CN115838503B - High-temperature-resistant strippable semiconductive polypropylene insulation shielding material and preparation method thereof - Google Patents
High-temperature-resistant strippable semiconductive polypropylene insulation shielding material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 52
- -1 polypropylene Polymers 0.000 title claims abstract description 41
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 38
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 38
- 238000009413 insulation Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 9
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 9
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 9
- 239000000314 lubricant Substances 0.000 claims abstract description 9
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 9
- 229920001577 copolymer Polymers 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 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
- 238000012360 testing method Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 238000000034 method Methods 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
- 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
- 238000003756 stirring Methods 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
- 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
- 239000003795 chemical substances by application Substances 0.000 claims 4
- 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
- 238000004064 recycling Methods 0.000 abstract description 3
- 229920001169 thermoplastic Polymers 0.000 description 9
- 239000004416 thermosoftening plastic Substances 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 8
- 239000003431 cross linking reagent Substances 0.000 description 5
- 239000005038 ethylene vinyl acetate 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
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research 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
- 238000005452 bending Methods 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
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000011056 performance test 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
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- Compositions Of Macromolecular Compounds (AREA)
- Conductive Materials (AREA)
Abstract
The high-temperature-resistant strippable semiconductive polypropylene insulation shielding material comprises the following raw materials: 15-30 parts of polypropylene; 15-30 parts of modified ethylene-acrylic ester copolymer; 40-55 parts of high-density polyethylene; 20-35 parts of superconducting carbon black; 5-10 parts of nano carbon material; 0.5-2 parts of antioxidant; 0.4-1 part of copper inhibitor; 3-5 parts of a lubricant; the parts are mass parts. The preparation method of the insulating shielding material comprises the steps of firstly mixing polypropylene, high-density polyethylene, modified ethylene-acrylic ester copolymer, antioxidant, copper inhibitor and lubricant in a stirrer to enable particles and powder to be uniformly dispersed; then adding the mixture into a reciprocating machine for mixing; 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 level, long service life, low energy consumption, no pollution, recycling, 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 the economy and the improvement of the demand of electric power energy in China, the use amount of the power cable is larger and larger. At present, the semiconductive insulating shielding material of 35kV and below in China is 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 EVA or PE resin has low temperature resistance level, the requirements of the power cable on the temperature resistance can not be met, and a cross-linking agent is added to change the cross-linking of the plastic into thermosetting so as to improve the temperature resistance level.
The above-described semiconductive shield materials for high voltage cables to which the crosslinking agent is added have disadvantages as follows:
after the cross-linking agent is added, the molecular structure of the cross-linking agent is changed into a network structure, the dense network 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 affected.
EVA or PE becomes thermosetting material after crosslinking, can not be recycled, and is unfavorable for environmental protection.
The polypropylene has the advantages of high mechanical strength, easy processing, stable chemical property, low price, good heat resistance and electrical insulation property, and the like, is a thermoplastic material, and becomes one of the plastics with the fastest yield at present, and the yield is the third among five general plastics. At present, polypropylene is used as an environment-friendly insulating material of a power cable, and the research has obvious environmental and energy benefits. Compared with XLPE, the polypropylene material is recyclable, and accords with the low-carbon environment-friendly direction of the current society, so that the polypropylene is an ideal recyclable cable insulation material.
The research on thermoplastic semiconductive shielding materials matched with polypropylene cable insulating materials is also of great significance, and few reports are made on thermoplastic semiconductive shielding materials, especially strippable semiconductive shielding materials, at home and abroad at present, and the comprehensive performance of the thermoplastic semiconductive shielding materials is required to be further improved.
Disclosure of Invention
The invention provides a high-temperature-resistant strippable semiconductive polypropylene insulating shielding material and a preparation method thereof, wherein the thermoplastic strippable semiconductive shielding material has the characteristics of non-crosslinking, high temperature resistance level, good strippable property between the insulating material and the thermoplastic strippable semiconductive shielding material at normal temperature, certain stripping force between the insulating material and the thermoplastic strippable semiconductive polypropylene insulating shielding material at high temperature, long service life, low energy consumption, no pollution, recycling and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the high-temperature-resistant strippable semiconductive polypropylene insulation shielding material comprises the following raw materials:
the parts are mass parts; wherein the melt flow rate of 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 strippable semiconductive shielding material and the polypropylene insulating material; by adding the modified ethylene-acrylic ester copolymer, obvious adhesive force between the shielding and the insulation at high temperature can be ensured, the peeling force between the shielding and the insulation at normal temperature can not be obviously improved, the peelability of the shielding is ensured, and meanwhile, the situation that the insulating shielding and the insulating layer are empty at the bending part of the cable in the operation process can not occur, so that the service life is influenced can be ensured.
In order to further ensure the conductivity of the high-temperature resistant strippable semiconductive insulating 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, the nano carbon material is additionally added, and the nano carbon material and the superconducting carbon black cooperate to form a stable and efficient conductive network, so that the addition of the carbon black is obviously reduced, the material density is reduced while the conductivity of the shielding material is ensured to meet the requirements, and the extrusion processing performance is improved.
In order to further prolong the service life of the high-temperature resistant strippable semiconductive insulating shielding material, and further promote the synergistic effect of the components, the mechanical properties of the product are improved, and 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 inhibitor is at least one of 1024, 697, MB and tolyltriazole.
In order to further ensure extrusion processability and dispersibility of carbon black for the high temperature resistant peelable semiconductive polypropylene insulation shield, the lubricant is at least one of fluoride, silicone, EBS, polypropylene wax, polyethylene wax, calcium stearate and zinc stearate.
When the high-temperature-resistant strippable semiconductive polypropylene insulation shielding material is prepared, all raw material components can be uniformly mixed in a high-speed mixer, extruded by a reciprocating machine, granulated and dried to obtain the high-temperature-resistant strippable semiconductive insulation shielding material. The preparation method is simple and easy to operate.
In order to ensure extrusion performance and usability of the obtained granules, further improve uniformity of the obtained shielding material and further improve comprehensive performance of the shielding material, the preparation method of the high-temperature-resistant strippable semiconductive insulating shielding material comprises the following steps:
1) Weighing: accurately weighing various materials for standby according to a formula;
2) Mixing:
2.1 Firstly, mixing polypropylene, high-density polyethylene, modified ethylene-acrylic ester copolymer, antioxidant, copper inhibitor and lubricant in a stirrer for 10-15min, controlling the temperature at 60 ℃ and stirring speed at 40r/min to ensure that particles and powder are uniformly dispersed;
2.2 Using a reciprocating machine to produce, 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 continuing 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 machine is as follows: 155+/-30 ℃ in the feeding section, 165+/-33 ℃ in the mixing section and 165+/-33 ℃ in the extruding section. The lower single screw temperature is: the temperature of the machine body is 155+/-30 ℃ and the temperature of the machine 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 insulating material and the thermoplastic strippable semiconductive polypropylene insulation shielding material at normal temperature, certain stripping force between the insulating material and the thermoplastic strippable semiconductive polypropylene insulation shielding material at high temperature, long service life, low energy consumption, no pollution, recycling and the like.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrated, but are not limited to the following examples.
Example 1
Accurately weighing various materials for standby according to a formula; firstly, polypropylene, high-density polyethylene, modified ethylene-acrylic ester copolymer, antioxidant, copper inhibitor and lubricant are mixed in a stirrer for 10-15min, the temperature is controlled at 60 ℃, and the stirring speed is 40r/min, so that particles and powder are uniformly dispersed. 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 continuing mixing. The mixture is injected into a single screw extruder for extrusion, and the semiconductive shielding material particles are produced by underwater pelletization.
The upper-stage temperature of the reciprocating machine is as follows: 155 ℃ in the feeding section, 165 ℃ in the mixing section and 165 ℃ in the extrusion section. The lower single screw temperature is: body 155 ℃ and head 160 ℃.
The polypropylene insulating material of the power cable used for the peeling force test is polypropylene resin produced by petrifaction copolymerization of Yanshan, and the internal trademark is PP-RJ-35.
The properties of the prepared cable material are shown in Table 1.
Example 2
The process of mixing, extrusion granulation and the like is the same as in example 1. The environment-friendly power cable polypropylene insulation used for 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 process of mixing, extrusion granulation and the like is the same as in example 1. The environment-friendly power cable polypropylene insulation used for 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 process of mixing, extrusion granulation and the like is the same as in example 1. The environment-friendly power cable polypropylene insulation used for 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 cable Material Performance test made in examples 1-4 and comparative example
Claims (2)
1. A high-temperature resistant strippable semiconductive polypropylene insulation shielding material is characterized in that: the raw materials comprise the following components:
15-30 parts of polypropylene;
15-30 parts of modified ethylene-acrylic ester copolymer;
40-55 parts of high-density polyethylene;
20-35 parts of superconducting carbon black;
5-10 parts of nano carbon material;
3-5 parts of lubricant;
0.5-2 parts of antioxidant;
0.4 to 1 part of copper inhibitor;
the parts are mass parts;
the melt flow rate of the polypropylene is less than or equal to 1.8g/10min, and the test condition is 210 ℃/2.16kg; the melting point of polypropylene is more than or equal to 160 ℃; the density of the polypropylene is 0.890+ -0.010 g/cm 3 ；
The modified ethylene-acrylic ester copolymer is one of DuPont Applel series resins in U.S. and comprises 53007, 53071 or 20D867;
the melt flow rate of the high-density polyethylene is more than or equal to 8g/10min, and the test condition is 190 ℃/2.16kg; the melting point of the high-density polyethylene is more than or equal to 130 ℃;
the iodine absorption value of the superconducting carbon black is 950-1500mg/g, the oil absorption value is 300-460cc/100g, and the 325 mesh screen residue is less than 10ppm;
the nano carbon material comprises one of a graphene sheet, a single-walled carbon nanotube and a multi-walled carbon nanotube;
the antioxidant is at least one of antioxidant 445, antioxidant 1010, antioxidant 1035 and antioxidant 1330;
the anti-copper agent is at least one of an anti-copper agent MD1024, an anti-copper agent MD697, an anti-copper agent MB and tolyltriazole;
the lubricant is at least one of lubricant fluoride, silicone, EBS, polypropylene wax, polyethylene wax, calcium stearate and zinc stearate.
2. The method for preparing the high-temperature resistant strippable semiconductive polypropylene insulation shielding material as claimed in claim 1, which is characterized in that: the method comprises the following steps:
1) Weighing: accurately weighing various materials for standby according to a formula;
2) Mixing:
2.1 Firstly, mixing polypropylene, high-density polyethylene, modified ethylene-acrylic ester copolymer, antioxidant, copper inhibitor and lubricant in a stirrer for 10-15min, controlling the temperature at 60 ℃ and stirring speed at 40r/min to ensure that particles and powder are uniformly dispersed;
2.2 Using a reciprocating machine to produce, and 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 machine is as follows: 155+/-30 ℃ in the feeding section, 165+/-33 ℃ in the mixing section and 165+/-33 ℃ in the extruding section; the lower single screw temperature is: the temperature of the machine body is 155+/-30 ℃ and the temperature of the machine head is 160+/-32 ℃.
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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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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 |
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| 《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》.2001,249. * |
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