CN110607048A - Preparation method of high-temperature-resistant cable sheath - Google Patents
Preparation method of high-temperature-resistant cable sheath Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- 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
- H01B3/447—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 acrylic compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention discloses a preparation method of a high-temperature-resistant cable sheath, which comprises the following steps: adding polyacrylate and chlorinated polyethylene into an internal mixer according to the weight parts for plastication to obtain premix; adding a reinforcing agent, a filling agent and a plasticizer into the obtained premix, and mixing in an internal mixer; adding a lubricant and a flame retardant into the obtained material, mixing in an internal mixer, and thinly passing and arranging the material; feeding the materials into an internal mixer, adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing; putting the materials into a thin-pass and glue-swing machine, and pressing and molding the materials in a calender; according to the preparation method of the high-temperature-resistant cable sheath, the mixture of the polyacrylate and the chlorinated polyethylene is used as the main framework material, the polyacrylate has excellent cold resistance, heat resistance and oil resistance, but the processing technology of the polyacrylate is poor, and the chlorinated polyethylene and the polyacrylate are mixed, so that the mechanical property and the heat resistance of the rubber are improved.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a preparation method of a high-temperature-resistant cable sheath.
Background
With the development of the wire and cable technology, people put forward more strict performance requirements on cable products, and the requirements on the sheath material for the cable, which is one of the important components of the cable products, are higher and higher. The cable sheath needs to have good insulation and flame retardancy, and in addition, the cable sheath needs to have excellent physical and mechanical properties, especially tensile strength and tear strength.
The existing chlorinated polyethylene rubber insulating sheath is mainly used for flame retardance and insulating property, physical and mechanical properties of the existing chlorinated polyethylene rubber insulating sheath are often ignored, dangers such as damage of the insulating sheath and the like often occur in a working environment with complex working conditions, cable cores are further broken, and great potential safety hazards exist in the using process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a high-temperature-resistant cable sheath, which can solve the problems of poor mechanical property and easiness in damage of the high-temperature-resistant cable sheath in the prior art.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a preparation method of a high-temperature-resistant cable sheath, which comprises the following steps:
step one, adding 50-80 parts by weight of polyacrylate and 10-40 parts by weight of chlorinated polyethylene into an internal mixer for plastication to obtain premix;
step two, adding 10-40 parts of reinforcing agent, 20-35 parts of filler and 15-20 parts of plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding 1-5 parts of lubricant and 10-20 parts of flame retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 2-4 times, and placing the material on a glue placing device for 1-2 times;
placing the material obtained in the fourth step for 1-3h, feeding the material into an internal mixer, and adding 3-8 parts of vulcanizing agent, 0.5-2.5 parts of co-vulcanizing agent and 3-8 parts of vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 2-4 times, placing the material on a glue swinging device for 4-6 times, and feeding the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
Furthermore, in the first step, the plastication temperature is 50-70 ℃, and the plastication time is 2-5 min; in the second step, the mixing temperature is 75-80 ℃, and the mixing time is 2-4 min; in the third step, the mixing temperature is 80-90 ℃, and the mixing time is 4-6 min; in the fifth step, the mixing temperature is 100-; in the seventh step, the vulcanization temperature is 160-170 ℃, the vulcanization time is 1-3min, and the vulcanization pressure is 12-18 MPa.
Furthermore, in the first step, the plastication temperature is 55-65 ℃, and the plastication time is 3-4 min; in the second step, the mixing temperature is 75-80 ℃, and the mixing time is 3-4 min; in the third step, the mixing temperature is 85-90 ℃, and the mixing time is 5-6 min; in the fifth step, the mixing temperature is 105-; in the seventh step, the vulcanization temperature is 165-170 ℃, the vulcanization time is 1-2min, and the vulcanization pressure is 14-16 MPa.
Further, the chlorinated polyethylene has a chlorine content of 30-50%.
The chlorine content of the chlorinated polyethylene determines the flame retardant property of the chlorinated polyethylene, the flame retardant property of the chlorinated polyethylene is improved along with the increase of the chlorine content, but the compression bending resistance is reduced, and the chlorine content of 30-50% can meet the use requirement.
According to the preferable technical scheme, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene.
The di-tert-butylperoxyisopropyl benzene and triallyl isocyanurate have synergistic effect, so that the vulcanization time of the chlorinated polyethylene rubber can be shortened, the vulcanization is more sufficient, the good physical and mechanical properties of the chlorinated polyethylene rubber are ensured, and meanwhile, the di-tert-butylperoxyisopropyl benzene does not generate peculiar smell in the processing process and is more environment-friendly. The addition of 1, 2-polybutadiene can obviously improve the vulcanization performance of a vulcanizing agent and reduce the Mooney viscosity of rubber.
According to the preferable technical scheme, the filler is white lubricating powder, fumed silica or superfine talcum powder.
The filler can improve the heat resistance of the insulating sheath.
In a preferred technical scheme, the flame retardant is aluminum hydroxide or antimony trioxide.
The flame retardant and the filler have synergistic effect, so that the flame retardance of the insulating sleeve is improved.
In a preferred technical scheme, the plasticizer is a mixture of chlorinated paraffin and epoxy resin.
The plasticizing system of chlorinated paraffin and epoxy resin can delay the generation of free radicals and reduce the vulcanization efficiency of organic peroxide, the chlorinated paraffin has flame retardant property, and the epoxy resin can improve the thermal stability of the rubber material.
In a preferred embodiment, the lubricant is a metal salt of a hard acid.
The hard metal salt lubricant can reduce heat generation in the colloid generation process, and has a lubricating effect.
In a preferred technical scheme, the reinforcing agent is gas-mixed carbon black or semi-reinforcing carbon black.
The gas-mixed carbon black or semi-reinforcing carbon black is alkaline and has small frictional heat generation in the production process.
According to the preparation method of the high-temperature-resistant cable sheath, a mixture of polyacrylate and chlorinated polyethylene is used as a main body framework material, the polyacrylate has excellent cold resistance, heat resistance and oil resistance, but the processing technology of the polyacrylate is poor, the chlorinated polyethylene and the polyacrylate are mixed, the mechanical property and the heat resistance of a sizing material are improved, and the flame retardant, the heat insulation and the tensile resistance of the sizing material are improved by adding a vulcanizing agent, a co-vulcanizing agent, a vulcanization accelerator, a filling agent, a flame retardant, a plasticizer, a lubricant and a reinforcing agent into the main body framework material, so that the high-temperature-resistant cable sheath can be normally used in a working environment with complex working conditions.
Detailed Description
Example 1
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 70kg of polyacrylate, 30kg of chlorinated polyethylene, 6kg of vulcanizing agent, 2kg of co-vulcanizing agent, 6kg of vulcanization accelerator, 28kg of filler, 20kg of flame retardant, 18kg of plasticizer, 3kg of lubricant and 25kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is white smooth powder. The flame retardant is aluminum hydroxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is gas-mixed carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 50 ℃, and the plastication time is 5 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 80 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 100 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 160 ℃, the vulcanization time is 3min, and the vulcanization pressure is 12 MPa.
Example 2
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 60kg of polyacrylate, 30kg of chlorinated polyethylene, 4kg of vulcanizing agent, 2kg of co-vulcanizing agent, 4kg of vulcanization accelerator, 30kg of filler, 15kg of flame retardant, 20kg of plasticizer, 2kg of lubricant and 30kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 30%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is fumed silica. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 50 ℃, and the plastication time is 5 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 80 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 100 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 160 ℃, the vulcanization time is 3min, and the vulcanization pressure is 12 MPa.
Example 3
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 70kg of polyacrylate, 20kg of chlorinated polyethylene, 7kg of vulcanizing agent, 1kg of co-vulcanizing agent, 7kg of vulcanization accelerator, 25kg of filler, 20kg of flame retardant, 18kg of plasticizer, 4kg of lubricant and 20kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 50%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is fumed silica. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 50 ℃, and the plastication time is 5 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 80 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 100 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 160 ℃, the vulcanization time is 3min, and the vulcanization pressure is 12 MPa.
Example 4
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 50kg of polyacrylate, 40kg of chlorinated polyethylene, 3kg of vulcanizing agent, 2.5kg of co-vulcanizing agent, 3kg of vulcanization accelerator, 35kg of filler, 10kg of flame retardant, 20kg of plasticizer, 1kg of lubricant and 40kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is superfine talcum powder. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 50 ℃, and the plastication time is 5 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 80 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 100 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 160 ℃, the vulcanization time is 3min, and the vulcanization pressure is 12 MPa.
Example 5
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 50-80 parts of polyacrylate, 10-40 parts of chlorinated polyethylene, 3-8 parts of a vulcanizing agent, 0.5-2.5 parts of a co-vulcanizing agent, 3-8 parts of a vulcanization accelerator, 20-35 parts of a filler, 10-20 parts of a flame retardant, 15-20 parts of a plasticizer, 1-5 parts of a lubricant and 10-40 parts of a reinforcing agent.
Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is superfine talcum powder. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 50 ℃, and the plastication time is 5 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 80 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 100 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 160 ℃, the vulcanization time is 3min, and the vulcanization pressure is 12 MPa.
Example 6
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 50kg of polyacrylate, 40kg of chlorinated polyethylene, 3kg of vulcanizing agent, 2.5kg of co-vulcanizing agent, 3kg of vulcanization accelerator, 35kg of filler, 10kg of flame retardant, 20kg of plasticizer, 1kg of lubricant and 40kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is superfine talcum powder. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 2 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 3 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 4 times, placing the material on a glue swinging device, swinging glue for 6 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 70 ℃, and the plastication time is 2 min; in the second step, the mixing temperature is 80 ℃, and the mixing time is 2 min; in the third step, the mixing temperature is 90 ℃, and the mixing time is 4 min; in the fifth step, the mixing temperature is 110 ℃, and the mixing time is 1 min; in the seventh step, the vulcanization temperature is 170 ℃, the vulcanization time is 1min, and the vulcanization pressure is 18 MPa.
Example 7
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 50kg of polyacrylate, 40kg of chlorinated polyethylene, 3kg of vulcanizing agent, 2.5kg of co-vulcanizing agent, 3kg of vulcanization accelerator, 35kg of filler, 10kg of flame retardant, 20kg of plasticizer, 1kg of lubricant and 40kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is superfine talcum powder. The flame retardant is antimony trioxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is semi-reinforcing carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 2 times, and placing the material on a glue swinging device for 1 time;
placing the material obtained in the step four for 1h, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 2 times, placing the material on a glue swinging device, swinging glue for 4 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 60 ℃, and the plastication time is 4 min; in the second step, the mixing temperature is 77 ℃ and the mixing time is 3 min; in the third step, the mixing temperature is 85 ℃, and the mixing time is 5 min; in the fifth step, the mixing temperature is 105 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 165 ℃, the vulcanization time is 2min, and the vulcanization pressure is 15 MPa.
Example 8
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 70kg of polyacrylate, 30kg of chlorinated polyethylene, 6kg of vulcanizing agent, 2kg of co-vulcanizing agent, 6kg of vulcanization accelerator, 28kg of filler, 20kg of flame retardant, 18kg of plasticizer, 3kg of lubricant and 25kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is white smooth powder. The flame retardant is aluminum hydroxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is gas-mixed carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 55 ℃, and the plastication time is 4 min; in the second step, the mixing temperature is 75 ℃, and the mixing time is 4 min; in the third step, the mixing temperature is 85 ℃, and the mixing time is 6 min; in the fifth step, the mixing temperature is 105 ℃, and the mixing time is 1.5 min; in the seventh step, the vulcanization temperature is 165 ℃, the vulcanization time is 2min, and the vulcanization pressure is 14 MPa.
Example 9
A high-temperature-resistant cable sheath comprises the following components in parts by weight: 70kg of polyacrylate, 30kg of chlorinated polyethylene, 6kg of vulcanizing agent, 2kg of co-vulcanizing agent, 6kg of vulcanization accelerator, 28kg of filler, 20kg of flame retardant, 18kg of plasticizer, 3kg of lubricant and 25kg of reinforcing agent. Wherein, the chlorine content of the chlorinated polyethylene is 40%, the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene. The filler is white smooth powder. The flame retardant is aluminum hydroxide. The plasticizer is a mixture of chlorinated paraffin and epoxy resin. The lubricant is a metal salt of a hard acid. The reinforcing agent is gas-mixed carbon black.
The preparation method of the high-temperature-resistant cable sheath comprises the following steps:
step one, adding polyacrylate and chlorinated polyethylene into an internal mixer according to parts by weight for plastication to obtain premix;
step two, adding a reinforcing agent, a filling agent and a plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding a lubricant and a fire retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 3 times, and placing the material on a glue swinging device for 2 times;
placing the material obtained in the step four for 2 hours, feeding the material into an internal mixer, and adding a vulcanizing agent, a co-vulcanizing agent and a vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 3 times, placing the material on a glue swinging device, swinging the glue for 5 times, and sending the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
In the first step, the plastication temperature is 65 ℃, and the plastication time is 3 min; in the second step, the mixing temperature is 80 ℃, and the mixing time is 3 min; in the third step, the mixing temperature is 90 ℃, and the mixing time is 5 min; in the fifth step, the mixing temperature is 110 ℃, and the mixing time is 1 min; in the seventh step, the vulcanization temperature is 170 ℃, the vulcanization time is 1min, and the vulcanization pressure is 116 MPa.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. The preparation method of the high-temperature-resistant cable sheath is characterized by comprising the following steps of:
step one, adding 50-80 parts by weight of polyacrylate and 10-40 parts by weight of chlorinated polyethylene into an internal mixer for plastication to obtain premix;
step two, adding 10-40 parts of reinforcing agent, 20-35 parts of filler and 15-20 parts of plasticizer into the premix obtained in the step one, and mixing in an internal mixer;
step three, adding 1-5 parts of lubricant and 10-20 parts of flame retardant into the material obtained in the step two, and mixing in an internal mixer;
step four, thinly passing the material obtained in the step three in an open mill for 2-4 times, and placing the material on a glue placing device for 1-2 times;
placing the material obtained in the fourth step for 1-3h, feeding the material into an internal mixer, and adding 3-8 parts of vulcanizing agent, 0.5-2.5 parts of co-vulcanizing agent and 3-8 parts of vulcanization accelerator for mixing;
step six, thinly passing the material obtained in the step five in an open mill for 2-4 times, placing the material on a glue swinging device for 4-6 times, and feeding the material into a calender for compression molding;
and step seven, feeding the materials obtained in the step six into a vulcanizing machine for vulcanization.
2. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: in the first step, the plastication temperature is 50-70 ℃, and the plastication time is 2-5 min; in the second step, the mixing temperature is 75-80 ℃, and the mixing time is 2-4 min; in the third step, the mixing temperature is 80-90 ℃, and the mixing time is 4-6 min; in the fifth step, the mixing temperature is 100-; in the seventh step, the vulcanization temperature is 160-170 ℃, the vulcanization time is 1-3min, and the vulcanization pressure is 12-18 MPa.
3. The method for preparing a high temperature-resistant cable sheath according to claim 2, wherein: in the first step, the plastication temperature is 55-65 ℃, and the plastication time is 3-4 min; in the second step, the mixing temperature is 75-80 ℃, and the mixing time is 3-4 min; in the third step, the mixing temperature is 85-90 ℃, and the mixing time is 5-6 min; in the fifth step, the mixing temperature is 105-; in the seventh step, the vulcanization temperature is 165-170 ℃, the vulcanization time is 1-2min, and the vulcanization pressure is 14-16 MPa.
4. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the chlorine content of the chlorinated polyethylene is 30-50%.
5. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the vulcanizing agent is bis-tert-butylperoxyisopropyl benzene, the co-vulcanizing agent is triallyl isocyanurate, and the vulcanization accelerator is 1, 2-polybutadiene.
6. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the filler is white lubricating powder, fumed silica or superfine talcum powder.
7. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the flame retardant is aluminum hydroxide or antimony trioxide.
8. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the plasticizer is a mixture of chlorinated paraffin and epoxy resin.
9. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the lubricant is a metal salt of a hard acid.
10. The method for preparing a high temperature-resistant cable sheath according to claim 1, wherein: the reinforcing agent is mixed carbon black or semi-reinforcing carbon black.
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| CN113801421A (en) * | 2021-09-23 | 2021-12-17 | 江西立德汽车零部件有限公司 | Preparation process of rubber sheath |
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