CN117467214A - Strippable polypropylene outer shielding material for power cable and preparation method thereof - Google Patents
Strippable polypropylene outer shielding material for power cable and preparation method thereof Download PDFInfo
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- CN117467214A CN117467214A CN202211035508.6A CN202211035508A CN117467214A CN 117467214 A CN117467214 A CN 117467214A CN 202211035508 A CN202211035508 A CN 202211035508A CN 117467214 A CN117467214 A CN 117467214A
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- strippable
- polypropylene
- power cable
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- -1 polypropylene Polymers 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 60
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 48
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 29
- 239000011347 resin Substances 0.000 claims abstract description 29
- 239000006229 carbon black Substances 0.000 claims abstract description 19
- 239000003607 modifier Substances 0.000 claims abstract description 16
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 13
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 239000012752 auxiliary agent Substances 0.000 claims description 12
- 229920005672 polyolefin resin Polymers 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003508 Dilauryl thiodipropionate Substances 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 235000019359 magnesium stearate Nutrition 0.000 claims description 3
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 3
- 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
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 229910052909 inorganic silicate Inorganic materials 0.000 claims description 2
- 239000002952 polymeric resin Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920003002 synthetic resin Polymers 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
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims 1
- 239000006057 Non-nutritive feed additive Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229920003020 cross-linked polyethylene Polymers 0.000 description 5
- 239000004703 cross-linked polyethylene Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 238000011056 performance test Methods 0.000 description 3
- 239000011243 crosslinked material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 238000004064 recycling Methods 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- 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
The invention discloses a strippable polypropylene external shielding material for a power cable and a preparation method thereof, wherein the shielding material comprises the following raw materials in parts by weight: 50 parts of polypropylene resin, 35-50 parts of special resin, 1.0-3.0 parts of lubricant, 0.5-1.0 parts of antioxidant, 30-40 parts of superconducting carbon black, 2.0-4.0 parts of self-made modifier and 5-10 parts of self-made strippable agent. The invention takes the polypropylene resin with excellent performance as a base material, and is assisted with the modifier, the processing aid and the like, the material has very good extrusion processing performance, the prepared shielding material has excellent conductivity, is completely environment-friendly, has fine extrusion surface, has very good mechanical performance and good stripping performance, and is suitable for stable and efficient extrusion of the outer shielding layer of the polypropylene insulated cable.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a strippable polypropylene outer shielding material for a power cable and a preparation method thereof.
Background
Along with the continuous promotion of modern construction in China, the demand for electric power energy is continuously increased, and the demand for electric power cables is also rapidly increased. The cable industry in China is gradually developed and will continue to grow at a high speed. China has become the biggest cable consumer market in the world, especially in the field of power cables. However, due to the particularity of the power cable, the insulated cable is mainly formed by adopting cross-linked polyethylene as a base material and assisting in cross-linked polyolefin shielding co-extrusion, and has the advantages of stable performance, mature matching and controllable process, and the defects that the cross-linked technology is adopted, once formed, the cross-linked polyethylene cannot be reused and is difficult to recycle, once scrapped, the cross-linked polyethylene is directly used as plastic garbage, and once scrapped, the cross-linked polyethylene is difficult to degrade and can only be burnt and the like, thus the cross-linked polyethylene cable belongs to an environment-friendly material. Therefore, the development of a novel non-crosslinked inner shielding material for the power cable is particularly important to effectively avoid the embarrassment of difficult treatment of crosslinked materials, improve the secondary recycling of the materials and effectively save energy. Meanwhile, the competitiveness and brand value of the cable enterprises can be remarkably improved. . So to change this gradually, it must be considered to choose the non-crosslinked material instead. In addition, none of the outer shields in the current commercial power cable products is strippable. In consideration of actual demands of cable insulation production, if the outer shielding of the cable insulation is stripped, construction can be greatly facilitated, and otherwise, construction difficulty and time can be increased for quick and convenient cable construction and laying processes.
Disclosure of Invention
In order to solve the problems, the invention provides the strippable polypropylene outer shielding material for the power cable and the preparation method thereof, wherein polypropylene resin is used as a base material, and a modifier, a processing aid and the like are used as auxiliary materials.
The invention adopts the following technical scheme:
the strippable polypropylene outer shielding material for the power cable is prepared from the following raw materials in parts by weight: 50 parts of polypropylene resin, 35-50 parts of special resin, 1.0-3.0 parts of lubricant, 0.5-1.0 parts of antioxidant, 30-40 parts of superconducting carbon black, 2.0-4.0 parts of self-made modifier and 5-10 parts of self-made strippable agent.
The melt index of the polypropylene resin is less than or equal to 5g/10min.
The special resin is special high-toughness polymer resin.
The lubricant is one or more of magnesium stearate, calcium stearate, zinc stearate and polyethylene wax; the superconducting carbon black is superconducting superfine nanoscale carbon black powder.
The antioxidant is a combination of dilauryl thiodipropionate, polybasic hindered phenol and tri (2, 4-di-tert-butyl) phenyl phosphite.
The self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents.
The special auxiliary agent is one or a combination of a plurality of dimethyl siloxane, octamethyl cyclotetrasiloxane and propyl trimethoxy silane in the organic silicone in any proportion.
The self-made strippable agent is prepared by taking polyolefin resin as a base material and adding special filler.
The special filler is one or the combination of more of calcium carbonate, clay, talcum powder and inorganic silicate in any proportion.
The preparation method of the strippable polypropylene outer shielding material for the power cable comprises the following steps:
s1, mixing all raw material components weighed according to the weight of a formula, and then putting the mixture into a high-speed mixer for uniform mixing to obtain a mixture;
and S2, extruding, granulating and drying the uniformly mixed mixture through a double-screw extruder to obtain the strippable polypropylene outer shielding material for the power cable.
The mixing temperature of the raw materials in the step S1 in a high-speed mixer is 30-75 ℃, and the mixing time is 3-20min.
The extrusion temperature of the mixture in the step S2 in the double-screw extruder is 145-195 ℃; the drying temperature of the granules is 70-85 ℃ and the drying time is 1-3h.
The application of a strippable polypropylene outer shielding material for a power cable in preparing an outer shielding layer of the power cable.
The technical scheme of the invention has the following advantages:
the invention takes the polyolefin resin with excellent performance as a base material and is assisted with the modifier, the processing aid and the like, the material has very good extrusion processing performance, excellent conductivity, complete environmental protection, fine extrusion surface, very good mechanical performance and good stripping performance, and is suitable for extrusion of the outer shielding layer of the polypropylene insulated cable. In addition, the preparation process is simple, the equipment investment is small, the efficiency is high, and the cost is low.
Detailed Description
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the embodiment provides a strippable polypropylene external shielding material for a power cable, wherein in a shielding material formula, the names of components and the weight parts of the components are as follows:
50 parts of polypropylene resin, 35 parts of special resin, 2.0 parts of lubricant, 0.5 part of antioxidant, 30 parts of superconducting carbon black, 2.0 parts of self-made modifier and 5 parts of self-made strippable agent.
Wherein the melt index of the polypropylene resin is 3g/10min, and the special resin is ethylene-vinyl acetate copolymer; the self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents, wherein the special auxiliary agents are dimethyl siloxane; the self-made strippable agent is prepared by taking polyolefin resin as a base material and adding special filler calcium carbonate; the lubricant is polyethylene wax (imported polyethylene wax is selected in this example); the antioxidant is dilauryl thiodipropionate, polybasic hindered phenol and tri (2, 4-di-tert-butyl) phenyl phosphite according to the mass ratio of 1:1:1, wherein the superconducting carbon black is superconducting superfine nanoscale carbon black powder.
The preparation method comprises the following steps:
s1, mixing all raw material components weighed according to the weight of a formula, and then putting the mixture into a high-speed mixer to be mixed uniformly, wherein the mixing temperature is 30-75 ℃, and the mixing time is 15min, so as to obtain a mixture;
s2, placing the uniformly mixed mixture into a double-screw extruder, extruding and granulating at 145-195 ℃, and then drying at 80 ℃ for 2 hours to obtain the polypropylene inner shielding material for the power cable.
Example 2:
the embodiment provides a polypropylene inner shielding material for a power cable, wherein in a sheath material formula, the names of all components and the weight parts of all components are as follows:
50 parts of polypropylene resin, 43 parts of special resin, 1 part of lubricant, 0.7 part of antioxidant, 35 parts of superconducting carbon black, 3 parts of self-made modifier and 7 parts of self-made strippable agent.
The melt index of the polypropylene resin is 3g/10min, and the special resin is special polyethylene resin; the self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents, wherein the special auxiliary agents are the combination of dimethyl siloxane and octamethyl cyclotetrasiloxane; the self-made strippable agent is prepared by taking polyolefin resin as a base material and adding clay; the lubricant is polyethylene wax (imported polyethylene wax is selected in this example); the antioxidant is dilauryl thiodipropionate, polybasic hindered phenol and tri (2, 4-di-tert-butyl) phenyl phosphite according to the mass ratio of 1:2:2, wherein the superconducting carbon black is superconducting superfine nanoscale carbon black powder. The preparation method comprises the following steps:
s1, mixing all raw material components weighed according to the weight of a formula, and then putting the mixture into a high-speed mixer to be mixed uniformly, wherein the mixing temperature is 30-75 ℃, and the mixing time is 15min, so as to obtain a mixture;
s2, placing the uniformly mixed mixture into a double-screw extruder, extruding and granulating at 145-195 ℃, and then drying at 80 ℃ for 2 hours to obtain the strippable polypropylene outer shielding material for the power cable.
Example 3:
the embodiment provides a polypropylene inner shielding material for a power cable, wherein in a sheath material formula, the names of all components and the weight parts of all components are as follows:
50 parts of polypropylene resin, 50 parts of special resin, 3.0 parts of lubricant, 1.0 part of antioxidant, 40 parts of superconducting carbon black, 4.0 parts of self-made modifier and 10 parts of self-made strippable agent.
The melt index of the polypropylene resin is 3g/10min, and the special resin is a polyolefin elastomer; the self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents, wherein the special auxiliary agents are propyl trimethoxy silane; the self-made strippable agent is prepared by taking polyolefin resin as a base material and adding talcum powder as a special filler; the lubricant is magnesium stearate; the antioxidant is dilauryl thiodipropionate, polybasic hindered phenol and tri (2, 4-di-tert-butyl) phenyl phosphite according to the mass ratio of 1:3:3, wherein the superconducting carbon black is superconducting superfine nanoscale carbon black powder.
The preparation method comprises the following steps:
s1, mixing all raw material components weighed according to the weight of a formula, and then putting the mixture into a high-speed mixer to be mixed uniformly, wherein the mixing temperature is 30-75 ℃, and the mixing time is 20min, so as to obtain a mixture;
s2, placing the uniformly mixed mixture into a double-screw extruder, extruding and granulating at 145-195 ℃, and then drying at 70 ℃ for 3 hours to obtain the strippable polypropylene outer shielding material for the power cable.
Comparative example 1:
the mixing, extrusion granulation and other processes are the same as in example 1, and the names and the weight parts of the components are as follows:
50 parts of polypropylene resin, 43 parts of special resin, 1 part of lubricant, 0.7 part of antioxidant, 35 parts of superconducting carbon black and 3 parts of self-made modifier.
Wherein the melt index of the polypropylene resin is 3g/10min, and the special resin is special polyethylene resin; the self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents, wherein the special auxiliary agents are the combination of dimethyl siloxane and octamethyl cyclotetrasiloxane; the lubricant is polyethylene wax (imported polyethylene wax is selected in this example); the antioxidant is dilauryl thiodipropionate, polybasic hindered phenol and tri (2, 4-di-tert-butyl) phenyl phosphite according to the mass ratio of 1:2:2, wherein the superconducting carbon black is superconducting superfine nanoscale carbon black powder.
The polypropylene shield material prepared in the same manner as described above was difficult to peel off as a comparative example.
Performance test:
the polypropylene inner shield materials for power cables prepared according to the proportions of examples 1 to 3 and comparative example 1 were subjected to performance tests according to the relevant standards, respectively, and the relevant performance results of the prepared cable materials are shown in table 1.
TABLE 1 test results of the cable Material Performance test prepared in examples 1-3 and comparative example 1
| Test item | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Conductivity (omega cm) | 75 | 46 | 25 | 53 |
| Tensile Strength (MPa) | 18.4 | 16.3 | 15.5 | 16.9 |
| Elongation at break (%) | 580 | 560 | 490 | 550 |
| Surface finish | Fine and smooth | Fine and smooth | Fine and smooth | Fine and smooth |
| Peel strength N/m | 59 | 56 | 49 | Can not be peeled off |
As can be seen from Table 1, the polypropylene outer shielding material for power cables prepared in the above examples 1-3 has excellent comprehensive properties after the polypropylene resin with excellent properties is selected as a base material and modified, and the prepared cable material has excellent extrusion processability and strippable properties, has excellent mechanical properties and conductivity, can be effectively applied to the power cable outer shielding layer, can effectively avoid side effects caused by crosslinking, and has positive significance in improving the awareness of products, social benefits, economic benefits and the like of enterprises. And in the comparative example 1, the material is difficult to strip in the construction process, so that the on-site construction is not facilitated, and the production efficiency of construction enterprises is reduced.
In conclusion, the polypropylene outer shielding material for the power cable has good comprehensive performance and good stripping performance, effectively overcomes various defects in the prior art, has a simple preparation process, small equipment investment, high efficiency and low cost, and has higher industrial utilization value.
The invention is applicable to the prior art where nothing is said.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present invention.
Claims (10)
1. The strippable polypropylene outer shielding material for the power cable is characterized by being prepared from the following raw materials in parts by weight:
50 parts of polypropylene resin, 35-50 parts of special resin and 1.0-3.0 parts of lubricant
0.5-1.0 part of antioxidant, 30-40 parts of superconducting carbon black, 2.0-4.0 parts of self-made modifier and 5-10 parts of self-made strippable agent.
2. The strippable polypropylene outer shield material for a power cable according to claim 1, wherein the polypropylene resin melt index is 5g/10min or less; the special resin is special high-toughness polymer resin.
3. The strippable polypropylene outer shield material for a power cable according to claim 1, wherein the lubricant is one or more of magnesium stearate, calcium stearate, zinc stearate, polyethylene wax; the superconducting carbon black is superconducting superfine nanoscale carbon black powder.
4. The strippable polypropylene outer shield material for power cables according to claim 1, wherein the antioxidant is a combination of dilauryl thiodipropionate, polyhydric hindered phenol and phenyl tri (2, 4-di-tert-butyl) phosphite in a mass ratio of 1 (1-3).
5. The strippable polypropylene outer shield material for power cables according to claim 1, wherein the self-made modifier is prepared by taking polyolefin resin as a base material and adding special auxiliary agents.
6. The strippable polypropylene outer shield material according to claim 5, wherein the special auxiliary agent is one or more of dimethyl siloxane, octamethyl cyclotetrasiloxane and propyl trimethoxy silane in organic silicone.
7. The strippable polypropylene outer shield material for power cables according to claim 1, wherein the self-made strippable agent is prepared by taking polyolefin resin as a base material and adding special filler; the special filler is one or a combination of more of calcium carbonate, clay, talcum powder and inorganic silicate.
8. A method for preparing the strippable polypropylene outer shield material for a power cable according to any one of claims 1 to 7, comprising the steps of:
s1, mixing all raw material components weighed according to the weight of a formula, and then putting the mixture into a high-speed mixer for uniform mixing to obtain a mixture;
and S2, extruding, granulating and drying the uniformly mixed mixture through a double-screw extruder to obtain the polypropylene external shielding material for the power cable.
9. The preparation method according to claim 7, wherein the mixing temperature of the raw materials in the step S1 in the high-speed mixer is 30-75 ℃ and the mixing time is 3-20min;
the extrusion temperature of the mixture in the step S2 in the double-screw extruder is 145-195 ℃; the drying temperature of the granules is 70-85 ℃ and the drying time is 1-3h.
10. Use of a strippable polypropylene outer shield for a power cable according to any one of claims 1 to 7 in the preparation of a polypropylene insulation cable outer shield.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022108604818 | 2022-07-21 | ||
| CN202210860481 | 2022-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117467214A true CN117467214A (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211035508.6A Pending CN117467214A (en) | 2022-07-21 | 2022-08-26 | Strippable polypropylene outer shielding material for power cable and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117467214A (en) |
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- 2022-08-26 CN CN202211035508.6A patent/CN117467214A/en active Pending
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