CN111647223A - Wire and cable sheath material for high-speed railway and preparation method thereof - Google Patents
Wire and cable sheath material for high-speed railway and preparation method thereof Download PDFInfo
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- CN111647223A CN111647223A CN202010612381.4A CN202010612381A CN111647223A CN 111647223 A CN111647223 A CN 111647223A CN 202010612381 A CN202010612381 A CN 202010612381A CN 111647223 A CN111647223 A CN 111647223A
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- 239000000463 material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title description 8
- -1 polysiloxane Polymers 0.000 claims abstract description 25
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 19
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 18
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 18
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- OHRVBDRGLIWLPA-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] dihydrogen phosphate Chemical compound OCC(CO)(CO)COP(O)(O)=O OHRVBDRGLIWLPA-UHFFFAOYSA-N 0.000 claims abstract description 17
- BQPNUOYXSVUVMY-UHFFFAOYSA-N [4-[2-(4-diphenoxyphosphoryloxyphenyl)propan-2-yl]phenyl] diphenyl phosphate Chemical compound C=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OP(=O)(OC=1C=CC=CC=1)OC1=CC=CC=C1 BQPNUOYXSVUVMY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000006229 carbon black Substances 0.000 claims abstract description 17
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 17
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 17
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 17
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 17
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 17
- 125000003944 tolyl group Chemical group 0.000 claims abstract description 17
- 239000004014 plasticizer Substances 0.000 claims abstract description 16
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 9
- FPAZNLSVMWRGQB-UHFFFAOYSA-N 1,2-bis(tert-butylperoxy)-3,4-di(propan-2-yl)benzene Chemical compound CC(C)C1=CC=C(OOC(C)(C)C)C(OOC(C)(C)C)=C1C(C)C FPAZNLSVMWRGQB-UHFFFAOYSA-N 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 claims description 2
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000779 smoke Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 abstract description 4
- 239000003063 flame retardant Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000012024 dehydrating agents Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000002195 synergetic effect Effects 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
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a wire and cable sheath material for a high-speed railway, which comprises the following raw materials in parts by weight: 20-30 parts of linear low-density polyethylene, 15-20 parts of metallocene polyethylene, 30-40 parts of ethylene-vinyl acetate copolymer, 35-50 parts of magnesium hydroxide, 2-4 parts of white carbon black, 5-8 parts of bisphenol A-bis (diphenyl phosphate), 2-3 parts of pentaerythritol phosphate, 3-4 parts of melamine cyanurate, 2-3 parts of methyl phenyl polysiloxane, 1-2 parts of silane coupling agent, 1-2 parts of di-tert-butyl peroxydicumyl benzene, 0.5-1 part of triallyl isocyanurate, 3-10 parts of plasticizer and 0.5-1 part of antioxidant. The material disclosed by the invention can meet the requirements of low-smoke halogen-free flame retardance, has high mechanical strength, good toughness and excellent chemical stability and water resistance, and is suitable for being applied to high-speed railway wire and cable sheath materials.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a wire and cable sheath material for a high-speed railway and a preparation method thereof.
Background
In recent years, with the development of the construction of the high-speed railway in China and the improvement of the technical level, in order to ensure the safe reliability of the operation of railway vehicles, higher requirements are also put on the wire and cable materials for electric power, control, signals and the like. In order to improve the safety, the cable sheath material is required to have extremely high halogen-free flame retardant performance. At present, in order to meet the requirements of low-smoke halogen-free flame retardance, a large amount of inorganic filling type flame retardants such as magnesium hydroxide are usually added, so that not only is the mechanical performance adversely affected, but also the water absorption rate is increased, the requirements on water resistance cannot be met, the performance of the soaked material is reduced, and the use safety and the service life of the material are affected. Therefore, the development of the wire and cable sheath material for the high-speed railway, which has high mechanical property and good water resistance and can meet the requirements of low smoke, zero halogen and flame retardance, has very important practical significance.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a wire and cable sheath material for a high-speed railway and a preparation method thereof.
The invention provides a wire and cable sheath material for a high-speed railway, which comprises the following raw materials in parts by weight: 20-30 parts of linear low-density polyethylene, 15-20 parts of metallocene polyethylene, 30-40 parts of ethylene-vinyl acetate copolymer, 35-50 parts of magnesium hydroxide, 2-4 parts of white carbon black, 5-8 parts of bisphenol A-bis (diphenyl phosphate), 2-3 parts of pentaerythritol phosphate, 3-4 parts of melamine cyanurate, 2-3 parts of methyl phenyl polysiloxane, 1-2 parts of silane coupling agent, 1-2 parts of di-tert-butyl peroxydicumyl benzene, 0.5-1 part of triallyl isocyanurate, 3-10 parts of plasticizer and 0.5-1 part of antioxidant.
Preferably, the wire and cable sheath material for the high-speed railway comprises the following raw materials in parts by weight: 25 parts of linear low-density polyethylene, 18 parts of metallocene polyethylene, 32 parts of ethylene-vinyl acetate copolymer, 45 parts of magnesium hydroxide, 3 parts of white carbon black, 6 parts of bisphenol A-bis (diphenyl phosphate), 2.5 parts of pentaerythritol phosphate, 3.5 parts of melamine cyanurate, 2.5 parts of methyl phenyl polysiloxane, 1.5 parts of silane coupling agent, 1.5 parts of bis-tert-butylperoxy diisopropylbenzene, 0.6 part of triallyl isocyanurate, 5 parts of plasticizer and 0.8 part of antioxidant.
Preferably, the linear low density polyethylene has a melt index of 3 to 5g/10min at 190 ℃ under 2.16 Kg.
Preferably, the metallocene polyethylene has a melt index of 2-4g/10min at 190 ℃ under 2.16 Kg.
Preferably, the ethylene-vinyl acetate copolymer has a melt index of 5-10g/10min and a vinyl acetate content of 24-28 wt% at 190 ℃ under 2.16 Kg.
Preferably, the magnesium hydroxide is 3000-3500 meshes, and the white carbon black is 1000-1500 meshes.
Preferably, the plasticizer is at least one of dibutyl sebacate, dioctyl sebacate and trioctyl phosphate
Preferably, the antioxidant is antioxidant 168 and antioxidant 1010, and the weight ratio (1-2): 1 are mixed.
The preparation method of the wire and cable sheath material for the high-speed railway comprises the following steps:
s1, adding magnesium hydroxide, white carbon black and a coupling agent into toluene, uniformly stirring, reacting at 70-100 ℃ for 5-10h, and then filtering, washing and drying to obtain a modified filler;
s2, mixing linear low-density polyethylene, metallocene polyethylene and ethylene-vinyl acetate copolymer at high speed for 5-10min to obtain a resin base material;
s3, adding bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, a plasticizer, an antioxidant, a modified filler and a resin base material into an internal mixer, mixing for 5-8min at the temperature of 135-145 ℃, adding bis-tert-butylperoxydiisopropylbenzene, and mixing for 3-5min at the temperature of 95-105 ℃ to obtain the bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, and the like
The invention has the following beneficial effects:
in the raw materials of the invention, the linear low-density polyethylene, the metallocene polyethylene and the ethylene-vinyl acetate copolymer are compounded according to a proper proportion to obtain a resin matrix, which has good strength, chemical stability and extensibility; silane coupling agent modified magnesium hydroxide, bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate and methyl phenyl polysiloxane are compounded to be used as a flame retardant, wherein the bisphenol A-bis (diphenyl phosphate) and the pentaerythritol phosphate can be decomposed to generate a dehydrating agent when being heated, a product obtained after the dehydration of the pentaerythritol phosphate and the methyl phenyl polysiloxane can form carbon under the action of the dehydrating agent, and meanwhile, the melamine cyanurate releases a volatile amine compound when being heated, so that a fluffy and porous foam carbon layer is formed, and the foam carbon layer has excellent heat insulation and oxygen insulation effects and plays a good flame retardant role, so that the requirements on high flame retardant performance can be met on the premise of reducing the using amount of magnesium hydroxide, improving the mechanical properties of materials and reducing the water absorption rate; bisphenol A-bis (diphenyl phosphate) and methyl phenyl polysiloxane also contain a large number of benzene ring groups, so that the mechanical strength, chemical stability and water resistance of the material can be further improved, but negative effects on the toughness of the material exist, and the elongation at break is reduced; the melamine cyanurate has a lamellar structure similar to graphite, is compounded with white carbon black particles, and can play a better toughening effect through the synergistic effect of bridging, so that the toughness of the material is improved. Through compounding the raw materials, the prepared material can meet the requirements of low-smoke halogen-free flame retardance, has high mechanical strength, good toughness and excellent chemical resistance and water resistance, and is suitable for being applied to high-speed railway wire and cable sheath materials.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
In the following examples, a linear low density polyethylene having a melt index of 3.5g/10min at 190 ℃ and 2.16Kg and a metallocene polyethylene having a melt index of 3g/10min at 190 ℃ and 2.16Kg were used. The ethylene-vinyl acetate copolymer has a melt index of 8g/10min at 190 ℃ and 2.16Kg, and the vinyl acetate content is 26 wt%; magnesium hydroxide is 3000 meshes, and white carbon black is 1000 meshes; the antioxidant is antioxidant 168 and antioxidant 1010, and the weight ratio is 2: 1, the plasticizer is dibutyl sebacate, and the silane coupling agent is silane coupling agent A-151.
Example 1
A wire and cable sheath material for a high-speed railway comprises the following raw materials in parts by weight: 20 parts of linear low-density polyethylene, 15 parts of metallocene polyethylene, 30 parts of ethylene-vinyl acetate copolymer, 35 parts of magnesium hydroxide, 2 parts of white carbon black, 5 parts of bisphenol A-bis (diphenyl phosphate), 2 parts of pentaerythritol phosphate, 3 parts of melamine cyanurate, 2 parts of methyl phenyl polysiloxane, 1 part of silane coupling agent, 1 part of di-tert-butyl dicumyl peroxide, 0.5 part of triallyl isocyanurate, 3 parts of plasticizer and 0.5 part of antioxidant.
The preparation method of the wire and cable sheath material for the high-speed railway comprises the following steps:
s1, adding magnesium hydroxide, white carbon black and a coupling agent into toluene, uniformly stirring, reacting at 70 ℃ for 10 hours, and then filtering, washing and drying to obtain a modified filler;
s2, mixing the linear low-density polyethylene, the metallocene polyethylene and the ethylene-vinyl acetate copolymer at a high speed for 5min to obtain a resin base material;
s3, adding bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, a plasticizer, an antioxidant, a modified filler and a resin base material into an internal mixer, mixing for 5min at 135 ℃, adding di-tert-butyl dicumyl peroxide, and mixing for 3in at 95 ℃ to obtain the product.
Example 2
A wire and cable sheath material for a high-speed railway comprises the following raw materials in parts by weight: 30 parts of linear low-density polyethylene, 20 parts of metallocene polyethylene, 40 parts of ethylene-vinyl acetate copolymer, 50 parts of magnesium hydroxide, 4 parts of white carbon black, 8 parts of bisphenol A-bis (diphenyl phosphate), 3 parts of pentaerythritol phosphate, 4 parts of melamine cyanurate, 3 parts of methyl phenyl polysiloxane, 2 parts of a silane coupling agent, 2 parts of di-tert-butyl dicumyl peroxide, 1 part of triallyl isocyanurate, 10 parts of a plasticizer and 1 part of an antioxidant.
The preparation method of the wire and cable sheath material for the high-speed railway comprises the following steps:
s1, adding magnesium hydroxide, white carbon black and a coupling agent into toluene, uniformly stirring, reacting for 5 hours at 100 ℃, and then filtering, washing and drying to obtain a modified filler;
s2, mixing linear low-density polyethylene, metallocene polyethylene and ethylene-vinyl acetate copolymer at high speed for 10min to obtain a resin base material;
s3, adding bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, a plasticizer, an antioxidant, a modified filler and a resin base material into an internal mixer, mixing for 8min at 145 ℃, adding di-tert-butylperoxydiisopropylbenzene, and mixing for 5min at 105 ℃ to obtain the product.
Example 3
A wire and cable sheath material for a high-speed railway comprises the following raw materials in parts by weight: 25 parts of linear low-density polyethylene, 18 parts of metallocene polyethylene, 32 parts of ethylene-vinyl acetate copolymer, 45 parts of magnesium hydroxide, 3 parts of white carbon black, 6 parts of bisphenol A-bis (diphenyl phosphate), 2.5 parts of pentaerythritol phosphate, 3.5 parts of melamine cyanurate, 2.5 parts of methyl phenyl polysiloxane, 1.5 parts of silane coupling agent, 1.5 parts of bis-tert-butylperoxy diisopropylbenzene, 0.6 part of triallyl isocyanurate, 5 parts of plasticizer and 0.8 part of antioxidant.
The preparation method of the wire and cable sheath material for the high-speed railway comprises the following steps:
s1, adding magnesium hydroxide, white carbon black and a coupling agent into toluene, uniformly stirring, reacting at 80 ℃ for 6 hours, and then filtering, washing and drying to obtain a modified filler;
s2, mixing the linear low-density polyethylene, the metallocene polyethylene and the ethylene-vinyl acetate copolymer at a high speed for 8min to obtain a resin base material;
s3, adding bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, a plasticizer, an antioxidant, a modified filler and a resin base material into an internal mixer, mixing for 6min at 140 ℃, adding di-tert-butyl dicumyl peroxide, and mixing for 4min at 100 ℃ to obtain the product.
The materials prepared in examples 1-3 were subjected to performance tests, wherein the tensile strength and elongation at break test methods refer to GB/T1040-92, and the tensile strength change rate and elongation at break change rate were tested under the conditions of 150 ℃ and 10d heat aging; the oxygen index test method refers to GB/T2046-93; the water absorption test method refers to GB/T2951.13-2008. The test results are shown in table 1:
TABLE 1 Performance test results of the materials
| Test index | Example 1 | Example 2 | Example 3 |
| Tensile Strength (MPa) | 14.3 | 13.6 | 14.1 |
| Elongation at Break (%) | 208 | 219 | 224 |
| Tensile Strength Change Rate (%) | 8.8 | 8.2 | 7.8 |
| Elongation at Break Change (%) | 15 | 12 | 13 |
| Oxygen Index (LOI) | 31 | 31 | 32 |
| Water absorption capacity(mg/cm2) | 9.1 | 9.4 | 8.5 |
Wherein the tensile strength change rate and the elongation at break change rate are tested under the conditions of 150 ℃ and 10d of heat aging.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The wire and cable sheath material for the high-speed railway is characterized by comprising the following raw materials in parts by weight: 20-30 parts of linear low-density polyethylene, 15-20 parts of metallocene polyethylene, 30-40 parts of ethylene-vinyl acetate copolymer, 35-50 parts of magnesium hydroxide, 2-4 parts of white carbon black, 5-8 parts of bisphenol A-bis (diphenyl phosphate), 2-3 parts of pentaerythritol phosphate, 3-4 parts of melamine cyanurate, 2-3 parts of methyl phenyl polysiloxane, 1-2 parts of silane coupling agent, 1-2 parts of di-tert-butyl peroxydicumyl benzene, 0.5-1 part of triallyl isocyanurate, 3-10 parts of plasticizer and 0.5-1 part of antioxidant.
2. The electric wire and cable sheath material for the high-speed railway as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 25 parts of linear low-density polyethylene, 18 parts of metallocene polyethylene, 32 parts of ethylene-vinyl acetate copolymer, 45 parts of magnesium hydroxide, 3 parts of white carbon black, 6 parts of bisphenol A-bis (diphenyl phosphate), 2.5 parts of pentaerythritol phosphate, 3.5 parts of melamine cyanurate, 2.5 parts of methyl phenyl polysiloxane, 1.5 parts of silane coupling agent, 1.5 parts of bis-tert-butylperoxy diisopropylbenzene, 0.6 part of triallyl isocyanurate, 5 parts of plasticizer and 0.8 part of antioxidant.
3. The electric wire and cable sheath material for high-speed railway according to claim 1 or 2, wherein the linear low-density polyethylene has a melt index of 3-5g/10min at 190 ℃ and 2.16 Kg.
4. The electric wire and cable sheathing material for high-speed railways according to any one of claims 1 to 3, wherein the metallocene polyethylene has a melt index of 2 to 4g/10min at 190 ℃ under 2.16 Kg.
5. The electric wire and cable sheathing material for high-speed railways according to any one of claims 1 to 4, wherein the ethylene-vinyl acetate copolymer has a melt index of 5 to 10g/10min at 190 ℃ under 2.16Kg and a vinyl acetate content of 24 to 28 wt%.
6. The sheath material for the electric wire and cable for the high-speed railway according to any one of claims 1 to 5, wherein the magnesium hydroxide is 3000-3500 mesh and the white carbon black is 1000-1500 mesh.
7. The electric wire and cable sheathing material for high-speed railways according to any one of claims 1 to 6, wherein the plasticizer is at least one of dibutyl sebacate, dioctyl sebacate, and trioctyl phosphate.
8. A method for preparing the electric wire and cable sheath material for the high-speed railway according to any one of claims 1 to 7, which comprises the following steps:
s1, adding magnesium hydroxide, white carbon black and a coupling agent into toluene, uniformly stirring, reacting at 70-100 ℃ for 5-10h, and then filtering, washing and drying to obtain a modified filler;
s2, mixing linear low-density polyethylene, metallocene polyethylene and ethylene-vinyl acetate copolymer at high speed for 5-10min to obtain a resin base material;
s3, adding bisphenol A-bis (diphenyl phosphate), pentaerythritol phosphate, melamine cyanurate, methyl phenyl polysiloxane, triallyl isocyanurate, a plasticizer, an antioxidant, a modified filler and a resin base material into an internal mixer, mixing for 5-8min at 135-145 ℃, adding bis-tert-butylperoxydiisopropylbenzene, and mixing for 3-5min at 95-105 ℃ to obtain the product.
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| CN202010612381.4A CN111647223A (en) | 2020-06-30 | 2020-06-30 | Wire and cable sheath material for high-speed railway and preparation method thereof |
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| CN202010612381.4A CN111647223A (en) | 2020-06-30 | 2020-06-30 | Wire and cable sheath material for high-speed railway and preparation method thereof |
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| CN111647223A true CN111647223A (en) | 2020-09-11 |
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Application publication date: 20200911 |