CN116959815A - Preparation process of polyethylene insulated cable - Google Patents
Preparation process of polyethylene insulated cable Download PDFInfo
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- CN116959815A CN116959815A CN202310816241.2A CN202310816241A CN116959815A CN 116959815 A CN116959815 A CN 116959815A CN 202310816241 A CN202310816241 A CN 202310816241A CN 116959815 A CN116959815 A CN 116959815A
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- polyethylene
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- insulated cable
- master batch
- polyethylene insulated
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 137
- -1 polyethylene Polymers 0.000 title claims abstract description 137
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 137
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 38
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 38
- 239000006229 carbon black Substances 0.000 claims abstract description 34
- 239000000314 lubricant Substances 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 28
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 28
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 28
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 28
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002250 absorbent Substances 0.000 claims abstract description 15
- 230000002745 absorbent Effects 0.000 claims abstract description 15
- 239000004615 ingredient Substances 0.000 claims abstract description 13
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 claims abstract description 13
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 46
- 239000012792 core layer Substances 0.000 claims description 26
- 239000000155 melt Substances 0.000 claims description 23
- 239000010410 layer Substances 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 239000003230 hygroscopic agent Substances 0.000 claims description 11
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 3
- 230000000052 comparative effect Effects 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 239000006096 absorbing agent Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- NFMWFGXCDDYTEG-UHFFFAOYSA-N trimagnesium;diborate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]B([O-])[O-].[O-]B([O-])[O-] NFMWFGXCDDYTEG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- 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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/147—Feeding of the insulating material
-
- 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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
-
- 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
Abstract
The invention discloses a preparation process of a polyethylene insulated cable, and relates to the technical field of cables. The preparation process of the polyethylene insulated cable comprises the following process steps: firstly, determining the structure of a polyethylene insulated cable, and then mixing ingredients to prepare a polyethylene insulated master batch by high-temperature banburying, so as to prepare the polyethylene insulated cable; wherein, the ingredients of the polyethylene insulating master batch comprise low-density polyethylene, ethylene-vinyl acetate copolymer, compatibilizer maleic anhydride grafted polyethylene, fireproof material ammonium borate, carbon black master batch, moisture absorbent magnesium nitrate, antioxidant and lubricant; the polyethylene insulated cable prepared by the invention has better tensile property and flame retardance.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a preparation process of a polyethylene insulated cable.
Background
The polyethylene insulated cable is a cable suitable for the fields of power distribution networks and the like, has the incomparable advantages of the PVC insulated cable, has the advantages of simple structure, light weight, good heat resistance, strong load capacity and high mechanical strength, is suitable for the fields of power distribution networks, industrial devices or large-capacity power utilization, and is used for being fixedly laid on an alternating-current 50Hz power transmission and distribution line with rated voltage of 6 kV-35 kV, and the main function is power transmission.
In recent years, the building forms of China are increasingly complex, the electricity consumption is greatly increased, and the situation of electric fire is extremely severe. In the 80 s of the last century, electric fires in China accounted for about 15% of the total number of fires, and the third place worldwide. In recent years, the number of electric fires is greatly increased, and the first cause of the fire in the buildings in China is high and is in an ascending trend for many years, so that the electric fires are the first in the world. The loss caused by cable fires is very serious over 70%, 40% of which cause extra loss. The method has the advantages of strong concealment, high randomness and high burning speed. The smoke quantity is large and the combustion products are toxic. The fire is difficult to find in the early stage of the fire, the site is complex, the fire is not easy to put out, the gaps of the pipeline well are more, the spread of the fire is promoted, the loss is serious, the influence range is wide, and the like, so that once the fire occurs, the fire is very difficult to put out, and huge loss is caused. In order to solve the above problems, technicians have added fire-retardant materials to the sheathing compound, and in order to solve the above problems, technicians have added fire-retardant materials to the polyethylene insulation master batch, however, existing fire-retardant materials have poor compatibility in the polyethylene insulation master batch, resulting in poor tensile properties of the polyethylene insulation master batch.
Therefore, there is a need for improving the preparation process of the polyethylene insulated cable to prepare the polyethylene insulated cable with better tensile property and flame retardance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation process of a polyethylene insulated cable, which comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 110-130 ℃ according to the parts by weight of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 180-200 ℃ and continuously mixing for 1-3 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 5-15 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 140-160 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 130-150 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 2-4 mm outside the cable core layer to obtain the polyethylene insulation cable.
Further, the structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside.
Furthermore, the cable core layer adopts copper wires with the diameter of 3-5 mm.
Further, the ingredients in the step (2) comprise 60 parts of low-density polyethylene, 20-40 parts of ethylene-vinyl acetate copolymer, 12-16 parts of compatibilizer, 15-18 parts of fireproof material, 5-8 parts of carbon black master batch, 15-18 parts of moisture absorbent, 1-3 parts of antioxidant and 2-4 parts of lubricant according to weight.
Further, the low-density polyethylene has a melt index of 2 to 4g/10min at 190 ℃ under 2.16 kg.
Further, the melt index of the ethylene-vinyl acetate copolymer is 7-10 g/10min at 190 ℃ under 2.16 kg.
Further, the compatibilizer adopts maleic anhydride grafted polyethylene with grafting ratio of 0.8-1.2% and melt index of 0.3-2.0 g/10min under the conditions of 190 ℃ and 2.16 kg.
Further, the fireproof material adopts ammonium borate.
Further, the moisture absorbent adopts magnesium nitrate.
Further, the antioxidant adopts a multi-component hindered phenol antioxidant.
Further, the lubricant is polyethylene wax.
Compared with the prior art, the invention has the following beneficial effects:
the preparation process of the polyethylene insulated cable comprises the following process steps: determining the structure of a polyethylene insulated cable, preparing a polyethylene insulated master batch and preparing the polyethylene insulated cable; wherein the polyethylene insulating master batch comprises low-density polyethylene, ethylene-vinyl acetate copolymer, compatibilizer maleic anhydride grafted polyethylene, fireproof material ammonium borate, carbon black master batch, moisture absorbent magnesium nitrate, antioxidant and lubricant.
When the polyethylene insulating master batch is prepared, the fireproof material adopts ammonium borate, so that on one hand, the fireproof and flame-retardant performance of the polyethylene insulating master batch can be enhanced, and on the other hand, the ammonium borate reacts with the hygroscopic agent magnesium nitrate at high temperature to form a large amount of magnesium borate nanowires and ammonia gas in the polyethylene insulating master batch, so that the tensile property of the polyethylene insulating master batch is enhanced; meanwhile, maleic anhydride in the compatibilizer maleic anhydride grafted polyethylene can quickly capture ammonia gas for polymerization to form a polyimide ethylene crosslinked network, so that the tensile strength of the polyethylene insulating master batch is further enhanced.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to more clearly illustrate the method provided by the invention, the following examples are used for describing the detailed description, and the method for testing each index of the polyethylene insulated cable prepared in the following examples is as follows:
tensile properties: the tensile strength of the polyethylene insulated cables prepared by the examples and the comparative examples with the same length and width was measured according to GB/T1040 standard.
Flame retardancy: the polyethylene insulated cables prepared by the examples and the comparative examples with the same quality are tested for flame retardance according to the GB/T2406.2 standard test polar oxygen index.
Example 1
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 110 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 180 ℃ and continuously mixing for 1h, adding an antioxidant and a lubricant into the internal mixer and mixing for 5min to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 140 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 130 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 2mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 12 parts of compatibilizer, 15 parts of fireproof material, 5 parts of carbon black master batch, 15 parts of moisture absorbent, 1 part of antioxidant and 2 parts of lubricant.
The melt index of the low density polyethylene is 2g/10min at 190 ℃ under 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer at 190 ℃ and 2.16kg is 7g/10min.
The compatibilizer adopts maleic anhydride grafted polyethylene with grafting rate of 0.8 percent and melt index of 0.3g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with carbon black content of 30 percent.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 3 mm.
Example 2
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 120 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 190 ℃ and continuously mixing for 2 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 10 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 150 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 140 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 3mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 14 parts of compatibilizer, 16 parts of fireproof material, 6 parts of carbon black master batch, 17 parts of moisture absorber, 2 parts of antioxidant and 3 parts of lubricant.
The melt index of the low density polyethylene is 3g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 8g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts maleic anhydride grafted polyethylene with the grafting rate of 1 percent and the melt index of 1.1g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with 40% of carbon black content.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 4 mm.
Example 3
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 130 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 200 ℃ and continuously mixing for 3 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 15 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 160 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 150 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 4mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 40 parts of ethylene-vinyl acetate copolymer, 16 parts of compatibilizer, 18 parts of fireproof material, 8 parts of carbon black master batch, 18 parts of moisture absorbent, 3 parts of antioxidant and 4 parts of lubricant.
The melt index of the low density polyethylene is 4g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 10g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts maleic anhydride grafted polyethylene with the grafting rate of 1.2 percent and the melt index of 2.0g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with the carbon black content of 50 percent.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 5 mm.
Comparative example 1
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 120 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 140 ℃ and continuously mixing for 10min, adding an antioxidant and a lubricant into the internal mixer and mixing for 10min to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 150 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 140 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 3mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 14 parts of compatibilizer, 16 parts of fireproof material, 6 parts of carbon black master batch, 17 parts of moisture absorber, 2 parts of antioxidant and 3 parts of lubricant.
The melt index of the low density polyethylene is 3g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 8g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts maleic anhydride grafted polyethylene with the grafting rate of 1 percent and the melt index of 1.1g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with 40% of carbon black content.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 4 mm.
Comparative example 2
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 120 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 190 ℃ and continuously mixing for 2 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 10 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 150 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 140 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 3mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 14 parts of compatibilizer, 16 parts of fireproof material, 6 parts of carbon black master batch, 17 parts of moisture absorber, 2 parts of antioxidant and 3 parts of lubricant.
The melt index of the low density polyethylene is 3g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 8g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts maleic anhydride grafted polyethylene with the grafting rate of 1 percent and the melt index of 1.1g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with 40% of carbon black content.
The moisture absorbent adopts calcium chloride.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 4 mm.
Comparative example 3
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 120 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 190 ℃ and continuously mixing for 2 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 10 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 150 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 140 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 3mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 14 parts of compatibilizer, 16 parts of fireproof material, 6 parts of carbon black master batch, 17 parts of moisture absorber, 2 parts of antioxidant and 3 parts of lubricant.
The melt index of the low density polyethylene is 3g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 8g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts maleic anhydride grafted polyethylene with the grafting rate of 1 percent and the melt index of 1.1g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts aluminum hydroxide.
The carbon black master batch is polyethylene with 40% of carbon black content.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 4 mm.
Comparative example 4
The preparation process of the polyethylene insulated cable comprises the following process steps:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 120 ℃ according to the parts of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 190 ℃ and continuously mixing for 2 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 10 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 150 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 140 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 3mm outside the cable core layer to obtain the polyethylene insulation cable.
The structure of the polyethylene insulated cable sequentially comprises a cable core layer and a polyethylene insulating layer from inside to outside;
the polyethylene insulation master batch comprises, by weight, 60 parts of low-density polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 14 parts of compatibilizer, 16 parts of fireproof material, 6 parts of carbon black master batch, 17 parts of moisture absorber, 2 parts of antioxidant and 3 parts of lubricant.
The melt index of the low density polyethylene is 3g/10min at 190 ℃ and 2.16 kg.
The melt index of the ethylene-vinyl acetate copolymer is 8g/10min at 190 ℃ under 2.16 kg.
The compatibilizer adopts acrylic acid grafted polyethylene with the grafting rate of 1 percent and the melt index of 1.1g/10min under the conditions of 190 ℃ and 2.16 kg.
The fireproof material adopts ammonium borate.
The carbon black master batch is polyethylene with 40% of carbon black content.
The moisture absorbent adopts magnesium nitrate.
The antioxidant adopts a multi-component hindered phenol antioxidant.
The lubricant adopts polyethylene wax.
The cable core layer adopts copper wires with the diameter of 4 mm.
Effect example
The following table 1 shows the analysis results of tensile properties and flame resistance of the polyethylene insulated cables prepared by using examples 1 to 3 of the present invention and comparative examples 1 to 4.
TABLE 1
From Table 1, it can be found that the polyethylene insulated cables prepared in examples 1, 2 and 3 have better tensile resistance and flame retardance; from the comparison of experimental data of examples 1, 2 and 3 and comparative examples 1, 2 and 3, it can be found that the prepared polyethylene insulated cable has better tensile property and flame retardance by mixing and granulating the fireproof material ammonium borate and the absorbent magnesium nitrate at high temperature; from comparison of experimental data of examples 1, 2, 3 and comparative example 4, it can be found that the compatibilizer adopts maleic anhydride grafted polyethylene to prepare polyethylene insulated cable, and the prepared polyethylene insulated cable has better tensile property.
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 characteristics 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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The preparation process of the polyethylene insulated cable is characterized by comprising the following process steps of:
(1) Determining the structure of a polyethylene insulated cable;
(2) Adding low-density polyethylene, ethylene-vinyl acetate copolymer and compatibilizer into an internal mixer with the temperature of 110-130 ℃ according to the parts by weight of the ingredients, melting and mixing, observing that the mixture is fully mixed and melted, adding a fireproof material, a carbon black master batch and a hygroscopic agent, heating to 180-200 ℃ and continuously mixing for 1-3 hours, adding an antioxidant and a lubricant into the internal mixer and mixing for 5-15 minutes to ensure that the materials are melted, adding into a double-screw extruder, extruding and granulating at the temperature of 140-160 ℃, and air-cooling to prepare the polyethylene insulation master batch;
(3) And controlling the temperature of a melting section of the extruder at 130-150 ℃, adding the polyethylene insulation master batch into the extruder, and extruding a polyethylene insulation layer with the thickness of 2-4 mm outside the cable core layer to obtain the polyethylene insulation cable.
2. The process for preparing the polyethylene insulated cable according to claim 1, wherein the structure of the polyethylene insulated cable comprises a cable core layer and a polyethylene insulating layer from inside to outside.
3. The process for preparing the polyethylene insulated cable according to claim 1, wherein the ingredients in the step (2) comprise, by weight, 60 parts of low-density polyethylene, 20-40 parts of ethylene-vinyl acetate copolymer, 12-16 parts of compatibilizer, 15-18 parts of fireproof material, 5-8 parts of carbon black master batch, 15-18 parts of moisture absorbent, 1-3 parts of antioxidant and 2-4 parts of lubricant.
4. A process for preparing a polyethylene insulated cable according to claim 3, wherein the compatibilizer is maleic anhydride grafted polyethylene with a grafting ratio of 0.8-1.2% and a melt index of 0.3-2.0 g/10min at 190 ℃ under 2.16 kg.
5. A process for the preparation of a polyethylene insulated cable according to claim 3, wherein the fire-retardant material is ammonium borate.
6. A process for the preparation of a polyethylene insulated cable according to claim 3, wherein the hygroscopic agent is magnesium nitrate.
7. A process for the preparation of a polyethylene insulated cable according to claim 3, wherein the antioxidant is a polyhydric hindered phenol antioxidant.
8. A process for the preparation of a polyethylene insulated cable according to claim 3, wherein the lubricant is polyethylene wax.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044758A (en) * | 2012-12-21 | 2013-04-17 | 上海至正道化高分子材料有限公司 | Thermoplastic water-resistant low-smoke halogen-free flame retardant cable material and manufacturing method thereof |
| CN110143601A (en) * | 2018-02-11 | 2019-08-20 | 天津市职业大学 | The preparation method of antifungin nano wire and its application in the epoxy |
| CN114649566A (en) * | 2022-04-19 | 2022-06-21 | 珠海中科先进技术研究院有限公司 | Diaphragm for solid electrolyte of lithium battery and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044758A (en) * | 2012-12-21 | 2013-04-17 | 上海至正道化高分子材料有限公司 | Thermoplastic water-resistant low-smoke halogen-free flame retardant cable material and manufacturing method thereof |
| CN110143601A (en) * | 2018-02-11 | 2019-08-20 | 天津市职业大学 | The preparation method of antifungin nano wire and its application in the epoxy |
| CN114649566A (en) * | 2022-04-19 | 2022-06-21 | 珠海中科先进技术研究院有限公司 | Diaphragm for solid electrolyte of lithium battery and preparation method thereof |
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