CN112574518B - Ultraviolet irradiation crosslinked chlorinated polyethylene cable material and preparation method thereof - Google Patents
Ultraviolet irradiation crosslinked chlorinated polyethylene cable material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or compounds containing halogen
- C08L23/286—Chlorinated polyethylene
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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
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/06—Crosslinking by radiation
Abstract
The invention discloses an ultraviolet irradiation crosslinked chlorinated polyethylene cable material and a preparation method thereof, wherein the cable material comprises the following raw material components in parts by weight: 80-100 parts of chlorinated polyethylene, 20-40 parts of ethylene-octene copolymer, 3-15 parts of plasticizer, 10-30 parts of flame retardant, 5-10 parts of stabilizer, 0.5-2 parts of antioxidant, 1-5 parts of lubricant, 0.3-3.5 parts of photoinitiator and 0.8-3.2 parts of polyfunctional group crosslinking agent. The cable material is prepared by adopting an ultraviolet irradiation crosslinking mode, so that the energy consumption is low, the environment is protected, the material can be crosslinked on line after being extruded, the working procedures are reduced in the production process, the chlorinated polyethylene has excellent mechanical property, flame retardant property and heat resistance after being crosslinked by ultraviolet light, the actual industrial production requirement can be met, and all properties of the cable material can meet the requirements of IE4 type in GB/T5013-.
Description
Technical Field
The invention relates to the technical field of cable insulation materials, in particular to an ultraviolet irradiation crosslinked chlorinated polyethylene cable material and a preparation method thereof.
Background
Chlorinated Polyethylene (CPE) is a new thermoplastic elastomer material prepared by taking polyethylene as a raw material through chlorination reaction, has excellent ozone resistance, ultraviolet resistance, high wear resistance, excellent low-temperature performance, lower Mooney viscosity, excellent processing performance and excellent mechanical performance, and is widely applied to the field of wires and cables, and comprises the following components: the cable comprises various wires for electric equipment, sheaths of wind energy cables, mining cables and marine cables, insulating layers or sheaths of various instruments and control cables and the like.
At present, chlorinated polyethylene crosslinking modes mainly comprise vulcanization crosslinking, electron accelerator irradiation crosslinking and the like. Vulcanization crosslinking has a number of drawbacks: if a sulfur connecting pipe with the length of hundreds of meters is needed, the production energy consumption is high, the speed is low, the scorching phenomenon is easy to occur in the production process, and the discharged waste gas pollutes the environment. The irradiation crosslinking electron accelerator has the advantages of higher equipment price, large occupied area, high maintenance cost and radiation generation, and is not beneficial to environmental protection.
In recent years, the ultraviolet crosslinking technology gets more and more attention, the use method is simple, the energy consumption is low, the high-speed online crosslinking can be realized, and the production cost and the maintenance cost are low.
Disclosure of Invention
In order to solve the problems, the invention provides an ultraviolet irradiation crosslinking chlorinated polyethylene cable material and a preparation method thereof.
The invention adopts the following technical scheme:
an ultraviolet irradiation crosslinked chlorinated polyethylene cable material is prepared from the following raw materials in parts by weight: 80-100 parts of chlorinated polyethylene, 20-40 parts of ethylene-octene copolymer, 3-15 parts of plasticizer, 10-30 parts of flame retardant, 5-10 parts of stabilizer, 0.5-2 parts of antioxidant, 1-5 parts of lubricant, 0.3-3.5 parts of photoinitiator and 0.8-3.2 parts of polyfunctional group crosslinking agent.
The chlorinated polyethylene is one or the combination of two of rubber type chlorinated polyethylene, and the Mooney viscosity (ML121 ℃ 1+4) is 50-90.
The number average molecular weight of the ethylene-octene copolymer is 8-20 ten thousand, and the melt index of the ethylene-octene copolymer at 190 ℃ and under the condition of 2.16kg is 0.3-15.5g/10 min.
The plasticizer is one or a combination of more of dibutyl phthalate, dioctyl phthalate, epoxidized soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate and chlorinated paraffin.
The flame retardant is compounded by two or more of halogen flame retardant, phosphorus flame retardant, intumescent flame retardant and inorganic flame retardant.
The stabilizer is one or more of calcium-zinc composite stabilizer, organic tin stabilizer and rare earth stabilizer.
The antioxidant is one or more of hindered phenol antioxidant, phosphite antioxidant and thioester antioxidant.
The lubricant is one or a combination of silicone master batch, polyethylene wax and ethylene bis stearamide.
The polyfunctional group crosslinking agent is one or a combination of more of triallyl isocyanurate, tris (2-hydroxyethyl) isocyanurate triacrylate, triallyl cyanurate, propoxylated neopentyl glycol diacrylate, propane trimethanol triacrylate and dipentaerythritol hexaacrylate.
The photoinitiator is a special photoinitiator for the LED, and is one or a combination of more of benzophenone and derivatives thereof, oxime esters, triazines, benzoin and derivatives thereof, acyl phosphine oxide, thioxanthone and macromolecular thioxanthone photoinitiators.
A preparation method of an ultraviolet irradiation crosslinked chlorinated polyethylene cable material comprises the following steps:
s1, mixing the raw material components weighed according to the formula weight, and then putting the mixture into an internal mixer for melt blending to obtain a mixture;
s2, adding the mixture into a double-screw extruder, and extruding to prepare particles to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder to be extruded into strands;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking to obtain the ultraviolet irradiation crosslinked chlorinated polyethylene cable material.
The parameters of melt blending in the internal mixer in the step S1 are as follows: the banburying temperature is 160 ℃ and 180 ℃, and the banburying time is 15-20 minutes.
In the step S2, the mixture passes through eight zones in the twin-screw extruder, and the working temperature of each zone is as follows: the first zone is 100-.
In step S3, the pellets pass through four zones in the single screw extruder, and the operating temperature of each zone is: the first zone is 100-.
In the step S3, the extrusion speed of the wire rod is more than 200 m/min; and in the step S4, the wire crosslinking speed is more than 200 m/min.
The technical scheme of the invention has the following advantages:
A. according to the invention, a large amount of formula screening is carried out to obtain the ultraviolet irradiation crosslinking chlorinated polyethylene cable material, the material adopts the matching of a small molecular initiator and a hydrogen abstraction type large molecular initiator, the excited state hydrogen abstraction process of the large molecular initiator can be completed in molecules, the initiation efficiency is greatly improved, in addition, the compatibility of the large molecular initiator and the chlorinated polyethylene is good, the crosslinked chlorinated polyethylene cable material does not migrate and is not easy to volatilize, and the smell is reduced.
B. According to the invention, chlorinated polyethylene is used as a preparation raw material, so that the prepared polyvinyl chloride cable material has better weather resistance, corrosion resistance, safety, environmental protection performance, oil resistance and flame retardance. In addition, the chlorinated polyethylene contains chlorine element, has excellent flame retardant performance and has the characteristics of combustion and dripping prevention. And the flame retardant is matched with a flame retardant, so that a better flame retardant synergistic effect is achieved. The added plasticizer can enhance the flexibility of the polyvinyl chloride cable material, so that the polyvinyl chloride cable material is easier to bend and fold and has better elasticity.
C. The addition of the stabilizer can improve the stability of the chlorinated polyethylene to heat and light. For example, the calcium-zinc composite stabilizer is synthesized by taking calcium salt, zinc salt, lubricant, antioxidant and the like as main components by adopting a special composite process, has very good thermal stability, light stability, transparency and tinting strength, has no precipitation phenomenon, and has very good compatibility with chlorinated polyethylene, so that the chlorinated polyethylene cable material has higher stability, and the plasticizer is not easy to precipitate. For another example, the organic tin stabilizer and the rare earth stabilizer can ensure that the stability of the chlorinated polyethylene cable material is higher.
D. The cable material is prepared by adopting an ultraviolet irradiation crosslinking mode, the energy consumption is low, the environment is protected, the material can be crosslinked on line after being extruded, the working procedures are reduced in the production process, the chlorinated polyethylene has excellent mechanical property, flame retardant property and heat resistance after being crosslinked by ultraviolet light, the actual industrial production requirements can be met, the extrusion speed and the crosslinking speed of the material are more than 200 m/min, and all properties of the cable material can meet the requirements of IE4 type in GB/T5013 + 2008.
Detailed Description
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. 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.
The chlorinated polyethylene adopted in the embodiment of the invention is one or the combination of two of rubber type chlorinated polyethylene, the Mooney viscosity (ML121 ℃ 1+4) is 50-90, the number average molecular weight of the ethylene-octene copolymer is 8-20 ten thousand, and the melt index is 0.3-15.5g/10min under the conditions of 190 ℃ and 2.16 kg.
Table 1 formula of ultraviolet radiation crosslinked chlorinated polyethylene cable material of examples 1-4
Example 1:
the ultraviolet irradiation crosslinked chlorinated polyethylene cable material comprises the following raw materials in parts by weight shown in table 1, wherein the flame retardant is prepared by compounding a halogen flame retardant and a phosphorus flame retardant, the stabilizer is a calcium-zinc composite stabilizer, the plasticizer is dibutyl phthalate, the antioxidant A is a hindered phenol antioxidant, the antioxidant B is a phosphite antioxidant, the lubricant is silicone master batch, the photoinitiator A is benzophenone and derivatives thereof, the macromolecular photoinitiator B is a macromolecular thioxanthone photoinitiator, the polyfunctional group crosslinking agent A is triallyl isocyanurate, and the polyfunctional group crosslinking agent B is tris (2-hydroxyethyl) isocyanurate triacrylate.
The preparation method comprises the following steps:
s1, mixing the raw material components weighed according to the formula weight, and putting the mixture into an internal mixer for melt blending, wherein the internal mixing temperature is 160-180 ℃, and the internal mixing time is 15-20 minutes, so as to obtain a mixture;
s2, adding the mixture into a double-screw extruder, wherein the mixture passes through eight zones in the double-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into particles at 100 ℃ in a first zone, 120 ℃ in a second zone, 125 ℃ in a third zone, 130 ℃ in a fourth zone, 140 ℃ in a fifth zone, 145 ℃ in a sixth zone, 150 ℃ in a seventh zone and 160 ℃ in an eighth zone to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder, wherein the granules pass through four zones in the single-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into a wire at the temperature of 100 ℃ in the first area, 120 ℃ in the second area, 130 ℃ in the third area and 140 ℃ in the fourth area, wherein the extrusion speed of the wire is more than 200 m/min;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking, wherein the crosslinking speed of the wire is more than 200 m/min, and obtaining the ultraviolet irradiation crosslinking chlorinated polyethylene cable material.
Example 2:
the ultraviolet light irradiation crosslinking chlorinated polyethylene cable material comprises the following raw material components in parts by weight shown in table 1, wherein a flame retardant is prepared by compounding a phosphorus flame retardant and an intumescent flame retardant, the stabilizer is an organic tin stabilizer, the plasticizer is dioctyl sebacate, the antioxidant A is a phosphite antioxidant, the antioxidant B is a phosphite antioxidant, the lubricant is ethylene bis stearamide, the photoinitiator A is benzoin and derivatives thereof, the photoinitiator C is thioxanthone, the polyfunctional group crosslinking agent A is triallyl cyanurate, and the polyfunctional group crosslinking agent B is propoxylated neopentyl glycol diacrylate.
The preparation method comprises the following steps:
s1, mixing the raw material components weighed according to the formula weight, and putting the mixture into an internal mixer for melt blending, wherein the internal mixing temperature is 160-180 ℃, and the internal mixing time is 15-20 minutes, so as to obtain a mixture;
s2, adding the mixture into a double-screw extruder, wherein the mixture passes through eight zones in the double-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into particles in a first zone at 105 ℃, a second zone at 120 ℃, a third zone at 125 ℃, a fourth zone at 130 ℃, a fifth zone at 135 ℃, a sixth zone at 140 ℃, a seventh zone at 150 ℃ and an eighth zone at 150 ℃ to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder, wherein the granules pass through four zones in the single-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into a wire at the temperature of 110 ℃, 120 ℃ in a first area, 140 ℃ in a third area and 150 ℃ in a fourth area, wherein the extrusion speed of the wire is more than 200 m/min;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking, wherein the crosslinking speed of the wire is more than 200 m/min, and obtaining the ultraviolet irradiation crosslinking chlorinated polyethylene cable material.
Example 3:
the ultraviolet light irradiation crosslinking chlorinated polyethylene cable material comprises the following raw material components in parts by weight shown in table 1, wherein the flame retardant is prepared by compounding a halogen flame retardant, a phosphorus flame retardant and an inorganic flame retardant, the stabilizers are an organic tin stabilizer and a rare earth stabilizer, the plasticizer is epoxidized soybean oil, the antioxidant A is a hindered phenol antioxidant, the antioxidant B is a thioester antioxidant, the lubricant is ethylene bis-stearamide, the photoinitiator A is a triazine initiator, the macromolecular photoinitiator B is a macromolecular thioxanthone photoinitiator, the polyfunctional group crosslinking agent A is propane trimethanol triacrylate, and the polyfunctional group crosslinking agent B is dipentaerythritol hexaacrylate.
The preparation method comprises the following steps:
s1, mixing the raw material components weighed according to the formula weight, and putting the mixture into an internal mixer for melt blending, wherein the internal mixing temperature is 160-180 ℃, and the internal mixing time is 15-20 minutes, so as to obtain a mixture;
s2, adding the mixture into a double-screw extruder, wherein the mixture passes through eight zones in the double-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into particles at 100 ℃ in a first zone, 120 ℃ in a second zone, 130 ℃ in a third zone, 140 ℃ in a fourth zone, 140 ℃ in a fifth zone, 145 ℃ in a sixth zone, 150 ℃ in a seventh zone and 160 ℃ in an eighth zone to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder, wherein the granules pass through four zones in the single-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into a wire at 105 ℃ in a first area, 125 ℃ in a second area, 135 ℃ in a third area and 150 ℃ in a fourth area, wherein the extrusion speed of the wire is more than 200 m/min;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking, wherein the crosslinking speed of the wire is more than 200 m/min, and obtaining the ultraviolet irradiation crosslinking chlorinated polyethylene cable material.
Example 4:
the ultraviolet light irradiation crosslinking chlorinated polyethylene cable material comprises the following raw material components in parts by weight shown in table 1, wherein the flame retardant is prepared by compounding a halogen flame retardant, a phosphorus flame retardant and an intumescent flame retardant, the stabilizer is a rare earth stabilizer, the plasticizer is triphenyl phosphate and dioctyl sebacate, the antioxidant A is a hindered phenol antioxidant, the antioxidant B is a phosphite antioxidant, the lubricant is polyethylene wax and ethylene bis stearamide, the photoinitiator A is benzophenone and derivatives thereof, the macromolecular photoinitiator B is a macromolecular thioxanthone photoinitiator, the photoinitiator C is an acylphosphine oxide, the polyfunctional group crosslinking agent A is propane trimethanol triacrylate, and the polyfunctional group crosslinking agent B is triallyl cyanurate.
The preparation method comprises the following steps:
s1, mixing the raw material components weighed according to the formula weight, and putting the mixture into an internal mixer for melt blending, wherein the internal mixing temperature is 160-180 ℃, and the internal mixing time is 15-20 minutes, so as to obtain a mixture;
s2, adding the mixture into a double-screw extruder, wherein the mixture passes through eight zones in the double-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into particles in a first zone at 110 ℃, a second zone at 125 ℃, a third zone at 130 ℃, a fourth zone at 130 ℃, a fifth zone at 135 ℃, a sixth zone at 140 ℃, a seventh zone at 145 ℃ and an eighth zone at 150 ℃ to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder, wherein the granules pass through four zones in the single-screw extruder, and the working temperature of each zone is as follows: extruding the mixture into a wire at the temperature of 100 ℃ in the first area, 130 ℃ in the second area, 135 ℃ in the third area and 140 ℃ in the fourth area, wherein the extrusion speed of the wire is more than 200 m/min;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking, wherein the crosslinking speed of the wire is more than 200 m/min, and obtaining the ultraviolet irradiation crosslinking chlorinated polyethylene cable material.
And (3) performance testing:
the ultraviolet radiation crosslinked chlorinated polyethylene cable materials prepared in examples 1 to 4 were subjected to performance tests according to the corresponding test standards, and the test results are shown in table 2.
As can be seen from the performance test results of the ultraviolet light irradiation crosslinked chlorinated polyethylene cable materials prepared in the embodiments 1 to 4, all the performances meet the requirements of the IE4 type in GB/T5013-.
According to the invention, a large amount of formula screening is carried out to obtain the ultraviolet irradiation crosslinking chlorinated polyethylene cable material, the material adopts the matching of a small molecular initiator and a hydrogen abstraction type large molecular initiator, the excited state hydrogen abstraction process of the large molecular initiator can be completed in molecules, the initiation efficiency is greatly improved, in addition, the compatibility of the large molecular initiator and the chlorinated polyethylene is good, the crosslinked chlorinated polyethylene cable material does not migrate and is not easy to volatilize, and the smell is reduced.
According to the invention, a large amount of formula screening is carried out to obtain the ultraviolet irradiation crosslinking chlorinated polyethylene cable material, the material adopts the matching of a small molecular initiator and a hydrogen abstraction type large molecular initiator, the excited state hydrogen abstraction process of the large molecular initiator can be completed in molecules, the initiation efficiency is greatly improved, in addition, the compatibility of the large molecular initiator and the chlorinated polyethylene is good, the crosslinked chlorinated polyethylene cable material does not migrate and is not easy to volatilize, and the smell is reduced.
According to the invention, chlorinated polyethylene is used as a preparation raw material, so that the prepared polyvinyl chloride cable material has better weather resistance, corrosion resistance, safety, environmental protection performance, oil resistance and flame retardance. In addition, the chlorinated polyethylene contains chlorine element, has excellent flame retardant performance and has the characteristics of combustion and dripping prevention. Has better flame-retardant synergistic effect when being matched with a flame retardant. The added plasticizer can enhance the flexibility of the polyvinyl chloride cable material, so that the polyvinyl chloride cable material is easier to bend and fold and has better elasticity.
The addition of the stabilizer can improve the stability of the chlorinated polyethylene to heat and light. For example, the calcium-zinc composite stabilizer is synthesized by taking calcium salt, zinc salt, lubricant, antioxidant and the like as main components by adopting a special composite process, has very good thermal stability, light stability, transparency and tinting strength, has no precipitation phenomenon, and has very good compatibility with chlorinated polyethylene, so that the chlorinated polyethylene cable material has higher stability, and the plasticizer is not easy to precipitate. For another example, the organic tin stabilizer and the rare earth stabilizer can ensure that the stability of the chlorinated polyethylene cable material is higher.
Compared with the prior art, the product adopts an ultraviolet irradiation crosslinking mode, has low energy consumption and environmental protection, can be crosslinked on line after the material is extruded, reduces the working procedures in the production process, has excellent mechanical property, flame retardant property and heat resistance after the chlorinated polyethylene is crosslinked by ultraviolet light, and can meet the actual industrial production requirements. The invention has simple production process, the material extrusion speed and the crosslinking speed are more than 200 m/min, the performances are excellent, the production efficiency of a cable factory can be greatly improved, and the production cost can be reduced.
The invention is applicable to the prior art.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (6)
1. The ultraviolet irradiation crosslinked chlorinated polyethylene cable material is characterized by being prepared from the following raw materials in parts by weight:
80-100 parts of chlorinated polyethylene, 20-40 parts of ethylene-octene copolymer and 3-15 parts of plasticizer
10-30 parts of flame retardant, 5-10 parts of stabilizer, 0.5-2 parts of antioxidant
1-5 parts of lubricant, 0.3-3.5 parts of photoinitiator, 0.8-3.2 parts of polyfunctional group crosslinking agent;
the chlorinated polyethylene is one or a combination of two of rubber type chlorinated polyethylene, and the Mooney viscosity ML121 ℃ 1+4 is 50-90;
the number average molecular weight of the ethylene-octene copolymer is 8-20 ten thousand, and the melt index of the ethylene-octene copolymer at 190 ℃ under the condition of 2.16kg is 0.3-15.5g/10 min;
the plasticizer is one or a combination of more of dibutyl phthalate, dioctyl phthalate, epoxidized soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate and chlorinated paraffin;
the flame retardant is compounded by two or more of halogen flame retardant, phosphorus flame retardant, intumescent flame retardant and inorganic flame retardant;
the stabilizer is one or more of calcium-zinc composite stabilizer, organic tin stabilizer and rare earth stabilizer;
the antioxidant is one or a combination of hindered phenol antioxidant, phosphite antioxidant and thioester antioxidant;
the lubricant is one or a combination of more of silicone master batch, polyethylene wax and ethylene bis stearamide;
the polyfunctional group crosslinking agent is one or a combination of more of triallyl isocyanurate, tris (2-hydroxyethyl) isocyanurate triacrylate, triallyl cyanurate, propoxylated neopentyl glycol diacrylate, propane trimethanol triacrylate and dipentaerythritol hexaacrylate; the photoinitiator is a special photoinitiator for the LED, and is one or a combination of more of benzophenone and derivatives thereof, oxime esters, triazines, benzoin and derivatives thereof, acyl phosphine oxide, thioxanthone and macromolecular thioxanthone photoinitiators.
2. The preparation method of the ultraviolet light irradiation crosslinked chlorinated polyethylene cable material according to claim 1, characterized by comprising the following steps:
s1, mixing the raw material components weighed according to the formula weight, and then putting the mixture into an internal mixer for melt blending to obtain a mixture;
s2, adding the mixture into a double-screw extruder, and extruding to prepare particles to obtain granules;
s3, adding the granules obtained in the step S2 into a single-screw extruder to be extruded into strands;
and S4, placing the wire into ultraviolet irradiation crosslinking equipment for ultraviolet irradiation crosslinking to obtain the ultraviolet irradiation crosslinked chlorinated polyethylene cable material.
3. The method according to claim 2, wherein the parameters of melt blending in an internal mixer in the step S1 are as follows: the banburying temperature is 160 ℃ and 180 ℃, and the banburying time is 15-20 minutes.
4. The method for preparing the rubber composition according to claim 3, wherein the compound material in the step S2 passes through eight zones in the twin-screw extruder, and the working temperature of each zone is as follows: the first zone is 100-.
5. The method of claim 4, wherein the pellets in step S3 pass through four zones in the single screw extruder, each zone having an operating temperature of: the first zone is 100-.
6. The method as claimed in claim 5, wherein the wire extrusion speed in the step S3 is more than 200 m/min; and in the step S4, the wire crosslinking speed is more than 200 m/min.
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| CN101942150A (en) * | 2009-07-10 | 2011-01-12 | 广东华声电器实业有限公司 | Irradiated crosslinked chlorinated polyethylene insulated rubber and preparation method thereof |
| CN103247391A (en) * | 2013-04-04 | 2013-08-14 | 山东华东线缆集团有限公司 | Fabrication process of cross-linked polyolefin insulation power cable |
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| CN110951141B (en) * | 2019-12-11 | 2021-07-02 | 上海凯波电缆特材股份有限公司 | Double-layer co-extrusion insulation LED ultraviolet light cross-linking color low-smoke halogen-free flame-retardant cable material and preparation method thereof |
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