CN103540055A - Insulation PVC (Poly Vinyl Chloride) sheath material for extra-high voltage power lines and preparation method thereof - Google Patents

Abstract

The invention discloses an insulation PVC (Poly Vinyl Chloride) sheath material for extra-high voltage power lines and a preparation method thereof. The material comprises the following substances in parts by weight: 60-80 parts of SG-3 PVC resin, 20-30 parts of EVA (Ethylene Vinyl Acetate copolymer) resin, 10-15 parts of polybutylene terephthalate, 0.5-1.5 parts of polyethylene wax, 4-8 parts of epoxidized soybean oil, 5-10 parts of tri-octyl trimellitate, 10-15 parts of nano-montmorillonite, 8-12 parts of manganese ore residue, 5-10 parts of magnesium hydroxide, 16-22 parts of colour black, 1-2 parts of pentad (isooctyl thioglycolate) antimony, 8-12 parts of dioctyl sebacate, 12-18 parts of hydrated zinc borate, 2-3 parts of glycerol monostearate, 5-10 parts of triethyl citrate, 1-2 parts of cobalt naphthenate, 1-2 parts of antioxidant 1010 and 3-6 parts of composite fillers. The sheath material disclosed by the invention has excellent insulating property and the volume resistivity is up to above 7.0*10<12> omega.m; the sheath material has excellent performances such as tensile strength, fire resistance, oil resistance, heat resistance, acid, alkali and corrosion resistance and ageing resistance; the sheath material is durable in use and completely reliable; therefore, the sheath material completely meets the requirements of sheaths for the extra-high voltage power lines and has good market prospect.

Description

Insulating grade PVC sheath material and preparation method thereof for a kind of EHT supply line

Technical field

The present invention relates to a kind of supply lead sheath material and preparation method thereof, be specifically related to insulating grade PVC sheath material and preparation method thereof for a kind of EHT supply line.

Background technology

Supply lead sheath is the indispensable intermediate structure part of supply lead, plays a part protection power source line, guarantees the energising safety of supply lead, makes the media such as copper wire and water, air isolated, avoids occurring leaky.In EHT supply line, sheath material needs the material that insulation resistance is larger to make, and could guarantee safe operation by supply lead, and therefore, sheath material needs higher volume specific resistance to meet the demands.

Summary of the invention

The object of the present invention is to provide insulating grade PVC sheath material and preparation method thereof for a kind of EHT supply line, improve the volume specific resistance of sheath material.

The technical solution used in the present invention is as follows:

A kind of EHT supply line insulating grade PVC sheath material, raw material by following weight part is made: SG-3 type polyvinyl chloride resin 60-80, EVA resin 20-30, polybutylene terephthalate 10-15, polyethylene wax 0.5-1.5, epoxy soybean oil 4-8, trioctyl trimellitate 5-10, nano imvite 10-15, manganese mud 8-12, magnesium hydroxide 5-10, colour black 16-22, five (isooctyl mercaptoacetate) antimony 1-2, dioctyl sebacate 8-12, hydration zinc borate 12-18, glyceryl monostearate 2-3, triethyl citrate 5-10, cobalt naphthenate 1-2, antioxidant 1010 1-2, compounded mix 3-6,

The preparation method of described compounded mix is as follows: a. takes off the raw material of row weight part: agalmatolite 8-12, diopside 5-10, opoka 4-8, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 1-2, calcium lignin sulphonate 2-3, water glass 3-5, electric rock ballast 4-7, Nano diamond 3-6, germanite powder 2-4, sodium stearate 1-2; B, agalmatolite, diopside, opoka are calcined to 4-8h at 540-580 ℃, cooling, pulverize, cross 300-400 mesh sieve, with electric rock ballast, Nano diamond, germanite powder, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, trolamine and water glass, 1000-1500rpm speed lapping 15-20min, dries; Then add appropriate water making beating to make the slurries that concentration is 40-50%, then the hydrochloric acid soln that adds concentration and be 15-20% boils 1-2h, be cooled to after room temperature, with the sodium hydroxide solution that concentration is 15-20%, be adjusted to neutrality, add again the trolamine of 1-2%, the sylvic acid polyoxyethylene ester of the sodium laurylsulfate of the polyacrylic acid of 2-3%, 3-5%, 2-3% and the polyoxyethylene glycol of 3-4%, heating in water bath is to 70-80 ℃, below 2000-3000rpm speed lapping slurry particle diameter to 10 μ m, be then spray dried to powder.

A preparation method for insulating grade PVC sheath material for EHT supply line, comprises the following steps:

(1) EVA resin, polybutylene terephthalate, polyethylene wax, trioctyl trimellitate, nano imvite, magnesium hydroxide, dioctyl sebacate are added in high-speed mixer, at 50-60 ℃, mix 5-8min, discharging, stand-by;

(2) SG-3 type polyvinyl chloride resin is poured in high-speed mixer, be heated to while stirring 100-110 ℃, the compound that adds step (1) to make, mixing 3-4min, add again epoxy soybean oil, manganese mud, colour black, hydration zinc borate, glyceryl monostearate, triethyl citrate, mixing 4-6min, then add all the other raw materials, mixing 1-2min, is cooled to 40 ℃ with bottom discharge;

(3) compound step (2) being made drops into twin screw extruder and carries out extruding pelletization, the working temperature of twin screw extruder is 155-185 ℃, screw speed is 180-240r/min, finally by air-cooled, screening magnetic separation, metering, packing, obtains required sheath material.

Beneficial effect of the present invention:

Sheath material excellent insulation performance of the present invention, volume specific resistance reaches 7.0 * 10 ¹²more than Ω m, and there is good tensile strength, flame retardant resistance, oil-proofness, thermotolerance, acid-alkali-corrosive-resisting, the performance such as ageing-resistant, meet the requirement of EHT supply line sheath completely, durable in use, completely reliable, there are good market outlook.

Embodiment

A line insulating grade PVC sheath material, is made by the raw material of following weight (kg): SG-3 type polyvinyl chloride resin 70, EVA resin 20, polybutylene terephthalate 10, polyethylene wax 1, epoxy soybean oil 6, trioctyl trimellitate 8, nano imvite 12, manganese mud 10, magnesium hydroxide 8, colour black 18, five (isooctyl mercaptoacetate) antimony 1.5, dioctyl sebacate 10, hydration zinc borate 16, glyceryl monostearate 2, triethyl citrate 7, cobalt naphthenate 1.5, antioxidant 1010 1, compounded mix 5;

The preparation method of described compounded mix is as follows: a. takes off the raw material of column weight amount (kg): agalmatolite 12, diopside 8, opoka 6, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 1, calcium lignin sulphonate 2, water glass 4, electric rock ballast 6, Nano diamond 4, germanite powder 3, sodium stearate 1.5; B, agalmatolite, diopside, opoka are calcined to 6h at 560 ℃, cooling, pulverize, cross 300 mesh sieves, with electric rock ballast, Nano diamond, germanite powder, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, trolamine and water glass, 1500rpm speed lapping 18min, dries; Then adding the making beating of appropriate water to make concentration is 40% slurries, then add concentration and be 15% hydrochloric acid soln and boil 2h, be cooled to after room temperature, with the sodium hydroxide solution that concentration is 15%, be adjusted to neutrality, add again 1.5% trolamine, 2% polyacrylic acid, 3% sodium laurylsulfate, 3% sylvic acid polyoxyethylene ester and 4% polyoxyethylene glycol, heating in water bath to 75 ℃, below 2500rpm speed lapping slurry particle diameter to 10 μ m, is then spray dried to powder.

A preparation method for insulating grade PVC sheath material for EHT supply line, comprises the following steps:

(1) EVA resin, polybutylene terephthalate, polyethylene wax, trioctyl trimellitate, nano imvite, magnesium hydroxide, dioctyl sebacate are added in high-speed mixer, at 55 ℃, mix 6min, discharging, stand-by;

(2) SG-3 type polyvinyl chloride resin is poured in high-speed mixer, be heated to while stirring 100-110 ℃, the compound that adds step (1) to make, mixing 3min, add again epoxy soybean oil, manganese mud, colour black, hydration zinc borate, glyceryl monostearate, triethyl citrate, mixing 5min, then add all the other raw materials, mixing 2min, is cooled to 40 ℃ with bottom discharge;

(3) compound step (2) being made drops into twin screw extruder and carries out extruding pelletization, the working temperature of twin screw extruder is 155-185 ℃, screw speed is 220r/min, finally by air-cooled, screening magnetic separation, metering, packing, obtains required sheath material.

The performance test results of the sheath material making is as follows:

Claims (2)

1. an EHT supply line insulating grade PVC sheath material, it is characterized in that, raw material by following weight part is made: SG-3 type polyvinyl chloride resin 60-80, EVA resin 20-30, polybutylene terephthalate 10-15, polyethylene wax 0.5-1.5, epoxy soybean oil 4-8, trioctyl trimellitate 5-10, nano imvite 10-15, manganese mud 8-12, magnesium hydroxide 5-10, colour black 16-22, five (isooctyl mercaptoacetate) antimony 1-2, dioctyl sebacate 8-12, hydration zinc borate 12-18, glyceryl monostearate 2-3, triethyl citrate 5-10, cobalt naphthenate 1-2, antioxidant 1010 1-2, compounded mix 3-6,

The preparation method of described compounded mix is as follows: a. takes off the raw material of row weight part: agalmatolite 8-12, diopside 5-10, opoka 4-8, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 1-2, calcium lignin sulphonate 2-3, water glass 3-5, electric rock ballast 4-7, Nano diamond 3-6, germanite powder 2-4, sodium stearate 1-2; B, agalmatolite, diopside, opoka are calcined to 4-8h at 540-580 ℃, cooling, pulverize, cross 300-400 mesh sieve, with electric rock ballast, Nano diamond, germanite powder, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, trolamine and water glass, 1000-1500rpm speed lapping 15-20min, dries; Then add appropriate water making beating to make the slurries that concentration is 40-50%, then the hydrochloric acid soln that adds concentration and be 15-20% boils 1-2h, be cooled to after room temperature, with the sodium hydroxide solution that concentration is 15-20%, be adjusted to neutrality, add again the trolamine of 1-2%, the sylvic acid polyoxyethylene ester of the sodium laurylsulfate of the polyacrylic acid of 2-3%, 3-5%, 2-3% and the polyoxyethylene glycol of 3-4%, heating in water bath is to 70-80 ℃, below 2000-3000rpm speed lapping slurry particle diameter to 10 μ m, be then spray dried to powder.

2. the preparation method of insulating grade PVC sheath material for EHT supply line as claimed in claim 1, is characterized in that comprising the following steps:

(1) EVA resin, polybutylene terephthalate, polyethylene wax, trioctyl trimellitate, nano imvite, magnesium hydroxide, dioctyl sebacate are added in high-speed mixer, at 50-60 ℃, mix 5-8min, discharging, stand-by;

(2) SG-3 type polyvinyl chloride resin is poured in high-speed mixer, be heated to while stirring 100-110 ℃, the compound that adds step (1) to make, mixing 3-4min, add again epoxy soybean oil, manganese mud, colour black, hydration zinc borate, glyceryl monostearate, triethyl citrate, mixing 4-6min, then add all the other raw materials, mixing 1-2min, is cooled to 40 ℃ with bottom discharge;

(3) compound step (2) being made drops into twin screw extruder and carries out extruding pelletization, the working temperature of twin screw extruder is 155-185 ℃, screw speed is 180-240r/min, finally by air-cooled, screening magnetic separation, metering, packing, obtains required sheath material.