CN113754959A - Insulating material for cable and preparation method thereof - Google Patents
Insulating material for cable and preparation method thereof Download PDFInfo
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- CN113754959A CN113754959A CN202010488030.7A CN202010488030A CN113754959A CN 113754959 A CN113754959 A CN 113754959A CN 202010488030 A CN202010488030 A CN 202010488030A CN 113754959 A CN113754959 A CN 113754959A
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- insulating material
- base material
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- 239000011810 insulating material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000945 filler Substances 0.000 claims abstract description 25
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 18
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 18
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- -1 polyethylenes Polymers 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 5
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000523 sample Substances 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010998 test method Methods 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an insulating material for cables and a preparation method thereof, wherein the material is prepared from the following components in percentage by mass: 80-95% of base material and 5-20% of filler. The traditional ethylene propylene diene monomer is modified by doping low-density polyethylene with good tensile property, so that the tensile strength of the obtained material is greatly improved; meanwhile, the preparation method of the material is simple and feasible, and the industrial applicability is strong.
Description
Technical Field
The invention relates to the field of insulating materials, in particular to an insulating material for a cable and a preparation method thereof.
Background
With the rapid development of electric power construction, the insulating material cable is widely applied to the aspects of production, transportation, installation, recovery and the like due to the advantages of small volume, light weight, high working temperature, low maintenance cost and environmental protection. Ethylene propylene diene monomer has been used as an insulating material to a certain extent, but the traditional EPDM has high hardness and still has a large development space in cable application.
At present, a shore power cable is manually dragged to the shore from a ship and is manually connected to a shore power distribution box in the shore power system power supply, and the cable is manually wound when the ship leaves the port. The shore power cable is in the cold and hot cycle environment of alternative day and night and season for a long time, and bears the environment such as stretching and dragging for a long time, so that the challenges are provided for the mechanical property and the electrical property stability of the cable at different temperatures. In order to meet the working requirements of shore power cables, the mechanical properties, particularly the tensile strength, of ethylene propylene diene monomer are to be improved.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide an insulating material for cables, which has a high tensile strength, and a method for preparing the same.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides an insulating material for cables, which is improved in that the material is prepared from the following components in percentage by mass:
80-95% of base material and 5-20% of filler.
Preferably, the material is prepared from the following components in percentage by mass:
90-95% of base material and 10-20% of filler.
Preferably, the filler is low-density polyethylene or low-density polyethylene with the mass fraction being more than or equal to 80 percent and the ultra-low-density polyethylene has the melt flow rate of 0.15-0.25g/min and the density of 910-3A mixture of (a).
Preferably, the filler is ultra-clean low-density polyethylene or polyethylene mixture with molecular weight distribution of 5.2-6.3 and ash content of less than or equal to 100 ppm.
Preferably, the base material is ethylene propylene diene monomer rubber with the specific gravity of 0.870g/cm3Mooney viscosity 20MU, ethylene content 70.5 wt%, propylene content 29.0 wt%, ash content<0.1wt％。
The invention provides a method for preparing an insulating material for cables according to claim 1, the improvement comprising:
1) mixing the base material and the filler at 150 ℃ by a mixing roll with the rotating speed of 60 r/min;
2) cooling the mixed product obtained in the step 1) to room temperature to obtain the insulating material for the cable.
Compared with the closest prior art, the invention has the following beneficial effects:
(1) according to the material provided by the invention, the low-density polyethylene is doped to modify the traditional ethylene propylene diene monomer, so that the tensile strength of the obtained ethylene propylene diene monomer under the conditions of 30 ℃ and 30MPa to 50 ℃ and 27MPa is improved by 3 times compared with the traditional ethylene propylene diene monomer;
(2) the preparation method of mixing and cooling provided by the invention is simple and feasible, and has strong industrial applicability.
Drawings
FIG. 1 is a flow chart of a method for preparing an insulating material for cables according to the present invention;
FIG. 2 is a comparison of tests of examples provided by the present invention and comparative samples.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
The invention provides an insulating material for cables, which is prepared from the following components in percentage by mass:
95% of base material and 5% of filler.
In the present example, the filler is low density polyethylene or a mixture of low density polyethylene with a mass fraction of 80% or more and ultra-low density polyethylene, and has a melt flow rate of 0.15g/min and a density of 910g/m3。
In this example, the filler was an ultra-clean low density polyethylene or polyethylene blend having a molecular weight distribution of 5.2 and an ash content of 100ppm or less.
In this example, the base material is ethylene propylene diene monomer rubber with a specific gravity of 0.870g/cm3Mooney viscosity 20MU, ethylene content 70.5 wt%, propylene content 29.0 wt%, ash content<0.1wt％。
The present invention provides a method for preparing an insulating material for a cable according to claim 1, as shown in fig. 1, the method comprising:
1) mixing the base material and the filler at 150 ℃ by a mixing roll with the rotating speed of 60 r/min;
2) cooling the mixed product obtained in the step 1) to room temperature to obtain the insulating material for the cable.
Example 2
The invention provides an insulating material for cables, which is prepared from the following components in percentage by mass:
90% of base material and 10% of filler.
In the embodiment of the invention, the filler is low-density polyethylene or a mixture of low-density polyethylene with mass fraction being more than or equal to 80% and ultra-low-density polyethylene, the melt flow rate of the filler is 0.20g/min, and the density of the filler is 912g/m3。
In the examples of the invention, the filler is an ultra-clean low density polyethylene or polyethylene blend having a molecular weight distribution of 5.8 and an ash content of 100ppm or less.
In the embodiment of the invention, the base material is ethylene propylene diene monomer rubber with the specific gravity of 0.870g/cm3Mooney viscosity 20MU, ethylene content 70.5 wt%, propylene content 29.0 wt%, ash content<0.1wt％。
The present invention provides a method for preparing an insulating material for a cable according to claim 1, as shown in fig. 1, the method comprising:
1) mixing the base material and the filler at 150 ℃ by a mixing roll with the rotating speed of 60 r/min;
2) cooling the mixed product obtained in the step 1) to room temperature to obtain the insulating material for the cable.
Example 3
The invention provides an insulating material for cables, which is prepared from the following components in percentage by mass:
80% of base material and 20% of filler.
In the embodiment of the invention, the filler is low density polyethylene or low density polyethylene with mass fraction being more than or equal to 80% and ultralow density polyethyleneA blend of density polyethylenes having a melt flow rate of 0.25g/min and a density of 915g/m3。
In the examples of the invention, the filler is ultra-clean low density polyethylene or polyethylene blend with a molecular weight distribution of 6.3 and an ash content of 100ppm or less.
In the embodiment of the invention, the base material is ethylene propylene diene monomer rubber with the specific gravity of 0.870g/cm3Mooney viscosity 20MU, ethylene content 70.5 wt%, propylene content 29.0 wt%, ash content<0.1wt％。
The present invention provides a method for preparing an insulating material for a cable according to claim 1, as shown in fig. 1, the method comprising:
1) mixing the base material and the filler at 150 ℃ by a mixing roll with the rotating speed of 60 r/min;
2) cooling the mixed product obtained in the step 1) to room temperature to obtain the insulating material for the cable.
The following tests were carried out on the insulating materials for cables obtained in the above 3 examples:
step 1, preparing a sample of the insulating material prepared in the embodiment by a vulcanizing press, firstly melting the insulating material at 130 ℃ for 2 minutes, then raising the temperature to 160 ℃ and preserving the temperature for 10 minutes, then gradually lowering the temperature to about 120 ℃ under the condition of 5 tons of pressure to gradually solidify the insulating material and prevent bubbles from generating and gathering in the sample in the process, and then releasing the pressure of the sample and further cooling the sample to room temperature.
The test method adopts a three-electrode system which is independently developed according to the conductivity, the alternating current breakdown strength is tested according to the regulation of GB/T1408.2-2006, the tensile strength and the elongation are tested according to GB/T528-2009, and the tensile speed is 500 mm/min.
TABLE 1 compounding and test results for various examples and comparative samples
| (mass%) | Comparative sample | Example 1 | Example 2 | Example 3 |
| Ethylene propylene diene monomer | 100 | 95 | 90 | 80 |
| |
0 | 5 | 10 | 20 |
| Conductivity (S/m) at 30 DEG C | 2.60E-14 | 4.90E-14 | 6.60E-14 | 6.40E-14 |
| Conductivity (S/m) at 50 DEG C | 4.90E-14 | 5.30E-14 | 6.90E-14 | 7.70E-14 |
| 30 ℃ AC breakdown (kV/mm) | 42 | 42 | 41 | 38 |
| 50 ℃ AC breakdown (kV/mm) | 34 | 35 | 35 | 32 |
| Tensile Strength (MPa) at 30 DEG C | 11.1 | 12 | 16 | 30 |
| Tensile Strength (MPa) at 50 DEG C | 10.5 | 11.1 | 15.1 | 27 |
The data presented in table 1 show that the difference between the conductivities of the two objects at 30 ℃ and 50 ℃ is within an order of magnitude and is not large between the examples and the comparative samples; the difference of the alternating current breakdown field strengths of the embodiment and the comparative sample is within 10 percent, and the difference of the alternating current breakdown field strengths is not large; the tensile strengths of the examples of the invention are all greater than those of the comparative samples, the tensile strength is improved by the greatest amount of example 3, which is 3 times that of the comparative sample, as shown in fig. 2: 0% is a control sample; 20% of the insulating material is the insulating material of the invention in the embodiment 3, which shows that the tensile strength of the ethylene propylene diene monomer rubber is effectively improved by adopting the insulating material of the invention.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. An insulating material for cables is characterized by being prepared from the following components in percentage by mass:
80-95% of base material and 5-20% of filler.
2. The material according to claim 1, wherein the material is prepared from the following components in percentage by mass:
90-95% of base material and 10-20% of filler.
3. The material as claimed in claim 1, wherein the filler is low density polyethylene or low density polyethylene with a mass fraction of 80% or more and ultra-low density polyethylene having a melt flow rate of 0.15-0.25g/min and a density of 910-915g/m3A mixture of (a).
4. The material of claim 1, wherein the filler is ultra-clean low density polyethylene or a mixture of polyethylenes having a molecular weight distribution of 5.2 to 6.3 and an ash content of 100ppm or less.
5. The material of claim 1, wherein the base material is ethylene propylene diene monomer rubber having a specific gravity of 0.870g/cm3Mooney viscosity 20MU, ethylene content 70.5 wt%, propylene content 29.0 wt%, ash content<0.1wt％。
6. A method of preparing an insulation material for cables according to claim 1, comprising:
1) mixing the base material and the filler at 150 ℃ by a mixing roll with the rotating speed of 60 r/min;
2) cooling the mixed product obtained in the step 1) to room temperature to obtain the insulating material for the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488030.7A CN113754959A (en) | 2020-06-02 | 2020-06-02 | Insulating material for cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488030.7A CN113754959A (en) | 2020-06-02 | 2020-06-02 | Insulating material for cable and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113754959A true CN113754959A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010488030.7A Pending CN113754959A (en) | 2020-06-02 | 2020-06-02 | Insulating material for cable and preparation method thereof |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116478481A (en) * | 2023-04-23 | 2023-07-25 | 国网湖南省电力有限公司 | Ethylene propylene rubber insulating material regulated and controlled by low-density polyethylene, and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705426A (en) * | 2018-11-02 | 2019-05-03 | 常州八益电缆股份有限公司 | Nuclear island inner cable Halogen interior insulation material, cable inner insulating layer and preparation method thereof |
-
2020
- 2020-06-02 CN CN202010488030.7A patent/CN113754959A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705426A (en) * | 2018-11-02 | 2019-05-03 | 常州八益电缆股份有限公司 | Nuclear island inner cable Halogen interior insulation material, cable inner insulating layer and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116478481A (en) * | 2023-04-23 | 2023-07-25 | 国网湖南省电力有限公司 | Ethylene propylene rubber insulating material regulated and controlled by low-density polyethylene, and preparation method and application thereof |
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