CN106854313A - A kind of nuclear grade cable of single-layer insulation material - Google Patents
A kind of nuclear grade cable of single-layer insulation material Download PDFInfo
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- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
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- 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
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- 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
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
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- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention provides a kind of nuclear grade cable of single-layer insulation material, including cable core and the single-layer insulation material for coating the cable core, wherein, single-layer insulation material includes following components in percentage by weight：10%~20% ethylene propylene diene rubber, 45%~65% pretreatment fire retardant, 1%~5% compatilizer, 1%~3% stabilization agent, 1%~3% silicone master batch and 1%~2% silane coupler.A kind of nuclear grade cable of single-layer insulation material that the present invention is provided, its insulating materials uses single layer structure, and one layer of extrusion cladding is only needed to when cable is produced.By using ethylene propylene diene rubber as the main base material of the single-layer insulation material, so that insulating materials has excellent weatherability, ozone resistance, heat-resistant aging, good electrical insulating property and resistant to chemical media corrosivity, certain silane coupler is added to pre-process by material, so that the water absorption resistance of insulating materials is strengthened, hence in so that insulaion resistance constant is big.
Description
Technical field
The present invention relates to the technical field of cable insulation material, more particularly to a kind of nuclear grade cable of single-layer insulation material.
Background technology
Nuclear grade cable is nuclear island building of nuclear power plant 1E grades of loop cable, and its conventional kind has：6/10KV and 0.6/1KV power cables, 0.6/1KV controls cable, 300/500V instrument and thermocouple compensation cable.As the development and the continuous improvement of nuclear power station intelligent level of computer technology, its cable kind are also constantly expanding, new nuclear power station increased the kinds such as fiber optic cables, digital cable, communication cable and broadcasting cable again.And according to French Nuclear Power standard《The Machine Design of presurized water reactor nuclear island and construction rule》Nuclear grade cable can be then divided into following three-level by (abbreviation RCC-E)：K1 grades：In containment, it is desirable to the cable of function is kept under nominal situation, accident and post accident environment condition and seismic (seismal；K2 grades：In containment, it is desirable to the cable of its function can be performed under nominal situation and seismic (seismal；K3 grades：Outside containment, it is desirable to the cable of its function can be performed under nominal situation and seismic (seismal.
At present under the background of " severe power shortage, coal shortage, oil are waste " energy shortage, China is turned into using nuclear energy power generation and has solved one of important channel of energy shortage and environmental problem.Clearly Development Stratagem Of Nuclear Power is adjusted to " actively development " by " optimum development " in the Eleventh Five-Year Plan of country.The prosperity of the nuclear power development space wide for cable for nuclear power station brings, and nuclear grade cable insulation core wire generally uses individual layer cross-linked polyolefin or individual layer fire-retardant polyolefine material at present, or use two-layer composite, i.e. internal layer uses low-smoke halide-free fireproof composite polyolefine material using cross-linked polyolefin insulating materials, outer layer, but is to be difficult to meet the requirements such as the operating temperature of nuclear cables, short-circuit temperature, life cycle, insulaion resistance, flame-retarding characteristic and physical dimension comprehensively by the nuclear grade cable insulation core wire that these materials are produced.
The content of the invention
It is an object of the invention to provide a kind of nuclear grade cable of single-layer insulation material, it is used to solve the problems, such as that the insulating materials of nuclear grade cable insulation core wire in the prior art is difficult to meet the property requirements of nuclear cables.
The invention provides a kind of nuclear grade cable of single-layer insulation material, including cable core and the single-layer insulation material for coating the cable core, wherein, single-layer insulation material includes following components in percentage by weight：10%~20% ethylene propylene diene rubber, 45%~65% pretreatment fire retardant, 1%~5% compatilizer, 1%~3% stabilization agent, 1%~3% silicone master batch and 1%~2% silane coupler.
Further, single-layer insulation material also includes following components in percentage by weight：Less than 5% thermoplastic elastomer (TPE) and less than 10% polyethylene.
Further, ethylene propylene diene rubber is consisted of the following components in percentage by weight：60%~70% ethene, 40%~30% propylene and 1%~3% ethylidene bornylene.
Further, pretreatment fire retardant is for active aluminium hydroxide or by the aluminium hydroxide that percentage by weight is 60%~80% and the component that 20%~40% magnesium hydroxide is constituted.
Further, compatilizer is maleic anhydride grafted polyethylene, and grafting rate is 1~2%.
Further, stabilization agent is consisted of the following components in percentage by weight：35%~55% calcium stearate, 5%~35% zinc stearate and the four of 35%~60% [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol esters.
Beneficial effect using the invention described above technical scheme is：A kind of nuclear grade cable of single-layer insulation material that the present invention is provided, its insulating materials uses single layer structure, and one layer of extrusion cladding is only needed to when cable is produced.By using ethylene propylene diene rubber as the main base material of the single-layer insulation material, so that insulating materials has excellent weatherability, ozone resistance, heat-resistant aging, good electrical insulating property and resistant to chemical media corrosivity, and relative density is low, loading is big and with good radiation-resistant property.By adding pretreatment fire retardant, the mechanical property and processability of material, enable the cable insulation heart yearn of single layer structure by single vertical combustion test during such that it is able to improving filling high.Pre-processed by adding 1%~2% silane coupler to material, so that the water absorption resistance of insulating materials is strengthened, therefore material is during immersion, water absorption is reduced, material is absorbed water and quickly reach saturation state, so that insulaion resistance constant is big such that it is able to reach the value of prescribed by standard.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.
The embodiment of the invention discloses a kind of nuclear grade cable of single-layer insulation material, including cable core and the single-layer insulation material for coating the cable core, wherein, the single-layer insulation material can include following components in percentage by weight：10%~20% ethylene propylene diene rubber, 45%~65% pretreatment fire retardant, 1%~5% compatilizer, 1%~3% stabilization agent, 1%~3% silicone master batch and 1%~2% silane coupler.In the present embodiment, the single-layer insulation material can also include following components in percentage by weight：Less than 5% thermoplastic elastomer (TPE) and less than 10% polyethylene.Wherein, thermoplastic elastomer (TPE) (Thermoplastic Elastomer, abbreviation TPE) its ethylene-propylene copolymer molecular weight is 10~200,000, Mooney viscosity (100 DEG C) 30~60, hardness shore A30~60, melt index (190 DEG C, 2.16kg) 1~5g/10min；Polyethylene is high density polyethylene (HDPE), molecular weight 5~150,000, melt index (190 DEG C, 2.16kg) 1~5g/10min.
The embodiment of the invention also discloses the preparation method of above-mentioned single-layer insulation material, the method may include steps of：
Step one, fire retardant that percentage by weight is 45%~65%, 1%~2% silane coupler are stirred machine and stirred 5~10 minutes by height, are pre-processed with to component；
Step 2, ethylene propylene diene rubber, 1%~5% compatilizer, 1%~3% stabilization agent and 1%~3% silicone master batch for adding percentage by weight to be 10%~20% is mixed；
Step 3, by mixed component by banbury melt blending, is then made particle by single screw extrusion machine；
Step 4, cross-linking radiation is carried out by the particle by electron accelerator into wire rod by wire rod extrusion mechanism to the wire rod.
In the above embodiment of the present invention, the temperature that banbury is melted is 160~175 DEG C, the time is 15~25 minutes.Single screw extrusion machine includes the firstth area, the secondth area, the 3rd area, the 4th area, the 5th area, the 6th area and the SECTOR-SEVEN that are sequentially connected, each area is passed sequentially through by the component after banbury melt blending, wherein, the operating temperature in the firstth area is 110~115 DEG C, the operating temperature in the secondth area is 115~120 DEG C, the operating temperature in the 3rd area is 115~120 DEG C, the operating temperature in the 4th area is 120~125 DEG C, the operating temperature in the 5th area is 120~125 DEG C, the operating temperature in the 6th area is 120~130 DEG C, and the operating temperature of SECTOR-SEVEN is 125~130 DEG C.
Wire rod extruder includes the A areas, B areas, C areas and the D areas that are sequentially connected, allow that particle passes sequentially through A areas, B areas, C areas and D areas, wherein, the operating temperature in A areas is 150~160 DEG C, the operating temperature in B areas is 165~175 DEG C, the operating temperature in C areas is 165~175 DEG C, and the operating temperature in D areas is 170~180 DEG C.
The technical scheme of insulating materials in the present invention is further illustrated below by way of specific embodiment：
Embodiment one
1st, fire retardant that percentage by weight is 65%, 1% silane coupler are stirred into machine by height stir and pre-processed with to component for 10 minutes；
2nd, ethylene propylene diene rubber, 5% compatilizer, 2% stabilization agent, 2% silicone master batch, 10% polyethylene and 5% thermoplastic elastomer (TPE) for adding percentage by weight to be 10% are mixed；
3rd, by mixed component by banbury melt blending, wherein, the temperature that banbury is melted is 160 DEG C, the time is 25 minutes；Then particle is made by single screw extrusion machine；Wherein, the operating temperature in the area of single screw extrusion machine first is 110 DEG C, the operating temperature in the secondth area is 115 DEG C, the operating temperature in the 3rd area is 115 DEG C, the operating temperature in the 4th area is 120 DEG C, the operating temperature in the 5th area is 120 DEG C, and the operating temperature in the 6th area is 120 DEG C, and the operating temperature of SECTOR-SEVEN is 125 DEG C.
4th, particle is passed through into wire rod extrusion mechanism into wire rod, cross-linking radiation is carried out to wire rod by electron accelerator, so as to complete production process.Wherein, the operating temperature in wire rod extruder A areas is 150 DEG C, and the operating temperature in B areas is 165 DEG C, and the operating temperature in C areas is 165 DEG C, and the operating temperature in D areas is 170 DEG C.
Embodiment two
1st, fire retardant that percentage by weight is 60%, 1.5% silane coupler are stirred into machine by height stir and pre-processed with to component for 7.5 minutes；
2nd, ethylene propylene diene rubber, 2.5% compatilizer, 3% stabilization agent, 3% silicone master batch, 10% polyethylene and 5% thermoplastic elastomer (TPE) for adding percentage by weight to be 15% are mixed；
3rd, by mixed component by banbury melt blending, wherein, the temperature that banbury is melted is 170 DEG C, the time is 20 minutes；Then particle is made by single screw extrusion machine；Wherein, the operating temperature in the area of single screw extrusion machine first is 112.5 DEG C, the operating temperature in the secondth area is 117.5 DEG C, the operating temperature in the 3rd area is 117.5 DEG C, the operating temperature in the 4th area is 122.5 DEG C, the operating temperature in the 5th area is 122.5 DEG C, and the operating temperature in the 6th area is 125 DEG C, and the operating temperature of SECTOR-SEVEN is 127.5 DEG C.
4th, particle is passed through into wire rod extrusion mechanism into wire rod, cross-linking radiation is carried out to wire rod by electron accelerator, so as to complete production process.Wherein, the operating temperature in wire rod extruder A areas is 155 DEG C, and the operating temperature in B areas is 170 DEG C, and the operating temperature in C areas is 170 DEG C, and the operating temperature in D areas is 175 DEG C.
Embodiment three
1st, fire retardant that percentage by weight is 65%, 2% silane coupler are stirred into machine by height stir and pre-processed with to component for 5 minutes；
2nd, ethylene propylene diene rubber, 1% compatilizer, 1% stabilization agent, 1% silicone master batch and 10% polyethylene for adding percentage by weight to be 20% are mixed；
3rd, by mixed component by banbury melt blending, wherein, the temperature that banbury is melted is 175 DEG C, the time is 15 minutes；Then particle is made by single screw extrusion machine；Wherein, the operating temperature in the area of single screw extrusion machine first is 115 DEG C, the operating temperature in the secondth area is 120 DEG C, the operating temperature in the 3rd area is 120 DEG C, the operating temperature in the 4th area is 125 DEG C, the operating temperature in the 5th area is 125 DEG C, and the operating temperature in the 6th area is 130 DEG C, and the operating temperature of SECTOR-SEVEN is 130 DEG C.
4th, particle is passed through into wire rod extrusion mechanism into wire rod, cross-linking radiation is carried out to wire rod by electron accelerator, so as to complete production process.Wherein, the operating temperature in wire rod extruder A areas is 160 DEG C, and the operating temperature in B areas is 175 DEG C, and the operating temperature in C areas is 175 DEG C, and the operating temperature in D areas is 180 DEG C.
Example IV
1st, fire retardant that percentage by weight is 55%, 2% silane coupler are stirred into machine by height stir and pre-processed with to component for 7 minutes；
2nd, ethylene propylene diene rubber, 5% compatilizer, 3% stabilization agent, 3% silicone master batch, 7% polyethylene and 5% thermoplastic elastomer (TPE) for adding percentage by weight to be 20% are mixed；
3rd, by mixed component by banbury melt blending, wherein, the temperature that banbury is melted is 165 DEG C, the time is 22 minutes；Then particle is made by single screw extrusion machine；Wherein, the operating temperature in the area of single screw extrusion machine first is 112 DEG C, the operating temperature in the secondth area is 116 DEG C, the operating temperature in the 3rd area is 116 DEG C, the operating temperature in the 4th area is 123 DEG C, the operating temperature in the 5th area is 123 DEG C, and the operating temperature in the 6th area is 128 DEG C, and the operating temperature of SECTOR-SEVEN is 128 DEG C.
4th, particle is passed through into wire rod extrusion mechanism into wire rod, cross-linking radiation is carried out to wire rod by electron accelerator, so as to complete production process.Wherein, the operating temperature in wire rod extruder A areas is 152 DEG C, and the operating temperature in B areas is 168 DEG C, and the operating temperature in C areas is 168 DEG C, and the operating temperature in D areas is 172 DEG C.
Embodiment five
1st, fire retardant that percentage by weight is 52%, 2% silane coupler are stirred into machine by height stir and pre-processed with to component for 8 minutes；
2nd, ethylene propylene diene rubber, 5% compatilizer, 3% stabilization agent, 3% silicone master batch, 10% polyethylene and 5% thermoplastic elastomer (TPE) for adding percentage by weight to be 20% are mixed；
3rd, by mixed component by banbury melt blending, wherein, the temperature that banbury is melted is 172 DEG C, the time is 18 minutes；Then particle is made by single screw extrusion machine；Wherein, the operating temperature in the area of single screw extrusion machine first is 114 DEG C, the operating temperature in the secondth area is 118 DEG C, the operating temperature in the 3rd area is 118 DEG C, the operating temperature in the 4th area is 123 DEG C, the operating temperature in the 5th area is 123 DEG C, and the operating temperature in the 6th area is 128 DEG C, and the operating temperature of SECTOR-SEVEN is 128 DEG C.
4th, particle is passed through into wire rod extrusion mechanism into wire rod, cross-linking radiation is carried out to wire rod by electron accelerator, so as to complete production process.Wherein, the operating temperature in wire rod extruder A areas is 158 DEG C, and the operating temperature in B areas is 172 DEG C, and the operating temperature in C areas is 172 DEG C, and the operating temperature in D areas is 178 DEG C.
Specifically, in embodiments of the present invention, ethylene propylene diene rubber (Ethylene Propylene Diene Monomer, abbreviation EPDM) can be using the component being made up of following percentage by weight：60%~70% ethene, 40%~30% propylene and 1%~3% ethylidene bornylene.Its molecular weight is 5~150,000, Mooney viscosity (100 DEG C) 30~70, hardness shore A20~50.Because ethylene propylene diene rubber is a kind of non-crystal ethene copolymer, with excellent weatherability, ozone resistance, heat-resistant aging, good electrical insulating property and resistant to chemical media corrosivity, and relative density is low, loading is big and with good radiation-resistant property.Therefore, the present invention uses ethylene propylene diene rubber as the main base material of the single-layer insulation material of nuclear grade cable.
In embodiments of the present invention, pretreatment fire retardant can use aluminium hydroxide or can use the component being made up of for 60%~80% aluminium hydroxide and 20%~40% magnesium hydroxide percentage by weight.The present embodiment is in order that cable insulation heart yearn passes through single vertical combustion test, finished cable passes through IEC60332-3 B class bunched burning tests, realize low smoke and zero halogen simultaneously, so as to employ with aluminium hydroxide, flame-retardant system based on magnesium hydroxide, and add a small amount of collaboration efficient flame-retarding agent, aluminium hydroxide is improved simultaneously, the compatibility and dispersiveness of the conventional flame retardants such as magnesium hydroxide and base material, the mechanical property and processability of material during improving filling high, enable the cable insulation heart yearn of single layer structure by single vertical combustion test, its oxygen index (OI) OI >=32, smoke density light transmittance >=92%.
Compatilizer can use maleic anhydride grafted polyethylene, and grafting rate is 1~2%.Stabilization agent can be using the component being made up of following percentage by weight：35%~55% calcium stearate, 5%~35% zinc stearate and the four of 35%~60% [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol esters.
Because the requirement in RCC-E to the insulaion resistance performance indications of K3 grades of nuclear grade cable being insulaion resistance constant k values is：During 20 DEG C of environment temperatures >=3670M Ω KM；During 90 DEG C of maximum operating temperatures >=3.67M Ω KM.For non-flame resistant crosslinked polyolefin materials, dielectric constant k values easily reach above-mentioned regulation, but the specific insulation of most of fire retardant polyolefin insulating materials is only 1.0 × 1013 Ω cm or so, insulaion resistance constant k values are extremely difficult to above-mentioned requirements under Riddled Condition.Therefore, in the present embodiment, required to reach the standard of insulaion resistance constant k values, associated materials can be pre-processed, add 1%~2% silane coupler, machine is stirred by height to stir 5-10 minutes, so that the water absorption resistance of insulating materials is strengthened, therefore material is during immersion, water absorption is reduced, material is absorbed water and quickly reach saturation state so that insulaion resistance constant k values at 20 DEG C >=6000M Ω KM, during 90 DEG C of maximum operating temperatures >=20M Ω KM.
When cable for nuclear power station is subject to a large amount of gamma-rays, cable insulation material can be made to become fragile, mechanical degradation.Accordingly, as the insulating materials of cables of nuclear power, it is necessary to have good radioresistance.The molecular structure of base polymer in cable material, conclusive effect is played for the quality of the radiation-resistant property of cable material, and with the increase of irradiation dose, its elongation can decline different base polymers.Therefore, select suitable basic material particularly important to radioresistance in formulating.The Flouride-resistani acid phesphatase of EP rubbers is well more many than the Flouride-resistani acid phesphatase of polyethylene kind copolymer, it is simultaneously aging in order to prevent EP rubbers polymeric material to be subject to radioactive ray to occur after irradiating, anti-irradiation agent can be added in formula, further to improve the radioresistance of insulating materials.2Mrad can also be irradiated on electron accelerator every 24 hours in radiation aging experiment is simulated to insulating materials, 86Mard is irradiated altogether, the residual rate of elongation still has 56% after radiation aging, and does not ftracture.
The nuclear grade cable of the single-layer insulation material produced by the above method of the present invention, its flexibility is good, with not ftractureed after good tear resistance, water absorption resistance, excellent insulaion resistance, high flame retardant, thermal life degradation and radioresistance is good, standard requirement can be met using the property of the mechanical performance of the finished cable of single layer structure, electric property and nuclear grade cable.Therefore, the nuclear grade cable of single-layer insulation material provided in an embodiment of the present invention, its insulating materials uses single layer structure, and one layer of extrusion cladding is only needed to when cable is produced.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although being described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent to which part or all technical characteristic；And these modifications or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (6)
1. a kind of nuclear grade cable of single-layer insulation material, it is characterised in that including cable core and cladding institute
The single-layer insulation material of cable core is stated, the single-layer insulation material includes following components in percentage by weight：
10%~20% ethylene propylene diene rubber, 45%~65% pretreatment fire retardant, 1%~5% compatilizer,
1%~3% stabilization agent, 1%~3% silicone master batch and 1%~2% silane coupler.
2. the nuclear grade cable of a kind of single-layer insulation material according to claim 1, it is characterised in that
The single-layer insulation material also includes following components in percentage by weight：Less than 5% thermoplastic elastomer (TPE) with
And less than 10% polyethylene.
3. a kind of nuclear grade cable of single-layer insulation material according to claim 1 and 2, its feature exists
In the ethylene propylene diene rubber is consisted of the following components in percentage by weight：60%~70% ethene,
40%~30% propylene and 1%~3% ethylidene bornylene.
4. a kind of nuclear grade cable of single-layer insulation material according to claim 1 and 2, its feature exists
In, the pretreatment fire retardant be active aluminium hydroxide or by hydrogen-oxygen that percentage by weight is 60%~80%
Change the component of aluminium and 20%~40% magnesium hydroxide composition.
5. a kind of nuclear grade cable of single-layer insulation material according to claim 1 and 2, its feature exists
In the compatilizer is maleic anhydride grafted polyethylene, and grafting rate is 1~2%.
6. a kind of nuclear grade cable of single-layer insulation material according to claim 1 and 2, its feature exists
In the stabilization agent is consisted of the following components in percentage by weight：35%~55% calcium stearate, 5%~
35% zinc stearate and the four of 35%~60% [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester]
Pentaerythritol ester.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112029201A (en) * | 2020-09-08 | 2020-12-04 | 瑞安复合材料(深圳)有限公司 | Chemical corrosion resistant insulating material and preparation method thereof |
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| CN103524896A (en) * | 2013-09-30 | 2014-01-22 | 江苏达胜高聚物有限公司 | Halogen-free insulated cable material for irradiation crosslinking EPCV photovoltaics at temperature of 125 DEG C and preparation method |
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| CN112029201A (en) * | 2020-09-08 | 2020-12-04 | 瑞安复合材料(深圳)有限公司 | Chemical corrosion resistant insulating material and preparation method thereof |
| CN112029201B (en) * | 2020-09-08 | 2022-12-13 | 瑞安复合材料(深圳)有限公司 | Chemical corrosion resistant insulating material and preparation method thereof |
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Application publication date: 20170616 |