CN105218894A - A kind of ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material - Google Patents
A kind of ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material Download PDFInfo
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Abstract
The invention discloses a kind of ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material, it is characterized in that, make raw material involved by effective constituent and weight is: paracril, 60-70 part, chlorinated polyethylene rubber, 30-40 part, cable powder, 30-50 part, graphitized carbon black A, 50-70 part, graphitized carbon black B, 10-30 part, magnesium oxide, 5-10 part, paraffin, 2-4 part, anti-aging agent, 2-8 part, o-phthalic acid dibutyl ester, 20-30 part, dispersion agent, 0.5-1 part, stearic acid, 2-5 part, vulcanizing agent, 1-8 part.This ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material has good heat oxygen aging resistance, resistance to ozone ageing, acid and alkali-resistance, chemical resistance, oil resistance excellence, the features such as removability is good, and rubber mobility is good, and cost is low.
Description
Technical field
The present invention relates to a kind of cable shield material, belong to chemical technology field, specifically a kind of ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material.
Background technology
Insulation layer semi-conductive shielding material is in the structure of middle high-pressure mine cable, electric field stress mainly in order to relax cable inside is concentrated, homogeneous insulation layers surface field stress distribution prevents shelf depreciation, the radial distribution improving cable internal electric field, to improve the electrical strength of cable, improves the work-ing life of cable.Consider from the electric property of long-time running ability and safety, unfailing performance of improving cable, in INVENTIONModern cable Structure and energy, require that insulation screen must possess rippability, and adopt and extrude technique.The existing insulation layer semi-conductive screen layer material mainly chloroprene rubber of polarity, chlorinated polyethylene rubber is made with calcium carbide ink, Shawinigan black etc. respectively, the semiconductive shielding layer mechanical property that chloroprene rubber makes can meet the requirements, oil resistance is good, but heat oxygen aging resistance, ozone-resistant aging property are poor, electric property is poor, cost is high; The semiconductive shielding layer mechanical property that chlorinated polyethylene rubber makes can meet the requirements, oil resistance is better, cost is lower, but heat oxygen aging resistance, ozone-resistant aging property are poor, acid-proof alkaline is poor, chemical resistance is poor, electric property is poor.The carrying capacity of above-mentioned materials to filler is poor, and along with a large amount of interpolations of graphitized carbon black, rubber mobility is deteriorated, and be difficult to extrude processing, insulation screen does not have removability.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, research and development one has good heat oxygen aging resistance, resistance to ozone ageing, acid and alkali-resistance, chemical resistance, oil resistance excellence, removability is good, rubber mobility is good, the ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material that cost is low.
Technical scheme of the present invention is: this ethylene-propylene rubber(EPR) cable strippable semi-conductive insulation shielding material, it is characterized in that, make raw material involved by effective constituent and weight is: paracril, 60-70 part, chlorinated polyethylene rubber, 30-40 part, cable powder, 30-50 part, Shawinigan black, 50-70 part, high wear-resistant carbon black, 10-30 part, magnesium oxide, 5-10 part, paraffin, 2-4 part, anti-aging agent, 2-8 part, o-phthalic acid dibutyl ester, 20-30 part, rubber disperse agent, 0.5-1 part, stearic acid, 2-5 part, vulcanizing agent, 1-8 part.
After the paracril got by above-mentioned raw materials and weight, chlorinated polyethylene rubber are mixed, enter Banbury mixer to plasticate, plasticate 3-4 minute, add magnesium oxide, anti-aging agent, stearic acid, stearic acid, rubber disperse agent mix, then add cable powder, Shawinigan black, high wear-resistant carbon black mix, add o-phthalic acid dibutyl ester (adding after weighting agent, strengthening agent material feeding) again to mix, finally add vulcanizing agent mixing, enter mill thin-pass bottom sheet and form ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material.
In the effective constituent involved by above-mentioned ethylene-propylene rubber(EPR) cable peelable insulation shielding formula:
Paracril is obtained through emulsion polymerization by divinyl and vinyl cyanide, and oil-proofness is fabulous, and wear resistance is higher, and thermotolerance is better, and bonding force is strong, and chemical-resistant stability is good, and processing characteristics is good, has excellent Physical Mechanical and processing characteristics.
Paracril elasticity is large, and plasticity is little, even if plasticity is also only about 0.20 after 2-3 section is plasticated, its chemical-resistant stability is good, processing characteristics is good, and along with its relative density of the acrylonitrile content in its structure increases, vulcanization rate is accelerated, tensile strength performance improves, the easy electric field polarization of cyano group in paracril, causes dielectric properties to decline, and paracril has excellent Physical Mechanical and processing characteristics simultaneously, therefore, be a kind of good semi-conductive shielding material.
Chlorinated polyethylene rubber is a kind of saturability rubber, has excellent heat oxygen aging resistance, resistance to ozone ageing, acid and alkali-resistance, chemical resistance, and its oil resistance is excellent, suitable with paracril; It contains chlorine element, has splendid flame retardant properties, nontoxic, not containing heavy metal, meets environmental requirement; It has high filling properties, good processability.
Cable powder adopts high-quality talc lump to process, and can increase the stability of product, increases tensile strength, shearing resistance, flexing intensity etc., has that whiteness is high, a dispersed feature such as by force of epigranular, is sprinkling upon in rubber item and cable, can prevents bonding as pulvis.
Shawinigan black is the acetylene being decomposed the refining purity more than 99% obtained by manufacture gas when calcium carbide route or petroleum naphtha (raw gasline) pyrolysis, and the carbon black obtained after continuous pyrolysis, as static inhibitor, is also used as electroconductive stuffing.
High wear-resistant carbon black is produced by Audit For Process, and particle diameter is 26 ~ 30nm.Specific surface area 80 ~ 110m2/g.Oxygen level O.5% ~ 1.0%.Hydrogen richness O.27% ~ O.34%, iodine absorption value 82g/kg, DBP absorption value 102cm3/100g, be a kind of reinforcing imparting sizing material preferably by force can, wear resistance and elasticity.
Magnesium oxide molecular formula is MgO, and odorless, tasteless, nontoxic white amorphous powder, at high temperature have excellent alkali resistance and electrical insulating property.
Paraffin is particulate state white solid, and chemical stability is good, and oleaginousness is moderate, has good protection against the tide and insulating property, and plasticity-is good.
Anti-aging agent is commonly called as 2,2,4-trimethylammonium-1, outward appearance is amber to brown sheet, and with aniline and acetone for raw material, toluene is dewatering agent, hydrochloric acid is catalyzer, polycondensation at temperature 130-140 DEG C, through neutralization &washing, air distillation, underpressure distillation, cuts into slices, gets product.There is preventing or suppress the factors disrupt product propertiess such as such as oxygen, heat, light, ozone, mechanical stress, heavy metal ion, the storage of prolongation goods and the Synergist S-421 95 in work-ing life.
Dioctyl phthalate (DOP) another name 1,2-phthalic acid two (2-ethylhexyl) ester, chemical formula is C24H38O4, is colourless transparent liquid, there is good over-all properties, good mixing property, plasticizing efficiency is high, and volatility is lower, low-temperature pliability is better, water-fast extraction, electric property is high, thermotolerance and weathering resistance good.
Rubber disperse agent is the mixture of the tensio-active agents such as the metallic soap compound of higher fatty acid, and light yellow or amber particle, has outstanding stepless action, Homogeneous phase mixing between the glue kind that can make opposed polarity, improves the performance of rubber item entirety; Extraordinary dissemination can be played to the dispersion of carbon black and other Synergist S-421 95s, thus improve its usefulness, and well can improve the consistency of Synergist S-421 95 in sizing material, reduce bloom; Effectively can promote the plasticity of sizing material, improve the mobility of sizing material, shorten mixing time, improve mixing and efficiency, the bubble extruded in sizing material can be greatly reduced, prevent from occurring in goods lacking material; Improve rate of extrusion and extrude the dimensional stability of sizing material, improving the stability between sizing material batch; Improve anti-reversion behaviour and the scorch safety of cross-linked rubber.
Stearic acid and octadecanoic acid, molecular formula C18H36O2, contributes to " coking " phenomenon prevented in the course of processing, as vulcanization leveller, also can be used as softening agent and tenderizer.
Vulcanizing agent can make rubber molecular chain play crosslinking reaction, and make linear molecule form tridimensional network, plasticity-reduces, the material that elastic strength increases.Can reversion be prevented, improve thermotolerance, reduce heat-dissipating, ageing-resistant, improve rubber and cord thread bounding force and cross-linked rubber modulus.
Magnesium oxide as inorganic accelerator effect, can improve the coke burning performance of sizing material in this formula, contributes to depositing of rubber unvulcanizate, and contributes to improving the tensile strength of cross-linked rubber, tensile modulus and hardness.A small amount of as adding during inorganic accelerator, obviously can shorten curing time, reduce curing temperature, reduce vulcanizing agent consumption, the physical and mechanical properties of rubber can also be improved simultaneously.As during promoting agent must with stearic acid with the use of because metal oxide just can make when lipid acid exists promotor activate, promotor just can be made to give full play to promoter action, have very strong activation to vulcanization reaction.Wherein stearic acid plays promoting agent and softening agent effect as organic promoter in rubber material, other powder can also be made evenly to divide in rubber and spread, play again antiseized effect when rubber roll banding.
The effect of anti-aging agent to prevent and to delay rubber aging, increases the service life.The mechanism of action of anti-aging agent can be divided into radical inhibitor and peroxide decomposer two class.Radical inhibitor is because also existing the reactive hydrogen atom easily deviate from its molecule, when rubber is oxidized, the reactive radical species that these hydrogen atoms are tried to be the first on rubber molecular chain is combined, carry out chain termination reaction thus delay oxidising process, and deviating from the anti-aging agent radical after hydrogen and generate stable product with another rubber radical effect.
The effect of softening agent can increase plasticity, snappiness, the elongation at break of rubber, improves the forming process characteristic of rubber, impact property, low temperature flexibility, can reduce the surface hardness of rubber.
The effect of dispersion agent plays internally plasticized effect to sizing material, makes the easier slippage of rubber molecular chain, improves the mobility of sizing material, promotes filler fast and equably blending dispersion in rubber, improve the processing characteristics of sizing material, can also reduce mixing power consumption.
Effect in formula: under any circumstance all should to have volume specific resistance low and vary with temperature less due to insulation layer semi-conductive shielding material, cost is low, extrude good processability, with insulation layer adhesion appropriateness, easily peel off, performance that vulcanization rate is suitable with insulating material.According to the similar dissolve mutually theory of material, comparatively suitable with the rubber adopting molecular polarity large.For reducing material cost, in conjunction with paracril and chlorinated polyethylene rubber bi-material performance characteristics, paracril and chlorinated polyethylene rubber bi-material is adopted to do strippable semi-conductive insulation shielding material as being applicable to.
Paracril elasticity is large, and plasticity is little, even if plasticity is also only about 0.20 after 2-3 section is plasticated, its chemical-resistant stability is good, processing characteristics is good, and along with its relative density of the acrylonitrile content in its structure increases, vulcanization rate is accelerated, tensile strength performance improves, the easy electric field polarization of cyano group in paracril, causes dielectric properties to decline, and paracril has excellent Physical Mechanical and processing characteristics simultaneously, therefore, be a kind of good semi-conductive shielding material.Chlorinated polyethylene rubber has excellent heat oxygen aging resistance, resistance to ozone ageing, acid and alkali-resistance, chemical resistance, and its oil resistance is excellent, suitable with paracril, has high filling properties, good processability.Cable powder can increase the stability of product, increases tensile strength, shearing resistance, flexing intensity etc.Shawinigan black act as static inhibitor, is also used as electroconductive stuffing.High wear-resistant carbon black has preferably energy, wear resistance and elasticity by force to sizing material.Magnesium oxide has excellent alkali resistance and electrical insulating property.Paraffin has good protection against the tide and insulating property, and plasticity-is good.Dioctyl phthalate (DOP) has good over-all properties, good mixing property, and plasticizing efficiency is high, and electric property is high, thermotolerance and weathering resistance good.Stearic acid contributes to " coking " phenomenon prevented in the course of processing, as vulcanization leveller, also can be used as softening agent and tenderizer.Vulcanizing agent can make rubber molecular chain play crosslinking reaction, and make linear molecule form tridimensional network, plasticity-reduces, the material that elastic strength increases.Can reversion be prevented, improve thermotolerance, reduce heat-dissipating, ageing-resistant, improve rubber and cord thread bounding force and cross-linked rubber modulus.Magnesium oxide as inorganic accelerator effect, can improve the coke burning performance of sizing material in this formula, contributes to depositing of rubber unvulcanizate, and contributes to improving the tensile strength of cross-linked rubber, tensile modulus and hardness.A small amount of as adding during inorganic accelerator, obviously can shorten curing time, reduce curing temperature, reduce vulcanizing agent consumption, the physical and mechanical properties of rubber can also be improved simultaneously.As during promoting agent must with stearic acid with the use of because metal oxide just can make when lipid acid exists promotor activate, promotor just can be made to give full play to promoter action, have very strong activation to vulcanization reaction.Wherein stearic acid plays promoting agent and softening agent effect as organic promoter in rubber material, other powder can also be made evenly to divide in rubber and spread, play again antiseized effect when rubber roll banding.The effect of anti-aging agent to prevent and to delay rubber aging, increases the service life.The mechanism of action of anti-aging agent can be divided into radical inhibitor and peroxide decomposer two class.Radical inhibitor is because also existing the reactive hydrogen atom easily deviate from its molecule, when rubber is oxidized, the reactive radical species that these hydrogen atoms are tried to be the first on rubber molecular chain is combined, carry out chain termination reaction thus delay oxidising process, and deviating from the anti-aging agent radical after hydrogen and generate stable product with another rubber radical effect.The effect of softening agent can increase plasticity, snappiness, the elongation at break of rubber, improves the forming process characteristic of rubber, impact property, low temperature flexibility, can reduce the surface hardness of rubber.The effect of dispersion agent plays internally plasticized effect to sizing material, makes the easier slippage of rubber molecular chain, improves the mobility of sizing material, promotes filler fast and equably blending dispersion in rubber, improve the processing characteristics of sizing material, can also reduce mixing power consumption.
Beneficial effect of the present invention is: through the proportioning of Reasonable adjustment paracril and chlorinated polyethylene rubber, determine suitable proportion, it has consistency, flexibility, rippability, shielding properties and good ozone resistance, higher incompressible tension set performance; Also there is high strength, high tear performance, wear resisting property simultaneously.Be carried out in accordance with regulations peeling force test, peeling force, between 4-45N, can be used for the semi-conductive insulation shield layer preparing ethylene propylene rubber insulated cable.
As improvement of the present invention, described rubber disperse agent is polyethylene wax 410P.There is excellent winter hardiness, thermotolerance, chemical resistant properties and wear resistance, increase gloss and the processing characteristics of product.
As improvement of the present invention, described paracril is N220S, has excellent oil-proofness, resistance toheat, superior chemical resistance energy, excellent ozone resistance, higher incompressible tension set performance; Also there are high strength, high tear performance, wear resisting property etc. simultaneously; Due to the easy electric field polarization of the cyano group in paracril, thus dielectric properties decline, and are semi-conducting rubbers.
Embodiment
Embodiment 1: the raw material involved by the effective constituent of filling a prescription with insulation layer semi-conductive shielding material by this ethylene-propylene rubber(EPR) cable and weight, get paracril, 60 parts, chlorinated polyethylene rubber, 40 parts, cable powder, 30 parts, magnesium oxide, 6 parts, Shawinigan black, 50 parts, high wear-resistant carbon black, 15 parts, paraffin, 2.0 parts, anti-aging agent, 3 parts, o-phthalic acid dibutyl ester, 25 parts, rubber disperse agent, 0.6 part, stearic acid, 3 parts, vulcanizing agent, 5 parts.After got paracril, chlorinated polyethylene rubber mixing, enter Banbury mixer to plasticate, plasticate 3-4 minute, add magnesium oxide, anti-aging agent, stearic acid, stearic acid, rubber disperse agent mix, then add cable powder, Shawinigan black, high wear-resistant carbon black mix, add o-phthalic acid dibutyl ester (adding after weighting agent, strengthening agent material feeding) again to mix, finally add vulcanizing agent mixing, enter mill thin-pass bottom sheet and form ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material.
Embodiment 2: the raw material involved by the effective constituent of filling a prescription with insulation layer semi-conductive shielding material by this ethylene-propylene rubber(EPR) cable and weight, get paracril, 65 parts, chlorinated polyethylene rubber, 35 parts, cable powder, 35 parts, magnesium oxide, 7 parts, Shawinigan black, 60 parts, high wear-resistant carbon black, 20 parts, paraffin, 3.0 parts, anti-aging agent, 5 parts, o-phthalic acid dibutyl ester, 20 parts, polyethylene wax 410P, 0.8 part, stearic acid, 3.5 parts, vulcanizing agent, 6 parts.After got paracril, chlorinated polyethylene rubber mixing, enter Banbury mixer to plasticate, plasticate 3-4 minute, add magnesium oxide, anti-aging agent, stearic acid, stearic acid, polyethylene wax 410P mix, then add cable powder, Shawinigan black, high wear-resistant carbon black mix, add o-phthalic acid dibutyl ester (adding after weighting agent, strengthening agent material feeding) again to mix, finally add vulcanizing agent mixing, enter mill thin-pass bottom sheet and form ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material.
Embodiment 3: the raw material involved by the effective constituent of filling a prescription with insulation layer semi-conductive shielding material by this ethylene-propylene rubber(EPR) cable and weight, get paracril N220S, 70 parts, chlorinated polyethylene rubber, 30 parts, cable powder, 45 parts, magnesium oxide, 6.5 parts, Shawinigan black, 55 parts, high wear-resistant carbon black, 25 parts, paraffin, 3.5 parts, anti-aging agent, 7 parts, o-phthalic acid dibutyl ester, 25 parts, polyethylene wax, 0.8 part, stearic acid, 4 parts, vulcanizing agent, 6.5 parts.After got paracril N220S, chlorinated polyethylene rubber mixing, enter Banbury mixer to plasticate, plasticate 3-4 minute, add magnesium oxide, anti-aging agent, stearic acid, stearic acid, polyethylene wax mix, then add cable powder, Shawinigan black, high wear-resistant carbon black mix, add o-phthalic acid dibutyl ester (adding after weighting agent, strengthening agent material feeding) again to mix, finally add vulcanizing agent mixing, enter mill thin-pass bottom sheet and form ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from the technology of the present invention thought, can carry out various formula change and amendment completely.Technical scope of the present invention is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (3)
1. an ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material, it is characterized in that, make raw material involved by effective constituent and weight is: paracril, 60-70 part, chlorinated polyethylene rubber, 30-40 part, cable powder, 30-50 part, Shawinigan black, 50-70 part, high wear-resistant carbon black, 10-30 part, magnesium oxide, 5-10 part, paraffin, 2-4 part, anti-aging agent, 2-8 part, o-phthalic acid dibutyl ester, 20-30 part, rubber disperse agent, 0.5-1 part, stearic acid, 2-5 part, vulcanizing agent, 1-8 part.
2. ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material according to claim 1, is characterized in that: described rubber disperse agent is polyethylene wax 410P.
3. ethylene-propylene rubber(EPR) cable insulation layer semi-conductive shielding material according to claim 1 and 2, is characterized in that: described paracril is N220S.
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Cited By (3)
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| CN105524321A (en) * | 2016-01-23 | 2016-04-27 | 安徽瑞昊缆业有限公司 | Processing formula for semi-conductive cable shielding layer |
| CN106009126A (en) * | 2016-05-23 | 2016-10-12 | 桐城市中汇塑业有限公司 | Conductive antiskid wear-resistant rubber material |
| CN114410022A (en) * | 2022-03-11 | 2022-04-29 | 桂林理工大学 | Semi-conductive rubber and preparation method thereof |
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Application publication date: 20160106 |