CN109608787B - Sheath material for underground communication cable and preparation method thereof - Google Patents
Sheath material for underground communication cable and preparation method thereof Download PDFInfo
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- CN109608787B CN109608787B CN201811540352.0A CN201811540352A CN109608787B CN 109608787 B CN109608787 B CN 109608787B CN 201811540352 A CN201811540352 A CN 201811540352A CN 109608787 B CN109608787 B CN 109608787B
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- 239000000463 material Substances 0.000 title claims abstract description 94
- 238000004891 communication Methods 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 109
- 239000003973 paint Substances 0.000 claims abstract description 68
- 230000007797 corrosion Effects 0.000 claims abstract description 50
- 238000005260 corrosion Methods 0.000 claims abstract description 50
- 239000002253 acid Substances 0.000 claims abstract description 38
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 37
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 37
- 239000010426 asphalt Substances 0.000 claims abstract description 34
- 239000003513 alkali Substances 0.000 claims abstract description 27
- -1 fatty acid octyl ester Chemical class 0.000 claims abstract description 27
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 18
- 239000004917 carbon fiber Substances 0.000 claims abstract description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000005977 Ethylene Substances 0.000 claims abstract description 17
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 17
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 17
- 239000003822 epoxy resin Substances 0.000 claims abstract description 17
- 229930195729 fatty acid Natural products 0.000 claims abstract description 17
- 239000000194 fatty acid Substances 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003208 petroleum Substances 0.000 claims abstract description 17
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 229920002635 polyurethane Polymers 0.000 claims abstract description 17
- 239000004814 polyurethane Substances 0.000 claims abstract description 17
- 235000012424 soybean oil Nutrition 0.000 claims abstract description 17
- 239000003549 soybean oil Substances 0.000 claims abstract description 17
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002585 base Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 230000002708 enhancing effect Effects 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 25
- ARCGXLSVLAOJQL-UHFFFAOYSA-N anhydrous trimellitic acid Natural products OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 claims description 10
- 238000007334 copolymerization reaction Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 125000005591 trimellitate group Chemical group 0.000 claims description 5
- 239000013638 trimer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 239000004593 Epoxy Substances 0.000 abstract 1
- ZOUSKILWBXOGIA-UHFFFAOYSA-N triphenyl benzene-1,2,4-tricarboxylate Chemical compound C=1C=C(C(=O)OC=2C=CC=CC=2)C(C(=O)OC=2C=CC=CC=2)=CC=1C(=O)OC1=CC=CC=C1 ZOUSKILWBXOGIA-UHFFFAOYSA-N 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000002386 leaching Methods 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000036561 sun exposure Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- H01B3/443—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 vinylhalogenides or other halogenoethylenic compounds
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- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
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Abstract
The invention relates to the technical field of cable sheaths, and discloses a sheath material for an underground communication cable, which comprises the following raw materials in parts by weight: 40-80 parts of polyvinyl chloride, 10-20 parts of carbon fiber, 23-43 parts of moisture-proof filler, 16-31 parts of acid-base corrosion resistant filler and 17-29 parts of flexibility enhancing filler; the moisture-proof filler is composed of petroleum asphalt, natural asphalt and butyl rubber, the acid and alkali corrosion resistant filler is composed of epoxy-phenolic paint, polyurethane paint, epoxy resin paint and trimeric ethylene anticorrosive paint, and the flexibility-increasing filler is composed of epoxidized soybean oil, epoxy fatty acid octyl ester, tricresyl phosphate, triphenyl phosphate and trimellitate. The invention also discloses a preparation method of the sheath material for the underground communication cable. The invention realizes the technical effect of obviously improving the flexibility and the corrosion resistance of the sheath material, and solves the technical problem that the flexibility and the corrosion resistance of the sheath material in the prior art cannot be improved simultaneously.
Description
Technical Field
The invention relates to the technical field of cable sheaths, in particular to a sheath material for an underground communication cable and a preparation method thereof.
Background
The communication cable is a communication line formed by a cable core formed by twisting a plurality of mutually insulated wires or conductors and an outer sheath for protecting the cable core from being affected by damp and mechanical damage, and has various laying modes such as overhead, direct burial, pipeline, water bottom and the like; the underground communication cable is a cable laid underground and comprises a pipeline communication cable and a buried communication cable.
Because the underground communication cable directly contacts with water, acidic substances and alkaline substances, in the long-term use process, underground moisture, acidic substances and alkaline substances can continuously corrode a sheath of the underground communication cable, and if the moisture resistance and the acid and alkali corrosion resistance of the sheath of the underground communication cable are not good enough, the underground moisture, acidic substances and alkaline substances can continuously corrode a cable core of the underground communication cable through the sheath, and finally the underground communication cable can lose the communication transmission function.
If the sheath material coated on the underground communication cable has better moisture resistance and acid and alkali corrosion resistance, the sheath of the underground communication cable can more effectively protect the underground communication cable core to ensure that the underground communication cable core can safely and efficiently complete the communication transmission function, and meanwhile, the service life of the underground communication cable core can also be effectively prolonged.
The invention patent application with the application publication number of CN108410079A discloses a communication cable sheath material and a preparation method thereof, the preparation of the invention patent application is convenient, and the prepared communication cable sheath material has the advantages of good stretchability, low cost, small density and high softness. However, the patent application of the invention does not provide a solution for effectively improving the moisture resistance and the acid and alkali corrosion resistance of the cable sheath material.
The invention patent application with the application publication number of CN105694456A discloses a corrosion-resistant cable sheath material and a preparation method thereof, and the cable sheath material provided by the invention patent application has good mechanical strength and corrosion resistance, good solvent resistance, excellent water resistance, heat resistance and ageing resistance, can be used outdoors, underwater or in other environments contacting with corrosive substances for a long time, and has wide application prospect. However, in the patent application, the FA-type polysulfide rubber and aramid A are used as raw materials to prepare the cable sheath material, although the prepared cable sheath has high mechanical strength, the flexibility is low, and the cable sheath material with low flexibility can seriously increase the difficulty of laying communication cables.
The invention provides a sheath material for an underground communication cable and a preparation method thereof, and aims to solve the technical problem that the flexibility and the corrosion resistance of the sheath material for the underground communication cable in the prior art cannot be improved at the same time.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a sheath material for an underground communication cable and a preparation method thereof, and solves the technical problem that the flexibility and the corrosion resistance cannot be simultaneously improved by the sheath material in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
the sheath material for the underground communication cable comprises the following raw materials in parts by weight: 40-80 parts of polyvinyl chloride, 10-20 parts of carbon fiber, 23-43 parts of moisture-proof filler, 16-31 parts of acid-base corrosion resistant filler and 17-29 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 10 to 20 mass parts of petroleum asphalt, 5 to 8 mass parts of natural asphalt and 8 to 15 mass parts of butyl rubber;
the acid and alkali corrosion resistant filler consists of 5-8 parts by mass of epoxy-phenolic paint, 3-5 parts by mass of polyurethane paint, 5-10 parts by mass of epoxy resin paint and 3-8 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler consists of 2-5 parts by mass of epoxidized soybean oil, 3-5 parts by mass of epoxidized fatty acid octyl ester, 4-7 parts by mass of tricresyl phosphate, 3-5 parts by mass of triphenyl phosphate and 5-7 parts by mass of trimellitic ester.
Preferably, the sheath material comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 10 parts of carbon fiber, 23 parts of moisture-proof filler, 16 parts of acid-base corrosion resistant filler and 17 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 10 parts by mass of petroleum asphalt, 5 parts by mass of natural asphalt and 8 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 5 parts by mass of epoxy-phenolic paint, 3 parts by mass of polyurethane paint, 5 parts by mass of epoxy resin paint and 3 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 2 parts by mass of epoxidized soybean oil, 3 parts by mass of epoxidized fatty acid octyl ester, 4 parts by mass of tricresyl phosphate, 3 parts by mass of triphenyl phosphate and 5 parts by mass of trimellitic acid ester.
Preferably, the sheath material comprises the following raw materials in parts by weight: 50 parts of polyvinyl chloride, 15 parts of carbon fiber, 33 parts of moisture-proof filler, 23 parts of acid-base corrosion resistant filler and 24 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 15 parts by mass of petroleum asphalt, 6 parts by mass of natural asphalt and 12 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 6 parts by mass of epoxy-phenolic paint, 4 parts by mass of polyurethane paint, 8 parts by mass of epoxy resin paint and 5 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 3 parts by mass of epoxidized soybean oil, 4 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 4 parts by mass of triphenyl phosphate and 6 parts by mass of trimellitic acid ester.
Preferably, the sheath material comprises the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 20 parts of carbon fiber, 43 parts of moisture-proof filler, 31 parts of acid-base corrosion resistant filler and 29 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 20 parts by mass of petroleum asphalt, 8 parts by mass of natural asphalt and 15 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 8 parts by mass of epoxy-phenolic paint, 5 parts by mass of polyurethane paint, 10 parts by mass of epoxy resin paint and 8 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 5 parts by mass of epoxidized soybean oil, 5 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 5 parts by mass of triphenyl phosphate and 7 parts by mass of trimellitic acid ester.
A preparation method of a sheath material for underground communication cables comprises the following steps:
s1. preparation of moisture-proof filler
Adding 10-20 parts by mass of petroleum asphalt, 5-8 parts by mass of natural asphalt and 8-15 parts by mass of butyl rubber into a high-speed mixer, and carrying out mixing copolymerization for 20-60min at the temperature of 160-;
s2, preparation of acid and alkali corrosion resistant filler
Adding 5-8 parts by mass of epoxy-phenolic paint, 3-5 parts by mass of polyurethane paint, 5-10 parts by mass of epoxy resin paint and 3-8 parts by mass of ethylene trimer anticorrosive paint into a high-speed mixer, and mixing and copolymerizing for 30-50min at the temperature of 90-120 ℃ and the rotating speed of 450-600r/min to prepare the acid and alkali corrosion resistant filler;
s3, preparation of flexibility-enhanced filler
Adding 2-5 parts by mass of epoxidized soybean oil, 3-5 parts by mass of epoxidized fatty acid octyl ester, 4-9 parts by mass of tricresyl phosphate, 3-8 parts by mass of triphenyl phosphate and 5-10 parts by mass of trimellitate into a high-speed mixer, and carrying out mixed copolymerization for 40-90min at the temperature of 50-80 ℃ and the rotation speed of 350-500r/min to prepare the flexibility-increasing filler;
s4, preparation of modified polyvinyl chloride copolymer
Adding the moisture-proof filler prepared in the step S1, the acid and alkali corrosion resistant filler prepared in the step S2, and the flexibility increasing filler prepared in the step S3, 40-80 parts by mass of polyvinyl chloride and 10-20 parts by mass of carbon fiber into an internal mixer, and mixing and internally mixing for 30-60min at the temperature of 60-90 ℃ and the pressure of 0.3-0.5MPa to prepare a modified polyvinyl chloride copolymer;
s5, preparation of sheath material for underground communication cable
And (4) adding the modified polyvinyl chloride copolymer prepared in the step S4 into a conical twin-screw extruder, and extruding and granulating at the temperature of 175 ℃ and 185 ℃ to prepare the sheath material for the underground communication cable.
Preferably, in the step S1, the mixture is copolymerized for 40min at a temperature of 180 ℃ and a rotation speed of 750 r/min.
Preferably, in the step S2, the mixture is copolymerized for 40min at a temperature of 105 ℃ and a rotation speed of 500 r/min.
Preferably, in step S3, the mixture is copolymerized for 80min at a temperature of 60 ℃ and a rotation speed of 450 r/min.
Preferably, in step S4, the mixture is banburied for 50min at 80 ℃ and 0.5 MPa.
(III) advantageous technical effects
Compared with the prior art, the invention has the following beneficial technical effects:
1. the tensile strength of the sheath material for the underground communication cable is 29.9-34.7MPa through tests, and compared with the tensile strength of 18-23MPa of the sheath material in the prior art, the technical effect of obviously improving the tensile strength performance of the sheath material is achieved;
the breaking tensile strain is 425-452%, and compared with the breaking tensile strain 294-380% of the sheath material in the prior art, the technical effect of remarkably improving the breaking tensile strain performance of the sheath material is achieved;
the volume resistivity at 20 deg.C is (2.2-3.5) × 1010Omega · m, volume resistivity at 20 ℃ (2.1-3.1) × 10 compared with that of the prior art jacket material8Compared with omega m, the technical effect of remarkably improving the volume resistivity performance of the sheath material is achieved;
after the sheath material for the underground communication cable is processed and molded, the sheath material is firstly immersed in an acid solution and then immersed in an alkaline solution, and no crack exists on the surface of the sheath;
compared with the cable sheath material in the prior art, the cable sheath material is only immersed in an acid solution and has a small amount of fine lines about 1mm on the surface, so that the technical effect of remarkably improving the acid and alkali corrosion resistance of the sheath material is achieved;
according to the technical scheme, on the basis of obviously improving the tensile strength performance and the volume resistivity performance of the sheath material, the technical effects of obviously improving the fracture tensile strain performance and the acid-base corrosion resistance of the sheath material are achieved, so that the technical effects of obviously improving the flexibility and the corrosion resistance of the sheath material are achieved.
2. According to the preparation method of the sheath material for the underground communication cable, the moistureproof filler, the acid and alkali corrosion resistant filler and the flexibility increasing filler are respectively prepared, and then are mixed and banburied with the polyvinyl chloride and the carbon fibers to prepare the sheath material for the underground communication cable.
Detailed Description
The first embodiment is as follows:
the sheath material for the underground communication cable comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 10 parts of carbon fiber, 23 parts of moisture-proof filler, 16 parts of acid-base corrosion resistant filler and 17 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 10 parts by mass of petroleum asphalt, 5 parts by mass of natural asphalt and 8 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 5 parts by mass of epoxy-phenolic paint, 3 parts by mass of polyurethane paint, 5 parts by mass of epoxy resin paint and 3 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 2 parts by mass of epoxidized soybean oil, 3 parts by mass of epoxidized fatty acid octyl ester, 4 parts by mass of tricresyl phosphate, 3 parts by mass of triphenyl phosphate and 5 parts by mass of trimellitic acid ester.
The preparation method of the sheath material for the underground communication cable comprises the following steps:
s1, adding 10 parts by mass of petroleum asphalt, 5 parts by mass of natural asphalt and 8 parts by mass of butyl rubber into a high-speed mixer, and carrying out mixing copolymerization for 20min at the temperature of 160 ℃ and the rotating speed of 600r/min to prepare the moistureproof filler;
s2, adding 5 parts by mass of epoxy-phenolic aldehyde paint, 3 parts by mass of polyurethane paint, 5 parts by mass of epoxy resin paint and 3 parts by mass of trimeric ethylene anticorrosive paint into a high-speed mixer, and mixing and copolymerizing for 30min at the temperature of 90 ℃ and the rotating speed of 450r/min to prepare the acid-base corrosion resistant filler;
s3, adding 2 parts by mass of epoxidized soybean oil, 3 parts by mass of epoxidized fatty acid octyl ester, 4 parts by mass of tricresyl phosphate, 3 parts by mass of triphenyl phosphate and 5 parts by mass of trimellitate into a high-speed mixer, and mixing and copolymerizing for 40min at the temperature of 50 ℃ and the rotating speed of 350r/min to prepare the flexibility-enhanced filler;
s4, adding the moisture-proof filler prepared in the step S1, the acid and alkali corrosion resistant filler prepared in the step S2, and the flexibility increasing filler prepared in the step S3, 40 parts by mass of polyvinyl chloride and 10 parts by mass of carbon fiber into an internal mixer, and mixing and internally mixing for 30min at the temperature of 60 ℃ and the pressure of 0.3MPa to prepare a modified polyvinyl chloride copolymer;
s5, adding the modified polyvinyl chloride copolymer prepared in the step S4 into a conical double-screw extruder, and extruding and granulating at the temperature of 175 ℃ to prepare the sheath material for the underground communication cable.
Example two:
the sheath material for the underground communication cable comprises the following raw materials in parts by weight: 50 parts of polyvinyl chloride, 15 parts of carbon fiber, 33 parts of moisture-proof filler, 23 parts of acid-base corrosion resistant filler and 24 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 15 parts by mass of petroleum asphalt, 6 parts by mass of natural asphalt and 12 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 6 parts by mass of epoxy-phenolic paint, 4 parts by mass of polyurethane paint, 8 parts by mass of epoxy resin paint and 5 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 3 parts by mass of epoxidized soybean oil, 4 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 4 parts by mass of triphenyl phosphate and 6 parts by mass of trimellitic acid ester.
The preparation method of the sheath material for the underground communication cable comprises the following steps:
s1, adding 15 parts by mass of petroleum asphalt, 6 parts by mass of natural asphalt and 12 parts by mass of butyl rubber into a high-speed mixer, and carrying out mixing copolymerization for 40min at the temperature of 180 ℃ and the rotating speed of 750r/min to prepare the moistureproof filler;
s2, adding 6 parts by mass of epoxy-phenolic aldehyde paint, 4 parts by mass of polyurethane paint, 8 parts by mass of epoxy resin paint and 5 parts by mass of trimeric ethylene anticorrosive paint into a high-speed mixer, and mixing and copolymerizing for 40min at the temperature of 105 ℃ and the rotating speed of 500r/min to prepare the acid-base corrosion resistant filler;
s3, adding 3 parts by mass of epoxidized soybean oil, 4 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 4 parts by mass of triphenyl phosphate and 6 parts by mass of trimellitate into a high-speed mixer, and carrying out mixing copolymerization for 80min at the temperature of 60 ℃ and the rotating speed of 450r/min to prepare the flexibility-enhanced filler;
s4, adding the moisture-proof filler prepared in the step S1, the acid and alkali corrosion resistant filler prepared in the step S2, and the flexibility increasing filler prepared in the step S3, 50 parts by mass of polyvinyl chloride and 15 parts by mass of carbon fiber into an internal mixer, and mixing and internally mixing for 50min at the temperature of 80 ℃ and the pressure of 0.5MPa to prepare a modified polyvinyl chloride copolymer;
s5, adding the modified polyvinyl chloride copolymer prepared in the step S4 into a conical double-screw extruder, and extruding and granulating at the temperature of 180 ℃ to prepare the sheath material for the underground communication cable.
Example three:
the sheath material for the underground communication cable comprises the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 20 parts of carbon fiber, 43 parts of moisture-proof filler, 31 parts of acid-base corrosion resistant filler and 28 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 20 parts by mass of petroleum asphalt, 8 parts by mass of natural asphalt and 15 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 8 parts by mass of epoxy-phenolic paint, 5 parts by mass of polyurethane paint, 10 parts by mass of epoxy resin paint and 8 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 5 parts by mass of epoxidized soybean oil, 5 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 5 parts by mass of triphenyl phosphate and 7 parts by mass of trimellitic acid ester.
The preparation method of the sheath material for the underground communication cable comprises the following steps:
s1, adding 20 parts by mass of petroleum asphalt, 8 parts by mass of natural asphalt and 15 parts by mass of butyl rubber into a high-speed mixer, and carrying out mixing copolymerization for 60min at the temperature of 200 ℃ and the rotating speed of 800r/min to prepare the moistureproof filler;
s2, adding 8 parts by mass of epoxy-phenolic aldehyde paint, 5 parts by mass of polyurethane paint, 10 parts by mass of epoxy resin paint and 8 parts by mass of trimeric ethylene anticorrosive paint into a high-speed mixer, and mixing and copolymerizing for 50min at the temperature of 120 ℃ and the rotating speed of 600r/min to prepare the acid-base corrosion resistant filler;
s3, adding 5 parts by mass of epoxidized soybean oil, 5 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 5 parts by mass of triphenyl phosphate and 7 parts by mass of trimellitate into a high-speed mixer, and mixing and copolymerizing for 90min at the temperature of 80 ℃ and the rotating speed of 500r/min to prepare the flexibility-enhanced filler;
s4, adding the moisture-proof filler prepared in the step S1, the acid and alkali corrosion resistant filler prepared in the step S2, and the flexibility increasing filler prepared in the step S3, 80 parts by mass of polyvinyl chloride and 20 parts by mass of carbon fiber into an internal mixer, and mixing and internally mixing for 60min at the temperature of 90 ℃ and the pressure of 0.5MPa to prepare a modified polyvinyl chloride copolymer;
s5, adding the modified polyvinyl chloride copolymer prepared in the step S4 into a conical double-screw extruder, and extruding and granulating at 185 ℃ to prepare the sheath material for the underground communication cable.
Experimental example:
the mechanical and physical properties and electrical properties of the sheathing material for underground communication cables prepared in the above examples were tested according to the test methods specified in GB/T8815-2008 "flexible polyvinyl chloride plastic for electric wire and cable", and the test results are shown in table 1;
secondly, processing and molding the sheath material for the underground communication cable prepared in the embodiment, soaking the sheath material in an acid solution with the pH value of 1 for 3 hours, then exposing the sheath material to the sun for 5 hours at normal temperature, repeating acid leaching and exposing the sheath material to the sun for 20 times, and observing whether the surface of the sheath has cracks; and then placing the acid-dipped sheath material in an alkaline solution with the pH value of 14 for soaking for 3h, then placing the sheath material in the normal temperature for insolating for 5h, repeating the alkaline dipping and the insolating for 20 times, and observing whether the surface of the sheath has cracks or not, wherein the test results are shown in table 2.
TABLE 1
TABLE 2
| Examples | Whether or not there is a crack in acid leaching | Whether there is crack in alkaline leaching |
| Example one | Is free of | Is free of |
| Example two | Is free of | Is free of |
| EXAMPLE III | Is free of | Is free of |
And (4) judging the standard: the common type of the polyvinyl chloride sheathing material commonly used for the digital communication cable is H-70; the mechanical and physical properties and electrical properties of H-70 are specified in GB/T8815-2008 soft polyvinyl chloride plastics for electric wires and cables, see Table 3;
the mechanical and physical properties and electrical properties of the prior art jacket material are shown in table 4;
after processing and forming a cable sheath material in the prior art, soaking the cable sheath material in an acid solution with pH of 4 for 1h, then exposing the cable sheath material to the sun for 2h at normal temperature, repeating acid leaching and exposing the cable sheath material to the sun for 15 times, and observing that a small amount of fine lines with the thickness of about 1mm exist on the surface of the sheath.
TABLE 3
| Item | H-70 |
| Tensile strength/MPa | ≥15.0 |
| Tensile strain at break/%) | ≥180 |
| Volume resistivity/omega. m at 20 DEG C | ≥1.0×108 |
TABLE 4
The invention has the beneficial effects that:
firstly, the tensile strength of the sheath material for the underground communication cable prepared in the embodiment is 29.9-34.7 MPa;
compared with the tensile strength of more than or equal to 15.0MPa of H-70 specified in GB/T8815-2008 soft polyvinyl chloride plastic for electric wires and cables, the high-strength PVC composite material not only meets the national standard regulation, but also has the tensile strength value far higher than the lowest standard value specified by the national standard;
compared with the tensile strength of 18-23MPa of the sheath material in the prior art, the technical effect of remarkably improving the tensile strength performance of the sheath material is achieved;
secondly, the breaking tensile strain of the sheath material for the underground communication cable prepared in the embodiment is 425 and 452 percent;
compared with the tensile strain at break of H-70 which is more than or equal to 180 percent and is regulated in GB/T8815-2008 soft polyvinyl chloride plastic for electric wires and cables, the tensile strain at break not only accords with the national standard regulation, but also has the value of the tensile strain at break far higher than the lowest standard value regulated by the national standard;
compared with 294-380% of the breaking tensile strain of the sheath material in the prior art, the technical effect of remarkably improving the breaking tensile strain performance of the sheath material is achieved;
thirdly, the volume resistivity of the sheath material for the underground communication cable prepared in the embodiment is (2.2-3.5) multiplied by 10 at 20 DEG C10Ω·m；
The volume resistivity of the material at 20 ℃ is more than or equal to 1.0 multiplied by 10 compared with the volume resistivity of H-70 specified in GB/T8815-2008 soft polyvinyl chloride plastic for electric wires and cables8Compared with omega.m, the volume resistivity value of the material not only accords with the national standard, but also is far higher than the minimum standard value specified by the national standard;
compared with the volume resistivity (2.1-3.1) multiplied by 10 at 20 ℃ of the sheath material in the prior art8Compared with omega m, the technical effect of remarkably improving the volume resistivity performance of the sheath material is achieved;
fourthly, after the sheath material for the underground communication cable prepared in the embodiment is processed and molded, the sheath material is placed in an acid solution with the pH value of 1 to be soaked for 3 hours, then the sheath material is placed in the sun for 5 hours at normal temperature, and after repeated acid dipping and sun exposure are carried out for 20 times, no crack is observed on the surface of the sheath;
soaking the acid-soaked sheath material in an alkaline solution with the pH value of 14 for 3h, then exposing the sheath material to the sun at normal temperature for 5h, repeating the alkaline soaking and the exposing for 20 times, and observing that no crack exists on the surface of the sheath;
compared with the cable sheath material in the prior art, the cable sheath material is processed and molded, then is soaked in an acid solution with the pH value of 4 for 1h, then is exposed for 2h at normal temperature, and is repeatedly subjected to acid leaching and exposure for 15 times, and the small amount of fine lines with the thickness of about 1mm on the surface of the sheath is observed, so that the technical effect of remarkably improving the acid and alkali corrosion resistance of the sheath material is achieved.
Claims (9)
1. The sheath material for the underground communication cable is characterized by comprising the following raw materials in parts by weight: 40-80 parts of polyvinyl chloride, 10-20 parts of carbon fiber, 23-43 parts of moisture-proof filler, 16-31 parts of acid-base corrosion resistant filler and 17-29 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 10 to 20 mass parts of petroleum asphalt, 5 to 8 mass parts of natural asphalt and 8 to 15 mass parts of butyl rubber;
the acid and alkali corrosion resistant filler consists of 5-8 parts by mass of epoxy-phenolic paint, 3-5 parts by mass of polyurethane paint, 5-10 parts by mass of epoxy resin paint and 3-8 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler consists of 2-5 parts by mass of epoxidized soybean oil, 3-5 parts by mass of epoxidized fatty acid octyl ester, 4-7 parts by mass of tricresyl phosphate, 3-5 parts by mass of triphenyl phosphate and 5-7 parts by mass of trimellitic acid ester.
2. The sheath material of claim 1, wherein the sheath material comprises the following raw materials in parts by weight: 40 parts of polyvinyl chloride, 10 parts of carbon fiber, 23 parts of moisture-proof filler, 16 parts of acid-base corrosion resistant filler and 17 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 10 parts by mass of petroleum asphalt, 5 parts by mass of natural asphalt and 8 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 5 parts by mass of epoxy-phenolic paint, 3 parts by mass of polyurethane paint, 5 parts by mass of epoxy resin paint and 3 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 2 parts by mass of epoxidized soybean oil, 3 parts by mass of epoxidized fatty acid octyl ester, 4 parts by mass of tricresyl phosphate, 3 parts by mass of triphenyl phosphate and 5 parts by mass of trimellitic acid ester.
3. The sheath material of claim 1, wherein the sheath material comprises the following raw materials in parts by weight: 50 parts of polyvinyl chloride, 15 parts of carbon fiber, 33 parts of moisture-proof filler, 23 parts of acid-base corrosion resistant filler and 24 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 15 parts by mass of petroleum asphalt, 6 parts by mass of natural asphalt and 12 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 6 parts by mass of epoxy-phenolic paint, 4 parts by mass of polyurethane paint, 8 parts by mass of epoxy resin paint and 5 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 3 parts by mass of epoxidized soybean oil, 4 parts by mass of epoxidized fatty acid octyl ester, 7 parts by mass of tricresyl phosphate, 4 parts by mass of triphenyl phosphate and 6 parts by mass of trimellitic acid ester.
4. The sheath material of claim 1, wherein the sheath material comprises the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 20 parts of carbon fiber, 43 parts of moisture-proof filler, 31 parts of acid-base corrosion resistant filler and 29 parts of flexibility enhancing filler;
wherein, the moisture-proof filler consists of 20 parts by mass of petroleum asphalt, 8 parts by mass of natural asphalt and 15 parts by mass of butyl rubber;
the acid and alkali corrosion resistant filler consists of 8 parts by mass of epoxy-phenolic paint, 5 parts by mass of polyurethane paint, 10 parts by mass of epoxy resin paint and 8 parts by mass of trimeric ethylene anticorrosive paint;
the flexibility-increasing filler is composed of 5 parts by mass of epoxidized soybean oil, 5 parts by mass of epoxidized octyl fatty acid, 7 parts by mass of tricresyl phosphate, 5 parts by mass of triphenyl phosphate and 7 parts by mass of trimellitic acid ester.
5. A preparation method of a sheath material for an underground communication cable is characterized by comprising the following steps:
s1. preparation of moisture-proof filler
Adding 10-20 parts by mass of petroleum asphalt, 5-8 parts by mass of natural asphalt and 8-15 parts by mass of butyl rubber into a high-speed mixer, and carrying out mixing copolymerization for 20-60min at the temperature of 160-;
s2, preparation of acid and alkali corrosion resistant filler
Adding 5-8 parts by mass of epoxy-phenolic paint, 3-5 parts by mass of polyurethane paint, 5-10 parts by mass of epoxy resin paint and 3-8 parts by mass of ethylene trimer anticorrosive paint into a high-speed mixer, and mixing and copolymerizing for 30-50min at the temperature of 90-120 ℃ and the rotating speed of 450-600r/min to prepare the acid and alkali corrosion resistant filler;
s3, preparation of flexibility-enhanced filler
Adding 2-5 parts by mass of epoxidized soybean oil, 3-5 parts by mass of epoxidized fatty acid octyl ester, 4-9 parts by mass of tricresyl phosphate, 3-8 parts by mass of triphenyl phosphate and 5-10 parts by mass of trimellitate into a high-speed mixer, and carrying out mixed copolymerization for 40-90min at the temperature of 50-80 ℃ and the rotation speed of 350-90 r/min to prepare the flexibility-increasing filler;
s4, preparation of modified polyvinyl chloride copolymer
Adding the moisture-proof filler prepared in the step S1, the acid and alkali corrosion resistant filler prepared in the step S2, and the flexibility increasing filler prepared in the step S3, 40-80 parts by mass of polyvinyl chloride and 10-20 parts by mass of carbon fiber into an internal mixer, and mixing and internally mixing for 30-60min at the temperature of 60-90 ℃ and the pressure of 0.3-0.5MPa to prepare a modified polyvinyl chloride copolymer;
s5, preparation of sheath material for underground communication cable
And (4) adding the modified polyvinyl chloride copolymer prepared in the step S4 into a conical twin-screw extruder, and extruding and granulating at the temperature of 175 ℃ and 185 ℃ to prepare the sheath material for the underground communication cable.
6. The process according to claim 5, wherein the step S1 is carried out by mixing and copolymerizing at 180 ℃ and 750r/min for 40 min.
7. The process according to claim 5, wherein the step S2 is carried out by mixing and copolymerizing at a temperature of 105 ℃ and a rotation speed of 500r/min for 40 min.
8. The process according to claim 5, wherein in step S3, the mixture is copolymerized for 80min at a temperature of 60 ℃ and a rotation speed of 450 r/min.
9. The method of claim 5, wherein in step S4, the mixture is banburied for 50min at 80 ℃ and 0.5 MPa.
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| CN108410079A (en) * | 2018-01-24 | 2018-08-17 | 浙江汉维通信器材有限公司 | A kind of communication cable sheath material and preparation method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2609126Y (en) * | 2003-03-25 | 2004-03-31 | 德阳电缆股份有限公司 | High shielded outdoor data cable |
| KR100850048B1 (en) * | 2007-02-02 | 2008-08-04 | 주식회사 엘에스 | Resin composition for covering material of cable and cable using the same |
| CN105778295A (en) * | 2016-05-31 | 2016-07-20 | 中国石油集团钻井工程技术研究院 | Preparation method of polypropylene cable material and polypropylene cable material |
| CN106987070A (en) * | 2017-05-26 | 2017-07-28 | 东台市荣达塑业有限公司 | A kind of many wall PVC for communication pipe are formulated |
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