CN113736167A - Weather-resistant silane crosslinked polyethylene overhead insulating material and preparation method thereof - Google Patents
Weather-resistant silane crosslinked polyethylene overhead insulating material and preparation method thereof Download PDFInfo
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- CN113736167A CN113736167A CN202111160089.4A CN202111160089A CN113736167A CN 113736167 A CN113736167 A CN 113736167A CN 202111160089 A CN202111160089 A CN 202111160089A CN 113736167 A CN113736167 A CN 113736167A
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- 239000011810 insulating material Substances 0.000 title claims abstract description 38
- 239000004718 silane crosslinked polyethylene Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 125
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 61
- 239000003795 chemical substances by application 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
- 239000000314 lubricant Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- -1 polypropylene Polymers 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 26
- 239000010949 copper Substances 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 20
- 239000003999 initiator Substances 0.000 claims abstract description 20
- 239000004743 Polypropylene Substances 0.000 claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000006229 carbon black Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 24
- 239000000155 melt Substances 0.000 claims description 21
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 11
- 229910052731 fluorine Inorganic materials 0.000 claims description 11
- 239000011737 fluorine Substances 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000009461 vacuum packaging Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical compound COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 abstract description 9
- 229910000077 silane Inorganic materials 0.000 abstract description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 abstract description 5
- 238000003878 thermal aging Methods 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 description 10
- 229920001973 fluoroelastomer Polymers 0.000 description 5
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/08—Crosslinking by silane
Abstract
The invention discloses a weather-resistant silane cross-linked polyethylene overhead insulating material, which is prepared from a material A and a material B, wherein the weight ratio of the material A to the material B is 80-98: 3-15; wherein the A material comprises the following components: polyethylene resin 1, polyethylene resin 2, polypropylene resin, a silane coupling agent, an initiator, a lubricant, a water removing agent, an antioxidant and a copper resisting agent; wherein, the B material comprises the following components: polyethylene resin 1, polyethylene resin 2, lubricant, catalyst, antioxidant and black master batch. The invention also discloses a preparation method of the weather-resistant silane crosslinked polyethylene overhead insulating material. The overhead insulating material prepared by the silane crosslinking process has obvious weather resistance under high carbon black content, and has the advantages of high volume resistivity, small dielectric loss, good thermal aging resistance, good stress cracking resistance, easy processing and low cost.
Description
Technical Field
The invention belongs to the technical field of wire and cable materials, and particularly relates to a weather-resistant silane crosslinked polyethylene overhead insulating material and a preparation method thereof.
Background
Overhead wire cables are inseparable from people's work and life, and overhead wire cables are likely to be used in almost every place. With the continuous development of economy, the dosage of overhead electric wires and cables is continuously multiplied, wherein the silane crosslinked overhead polyethylene insulating material has the characteristics of high volume resistivity, small dielectric loss, good thermal aging resistance, good stress cracking resistance, easiness in processing, low price and the like, so that the dosage of the silane crosslinked overhead polyethylene insulating material in the electric wires and cables is also multiplied.
Currently, crosslinked polyethylene is mainly obtained by three ways, namely peroxide crosslinking, irradiation crosslinking and silane crosslinking, wherein silane crosslinked polyethylene is prepared by introducing crosslinkable alkoxy silane on a polyethylene main chain in a grafting or copolymerization way. The silane crosslinking does not need special crosslinking equipment, the process control is simpler, and the obtained cable material has excellent electrical properties, so the cable material has incomparable advantages in the field of medium and low voltage wires and cables. However, the working environment of the overhead electric wire and cable is often severe, so that a higher requirement is provided for the weather resistance of the silane crosslinked polyethylene overhead insulating material at the present stage, and meanwhile, the silane crosslinked polyethylene overhead insulating material needs to meet the index requirement of the JB/T10260-2014 product, wherein the key problem of the technology is how to efficiently add the high-content carbon black master batch and ensure the uniform dispersibility of the carbon black.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a weather-resistant silane crosslinked polyethylene overhead insulating material and a preparation method thereof; the overhead insulating material prepared by the silane crosslinking process has obvious weather resistance under high carbon black content, and has the advantages of high volume resistivity, small dielectric loss, good thermal aging resistance, good stress cracking resistance, easy processing and low cost.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a weather-resistant silane cross-linked polyethylene overhead insulating material is prepared from a material A and a material B, wherein the weight ratio of the material A to the material B is 80-98: 3-15;
wherein the material A comprises the following components in parts by weight:
wherein the material B comprises the following components in parts by weight:
the density of the polyethylene resin in the material A and the material B is 0.910 to 0.925g/cm3Wherein the melt index of the polyethylene resin 1 at 190 ℃ under the condition of 2.16kg load is 1.5-2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under the condition of 2.16kg load is 18-22g/10 min;
the polypropylene resin in the material A has a melt index of 0.5-2.5g/10min at 190 ℃ under the load of 2.16 kg.
Further, the silane coupling agent in the material A is at least one of vinyltrimethoxysilane, vinyltriethoxysilane and vinyltris (beta-methoxyethoxy) silane; the initiator in the material A is at least one of dicumyl peroxide, di-tert-butyl peroxide and diphenylmethane peroxide.
Further, the lubricant in the material A comprises the following components in parts by weight:
wherein the content of the fluorine-containing polymer in the fluorine rubber is 14-26%.
Further, the antioxidant in the material A and the material B is AT least one of antioxidant 300, antioxidant 1076, antioxidant AT-10 and antioxidant DLTP.
Further, the copper resisting agent in the material A is one or a mixture of 1024 copper resisting agents and 905 copper resisting agents; the water scavenger in the material A is trimethoxymethane.
Further, a catalyst in the material B is dibutyltin dilaurate; the black master batch in the B material contains 44-46% of carbon black.
Further, the lubricant in the material B is at least one of polyethylene wax, zinc stearate and silicone.
The invention further provides a preparation method of the weather-resistant silane cross-linked polyethylene overhead insulating material,
the preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) extruding the mixed resin dried in the step (1) through a double-screw extruder, and simultaneously injecting liquid into three regions of the double-screw extruder according to a proportion by using a liquid injection gun; wherein the heating temperature of the double-screw extruder is 160-210 ℃;
(4) the extruded melt enters a single-screw extruder for extrusion, wherein the heating temperature of the single-screw extruder is 140-160 ℃; after extrusion, water cutting granulation, dehydration and centrifugation, vibration screening, and vacuum packaging of finished products after passing through a fluidized bed;
the preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the heating temperature of the double-screw extruder is 140-220 ℃; after extrusion, granulating, drying by a rocking roller, and finally packaging a finished product;
and mixing the material A and the material B according to a ratio to obtain the weather-resistant silane crosslinked polyethylene overhead insulating material.
The invention has the beneficial effects that:
according to the invention, the silane crosslinked polyethylene overhead insulating material is prepared by preparing the material A and the material B, and the optimal ratio of the material A to the material B is adjusted, so that carbon black in the insulating material is uniformly dispersed, and the problem of carbon black agglomeration is reduced.
The invention adopts two polyethylene resins with melt indexes when preparing the material A and the material B, can adjust the melt index of the insulating material, and can ensure that the insulating material has higher mechanical strength while ensuring better fluidity in the processing process of the insulating material.
According to the invention, a silane crosslinking process is adopted, and a mode of preparing the material A and the material B is adopted to prepare the silane crosslinked polyethylene overhead insulating material, the carbon black content of the obtained insulating material is more than 2%, the carbon black is uniformly dispersed, the insulating material is suitable for overhead cables of 10kV or below, and the conductor can be allowed to have the maximum working temperature of 90 ℃ for a long time; the silane crosslinked polyethylene overhead insulation board material has obvious weather resistance, and has the advantages of high volume resistivity, small dielectric loss, good heat and aging resistance, good stress cracking resistance, easy processing, low price and the like.
The overhead insulating material obtained by the invention has no pre-crosslinking phenomenon, the surface of the obtained cable is smooth, the extrusion speed in the processing process is high, the better puncture resistance can be ensured, the hot elongation and hot shrinkage performance indexes of the cable have large allowance, and the extrusion and discharge waste in the production process is less.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a weather-resistant silane cross-linked polyethylene overhead insulating material, which is prepared from a raw material A and a raw material B, wherein the weight ratio of the material A to the material B is 80-98: 3-15;
wherein the material A comprises the following components in parts by weight:
wherein the material B comprises the following components in parts by weight:
the density of the polyethylene resin in the material A and the material B is 0.910 to 0.925g/cm3Wherein the melt index of the polyethylene resin 1 at 190 ℃ under the condition of 2.16kg load is 1.5-2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under the condition of 2.16kg load is 18-22g/10 min;
the polypropylene resin in the material A has a melt index of 0.5-2.5g/10min at 190 ℃ under the load of 2.16 kg.
Wherein, the silane coupling agent in the material A is at least one of vinyl trimethoxy silane, vinyl triethoxy silane and vinyl tri (beta-methoxyethoxy) silane; the initiator in the material A is at least one of dicumyl peroxide, di-tert-butyl peroxide and diphenylmethane peroxide.
Wherein, the lubricant in the material A comprises the following components in parts by weight:
wherein the content of the fluorine-containing polymer in the fluorine rubber is 14-26%.
Wherein, the antioxidant in the material A and the material B is AT least one of antioxidant 300, antioxidant 1076, antioxidant AT-10 and antioxidant DLTP.
Wherein, the copper resisting agent in the material A is one or a mixture of 1024 copper resisting agents and 905 copper resisting agents; the water scavenger in the material A is trimethoxymethane.
Wherein the catalyst in the material B is dibutyltin dilaurate; the black master batch in the B material contains 44-46% of carbon black.
Wherein, the lubricant in the material B is at least one of polyethylene wax, zinc stearate and silicone.
The invention further provides a preparation method of the weather-resistant silane crosslinked polyethylene overhead insulating material,
the preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) extruding the mixed resin dried in the step (1) through a double-screw extruder, and simultaneously injecting liquid into three regions of the double-screw extruder according to a proportion by using a liquid injection gun; wherein the heating temperature of the double-screw extruder is 160-210 ℃;
(4) the extruded melt enters a single-screw extruder for extrusion, wherein the heating temperature of the single-screw extruder is 140-160 ℃; after extrusion, water cutting granulation, dehydration and centrifugation, vibration screening, and vacuum packaging of finished products after passing through a fluidized bed;
the preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the heating temperature of the double-screw extruder is 140-220 ℃; after extrusion, granulating, drying by a rocking roller, and finally packaging a finished product;
and mixing the material A and the material B according to a ratio to obtain the weather-resistant silane crosslinked polyethylene overhead insulating material.
Example 1
The material A comprises the following components in parts by weight:
the material B comprises the following components in parts by weight:
the polyethylene resin in the A and B materials had a density of 0.920g/cm3The melt index of the polyethylene resin 1 at 190 ℃ under a load of 2.16kg is 2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under a load of 2.16kg is 20g/10 min;
the polypropylene resin in the material A has a melt index of 1.5g/10min at 190 ℃ under a load of 2.16 kg.
The lubricant in the material A consists of the following components in parts by weight:
wherein the fluorine-containing polymer content in the fluororubber is 20%.
The preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) extruding the mixed resin dried in the step (1) through a double-screw extruder, and simultaneously injecting liquid into three regions of the double-screw extruder according to a proportion by using a liquid injection gun; wherein the specific heating temperature T1-T10 of the twin-screw extruder is 160 ℃, 120 ℃, 175 ℃, 185 ℃, 190 ℃, 185 ℃, 180 ℃ and 175 ℃;
(4) extruding the extruded melt in a single-screw extruder, wherein the heating temperature T11-T12 of the single-screw extruder is 145 ℃, the heating temperature is 155 ℃, and the head temperature is 175 ℃; and then cutting into granules with water, dehydrating, centrifuging, vibrating, screening, and vacuum packaging after passing through a fluidized bed.
The preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the specific heating temperature T1-T8 of the double-screw extruder is 145 ℃, 170 ℃, 195 ℃, 190 ℃, 215 ℃, 220 ℃, 210 ℃, 190 ℃ and the head temperature of the double-screw extruder is 190 ℃; and (4) drying the extruded granules by a rocking machine, and finally packaging finished products.
The materials A and B obtained in example 1 were mixed according to a ratio of 90: 10 to obtain the weather-resistant silane cross-linked polyethylene overhead insulating material.
Example 2
The material A comprises the following components in parts by weight:
the material B comprises the following components in parts by weight:
the polyethylene resin in the A and B materials had a density of 0.920g/cm3The melt index of the polyethylene resin 1 at 190 ℃ under a load of 2.16kg is 2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under a load of 2.16kg is 20g/10 min;
the polypropylene resin in the material A has a melt index of 1.5g/10min at 190 ℃ under a load of 2.16 kg.
The lubricant in the material A consists of the following components in parts by weight:
wherein the fluorine-containing polymer content in the fluororubber is 20%.
The preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) and (2) extruding the mixed resin dried in the step (1) through a double-screw extruder, and injecting liquid into a liquid injection gun in three regions of the double-screw extruder in proportion. Wherein the specific heating temperature T1-T10 of the twin-screw extruder is 160 ℃, 120 ℃, 175 ℃, 185 ℃, 190 ℃, 185 ℃, 180 ℃ and 175 ℃;
(4) extruding the extruded melt in a single-screw extruder, wherein the heating temperature T11-T12 of the single-screw extruder is 145 ℃, the heating temperature is 155 ℃, and the head temperature is 175 ℃; and then cutting into granules with water, dehydrating, centrifuging, vibrating, screening, and vacuum packaging after passing through a fluidized bed.
The preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the specific heating temperature T1-T8 of the double-screw extruder is 145 ℃, 170 ℃, 195 ℃, 190 ℃, 215 ℃, 220 ℃, 210 ℃, 190 ℃ and the head temperature of the double-screw extruder is 190 ℃; and (4) drying the extruded granules by a rocking machine, and finally packaging finished products.
The materials A and B obtained in example 2 were mixed according to a ratio of 90: 10 to obtain the weather-resistant silane cross-linked polyethylene overhead insulating material.
Example 3
The material A comprises the following components in parts by weight:
the material B comprises the following components in parts by weight:
the polyethylene resin in the A and B materials had a density of 0.920g/cm3The melt index of the polyethylene resin 1 at 190 ℃ under a load of 2.16kg is 2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under a load of 2.16kg is 20g/10 min;
the polypropylene resin in the material A has a melt index of 1.5g/10min at 190 ℃ under a load of 2.16 kg.
The lubricant in the material A consists of the following components in parts by weight:
wherein the fluorine-containing polymer content in the fluororubber is 20%.
The preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) and (2) extruding the mixed resin dried in the step (1) through a double-screw extruder, and injecting liquid into a liquid injection gun in three regions of the double-screw extruder in proportion. Wherein the specific heating temperature T1-T10 of the twin-screw extruder is 160 ℃, 120 ℃, 175 ℃, 185 ℃, 190 ℃, 185 ℃, 180 ℃ and 175 ℃;
(4) extruding the extruded melt in a single-screw extruder, wherein the heating temperature T11-T12 of the single-screw extruder is 145 ℃, the heating temperature is 155 ℃, and the head temperature is 175 ℃; and then cutting into granules with water, dehydrating, centrifuging, vibrating, screening, and vacuum packaging after passing through a fluidized bed.
The preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the specific heating temperature T1-T8 of the double-screw extruder is 145 ℃, 170 ℃, 195 ℃, 190 ℃, 215 ℃, 220 ℃, 210 ℃, 190 ℃ and the head temperature of the double-screw extruder is 190 ℃; and (4) drying the extruded granules by a rocking machine, and finally packaging finished products.
The materials A and B obtained in example 3 were mixed according to a 90: 10 to obtain the weather-resistant silane cross-linked polyethylene overhead insulating material.
Example 4
The material A comprises the following components in parts by weight:
the material B comprises the following components in parts by weight:
the polyethylene resin in the A and B materials had a density of 0.920g/cm3The melt index of the polyethylene resin 1 at 190 ℃ under a load of 2.16kg is 2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under a load of 2.16kg is 20g/10 min;
the polypropylene resin in the material A has a melt index of 1.5g/10min at 190 ℃ under a load of 2.16 kg.
The lubricant in the material A consists of the following components in parts by weight:
wherein the fluorine-containing polymer content in the fluororubber is 20%.
The preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) and (2) extruding the mixed resin dried in the step (1) through a double-screw extruder, and injecting liquid into a liquid injection gun in three regions of the double-screw extruder in proportion. Wherein the specific heating temperature T1-T10 of the twin-screw extruder is 160 ℃, 120 ℃, 175 ℃, 185 ℃, 190 ℃, 185 ℃, 180 ℃ and 175 ℃;
(4) extruding the extruded melt in a single-screw extruder, wherein the heating temperature T11-T12 of the single-screw extruder is 145 ℃, the heating temperature is 155 ℃, and the head temperature is 175 ℃; and then cutting into granules with water, dehydrating, centrifuging, vibrating, screening, and vacuum packaging after passing through a fluidized bed.
The preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the specific heating temperature T1-T8 of the double-screw extruder is 145 ℃, 170 ℃, 195 ℃, 190 ℃, 215 ℃, 220 ℃, 210 ℃, 190 ℃ and the head temperature of the double-screw extruder is 190 ℃; and (4) drying the extruded granules by a rocking machine, and finally packaging finished products.
The materials A and B obtained in example 4 were mixed according to a 90: 10 to obtain the weather-resistant silane cross-linked polyethylene overhead insulating material.
Example 5
The material A comprises the following components in parts by weight:
the material B comprises the following components in parts by weight:
the polyethylene resin in the A and B materials had a density of 0.920g/cm3The polyethylene resin 1 had a melt index of 2.5g/1 at 190 ℃ under a load of 2.16kg0min, the melt index of the polyethylene resin 2 is 20g/10min at 190 ℃ under the condition of 2.16kg load;
the polypropylene resin in the material A has a melt index of 1.5g/10min at 190 ℃ under a load of 2.16 kg.
The lubricant in the material A consists of the following components in parts by weight:
wherein the fluorine-containing polymer content in the fluororubber is 20%.
The preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) and (2) extruding the mixed resin dried in the step (1) through a double-screw extruder, and injecting liquid into a liquid injection gun in three regions of the double-screw extruder in proportion. Wherein the specific heating temperature T1-T10 of the twin-screw extruder is 160 ℃, 120 ℃, 175 ℃, 185 ℃, 190 ℃, 185 ℃, 180 ℃ and 175 ℃;
(4) extruding the extruded melt in a single-screw extruder, wherein the heating temperature T11-T12 of the single-screw extruder is 145 ℃, the heating temperature is 155 ℃, and the head temperature is 175 ℃; and then cutting into granules with water, dehydrating, centrifuging, vibrating, screening, and vacuum packaging after passing through a fluidized bed.
The preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the specific heating temperature T1-T8 of the double-screw extruder is 145 ℃, 170 ℃, 195 ℃, 190 ℃, 215 ℃, 220 ℃, 210 ℃, 190 ℃ and the head temperature of the double-screw extruder is 190 ℃; and (4) drying the extruded granules by a rocking machine, and finally packaging finished products.
The materials A and B obtained in example 5 were mixed according to a 90: 10 to obtain the weather-resistant silane cross-linked polyethylene overhead insulating material.
The insulation materials of examples 1 to 5 were extruded to form wires, and the resulting wires were subjected to comprehensive property tests, the property results of which are shown in table 1:
TABLE 1
As shown in Table 1, the silane crosslinked polyethylene overhead insulation material has remarkable weather resistance, and has the advantages of high volume resistivity, small dielectric loss, good thermal aging resistance and good stress cracking resistance.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (8)
1. A weather-resistant silane cross-linked polyethylene overhead insulating material is characterized in that a preparation raw material consists of a material A and a material B, and the weight ratio of the material A to the material B is 80-98: 3-15;
wherein the material A comprises the following components in parts by weight:
wherein the material B comprises the following components in parts by weight:
the density of the polyethylene resin in the material A and the material B is 0.910 to 0.925g/cm3Wherein the melt index of the polyethylene resin 1 at 190 ℃ under the condition of 2.16kg load is 1.5-2.5g/10min, and the melt index of the polyethylene resin 2 at 190 ℃ under the condition of 2.16kg load is 18-22g/10 min;
the polypropylene resin in the material A has a melt index of 0.5-2.5g/10min at 190 ℃ under the load of 2.16 kg.
2. The overhead insulating material of claim 1, wherein the silane coupling agent in the material A is at least one of vinyltrimethoxysilane, vinyltriethoxysilane and vinyltris (β -methoxyethoxy) silane; the initiator in the material A is at least one of dicumyl peroxide, di-tert-butyl peroxide and diphenylmethane peroxide.
3. The overhead insulating material of the weather-resistant silane crosslinked polyethylene as claimed in claim 1, wherein the lubricant in the material A comprises the following components in parts by weight:
wherein the content of the fluorine-containing polymer in the fluorine rubber is 14-26%.
4. The overhead insulation material of the weather-resistant silane crosslinked polyethylene of claim 1, wherein the antioxidant in the material A and the material B is AT least one of antioxidant 300, antioxidant 1076, antioxidant AT-10 and antioxidant DLTP.
5. The overhead insulation material of a weatherable silane crosslinked polyethylene according to claim 1, wherein the copper resistant agent in the material A is one or a mixture of two of 1024 copper resistant agent and 905 copper resistant agent; the water scavenger in the material A is trimethoxymethane.
6. The overhead insulating material of weatherable silane-crosslinked polyethylene according to claim 1, wherein the catalyst in the material B is dibutyltin dilaurate; the black master batch in the B material contains 44-46% of carbon black.
7. The overhead insulation material of a weatherable silane-crosslinked polyethylene according to claim 1, wherein the lubricant in the material B is at least one of polyethylene wax, zinc stearate and silicone.
8. The overhead insulating material of a weatherable silane-crosslinked polyethylene according to any one of claims 1 to 7,
the preparation method of the material A comprises the following steps:
(1) mixing polyethylene resin 1, polyethylene resin 2, polypropylene resin and a lubricant in proportion for more than 0.5h, and drying in a drying bin at 65 ℃;
(2) weighing and mixing a silane coupling agent, an initiator, an antioxidant, a copper resisting agent and a water removing agent according to a proportion, magnetically stirring until the silane coupling agent, the initiator, the antioxidant, the copper resisting agent and the water removing agent are completely dissolved, and adding the mixture into a liquid injection gun;
(3) extruding the mixed resin dried in the step (1) through a double-screw extruder, and simultaneously injecting liquid into three regions of the double-screw extruder according to a proportion by using a liquid injection gun; wherein the heating temperature of the double-screw extruder is 160-210 ℃;
(4) the extruded melt enters a single-screw extruder for extrusion, wherein the heating temperature of the single-screw extruder is 140-160 ℃; after extrusion, water cutting granulation, dehydration and centrifugation, vibration screening, and vacuum packaging of finished products after passing through a fluidized bed;
the preparation method of the material B comprises the following steps:
(1) weighing polyethylene resin 1, polyethylene resin 2, a lubricant, a catalyst, an antioxidant and a black master batch in proportion, and uniformly mixing in a high-speed mixer to obtain a mixture;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for extrusion, wherein the heating temperature of the double-screw extruder is 140-220 ℃; after extrusion, granulating, drying by a rocking roller, and finally packaging a finished product;
and mixing the material A and the material B according to a ratio to obtain the weather-resistant silane crosslinked polyethylene overhead insulating material.
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Application publication date: 20211203 |