CN109651720A - A kind of nuclear reactor midium voltage cable conductor shielding material and preparation method thereof - Google Patents
A kind of nuclear reactor midium voltage cable conductor shielding material and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of nuclear reactor midium voltage cable conductor shielding material, according to parts by weight include the following raw material component: base-material: 100 parts；Vulcanizing agent: 2~7 parts；Co-curing agent: 1.5~6 parts；Coupling agent: 0.5~5 part；Anti-aging agent: 4~20 parts；Softening agent: 4~40 parts；Anti-irradiation agent: 1~18 part；Anti-hydrolysis agent: 1~10 part；Conductive agent: 80~250 parts.Wherein, the base-material is EPDM and vinyl-vinyl acetate copolymer EVM, and the weight ratio of the two is 1:0.5~1.5.The present invention also provides the preparation methods of above-mentioned conductor shielding material.The conductor shielding material processed using preparation method of the invention, have the performances such as resistance to long term heat ageing, radiation resistance and waterproof, and has the characteristic of low smoke, zero halogen low toxicity, it can run 60 years or more under nuclear reactor nominal situation, and guarantee to remain to execute its function in design basis accident DBA and Post-DBA.
Description
Technical field
The present invention relates to technical field of electric wires and cables, in particular to the production technology neck of cable production conductor shielding material
Domain, specially a kind of nuclear reactor midium voltage cable conductor shielding material and preparation method thereof.
Background technique
Nuclear reactor midium voltage cable not only needs excellent electric property performance, mechanical performance and craftsmanship with conductor shielding
It can, it is necessary to which low smoke, zero halogen low toxicity has the characteristics that excellent resistance to long term heat ageing, radiation resistance and waterproof performance.It is common at present
Midium voltage cable conductor shielding material do not have the performances such as resistance to long term heat ageing, radiation resistance and waterproof, part conductor shielding generally
Do not have low smoke, zero halogen low toxicity performance even.
Such as Chinese patent Authorization Notice No.: 105061879 B of CN discloses a kind of based on ethylene-vinyl acetate copolymer
Conductor thermoplasticity semi-conductive screen and preparation method thereof, because of the use of linear low density polyethylene, the work of the shielding material
Temperature can only achieve 70 DEG C of requirement, be unsatisfactory for the requirement of 90 DEG C of nuclear reactor midium voltage cable operating temperature, and without resistance to length
The performances such as phase heat ageing, radiation resistance and waterproof are unsatisfactory for the laying environmental requirement of nuclear reactor midium voltage cable shielding material.
Such as Chinese patent Authorization Notice No.: 102898717 B of CN discloses a kind of 35kV cable and is crosslinked with non-EVA substrate
Type semiconductive inner shield material and its preparation, the performances such as the no resistance to long term heat ageing of the shielding material, radiation resistance and waterproof, are unsatisfactory for core
The laying environmental requirement of reactor midium voltage cable.
It therefore, must also it is urgent to provide a kind of conductor shielding material for having the performances such as resistance to long term heat ageing, radiation resistance and waterproof
Conductor shielding material is set to have the characteristic of low smoke, zero halogen low toxicity.
Summary of the invention
The object of the invention is in order to solve the above-mentioned technical problem, and provide a kind of nuclear reactor midium voltage cable conductor
Shielding material and preparation method thereof.The conductor shielding material processed using preparation method of the invention, can nuclear reactor just
It is run 60 years or more under normal operating condition, and guarantees to remain to execute its function in design basis accident DBA and Post-DBA, it is anti-to meet core
Heap midium voltage cable is answered to lay environmental requirement.
An object of the present invention is to provide a kind of nuclear reactor midium voltage cable conductor shielding material, the technical solution of use
It is as follows:
A kind of nuclear reactor midium voltage cable conductor shielding material, according to parts by weight, including the following raw material component:
Base-material: 100 parts；
Vulcanizing agent: 2~7 parts；
Co-curing agent: 1.5~6 parts；
Coupling agent: 0.5~5 part；
Anti-aging agent: 4~20 parts；
Softening agent: 4~40 parts；
Anti-irradiation agent: 1~18 part；
Anti-hydrolysis agent: 1~10 part；
Conductive agent: 80~250 parts.
Wherein, the base-material is EPDM and vinyl-vinyl acetate copolymer EVM, and the weight ratio of the two is 1:0.5
~1.5.
Preferably, according to parts by weight, the conductor shielding material includes the following raw material component:
Base-material: 100 parts；
Vulcanizing agent: 3~6 parts；
Co-curing agent: 2~5 parts；
Coupling agent: 1~4 part；
Anti-aging agent: 6~16 parts；
Softening agent: 6~30 parts；
Anti-irradiation agent: 2~15 parts；
Anti-hydrolysis agent: 2~8 parts；
Conductive agent: 100~200 parts.
The present invention selects above-mentioned raw materials formula to be prepared into conductor shielding material, it can be in nuclear reactor nominal situation after tested
Lower operation 60 years or more, and guarantee to remain to execute its function in design basis accident DBA and Post-DBA, meet in nuclear reactor
Voltage cable lays environmental requirement.Conductor shielding material of the invention has the features such as resistance to long term heat ageing, radiation resistance and waterproof, due to
The selection of raw material of the present invention is also equipped with the characteristic of low smoke, zero halogen low toxicity.
Further, EPDM described in inventive formulation selects high ethylene, low Mooney, Third monomer content high
The trade mark, preferably 210 trade mark of South Korea's brocade lake KEP, ethylene contents 61.5~67.5%, Mooney viscosity (ML1+4,125 DEG C) be 18~
28, Third monomer is ethylidene norbornene ENB, and content is 4.7~6.7%；Or preferred 510 trade mark of South Korea's brocade lake KEP, second
Alkene content 69~73%, Mooney viscosity (ML1+4,125 DEG C) are 18~28, and Third monomer is ethylidene norbornene ENB, content
It is 5.7~6.7%.The Third monomer of above-mentioned EPDM is higher, and curability is improved, and processing is easier, and can
Reduce volume resistivity.
Further, the vinyl-vinyl acetate copolymer EVM selects vinyl acetate content to be greater than 45%, branch
The high amorphous copolymer of change degree, preferably German Baeyer second Warburg Pincus 450, vinyl acetate content 45%, Mooney viscosity (ML1+4,
100 DEG C) it is 20.Above-mentioned vinyl-vinyl acetate copolymer EVM can improve the inorganic assistant processability of conductor shielding material of the present invention
Can, improve the mixing of second third, extrusion performance.
Further, the vulcanizing agent is cumyl peroxide, 1,1- bis(t-butylperoxy) -3,3,5- front three
One of butylcyclohexane or dual-tert-butyl peroxy diisopropyl benzene；The co-curing agent is paraquinonedioxime, triallyl is different
One of cyanate or triallylcyanurate.
Further, the coupling agent is γ-methacrylic acid trimethylene trimethoxy silane, vinyl triethoxyl
One of silane or vinyl-three-(beta-methoxy ethyoxyl) silane.The molecule of coupling agent contains the work different there are two types of performance
Property group, a kind of active group can form chemical bond with inorganic material surface, generate organosilicon monolayer, make inorganic material by hydrophilic
Property becomes hydrophobicity, to improve the electrical property and water resistance of rubber；Another active group can be improved with rubber good combination
Rubber forms rubber-inorganic material key to the wellability of inorganic material in sulfidation, to improve the crosslinking degree of rubber.
The use of coupling agent is good one of the key measure of conductor shielding material waterproof performance of the present invention.
Further, the anti-aging agent includes activated zinc oxide and alkylated diphenylamine compound, wherein active oxidation
The weight ratio of zinc and alkylated diphenylamine compound is 1:0.5~1.5.Alkylated diphenylamine compound is to various types of old
Change, especially thermo-oxidative ageing there are outstanding protective benefits, is to ensure that conductor shielding material of the present invention meets the key in 60 year service life and arranges
One of apply.
Further, the softening agent is one of paraffin oil, Liquid Ethylene Propylene Methylene and high viscosity cylinder oil；It is described
Conductive agent is conductive furnace black.
Further, the anti-irradiation agent includes dysprosia and boron phosphide, the weight ratio of the two is 1:0.5~1.5；It is anti-
The use of irradiation agent is the guarantee that conductor shielding material of the present invention has good radiation-resistant property.The anti-hydrolysis agent includes tribasic
Lead stearate and poly- carbonic acid diimine, the weight ratio of the two are 1:0.8~1.5.The use of anti-hydrolysis agent is conductor screen of the present invention
Cover good one of the key measure of material waterproof performance.
The second object of the present invention is to provide the preparation method of above-mentioned nuclear reactor cable conductor shielding material comprising such as
Lower step:
(1) weighing weighs 100 parts of base-material, 2~7 parts of vulcanizing agent, 1.5~6 parts of co-curing agent, 0.5~5 part of coupling agent, prevents
4~20 parts of old agent, 4~40 parts of softening agent, 1~18 part of anti-irradiation agent, 1~10 part of anti-hydrolysis agent, 80~250 parts of conductive agent it is standby
With；
(2) it is kneaded, after being first kneaded base-material 1~2 minute, half conductive agent and half softening is then added
Agent sequentially adds coupling agent, anti-aging agent, anti-irradiation agent, anti-hydrolysis agent and remaining half conductive agent and half
Softening agent is eventually adding successively vulcanizing agent and co-curing agent after being kneaded 3~6 minutes, is kneaded 2~3 minutes, and Bao Tong 5 times or more,
The roller temperature of entire mixing process is controlled at 90~110 DEG C；
(3) slice.
The step (2) carries out on open mill, masticator or mixer, and step (3) carries out on a mill.
Compared with prior art, the present invention is by adopting the above-described technical solution, its advantages are as follows:
1, a kind of nuclear reactor cable conductor shielding material provided by the invention, passes through the reasonable choosing of substrate and anti-aging agent
With conductor shielding material of the present invention obtains material lifetime by method as defined in 60216 standard of IEC, by the old longevity assessment of material heat
And activation energy data, the heat ageing condition of cable equivalent simulation Thermal life evaluation, evaluation are calculated further according to material activation energy data
Service life is greater than 60 years.
2, a kind of nuclear reactor cable conductor shielding material provided by the invention passes through the reasonable choosing of substrate and anti-irradiation agent
With conductor shielding material of the present invention has enough radiation-resistant properties, the gamma-ray irradiation aging accumulation under by nominal situation
Dosage 412.5kGy；Dosage rate be 1kGy/h ± 0.5kGy/h, reserved elongation at break >=50%, can at sea small cores it is anti-
It answers and guarantees to remain to execute its function in design basis accident DBA and Post-DBA in heap life cycle.
3, a kind of nuclear reactor cable conductor shielding material provided by the invention, passes through the reasonable choosing of substrate and each compounding agent
With can guarantee that conductor shielding material of the present invention is soft, specific gravity is small, and volume resistivity is low.
4, a kind of nuclear reactor cable conductor shielding material provided by the invention, passes through substrate, coupling agent and waterproofing agent
Reasonable selection, conductor shielding material of the present invention meet 50 DEG C of immersion capacitor gaining rate tests, and 1d~14d capacitor gaining rate is not more than 6%, 7d
~14d capacitor gaining rate is not more than 2.5%, and the waterproof performance that ensure that cable is required by the capacitor gaining rate of conductor shielding material, full
The requirement of sufficient nuclear reactor cable laying humid environment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments to the present invention
It is specifically described, it is necessary to, it is noted that following embodiment is used only for that the present invention is explained and illustrated, be not used to
Limit the present invention.Some nonessential modifications and adaptations that those skilled in the art are made according to foregoing invention content, still belong to
In protection scope of the present invention.
Embodiment 1
A kind of sea small cores reactor cable conductor shielding material, the component including following parts by weight:
Base-material: 100 parts；
Vulcanizing agent: 5 parts；
Co-curing agent: 4 parts；
Coupling agent: 2 parts；
Anti-aging agent: 8 parts；
Softening agent: 25 parts；
Anti-irradiation agent: 5 parts；
Anti-hydrolysis agent: 4 parts；
Conductive agent: 150 parts.
The preparation method of above-mentioned nuclear reactor cable conductor shielding material includes the following steps:
(1) weighing weighs 100 parts of base-material, 5 parts of vulcanizing agent, 4 parts of co-curing agent, 2 parts of coupling agent, 8 parts of anti-aging agent, softening
25 parts of agent, 5 parts of anti-irradiation agent, 4 parts of anti-hydrolysis agent, 150 parts of conductive agent it is spare；
(2) it is kneaded, after being first kneaded base-material 1.5 minutes, half conductive agent and half softening agent is then added,
Sequentially add coupling agent, anti-aging agent, anti-irradiation agent, anti-hydrolysis agent and remaining half conductive agent and half softening
Agent is eventually adding successively vulcanizing agent and co-curing agent after being kneaded 4 minutes, is kneaded 2.5 minutes, and Bao Tong 6 times, entire mixing process
Roller temperature control at 95~105 DEG C；
(3) slice.
The step (2) carries out on open mill, masticator or mixer, and step (3) carries out on a mill.
In above-mentioned raw materials, base-material is EPDM South Korea brocade lake KEP 210 and vinyl-vinyl acetate copolymer EVM moral
State's Baeyer second Warburg Pincus 450, weight part ratio 1:1.
The vulcanizing agent is cumyl peroxide.
The co-curing agent is triallylcyanurate.
The coupling agent is vinyltriethoxysilane.
The anti-aging agent includes activated zinc oxide and alkylated diphenylamine compound, weight part ratio 1:1.2.
The softening agent is high viscosity cylinder oil.
The anti-irradiation agent includes dysprosia and boron phosphide, weight part ratio 1:0.8.
The anti-hydrolysis agent includes tribasic lead stearate and poly- carbonic acid diimine, weight part ratio 1:0.9.
The conductive agent is conductive furnace black.
Embodiment 2
A kind of sea small cores reactor cable conductor shielding material, the component including following parts by weight:
KEP 510:60 parts of EPDM South Korea brocade lake；
450:40 parts of vinyl-vinyl acetate copolymer EVM Germany Baeyer second Warburg Pincus；
Vulcanizing agent dual-tert-butyl peroxy diisopropyl benzene: 4.5 parts；
Co-curing agent triallyl isocyanate: 3 parts；
Coupling agent vinyl-three-(beta-methoxy ethyoxyl) silane: 1 part；
Anti-aging agent activated zinc oxide: 3 parts；
Anti-aging agent alkylated diphenylamine compound: 4 parts；
Softening agent paraffin oil: 20 parts；
Anti-irradiation agent dysprosia: 1.5 parts；
Anti-irradiation agent boron phosphide: 2 parts；
The tribasic lead stearate of anti-hydrolysis agent: 2 parts；
The poly- carbonic acid diimine of anti-hydrolysis agent: 3 parts；
Conductive agent conduction furnace black: 120 parts.
The preparation method of above-mentioned nuclear reactor cable conductor shielding material includes the following steps:
(1) weighing weighs 60 parts of EPDM, 40 parts of vinyl-vinyl acetate copolymer EVM, 4.5 parts of vulcanizing agent, is total to
3 parts of vulcanizing agent, 1 part of coupling agent, 3 parts of anti-aging agent activated zinc oxide, 4 parts of anti-aging agent alkylated diphenylamine compound, softening agent 20
Part, 1.5 parts of anti-irradiation agent dysprosia, irradiation 2 parts of agent boron phosphide, 2 parts of the tribasic lead stearate of anti-hydrolysis agent, the poly- carbon of anti-hydrolysis agent
3 parts of sour diimine, 120 parts of conductive agent it is spare；
(2) it is kneaded, after being first kneaded base-material 2 minutes, half conductive agent and half softening agent is then added, then
Sequentially add coupling agent, anti-aging agent, anti-irradiation agent, anti-hydrolysis agent and remaining half conductive agent and half softening
Agent is kneaded after five minutes, is eventually adding successively vulcanizing agent and co-curing agent, is kneaded 2 minutes, and Bao Tong 7 times, entire mixing process
Roller temperature is controlled at 95~110 DEG C；
(3) slice.
The step (2) carries out on open mill, masticator or mixer, and step (3) carries out on a mill.
Experimental example:
2 gained conductor shielding material of embodiment is tested for the property, test item and the results are shown in Table 1:
Table 1
By 2 gained conductor shielding material of embodiment by method as defined in 60216 standard of IEC, pass through the old longevity assessment of material heat
Material lifetime and activation energy data are obtained, the heat for calculating cable equivalent simulation Thermal life evaluation further according to material activation energy data is old
Change condition, evaluation service life are all larger than 60 years.Above-mentioned conductor shielding material can small cores reactor lifetime period interior guarantee at sea
It remains to execute its function in design basis accident DBA and Post-DBA.
According to the above results it is found that conductor shielding material provided by the invention has resistance to long term heat ageing, radiation resistance and waterproof
The features such as, due to the selection of raw material of the present invention, it is also equipped with the characteristic of low smoke, zero halogen low toxicity.
Claims (10)
1. a kind of nuclear reactor midium voltage cable conductor shielding material, which is characterized in that according to parts by weight, including the following raw material group
Point:
Base-material: 100 parts；
Vulcanizing agent: 2~7 parts；
Co-curing agent: 1.5~6 parts；
Coupling agent: 0.5~5 part；
Anti-aging agent: 4~20 parts；
Softening agent: 4~40 parts；
Anti-irradiation agent: 1~18 part；
Anti-hydrolysis agent: 1~10 part；
Conductive agent: 80~250 parts；
Wherein, the base-material is EPDM and vinyl-vinyl acetate copolymer EVM, the weight ratio of the two be 1:0.5~
1.5。
2. nuclear reactor midium voltage cable conductor shielding material according to claim 1, which is characterized in that according to parts by weight,
Including the following raw material component:
Base-material: 100 parts；
Vulcanizing agent: 3~6 parts；
Co-curing agent: 2~5 parts；
Coupling agent: 1~4 part；
Anti-aging agent: 6~16 parts；
Softening agent: 6~30 parts；
Anti-irradiation agent: 2~15 parts；
Anti-hydrolysis agent: 2~8 parts；
Conductive agent: 100~200 parts.
3. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the ternary second
Third trade mark for selecting high ethylene, low Mooney, Third monomer content high, preferably 210 trade mark of South Korea's brocade lake KEP, ethylene contents 61.5
~67.5%, Mooney viscosity (ML1+4,125 DEG C) is 18~28, and Third monomer is ethylidene norbornene ENB, content 4.7
~6.7%；Or preferably 510 trade mark of South Korea's brocade lake KEP, ethylene contents 69~73%, Mooney viscosity (ML1+4,125 DEG C) are 18
~28, Third monomer is ethylidene norbornene ENB, and content is 5.7~6.7%.
4. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the ethylene-second
Vinyl acetate copolymer EVM selects vinyl acetate content to be greater than the high amorphous copolymer of the 45%, degree of branching, and preferably Germany is visitd
That second Warburg Pincus 450, vinyl acetate content 45%, Mooney viscosity (ML1+4,100 DEG C) are 20.
5. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the vulcanizing agent
For cumyl peroxide, 1,1- bis(t-butylperoxy) -3,3,5- trimethyl-cyclohexane or dual-tert-butyl peroxy two are different
One of propylbenzene；The co-curing agent is in paraquinonedioxime, triallyl isocyanate or triallylcyanurate
It is a kind of.
6. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the coupling agent
For γ-methacrylic acid trimethylene trimethoxy silane, vinyltriethoxysilane or vinyl-three-(beta-methoxy ethoxy
One of base) silane.
7. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the anti-aging agent
Including activated zinc oxide and alkylated diphenylamine compound, wherein the weight of activated zinc oxide and alkylated diphenylamine compound
Than for 1:0.5~1.5.
8. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the softening agent
For one of paraffin oil, Liquid Ethylene Propylene Methylene and high viscosity cylinder oil；The conductive agent is conductive furnace black.
9. nuclear reactor midium voltage cable conductor shielding material according to claim 1 or claim 2, which is characterized in that the Flouride-resistani acid phesphatase
Agent includes dysprosia and boron phosphide, and the weight ratio of the two is 1:0.5~1.5；The anti-hydrolysis agent includes tribasic lead stearate
With poly- carbonic acid diimine, the weight ratio of the two is 1:0.8~1.5.
10. a kind of preparation method of nuclear reactor cable conductor shielding material as described in claim 1, which is characterized in that packet
Include following steps:
(1) weighing weighs 100 parts of base-material, 2~7 parts of vulcanizing agent, 1.5~6 parts of co-curing agent, 0.5~5 part of coupling agent, anti-aging agent
4~20 parts, 4~40 parts of softening agent, 1~18 part of anti-irradiation agent, 1~10 part of anti-hydrolysis agent, 80~250 parts of conductive agent it is spare；
(2) it is kneaded, after being first kneaded base-material 1~2 minute, half conductive agent and half softening agent is then added, then
Sequentially add coupling agent, anti-aging agent, anti-irradiation agent, anti-hydrolysis agent and remaining half conductive agent and half softening
Agent is eventually adding successively vulcanizing agent and co-curing agent after being kneaded 3~6 minutes, is kneaded 2~3 minutes, and Bao Tong 5 times or more, entirely
The roller temperature of mixing process is controlled at 90~110 DEG C；
(3) slice；
Preferably, the step (2) carries out on open mill, masticator or mixer, and step (3) carries out on a mill.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110684268A (en) * | 2019-10-21 | 2020-01-14 | 尚纬股份有限公司 | Sheath material for marine small nuclear reactor cable and preparation method thereof |
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