CN115838503A - High-temperature-resistant peelable semiconductive polypropylene insulation shielding material and preparation method thereof - Google Patents
High-temperature-resistant peelable semiconductive polypropylene insulation shielding material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 58
- -1 polypropylene Polymers 0.000 title claims abstract description 45
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 42
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 42
- 238000009413 insulation Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000006229 carbon black Substances 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical class C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 7
- 229920006228 ethylene acrylate copolymer Polymers 0.000 claims abstract description 7
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 7
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 7
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000001993 wax Substances 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- 229920003312 Appeel® Polymers 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims 1
- 229910021389 graphene Inorganic materials 0.000 claims 1
- 239000002048 multi walled nanotube Substances 0.000 claims 1
- 239000002109 single walled nanotube Substances 0.000 claims 1
- 238000004132 cross linking Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 229920001169 thermoplastic Polymers 0.000 description 9
- 239000004416 thermosoftening plastic Substances 0.000 description 9
- 239000012774 insulation material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 239000003431 cross linking reagent Substances 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Abstract
A high-temperature resistant peelable semiconductive polypropylene insulation shielding material comprises the following raw materials: 15-30 parts of polypropylene; 15-30 parts of modified ethylene-acrylate copolymer; 40-55 parts of high-density polyethylene; 20-35 parts of superconducting carbon black; 5-10 parts of a nano carbon material; 0.5-2 parts of antioxidant; 0.4-1 part of copper resisting agent; 3-5 parts of a lubricant; the parts are parts by mass. The preparation method of the insulation shielding material comprises the steps of mixing polypropylene, high-density polyethylene, modified ethylene-acrylate copolymer, antioxidant, copper resisting agent and lubricant in a stirrer to uniformly disperse particles and powder; then adding the mixture into a reciprocating machine for mixing; then adding the superconducting carbon black and the nano carbon material into a reciprocating machine for continuous mixing; and finally granulating. The invention has the characteristics of non-crosslinking, high temperature resistance grade, long service life, low energy consumption, no pollution, recyclability and the like.
Description
Technical Field
The invention relates to a high-temperature-resistant strippable semiconductive polypropylene insulation shielding material and a preparation method thereof, belonging to the field of cable materials.
Background
With the rapid development of economy and the improvement of the demand of electric energy in China, the use amount of the power cable is larger and larger. At present, the semiconductive insulation shielding material of 35kV and below made in China is completely prepared by taking EVA (ethylene-vinyl acetate copolymer) or PE (polyethylene) as a base material, taking conductive carbon black as conductive grafting, and adding a cross-linking agent and other auxiliary agents. Because the EVA or PE resin has low temperature resistance level and cannot meet the requirement of the power cable on the temperature resistance characteristic, a cross-linking agent needs to be added to change the cross-linking of plastics into thermosetting so as to improve the temperature resistance level of the power cable.
The semiconductive shielding material for high-voltage cables added with the crosslinking agent has the following disadvantages:
after the cross-linking agent is added, the molecular structure of the cable is changed into a net structure, the dense net structure can obstruct the connection between particles of the conductive carbon black, the formation of a conductive network is reduced, the volume resistivity is increased, and the electric field homogenization effect on a cable product is influenced.
EVA or PE becomes thermosetting material after crosslinking, can not recycle, is unfavorable for environmental protection.
The polypropylene has the advantages of high mechanical strength, easy processing, stable chemical property, low price, good heat resistance, good electrical insulation property and the like, is a thermoplastic material, becomes one of the most rapid plastic with the current output increasing speed, and is the third most common plastic. The polypropylene is used as the environment-friendly insulating material of the power cable at present, which is a hot point of research, and the research has obvious environmental and energy benefits. Compared with XLPE, the polypropylene material can be recycled, which accords with the low-carbon and environment-friendly guidance of the current society, so that the polypropylene is an ideal recyclable cable insulation material.
The research on the thermoplastic semiconductive shielding material matched with the polypropylene cable insulating material is also of great significance, the thermoplastic semiconductive shielding material, especially the strippable semiconductive shielding material, is reported less at home and abroad at present, and the comprehensive performance of the thermoplastic semiconductive shielding material needs to be further improved.
Disclosure of Invention
The thermoplastic strippable semiconductive polypropylene insulation shielding material has the characteristics of non-crosslinking property, high temperature resistance grade, good strippability between the insulation material and the thermoplastic strippable semiconductive shielding material at normal temperature, certain stripping force between the insulation material and the thermoplastic strippable semiconductive shielding material at high temperature, long service life, low energy consumption, no pollution, recyclability and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-temperature-resistant peelable semiconductive polypropylene insulation shielding material comprises the following raw materials:
the parts are parts by mass; wherein the melt flow rate of the polypropylene is less than or equal to 1.8g/10min (the test condition is 210 ℃/2.16 kg), the melting point is more than or equal to 160 ℃, and the density is 0.890 +/-0.010 g/cm 3 。
The polypropylene can improve the temperature resistance grade of the strippable semiconductive shielding material; the high-density polyethylene can improve the low-temperature resistance of the strippable semiconductive shielding material and the strippability of the polypropylene insulating material; by adding the modified ethylene-acrylate copolymer, the obvious adhesive force between the shield and the insulation at high temperature can be ensured, the peeling force between the shield and the insulation at normal temperature can not be obviously improved, the peelability of the shield can be ensured, and meanwhile, the phenomenon that the insulation shield and the insulation layer are empty at the bent part of the cable in the operation process can be avoided, so that the service life is influenced.
In order to further ensure the conductivity of the high-temperature-resistant strippable semiconductive insulation shielding material, the superconducting carbon black is adopted, the iodine absorption value of the superconducting carbon black of the carbon black is 950-1500mg/g, the oil absorption value is 300-460cc/100g, the 325-mesh screen residue is less than 10ppm, a nano carbon material is additionally added, a stable and efficient conductive network is formed by synergism with the superconducting carbon black, the addition of the carbon black is obviously reduced, the conductivity of the shielding material is ensured to meet the requirement, the material density is reduced, and the extrusion processability is improved.
In order to further prolong the service life of the high-temperature resistant strippable semiconductive insulation shielding material, and further promote the synergistic effect among the components and improve the mechanical property of the product, the antioxidant is at least one of 445, 1010, 1035 and 1330.
In order to further prolong the service life of the product and ensure the mechanical property of the product, the copper-resistant agent is at least one of 1024, 697, MB and methyl benzotriazole.
In order to further ensure the extrusion processing performance of the semiconductive polypropylene insulation shielding material used for the high-temperature resistant strippable type and the dispersibility of the carbon black, the lubricant is at least one of fluoride, silicone, EBS, polypropylene wax, polyethylene wax, calcium stearate and zinc stearate.
When the high-temperature-resistant peelable semiconductive polypropylene insulation shielding material is prepared, the raw material components can be uniformly mixed in a high-speed mixer, then extruded and granulated by a reciprocating machine, and then dried to obtain the high-temperature-resistant peelable semiconductive insulation shielding material. The preparation method is simple and easy to operate.
In order to ensure the extrusion performance and the service performance of the obtained granules, further improve the uniformity of the obtained shielding material and further improve the comprehensive performance of the shielding material, the preparation method of the high-temperature resistant peelable semiconductive insulation shielding material comprises the following steps:
1) Weighing: accurately weighing various materials according to a formula for later use;
2) Mixing:
2.1 Mixing polypropylene, high density polyethylene, modified ethylene-acrylate copolymer, antioxidant, copper resisting agent and lubricant in a stirrer at 60 deg.C and stirring rate of 40r/min for 10-15min to disperse particles and powder uniformly;
2.2 Using a reciprocating machine for production, and adding the material obtained in the step 2.1) into a main feeding port of the reciprocating machine through a weightless scale.
2.3 Adding the superconducting carbon black and the nano carbon material into a reciprocating machine through a side feeding port, and continuously mixing.
2.4 ) the mixture is injected into a single screw extruder and extruded to produce particles of the semiconductive shielding material by underwater pelletization.
The upper-stage temperature of the reciprocating engine is as follows: the feeding section is 155 plus or minus 30 ℃, the mixing section is 165 plus or minus 33 ℃, and the extrusion section is 165 plus or minus 33 ℃. The lower-order single-screw temperatures were: the body is 155 +/-30 ℃, and the head is 160 +/-32 ℃.
The thermoplastic strippable semiconductive polypropylene insulation shielding material has the characteristics of non-crosslinking, high temperature resistance level, good strippability between the insulation material and the thermoplastic strippable semiconductive polypropylene insulation shielding material at normal temperature, certain stripping force between the insulation material and the thermoplastic strippable semiconductive polypropylene insulation shielding material at high temperature, long service life, low energy consumption, no pollution, recyclability and the like.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
Accurately weighing various materials according to a formula for later use; mixing polypropylene, high density polyethylene, modified ethylene-acrylate copolymer, antioxidant, copper resisting agent and lubricant in a stirrer at 60 deg.c for 10-15min to disperse particles and powder homogeneously. And (3) using a reciprocating machine for production, adding the material obtained in the step 2.1) into a main feed of the reciprocating machine through a weightless scale, adding the superconducting carbon black and the nano carbon material into the reciprocating machine through a side feed, and continuously mixing. And injecting the mixture into a single-screw extruder for extrusion, and carrying out underwater granulation to prepare particles of the semiconductive shielding material.
The upper-stage temperature of the reciprocating engine is as follows: the feeding section is 155 ℃, the mixing section is 165 ℃ and the extruding section is 165 ℃. The lower order single screw temperature was: 155 ℃ in the machine body and 160 ℃ in the machine head.
The polypropylene insulating material of the power cable used for the peel force test is polypropylene resin produced by the petrochemical copolymerization of Yanshan mountain, and the internal brand is PP-RJ-35.
The relevant properties of the prepared cable materials are shown in table 1.
Example 2
The mixing and extrusion granulation processes were the same as in example 1. The environmental protection type power cable polypropylene insulation material used in the peel force test was the same as in example 1. The properties of the prepared cable material are shown in table 1.
Example 3
The mixing and extrusion granulation processes were the same as in example 1. The environmental protection type power cable polypropylene insulation material used in the peel force test was the same as in example 1. The properties of the prepared cable material are shown in table 1.
Example 4
The mixing and extrusion granulation processes were the same as in example 1. The environmental protection type power cable polypropylene insulation material used in the peel force test was the same as in example 1. The properties of the prepared cable material are shown in table 1.
The properties of the prepared cable material are shown in table 1.
TABLE 1 test results of the properties of the cable materials prepared in examples 1 to 4 and comparative example
Claims (10)
1. The high-temperature-resistant peelable semiconductive polypropylene insulation shielding material is characterized in that: the raw materials comprise the following components:
the parts are parts by mass.
2. The high temperature peel resistant semiconductive polypropylene insulation shield according to claim 1, wherein: the melt flow rate of the polypropylene is less than or equal to 1.8g/10min (210 ℃/2.16 kg), the melting point is more than or equal to 160 ℃, and the density is 0.890 +/-0.010 g/cm 3 。
3. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the modified ethylene-acrylate copolymer is one of the U.S. dupont Appeel series resins, including 53007, 53071 or 20D867.
4. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the melt flow rate of the high-density polyethylene is more than or equal to 8g/10min (190 ℃/2.16 kg), and the melting point is more than or equal to 130 ℃.
5. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the superconducting carbon black has an iodine absorption value of 950-1500mg/g, an oil absorption value of 300-460cc/100g and a 325-mesh screen residue of less than 10ppm.
6. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the nano carbon material mainly comprises one of graphene sheets, single-walled carbon nanotubes and multi-walled carbon nanotubes.
7. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the antioxidant is at least one of antioxidant 445, antioxidant 1010, antioxidant 1035 and antioxidant 1330.
8. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the copper-resistant agent is at least one of a copper-resistant agent MD1024, a copper-resistant agent MD697, a copper-resistant agent MB and methyl benzotriazole.
9. The high temperature resistant strippable semiconductive polypropylene insulation shield material of claim 1 or 2, wherein: the lubricant is at least one of lubricant fluoride, silicone, EBS, polypropylene wax, polyethylene wax, calcium stearate and zinc stearate.
10. The method for preparing the high-temperature-resistant peelable semiconductive polypropylene insulation shield material according to any one of claims 1 to 9, wherein the method comprises the following steps: the method comprises the following steps:
1) Weighing: accurately weighing various materials according to a formula for later use;
2) Mixing:
2.1 Mixing polypropylene, high-density polyethylene, modified ethylene-acrylate copolymer, antioxidant, copper resisting agent and lubricant in a mixer for 10-15min at 60 deg.c and stirring speed of 40r/min to disperse the particles and powder homogeneously;
2.2 Using a reciprocating machine for production, adding the material obtained in the step 2.1) into a main feed of the reciprocating machine through a weightless scale;
2.3 Adding the superconducting carbon black and the nano carbon material into a reciprocating machine through side feeding, and continuously mixing;
2.4 Injecting the mixture into a single-screw extruder for extrusion, and granulating the mixture into particles of the semiconductive shielding material by underwater granulation;
the upper-stage temperature of the reciprocating engine is as follows: a feeding section is 155 +/-30 ℃, a mixing section is 165 +/-33 ℃, and an extrusion section is 165 +/-33 ℃; the lower-order single-screw temperatures were: the body is 155 +/-30 ℃, and the head is 160 +/-32 ℃.
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| CN202210578894.7A CN115838503B (en) | 2022-05-26 | 2022-05-26 | High-temperature-resistant strippable semiconductive polypropylene insulation shielding material and preparation method thereof |
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| CN202210578894.7A CN115838503B (en) | 2022-05-26 | 2022-05-26 | High-temperature-resistant strippable semiconductive polypropylene insulation shielding material and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108864527A (en) * | 2018-05-30 | 2018-11-23 | 上海交通大学 | Semi-conductive screen layer material and preparation method for high-tension cable polypropylene insulation |
| CN111303516A (en) * | 2020-03-03 | 2020-06-19 | 江苏上上电缆集团新材料有限公司 | Environment-friendly thermoplastic strippable semiconductive shielding material for power cable insulation and preparation method thereof |
| CN113549276A (en) * | 2021-08-13 | 2021-10-26 | 浙江万马高分子材料集团有限公司 | Semiconductive shielding material and preparation method thereof |
| CN113943454A (en) * | 2021-09-16 | 2022-01-18 | 江苏上上电缆集团新材料有限公司 | Graphene and carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof |
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- 2022-05-26 CN CN202210578894.7A patent/CN115838503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108864527A (en) * | 2018-05-30 | 2018-11-23 | 上海交通大学 | Semi-conductive screen layer material and preparation method for high-tension cable polypropylene insulation |
| CN111303516A (en) * | 2020-03-03 | 2020-06-19 | 江苏上上电缆集团新材料有限公司 | Environment-friendly thermoplastic strippable semiconductive shielding material for power cable insulation and preparation method thereof |
| CN113549276A (en) * | 2021-08-13 | 2021-10-26 | 浙江万马高分子材料集团有限公司 | Semiconductive shielding material and preparation method thereof |
| CN113943454A (en) * | 2021-09-16 | 2022-01-18 | 江苏上上电缆集团新材料有限公司 | Graphene and carbon nanotube synergistic high-electrical-property semiconductive shielding material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《工程塑料应用》杂志社编: "《2001年中国工程塑料工业加工及模具技术研讨会论文集》", pages: 249 * |
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