CN111048261A - Anti-aging flame-retardant cable and processing technology - Google Patents

Anti-aging flame-retardant cable and processing technology Download PDF

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CN111048261A
CN111048261A CN201911000600.7A CN201911000600A CN111048261A CN 111048261 A CN111048261 A CN 111048261A CN 201911000600 A CN201911000600 A CN 201911000600A CN 111048261 A CN111048261 A CN 111048261A
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parts
cable
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product
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CN111048261B (en
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刘德文
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Dongguan Fuchuan Precision Industry Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • 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
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/321—Phosphates
    • C08K2003/322—Ammonium phosphate
    • C08K2003/323—Ammonium polyphosphate
    • 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
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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Abstract

The invention provides an aging-resistant flame-retardant cable and a processing technology thereof, and the cable has excellent aging resistance, flame retardance and mechanical properties. The method comprises the steps of firstly twisting a plurality of wires into a bundle, sequentially wrapping a wrapping layer and an insulating layer on the outer side to obtain a wire core, then arranging a plurality of groups of wire cores into the bundle to form a cable core, and finally sequentially wrapping an isolating layer and a sheath layer on the outer side of the cable core to obtain the cable. The sheath layer takes methyl vinyl silicone rubber, ethylene propylene diene monomer rubber and thermoplastic polyester elastomer as main raw materials, and ensures the basic mechanical property and aging resistance of the product. The method comprises the steps of coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing an obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then performing modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxysilane to obtain an organic modified filler which can be well fused with methyl vinyl and the like, so that the mechanical property of the product is prevented from being influenced.

Description

Anti-aging flame-retardant cable and processing technology
Technical Field
The invention relates to the technical field of wires and cables, in particular to an anti-aging flame-retardant cable and a processing technology thereof.
Background
A cable is a conductor made of one or more conductors insulated from each other and an outer insulating sheath that carries power or information from one location to another. Typically a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, the entire outer surface being coated with a highly insulating coating. They are composed of single or multi-strand wires and soft copper conductors, and are used for connecting circuits, electric appliances and the like.
The power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater, and is used for transmitting and distributing electric energy. In order to protect urban and rural living and investment environment and reduce overhead power cable transmission lines to achieve the purpose of beautifying cities, the power cable transmission lines are gradually developed from overhead to buried, and the underground of the cables has higher requirements on the cables.
Flame retardancy is a fundamental requirement for power cables to prevent electrical short circuits. The commonly used outer insulating protective layer of the power cable is mostly made of high polymer materials such as polyethylene, polypropylene, polyvinyl chloride and the like, and the polymer materials can generate combustible gas after being heated, melted and decomposed. At high temperature, these gases react with oxygen and burn, and a large amount of heat is generated during burning, which promotes the polymer to further melt, decompose and continuously burn, thus enlarging the fire and causing great loss. In China, the fire loss caused by cables is only up to billions of yuan-renminty coins every year, people pay more and more attention to the flame-retardant problem of wires and cables, people begin to research various flame-retardant fireproof materials, and in order to improve the flame-retardant performance of the wires and cables, halogen flame retardants are usually added to obtain the flame-retardant cable material. However, the flame-retardant cable material can generate a large amount of smoke and hydrogen halide gas during combustion, so that people can be suffocated easily, and a secondary disaster is caused.
Therefore, research on development of halogen-free flame-retardant cable materials becomes a hot spot at present, almost all cable rubber sheath materials have high requirements on aging resistance, individual requirements have a service life of 60-80 years, and some cable rubber sheath materials even reach more than 100 years under all weather conditions, and research on cables with aging resistance and flame retardance has become a problem which needs to be solved urgently at present.
Patent CN106751362B discloses a high temperature resistant halogen-free flame retardant thermoplastic elastomer cable material, which is prepared from thermoplastic dynamic vulcanized elastomer, homo-polypropylene, styrene elastomer, intumescent flame retardant, rubber oil, lubricant, antioxidant, light stabilizer, etc. by means of synergistic cooperation of different components of the intumescent flame retardant, the cable material has good flame retardant performance, but the cable material has poor aging resistance, and is still difficult to meet the current high-standard requirements on cables.
Disclosure of Invention
The invention aims to provide an aging-resistant flame-retardant cable and a processing technology thereof, which have excellent aging resistance and flame retardance and excellent mechanical properties.
In order to achieve the purpose, the invention is realized by the following scheme:
the utility model provides a processing technology of ageing-resistant flame retarded cable, twists the beam forming each other and wraps up around covering and insulating layer in proper order in the outside earlier with many wires, obtains the sinle silk, then arranges multiunit sinle silk beam forming and forms the cable core, wraps up isolation layer and restrictive coating in proper order in the cable core outside at last, obtains the cable, wherein, with parts by weight, the restrictive coating is prepared through following method and is obtained:
(1) mixing 100 parts of methyl vinyl silicone rubber, 30-40 parts of ethylene propylene diene monomer, 15-20 parts of thermoplastic polyester elastomer, 5-8 parts of carboxyl liquid nitrile rubber, 4-6 parts of a structure control agent and 5-8 parts of an organic modified filler by using a kneading machine to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2-1.5 parts of vulcanizing agent and 0.2-0.3 part of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly, and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
Preferably, in the step (1), the structure control agent is selected from any one of diphenylsilanediol, hexamethyldisilazane, or cyclic silazane.
Preferably, in the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound is as follows: mixing and heating 1 part of polyphosphoric acid, 0.1-0.2 part of phosphoric acid, 0.3-0.5 part of urea, 0.03-0.05 part of aluminum hydroxide and 0.02-0.03 part of zinc borate to 160-170 ℃ in parts by weight, preserving heat for 1-1.5 hours, crushing and sieving with a 300-mesh sieve to obtain the compound.
Preferably, the compound and 2-3 parts of magnesium sulfate are added into 10-15 parts of water together to obtain a suspension, then 1.2-1.5 parts of calcium hydroxide is added into the suspension, the mixture is stirred for 1-2 hours at the temperature of 60-80 ℃, and filter residue is obtained through filtration, so that the product is obtained.
Preferably, the product is uniformly stirred with 10 parts of pentaerythritol triallyl ether, 6-8 parts of 3-aminopropyl trimethoxy silane, 0.08-0.1 part of tetrabutyltin, 1-1.2 parts of ethyl naphthol, 0.7-0.9 part of hexacyclic stone powder and 0.5-0.8 part of silicon carbide fiber, then 0.08-0.1 part of tetrabutyltin is added, and the mixture is reacted at 80-90 ℃ for 50-80 minutes to obtain the organic modified filler.
Preferably, the conducting wire is a fine-twisted oxygen-free copper wire, and the diameter of the conducting wire is not more than 0.1 mm.
Preferably, the material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum.
Preferably, the thickness around the covering is 0.08 ~ 0.1mm, and the thickness of insulating layer is 0.2 ~ 0.3mm, and the thickness of isolation layer is 0.2 ~ 0.3mm, and the thickness of restrictive coating is 1 ~ 2 mm.
Preferably, in the step (2), the mixing process conditions are as follows: treating at 160-190 ℃ for 2-3 hours, heating for 50-60 minutes in a vacuum state, cooling to room temperature (25 ℃) and discharging to obtain the rubber compound.
Preferably, in step (2), the vulcanizing agent is bisphenol AF.
Preferably, the specific method of step (3) is: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3-5 minutes at 120-150 ℃ and 5-8 MPa and 10-12 minutes at 230-250 ℃ and 15-18 MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and placing for 7-9 hours at the temperature of 250-280 ℃ to obtain the sheath layer.
The aging-resistant flame-retardant cable is obtained by the processing technology.
The invention has the beneficial effects that:
the invention firstly twists a plurality of wires to form a bundle, and sequentially wraps a wrapping layer and an insulating layer on the outer side to obtain a wire core, then arranges a plurality of groups of wire cores to form a cable core in a bundled manner, and finally sequentially wraps an isolating layer and a sheath layer on the outer side of the cable core to obtain the cable.
1. The sheath layer takes methyl vinyl silicone rubber, ethylene propylene diene monomer rubber and thermoplastic polyester elastomer as main raw materials, the methyl vinyl silicone rubber has good high temperature resistance, low temperature resistance and aging resistance, the ethylene propylene diene monomer rubber has good heat resistance and weather resistance, the thermoplastic polyester elastomer has excellent elasticity, weather resistance and mechanical property, the three are blended and vulcanized, the respective advantages are kept, in addition, double bonds contained in the methyl vinyl silicone rubber and the ethylene propylene diene monomer rubber react, the double bonds and ester groups in the thermoplastic polyester elastomer can also form an unstable structure, the main chains and branched chains of the methyl vinyl silicone rubber, the ethylene propylene diene monomer rubber and the thermoplastic polyester elastomer are promoted to be close to each other and wound, and the basic mechanical property and the aging resistance of the product are ensured.
2. The method comprises the steps of coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then performing modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxysilane to obtain an organic modified filler which can be well fused with methyl vinyl silicone rubber, ethylene propylene diene monomer, thermoplastic polyester elastomer and the like, so that the mechanical property of the product is prevented from being influenced.
After the ammonium polyphosphate-aluminum hydroxide-zinc borate compound is coated with magnesium hydroxide on the surface, the ammonium polyphosphate-aluminum hydroxide-zinc borate compound expands under the action of heat, so that the magnesium hydroxide on the surface is rapidly heated and decomposed to release bound water and absorb a large amount of latent heat to reduce the surface temperature of the cable in flame, and the composite flame retardant has the effects of inhibiting the decomposition of a polymer and cooling generated combustible gas and plays a good flame retardant role.
The ethyl naphthol has good ageing resistance, and the hexacyclic stone powder has unique energy characteristics, so that the influence of ageing factors such as ultraviolet rays on the overall performance can be reduced, and the ageing resistance of the ethyl naphthol is improved. The silicon carbide fiber can absorb ultraviolet rays, and the aging resistance of the product is further improved.
Hydroxyl in pentaerythritol triallyl ether reacts with hydroxyl after hydrolysis of 3-aminopropyltrimethoxysilane, so that pentaerythritol triallyl ether and 3-aminopropyltrimethoxysilane (the applicant screens organosilane raw materials, compared with other organosilane raw materials, the product obtained by using the 3-aminopropyltrimethoxysilane as a raw material has better mechanical property, aging resistance and flame retardance) are combined into a whole, and the product is added into a system to play a role of a bridge between organic materials and inorganic materials, wherein contained double bonds can react with double bonds in methyl vinyl silicone rubber and ethylene propylene diene monomer, so that the full fusion of the materials is promoted.
3. According to the invention, 1, 6-diphenyl-1, 3, 5-hexatriene is added, the crosslinking effect of a chain structure can avoid the agglomeration of a vulcanizing agent, and in addition, phenyl groups at two ends also play a role in isolation to drive the vulcanizing agent to disperse, promote the vulcanization, and fully react, so that various performances of the product are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 utility model provides an ageing-resistant flame retarded cable's processing technology, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 30kg of ethylene propylene diene monomer, 15kg of thermoplastic polyester elastomer, 5kg of carboxyl liquid nitrile rubber, 4kg of structure control agent and 5kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2kg of vulcanizing agent and 0.2kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is diphenyl silanediol.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: mixing and heating 1kg of polyphosphoric acid, 0.1kg of phosphoric acid, 0.3kg of urea, 0.03kg of aluminum hydroxide and 0.02kg of zinc borate to 160 ℃, preserving heat for 1 hour, crushing and sieving by a 300-mesh sieve to obtain the compound. Adding the compound and 2kg of magnesium sulfate into 10kg of water to obtain a suspension, then adding 1.2kg of calcium hydroxide into the suspension, stirring for 1 hour at 60 ℃, and filtering to obtain filter residue, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 6kg of 3-aminopropyl trimethoxy silane, 0.08kg of tetrabutyltin, 1kg of ethyl naphthol, 0.7kg of hexacyclic stone powder and 0.5kg of silicon carbide fiber, then adding 0.08kg of tetrabutyltin, and reacting for 50 minutes at 80 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.08mm, and the thickness of insulating layer is 0.2mm, and the thickness of isolation layer is 0.2mm, and the thickness of restrictive coating is 1 mm.
In the step (2), the mixing process conditions are as follows: the mixture was treated at 160 ℃ for 2 hours, then heated under vacuum for 50 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3 minutes at 120 ℃ and 5MPa and 10 minutes at 230 ℃ and 15MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 7 hours at the temperature of 250 ℃ to obtain the sheath layer.
Example 2
The utility model provides an ageing-resistant flame retarded cable's processing technology, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 40kg of ethylene propylene diene monomer, 20kg of thermoplastic polyester elastomer, 8kg of carboxyl liquid nitrile rubber, 6kg of structure control agent and 8kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.5kg of vulcanizing agent and 0.3kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is hexamethyldisilazane.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: 1kg of polyphosphoric acid, 0.2kg of phosphoric acid, 0.5kg of urea, 0.05kg of aluminum hydroxide and 0.03kg of zinc borate are mixed and heated to 170 ℃, heat preservation treatment is carried out for 1.5 hours, and the mixture is crushed and sieved by a 300-mesh sieve to obtain the compound. Adding the compound and 3kg of magnesium sulfate into 15kg of water to obtain a suspension, then adding 1.5kg of calcium hydroxide into the suspension, stirring for 2 hours at 80 ℃, and filtering to obtain filter residues, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 8kg of 3-aminopropyl trimethoxy silane, 0.1kg of tetrabutyltin, 1.2kg of ethyl naphthol, 0.9kg of hexacyclic stone powder and 0.8kg of silicon carbide fiber, adding 0.1kg of tetrabutyltin, and reacting for 80 minutes at 90 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.1mm, and the thickness of insulating layer is 0.3mm, and the thickness of isolation layer is 0.3mm, and the thickness of restrictive coating is 2 mm.
In the step (2), the mixing process conditions are as follows: after treatment at 190 ℃ for 3 hours, the mixture was heated under vacuum for 60 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 5 minutes at 150 ℃ and 8MPa and 12 minutes at 250 ℃ and 18MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 9 hours at 280 ℃ to obtain the sheath layer.
Example 3
The utility model provides an ageing-resistant flame retarded cable's processing technology, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 30kg of ethylene propylene diene monomer, 20kg of thermoplastic polyester elastomer, 5kg of carboxyl liquid nitrile rubber, 6kg of structure control agent and 5kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.5kg of vulcanizing agent and 0.2kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is a cyclic silazane.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: 1kg of polyphosphoric acid, 0.2kg of phosphoric acid, 0.3kg of urea, 0.05kg of aluminum hydroxide and 0.02kg of zinc borate are mixed and heated to 170 ℃, heat preservation treatment is carried out for 1 hour, and the mixture is crushed and sieved by a 300-mesh sieve to obtain the compound. And adding the compound and 3kg of magnesium sulfate into 10kg of water to obtain a suspension, adding 1.5kg of calcium hydroxide into the suspension, stirring for 2 hours at 60 ℃, and filtering to obtain filter residues, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 6kg of 3-aminopropyl trimethoxy silane, 0.1kg of tetrabutyltin, 1kg of ethyl naphthol, 0.9kg of hexacyclic stone powder and 0.5kg of silicon carbide fiber, then adding 0.1kg of tetrabutyltin, and reacting for 80 minutes at 80 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.08mm, and the thickness of insulating layer is 0.3mm, and the thickness of isolation layer is 0.2mm, and the thickness of restrictive coating is 2 mm.
In the step (2), the mixing process conditions are as follows: the mixture was treated at 160 ℃ for 3 hours, then heated under vacuum for 50 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 5 minutes at 150 ℃ and 5MPa and 10 minutes at 230 ℃ and 18MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 7 hours at the temperature of 280 ℃ to obtain the sheath layer.
Example 4
The utility model provides an ageing-resistant flame retarded cable's processing technology, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 40kg of ethylene propylene diene monomer, 15kg of thermoplastic polyester elastomer, 8kg of carboxyl liquid nitrile rubber, 4kg of structure control agent and 8kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2kg of vulcanizing agent and 0.3kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is diphenyl silanediol.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: 1kg of polyphosphoric acid, 0.1kg of phosphoric acid, 0.5kg of urea, 0.03kg of aluminum hydroxide and 0.03kg of zinc borate are mixed and heated to 160 ℃, and the mixture is subjected to heat preservation treatment for 1.5 hours, crushed and sieved by a 300-mesh sieve to obtain the compound. Adding the compound and 2kg of magnesium sulfate into 15kg of water to obtain a suspension, then adding 1.2kg of calcium hydroxide into the suspension, stirring for 1 hour at 80 ℃, and filtering to obtain filter residue, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 8kg of 3-aminopropyl trimethoxy silane, 0.08kg of tetrabutyltin, 1.2kg of ethyl naphthol, 0.7kg of hexacyclic stone powder and 0.8kg of silicon carbide fiber, then adding 0.08kg of tetrabutyltin, and reacting for 50 minutes at 90 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.1mm, and the thickness of insulating layer is 0.2mm, and the thickness of isolation layer is 0.3mm, and the thickness of restrictive coating is 1 mm.
In the step (2), the mixing process conditions are as follows: after 2 hours at 190 ℃, the mixture was heated under vacuum for 60 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3 minutes at 120 ℃ and 8MPa and 12 minutes at 250 ℃ and 15MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 9 hours at the temperature of 250 ℃ to obtain the sheath layer.
Example 5
The utility model provides an ageing-resistant flame retarded cable's processing technology, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 35kg of propylene rubber, 17kg of performance polyester elastomer, 6kg of carboxyl liquid nitrile rubber, 5kg of structure control agent and 6kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.4kg of vulcanizing agent and 0.25kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is hexamethyldisilazane.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: 1kg of polyphosphoric acid, 0.15kg of phosphoric acid, 0.4kg of urea, 0.04kg of aluminum hydroxide and 0.025kg of zinc borate are mixed and heated to 165 ℃, and the mixture is subjected to heat preservation treatment for 1.5 hours, crushed and sieved by a 300-mesh sieve to obtain the compound. And adding the compound and 2.5kg of magnesium sulfate into 12kg of water to obtain a suspension, adding 1.3kg of calcium hydroxide into the suspension, stirring for 1.5 hours at 70 ℃, and filtering to obtain filter residues, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 7kg of 3-aminopropyl trimethoxy silane, 0.09kg of tetrabutyltin, 1.1kg of ethyl naphthol, 0.8kg of hexacyclic stone powder and 0.7kg of silicon carbide fiber, then adding 0.09kg of tetrabutyltin, and reacting at 85 ℃ for 70 minutes to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.09mm, and the thickness of insulating layer is 0.25mm, and the thickness of isolation layer is 0.23mm, and the thickness of restrictive coating is 1.5 mm.
In the step (2), the mixing process conditions are as follows: after treatment at 180 ℃ for 2 hours, the mixture was heated under vacuum for 55 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and sequentially carrying out hot pressing for 4 minutes at 130 ℃ and 6MPa and 11 minutes at 240 ℃ and 17MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and placing for 8 hours at 260 ℃ to obtain the sheath layer.
Comparative example 1
The utility model provides a processing technology of cable, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 45kg of ethylene propylene diene monomer, 5kg of carboxyl liquid nitrile rubber, 4kg of structure control agent and 5kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2kg of vulcanizing agent and 0.2kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is diphenyl silanediol.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: mixing and heating 1kg of polyphosphoric acid, 0.1kg of phosphoric acid, 0.3kg of urea, 0.03kg of aluminum hydroxide and 0.02kg of zinc borate to 160 ℃, preserving heat for 1 hour, crushing and sieving by a 300-mesh sieve to obtain the compound. Adding the compound and 2kg of magnesium sulfate into 10kg of water to obtain a suspension, then adding 1.2kg of calcium hydroxide into the suspension, stirring for 1 hour at 60 ℃, and filtering to obtain filter residue, namely the product. And (2) uniformly stirring and mixing the product with 10kg of pentaerythritol triallyl ether, 6kg of 3-aminopropyl trimethoxy silane, 0.08kg of tetrabutyltin, 1kg of ethyl naphthol, 0.7kg of hexacyclic stone powder and 0.5kg of silicon carbide fiber, then adding 0.08kg of tetrabutyltin, and reacting for 50 minutes at 80 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.08mm, and the thickness of insulating layer is 0.2mm, and the thickness of isolation layer is 0.2mm, and the thickness of restrictive coating is 1 mm.
In the step (2), the mixing process conditions are as follows: the mixture was treated at 160 ℃ for 2 hours, then heated under vacuum for 50 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3 minutes at 120 ℃ and 5MPa and 10 minutes at 230 ℃ and 15MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 7 hours at the temperature of 250 ℃ to obtain the sheath layer.
Comparative example 2
The utility model provides a processing technology of cable, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 30kg of ethylene propylene diene monomer, 15kg of thermoplastic polyester elastomer, 5kg of carboxyl liquid nitrile rubber, 4kg of structure control agent and 5kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by mixing an ammonium polyphosphate-aluminum hydroxide-zinc borate compound with ethyl naphthol, hexacyclic ring stone powder and silicon carbide fiber and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2kg of vulcanizing agent and 0.2kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is diphenyl silanediol.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: mixing and heating 1kg of polyphosphoric acid, 0.1kg of phosphoric acid, 0.3kg of urea, 0.03kg of aluminum hydroxide and 0.02kg of zinc borate to 160 ℃, preserving heat for 1 hour, crushing and sieving by a 300-mesh sieve to obtain the compound. And uniformly stirring and mixing the compound with 10kg of pentaerythritol triallyl ether, 6kg of 3-aminopropyl trimethoxy silane, 0.08kg of tetrabutyltin, 1kg of ethyl naphthol, 0.7kg of hexacyclic stone powder and 0.5kg of silicon carbide fiber, adding 0.08kg of tetrabutyltin, and reacting for 50 minutes at 80 ℃ to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.08mm, and the thickness of insulating layer is 0.2mm, and the thickness of isolation layer is 0.2mm, and the thickness of restrictive coating is 1 mm.
In the step (2), the mixing process conditions are as follows: the mixture was treated at 160 ℃ for 2 hours, then heated under vacuum for 50 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3 minutes at 120 ℃ and 5MPa and 10 minutes at 230 ℃ and 15MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 7 hours at the temperature of 250 ℃ to obtain the sheath layer.
Comparative example 3
The utility model provides a processing technology of cable, earlier with many wires transposition beam forming each other and wrap up around covering and insulating layer in proper order in the outside, obtain the sinle silk, then arrange multiunit sinle silk beam forming and form the cable core, wrap up isolation layer and restrictive coating in proper order in the cable core outside at last, obtain the cable, wherein, the restrictive coating is prepared through following method and obtains:
(1) mixing 100kg of methyl vinyl silicone rubber, 30kg of ethylene propylene diene monomer, 15kg of thermoplastic polyester elastomer, 5kg of carboxyl liquid nitrile rubber, 4kg of structure control agent and 5kg of organic modified filler by using a kneader to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2kg of vulcanizing agent and 0.2kg of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
In the step (1), the structure control agent is diphenyl silanediol.
In the step (1), the preparation method of the ammonium polyphosphate-aluminum hydroxide-zinc borate compound comprises the following steps: mixing and heating 1kg of polyphosphoric acid, 0.1kg of phosphoric acid, 0.3kg of urea, 0.03kg of aluminum hydroxide and 0.02kg of zinc borate to 160 ℃, preserving heat for 1 hour, crushing and sieving by a 300-mesh sieve to obtain the compound. Adding the compound and 2kg of magnesium sulfate into 10kg of water to obtain a suspension, then adding 1.2kg of calcium hydroxide into the suspension, stirring for 1 hour at 60 ℃, and filtering to obtain filter residue, namely the product. And (2) uniformly stirring the product, 10kg of pentaerythritol triallyl ether, 6kg of 3-aminopropyltrimethoxysilane, 0.08kg of tetrabutyltin, 1.7kg of ethyl naphthol and 0.5kg of silicon carbide fibers, adding 0.08kg of tetrabutyltin, and reacting at 80 ℃ for 50 minutes to obtain the organic modified filler.
The lead is a fine twisted oxygen-free copper wire, and the diameter of the lead is not more than 0.1 mm. The material around the covering is aramid fiber, and the material of insulating layer is high density polyethylene, and the material of isolation layer is the compound area of plastic-aluminum. The thickness around the covering is 0.08mm, and the thickness of insulating layer is 0.2mm, and the thickness of isolation layer is 0.2mm, and the thickness of restrictive coating is 1 mm.
In the step (2), the mixing process conditions are as follows: the mixture was treated at 160 ℃ for 2 hours, then heated under vacuum for 50 minutes, cooled to room temperature (25 ℃) and discharged to obtain a rubber compound.
In the step (2), the vulcanizing agent is bisphenol AF.
The specific method of the step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3 minutes at 120 ℃ and 5MPa and 10 minutes at 230 ℃ and 15MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and standing for 7 hours at the temperature of 250 ℃ to obtain the sheath layer.
Test examples
The sheath layers of the cables obtained in examples 1 to 5 and comparative examples 1 to 3 were subjected to the relevant performance tests, and the results are shown in table 1. Wherein, the tensile strength and the elongation refer to ASTM D412, the aging test refers to ASTM D573, and the flame retardant performance standard refers to UL 94.
TABLE 1 Performance test results
Figure DEST_PATH_IMAGE002
As can be seen from Table 1, the cables obtained in examples 1 to 3 have excellent mechanical properties, aging resistance and flame retardancy. Comparative example 1 the thermoplastic polyester elastomer was omitted when preparing the sheath layer, and the mechanical properties and aging resistance were significantly deteriorated, indicating that the introduction of the thermoplastic polyester elastomer contributes to the fusion between the rubber materials; comparative example 2 the ammonium polyphosphate-aluminum hydroxide-zinc borate compound surface is not coated with magnesium hydroxide, the flame retardant property is obviously deteriorated, which shows that the existence of magnesium hydroxide has the effect of enhancing the flame retardant effect of the compound; comparative example 3 omits the hexacyclic stone powder, the aging resistance is obviously deteriorated, which shows that the hexacyclic stone powder with unique energy characteristics has synergistic effect on the aging resistance effect of other aging resistant components.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a processing technology of ageing-resistant flame retarded cable, twists the beam forming each other and wraps up around covering and insulating layer in proper order in the outside earlier with many wires, obtains the sinle silk, then arranges multiunit sinle silk beam forming and forms the cable core, wraps up isolation layer and restrictive coating in proper order in the cable core outside at last, obtains the cable, its characterized in that, by weight, the restrictive coating is prepared through following method and is obtained:
(1) mixing 100 parts of methyl vinyl silicone rubber, 30-40 parts of ethylene propylene diene monomer, 15-20 parts of thermoplastic polyester elastomer, 5-8 parts of carboxyl liquid nitrile rubber, 4-6 parts of a structure control agent and 5-8 parts of an organic modified filler by using a kneading machine to obtain a mixture; the organic modified filler is obtained by coating magnesium hydroxide on the surface of an ammonium polyphosphate-aluminum hydroxide-zinc borate compound, mixing the obtained product with ethyl naphthol, hexacyclic stone powder and silicon carbide fiber, and then carrying out modification treatment by utilizing pentaerythritol triallyl ether and 3-aminopropyl trimethoxy silane;
(2) then adding 1.2-1.5 parts of vulcanizing agent and 0.2-0.3 part of 1, 6-diphenyl-1, 3, 5-hexatriene into the mixture, mixing uniformly, and then mixing to obtain a rubber compound;
(3) and finally, carrying out shaping and vulcanizing treatment on the rubber compound to obtain the sheath layer.
2. The process of claim 1, wherein in step (1), the structure control agent is selected from any one of diphenylsilanediol, hexamethyldisilazane, or cyclic silazane.
3. The process according to any one of claims 1 to 2, wherein in step (1), the ammonium polyphosphate-aluminum hydroxide-zinc borate complex is prepared by the following method: mixing and heating 1 part of polyphosphoric acid, 0.1-0.2 part of phosphoric acid, 0.3-0.5 part of urea, 0.03-0.05 part of aluminum hydroxide and 0.02-0.03 part of zinc borate to 160-170 ℃ in parts by weight, preserving heat for 1-1.5 hours, crushing and sieving with a 300-mesh sieve to obtain the compound.
4. The processing technology of claim 1, wherein the compound and 2-3 parts of magnesium sulfate are added into 10-15 parts of water together to obtain a suspension, 1.2-1.5 parts of calcium hydroxide is added into the suspension, the mixture is stirred for 1-2 hours at the temperature of 60-80 ℃, and filter residue is obtained through filtration, so that the product is obtained.
5. The processing technology of claim 1, wherein the product is uniformly mixed with 10 parts of pentaerythritol triallyl ether, 6-8 parts of 3-aminopropyltrimethoxysilane, 0.08-0.1 part of tetrabutyltin, 1-1.2 parts of ethyl naphthol, 0.7-0.9 part of hexacyclic stone powder and 0.5-0.8 part of silicon carbide fiber, and then 0.08-0.1 part of tetrabutyltin is added to react at 80-90 ℃ for 50-80 minutes to obtain the organic modified filler.
6. The process of claim 1, wherein the wire is a fine-twisted oxygen-free copper wire with a diameter of no more than 0.1 mm.
7. The processing technology of claim 1, wherein the wrapping layer is 0.08-0.1 mm thick, the insulating layer is 0.2-0.3 mm thick, the isolating layer is 0.2-0.3 mm thick, and the sheath layer is 1-2 mm thick.
8. The process according to any one of claims 1 to 7, wherein in step (2), the mixing process conditions are as follows: treating for 2-3 hours at 160-190 ℃, then heating for 50-60 minutes in a vacuum state, cooling to room temperature, and discharging to obtain the rubber compound.
9. The process according to claim 1, wherein the specific method of step (3) is as follows: cutting and pressing the rubber compound, and then sequentially carrying out hot pressing for 3-5 minutes at 120-150 ℃ and 5-8 MPa and 10-12 minutes at 230-250 ℃ and 15-18 MPa by using a hot press to obtain a shaped vulcanized product; and then placing the shaped vulcanized product in an oven, and placing for 7-9 hours at the temperature of 250-280 ℃ to obtain the sheath layer.
10. An aging-resistant flame-retardant cable obtained by the processing technology of any one of claims 1 to 9.
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CN106835833A (en) * 2017-02-21 2017-06-13 浙江科技学院 A kind of environmental-protection flame-retardant filler and preparation method thereof
CN109438989A (en) * 2018-11-07 2019-03-08 长沙小如信息科技有限公司 A kind of organic silicon rubber
CN109880375A (en) * 2019-02-28 2019-06-14 国网河南省电力公司新野县供电公司 A kind of ageing-resistant silicon rubber composite material and preparation method thereof

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CN111968798A (en) * 2020-08-13 2020-11-20 无锡市华美电缆有限公司 Preparation method of anti-corrosion combustion-supporting wire and cable
CN117700625A (en) * 2023-12-19 2024-03-15 东莞市厚铧橡胶科技有限公司 Rubber for toy tire and preparation method thereof
CN117700625B (en) * 2023-12-19 2024-05-10 东莞市厚铧橡胶科技有限公司 Rubber for toy tire and preparation method thereof

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