CN112210143A - Flame-retardant PE (polyethylene) insulating sheath material for high-voltage and extra-high-voltage cable - Google Patents
Flame-retardant PE (polyethylene) insulating sheath material for high-voltage and extra-high-voltage cable Download PDFInfo
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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
- C08L23/06—Polyethene
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- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
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- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K2003/2272—Ferric oxide (Fe2O3)
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention discloses a cable flame-retardant PE insulating sheath material for high-voltage and extra-high voltage, which has the technical scheme that: comprises the following components by weight: 30-45 parts of polyethylene, 5-10 parts of compatilizer, 30-50 parts of flame retardant, 1-5 parts of heat stabilizer, 1-2 parts of smoke suppressor, 0.5-1 part of antioxidant, 1-2 parts of lubricant, 1-2 parts of ultraviolet resistant master batch and 1-3 parts of other auxiliary agents; the effects of improving volume resistivity, improving efficiency, reducing dielectric loss, resisting flame, eliminating smoke, being safe and environment-friendly are achieved.
Description
Technical Field
The invention belongs to the field of cable materials, and particularly relates to a flame-retardant PE insulating sheath material for a cable for high-voltage and extra-high voltage.
Background
With the improvement of the power cable to the quality of raw materials in China, the quality requirement of manufacturers for producing the raw materials is further improved, and Polyethylene (PE) is thermoplastic resin prepared by polymerizing ethylene. In industry, copolymers of ethylene with small amounts of alpha-olefins are also included. The polyethylene has no odor and no toxicity, feels like wax, has excellent low-temperature resistance (the lowest use temperature can reach-100-70 ℃), has good chemical stability, and can resist the corrosion of most of acid and alkali (cannot resist acid with oxidation property). Is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation. I will promote the performance index of the cable flame-retardant PE insulating sheath material for high-voltage extra-high voltage.
The modified PE sheath or the insulating material for the cold-resistant cable can be referred to Chinese patent with publication number CN101320602B, belongs to the technical field of cable materials, and is prepared from low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, antistatic agent HDC-103, tetrapropylpentaerythrite 1010, calcium AD, polyethylene wax, barium stearate, titanate GT-114, magnesium hydroxide and zinc stearate.
The above-mentioned patent has the environmental stress crack resistance ability of improving polyethylene, and this kind of modified PE sheath or insulating material who produces has advantages such as cold-resistant, difficult fracture, water nondegradation, flexibility are good, but it also has the defect, if: the insulating material has lower specific resistance per unit volume at 20 ℃, so that the insulating material has lower efficiency and higher dielectric loss as an electric insulating part.
Disclosure of Invention
The invention aims to provide a flame-retardant PE insulating sheath material for a cable for high-voltage and extra-high voltage so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the flame-retardant PE insulating sheath material for the cable for the high-voltage and extra-high voltage comprises the following components in parts by weight: 30-45 parts of polyethylene, 5-10 parts of compatilizer, 30-50 parts of flame retardant, 1-5 parts of heat stabilizer, 1-2 parts of smoke suppressor, 0.5-1 part of antioxidant, 1-2 parts of lubricant, 1-2 parts of anti-ultraviolet master batch and 1-3 parts of other auxiliary agents.
Preferably, the heat stabilizer is one or more of tribasic lead salt, dibasic lead salt, zinc stearate, cadmium stearate, calcium stearate, dibutyltin dilaurate, dibutyltin dimaleate and hydrotalcite calcium zinc.
Preferably, the flame retardant is one or more of tetraphenyl resorcinol diphosphate, decabromodiphenyl ether, tetraphenyl (bisphenol-A) diphosphate, ferric oxide, ammonium polyphosphate, zinc oxide, zinc borate and zinc sulfate.
Preferably, the compatilizer is one or more of polypropylene grafted maleic anhydride, styrene-ethylene-butadiene-styrene copolymer grafted maleic anhydride, styrene-maleic anhydride random copolymer, ethylene-vinyl acetate grafted maleic anhydride and ethylene-octene copolymer elastomer grafted maleic anhydride.
Preferably, the preparation method of the smoke suppressor comprises the following steps:
the method comprises the following steps: putting magnesium oxide, aluminum hypophosphite, aluminum hydroxide, microporous silicon dioxide powder, zinc borate, magnesium aluminum hydrotalcite and a smoke suppression catalyst into a stirrer for fully stirring;
step two: placing the mixture obtained in the first step into a stirrer, heating to 90-120 ℃, then adding a coating agent, adjusting the rotation speed to 1800-3500r/min, and continuing stirring for 20-40 min;
step three: and after the second step is finished, standing and cooling to normal temperature to obtain the smoke suppressor.
Preferably, the mass ratio of the magnesium oxide, the aluminum hypophosphite, the aluminum hydroxide, the microporous silica powder, the zinc borate, the magnesium-aluminum hydrotalcite and the smoke suppression catalyst is 1:2:1:1:2:1: 3.
Preferably, the other auxiliary agents are prepared by fully mixing a light stabilizer and an anti-aging agent according to the mass ratio of 1: 2.
Preferably, the preparation method of the cable flame-retardant PE insulating sheath material for the high-voltage and extra-high voltage comprises the following steps:
s1, mixing: putting polyethylene and ultraviolet resistant master batch into a stirrer, heating to 80-105 ℃, adjusting the rotating speed to 500r/min, and continuously stirring for 20-35min to obtain a mixture A;
s2, mixing: sequentially putting the mixture A, the compatilizer, the flame retardant, the heat stabilizer, the smoke suppressor, the antioxidant, the lubricant and other auxiliaries into a PVC mixing roll, adjusting the temperature to 140 ℃ and 180 ℃, and continuously mixing for 50-90min to obtain a mixture B;
s3, granulation: and injecting the mixture B into a double-screw extruder, adjusting the temperature to 190-220 ℃, and obtaining the extruded particles, namely the flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable.
Compared with the prior art, the invention has the beneficial effects that:
(1) the flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable is prepared by carrying out series reactions on polyethylene, a compatilizer, a heat stabilizer, an antioxidant, a lubricant, an ultraviolet-resistant master batch and other auxiliary agents which are different in components, and the raw materials of the components are fully matched and optimized, so that the effect of increasing the specific volume resistivity of the material can be achieved, the specific volume resistivity of the material can be increased from 1.0A 12 to 3.0A 14 at 20 ℃, and the effects of increasing the specific volume resistivity, improving the efficiency and reducing the dielectric loss are achieved.
(2) The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable is used by matching a flame retardant with a smoke suppressor, and the smoke suppressor can reduce the smoke generation amount of the material during combustion by 90 percent and can improve the flame retardance and the oxygen index to a certain extent; the flame retardant can enable the material to have excellent flame retardant capability, and simultaneously has the function of diluting the oxygen concentration in a combustion area, so that the combustion is prevented from continuing to achieve the flame retardant function; can achieve the effects of flame retardance, smoke abatement, safety and environmental protection.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The flame-retardant PE insulating sheath material for the cable for the high-voltage and extra-high voltage comprises the following components in parts by weight: 40 parts of polyethylene, 8 parts of compatilizer, 40 parts of flame retardant, 2 parts of heat stabilizer, 2 parts of smoke suppressor, 0.5 part of antioxidant, 2 parts of lubricant, 2 parts of anti-ultraviolet master batch and 3 parts of other auxiliary agents.
In this embodiment, the heat stabilizer is preferably one or more of tribasic lead salt, dibasic lead salt, zinc stearate, cadmium stearate, calcium stearate, dibutyltin dilaurate, dibutyltin dimaleate, and calcium zinc hydrotalcite.
Can prevent the thermal aging of the material and eliminate all substances which have catalytic action on the thermal degradation reaction of non-chain fracture.
In this embodiment, the flame retardant is preferably one or more of tetraphenylresorcinol diphosphate, decabromodiphenyl ether, tetraphenyl (bisphenol-a) diphosphate, ferric oxide, ammonium polyphosphate, zinc oxide, zinc borate, and zinc sulfate.
The flame retardant can endow inflammable polymer with flame resistance, decomposes non-inflammable gas when being heated, dilutes the concentration of the combustible gas decomposed from combustible substances to be below the lower limit of combustion, does not release smoke, does not generate harmful and controversial gas, and has low cost.
In this embodiment, preferably, the compatibilizer is one or more of polypropylene grafted maleic anhydride, styrene-ethylene-butadiene-styrene copolymer grafted maleic anhydride, styrene-maleic anhydride random copolymer, ethylene-vinyl acetate grafted maleic anhydride, and ethylene-octene copolymer elastomer grafted maleic anhydride.
The compatilizer can increase the compatibility between two polymers, increase the bonding force between the two polymers, form a stable structure, make the dispersed phase and the continuous phase uniform, and have the effect of groups which can be respectively physically or chemically combined with the two polymers.
In this embodiment, preferably, the preparation method of the smoke suppressor is:
the method comprises the following steps: putting magnesium oxide, aluminum hypophosphite, aluminum hydroxide, microporous silicon dioxide powder, zinc borate, magnesium aluminum hydrotalcite and a smoke suppression catalyst into a stirrer for fully stirring;
step two: putting the mixture obtained in the first step into a stirrer, heating to 90 ℃, then adding a coating agent, adjusting the rotating speed to 2100r/min, and continuing stirring for 30 min;
step three: and after the second step is finished, standing and cooling to normal temperature to obtain the smoke suppressor.
In order to describe the preparation process of the smoke suppressor in more detail.
In this embodiment, the mass ratio of the magnesium oxide, the aluminum hypophosphite, the aluminum hydroxide, the microporous silica powder, the zinc borate, the magnesium aluminum hydrotalcite and the smoke suppression catalyst is preferably 1:1:1:1:2:1: 1.
In this embodiment, the other additives are preferably prepared by thoroughly mixing a light stabilizer and an aging inhibitor in a mass ratio of 1: 2.
In this embodiment, preferably, the preparation method of the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is as follows:
s1, mixing: putting polyethylene and ultraviolet resistant master batch into a stirrer, heating to 80 ℃, adjusting the rotating speed to 300r/min, and continuously stirring for 20min to obtain a mixture A;
s2, mixing: sequentially putting the mixture A, the compatilizer, the flame retardant, the heat stabilizer, the smoke suppressor, the antioxidant, the lubricant and other auxiliaries into a PVC mixing roll, adjusting the temperature to 160 ℃, and continuously mixing for 85min to obtain a mixture B;
s3, granulation: and injecting the mixture B into a double-screw extruder, adjusting the temperature to 200 ℃, and extruding granules to obtain the high-voltage extra-high voltage cable flame-retardant PE insulating sheath material.
The flame-retardant PE insulating sheath material for the high-voltage and extra-high voltage cable is prepared by carrying out series reactions on polyethylene, a compatilizer, a heat stabilizer, an antioxidant, a lubricant, an ultraviolet-resistant master batch and other auxiliaries which are different in components, wherein the raw materials of the components are fully matched and optimized, so that the effect of improving the specific volume resistance of the material can be achieved, the specific volume resistance of the material can be improved from 1.0A 10A 12 to 3.0A 10A 14 at the temperature of 20 ℃, and the effects of improving the specific volume resistance, improving the efficiency and reducing the dielectric loss are achieved; the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is used by matching the flame retardant with the smoke suppressor, so that the smoke suppressor can reduce the smoke generation amount of the material during combustion by 90 percent and can improve the flame retardance and the oxygen index to a certain extent; the flame retardant can enable the material to have excellent flame retardant capability, and simultaneously has the function of diluting the oxygen concentration in a combustion area, so that the combustion is prevented from continuing to achieve the flame retardant function; can achieve the effects of flame retardance, smoke abatement, safety and environmental protection.
Example 2
The flame-retardant PE insulating sheath material for the cable for the high-voltage and extra-high voltage comprises the following components in parts by weight: 30 parts of polyethylene, 5 parts of compatilizer, 30 parts of flame retardant, 1 part of heat stabilizer, 1 part of smoke suppressor, 0.5 part of antioxidant, 1 part of lubricant, 1 part of anti-ultraviolet master batch and 1 part of other auxiliary agents.
In this embodiment, the heat stabilizer is preferably one or more of tribasic lead salt, dibasic lead salt, zinc stearate, cadmium stearate, calcium stearate, dibutyltin dilaurate, dibutyltin dimaleate, and calcium zinc hydrotalcite.
Can prevent the thermal aging of the material and eliminate all substances which have catalytic action on the thermal degradation reaction of non-chain fracture.
In this embodiment, the flame retardant is preferably one or more of tetraphenylresorcinol diphosphate, decabromodiphenyl ether, tetraphenyl (bisphenol-a) diphosphate, ferric oxide, ammonium polyphosphate, zinc oxide, zinc borate, and zinc sulfate.
The flame retardant can endow inflammable polymer with flame resistance, decomposes non-inflammable gas when being heated, dilutes the concentration of the combustible gas decomposed from combustible substances to be below the lower limit of combustion, does not release smoke, does not generate harmful and controversial gas, and has low cost.
In this embodiment, preferably, the compatibilizer is one or more of polypropylene grafted maleic anhydride, styrene-ethylene-butadiene-styrene copolymer grafted maleic anhydride, styrene-maleic anhydride random copolymer, ethylene-vinyl acetate grafted maleic anhydride, and ethylene-octene copolymer elastomer grafted maleic anhydride.
The compatilizer can increase the compatibility between two polymers, increase the bonding force between the two polymers, form a stable structure, make the dispersed phase and the continuous phase uniform, and have the effect of groups which can be respectively physically or chemically combined with the two polymers.
In this embodiment, preferably, the preparation method of the smoke suppressor is:
the method comprises the following steps: putting magnesium oxide, aluminum hypophosphite, aluminum hydroxide, microporous silicon dioxide powder, zinc borate, magnesium aluminum hydrotalcite and a smoke suppression catalyst into a stirrer for fully stirring;
step two: putting the mixture obtained in the first step into a stirrer, heating to 90 ℃, then adding a coating agent, adjusting the rotating speed to 3500r/min, and continuing stirring for 40 min;
step three: and after the second step is finished, standing and cooling to normal temperature to obtain the smoke suppressor.
In order to describe the preparation process of the smoke suppressor in more detail.
In this embodiment, the mass ratio of the magnesium oxide, the aluminum hypophosphite, the aluminum hydroxide, the microporous silica powder, the zinc borate, the magnesium aluminum hydrotalcite and the smoke suppression catalyst is preferably 1:2:1:1:2:1: 3.
In this embodiment, the other additives are preferably prepared by thoroughly mixing a light stabilizer and an aging inhibitor in a mass ratio of 1: 2.
In this embodiment, preferably, the preparation method of the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is as follows:
s1, mixing: putting polyethylene and ultraviolet resistant master batch into a stirrer, heating to 80 ℃, adjusting the rotating speed to 500r/min, and continuously stirring for 35min to obtain a mixture A;
s2, mixing: sequentially putting the mixture A, the compatilizer, the flame retardant, the heat stabilizer, the smoke suppressor, the antioxidant, the lubricant and other auxiliaries into a PVC mixing roll, adjusting the temperature to 180 ℃, and continuously mixing for 90min to obtain a mixture B;
s3, granulation: and injecting the mixture B into a double-screw extruder, adjusting the temperature to 190 ℃, and extruding granules to obtain the high-voltage extra-high voltage cable flame-retardant PE insulating sheath material.
The flame-retardant PE insulating sheath material for the high-voltage and extra-high voltage cable is prepared by carrying out series reactions on polyethylene, a compatilizer, a heat stabilizer, an antioxidant, a lubricant, an ultraviolet-resistant master batch and other auxiliaries which are different in components, wherein the raw materials of the components are fully matched and optimized, so that the effect of improving the specific volume resistance of the material can be achieved, the specific volume resistance of the material can be improved from 1.0A 10A 12 to 3.0A 10A 14 at the temperature of 20 ℃, and the effects of improving the specific volume resistance, improving the efficiency and reducing the dielectric loss are achieved; the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is used by matching the flame retardant with the smoke suppressor, so that the smoke suppressor can reduce the smoke generation amount of the material during combustion by 90 percent and can improve the flame retardance and the oxygen index to a certain extent; the flame retardant can enable the material to have excellent flame retardant capability, and simultaneously has the function of diluting the oxygen concentration in a combustion area, so that the combustion is prevented from continuing to achieve the flame retardant function; can achieve the effects of flame retardance, smoke abatement, safety and environmental protection.
Example 3
The flame-retardant PE insulating sheath material for the cable for the high-voltage and extra-high voltage comprises the following components in parts by weight: 45 parts of polyethylene, 10 parts of compatilizer, 50 parts of flame retardant, 5 parts of heat stabilizer, 2 parts of smoke suppressor, 1 part of antioxidant, 2 parts of lubricant, 2 parts of anti-ultraviolet master batch and 3 parts of other auxiliary agents.
In this embodiment, the heat stabilizer is preferably one or more of tribasic lead salt, dibasic lead salt, zinc stearate, cadmium stearate, calcium stearate, dibutyltin dilaurate, dibutyltin dimaleate, and calcium zinc hydrotalcite.
Can prevent the thermal aging of the material and eliminate all substances which have catalytic action on the thermal degradation reaction of non-chain fracture.
In this embodiment, the flame retardant is preferably one or more of tetraphenylresorcinol diphosphate, decabromodiphenyl ether, tetraphenyl (bisphenol-a) diphosphate, ferric oxide, ammonium polyphosphate, zinc oxide, zinc borate, and zinc sulfate.
The flame retardant can endow inflammable polymer with flame resistance, decomposes non-inflammable gas when being heated, dilutes the concentration of the combustible gas decomposed from combustible substances to be below the lower limit of combustion, does not release smoke, does not generate harmful and controversial gas, and has low cost.
In this embodiment, preferably, the compatibilizer is one or more of polypropylene grafted maleic anhydride, styrene-ethylene-butadiene-styrene copolymer grafted maleic anhydride, styrene-maleic anhydride random copolymer, ethylene-vinyl acetate grafted maleic anhydride, and ethylene-octene copolymer elastomer grafted maleic anhydride.
The compatilizer can increase the compatibility between two polymers, increase the bonding force between the two polymers, form a stable structure, make the dispersed phase and the continuous phase uniform, and have the effect of groups which can be respectively physically or chemically combined with the two polymers.
In this embodiment, preferably, the preparation method of the smoke suppressor is:
the method comprises the following steps: putting magnesium oxide, aluminum hypophosphite, aluminum hydroxide, microporous silicon dioxide powder, zinc borate, magnesium aluminum hydrotalcite and a smoke suppression catalyst into a stirrer for fully stirring;
step two: putting the mixture obtained in the first step into a stirrer, heating to 120 ℃, then adding a coating agent, adjusting the rotating speed to 1800r/min, and continuing stirring for 20 min;
step three: and after the second step is finished, standing and cooling to normal temperature to obtain the smoke suppressor.
In order to describe the preparation process of the smoke suppressor in more detail.
In this embodiment, the mass ratio of the magnesium oxide, the aluminum hypophosphite, the aluminum hydroxide, the microporous silica powder, the zinc borate, the magnesium aluminum hydrotalcite and the smoke suppression catalyst is preferably 1:2:1:1:2:1: 3.
In this embodiment, the other additives are preferably prepared by thoroughly mixing a light stabilizer and an aging inhibitor in a mass ratio of 1: 2.
In this embodiment, preferably, the preparation method of the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is as follows:
s1, mixing: putting polyethylene and ultraviolet-resistant master batch into a stirrer, heating to 105 ℃, adjusting the rotating speed to 300r/min, and continuously stirring for 35min to obtain a mixture A;
s2, mixing: sequentially putting the mixture A, the compatilizer, the flame retardant, the heat stabilizer, the smoke suppressor, the antioxidant, the lubricant and other auxiliaries into a PVC mixing roll, adjusting the temperature to 180 ℃, and continuously mixing for 90min to obtain a mixture B;
s3, granulation: and injecting the mixture B into a double-screw extruder, adjusting the temperature to 220 ℃, and extruding granules to obtain the high-voltage extra-high voltage cable flame-retardant PE insulating sheath material.
The flame-retardant PE insulating sheath material for the high-voltage and extra-high voltage cable is prepared by carrying out series reactions on polyethylene, a compatilizer, a heat stabilizer, an antioxidant, a lubricant, an ultraviolet-resistant master batch and other auxiliaries which are different in components, wherein the raw materials of the components are fully matched and optimized, so that the effect of improving the specific volume resistance of the material can be achieved, the specific volume resistance of the material can be improved from 1.0A 10A 12 to 3.0A 10A 14 at the temperature of 20 ℃, and the effects of improving the specific volume resistance, improving the efficiency and reducing the dielectric loss are achieved; the flame-retardant PE insulating sheath material for the high-voltage and extra-high-voltage cable is used by matching the flame retardant with the smoke suppressor, so that the smoke suppressor can reduce the smoke generation amount of the material during combustion by 90 percent and can improve the flame retardance and the oxygen index to a certain extent; the flame retardant can enable the material to have excellent flame retardant capability, and simultaneously has the function of diluting the oxygen concentration in a combustion area, so that the combustion is prevented from continuing to achieve the flame retardant function; can achieve the effects of flame retardance, smoke abatement, safety and environmental protection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The flame-retardant PE insulating sheath material for the cable for the high-voltage and extra-high voltage is characterized by comprising the following components in parts by weight: 30-45 parts of polyethylene, 5-10 parts of compatilizer, 30-50 parts of flame retardant, 1-5 parts of heat stabilizer, 1-2 parts of smoke suppressor, 0.5-1 part of antioxidant, 1-2 parts of lubricant, 1-2 parts of anti-ultraviolet master batch and 1-3 parts of other auxiliary agents.
2. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the heat stabilizer is one or more of tribasic lead salt, dibasic lead salt, zinc stearate, cadmium stearate, calcium stearate, dibutyltin dilaurate, dibutyltin dimaleate and hydrotalcite calcium zinc.
3. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the flame retardant is one or more of tetraphenyl resorcinol diphosphate, decabromodiphenyl ether, tetraphenyl (bisphenol-A) diphosphate, ferric oxide, ammonium polyphosphate, zinc oxide, zinc borate and zinc sulfate.
4. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the compatilizer is one or more of polypropylene grafted maleic anhydride, styrene-ethylene-butadiene-styrene copolymer grafted maleic anhydride, styrene-maleic anhydride random copolymer, ethylene-vinyl acetate grafted maleic anhydride and ethylene-octene copolymer elastomer grafted maleic anhydride.
5. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the preparation method of the smoke suppressor comprises the following steps:
the method comprises the following steps: putting magnesium oxide, aluminum hypophosphite, aluminum hydroxide, microporous silicon dioxide powder, zinc borate, magnesium aluminum hydrotalcite and a smoke suppression catalyst into a stirrer for fully stirring;
step two: placing the mixture obtained in the first step into a stirrer, heating to 90-120 ℃, then adding a coating agent, adjusting the rotation speed to 1800-3500r/min, and continuing stirring for 20-40 min;
step three: and after the second step is finished, standing and cooling to normal temperature to obtain the smoke suppressor.
6. The cable flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 5, wherein the flame-retardant PE insulating sheath material comprises the following components in parts by weight: the mass ratio of the magnesium oxide to the aluminum hypophosphite to the aluminum hydroxide to the microporous silica powder to the zinc borate to the magnesium-aluminum hydrotalcite to the smoke suppression catalyst is 1:2:1:1:2:1: 3.
7. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the other auxiliary agents are prepared by fully mixing a light stabilizer and an anti-aging agent according to the mass ratio of 1: 2.
8. The flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable according to claim 1, which is characterized in that: the preparation method of the flame-retardant PE insulating sheath material for the high-voltage and extra-high voltage cable comprises the following steps:
s1, mixing: putting polyethylene and ultraviolet resistant master batch into a stirrer, heating to 80-105 ℃, adjusting the rotating speed to 500r/min, and continuously stirring for 20-35min to obtain a mixture A;
s2, mixing: sequentially putting the mixture A, the compatilizer, the flame retardant, the heat stabilizer, the smoke suppressor, the antioxidant, the lubricant and other auxiliaries into a PVC mixing roll, adjusting the temperature to 140 ℃ and 180 ℃, and continuously mixing for 50-90min to obtain a mixture B;
s3, granulation: and injecting the mixture B into a double-screw extruder, adjusting the temperature to 190-220 ℃, and obtaining the extruded particles, namely the flame-retardant PE insulating sheath material for the high-voltage extra-high voltage cable.
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| CN202010901816.7A CN112210143A (en) | 2020-09-01 | 2020-09-01 | Flame-retardant PE (polyethylene) insulating sheath material for high-voltage and extra-high-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010901816.7A CN112210143A (en) | 2020-09-01 | 2020-09-01 | Flame-retardant PE (polyethylene) insulating sheath material for high-voltage and extra-high-voltage cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101481475A (en) * | 2008-07-17 | 2009-07-15 | 黑龙江沃尔德电缆有限公司 | Ultraviolet crosslinked expansion type flame-retardant polyolefin cable insulation sheath material and preparation thereof |
| CN103804798A (en) * | 2012-11-05 | 2014-05-21 | 上海凯波特种电缆料厂有限公司 | Halogen-free flame retardant polyethylene sheath material applied to super high voltage cable and preparation method and application thereof |
| CN108059761A (en) * | 2017-12-11 | 2018-05-22 | 上海至正道化高分子材料股份有限公司 | A kind of 125 DEG C of cross-linking radiation photovoltaic cable flame-retardant sheath materials and preparation method thereof |
| CN108410019A (en) * | 2018-03-30 | 2018-08-17 | 潍坊万丰新材料科技有限公司 | Compound fire-proof smoke suppressor |
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2020
- 2020-09-01 CN CN202010901816.7A patent/CN112210143A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481475A (en) * | 2008-07-17 | 2009-07-15 | 黑龙江沃尔德电缆有限公司 | Ultraviolet crosslinked expansion type flame-retardant polyolefin cable insulation sheath material and preparation thereof |
| CN103804798A (en) * | 2012-11-05 | 2014-05-21 | 上海凯波特种电缆料厂有限公司 | Halogen-free flame retardant polyethylene sheath material applied to super high voltage cable and preparation method and application thereof |
| CN108059761A (en) * | 2017-12-11 | 2018-05-22 | 上海至正道化高分子材料股份有限公司 | A kind of 125 DEG C of cross-linking radiation photovoltaic cable flame-retardant sheath materials and preparation method thereof |
| CN108410019A (en) * | 2018-03-30 | 2018-08-17 | 潍坊万丰新材料科技有限公司 | Compound fire-proof smoke suppressor |
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