CN108864527A - Semi-conductive screen layer material and preparation method for high-tension cable polypropylene insulation - Google Patents
Semi-conductive screen layer material and preparation method for high-tension cable polypropylene insulation Download PDFInfo
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- CN108864527A CN108864527A CN201810537792.4A CN201810537792A CN108864527A CN 108864527 A CN108864527 A CN 108864527A CN 201810537792 A CN201810537792 A CN 201810537792A CN 108864527 A CN108864527 A CN 108864527A
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- 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
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- 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
- C08L23/06—Polyethene
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- 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- 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
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- C08K2201/001—Conductive additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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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- 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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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention discloses a kind of semi-conductive screen layer materials for high-tension cable polypropylene insulation, include according to parts by weight：20~50 parts of polypropylene base-material, 50~80 parts of elastomeric base, 20~55 parts of conductive black, 0.5~2.5 part of antioxidant of collaboration, 0.01~3.0 part of copper resistant agent and 0.5~10 part of lubrication dispersing agent；Wherein polypropylene base-material and totally 100 parts of elastomeric base, polypropylene base-material are that homopolypropylene and copolymer polypropylene press 0~10:The blend of 1 weight ratio mixing, and the melt index of homopolypropylene is 1.0~5.0g/10min, 1.0~5.0g/10min of melt index of copolymer polypropylene.Its technical effect is that：It stablizes with good mechanical performance, heat resistance, electric conductivity, and anti-copper is good, and non-crosslinked, extrusion linear speed is fast, environmentally protective, is easily recycled.The preparation method of the semi-conductive screen layer material for being used for high-tension cable polypropylene insulation is also disclosed in the present invention.
Description
Technical field
The present invention relates to a kind of semi-conductive screen layer materials and preparation method for high-tension cable polypropylene insulation.
Background technique
So far, the insulating layer material of the high voltage ac/dc power cable of China's manufacturing business operation is substantially
Using crosslinked polyethylene.Insulating layer and matched semi-conductive screen layer material all must be using the crosslinkings by crosslinking curing
Polyethylene.
In high-tension cable if without semiconductive shielding layer, insulating layer can not be used alone.Semiconductive shielding layer exists
Very important effect is played in High-voltage cable structure, semiconductive shielding layer is distributed in the interior outside of insulating layer, with insulation stratum boundary
Face be in close contact, interface smooth and seamless gap, can uniform electric field and avoid caused by gap dissociate electric discharge, operational safety is effectively ensured
And cable life.
Summary of the invention
It is a kind of for high-tension cable polypropylene insulation the purpose of the invention is to overcome the deficiencies of the prior art and provide
Semi-conductive screen layer material and preparation method, with good mechanical performance, heat resistance, electric conductivity is stablized, permanent worker
Make temperature not less than 110 DEG C, low temperature resistant reachable -25 DEG C and hereinafter, anti-copper is good, non-crosslinked, extrusion linear speed is fast, green ring
It protects, is easily recycled.
Realizing a kind of technical solution of above-mentioned purpose is：A kind of semiconductive shielding layer for high-tension cable polypropylene insulation
Material includes according to parts by weight：20~50 parts of polypropylene base-material, 50~80 parts of elastomeric base, 20~55 parts of conductive black,
0.5~2.5 part of antioxidant of collaboration, 0.01~3.0 part of copper resistant agent and 0.5~10 part of lubrication dispersing agent；Polypropylene base-material and elasticity
Totally 100 parts of body base-material；
Polypropylene base-material is that homopolypropylene and copolymer polypropylene press 0~10:1 mixed blend, and homopolypropylene
Melt index be 1.0~5.0g/10min, 1.0~5.0g/10min of melt index of copolymer polypropylene.
Further, elastomeric base is selected from least one therein：
Melt index is 2.0~10g/10min, density 0.87g/cm3Ethylene-octene copolymer；
Melt index is 2.0~10g/10min, and density is 0.86~0.88g/cm3Ethylene-butene copolymer；
EP rubbers；
Polyethylene and granulation EP rubbers are granulated blend, and wherein polyethylene is the height of 2.0~10g/10min of melt index
Density polyethylene or low density polyethylene (LDPE).
Further, the molar content of the ethylene in EP rubbers is 40~55%, and the Mooney of EP rubbers is viscous
Degree 20~40, the molar content of third body are 0~4.7%.
Further, collaboration antioxidant includes primary antioxidant and auxiliary antioxidant, primary antioxidant and auxiliary antioxidant
Weight ratio is 1：0~1.0, primary antioxidant 4,4'- thiobis (6- tert-butyl -3- methylphenol), auxiliary antioxidant three
[2.4- di-tert-butyl-phenyl] phosphite ester.
Further, lubrication dispersing agent is the organic amide class lubrication dispersing agent that polyethylene wax or fusing point are greater than 100 DEG C.
Further, according to parts by weight, this is used for the semi-conductive screen layer material of high-tension cable polypropylene insulation also
Contain not more than 1.0 parts of graphene.
Further, copper resistant agent is selected from N, N '-bis- [3- (3,5- di-tert-butyl-hydroxy phenyl) propionyl] hydrazine, N- water
Poplar fork-N '-salicylyl hydrazine, mercaptobenzimidazole, 2 mercapto benzimidazole, zinc salt of 2 mercaptobenzimidazole, 2- mercapto methyl
At least one of benzimidazole.
Realizing a kind of technical solution of above-mentioned purpose is：A kind of semiconductive shielding layer for high-tension cable polypropylene insulation
The preparation method of material, by polypropylene base-material, elastomeric base, conductive black, collaboration antioxidant, copper resistant agent and lubrication dispersing agent
Continuous mixing unit is added after mixing to be kneaded, extruding pelletization obtains the semi-conductive screen for high-tension cable polypropylene insulation
The pellet of layer material.
Realizing a kind of technical solution of above-mentioned purpose is：A kind of semiconductive shielding layer for high-tension cable polypropylene insulation
First stepless speed regulation mixer is added in elastomeric base, collaboration antioxidant, copper resistant agent and lubrication dispersing agent by the preparation method of material
It is kneaded, extruding pelletization obtains the pellet of rubber composition, then rubber composition, polypropylene base-material and conductive black are added
Continuous mixing unit is kneaded, and extruding pelletization obtains the grain of the semi-conductive screen layer material for high-tension cable polypropylene insulation
Material.
Further, the continuous mixing unit is more than mixing reciprocating engine, parallel dual-screw extruding machine, four combinations
One of continuous mixing unit.
Using a kind of technical solution of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention,
Include according to parts by weight：20~50 parts of polypropylene base-material, 50~80 parts of elastomeric base, 20~55 parts of conductive black, collaboration
0.5~2.5 part of antioxidant, 0.01~3.0 part of copper resistant agent and 0.5~10 part of lubrication dispersing agent；Polypropylene base-material and elastomer base
Totally 100 parts of material, polypropylene base-material is that homopolypropylene and copolymer polypropylene press 0~10:1 mixed blend, and homopolymerization poly- third
The melt index of alkene is 1.0~5.0g/10min, 1.0~5.0g/10min of melt index of copolymer polypropylene.Its technical effect
It is：It stablizes with good mechanical performance, heat resistance, electric conductivity, and long-term operating temperature is low temperature resistant not less than 110 DEG C
Reachable -25 DEG C and hereinafter, anti-copper is good, non-crosslinked, extrusion linear speed is fast, environmentally protective, is easily recycled.
Using a kind of preparation method of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention
Technical solution, polypropylene base-material, elastomeric base, conductive black, collaboration antioxidant, copper resistant agent and lubrication dispersing agent are mixed
Continuous mixing unit is added afterwards to be kneaded, extruding pelletization obtains the semiconductive shielding layer material for high-tension cable polypropylene insulation
The pellet of material.It is also able to achieve above-mentioned technical effect.
Using a kind of preparation method of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention
Technical solution, first elastomeric base, collaboration antioxidant, copper resistant agent and lubrication dispersing agent are added stepless speed regulation mixer and carried out
It is kneaded, extruding pelletization obtains the pellet of rubber composition, then rubber composition, polypropylene base-material and conductive black are added continuously
It is kneaded unit to be kneaded, extruding pelletization obtains the pellet of the semi-conductive screen layer material for high-tension cable polypropylene insulation.
It is also able to achieve above-mentioned technical effect.
Specific embodiment
The present inventor is in order to preferably understand technical solution of the present invention, below by specifically real
Example is applied to be described in detail：
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention is using polypropylene and elasticity
Body is blended, and forms thermoplastic elastomer (TPE), solves the disadvantage that polypropylene toughness and fragile under low temperature and be difficult to fill conductive black, adopts
With dystectic collaboration antioxidant, to avoid antioxidant under operating temperature migration and this is precipitated to be used for high-tension cable polypropylene exhausted
The semi-conductive screen layer material of edge makes carbon black fine dispersion using lubrication dispersing agent, and guarantees not migrate to insulating layer, i.e., not
Migrate out the semi-conductive screen layer material for high-tension cable polypropylene insulation.
According to parts by weight, a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention, is pressed
It include 20~50 parts of polypropylene base-material according to parts by weight, 50~80 parts of elastomeric base, 20~55 parts of conductive black, graphene 0
~1.0 parts, 0.5~2.5 part of antioxidant of collaboration, 0.01~3.0 part of copper resistant agent and 0.5~10 part of lubrication dispersing agent, wherein poly- third
Alkenyl material and totally 100 parts of elastomeric base.
Polypropylene base-material is that homopolypropylene and copolymer polypropylene press 0~10:1 mixed blend, and homopolypropylene
Melt index be 1.0~5.0g/10min, 1.0~5.0g/10min of melt index of copolymer polypropylene.
Elastomeric base is selected from ethylene-octene copolymer, ethylene-butene copolymer, EP rubbers and polyethylene and second
At least one of third rubber blend, the melt index melt index of ethylene-octene copolymer is 2.0~10g/10min, close
Degree is 0.87g/cm3, 2.0~10g/10min of melt index of ethylene-butene copolymer, density is 0.86~0.88g/cm3。
Polyethylene is high density polyethylene (HDPE) or low density polyethylene (LDPE), 2.0~10g/10min of melt index.In EP rubbers
The molar content of ethylene is 40~55%, Mooney viscosity 20~40, and the molar content of Third monomer is 0~4.7%.
Collaboration antioxidant is 4,4'- thiobis (6- tert-butyl -3- methylphenol) primary antioxidant and three [2.4- di-t-butyls
Phenyl] phosphite ester auxiliary antioxidant composition or similar antioxidant, cooperate with antioxidant in primary antioxidant and auxiliary antioxygen
The weight ratio 1 of agent：0~1.0, cooperate with the fusing point of antioxidant higher, collaboration antioxidant can also be mixed with rubber anti-aging agent, guarantees
The semiconductive shielding layer for cooperateing with antioxidant not migrate and be precipitated this for high-tension cable polypropylene insulation under cable operating temperature
Material.
Lubrication dispersing agent is that one of high-quality pure organic amide class lubrication dispersing agent or polyethylene wax or combination, fusing point are big
In 100 DEG C.
Conductive black is the mixing of conductive black or above two carbon black that vapour deposition process or Audit For Process are prepared
Object.
Graphene is the graphene by silane surfaces grafting processing.
Copper resistant agent is selected from N, N '-bis- [3- (3,5- di-tert-butyl-hydroxy phenyl) propionyl] hydrazine, N- salicylidene-N '-bigcatkin willow
In hydrazides, mercaptobenzimidazole, 2 mercapto benzimidazole, zinc salt of 2 mercaptobenzimidazole and 2 mercaptomethyl benzimidazole
At least one.
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention can by polypropylene base-material,
Elastomeric base, conductive black, graphene, collaboration antioxidant, copper resistant agent part and lubrication dispersing agent use continuous after directly mixing
It is kneaded unit, one of reciprocating engine, parallel dual-screw extruding machine is such as kneaded, is directly obtained by one-step method.
Wherein being kneaded reciprocating engine includes draw ratio 30:1 screw rod, four row's pins and No.1 feeding hopper, No. two feedings
Bucket and No. three feeding hoppers, No.1 feeding hopper, No. two feeding hoppers and No. three feeding hoppers are distributed along the axial direction of screw rod, are located at screw rod
Draw ratio 0:1,8:1 and 16:At 1, screw speed 300rpm, the total fill factor 0.65~0.75 of screw rod.
Parallel dual-screw extruding machine, including screw rod and No.1 feeding hopper, No. two feeding hoppers and No. three feeding hoppers, screw rod it is long
Diameter is than 44:1, No.1 feeding hopper, No. two feeding hoppers and No. three feeding hoppers are distributed along the axial direction of screw rod, are located at screw slenderness ratio
0:1,8:1 and 18:At 1, screw speed 400rpm, the total fill factor 0.6~0.7 of screw rod.
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention can be first by elastomer base
Expect to be kneaded in stepless speed regulation mixer after graphene, collaboration antioxidant, copper resistant agent and lubrication dispersing agent directly mix, and passes through
Rubber composition pellet is obtained after extruding pelletization, then rubber composition pellet is mixed with polypropylene base-material and conductive black,
It is kneaded in continuous mixing unit, extruding pelletization obtains a kind of semiconductive screen for high-tension cable polypropylene insulation of the invention
Cover the pellet of layer material.
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention is granulated steady using Melt Pump
It extrudes out, ultrafiltration, high-grade purification, Automatic Control technique, main technologic parameters and technical requirements：Melting temperature 150
~200 DEG C, 50~400rpm of rotor or screw speed, viscoelastic fluid is by the filter screens of 200~400 mesh before squeezing out, to turning
It is deionized water that son or screw rod, which carry out cooling cooling medium, and it is not low to carry out air-cooled and air cleaning grade to rotor or screw rod
Moisture content 200ppm or less in 10000, after pellet is dry.
It is illustrated below by specific embodiment：
Embodiment 1：
The semi-conductive screen layer material for high-tension cable polypropylene insulation of the present embodiment includes in parts by weight：
The copolymer polypropylene that the homopolypropylene and 20 parts of trades mark that 10 parts of trades mark are T30 are M180, forms 30 parts of polypropylene
Base-material.
The ethylene-octene copolymer that the low density polyethylene (LDPE) and 35 parts of trades mark that 35 parts of trades mark are LD608 are Tao Shi 8200, shape
At 70 parts of elastomeric bases.
The conductive black that 40 parts of trades mark are NJF.
0.2 part of 4,4'- thiobis (6- tert-butyl -3- methylphenol) and 0.1 part of conduct auxiliary as primary antioxidant is anti-
Three [2.4- di-tert-butyl-phenyl] phosphite esters of oxygen agent, form 0.3 part of collaboration antioxidant, cooperate in antioxidant primary antioxidant and
Cooperateing with antioxidant weight ratio is 1 to 0.5.
0.1 part of N- salicylidene-N '-salicylyl hydrazine and 0.1 part of zinc salt of 2 mercaptobenzimidazole, form 0.3 part of copper resistant agent.
The double oleamides of 0.5 part of ethylene as lubrication dispersing agent.
It is to be kneaded on reciprocating engine to carry out in single screw rod that it, which is prepared, belongs to one-step method, includes the following steps：
No.1 feeding hopper, addition polypropylene base-material, elastomeric base, collaboration antioxidant, copper resistant agent, lubrication dispersing agent, three
The conductive black of one third weight is added in number feeding hopper, and the conductive black of 2/3rds weight is added in No. two feeding hoppers, is kneaded
Viscoelastic fluid is obtained, it is 120 DEG C -150 DEG C -170 DEG C -190 DEG C -190 DEG C that single screw rod, which is kneaded the Temperature Distribution in reciprocating engine, spiral shell
The revolving speed 200rpm of bar；Viscoelastic fluid by the strainer of 400 mesh and is subjected to extruding pelletization, is obtained for high-tension cable poly- third
The pellet of the semi-conductive screen layer material of alkene insulation；Pellet is air-dried and is packed.
Embodiment 2
The semi-conductive screen layer material for high-tension cable polypropylene insulation of the present embodiment includes in parts by weight：
The copolymer polypropylene that 50 parts of trades mark are 800E, forms 50 parts of polypropylene base-materials.
The ethylene-octene copolymer that the high density polyethylene (HDPE) and 30 parts of trades mark that 20 parts of trades mark are 5000s are 8200 forms 50
Part elastomeric base.
The conductive black that 20 parts of trades mark are NJF.
0.5 part of 4,4'- thiobis (6- tert-butyl -3- methylphenol), as collaboration antioxidant.
0.5 part of N as copper resistant agent, N '-bis- [3- (3,5- di-tert-butyl-hydroxy phenyl) propionyl] hydrazine.
2.0 parts of polyethylene waxes as lubrication dispersing agent.
It is to be kneaded on reciprocating engine to carry out in single screw rod that it, which is prepared, belongs to one-step method, includes the following steps：
No.1 feeding hopper, addition polypropylene base-material, elastomeric base, collaboration antioxidant, copper resistant agent, lubrication dispersing agent, two
Number feeding hopper is added conductive black, and mixing obtains viscoelastic fluid, single screw rod be kneaded the Temperature Distribution in reciprocating engine be 150 DEG C-
190 DEG C -190 DEG C -200 DEG C -200 DEG C -200 DEG C -190 DEG C -180 DEG C, the revolving speed 400rpm of screw rod；Viscoelastic fluid is passed through
The strainer of 400 mesh；Extruding pelletization is carried out to viscoelastic fluid, obtains the semiconductive shielding layer for high-tension cable polypropylene insulation
The pellet of material；Pellet is air-dried and is packed.
Embodiment 3
The semi-conductive screen layer material that high-tension cable polypropylene insulation is used for for high-tension cable of the present embodiment, according to weight
Measuring number includes：
40 parts of trades mark as polypropylene base-material are the copolymer polypropylene of M180.
The high density polyethylene (HDPE) that 10 parts of trades mark are 2200J, the EP rubbers that 20 parts of trades mark are EP4045,30 parts of trades mark are
The ethylene-butene copolymer of DF740 forms 60 parts of elastomeric bases.
The graphene that 1.0 parts of trades mark are CNTS-010-0, the partial size of graphene are 0.3~8nm.
The conductive black that 40 parts of trades mark are NJF.
1.0 parts of 4,4'- thiobis (6- tert-butyl -3- methylphenol), 0.5 part of conduct auxiliary antioxygen as primary antioxidant
Three [2.4- di-tert-butyl-phenyl] phosphite esters of agent, form 1.5 parts of collaboration antioxidant, cooperate in antioxidant primary antioxidant and auxiliary
The weight ratio of aid anti-oxidants is 1 to 0.5.
0.5 part of 2 mercapto benzimidazole as copper resistant agent.
The double oleamides of 0.5 part of ethylene as lubrication dispersing agent.
Its preparation is to belong to two step method：
High density polyethylene (HDPE), EP rubbers, graphene, collaboration antioxidant, copper resistant agent and lubrication dispersing agent time are added first
Enter and is kneaded in stepless speed regulation mixer, the revolving speed 70rpm of stepless speed regulation closed-smelting machine rotor, 150 DEG C of melting temperature, and then with single
Screw extruder is granulated, and obtains evenly dispersed rubber composition pellet.
Single spiral shell is added in rubber composition pellet and polypropylene base-material and ethylene-butene copolymer and conductive black again
Bar is kneaded in reciprocating engine and is kneaded, and obtains viscoelastic fluid, and wherein rubber composition pellet, polypropylene base-material is added in No.1 feeding hopper
And ethylene-butene copolymer, the conductive black of No. two feeding hoppers 2/3rds weight of addition, No. three feeding hoppers additions three/
The conductive black of one weight, single screw rod are kneaded 150 DEG C -190 DEG C -190 DEG C -200 DEG C -200 DEG C -200 of Temperature Distribution of reciprocating engine
DEG C -190 DEG C -180 DEG C, single screw rod is kneaded the revolving speed 300rpm of the screw rod of reciprocating engine, and viscoelastic fluid is passed through to the filter of 400 mesh
Net；Viscoelastic fluid is granulated, the semi-conductive screen layer material for high-tension cable polypropylene insulation is obtained；To pellet into
Row air-dries and packaging.
Embodiment 4
The semi-conductive screen layer material for high-tension cable polypropylene insulation of the present embodiment includes according to parts by weight：
The copolymer polypropylene that 20 parts of trades mark are M180 forms polypropylene base-material.
The EP rubbers that low density polyethylene (LDPE) that 20 parts of trades mark are LD608,30 parts of trades mark are EP4045,30 parts of trades mark are
The ethylene-butene copolymer of DF740 forms 80 parts of elastomeric bases.
The conductive black that 55 parts of trades mark are NJF.
2.0 parts of 4,4'- thiobis (6- tert-butyl -3- methylphenol), as collaboration antioxidant.
0.5 part of zinc salt of 2 mercaptobenzimidazole as copper resistant agent.
3.0 parts of double oleamides of ethylene and 7.0 parts of polyethylene waxes, form 10 parts of lubrication dispersing agents.
Its preparation is to belong to two step method：
Low density polyethylene (LDPE), EP rubbers, collaboration antioxidant, copper resistant agent and lubrication dispersing agent are sequentially added first stepless
Mixer mixing is adjusted the speed, the revolving speed 70rpm of stepless speed regulation closed-smelting machine rotor, is and then squeezed out with single screw rod by 150 DEG C of melting temperature
Machine is granulated, and obtains evenly dispersed rubber composition pellet.
Single spiral shell is added in rubber composition pellet and polypropylene base-material and ethylene-butene copolymer and conductive black again
Bar is kneaded in reciprocating engine and is kneaded, and obtains viscoelastic fluid, and wherein rubber composition pellet, polypropylene base-material is added in No.1 feeding hopper
And ethylene-butene copolymer, the conductive black of No. two feeding hoppers 3/4ths weight of addition, No. three feeding hoppers additions four/
The conductive black of one weight, single screw rod are kneaded 150 DEG C -190 DEG C -190 DEG C -200 DEG C -200 DEG C -200 of Temperature Distribution of reciprocating engine
DEG C -190 DEG C -180 DEG C, single screw rod is kneaded the revolving speed 200rpm of the screw rod of reciprocating engine, and viscoelastic fluid is passed through to the filter of 200 mesh
Net；Viscoelastic fluid is granulated, the pellet of the semi-conductive screen layer material for high-tension cable polypropylene insulation is obtained；It is right
Pellet is air-dried and is packed.
Embodiment 5
The semi-conductive screen layer material for high-tension cable polypropylene insulation of the present embodiment includes according to parts by weight：
The copolymer polypropylene that 10 parts of trades mark are T30 homopolypropylene and 40 parts of trades mark are 800E forms 50 parts of polypropylene-bases
Material.
The ethylene-butene copolymer that EP rubbers that 20 parts of trades mark are EPT4045,30 parts of trades mark are DF740 forms 50 parts
Elastomeric base.
The conductive black that 30 parts of trades mark are NJF.
1.5 parts of 4,4'- thiobis (6- tert-butyl -3- methylphenol) and 0.5 part of conduct auxiliary as primary antioxidant are anti-
Three [2.4- di-tert-butyl-phenyl] phosphite esters of oxygen agent form 2.0 parts of primary antioxidant collaboration antioxidant, cooperate with main in antioxidant
The weight ratio of antioxidant and auxiliary antioxidant is 1 to 0.33.
0.1 part of zinc salt of 2 mercaptobenzimidazole as copper resistant agent.
0.3 part of double oleamide of ethylene and 5 parts of polyethylene waxes, form 5.3 parts of lubrication dispersing agents.
Its preparation is to belong to two step method：
Stepless speed regulation mixer is added in elastomeric base, collaboration antioxidant, copper resistant agent and lubrication dispersing agent time first to mix
Refining, the revolving speed 70rpm of stepless speed regulation closed-smelting machine rotor, are and then granulated with single screw extrusion machine, are obtained by 150 DEG C of melting temperature
Evenly dispersed rubber composition pellet.
Rubber composition pellet, polypropylene base-material and conductive black are added in parallel dual-screw extruding machine again and are kneaded,
Viscoelastic fluid is obtained, rubber composition pellet, polypropylene base-material and conductive black are all added from No.1 feeding hopper in the same direction
Double screw extruder, the Temperature Distribution of parallel dual-screw extruding machine is 150 DEG C -190 DEG C -190 DEG C -200 DEG C -200 DEG C -200 DEG C -
200 DEG C -190 DEG C, the revolving speed 300rpm of the screw rod of parallel dual-screw extruding machine, viscoelastic fluid is passed through to the strainer of 300 mesh；It is right
Viscoelastic fluid is granulated, and the pellet of the semi-conductive screen layer material for high-tension cable polypropylene insulation is obtained；To pellet
It is air-dried and is packed.
Embodiment 6
The semi-conductive screen layer material for high-tension cable polypropylene insulation in the present embodiment, including：
The homopolypropylene and 20 parts of trades mark that 10 parts of trades mark are T30 are 800E copolymer polypropylene polypropylene, form 30 parts and gather
Propylene base-material.
The ethylene-octene copolymer that the high density polyethylene (HDPE) and 50 parts of trades mark that 20 parts of trades mark are 2200J are 8200, composition 70
Part elastomeric base.
The conductive black that 40 parts of trades mark are NJF.
2.5 parts of 4,4'- thiobis (6- tert-butyl -3- methylphenol), as collaboration antioxidant.
0.1 part of mercapto methyl benzimidazole as copper resistant agent.
3.0 parts of double oleamide hydrazines of ethylene and 5.0 parts of polyethylene waxes, form 8.0 parts of lubrication dispersing agents.
Its preparation is to belong to one-step method：
By automatic weighing, by polypropylene base-material, elastomeric base, collaboration antioxidant, copper resistant agent and mercapto methyl benzo
Imidazoles is added single screw rod and mixes the No.1 feeding hopper of reciprocal mill, mixes the conductive black addition single screw rod of 2/3rds weight back and forth
No. two feeding hoppers of mill, after the conductive black of one third weight to be added to No. three feeding hoppers that single screw rod mixes reciprocal mill,
It mixes in reciprocal mill and is kneaded in single screw rod, obtain viscoelastic fluid, the Temperature Distribution that single screw rod mixes reciprocal mill is 150
DEG C -190 DEG C -190 DEG C -200 DEG C -200 DEG C -200 DEG C -190 DEG C -180 DEG C, the revolving speed that single screw rod mixes the screw rod of reciprocal mill is
Viscoelastic fluid is passed through the strainer of 300 mesh by 300rpm；Viscoelastic fluid is granulated, is obtained for high-tension cable poly- third
The pellet of the semi-conductive screen layer material of alkene insulation；Pellet is air-dried and is packed.
Below the semi-conductive screen layer material for high-tension cable polypropylene insulation to embodiment 1 into embodiment 6 into
Row performance detection, as shown in table 1.
Wherein heat distortion test is using method, test piece diameter or side length 12mm as defined in GB/T8815, thickness 1.25mm, circle
Column pressure head diameter 3.15mm, load 3.50N observe the variation of thickness, anti-copper test after being subjected to loading in one hour under test temperature
That test piece unilateral side folder copper sheet carries out burn-in test, i.e., at 135 DEG C 10 days it is non-brittle.
1 Examples 1 to 6 performance comparison table of table
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention, does not need to be crosslinked, as long as
Plasticating extrusion can produce high-tension cable, greatly improve extrusion linear speed, without gaseous by-product, not need subsequent
Degassing process process, while environmental pollution is not caused, it is generated without incipient scorch object, is almost not required to often shut down cleaning machine, than handing over
Joining PE cable has higher operating temperature, is conducive to improve the current-carrying capacity of cable, improves the temperature grade of cable, and subtracts
Small cross-sectional area of conductor, since it is non-cured plastic material, environmentally protective, recoverable.
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention, inside and outside insulating layer
Layer shielding, is made the three-layer co-extruded molding out of insulating layer with polypropylene, and the Performance Match with insulating layer has good conductive stable
Property and good rheological behavior, environmentally protective recoverable, heat-resisting and temperature grade and insulating layer phase made of polypropylene
When heat distortion temperature is greater than 130 DEG C, can be used for the semi-conductive screen layer material of 220kV and following high-pressure polypropylene cable, runs
Temperature is not less than 110 DEG C, low temperature resistant reachable -25 DEG C and following.
A kind of semi-conductive screen layer material for high-tension cable polypropylene insulation of the invention, solves polypropylene toughness
Poor, fragile under low temperature and filling conductive black is difficult to the shortcomings that dispersing, using dystectic collaboration antioxidant systems, to avoid collaboration
Migrate and be precipitated under antioxidant operating temperature, using suitable lubrication dispersing agent, make conductive black fine dispersion, and guarantee not to
Insulating layer migration.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as to the variations of above embodiments, becoming in spirit of the invention
Type will all be fallen within the scope of claims of the present invention.
Claims (10)
1. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation, it is characterised in that：It wraps according to parts by weight
It includes：20~50 parts of polypropylene base-material, 50~80 parts of elastomeric base, 20~55 parts of conductive black, collaboration antioxidant 0.5~2.5
Part, 0.01~3.0 part of copper resistant agent and 0.5~10 part of lubrication dispersing agent, wherein polypropylene base-material and totally 100 parts of elastomeric base；
Polypropylene base-material is that homopolypropylene and copolymer polypropylene press 0~10:1 mixed blend, and homopolypropylene is molten
Melting index is 1.0~5.0g/10min, 1.0~5.0g/10min of melt index of copolymer polypropylene.
2. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 1, feature
It is：
Elastomeric base is selected from least one therein：
Melt index is 2.0~10g/10min, density 0.87g/cm3Ethylene-octene copolymer；
Melt index is 2.0~10g/10min, and density is 0.86~0.88g/cm3Ethylene-butene copolymer；
EP rubbers；
Polyethylene and granulation EP rubbers are granulated blend, and wherein polyethylene is the high density of 2.0~10g/10min of melt index
Polyethylene or low density polyethylene (LDPE).
3. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 2, feature
It is：The molar content of ethylene in EP rubbers is 40~55%, the Mooney viscosity 20~40 of EP rubbers, third bullet
The molar content of body is 0~4.7%.
4. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 2, feature
It is：Collaboration antioxidant includes primary antioxidant and auxiliary antioxidant, and the weight ratio of primary antioxidant and auxiliary antioxidant is 1：0~
1.0, primary antioxidant 4,4'- thiobis (6- tert-butyl -3- methylphenol), auxiliary antioxidant is three [2.4- di-tert-butyls
Base] phosphite ester.
5. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 2, feature
It is：Lubrication dispersing agent is the organic amide class lubrication dispersing agent that polyethylene wax or fusing point are greater than 100 DEG C.
6. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 2, feature
It is：According to parts by weight, also contain not more than 1.0 parts of graphene.
7. a kind of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 2, it is characterised in that：
Copper resistant agent is selected from N, N '-bis- [3- (3,5- di-tert-butyl-hydroxy phenyl) propionyl] hydrazine, N- salicylidene-N '-salicylyl hydrazine, mercapto
Base benzimidazole, 2 mercapto benzimidazole, zinc salt of 2 mercaptobenzimidazole, at least one in 2 mercaptomethyl benzimidazole
Kind.
8. a kind of preparation method of the semi-conductive screen layer material for high-tension cable polypropylene insulation, it is characterised in that：It will gather
Continuous mixing is added after propylene base-material, elastomeric base, conductive black, collaboration antioxidant, copper resistant agent and lubrication dispersing agent mixing
Unit is kneaded, and extruding pelletization obtains the pellet of the semi-conductive screen layer material for high-tension cable polypropylene insulation.
9. a kind of preparation method of the semi-conductive screen layer material for high-tension cable polypropylene insulation, it is characterised in that：First will
Elastomeric base, collaboration antioxidant, copper resistant agent and lubrication dispersing agent are added stepless speed regulation mixer and are kneaded, and extruding pelletization obtains
It is mixed to the pellet of rubber composition, then by rubber composition, polypropylene base-material and conductive black addition continuous mixing unit
Refining, extruding pelletization obtain the pellet of the semi-conductive screen layer material for high-tension cable polypropylene insulation.
10. a kind of preparation of semi-conductive screen layer material for high-tension cable polypropylene insulation according to claim 9
Method, it is characterised in that：The continuous mixing unit is selected from that be kneaded reciprocating engine, parallel dual-screw extruding machine, four combinations above
One of continuous mixing unit.
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