CN115991901B - Rubber jacketed cable and preparation method of cable jacket thereof - Google Patents
Rubber jacketed cable and preparation method of cable jacket thereof Download PDFInfo
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- CN115991901B CN115991901B CN202310254532.7A CN202310254532A CN115991901B CN 115991901 B CN115991901 B CN 115991901B CN 202310254532 A CN202310254532 A CN 202310254532A CN 115991901 B CN115991901 B CN 115991901B
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- 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
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Abstract
The invention relates to the technical field of cable insulation materials, and provides a rubber jacketed cable and a preparation method of a cable jacket of the rubber jacketed cable. The cable sheath comprises the following components in parts by weight: 100 parts of natural rubber, 4-6 parts of vulcanizing agent, 1-3 parts of accelerator, 2-4 parts of active agent, 4-8 parts of anti-aging agent, 1.5-4.5 parts of compatibilizer, 2-4 parts of lubricant, 20-30 parts of flame retardant and 40-50 parts of reinforcing agent, wherein the compatibilizer is 4- (dihydroxymethylsilyl) butyronitrile; the preparation method of the cable sheath comprises the steps of mixing the raw materials in parts by weight, and vulcanizing to obtain the cable sheath; the rubber jacketed cable is also provided, and the cable sheath layer is the cable sheath. By the technical scheme, the problems of poor ageing resistance or poor mechanical properties of the natural rubber composite material in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of cable insulation materials, in particular to a rubber jacketed cable and a preparation method of a cable jacket thereof.
Background
In recent years, with the rapid development of Chinese economy, energy supply is becoming more and more intense. In order to meet the energy demand of the market, each large coal mine adopts high-power coal mining equipment to improve the productivity, the demand of a cable matched with the large coal mine for transmitting power is continuously improved, and natural rubber is one of materials which are originally applied to insulated cables.
Natural Rubber (NR) is a renewable resource and has excellent comprehensive mechanical properties such as high strength, high elasticity, high insulation, tear resistance and the like, but the unaddressed property is a fatal weakness of natural rubber.
The addition of the anti-aging agent is beneficial to improving the anti-aging performance of the natural rubber, and meanwhile, the compatibility of the anti-aging agent and the rubber directly influences the movement, the distribution and the maximum usage amount of the anti-aging agent in a rubber matrix, so that the protection effect, particularly the long-acting protection effect, of the anti-aging agent on the rubber in the thermal aging process is influenced, and the mechanical property of the composite material is also influenced. Therefore, when the compatibility of the anti-aging agent and the rubber is poor, the addition of the anti-aging agent can improve the anti-aging performance of the rubber, but the anti-aging agent cannot achieve the optimal effect, and in addition, the mechanical property of the composite material can be greatly reduced. At present, how to prepare a natural rubber composite material with good ageing resistance and good mechanical property is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The invention provides a rubber jacketed cable and a preparation method of a cable jacket thereof, which solve the problems of poor ageing resistance or poor mechanical property of a natural rubber composite material in the related technology.
The technical scheme of the invention is as follows:
the cable sheath comprises the following components in parts by weight: 100 parts of natural rubber, 4-6 parts of vulcanizing agent, 1-3 parts of accelerator, 2-4 parts of active agent, 4-8 parts of anti-aging agent, 1.5-4.5 parts of compatibilizer, 2-4 parts of lubricant, 20-30 parts of flame retardant and 40-50 parts of reinforcing agent, wherein the compatibilizer is 4- (dihydroxymethylsilyl) butyronitrile.
CAS number of 4- (dihydroxymethylsilane) butyronitrile: 18293-49-7.
As a further technical scheme, the natural rubber is epoxidized natural rubber.
As a further technical scheme, the anti-aging agent is an amine anti-aging agent.
As a further technical scheme, the amine anti-aging agent comprises an anti-aging agent 4010, an anti-aging agent 4020 and an anti-aging agent 224.
As a further technical scheme, the mass ratio of the anti-aging agent to the compatibilizer is 2:0.5-1.5.
As a further technical scheme, the mass ratio of the anti-aging agent to the compatibilizer is 2:1.
As a further technical scheme, the vulcanizing agent comprises one or more of sulfur and peroxide;
the accelerator comprises one or more of 2-mercaptobenzothiazole and dibenzothiazyl disulfide;
the active agent comprises one or more of zinc oxide and stearic acid.
As a further technical scheme, the lubricant comprises one or more of paraffin and stearate;
the flame retardant comprises one or more of aluminum hydroxide, antimony trioxide and decabromodiphenyl ethane;
the reinforcing agent comprises one or more of carbon black and white carbon black.
The invention also provides a preparation method of the cable sheath, which comprises the steps of mixing the components in parts by weight, and vulcanizing to obtain the cable sheath.
As a further technical solution, the vulcanization temperature is 160 ℃.
A rubber jacketed cable, the sheath layer of the rubber jacketed cable is the cable sheath.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, 4- (dihydroxymethylsilane) butyronitrile is used as a compatibilizer, so that the compatibility between the anti-aging agent and the natural rubber is improved, the dispersibility of the anti-aging agent in a natural rubber matrix material is improved, a natural rubber composite material with good anti-aging performance and good mechanical property is prepared, and the problems that the anti-aging agent cannot have an optimal effect in the natural rubber matrix material and the mechanical property of the composite material is greatly reduced in the prior art are solved.
2. According to the invention, 4- (dihydroxymethylsilane) butyronitrile is used as a compatibilizer, so that the compatibility between the amine antioxidant and the natural rubber is improved. The reason for this is that: the nitrile group in the 4- (dihydroxymethylsilane) butyronitrile molecular structure can form a hydrogen bond with the amino group in the amine antioxidant molecular structure, and the silicon hydroxyl group can react with the epoxy group on the natural rubber macromolecular chain to form a Si-O-C bond, so that the compatibility between the amine antioxidant and the natural rubber is improved, and the ageing resistance and the mechanical property of the natural rubber composite material are improved.
3. According to the invention, the mass ratio of the amine anti-aging agent to the compatibilizer is controlled within the range of 2:0.5-1.5, so that the ageing resistance and the mechanical properties of the natural rubber composite material are further improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill 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.
The compatibilizers in the following examples and comparative examples were 4- (dihydroxymethylsilane) butyronitrile, CAS number: 18293-49-7; the natural rubber is epoxidized natural rubber.
Example 1
S1, preparing materials: 100 parts of natural rubber, 5 parts of sulfur, 2 parts of 2-mercaptobenzothiazole, 3 parts of zinc oxide, 4020.6 parts of anti-aging agent, 3 parts of compatibilizer, 3 parts of paraffin, 25 parts of antimony trioxide and 50 parts of carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Example 2
S1, preparing materials: 100 parts of natural rubber, 5 parts of sulfur, 2 parts of 2-mercaptobenzothiazole, 3 parts of zinc oxide, 6 parts of anti-aging agent 2246, 3 parts of compatibilizer, 3 parts of paraffin, 25 parts of antimony trioxide and 50 parts of carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Example 3
S1, preparing materials: 100 parts of natural rubber, 5 parts of sulfur, 2 parts of 2-mercaptobenzothiazole, 3 parts of zinc oxide, 4020 parts of an anti-aging agent, 4.5 parts of a compatibilizer, 3 parts of paraffin, 25 parts of antimony trioxide and 50 parts of carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Example 4
S1, preparing materials: 100 parts of natural rubber, 5 parts of sulfur, 2 parts of 2-mercaptobenzothiazole, 3 parts of zinc oxide, 4020 parts of an anti-aging agent, 1.5 parts of a compatibilizer, 3 parts of paraffin, 25 parts of antimony trioxide and 50 parts of carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Example 5
S1, preparing materials: 100 parts of natural rubber, 4 parts of benzoyl peroxide, 1 part of 2-mercaptobenzothiazole, 2 parts of stearic acid, 224 parts of an anti-aging agent, 2 parts of a compatibilizer, 2 parts of calcium stearate, 20 parts of aluminum hydroxide and 40 parts of white carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Example 6
S1, preparing materials: 100 parts of natural rubber, 6 parts of dicumyl peroxide, 3 parts of dibenzothiazyl disulfide, 4 parts of zinc oxide, 0 part of anti-aging agent 4010, 4 parts of compatibilizer, 4 parts of paraffin, 30 parts of decabromodiphenyl ethane and 45 parts of carbon black;
s2, adding the raw materials into a mixer, mixing uniformly, transferring into an internal mixer at 80 ℃ for plasticating, transferring into the mixer for mixing at 70 ℃ for 10min, and extruding by a double-screw extruder at 160 ℃ to obtain the cable sheath.
Comparative example 1
The only difference from example 1 is that no compatibilizer was added.
Comparative example 2
The only difference from example 1 is that no anti-aging agent 4020 and no compatibilizer are added.
Performance test:
mechanical properties: the cable jackets obtained in examples 1 to 6 and comparative examples 1 to 2 were tested for tensile strength with reference to GB/T2951.11-2008.
Heat aging resistance: the cable jackets obtained in examples 1 to 6 and comparative examples 1 to 2 were subjected to a heat aging test at 100℃for 72 hours by the method of GB/T2951.12-2008, and after the completion of the heat aging test, the tensile strength was again tested, and the tensile strength retention was calculated according to the following calculation formula.
Tensile strength retention (%) = tensile strength after heat aging/tensile strength before heat aging×100%
The data are recorded in table 1.
TABLE 1 mechanical Properties and aging resistance of Cable jackets
As can be seen from Table 1, the tensile strength of the cable sheath provided by the invention is above 22.4MPa, the tensile strength is still above 18.3MPa after a heat aging experiment at 100 ℃ for 72 hours, the retention rate of the tensile strength is above 81.7%, and the cable sheath has excellent mechanical property and aging resistance.
Comparative example 1 compared with comparative example 2, the comparative example 2 was free of the anti-aging agent 4020 and the compatibilizer, the comparative example 1 was free of the compatibilizer, and the cable sheath obtained in the comparative example 1 was superior in the aging resistance to the comparative example 2 but was far lower in tensile strength than the comparative example 2. The addition of the anti-aging agent 4020 improves the anti-aging performance of the cable sheath, but can lead to the great reduction of the mechanical property.
Comparative example 1 compared with example 1, the compatibilizer was not added in comparative example 1, the compatibilizer was added in example 1, and the mechanical properties and the aging resistance of the cable jacket obtained in example 1 were much higher than those of comparative example 1. The compatibility between the amine antioxidant and the natural rubber is improved by adding the compatibilizer, probably because the nitrile group in the molecular structure of the 4- (dihydroxymethylsilane) nitrile can form a hydrogen bond with the amino group in the molecular structure of the amine antioxidant, and meanwhile, the silicon hydroxyl group in the molecular structure can react with the epoxy group on the macromolecular chain of the natural rubber to form a Si-O-C bond, so that the mechanical property and the ageing resistance of the cable sheath are improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The cable sheath is characterized by comprising the following components in parts by weight: 100 parts of natural rubber, 4-6 parts of vulcanizing agent, 1-3 parts of accelerator, 2-4 parts of active agent, 4-8 parts of anti-aging agent, 1.5-4.5 parts of compatibilizer, 2-4 parts of lubricant, 20-30 parts of flame retardant and 40-50 parts of reinforcing agent, wherein the compatibilizer is 4- (dihydroxymethylsilyl) butyronitrile;
the natural rubber is epoxidized natural rubber;
the anti-aging agent is an amine anti-aging agent.
2. The cable jacket of claim 1, wherein the amine based anti-aging agent comprises anti-aging agent 4010, anti-aging agent 4020, anti-aging agent 224.
3. The cable sheath of claim 1, wherein the mass ratio of the anti-aging agent to the compatibilizer is 2:0.5-1.5.
4. A cable jacket according to claim 3, wherein the mass ratio of the anti-ageing agent to the compatibilizer is 2:1.
5. A cable jacket according to claim 1, wherein said vulcanizing agent comprises one or more of sulfur and peroxide;
the accelerator comprises one or more of 2-mercaptobenzothiazole and dibenzothiazyl disulfide;
the active agent comprises one or more of zinc oxide and stearic acid.
6. A cable jacket according to claim 1, wherein said lubricant comprises one or more of paraffin wax, stearate;
the flame retardant comprises one or more of aluminum hydroxide, antimony trioxide and decabromodiphenyl ethane;
the reinforcing agent comprises one or more of carbon black and white carbon black.
7. The method for preparing the cable sheath according to claim 1, wherein the cable sheath is obtained by vulcanizing the components with the parts by weight after mixing.
8. A rubber jacketed cable, characterized in that the jacket layer of the rubber jacketed cable is the cable jacket according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254532.7A CN115991901B (en) | 2023-03-16 | 2023-03-16 | Rubber jacketed cable and preparation method of cable jacket thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254532.7A CN115991901B (en) | 2023-03-16 | 2023-03-16 | Rubber jacketed cable and preparation method of cable jacket thereof |
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| Publication Number | Publication Date |
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| CN115991901A CN115991901A (en) | 2023-04-21 |
| CN115991901B true CN115991901B (en) | 2023-05-30 |
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| CN202310254532.7A Active CN115991901B (en) | 2023-03-16 | 2023-03-16 | Rubber jacketed cable and preparation method of cable jacket thereof |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104311926A (en) * | 2014-09-30 | 2015-01-28 | 安徽华峰电缆集团有限公司 | Aging-resistant cable sheath material |
| CN106146926B (en) * | 2016-07-22 | 2019-01-01 | 安徽电气集团股份有限公司 | A kind of heat-resisting ageing-resisting cable sheath material |
| CN114479206A (en) * | 2020-11-11 | 2022-05-13 | 赛轮集团股份有限公司 | Low-heat-generation tear-resistant rubber composition for engineering tire and preparation method thereof |
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