinc oxide crystal whisker;
Described crosslinking agent is cumyl peroxide;
Described age resistor is N-(1,3-dimethyl) butyl-N '-diphenyl-para-phenylene diamine;
Described plasticizer is zinc stearate.
Reasonable design of the present invention the formula of semiconductive external shield material, by the coordinative role of each component and the most suitable content proportioning, obtained there is excellent mechanical property, the semi-conductive shielding material of stripping performance, fire resistance, electric conductivity and temperature stabilization performance, and its application is prepared to the high-tension cable structure of excellent performance.
Embodiment
Embodiment 1.
By each given component proportion of table 1 prepare burden and by each raw material all dry to 100 ℃ standby; Then first ethylene propylene diene rubber (A) is plasticated, while plasticating, control roll temperature is at 70 ℃, and time 5-10min plasticates; By the order of vinyl-vinyl acetate copolymer (B), conductive black (C), plasticizer (D), reinforcing agent (E), age resistor (F), remover (G), antioxidant (H), successively add banbury to carry out each raw material subsequently mixing, mixing temperature is 100-120 ℃, and mixing time is 10-15min; Then the ethylene propylene diene rubber of plasticating is put in banbury and carried out melting mixing, melting temperature is 170-190 ℃, and mixing time is 5-10min; After mixing discharging, through single screw extrusion machine extruding pelletization, after granulation, enter high-speed kneading machine and spray crosslinking agent (I) high-speed mixing, and control temperature at 80-100 ℃, the cooling product that obtains after mixing 3-5min.Ethylene propylene diene rubber: vinyl-vinyl acetate copolymer=1:4 wherein, 125 ℃ of Mooney viscosities of described ethylene propylene diene rubber (1+4) are 23, in described vinyl-vinyl acetate copolymer, the content of vinyl acetate is 57%, in described conductive black, the iodine number of carbon black is 150mg/g, average grain diameter is 80nm, DBP is 180cc/100g, and the diameter of multi-walled carbon nano-tubes is 15nm, with respect to the content of carbon black, is 12%.
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 specific insulation 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:
The content of conductive black can not be too low, otherwise the wretched insufficiency that can cause the electric conductivity of product, but can not be too high, otherwise can cause the severe exacerbation of its specific insulation temperature stability, also can cause the deterioration of the mechanical properties such as intensity, percentage elongation and permanent deformation simultaneously.The content of the conductive black in the present invention's formula should be controlled at 50-55 weight portion
The content of reinforcing agent four acicular type zinc oxide crystal whisker at least should reach 1 weight portion, otherwise the tensile strength of product will be not enough, particularly can cause the severe exacerbation of permanent deformation; But had better not surpass 3 weight portions, thereby otherwise can cause that the rising of system viscosity is unfavorable for processing characteristics, cause on the contrary product mechanical property to worsen.
Adding for system of remover has vital effect with respect to the stripping performance of insulating barrier, the acid value of Tissuemat E has material impact for the intermiscibility of itself and cross-linked polyolefin, and the OPE acid value of selecting in this formula is at 20-30mg KOH/g, poorer for the compatibility of common cross-linked polyolefin insulating barrier than common Tissuemat E, in the process with ethylene propylene diene rubber use, can obtain well and insulating barrier at the stripping performance of normal temperature and high temperature, for giving full play to its effect, OPE be at least 2 weight portions, if but its content surpasses 4 weight portions for the not too many impact of stripping performance, can add to the difficulties for the shaping of product on the contrary.
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-butyl benzene) 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 portions, when surpassing 5 weight portion, flame retardant effect does not increase significantly, simultaneously may follow-up being cross-linked of severe inhibition.
The content of crosslinking agent should reach 3 weight portions, can make crosslinked fully not lower than 3 weight portions, is difficult to the dispersion that makes carbon black full and uniform, thereby causes the specific insulation of product too high, also can cause the formability of system to worsen simultaneously.But the content of crosslinking agent should not surpass 5 weight portions, otherwise can cause being cross-linked excessively yet, make product retractility severe exacerbation.
Table 2
Embodiment 4 and 5 formula are except ethylene propylene diene rubber: in the vinyl-vinyl acetate copolymer that the ratio of vinyl-vinyl acetate copolymer is respectively 1:3 and 1:5, select, the content of vinyl acetate is respectively 55% and 60%, multi-walled carbon nano-tubes is respectively 10% and 15% with respect to the content of carbon black, and all the other are identical with embodiment 2; Comparatively speaking, ethylene propylene diene rubber in comparative example 10#: the ratio of vinyl-vinyl acetate copolymer is 1:5.5, in comparative example 11#-12#, in vinyl-vinyl acetate copolymer, the content of vinyl acetate is respectively 50% and 65%, in comparative example 13#, multi-walled carbon nano-tubes is 5% with respect to the content of carbon black, all the other are all identical with embodiment 2, and test result is as shown in table 3.
Table 3
As shown in Table 3, ethylene propylene diene rubber: the proportioning of vinyl-vinyl acetate copolymer must be suitable, too low ethylene propylene diene rubber content is by being difficult to the effect of performance raising fissility, if but its too high levels may worsen mechanical property, thermal endurance etc.
In vinyl-vinyl acetate copolymer, the content of vinyl acetate is also the key factor that affects fissility, the too low system of content of vinyl acetate and the intermiscibility of insulating barrier are fine, and be difficult to peel off, its too high levels can cause its softening temperature to reduce, thereby makes high temperature fissility variation.
Under the prerequisite of conductive black mass conservation, the interpolation of multi-walled carbon nano-tubes obviously improved specific insulation with and the stability of temperature, simultaneously for mechanical property etc., also there is certain improvement, for giving full play to the effect of multi-walled carbon nano-tubes, its content at least should be 5%, if but surpassed 15%, its effect also could significantly change again.
For formula system of the present invention, ethylene propylene diene rubber must, in certain the plasticating of mixing front process, could meet the requirement of extruding, but that the temperature of plasticating is difficult for is too high, the time is unsuitable long, otherwise affect on the contrary its mixing behavior, through summing up with roller temperature at 70 ℃, the time 5-10min of plasticating is advisable; And can realize system by the reinforced empirical tests of the order of vinyl-vinyl acetate copolymer, conductive black, plasticizer, reinforcing agent, age resistor, remover, antioxidant, mix the most uniformly; The temperature of melting mixing has at 170-190 ℃ the extrusion performance that flows preferably, and mixing time was difficult for of a specified duration, otherwise precrosslink occurs while easily causing extruding; And to be verified be the most suitable selection that can obtain the cross-linking properties containing last mixing temperature and time.Through the formula of the present invention's design, be aided with described preparation technology parameter, can obtain the semiconductive external shield material with excellent mechanical property, stripping performance, fire resistance, electric conductivity and stability.
Semiconductive external shield material in the present invention by coextrusion processes, is prepared by the conductor of core and is coated on successively from inside to outside the high-tension cable structure that semiconductive internal shield, insulating barrier, the semiconductive outer shielding layer of conductor periphery form.
Claims (1)
1. a high-tension cable structure with strippable semi-conductive outer shielding layer, described high-tension cable structure consists of the conductor of core and the semiconductive internal shield, insulating barrier, the semiconductive outer shielding layer that are coated on successively from inside to outside conductor periphery, wherein said insulating barrier is cross-linked polyolefin material
It is characterized in that described strippable semi-conductive outer shielding layer has following formula: in weight portion, 100 parts of base-materials, conductive black 50-55 part, remover 2-4 part, antioxidant 3-5 part, crosslinking agent 3-5 part, reinforcing agent 1-3 part, age resistor 0.5-1 part, plasticizer 10-12 part.
Described base-material is mixed by ethylene propylene diene rubber and vinyl-vinyl acetate copolymer, and the ratio of the two is ethylene propylene diene rubber: vinyl-vinyl acetate copolymer=1:3-5,125 ℃ of Mooney viscosities of described ethylene propylene diene rubber (1+4) are 20-25, and in described vinyl-vinyl acetate copolymer, the content of vinyl acetate is 55-60%;
Described conductive black is the conductive black that is mixed with multi-walled carbon nano-tubes, the iodine number of carbon black is 100-200mg/g, and average grain diameter is 70-100nm, and DBP is 150-200cc/100g, the diameter of multi-walled carbon nano-tubes is 10-20nm, with respect to the content of carbon black, is 10-15%;
Described remover is OPE, and preferably its content is 3 weight portions;
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-butyl benzene) thioether, and the mass ratio of the two is 1:1;
Described reinforcing agent is four acicular type zinc oxide crystal whisker, and preferably its content is 2 weight portions;
Described crosslinking agent is cumyl peroxide;
Described age resistor is N-(1,3-dimethyl) butyl-N '-diphenyl-para-phenylene diamine;
Described plasticizer is zinc stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507210.5A CN103545045B (en) | 2013-10-24 | 2013-10-24 | A kind of High-voltage cable structure with strippable semi-conductive external shield material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507210.5A CN103545045B (en) | 2013-10-24 | 2013-10-24 | A kind of High-voltage cable structure with strippable semi-conductive external shield material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103545045A true CN103545045A (en) | 2014-01-29 |
| CN103545045B CN103545045B (en) | 2015-12-02 |
Family
ID=49968421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310507210.5A Expired - Fee Related CN103545045B (en) | 2013-10-24 | 2013-10-24 | A kind of High-voltage cable structure with strippable semi-conductive external shield material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103545045B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064275A (en) * | 2014-07-09 | 2014-09-24 | 常熟市谷雷特机械产品设计有限公司 | High voltage transmission cable |
| CN104530542A (en) * | 2014-12-12 | 2015-04-22 | 四川明星电缆股份有限公司 | Halogen-free aging-resistant strippable shielding material for cabtyre cables |
| CN109651720A (en) * | 2018-12-27 | 2019-04-19 | 尚纬股份有限公司 | A kind of nuclear reactor midium voltage cable conductor shielding material and preparation method thereof |
| CN109651719A (en) * | 2018-12-27 | 2019-04-19 | 尚纬股份有限公司 | A kind of nuclear reactor midium voltage cable peelable insulation shielding material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585943A (en) * | 2009-06-18 | 2009-11-25 | 上海交通大学 | Cable semi-conductive shielding material and preparation method thereof |
| CN101891916A (en) * | 2010-07-06 | 2010-11-24 | 苏州市双鑫新材料科技有限公司 | Peroxide crosslinked type semi-conductive screen material for crosslinked cable conductor |
| CN101891915A (en) * | 2010-07-06 | 2010-11-24 | 苏州市双鑫新材料科技有限公司 | Strippable semi-conductive shielding material for insulation of cross-linked cable |
-
2013
- 2013-10-24 CN CN201310507210.5A patent/CN103545045B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585943A (en) * | 2009-06-18 | 2009-11-25 | 上海交通大学 | Cable semi-conductive shielding material and preparation method thereof |
| CN101891916A (en) * | 2010-07-06 | 2010-11-24 | 苏州市双鑫新材料科技有限公司 | Peroxide crosslinked type semi-conductive screen material for crosslinked cable conductor |
| CN101891915A (en) * | 2010-07-06 | 2010-11-24 | 苏州市双鑫新材料科技有限公司 | Strippable semi-conductive shielding material for insulation of cross-linked cable |
Non-Patent Citations (2)
| Title |
|---|
| 余颖等: "碳纳米管对三元乙丙橡胶的影响", 《弹性体》 * |
| 孔宪武: "电力电缆用可剥离型半导电绝缘屏蔽料研制", 《电线电缆》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064275A (en) * | 2014-07-09 | 2014-09-24 | 常熟市谷雷特机械产品设计有限公司 | High voltage transmission cable |
| CN104064275B (en) * | 2014-07-09 | 2016-08-31 | 国网山东省电力公司菏泽供电公司 | A kind of high-voltage transmission cable |
| CN104530542A (en) * | 2014-12-12 | 2015-04-22 | 四川明星电缆股份有限公司 | Halogen-free aging-resistant strippable shielding material for cabtyre cables |
| CN104530542B (en) * | 2014-12-12 | 2017-01-04 | 四川明星电缆股份有限公司 | Halogen-free aging-resistant strippable shielding material for rubber sleeve cable |
| CN109651720A (en) * | 2018-12-27 | 2019-04-19 | 尚纬股份有限公司 | A kind of nuclear reactor midium voltage cable conductor shielding material and preparation method thereof |
| CN109651719A (en) * | 2018-12-27 | 2019-04-19 | 尚纬股份有限公司 | A kind of nuclear reactor midium voltage cable peelable insulation shielding material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103545045B (en) | 2015-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2641266C (en) | Semiconductive compositions | |
| CN103554633B (en) | A kind of High-voltage cable structure of excellent performance | |
| AU2002240535B2 (en) | Semiconducting shield compositions | |
| AU2002240535A1 (en) | Semiconducting shield compositions | |
| CN103545045B (en) | A kind of High-voltage cable structure with strippable semi-conductive external shield material | |
| CN103554802B (en) | A kind of formula of peelable cable semiconduction external shield material | |
| CN103531284B (en) | A kind of High-voltage cable structure with anti-incipient scorch cable semiconductive inner shield material | |
| CN103554635B (en) | A kind of preparation technology of strippable semi-conductive external shield material | |
| CN103524963B (en) | Formula of semiconductive internal shielding material for scorch preventing cable | |
| JP2014514399A (en) | Semiconductive shield composition having improved peelability | |
| CN110591216A (en) | Shielding material for conductive polypropylene power cable | |
| CN103524964B (en) | Preparation process of semiconductive internal shielding material for scorch preventing cable | |
| CA3029340C (en) | Semiconductive shield free of weld lines and protrusions | |
| EP0947998B1 (en) | Cable semiconducting shield compositions | |
| CN115850869B (en) | Polypropylene modified thermoplastic shielding material and preparation method thereof | |
| JP6564258B2 (en) | Semiconductive resin composition and power cable using the same | |
| CN107880414A (en) | 105 DEG C of level HPN parallel flexible cords haloflex fire retardant insulating type protective cover material | |
| CN114410022B (en) | Semiconductive rubber and preparation method thereof | |
| KR20180091555A (en) | Compound for a semiconductor layer of a power cable and power cable including the same | |
| CN105153633A (en) | High-strength insulating polymeric material and preparation method thereof | |
| CN114672108A (en) | Rubber sleeve cable three-layer co-extrusion external shielding strippable material and preparation method thereof | |
| CN108485142A (en) | A kind of cable for rolling stock of EVM and EPDM rubbers compound inslation | |
| CN108641226A (en) | A kind of Insulation Material, flexible reinforced insulated cable and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20171024 |