CN113999457A - Polypropylene-based insulating material for environment-friendly cable and preparation method thereof - Google Patents
Polypropylene-based insulating material for environment-friendly cable and preparation method thereof Download PDFInfo
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- CN113999457A CN113999457A CN202111458470.9A CN202111458470A CN113999457A CN 113999457 A CN113999457 A CN 113999457A CN 202111458470 A CN202111458470 A CN 202111458470A CN 113999457 A CN113999457 A CN 113999457A
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- -1 Polypropylene Polymers 0.000 title claims abstract description 77
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 77
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 76
- 239000011810 insulating material Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims abstract description 33
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 32
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000012774 insulation material Substances 0.000 claims abstract description 10
- 238000005303 weighing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 13
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
- 239000005977 Ethylene Substances 0.000 claims description 7
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 7
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 7
- 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 group 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 description 3
- 239000000463 material Substances 0.000 abstract description 14
- 238000009413 insulation Methods 0.000 abstract description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 abstract description 7
- 239000000945 filler Substances 0.000 abstract description 4
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 229920006124 polyolefin elastomer Polymers 0.000 description 10
- 238000004132 cross linking Methods 0.000 description 9
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000004703 cross-linked polyethylene Substances 0.000 description 6
- 229920003020 cross-linked polyethylene Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 229920005629 polypropylene homopolymer Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 229920000428 triblock copolymer Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
A polypropylene-based insulating material for an environment-friendly cable and a preparation method thereof relate to a cable insulating material and a preparation method thereof. The cable with the polypropylene insulation material aims to solve the problem that the stability of an insulation structure of a cable made of the polypropylene insulation material is poor. The polypropylene-based insulating material has excellent heat-resistant stability, electrical property and mechanical property. The polypropylene-based insulating material for the environment-friendly cable is prepared from polypropylene, SEBS, a main antioxidant and an auxiliary antioxidant; the preparation method comprises the following steps: weighing polypropylene, SEBS, a main antioxidant and an auxiliary antioxidant as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material. The styrene-butadiene block copolymer adopted by the invention is used as the flexibility-increasing modified filler, and the prepared material has excellent mechanical property and thermal property, thereby ensuring the stability of the insulating structure. The invention is suitable for preparing the cable insulating material.
Description
Technical Field
The invention relates to a cable insulating material and a preparation method thereof.
Background
The polymer insulated power cable is developed through natural rubber, polyvinyl chloride, ethylene propylene rubber, polyethylene, crosslinked polyethylene, polypropylene cable and other stages. Among them, thermosetting cables represented by crosslinked polyethylene have been most widely used and commercially accepted in high-voltage cables. The crosslinking can make polymer macromolecules form a three-dimensional network structure, and the heat resistance of the material is obviously improved. After the low-density polyethylene is crosslinked, the long-term use temperature can be raised to 90 ℃ from the original 70 ℃, the maximum short-circuit 5s tolerance temperature is raised to 250 ℃ from 130 ℃, and the crosslinking greatly improves the current-carrying capacity and the stability of a power transmission line of the cable, so that the crosslinked polyethylene insulated power cable is developed rapidly and replaces a thermoplastic insulated cable gradually. In recent years, with the energy shortage and the increased environmental protection pressure, the thermoplastic cable draws attention again due to its natural energy-saving and environmental protection characteristics. With the proposition and the promotion of 'carbon peak reaching' and 'carbon neutralization', the power cable manufacturing industry faces a revolution. The aim of 'double carbon' is to promote the construction of a low-carbon, clean, reliable, efficient and advanced high-voltage power cable manufacturing system, but the traditional crosslinked polyethylene cable has the problems of high energy consumption, long processing period and the like in production and manufacturing, and cannot be recycled after the service life of the cable is reached, so that the 'double carbon' concept is contrary. In order to solve the problems, cable insulating materials capable of replacing crosslinked polyethylene are long sought at home and abroad, and finally, research targets are focused on polypropylene materials.
The polypropylene insulating material has the advantages of excellent insulating property, no need of crosslinking, capability of being melted and recycled and the like, and has excellent insulating and heat-resistant properties which are comparable to those of crosslinked polyethylene. However, the thermoplastic polypropylene material has high elastic modulus and high rigidity, is not suitable for the application of cables, and must be subjected to flexibility increasing modification. At present, polypropylene and polyolefin elastomer (POE) are blended and modified, so that the modulus of the material is reduced, the rigidity is reduced, and the flexibility is increased on the premise of not losing heat resistance, so that the material is suitable for cable insulation manufacture and use. However, the application of POE to the manufacture of polypropylene insulated cables has a problem that the normal working temperature of polypropylene cables is 110 ℃, but the softening and melting temperature of POE is very low, and the melting temperature of POE8450 of the american dow chemical ENGAGE series is 97 ℃, which is known to be the POE product with the highest melting temperature. This means that if POE is used to make polypropylene cables, the POE phase in the polypropylene insulation is in a molten state when the cable is operated at 110 ℃, which can destroy the insulation structural stability, resulting in breakdown and insulation damage.
Disclosure of Invention
The invention aims to solve the problem of poor stability of an insulation structure of a polypropylene insulation material cable, and provides a polypropylene-based insulation material for an environment-friendly cable and a preparation method thereof. The polypropylene-based insulating material has excellent heat-resistant stability, electrical property and mechanical property.
The polypropylene-based insulating material for the environment-friendly cable is prepared from 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant;
the preparation method of the polypropylene-based insulating material for the environment-friendly cable comprises the following steps:
weighing 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain a polypropylene-based insulating material;
the melt blending process comprises the following steps: the temperature is 180-220 ℃, the time is 5-15 minutes, and the rotating speed is 60-70 r/min;
the homopolymerized propylene is homopolymerized polypropylene;
the mass fraction of the ethylene phase in the homopolymerized polypropylene is 10-30 percent;
the main antioxidant is antioxidant 1010, antioxidant 1035 or antioxidant 300;
the auxiliary antioxidant is antioxidant 168;
the principle and the beneficial effects of the invention are as follows:
the styrene-butadiene block copolymer (SEBS) adopted by the invention is a linear triblock copolymer, the SEBS has stable structure depending on the physical crosslinking point of a styrene section, the middle butadiene section provides softness, and the SEBS has high melting temperature of more than 120 ℃ and low elastic modulus and can meet the use requirement of a polypropylene cable at 110 ℃. According to the invention, styrene-butadiene block copolymer (SEBS) is used as a flexibility-increasing modified filler to replace POE, a polystyrene chain segment existing in the SEBS can form a physical crosslinking network, so that the material has a better toughening effect, the melting temperature of the SEBS is higher and reaches above 120 ℃, and the SEBS does not melt at a long-term working temperature, so that the prepared material has excellent mechanical properties and thermal properties, and the stability of an insulation structure is ensured.
Drawings
FIG. 1 is a crystal melting temperature curve diagram of polypropylene-based insulation for eco-friendly cables prepared in examples 1 to 3.
Detailed Description
The technical scheme of the invention is not limited to the specific embodiments listed below, and any reasonable combination of the specific embodiments is included.
The first embodiment is as follows: the polypropylene-based insulating material for the environment-friendly cable is prepared from 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant.
The styrene-butadiene block copolymer (SEBS) adopted by the embodiment is a linear triblock copolymer, the SEBS has stable structure depending on the physical crosslinking point of a styrene section, the middle butadiene section provides softness, and the SEBS has high melting temperature and low elastic modulus of more than 120 ℃ and can meet the use requirement of a polypropylene cable at 110 ℃. According to the invention, styrene-butadiene block copolymer (SEBS) is used as a flexibility-increasing modified filler to replace POE, a polystyrene chain segment existing in the SEBS can form a physical crosslinking network, so that the material has a better toughening effect, the melting temperature of the SEBS is higher and reaches above 120 ℃, and the SEBS does not melt at a long-term working temperature, so that the prepared material has excellent mechanical properties and thermal properties, and the stability of an insulation structure is ensured.
The second embodiment is as follows: the preparation method of the polypropylene-based insulating material for the environment-friendly cable comprises the following steps:
weighing 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material.
The styrene-butadiene block copolymer (SEBS) adopted by the embodiment is a linear triblock copolymer, the SEBS has stable structure depending on the physical crosslinking point of a styrene section, the middle butadiene section provides softness, and the SEBS has high melting temperature and low elastic modulus of more than 120 ℃ and can meet the use requirement of a polypropylene cable at 110 ℃. According to the invention, styrene-butadiene block copolymer (SEBS) is used as a flexibility-increasing modified filler to replace POE, a polystyrene chain segment existing in the SEBS can form a physical crosslinking network, so that the material has a better toughening effect, the melting temperature of the SEBS is higher and reaches above 120 ℃, and the SEBS does not melt at a long-term working temperature, so that the prepared material has excellent mechanical properties and thermal properties, and the stability of an insulation structure is ensured.
The third concrete implementation mode: the second embodiment is different from the first embodiment in that: the melt blending process comprises the following steps: the temperature is 180-220 ℃, the time is 5-15 minutes, and the rotating speed is 60-70 r/min.
The fourth concrete implementation mode: the second embodiment is different from the first embodiment in that: the homopolymerized propylene is homopolymerized polypropylene.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that: the mass fraction of the ethylene phase in the homopolymerized polypropylene is 10-30%.
The sixth specific implementation mode: the second embodiment is different from the first embodiment in that: the main antioxidant is antioxidant 1010, antioxidant 1035 or antioxidant 300.
The seventh embodiment: the second embodiment is different from the first embodiment in that: the auxiliary antioxidant is antioxidant 168.
Example 1:
the preparation method of the polypropylene-based insulating material for the environment-friendly cable of the embodiment comprises the following steps: weighing 85 parts of polypropylene, 15 parts of SEBS, 1 part of main antioxidant 1035 and 1 part of auxiliary antioxidant 168 as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material. The melt blending process comprises the following steps: the temperature is 200 ℃, the time is 10 minutes, and the rotating speed is 65 r/min; the homopolymerized propylene is homopolymerized polypropylene; the mass fraction of the ethylene phase in the homo-polypropylene is 20%.
Example 2:
the preparation method of the polypropylene-based insulating material for the environment-friendly cable of the embodiment comprises the following steps: weighing 75 parts of polypropylene, 25 parts of SEBS, 1 part of main antioxidant 1035 and 1 part of auxiliary antioxidant 168 as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material. The melt blending process comprises the following steps: the temperature is 200 ℃, the time is 10 minutes, and the rotating speed is 65 r/min; the homopolymerized propylene is homopolymerized polypropylene; the mass fraction of the ethylene phase in the homo-polypropylene is 20%.
Example 3:
the preparation method of the polypropylene-based insulating material for the environment-friendly cable of the embodiment comprises the following steps: weighing 70 parts of polypropylene, 30 parts of SEBS, 1 part of main antioxidant 1035 and 1 part of auxiliary antioxidant 168 as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material. The melt blending process comprises the following steps: the temperature is 200 ℃, the time is 10 minutes, and the rotating speed is 65 r/min; the homopolymerized propylene is homopolymerized polypropylene; the mass fraction of the ethylene phase in the homo-polypropylene is 20%.
DSC is used for testing the crystal melting temperature, LDPE (low density polyethylene) and PP (polypropylene) are used for comparison, figure 1 is a crystal melting temperature curve diagram of the polypropylene-based insulating material for the environment-friendly cable prepared in the examples 1-3, and curves 1, 2 and 3 in the figure respectively correspond to the examples 1, 2 and 3 in sequence. It can be seen that the polypropylene-based insulating material for the environment-friendly cable prepared in examples 1-3 has only one melting peak, appears at 165 ℃, and has excellent heat resistance.
Example 4:
the preparation method of the polypropylene-based insulating material for the environment-friendly cable of the embodiment comprises the following steps: weighing 60 parts of polypropylene, 40 parts of SEBS, 1 part of main antioxidant 1035 and 1 part of auxiliary antioxidant 168 as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material. The melt blending process comprises the following steps: the temperature is 200 ℃, the time is 10 minutes, and the rotating speed is 65 r/min; the homopolymerized propylene is homopolymerized polypropylene; the mass fraction of the ethylene phase in the homo-polypropylene is 20%.
The polypropylene-based insulating material prepared in example 4 is subjected to resistance performance, mechanical performance test and elastic modulus test based on JB/T10738-2007, GB/T12706-2020 and IEC60840-2020 as standard requirements, and the test results are summarized as shown in Table 1. The results in table 1 show that the material has both mechanical and electrical properties meeting the standard requirements. Results of thermal extension test of polypropylene-based insulation prepared in example 4 are already available for polypropylene materials.
TABLE 1
Claims (7)
1. A polypropylene-based insulating material for environment-friendly cables is characterized in that: the polypropylene-based insulating material for the environment-friendly cable is prepared from 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant.
2. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 1, wherein: the preparation method of the polypropylene-based insulating material for the environment-friendly cable comprises the following steps:
weighing 40-85 parts of polypropylene, 15-60 parts of SEBS, 0.5-2 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant as raw materials, and placing the raw materials in an internal mixer for melt blending to obtain the polypropylene-based insulating material.
3. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 2, wherein: the melt blending process comprises the following steps: the temperature is 180-220 ℃, the time is 5-15 minutes, and the rotating speed is 60-70 r/min.
4. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 2, wherein: the homopolymerized propylene is homopolymerized polypropylene.
5. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 4, wherein: the mass fraction of the ethylene phase in the homopolymerized polypropylene is 10-30%.
6. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 2, wherein: the main antioxidant is antioxidant 1010, antioxidant 1035 or antioxidant 300.
7. The method for preparing a polypropylene-based insulation material for an eco-friendly cable according to claim 2, wherein: the auxiliary antioxidant is antioxidant 168.
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| CN202111458470.9A CN113999457A (en) | 2021-12-01 | 2021-12-01 | Polypropylene-based insulating material for environment-friendly cable and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108794897A (en) * | 2018-05-30 | 2018-11-13 | 上海交通大学 | A kind of polypropylene-base high-voltage cable insulating layer material and preparation method thereof |
| CN110452468A (en) * | 2019-09-25 | 2019-11-15 | 江苏中天科技股份有限公司 | A kind of thermoplastic cable Insulation Material and preparation method thereof |
| CN113444320A (en) * | 2021-05-27 | 2021-09-28 | 浙江万马高分子材料集团有限公司 | Cable insulation material and preparation method and application thereof |
| CN113698723A (en) * | 2021-09-30 | 2021-11-26 | 国网黑龙江省电力有限公司电力科学研究院 | Polypropylene-based thermoplastic semiconductive shielding material for environment-friendly cable and preparation method thereof |
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- 2021-12-01 CN CN202111458470.9A patent/CN113999457A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108794897A (en) * | 2018-05-30 | 2018-11-13 | 上海交通大学 | A kind of polypropylene-base high-voltage cable insulating layer material and preparation method thereof |
| CN110452468A (en) * | 2019-09-25 | 2019-11-15 | 江苏中天科技股份有限公司 | A kind of thermoplastic cable Insulation Material and preparation method thereof |
| CN113444320A (en) * | 2021-05-27 | 2021-09-28 | 浙江万马高分子材料集团有限公司 | Cable insulation material and preparation method and application thereof |
| CN113698723A (en) * | 2021-09-30 | 2021-11-26 | 国网黑龙江省电力有限公司电力科学研究院 | Polypropylene-based thermoplastic semiconductive shielding material for environment-friendly cable and preparation method thereof |
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Application publication date: 20220201 |