CN113462045A - Medium-voltage fire-resistant power cable - Google Patents
Medium-voltage fire-resistant power cable Download PDFInfo
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- CN113462045A CN113462045A CN202110814854.3A CN202110814854A CN113462045A CN 113462045 A CN113462045 A CN 113462045A CN 202110814854 A CN202110814854 A CN 202110814854A CN 113462045 A CN113462045 A CN 113462045A
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- mica powder
- nitrile rubber
- modified
- power cable
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 28
- 239000010445 mica Substances 0.000 claims abstract description 43
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 39
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011347 resin Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000008367 deionised water Substances 0.000 claims abstract description 13
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 8
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 8
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 8
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 8
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 8
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims abstract description 7
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 claims abstract description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229960004025 sodium salicylate Drugs 0.000 claims abstract description 7
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 30
- 238000002425 crystallisation Methods 0.000 claims description 25
- 230000008025 crystallization Effects 0.000 claims description 25
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 20
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 12
- 239000011787 zinc oxide Substances 0.000 claims description 12
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 11
- 238000001354 calcination Methods 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 8
- VBIIFPGSPJYLRR-UHFFFAOYSA-M Stearyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C VBIIFPGSPJYLRR-UHFFFAOYSA-M 0.000 claims description 7
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 239000012265 solid product Substances 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 230000032683 aging Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 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 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- ZRHANBBTXQZFSP-UHFFFAOYSA-M potassium;4-amino-3,5,6-trichloropyridine-2-carboxylate Chemical compound [K+].NC1=C(Cl)C(Cl)=NC(C([O-])=O)=C1Cl ZRHANBBTXQZFSP-UHFFFAOYSA-M 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
-
- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier 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
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention relates to a medium-voltage fire-resistant power cable, which belongs to the technical field of cables and comprises a cable material and a wire, wherein the cable material comprises the following raw materials in parts by weight: 60-80 parts of modified nitrile rubber, 30-40 parts of high-density polyethylene resin, 20-30 parts of low-density polyethylene resin, 10-20 parts of modified mica powder, 1-3 parts of DCP, 2-4 parts of dioctyl phthalate, 1-3 parts of vinyl silane, 0.8-1.2 parts of antioxidant DLTP, 0.5-1.5 parts of sodium salicylate, 0.6-0.8 part of organic tin stabilizer and 80-100 parts of deionized water; the mica powder is added in the formula, so that the compatibility between the mica powder and resin can be improved, the insulating property, the heat aging resistance and the ultraviolet aging resistance of the resin can be greatly improved, and the wear resistance of the material can be improved.
Description
Technical Field
The invention belongs to the technical field of cables, and relates to a medium-voltage fire-resistant power cable.
Background
The continuous development and application of electric energy are that the double-edged sword brings irreplaceable superiority to people on one hand, and on the other hand, people must be constantly vigilant about the occurrence of fire. Safe power utilization has become the common topic of the times, and although the technology and the day are new, the existing cable fireproof cable layer still has certain limitations in the aspects of time, temperature and effect, and meanwhile, the problems of moisture absorption of the fireproof layer, poor cable flexibility and the like exist, so that the power utilization safety is influenced, and the installation and laying difficulty is increased.
The basic structure of the current fire-resistant wire is a mica tape wrapped outside a conductor, and then a cross-linked low-smoke halogen-free polyolefin insulating sheath is extruded. The fire-resistant electric wire of this kind of structure mainly relies on the mica tape layer to play fire-resistant effect, but mica tape self is more fragile, appears easily in the wrapping process and drops, wraps defects such as unevenness, leads to the product unstable, has the potential safety hazard, and mica easily embrittles when receiving fire and drops, if meet vibrations or water spraying then the very easy fire-resistant inefficacy.
Disclosure of Invention
The invention aims to provide a medium-voltage fire-resistant power cable.
The purpose of the invention can be realized by the following technical scheme:
the medium-voltage fire-resistant power cable comprises a cable material and a wire, wherein the cable material comprises the following raw materials in parts by weight:
60-80 parts of modified nitrile rubber, 30-40 parts of high-density polyethylene resin, 20-30 parts of low-density polyethylene resin, 10-20 parts of modified mica powder, 1-3 parts of DCP, 2-4 parts of dioctyl phthalate, 1-3 parts of vinyl silane, 0.8-1.2 parts of antioxidant DLTP, 0.5-1.5 parts of sodium salicylate, 0.6-0.8 part of organic tin stabilizer and 80-100 parts of deionized water;
the modified mica powder is prepared by the following steps:
adding mica powder into distilled water, stirring for 10-20min at 40-50 ℃ to fully disperse the mica powder in an aqueous solution, then adding titanium tetrachloride and octadecyl trimethyl ammonium chloride, moving to a water bath for heating at 80-90 ℃, continuously stirring for 1.2-1.4h, then naturally cooling to room temperature, adding an ammonia water solution, adjusting the pH of the solution to 7.2-7.4, then continuously stirring for 1.2-1.4h to enable the solution to be in a gel state, filtering out the gel material, washing for 2-4 times by using ethyl acetate, then drying, calcining for 5-7 h at 100-120 ℃ after drying, cooling to room temperature, crushing a solid product obtained by calcining, and sieving to obtain modified mica powder.
As a preferred technical scheme of the medium-voltage fire-resistant power cable, the usage ratio of mica powder, titanium tetrachloride and octadecyl trimethyl ammonium chloride is 0.5 g: 50 ml: 75 ml.
As a preferred technical scheme of the medium-voltage fire-resistant power cable, the modified nitrile rubber is prepared by the following steps:
s11, adding zinc oxide and nano-scale aluminum hydroxide into a beaker, then pouring distilled water into the beaker, and slowly stirring for 10-20min at the constant temperature of 55-65 ℃;
s12, adding nitrile rubber into the beaker, and continuing stirring for 20-30min until the materials are fully and uniformly mixed;
s13, dropwise adding ethylenediamine into the beaker, continuing stirring for 1.5h after the ethylenediamine is dropwise added,
s14, pouring the materials in the beaker into a crystallization kettle, putting the crystallization kettle into an oven at 200-250 ℃ for crystallization reaction for 48 hours, taking out the crystallization kettle, cooling to room temperature, carrying out suction filtration on the materials in the crystallization kettle, and drying in the oven at 100 ℃ to obtain the modified nitrile rubber.
As a preferred technical scheme of the medium-voltage fire-resistant power cable, the usage ratio of zinc oxide, nano-aluminum hydroxide, nitrile rubber and hexamethylene diamine is as follows: 3 g: 2.8 g: 5.5 g: 1.5ml
As a preferable technical scheme of the medium-voltage fire-resistant power cable, the preparation method of the cable comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, adding polyvinyl chloride resin, high-density polyethylene resin, low-density polyethylene resin, a cross-linking agent, a stabilizing agent and 60% of deionized water into a mixer, heating to 80-100 ℃, and reacting for 1.2-1.4h to obtain a premix;
thirdly, adding modified mica powder, modified nitrile rubber, a plasticizer, a silane coupling agent, an antioxidant, a cosolvent and 40% of deionized water into the premix, and mixing at the temperature of 120-140 ℃ to obtain a mixture;
fourthly, extruding and granulating the mixture by using a parallel double-screw extruder to obtain a cable material;
and fifthly, coating the cable material on the surface of the wire, cooling, solidifying and cutting to obtain the medium-voltage fire-resistant power cable.
The invention has the beneficial effects that:
(1) the mica powder is added into the formula and dispersed in the polyethylene resin in a stripped state, so that the agglomeration of the mica powder in a polyethylene matrix can be effectively reduced, the dispersibility of the mica powder in the polyethylene is enhanced, the thermal stability and the waterproof performance of the material can be improved, the flame retardant and gas barrier functions are endowed, the compatibility between the mica powder and the resin can be improved, the insulating performance, the heat aging resistance, the ultraviolet aging resistance and the wear resistance of the material can be greatly improved.
(2) In the modified nitrile rubber added in the formula, the zinc oxide and the nano-scale aluminum hydroxide which are fully mixed are mixed with the nitrile rubber because the zinc oxide and the nano-scale aluminum hydroxide have irregular pore channel structures inside, so that the plasticity of the nitrile rubber can be changed, and the Mooney viscosity of the nitrile rubber is reduced. After the ethylenediamine is added, the pore structure in the modified nitrile rubber is uniform, and the air permeability of the surface layer of the material is better.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be given with reference to the preferred embodiments.
Example 1
The modified mica powder is prepared by the following steps:
adding mica powder into distilled water, stirring for 10min at 40 ℃ to fully disperse the mica powder in an aqueous solution, then adding titanium tetrachloride and octadecyl trimethyl ammonium chloride, moving to a water bath for heating to 80 ℃, continuing to stir for 1.2h, then naturally cooling to room temperature, adding an ammonia water solution, adjusting the pH of the solution to 7.2, continuing to stir for 1.2h to enable the solution to be in a gel state, filtering out the gel-like material, then washing for 2 times by using ethyl acetate, then drying, calcining for 5 hours at 100 ℃, cooling to room temperature, crushing a solid product obtained by calcining, and sieving to obtain the modified mica powder.
Example 2
The modified mica powder is prepared by the following steps:
adding mica powder into distilled water, stirring for 15min at 45 ℃ to fully disperse the mica powder in an aqueous solution, then adding titanium tetrachloride and octadecyl trimethyl ammonium chloride, moving to a water bath for heating to 85 ℃, continuing to stir for 1.3h, then naturally cooling to room temperature, adding an ammonia water solution, adjusting the pH of the solution to 7.3, continuing to stir for 1.3h to enable the solution to be in a gel state, filtering out the gel-like material, then washing for 3 times by using ethyl acetate, then drying, calcining for 6 hours at 110 ℃, cooling to room temperature, crushing a solid product obtained by calcining, and sieving to obtain the modified mica powder.
Example 3
The modified mica powder is prepared by the following steps:
adding mica powder into distilled water, stirring for 20min at 50 ℃ to fully disperse the mica powder in an aqueous solution, then adding titanium tetrachloride and octadecyl trimethyl ammonium chloride, moving to a water bath for heating to 90 ℃, continuing to stir for 1.4h, then naturally cooling to room temperature, adding an ammonia water solution, adjusting the pH of the solution to 7.4, continuing to stir for 1.4h to enable the solution to be in a gel state, filtering out the gel-like material, then washing for 4 times by using ethyl acetate, then drying, calcining for 7 hours at 120 ℃, cooling to room temperature, crushing a solid product obtained by calcining, and sieving to obtain the modified mica powder.
Example 4
The modified nitrile rubber is prepared by the following steps:
s11, adding zinc oxide and nano-scale aluminum hydroxide into a beaker, then pouring distilled water into the beaker, and slowly stirring for 10min at the constant temperature of 55 ℃;
s12, adding nitrile rubber into the beaker, and continuing stirring for 20min until the materials are fully and uniformly mixed;
s13, dropwise adding ethylenediamine into the beaker, continuing stirring for 1.5h after the ethylenediamine is dropwise added,
s14, pouring the materials in the beaker into a crystallization kettle, putting the crystallization kettle into a 200 ℃ oven for crystallization reaction for 48 hours, taking out the crystallization kettle, cooling to room temperature, carrying out suction filtration on the materials in the crystallization kettle, and drying in the 100 ℃ oven to obtain the modified nitrile rubber.
Wherein, the dosage ratio of zinc oxide, nano-aluminum hydroxide, nitrile rubber and hexamethylene diamine is as follows: 3 g: 2.8 g: 5.5 g: 1.5 ml.
Example 5
The modified nitrile rubber is prepared by the following steps:
s11, adding zinc oxide and nano-scale aluminum hydroxide into a beaker, then pouring distilled water into the beaker, and slowly stirring for 15min at the constant temperature of 60 ℃;
s12, adding nitrile rubber into the beaker, and continuing stirring for 25min until the materials are fully and uniformly mixed;
s13, dropwise adding ethylenediamine into the beaker, continuing stirring for 1.5h after the ethylenediamine is dropwise added,
s14, pouring the materials in the beaker into a crystallization kettle, putting the crystallization kettle into a 225 ℃ oven for crystallization reaction for 48 hours, taking out the crystallization kettle, cooling to room temperature, carrying out suction filtration on the materials in the crystallization kettle, and drying in the 100 ℃ oven to obtain the modified nitrile rubber.
Wherein, the dosage ratio of zinc oxide, nano-aluminum hydroxide, nitrile rubber and hexamethylene diamine is as follows: 3 g: 2.8 g: 5.5 g: 1.5 ml.
Example 6
The modified nitrile rubber is prepared by the following steps:
s11, adding zinc oxide and nano-scale aluminum hydroxide into a beaker, then pouring distilled water into the beaker, and slowly stirring for 20min at the constant temperature of 65 ℃;
s12, adding nitrile rubber into the beaker, and continuing stirring for 30min until the materials are fully and uniformly mixed;
s13, dropwise adding ethylenediamine into the beaker, continuing stirring for 1.5h after the ethylenediamine is dropwise added,
s14, pouring the materials in the beaker into a crystallization kettle, putting the crystallization kettle into a 250 ℃ oven for crystallization reaction for 48 hours, taking out the crystallization kettle, cooling to room temperature, carrying out suction filtration on the materials in the crystallization kettle, and drying in the 100 ℃ oven to obtain the modified nitrile rubber.
Wherein, the dosage ratio of zinc oxide, nano-aluminum hydroxide, nitrile rubber and hexamethylene diamine is as follows: 3 g: 2.8 g: 5.5 g: 1.5 ml.
Example 7
The preparation method of the medium-voltage fire-resistant power cable comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, adding polyvinyl chloride resin, high-density polyethylene resin, low-density polyethylene resin, DCP, organic tin stabilizer and 60% of deionized water into a mixer, heating to 80 ℃, and reacting for 1.2 hours to obtain a premix;
thirdly, adding modified mica powder, modified nitrile rubber, dioctyl phthalate, vinyl silane, antioxidant DLTP, sodium salicylate and 40% of deionized water into the premix, and mixing at 120 ℃ to obtain a mixture;
fourthly, extruding and granulating the mixture by using a parallel double-screw extruder to obtain a cable material;
and fifthly, coating the cable material on the surface of the wire, cooling, solidifying and cutting to obtain the medium-voltage fire-resistant power cable.
Example 8
The preparation method of the medium-voltage fire-resistant power cable comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, adding polyvinyl chloride resin, high-density polyethylene resin, low-density polyethylene resin, DCP, organic tin stabilizer and 60% of deionized water into a mixer, heating to 90 ℃, and reacting for 1.3 hours to obtain a premix;
thirdly, adding modified mica powder, modified nitrile rubber, dioctyl phthalate, vinyl silane, antioxidant DLTP, sodium salicylate and 40% of deionized water into the premix, and mixing at the temperature of 130 ℃ to obtain a mixture;
fourthly, extruding and granulating the mixture by using a parallel double-screw extruder to obtain a cable material;
and fifthly, coating the cable material on the surface of the wire, cooling, solidifying and cutting to obtain the medium-voltage fire-resistant power cable.
Example 9
The preparation method of the medium-voltage fire-resistant power cable comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, adding polyvinyl chloride resin, high-density polyethylene resin, low-density polyethylene resin, DCP, organic tin stabilizer and 60% of deionized water into a mixer, heating to 100 ℃, and reacting for 1.4 hours to obtain a premix;
thirdly, adding modified mica powder, modified nitrile rubber, dioctyl phthalate, vinyl silane, antioxidant DLTP, sodium salicylate and 40% of deionized water into the premix, and mixing at the temperature of 140 ℃ to obtain a mixture;
fourthly, extruding and granulating the mixture by using a parallel double-screw extruder to obtain a cable material;
and fifthly, coating the cable material on the surface of the wire, cooling, solidifying and cutting to obtain the medium-voltage fire-resistant power cable.
Comparative example 1
The modified mica powder in example 9 was replaced with mica powder, and the remaining raw materials and preparation process remained unchanged.
The samples obtained in examples 7 to 9 and comparative example 1 were subjected to a tensile test in accordance with GB/T1040 to determine the tensile strength; testing the impact strength according to GB/T1043; testing the oxygen index according to GB/T10707; the test for vertical burning was carried out according to UL94-V0 (specimen thickness 4 mm);
the test results are shown in table 1 below:
TABLE 1
The table shows that the medium-voltage fire-resistant power cable prepared by the invention has excellent mechanical properties and fire resistance by adding the modified mica powder and the modified nitrile rubber.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The medium-voltage fire-resistant power cable comprises a cable material and a wire, and is characterized in that the cable material comprises the following raw materials in parts by weight:
60-80 parts of modified nitrile rubber, 30-40 parts of high-density polyethylene resin, 20-30 parts of low-density polyethylene resin, 10-20 parts of modified mica powder, 1-3 parts of DCP, 2-4 parts of dioctyl phthalate, 1-3 parts of vinyl silane, 0.8-1.2 parts of antioxidant DLTP, 0.5-1.5 parts of sodium salicylate, 0.6-0.8 part of organic tin stabilizer and 80-100 parts of deionized water;
the modified mica powder is prepared by the following steps:
adding mica powder into distilled water, stirring for 10-20min at 40-50 ℃ to fully disperse the mica powder in an aqueous solution, then adding titanium tetrachloride and octadecyl trimethyl ammonium chloride, moving to a water bath for heating at 80-90 ℃, continuously stirring for 1.2-1.4h, then naturally cooling to room temperature, adding an ammonia water solution, adjusting the pH of the solution to 7.2-7.4, then continuously stirring for 1.2-1.4h to enable the solution to be in a gel state, filtering out the gel material, washing for 2-4 times by using ethyl acetate, then drying, calcining for 5-7 h at 100-120 ℃ after drying, cooling to room temperature, crushing a solid product obtained by calcining, and sieving to obtain modified mica powder.
2. A medium voltage fire resistant power cable according to claim 1, characterized in that: the dosage ratio of the mica powder, the titanium tetrachloride and the octadecyl trimethyl ammonium chloride is 0.5 g: 50 ml: 75 ml.
3. A medium voltage fire resistant power cable according to claim 1, characterized in that: the modified nitrile rubber is prepared by the following steps:
s11, adding zinc oxide and nano-scale aluminum hydroxide into a beaker, then pouring distilled water into the beaker, and slowly stirring for 10-20min at the constant temperature of 55-65 ℃;
s12, adding nitrile rubber into the beaker, and continuing stirring for 20-30min until the materials are fully and uniformly mixed;
s13, dropwise adding ethylenediamine into the beaker, continuing stirring for 1.5h after the ethylenediamine is dropwise added,
s14, pouring the materials in the beaker into a crystallization kettle, putting the crystallization kettle into an oven at 200-250 ℃ for crystallization reaction for 48 hours, taking out the crystallization kettle, cooling to room temperature, carrying out suction filtration on the materials in the crystallization kettle, and drying in the oven at 100 ℃ to obtain the modified nitrile rubber.
4. A medium voltage fire resistant power cable according to claim 3, characterized in that: the dosage ratio of zinc oxide, nano-scale aluminum hydroxide, nitrile rubber and hexamethylene diamine is as follows: 3 g: 2.8 g: 5.5 g: 1.5 ml.
5. A medium voltage fire resistant power cable according to claim 1, characterized in that: the preparation method of the cable comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, adding polyvinyl chloride resin, high-density polyethylene resin, low-density polyethylene resin, DCP, organic tin stabilizer and 60% of deionized water into a mixer, heating to 80-100 ℃, and reacting for 1.2-1.4h to obtain a premix;
thirdly, adding modified mica powder, modified nitrile rubber, dioctyl phthalate, vinyl silane, antioxidant DLTP, sodium salicylate and 40% of deionized water into the premix, and mixing at the temperature of 120-140 ℃ to obtain a mixture;
fourthly, extruding and granulating the mixture by using a parallel double-screw extruder to obtain a cable material;
and fifthly, coating the cable material on the surface of the wire, cooling, solidifying and cutting to obtain the medium-voltage fire-resistant power cable.
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| WO1999011704A1 (en) * | 1997-08-29 | 1999-03-11 | Nippon Zeon Co., Ltd. | Rubber composition, electric wire coating material, and electric wire |
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| JP2008021456A (en) * | 2006-07-11 | 2008-01-31 | Hitachi Cable Ltd | High voltage cabtire cable |
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