CN116622174A - Corrosion-resistant cable insulation material and preparation method thereof - Google Patents

Corrosion-resistant cable insulation material and preparation method thereof Download PDF

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CN116622174A
CN116622174A CN202310906478.XA CN202310906478A CN116622174A CN 116622174 A CN116622174 A CN 116622174A CN 202310906478 A CN202310906478 A CN 202310906478A CN 116622174 A CN116622174 A CN 116622174A
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cable insulation
corrosion
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南如清
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Kexin Cable Co ltd
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Kexin Cable Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • 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
    • H—ELECTRICITY
    • 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
    • H01B3/441—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 alkenes
    • H—ELECTRICITY
    • 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
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
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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
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    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
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    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
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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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/321—Phosphates
    • C08K2003/327—Aluminium phosphate
    • 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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    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Abstract

The application provides a corrosion-resistant cable insulating material which comprises the following components in parts by weight: 60-80 parts of polyvinyl chloride, 60-80 parts of polyethylene, 15-20 parts of modified fluoroplastic, 4-7 parts of antioxidant, 4-7 parts of flame retardant, 5-8 parts of wear-resistant agent and 2-3 parts of lubricant. According to the application, the modified fluoroplastic is added into the insulating material taking polyvinyl chloride and polyethylene as main base materials, so that the corrosion resistance of the insulating material can be greatly improved, and the addition amount of the modified fluoroplastic is greatly reduced compared with that of the conventional fluoroplastic, so that the production cost is saved, and the modified fluoroplastic has higher economic value.

Description

Corrosion-resistant cable insulation material and preparation method thereof
Technical Field
The application belongs to the technical field of cable materials, and particularly relates to a corrosion-resistant cable insulating material and a preparation method thereof.
Background
Insulating materials of wires and cables are important structures for ensuring normal operation of conductors. Commonly used insulation materials for wires and cables are polyvinyl chloride (PVC), cross-linked polyethylene (XLPE), ethylene Propylene Rubber (EPR), rubber, fluoroplastic, etc. The PVC polyvinyl chloride insulating material is a mixture of adding a stabilizer, a plasticizer, a flame retardant, a lubricant and other auxiliary agents into PVC powder. The formula of the cable is correspondingly adjusted according to different applications and different characteristic requirements of the cable. PVC manufacturing and processing techniques are now very mature over several decades of production and use. PVC insulating material has very extensive application in wire and cable field, but PVC also has some self shortcoming, has restricted its use: 1) Because of the large amount of chlorine, a large amount of dense smoke is emitted during combustion, which can cause suffocation to people, influence visibility, generate some carcinogens and HCl gas and cause serious harm to the environment. 2) The common PVC insulation is poor in acid and alkali resistance, hot oil resistance and organic solvent resistance, and according to the similar compatible chemical principle, the PVC wire is extremely easy to break and crack in the specific environment.
Chinese patent CN114106486a discloses a PVC flame retardant plastic particle for electric wire and cable and its preparation method, comprising the following components in parts by weight: 40-80 parts of polyvinyl chloride, 40-60 parts of polyethylene, 20-50 parts of crosslinked polyethylene, 30-50 parts of polypropylene, 20-60 parts of fluoroplastic, 5-10 parts of plasticizer, 4-15 parts of ultraviolet absorber, 5-10 parts of antioxidant and 7-12 parts of flame retardant. On the basis of the raw materials, a plasticizer, an ultraviolet absorber, an antioxidant and a flame retardant are added, and the plastic can be reinforced by the plasticizerThe toughness of the particles can avoid the phenomenon that plastic particles are easy to break, the ultraviolet light in the light can be absorbed through an ultraviolet absorber and an antioxidant, the plastic particles are prevented from being aged due to the actions of light, heat and oxygen, the service life is prolonged, and the ultraviolet light is prevented from being aged due to the actions of DOPO derivatives and diamine NH 2 R 2 NH 2 The flame retardant prepared by high-temperature high-pressure reaction can effectively improve the flame retardant property of plastic particles. However, although a large amount of fluoroplastic is added into the plastic particles prepared by the method, so that the production cost is greatly improved, the corrosion resistance of the product is not concerned.
Compared with common polyethylene and polyvinyl chloride cables, the fluoroplastic cable has the following outstanding characteristics: 1) The high-temperature resistant fluoroplastic has extraordinary thermal stability, so that the fluoroplastic cable can adapt to a high-temperature environment of 50-250 ℃. Under the condition of the conductors with the same section, the fluoroplastic cable can transmit larger allowable current, so that the application range of the insulated wire is greatly improved. 2) The flame retardant property is good, the oxygen index of the fluoroplastic is high, the flame diffusion range is small during combustion, and the generated smoke amount is small. 3) The electrical properties are excellent, and the dielectric constant of the fluoroplastic is lower than that of polyethylene. 4) The mechanical and chemical properties are perfect, the chemical bond energy of the fluoroplastic is high, the fluoroplastic has high stability, is hardly influenced by temperature change, and has excellent weather aging resistance and mechanical strength; but also is not affected by various acids, bases and organic solvents.
However, fluoroplastics have some drawbacks that limit their use: 1) The price of raw materials is high, domestic production is mainly dependent on import at present, domestic fluoroplastic develops rapidly in recent years, but the production variety is single, and the material has a certain gap in thermal stability and other comprehensive properties compared with the imported material. 2) Compared with other insulating materials, the production process has the problems of difficult production process, low production efficiency, large consumption and the like, so that the production cost is higher.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a corrosion-resistant cable insulating material, which comprises the following components in parts by weight: 60-80 parts of polyvinyl chloride, 60-80 parts of polyethylene, 15-20 parts of modified fluoroplastic, 4-7 parts of antioxidant, 4-7 parts of flame retardant, 5-8 parts of wear-resistant agent and 2-3 parts of lubricant.
Further, the cable insulation material comprises the following components in parts by weight: 70 parts of polyvinyl chloride, 70 parts of polyethylene, 18 parts of modified fluoroplastic, 5 parts of antioxidant, 5 parts of flame retardant, 6 parts of wear-resistant agent and 2 parts of lubricant.
Further, the modified fluoroplastic is prepared by the following method: polyvinylidene fluoride (PVDF) is adopted as a base material, nano aluminum oxide, isocyanate, aluminum phosphate, calcium carbonate and black ferric oxide are added into the base material, the temperature is gradually increased to 130-150 ℃ under stirring, then an oiling agent is added into the base material, the mixture is uniformly mixed, extruded and molded, and the mixture is naturally cooled, so that the modified fluoroplastic is obtained.
Further, compared with the weight of polyvinylidene fluoride, the nano aluminum oxide additive amount is 5-8%, the isocyanate (preferably toluene diisocyanate, TDI) additive amount is 5-10%, the aluminum phosphate additive amount is 2-4%, the calcium carbonate additive amount is 5-8%, the black iron oxide additive amount is 0.2-0.5%, and the oil additive amount is 10-13%.
Further, the amount of nano alumina added was 6%, the amount of isocyanate (preferably toluene diisocyanate, TDI) added was 5%, the amount of aluminum phosphate added was 3%, the amount of calcium carbonate added was 5%, the amount of black iron oxide added was 0.3%, and the amount of oil added was 12% as compared to the weight of polyvinylidene fluoride.
Further, the extrusion temperature is controlled below 120 ℃, and the extrusion speed is 3-6m/min.
In another aspect, the present application provides a method of preparing the corrosion-resistant cable insulation material, the method comprising:
preheating stirring equipment to 120-140 ℃, adding polyvinyl chloride, polyethylene, modified fluoroplastic and an organic solvent, and keeping the temperature and stirring for 3-6 hours;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, and an antioxidant, a flame retardant, an antiwear agent and a lubricant are added into the stirring equipment to be continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Further, in the third step, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min.
The corrosion-resistant cable insulating material prepared by the application has the following advantages:
the modified fluoroplastic is added into the insulating material taking polyvinyl chloride and polyethylene as main base materials, so that the corrosion resistance of the insulating material can be greatly improved, and the addition amount of the modified fluoroplastic is greatly reduced compared with that of the conventional fluoroplastic, so that the production cost is saved, and the modified fluoroplastic has higher economic value. On the other hand, the added modified fluoroplastic has lower amount, does not influence the mechanical property, thermal stability and the like of the insulating material, has higher tensile strength and wear resistance, and prolongs the service life of the cable. Meanwhile, the flame retardant and the antioxidant are added, so that the flame height and the smoke density of the material when the material burns when the material is heated can be reduced, and the safety of the material is improved.
In addition, the modified fluoroplastic can be produced independently and stored at normal temperature, the energy consumption of equipment is low, and the overall production cost can be further saved.
Detailed Description
Polyvinyl chloride (PVC): PVC is the main component in the cable insulation material, and accounts for about 60-80 parts by weight. PVC is a material with excellent comprehensive properties such as weather resistance, electrical insulation, mechanical strength, forming property and the like. Technical grade PVC powder or granules are generally used as preparation materials, and are added into a mixer, and all raw materials in other formulas are sequentially added for uniform mixing.
Polyethylene (PE): PE is also a main component in the cable insulation material, and accounts for about 60-80 parts by weight. PE can increase heat insulation, heat preservation and flexibility of the material, and reduce the crispness of the cable material, so that the processing and the laying of the cable material are facilitated. Generally, industrial PE powder or particles are used, added into a mixer, and all the raw materials in other formulas are added in sequence to be uniformly mixed.
Modified fluoroplastic: the modified fluoroplastic is used for improving the abrasion, heat resistance, corrosion resistance and the like of the cable insulation material. Common modifiers comprise nano aluminum oxide, isocyanate, aluminum phosphate and the like, and the inventor finds that the modified fluoroplastic obtained by the following method is particularly suitable for preparing cable insulation materials, and the weight ratio of the modified fluoroplastic in the materials is only about 15-20 parts: polyvinylidene fluoride (PVDF) is adopted as a base material, 6 percent of nano aluminum oxide, 5 percent of isocyanate, 3 percent of aluminum phosphate, 5 percent of calcium carbonate and 0.3 percent of black ferric oxide are added into the base material, the temperature is gradually increased to 130-150 ℃ under stirring, then 12 percent of oiling agent is added into the base material, the mixture is uniformly mixed, extruded and molded, and the mixture is naturally cooled, thus obtaining the modified fluoroplastic.
Antioxidant: antioxidants are intended to extend the useful life of cable insulation. The common antioxidants include hydroxylated diphenyl amine, androgenic phenols and the like, which account for 4-7 parts by weight of the total weight of the cable insulation material.
Flame retardant: the flame retardant is used for enhancing the fireproof performance of the cable insulation material. The common flame retardant comprises tribromopropane, hexametaphosphate and the like, and the flame retardant accounts for 4-7 parts by weight of the total weight of the cable insulation material.
Wear-resistant agent: the wear-resistant agent is used for increasing the wear resistance and abrasion resistance of the cable insulation material, and common wear-resistant agents include silicon dioxide, silica gel and the like, and the wear-resistant agent accounts for 5-8 parts by weight of the total weight of the cable insulation material.
And (3) a lubricant: the lubricant is used for reducing the friction coefficient of the material and facilitating the technological operations such as extrusion, processing and the like of the product, thereby realizing higher material production efficiency. Common lubricants include silicon dioxide, polydimethylsiloxane and the like, wherein the silicon dioxide and polydimethylsiloxane account for 2-3 parts by weight of the total weight of the cable insulation material.
Example 1: preparation of modified fluoroplastic
1000g of polyvinylidene fluoride (PVDF), 60g of nano aluminum oxide, 50g of TDI, 30g of aluminum phosphate, 50g of calcium carbonate and 3g of black iron oxide are added into a stirrer, the temperature is gradually increased to 130-150 ℃ under stirring, 120g of silicone oil is added, the mixture is uniformly mixed, the mixture is transferred into an extruder, the extrusion temperature is controlled at 110 ℃, the extrusion speed is 3-6m/min, the extrusion molding is carried out, and the natural cooling is carried out, thus obtaining the modified fluoroplastic.
Example 2: preparation of corrosion-resistant cable insulating material
Preheating stirring equipment to 120-140 ℃, adding 700g of polyvinyl chloride, 700g of polyethylene, 180g of modified fluoroplastic and 2L of ethylene glycol, and stirring for 3-6 hours at a constant temperature;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Example 3: preparation of corrosion-resistant cable insulating material
Preheating stirring equipment to 120-140 ℃, adding 800g of polyvinyl chloride, 600g of polyethylene, 150g of modified fluoroplastic and 2L of ethylene glycol, and stirring for 3-6 hours at a constant temperature;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Example 4: preparation of corrosion-resistant cable insulating material
Preheating stirring equipment to 120-140 ℃, adding 700g of polyvinyl chloride, 700g of polyethylene, 180g of modified fluoroplastic and 2L of ethylene glycol, and stirring for 3-6 hours at a constant temperature;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Comparative example 1: preparation of cable insulation material
Preheating stirring equipment to 120-140 ℃, adding 700g of polyvinyl chloride, 700g of polyethylene and 2L of ethylene glycol, and stirring for 3-6 hours at the temperature;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Comparative example 2: preparation of cable insulation material
Preheating stirring equipment to 120-140 ℃, adding 700g of polyvinyl chloride, 700g of polyethylene, 300g of polyvinylidene fluoride and 2L of ethylene glycol, and stirring for 3-6 hours at a constant temperature;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Comparative example 3: preparation of cable insulation material
Preheating stirring equipment to 120-140 ℃, adding 700g of polyvinyl chloride, 700g of polyethylene, 600g of polyvinylidene fluoride and 2L of ethylene glycol, and keeping the temperature and stirring for 3-6 hours;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, 50g of hydroxylated diphenyl ammonia (antioxidant), 50g of tribromopropane (flame retardant), 60g of silicon dioxide (wear-resistant agent) and 20g of polydimethylsiloxane (lubricant) are added into the stirring equipment, and the mixture is continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion, the extrusion temperature is controlled to be 100-115 ℃, and the extrusion speed is controlled to be 3-6m/min;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
Experimental example 1: corrosion resistance detection
The detection method comprises the following steps: corrosion resistance was tested in an ultra-high humidity corrosion resistant test chamber (YWX/Q-150B Kemai) and two sets of 50.00g each of the insulation samples prepared in examples 2-4 and comparative examples 1-3 were precisely weighed and placed in the chamber with the following parameters:
temperature range: 45-55 ℃;
temperature uniformity: 2 DEG C
Spray settling volume: 1-2 ml/80cm 2 /h
Spraying mode: periodic spray
Samples were taken on days 0 (50 g each), 7, 14, 21, and 28, and were weighed after wiping, and the results are shown in the following table.
TABLE 1
From the table above, it can be seen that the cable insulation material prepared by adding the modified fluoroplastic of the application maintains good corrosion resistance in both neutral salt spray test and acetate salt spray test, and the appearance of the material has no obvious change; in comparative example 1, the corrosion resistance is relatively worst because no modified fluoroplastic or fluoroplastic is added, especially in the acetate salt spray test, the corrosion change is aggravated, and the addition amount of the common fluoroplastic (polyvinylidene fluoride) is required to be increased to 2-3 times, so that the production cost is greatly increased. In addition, the mechanical properties, thermal stability, tensile strength and abrasion resistance of the insulating material samples in examples 2 to 4 and comparative examples 1 to 3 of the present application all meet the use standards.

Claims (8)

1. The corrosion-resistant cable insulation material comprises the following components in parts by weight: 60-80 parts of polyvinyl chloride, 60-80 parts of polyethylene, 15-20 parts of modified fluoroplastic, 4-7 parts of antioxidant, 4-7 parts of flame retardant, 5-8 parts of wear-resistant agent and 2-3 parts of lubricant.
2. The corrosion resistant cable insulation of claim 1, wherein the cable insulation comprises the following components in parts by weight: 70 parts of polyvinyl chloride, 70 parts of polyethylene, 18 parts of modified fluoroplastic, 5 parts of antioxidant, 5 parts of flame retardant, 6 parts of wear-resistant agent and 2 parts of lubricant.
3. The corrosion resistant cable insulation material of claim 1 or 2, wherein the modified fluoroplastic is prepared by: polyvinylidene fluoride (PVDF) is adopted as a base material, nano aluminum oxide, isocyanate, aluminum phosphate, calcium carbonate and black ferric oxide are added into the base material, the temperature is gradually increased to 130-150 ℃ under stirring, then an oiling agent is added into the base material, the mixture is uniformly mixed, extruded and molded, and the mixture is naturally cooled, so that the modified fluoroplastic is obtained.
4. The corrosion-resistant cable insulation material according to claim 3, wherein the nano alumina is added in an amount of 5 to 8%, the isocyanate is added in an amount of 5 to 10%, the aluminum phosphate is added in an amount of 2 to 4%, the calcium carbonate is added in an amount of 5 to 8%, the black iron oxide is added in an amount of 0.2 to 0.5%, and the oil is added in an amount of 10 to 13% based on the weight of polyvinylidene fluoride.
5. The corrosion-resistant cable insulation material according to claim 4, wherein the amount of nano alumina added is 6%, the amount of isocyanate added is 5%, the amount of aluminum phosphate added is 3%, the amount of calcium carbonate added is 5%, the amount of black iron oxide added is 0.3%, and the amount of oil added is 12% as compared with the weight of polyvinylidene fluoride.
6. A corrosion resistant cable insulation according to claim 3 wherein the extrusion temperature is controlled below 120 ℃ and the extrusion speed is 3-6m/min.
7. A method of preparing the corrosion resistant cable insulation of any of claims 1-6, the method comprising:
preheating stirring equipment to 120-140 ℃, adding polyvinyl chloride, polyethylene, modified fluoroplastic and an organic solvent, and keeping the temperature and stirring for 3-6 hours;
step two, the temperature of the stirring equipment is reduced to 100-110 ℃, and an antioxidant, a flame retardant, an antiwear agent and a lubricant are added into the stirring equipment to be continuously mixed to obtain a mixture;
step three, the mixture is sent to an extruder for extrusion;
and fourthly, cooling the extruded insulating material by a high-speed cooler, and cutting by a cutting machine after cooling to obtain the cable insulating material with the required size.
8. The process according to claim 7, wherein the extrusion temperature is controlled to be 100 to 115℃and the extrusion speed is controlled to be 3 to 6m/min in the third step.
CN202310906478.XA 2023-07-24 2023-07-24 Corrosion-resistant cable insulation material and preparation method thereof Pending CN116622174A (en)

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CN109825004A (en) * 2019-02-20 2019-05-31 南通壹选工业设计有限公司 Oil resistance anticorrosion loses PVC plastic
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CN109825004A (en) * 2019-02-20 2019-05-31 南通壹选工业设计有限公司 Oil resistance anticorrosion loses PVC plastic
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