CN105504480A - Oil-resistant irradiation-crosslinking low-smoke halogen-free flame-retardant polyolefin material for locomotive wires and cables - Google Patents
Oil-resistant irradiation-crosslinking low-smoke halogen-free flame-retardant polyolefin material for locomotive wires and cables Download PDFInfo
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- CN105504480A CN105504480A CN201610037152.8A CN201610037152A CN105504480A CN 105504480 A CN105504480 A CN 105504480A CN 201610037152 A CN201610037152 A CN 201610037152A CN 105504480 A CN105504480 A CN 105504480A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/06—Crosslinking by radiation
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Abstract
The invention relates to an oil-resistant irradiation-crosslinking low-smoke halogen-free flame-retardant polyolefin material for locomotive wires and cables, belonging to the technical field of high-polymer materials for wires and cables. The oil-resistant irradiation-crosslinking low-smoke halogen-free flame-retardant polyolefin material for locomotive wires and cables is prepared from the following raw materials in parts by weight: 50-80 parts of ethylene-vinyl acetate copolymer, 15-30 parts of high-polymer compatilizer, 5-25 parts of metallocene linear low density polyethylene, 120-150 parts of inorganic flame retardant, no more than 10 parts of flame-retardant synergist, 5-25 parts of electric property modifier, 2-5 parts of crosslinking assistant, 2-3 parts of antioxidant, no more than 1 part of copper inhibitor and 2-3 parts of lubricant. The polyolefin material has the advantages of low smoke, no halogen, environment friendliness, favorable oil corrosion resistance and favorable thermal aging resistance, is beneficial to ensuring excellent mechanical properties, electric properties and light transmittance, is beneficial to embodying ideal extrudability, and can enable the prepared wire and cable to satisfy the single vertical burning test or bunched cable burning test according to the standard requirements.
Description
Technical field
The invention belongs to electric wire technical field of polymer materials, be specifically related to a kind of Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material.
Background technology
Along with the development of track traffic, being applicable to ac rated voltage is that the cable of the electrical installation of the such as power distribution system, Controlling System, signalling system and so on of 3KV and following rail traffic vehicles also develops thereupon and is widely used.Because Locomotive engine cable is mainly used in the place of the personnel such as railcar, rolling stock Relatively centralized, again due to by the impact of environment for use, thus require that the cable being used in these occasions has oil resistant, heat-resisting, cold tolerance and good electric property; For personnel escape during fire, ensure carrying out smoothly of rescue work, cable material also requires to have certain flame retardant properties, and requires that low cigarette, halogen-free environmental, transmittance are good.As defined cross-linked polyolefin YJ-125 in GB GB/T12528 standard except need having excellent mechanical property, electric property, also must have good resistance to mineral oil, fuel oil resistance, heat-proof aging, resistance to low temperature and electric property, and require that finished product cable by single vertical combustion test or bunched cables combustion test, and need require (transmittance is not less than 70%) by cable smoke density.Consider from economy and point of view of practicability, Locomotive engine cable material mostly uses oil-resisting type irradiation crosslinking type low-smoke halogen-free flame-retardant polyolefin material.
The technical intelligence about oil-resisting type irradiation cross-linking low smoke halogen-free fire retardant polyolefin cable material can be seen in the disclosed Chinese patent literature of China, typical in application publication number CN101565527B (a kind of 125 DEG C irradiated crosslinking), CN102898716B (a kind of 150 DEG C of locomotive wires irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material and preparations thereof), CN103467837B (irradiated crosslinking low-smoke and halogen-free flame retardant ethylene vinyl acetate elastomerics and preparation method thereof) and CN103756121A (a kind of heatproof oil-resistant low-smoke halogen-free flame-retardant cross-linking radiation composite polyolefine material and preparation method thereof), etc..
Being not limited to the above-mentioned oil-resisting type irradiation cross-linking low smoke halogen-free fire retardant polyolefin cable material enumerated is all for base-material is by rationally adding corresponding functional aid to improve or embodying corresponding function with the ethylene vinyl acetate copolymer of ethylene vinyl acetate or grafting.CN101565527B as the aforementioned is by the ethylene vinyl acetate copolymer of ethylene vinyl acetate or grafting and amount of retardant mixing granulation, but most high flame retardant agent consumption is on the low side in formula system, the cable of more high flame retardant requirement can not be met, simultaneously because ethylene vinyl acetate copolymer melt temperature is lower, if base material all with it for system, make product to add man-hour viscosity large, the processing plasticizing time is restricted, result also in product, to squeeze Wiring technology bad, curtain coating or outer curtain coating phenomenon in occurring, affect extruded velocity, reduce production efficiency; And for example aforesaid CN102898716B, CN103756121A are owing to adding the surface treatment procedure of fire retardant in formula system, thus add production cost, reduce production efficiency.
In a word, oil-resisting type irradiation crosslinking type low-smoke halogen-free flame-retardant polyolefin material in prior art still can not meet at oil resistance, resistance toheat, scratch-resistant performance and combustionproperty aspects the demand that the requirement of GB GB/T12528 and 125 DEG C of Locomotive engine cables normally use, and the processing characteristics of technique also cannot meet the requirement of cable production firm.
In addition, because test oil such as mineral oil and fuel wet goods are non-polar material, thus in oil-resisting type irradiation cross-linking low smoke halogen-free fire retardant polyolefin cable material in the past, base material generally adopts the ethylene vinyl acetate (EVA) with polarity, ethylene ethyl acrylate copolymer (EEA), ethylene methyl acrylate copolymer (EMA), the melt temperature of these base materials is lower, below 100 DEG C, so, if be not cross-linked material, when so soaking mineral oil test at 100 DEG C, test piece meeting melting, rot, so only have the irradiation through high dosage and use the higher degree of crosslinking of embodiment and meet the desired oil resistant mechanical property.Because polyethylene (PE) is non-polar material, thus generally do not use in oil resistant system formulation, comonomer unit skewness between molecular linkage of common LLDPE (LLDPE), block distributed is inclined in molecular chain, because thermodynamic one easily causes being separated, after adding, oil-proofness is poor.
As shown in the above description, explore that oil resistance is excellent, heat aging property is desirable, mechanical property and electric property and the good processing characteristics simultaneously of flame retardant properties be improved and use the cable material of polyolefin fully meeting GB/T12528 standard-required and have positive effect, but be showed no in disclosed China and foreign countries' patent up to now and non-patent literature and allly have corresponding enlightenment.
For above-mentioned prior art, the applicant has done lasting and useful exploration, finally finds a way to resolve the problem, and defines technical scheme described below.
Summary of the invention
Task of the present invention is to provide a kind of and contributes to embodying good low smoke and zero halogen green environmental protection and oil resistant corrodibility and heat-resistant aging, be conducive to ensureing excellent mechanical property and electric property and transmittance, be of value to and embody desirable extrusion performance and the cable made can be made to meet the Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material of single vertical combustion test required by standard or bunched cables combustion test.
Task of the present invention has been come like this, a kind of Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material, and it is made up of the raw material of following proportioning by weight:
In a specific embodiment of the present invention, described ethylene vinyl acetate is that the quality % content of vinyl acetate between to for plastic is 25% ~ 40% and melting index is the ethylene vinyl acetate of 3.0g/10min ~ 7.0g/10min.
In another specific embodiment of the present invention, described high molecular weight compatibilizer is one or both in the ethylene-vinyl acetate copolymer of maleic anhydride graft and maleic anhydride graft Low Density Polyethylene.
In another specific embodiment of the present invention, the ethylene-vinyl acetate copolymer of described maleic anhydride graft by the quality % content of vinyl acetate between to for plastic be the base resin grafting of 28% and percentage of grafting is the ethylene-vinyl acetate copolymer of 1.0% ~ 2.0%.
In another specific embodiment of the present invention, described metallocene linear low density polyethylene (MLLDPE) is prepared by the catalysis of employing metallocene catalyst and melting index is 0.3 ~ 4.0g/10min ethylene-hexene co-polymers.
Also have in a specific embodiment of the present invention, described inorganic combustion inhibitor to be diameter the be aluminium hydroxide of less than 1.5 μm and diameter to be the combination of the magnesium hydroxide of less than 1.5 μm or diameter the be aluminium hydroxide of less than 1.5 μm and diameter are the hydromagnesite breeze [Mg of less than 1.5 μm
5(CO
3)
4(OH)
24H
2o] combination, wherein: the parts by weight of aluminium hydroxide are 90-130 part, the parts by weight of magnesium hydroxide are≤40 parts, and the weight part of hydromagnesite breeze is≤40 parts, and when magnesium hydroxide is zero, hydromagnesite breeze is non-vanishing, and when magnesium hydroxide is non-vanishing, then hydromagnesite breeze is zero.
More of the present invention and in a specific embodiment, described fire retarding synergist is zinc borate or borophosphoric acid.
In an of the present invention and then specific embodiment, described electric property properties-correcting agent is the one in silicates powder body material.
Of the present invention again more and in a specific embodiment, described crosslinking coagent is double bond containing polyfunctional monomer, and this double bond containing polyfunctional monomer is more than one the mixture in trimethylolpropane tris propylene (TMPTA), trimethylolpropane trimethacrylate (TMPTMA), triallyl cyanurate (TAC), triallyl isocyanurate (TAIC).
In an again of the present invention and then specific embodiment, described oxidation inhibitor is β (3,5-di-tert-butyl-hydroxy phenyl) propylene pentaerythritol ester (antioxidant 1010), 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) (antioxidant 300), 3, more than one the combination in 3 '-propane thioic acid bay alcohol ester (anti-oxidant DLTP), composite antioxidant B215 or B225; Described anti-copper(greening)inhibitor is N, N '-bis-[β (3.5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine (MD1024); Described lubricant is one or more the combination in fatty acid amide (as stearic amide, amine hydroxybenzene, N, N '-ethylene bis stearic acid amide), polyethylene wax, silica flour, silicone master batch.
The advantage of technical scheme provided by the invention is as follows: due to raw material and reasonable ratio thereof, thus there is excellent resistance to mineral oil, fuel oil resistance, heat-resistant aging and expressing technique performance, and there is good mechanical property, electric property, the cable made can by single vertical combustion test or bunched cables combustion test, smoke density is low, transmittance is good, meets GB GB/T12528 standard-required, meets 125 DEG C of normal user demands of Locomotive engine cable; From in prior art with the ethylene vinyl acetate copolymer of ethylene vinyl acetate or grafting for base material is different, owing to have employed ethylene vinyl acetate, high molecular weight compatibilizer, MLLDPE tri-kinds of base materials in formula, and and fineness be the aluminium hydroxide of less than 1.5 microns and magnesium hydroxide, the hydromagnesite breeze [Mg of fineness to be less than 1.5 microns microtextures be laminate structure
5(CO
3)
4(OH)
24H
2o and Mg
3ca (CO
3)
4mixture; Become charcoal crust during hydromagnesite breeze high-temp combustion, promote flame retardant effect; Adding of electric property properties-correcting agent, improve the electric property of product; Adding of MLLDPE does not affect oil-proofness and makes moderate progress to electric property, mechanical property, resistance toheat and processing characteristics; The blending dispersion adding other component making itself and inorganic combustion inhibitor of high molecular weight compatibilizer evenly better with combination, thus obtains better consistency and other over-all properties.
Embodiment
Technical spirit of the present invention is clearly understood for the ease of the public, spy is described in detail in conjunction with the embodiments, but embodiment does not form the restriction to the present invention program, although the electric property properties-correcting agent such as described in applicant only lists the potter's clay belonging to silicates powder body material category, do not get rid of other and belong to material in the powder body material of silicates.
Based on above-mentioned reason, all kinds of macromolecular materials, fire retardant, fire retarding synergist, lubricant etc. mentioned by applicant are also right, all can not limit the present invention thus.
Embodiment 1:
In the formula system of the present embodiment, part employs MLLDPE, mix with fire retardant with ethylene vinyl acetate, high molecular weight compatibilizer, consistency is better, as long as there is appropriate irradiation dose, product is well cross-linked, good oil resistant mechanical property can be obtained, because the metallocene linear low density polyethylene of metallocene catalysis (MLLDPE) has different geometric configuration from LLDPE, comonomer is evenly distributed between molecular linkage, there is composition distribution in uniform molecule, molecular weight distribution is narrower, and arranged evenly more tight in crystallization, degree of crystallinity is higher; Its fusing point is between 110 DEG C ~ 130 DEG C simultaneously, when not having full cross-linked, and also non-melting at high temperature 100 DEG C, thus under preventing high temperature (100 DEG C), oil molecule enters.MLLDPE has excellent physical and mechanical properties, electric property, and proportion is little, generally at 0.918g/cm
3~ 0.935g/cm
3, and general conventional vinyl acetate content is that the proportion of the ethylene vinyl acetate of 28% is at 0.948g/cm
3above, the present embodiment owing to introducing MLLDPE, thus improves the mechanical property of CABLE MATERIALS, electric property, oil resistance, resistance toheat in formula, reduces the proportion of CABLE MATERIALS product, reduces product viscosity, improve complete processing.Meet GB GB/T12528 standard-required and 125 DEG C of normal user demands of Locomotive engine cable.
During preparation, first each component of above-described embodiment 1 is added in high-speed kneading machine and mix, be then transferred to twin screw extruder and melt extrude, through cooling also pelletizing, obtain Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material; Or first add Banbury mixer and carry out banburying, then proceed to twin screw extruder and melt extrude.The each component of plastics makes Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin plastic pellet through mixing, plasticizing, granulation.
Embodiment 2:
In the present embodiment, NM content is with the description to embodiment 1.
Embodiment 3:
In the present embodiment, NM content is with the description to embodiment 1.
Embodiment 4:
In the present embodiment, NM content is with the description to embodiment 1.
Embodiment 5:
In the present embodiment, NM content is with the description to embodiment 1.
The Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material that obtained by above-described embodiment 1 to 5 (extrusion or carry out cross-linking radiation through rumbatron after being extruded into cable) has the performance index shown in following table after tested:
Claims (10)
1. a Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material, is characterized in that it is made up of the raw material of following proportioning by weight:
Ethylene vinyl acetate 50 ~ 80 parts;
High molecular weight compatibilizer 15 ~ 30 parts;
Metallocene linear low density polyethylene 5 ~ 25 parts;
Inorganic combustion inhibitor 120 ~ 150 parts;
Fire retarding synergist≤10 part;
Electric property properties-correcting agent 5 ~ 25 parts;
Crosslinking coagent 2 ~ 5 parts;
2 ~ 3 parts, oxidation inhibitor;
Anti-copper(greening)inhibitor≤1 part;
Lubricant 2 ~ 3 parts.
2. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, is characterized in that described ethylene vinyl acetate is that the quality % content of vinyl acetate between to for plastic is 25% ~ 40% and melting index is the ethylene vinyl acetate of 3.0g/10min ~ 7.0g/10min.
3. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, is characterized in that described high molecular weight compatibilizer is one or both in the ethylene-vinyl acetate copolymer of maleic anhydride graft and maleic anhydride graft Low Density Polyethylene.
4. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 3, it is characterized in that the ethylene-vinyl acetate copolymer of described maleic anhydride graft by the quality % content of vinyl acetate between to for plastic be the base resin grafting of 28% and percentage of grafting is the ethylene-vinyl acetate copolymer of 1.0% ~ 2.0%.
5. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, is characterized in that described metallocene linear low density polyethylene is prepared by the catalysis of employing metallocene catalyst and melting index is 0.3 ~ 4.0g/10min ethylene-hexene co-polymers.
6. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, it is characterized in that described inorganic combustion inhibitor to be diameter be the aluminium hydroxide of less than 1.5 μm and diameter to be the combination of the magnesium hydroxide of less than 1.5 μm or diameter be that the aluminium hydroxide of less than 1.5 μm and diameter are the combination of the hydromagnesite breeze of less than 1.5 μm, wherein: the parts by weight of aluminium hydroxide are 90-130 part, the parts by weight of magnesium hydroxide are≤40 parts, and the weight part of hydromagnesite breeze is≤40 parts, and when magnesium hydroxide is zero, hydromagnesite breeze is non-vanishing, and when magnesium hydroxide is non-vanishing, then hydromagnesite breeze is zero.
7. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, is characterized in that described fire retarding synergist is zinc borate or borophosphoric acid.
8. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, is characterized in that described electric property properties-correcting agent is the one in silicates powder body material.
9. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, it is characterized in that described crosslinking coagent is double bond containing polyfunctional monomer, this double bond containing polyfunctional monomer is more than one the mixture in trimethylolpropane tris propylene, trimethylolpropane trimethacrylate, triallyl cyanurate, triallyl isocyanurate.
10. Locomotive engine cable oil resistant irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material according to claim 1, it is characterized in that described oxidation inhibitor is β (3,5-di-tert-butyl-hydroxy phenyl) propylene pentaerythritol ester, 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol), 3, more than one the combination in 3 '-propane thioic acid bay alcohol ester, composite antioxidant B215 or B225; Described anti-copper(greening)inhibitor is N, N '-bis-[β (3.5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine; Described lubricant is one or more the combination in fatty acid amide, polyethylene wax, silica flour, silicone master batch.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117764A (en) * | 2016-06-27 | 2016-11-16 | 中广核三角洲（苏州）高聚物有限公司 | Oil resistant wear-resisting low-temperature type locomotive cable irradiation crosslinking halogen-free fire-resistant cable material |
| CN106590006A (en) * | 2016-12-07 | 2017-04-26 | 安徽合聚阻燃新材料股份有限公司 | Class-B flame-retarding irradiation crosslinking halogen-free low-smoke insulated cable material |
| CN108059761A (en) * | 2017-12-11 | 2018-05-22 | 上海至正道化高分子材料股份有限公司 | A kind of 125 DEG C of cross-linking radiation photovoltaic cable flame-retardant sheath materials and preparation method thereof |
| CN108164806A (en) * | 2017-12-27 | 2018-06-15 | 上海至正道化高分子材料股份有限公司 | Locomotive engine cable irradiated crosslinking low-smoke and halogen-free flame retardant polyolefin material and preparation method thereof |
| CN108239330A (en) * | 2016-12-27 | 2018-07-03 | 上海凯波特种电缆料厂有限公司 | A kind of automotive line irradiated crosslinking low-smoke and halogen-free flame retardant material and preparation method thereof |
| CN108239329A (en) * | 2016-12-27 | 2018-07-03 | 上海凯波特种电缆料厂有限公司 | A kind of thermosetting property bittern-free flame-proof material and preparation method thereof |
| CN110746682A (en) * | 2019-11-14 | 2020-02-04 | 苏州铂玛新材料有限公司 | Oil-resistant irradiation crosslinked wire and cable material for rail transit vehicles and preparation method thereof |
| CN110903539A (en) * | 2019-12-05 | 2020-03-24 | 广东安拓普聚合物科技有限公司 | Ultraviolet irradiation low-smoke halogen-free material for optical cable |
| CN113150431A (en) * | 2021-05-17 | 2021-07-23 | 南京中超新材料股份有限公司 | 125 ℃ low-smoke halogen-free polyolefin cable material for locomotive wires and preparation method thereof |
| CN114213740A (en) * | 2021-12-09 | 2022-03-22 | 乐庭电线工业（惠州）有限公司 | Polyolefin flame-retardant insulating rubber material and cable resistant to long-term aging at 125 ℃ and preparation method thereof |
| CN114213741A (en) * | 2021-12-09 | 2022-03-22 | 中广核三角洲（江苏）塑化有限公司 | Hot-water-resistant oil-resistant thermoplastic low-smoke halogen-free flame-retardant polyolefin cable material |
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