CN117304590B - High-weather-resistance power cable and production process thereof - Google Patents
High-weather-resistance power cable and production process thereof Download PDFInfo
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- CN117304590B CN117304590B CN202311600055.1A CN202311600055A CN117304590B CN 117304590 B CN117304590 B CN 117304590B CN 202311600055 A CN202311600055 A CN 202311600055A CN 117304590 B CN117304590 B CN 117304590B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 34
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- DOFIAZGYBIBEGI-UHFFFAOYSA-N 3-sulfanylphenol Chemical compound OC1=CC=CC(S)=C1 DOFIAZGYBIBEGI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 239000004014 plasticizer Substances 0.000 claims abstract description 7
- 239000012190 activator Substances 0.000 claims abstract description 6
- 239000006229 carbon black Substances 0.000 claims description 44
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 claims description 34
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 34
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 17
- 235000021355 Stearic acid Nutrition 0.000 claims description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 17
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 17
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 17
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 17
- 239000008117 stearic acid Substances 0.000 claims description 17
- 229910052717 sulfur Inorganic materials 0.000 claims description 17
- 239000011593 sulfur Substances 0.000 claims description 17
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 17
- 229960002447 thiram Drugs 0.000 claims description 17
- 239000011787 zinc oxide Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 4
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 claims description 2
- STSDHUBQQWBRBH-UHFFFAOYSA-N n-cyclohexyl-1,3-benzothiazole-2-sulfonamide Chemical compound N=1C2=CC=CC=C2SC=1S(=O)(=O)NC1CCCCC1 STSDHUBQQWBRBH-UHFFFAOYSA-N 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims description 2
- 239000011297 pine tar Substances 0.000 claims description 2
- 229940068124 pine tar Drugs 0.000 claims description 2
- UMJGOCMSBZWCNY-UHFFFAOYSA-N 2-methyl-4-sulfanylphenol Chemical compound CC1=CC(S)=CC=C1O UMJGOCMSBZWCNY-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 235000019241 carbon black Nutrition 0.000 description 35
- 229920000459 Nitrile rubber Polymers 0.000 description 27
- 230000032683 aging Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 13
- 239000003963 antioxidant agent Substances 0.000 description 11
- 230000003078 antioxidant effect Effects 0.000 description 11
- 238000000227 grinding Methods 0.000 description 7
- 238000003878 thermal aging Methods 0.000 description 6
- VVFRSJVZAQTETJ-UHFFFAOYSA-N 3-[(2-sulfanylphenyl)methyl]phenol Chemical compound OC1=CC=CC(CC=2C(=CC=CC=2)S)=C1 VVFRSJVZAQTETJ-UHFFFAOYSA-N 0.000 description 4
- -1 4-hydroxy-3-methylbenzylthiophenol Chemical compound 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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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)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high polymer materials, and provides a high-weather-resistance electric cable and a production process thereof. The high weather resistance electric cable comprises a sheath layer, an insulating layer and a conductor from outside to inside, wherein the sheath layer is made of sheath materials, and the sheath materials comprise the following components in parts by mass: 70 parts of NBR, 30 parts of EPDM, 3-8 parts of compatilizer, 3-7 parts of activator, 1.5-3.5 parts of anti-aging agent, 30-50 parts of filler, 3-8 parts of softener, 3-10 parts of plasticizer, 1.5-3.5 parts of vulcanizing agent and 0.5-1.5 parts of accelerator, wherein the compatilizer comprises a mixture of one of 3-hydroxy thiophenol and 4-hydroxy-3-methyl thiophenol and EPDM-g-MAH. Through the technical scheme, the problem of poor compatibility of NBR and EPDM in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-weather-resistance electric cable and a production process thereof.
Background
With the rapid development of economic construction in China, the demand of the power cable is continuously increased, the power cable generally comprises a conductor, an insulating layer and a sheath layer, and the performance of the sheath layer plays a decisive role in the performance of the power cable.
The electric cable with good weather resistance has long service life, and the weather resistance comprises water resistance, oil resistance, heat aging resistance, ozone resistance, ultraviolet aging resistance, chemical corrosion resistance and the like. Nitrile Butadiene Rubber (NBR) is a synthetic rubber formed by copolymerizing butadiene and acrylonitrile, and has good oil resistance, ultraviolet aging resistance and water resistance, but has general heat aging resistance; ethylene Propylene Diene Monomer (EPDM) has good ozone resistance, thermal aging resistance, chemical resistance, and has a disadvantage of poor oil resistance. The NBR and the EPDM are blended to integrate the performances of the two materials, so that the blended rubber material with good thermal aging resistance and oil resistance is obtained, but the solubility parameter delta value of the NBR is greatly different from that of the EPDM, the compatibility of the NBR and the EPDM is poor, and phase separation easily occurs, so that the comprehensive performance of the blended rubber material, particularly the thermal aging resistance, is reduced.
Disclosure of Invention
The invention provides a high-weather-resistance power cable and a production process thereof, and solves the problem of poor compatibility of NBR and EPDM in the related technology.
The technical scheme of the invention is as follows:
the high weather resistance electric cable comprises a sheath layer, an insulating layer and a conductor from outside to inside, wherein the sheath layer is made of a sheath material, and the sheath material comprises the following components in parts by mass: 70 parts of NBR, 30 parts of EPDM, 3-8 parts of compatilizer, 3-7 parts of activator, 1.5-3.5 parts of anti-aging agent, 30-50 parts of filler, 3-8 parts of softener, 3-10 parts of plasticizer, 1.5-3.5 parts of vulcanizing agent and 0.5-1.5 parts of accelerator,
the compatilizer comprises a mixture of EPDM-g-MAH and one of 3-hydroxy thiophenol and 4-hydroxy-3-methyl thiophenol.
EPDM-g-MAH is maleic anhydride grafted ethylene propylene diene monomer.
As a further technical scheme, the compatilizer comprises EPDM-g-MAH and 3-hydroxy thiophenol with the mass ratio of 2:3-4:1.
As a further technical scheme, the compatilizer comprises EPDM-g-MAH and 3-hydroxy thiophenol in a mass ratio of 3:2.
As a further technical solution, the filler comprises two different types of carbon black.
As a further embodiment, the filler comprises carbon black N660 and carbon black N539.
As a further embodiment, the carbon black N660 has a higher mass than the carbon black N539.
As a further technical solution, the mass of the carbon black N660 is 2 times higher than the mass of the carbon black N539.
As a further technical scheme, the mass ratio of the carbon black N660 to the carbon black N539 is 30:10-35:5.
As a further technical scheme, the activating agent comprises one or two of zinc oxide and stearic acid;
the anti-aging agent comprises one or more of an anti-aging agent RD, an anti-aging agent 2246 and an anti-aging agent H;
the softener comprises one or more of coumarone resin, paraffin and pine tar;
the plasticizer comprises one or more of dioctyl phthalate, dibutyl phthalate and dibutyl sebacate.
As a further technical scheme, the vulcanizing agent comprises one or more of sulfur and peroxide;
the accelerator comprises one or two of N-cyclohexyl-2-benzothiazole sulfonamide and tetramethyl thiuram disulfide.
The invention also provides a production process of the high-weather-resistance electric cable, which comprises the following steps of:
s1, coating an insulating layer outside a conductor to obtain a power cable semi-finished product;
s2, plasticating NBR and EPDM, adding a compatilizer, an activator, an anti-aging agent and a softener for primary mixing, adding a filler, a plasticizer, a vulcanizing agent and an accelerator for secondary mixing, vulcanizing, and coating the outside of the electric cable semi-finished product to obtain the high-weather-resistance electric cable.
The working principle and the beneficial effects of the invention are as follows:
1. the invention uses one of 3-hydroxy thiophenol and 4-hydroxy-3-methyl thiophenol and the mixture of EPDM-g-MAH as compatilizer, improves the compatibility of NBR and EPDM, improves the strength and thermal aging resistance of sheath materials, and provides a high weather resistance electric cable.
2. According to the invention, EPDM-g-MAH and 3-hydroxy thiophenol with the mass ratio of 2:3-4:1 are used as compatilizers, so that the strength and the thermal aging resistance of the sheath 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.
NBR in the following examples and comparative examples is nitrile rubber 3305E; EPDM is EPDM 4045M; the grafting ratio of MAH in EPDM-g-MAH was 1%.
Example 1
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 4 parts of EPDM-g-MAH, 1 part of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times of premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate for mixing by a cutting knife after wrapping, adding 660 parts of carbon black N after thinning uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethyl thiuram disulfide for mixing by a cutting knife, beating for triangle wrapping, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 2
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times of premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate for mixing by a cutting knife after wrapping, adding 660 parts of carbon black N after thinning uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethyl thiuram disulfide for mixing by a cutting knife, beating for triangle wrapping, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 3
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH 2, 3 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD, carrying out triangular package for 3 times and premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate for mixing by a cutting knife after roll wrapping, adding 660 parts of carbon black N after uniform thin pass, finally adding 2.5 parts of sulfur and 1 part of tetramethyl thiuram disulfide for mixing by a cutting knife, carrying out triangular package, carrying out uniform mixing, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 4
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 4-hydroxy-3-methyl thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roller for mixing, adding 660 parts of carbon black N after thinning uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide for mixing, grinding into a triangular bag, mixing uniformly, placing the lower sheet for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 5
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a roll, mixing by a cutting knife, adding 660 parts of carbon black and 550 parts of carbon black N after uniform thin pass, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, cutting into a triangle, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 6
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after thin-pass uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 7
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after thin-pass uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 8
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after thin-pass uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 9
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after thin-pass uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 10
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after thin-pass uniformly, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Example 11
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 3 parts of EPDM-g-MAH, 2 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of antioxidant RD for 3 times, pre-mixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a wrapping roll, mixing by a cutting knife, adding 660 parts of carbon black N and 539 parts of carbon black after uniform thin pass, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, grinding into a triangular bag, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Comparative example 1
And plasticating 70 parts of NBR and 30 parts of EPDM in an open mill at 40 ℃ for 3 times, adding 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of an anti-aging agent RD, carrying out triangular package for 3 times, premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a package roller, carrying out cutting knife mixing, adding 660 parts of carbon black N after uniform thin pass, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, carrying out cutting knife mixing, carrying out triangular package, carrying out uniform mixing, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Comparative example 2
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 5 parts of EPDM-g-MAH, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of an anti-aging agent RD, performing triangular package for 3 times, premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a package roller, mixing by a cutting knife, adding 660 parts of carbon black N after uniform thinning, adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, performing triangular package, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Comparative example 3
And plasticating 70 parts of NBR and 30 parts of EPDM for 3 times in a 40 ℃ open mill, adding 5 parts of 3-hydroxy thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of an anti-aging agent RD, bagging for 3 times, premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate into a bag roller, mixing by a cutting knife, adding 660 parts of carbon black N after uniform thinning, adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide, mixing by a cutting knife, bagging uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Comparative example 4
Plasticizing 70 parts of NBR and 30 parts of EPDM in an open mill at 40 ℃ for 3 times, adding 5 parts of 4-hydroxy-3-methyl thiophenol, 3 parts of zinc oxide, 2 parts of stearic acid and 2.5 parts of an anti-aging agent RD, carrying out triangular package for 3 times, premixing uniformly, adding 5 parts of coumarone resin and 6 parts of dioctyl phthalate for mixing by a cutting knife after roll wrapping, adding 660 parts of carbon black N after uniform thin pass, finally adding 2.5 parts of sulfur and 1 part of tetramethylthiuram disulfide for mixing by a cutting knife, carrying out triangular package, mixing uniformly, placing the lower piece for 10 hours, and vulcanizing at 170 ℃ to obtain the sheath material.
Preparing a high weather resistance electric cable:
s1, coating an insulating layer outside a conductor to obtain a power cable semi-finished product for standby;
s2, respectively coating the sheath materials obtained in the examples 1-11 and the comparative examples 1-4 on the outer part of the semi-finished product of the electric cable to obtain the electric cable with high weather resistance.
The sheath materials obtained in examples 1 to 11 and comparative examples 1 to 4 were tested for tensile strength and elongation at break by referring to the method of GB/T2951.11-2008; the heat aging test was performed at 120℃for 48 hours by referring to the method of GB/T2951.12-2008, and the change rate of tensile strength and the change rate of elongation at break were calculated according to the following formulas, and the results are recorded in Table 1.
Tensile strength change rate (%) = (tensile strength after heat aging test-tensile strength before heat aging test)/(tensile strength before heat aging test) ×100)
Elongation at break change (%) = (elongation at break after heat aging test-elongation at break before heat aging test)/(elongation at break before heat aging test×100)
TABLE 1 thermal aging resistance of jacket materials
As can be seen from Table 1, the sheath material provided by the invention has high strength and good heat aging resistance.
Examples 1 to 4 are superior to comparative examples 1 to 4 in that EPDM-g-MAH and 3-hydroxybenzylthiophenol are added in examples 1 to 3, EPDM-g-MAH and 4-hydroxy-3-methylbenzylthiophenol are added in example 4, no compatibilizing agent is added in comparative example 1, EPDM-g-MAH is added in comparative example 2, 3-hydroxybenzylthiophenol is added in comparative example 3, 4-hydroxy-3-methylbenzylthiophenol is added in comparative example 4, and the strength and heat aging resistance of the jacket material obtained in examples 1 to 4 are superior to those of comparative examples 1 to 4, indicating that when EPDM-g-MAH and 3-hydroxybenzylthiophenol or EPDM-g-MAH and 4-hydroxy-3-methylbenzylthiophenol are used as compatibilizing agents, the effect of improving NBR and EPDM by using single EPDM-g-MAH, 3-hydroxybenzylthiophenol and 4-hydroxy-3-methylbenzylthiophenol is superior, and the strength and heat aging resistance of the jacket material can be greatly improved.
Examples 5 to 11 use two different types of carbon blacks in examples 5 to 11 compared with example 2, and only one type of carbon black is used in example 2, and the strength and heat aging resistance of the jacket material obtained in examples 5 to 11 are better than those of example 2, which means that the two different types of carbon blacks have better dispersibility in the jacket material and thus higher strength and good heat aging resistance than one type of carbon black.
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 (9)
1. The high weather resistance electric cable comprises a sheath layer, an insulating layer and a conductor from outside to inside, wherein the sheath layer is made of sheath materials, and the high weather resistance electric cable is characterized in that the sheath materials comprise the following components in parts by mass: 70 parts of NBR, 30 parts of EPDM, 3-8 parts of compatilizer, 3-7 parts of activator, 1.5-3.5 parts of anti-aging agent, 30-50 parts of filler, 3-8 parts of softener, 3-10 parts of plasticizer, 1.5-3.5 parts of vulcanizing agent and 0.5-1.5 parts of accelerator,
the compatilizer comprises EPDM-g-MAH and 3-hydroxy thiophenol in a mass ratio of 2:3-4:1.
2. The high weatherability power cable of claim 1, wherein the filler comprises two different types of carbon black.
3. The high weatherability power cable of claim 2, wherein the filler comprises carbon black N660 and carbon black N539.
4. A high weather resistant power cable according to claim 3, wherein the mass of carbon black N660 is higher than the mass of carbon black N539.
5. The high weatherability power cable of claim 4, wherein the mass of carbon black N660 is 2 times higher than the mass of carbon black N539.
6. The high weather resistance electric cable of claim 5, wherein the mass ratio of carbon black N660 to carbon black N539 is 30:10-35:5.
7. The high weatherability power cable of claim 1, wherein the activator comprises one or both of zinc oxide, stearic acid;
the anti-aging agent comprises one or more of an anti-aging agent RD, an anti-aging agent 2246 and an anti-aging agent H;
the softener comprises one or more of coumarone resin, paraffin and pine tar;
the plasticizer comprises one or more of dioctyl phthalate, dibutyl phthalate and dibutyl sebacate.
8. The high weather resistant power cable according to claim 1, wherein the vulcanizing agent comprises one or more of sulfur and peroxide;
the accelerator comprises one or two of N-cyclohexyl-2-benzothiazole sulfonamide and tetramethyl thiuram disulfide.
9. The production process of the high-weather-resistance electric cable according to any one of claims 1 to 8, comprising the following steps:
s1, coating an insulating layer outside a conductor to obtain a power cable semi-finished product;
s2, plasticating NBR and EPDM, adding a compatilizer, an activator, an anti-aging agent and a softener for primary mixing, adding a filler, a plasticizer, a vulcanizing agent and an accelerator for secondary mixing, vulcanizing, and coating the outside of the electric cable semi-finished product to obtain the high-weather-resistance electric cable.
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102796293A (en) * | 2012-08-16 | 2012-11-28 | 中橡集团曙光橡胶工业研究设计院 | High performance rubber sheath rubber material |
WO2018130194A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber products applying composite, and manufacturing method |
CN114350040A (en) * | 2021-12-31 | 2022-04-15 | 南京利德东方橡塑科技有限公司 | HNBR/NBR blended rubber material and preparation method thereof |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN102796293A (en) * | 2012-08-16 | 2012-11-28 | 中橡集团曙光橡胶工业研究设计院 | High performance rubber sheath rubber material |
WO2018130194A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber products applying composite, and manufacturing method |
CN114350040A (en) * | 2021-12-31 | 2022-04-15 | 南京利德东方橡塑科技有限公司 | HNBR/NBR blended rubber material and preparation method thereof |
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