CN112280200B - Regenerated rubber for cable sheath and preparation method and application thereof - Google Patents
Regenerated rubber for cable sheath and preparation method and application thereof Download PDFInfo
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- CN112280200B CN112280200B CN202011172370.5A CN202011172370A CN112280200B CN 112280200 B CN112280200 B CN 112280200B CN 202011172370 A CN202011172370 A CN 202011172370A CN 112280200 B CN112280200 B CN 112280200B
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000012492 regenerant Substances 0.000 claims abstract description 34
- 239000002699 waste material Substances 0.000 claims abstract description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 23
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000004014 plasticizer Substances 0.000 claims abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 13
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012188 paraffin wax Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 21
- GUUVPOWQJOLRAS-UHFFFAOYSA-N Diphenyl disulfide Chemical compound C=1C=CC=CC=1SSC1=CC=CC=C1 GUUVPOWQJOLRAS-UHFFFAOYSA-N 0.000 claims description 20
- GVPWHKZIJBODOX-UHFFFAOYSA-N dibenzyl disulfide Chemical compound C=1C=CC=CC=1CSSCC1=CC=CC=C1 GVPWHKZIJBODOX-UHFFFAOYSA-N 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 14
- 238000004513 sizing Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 9
- 238000004132 cross linking Methods 0.000 claims description 9
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical group CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000012744 reinforcing agent Substances 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- 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 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 2
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical group CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 2
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical group [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 2
- 229920006235 chlorinated polyethylene elastomer Polymers 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000001172 regenerating effect Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004073 vulcanization 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
- 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
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or compounds containing halogen
- C08L23/286—Chlorinated polyethylene
-
- 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
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention belongs to the field of cable jackets, and discloses a regenerated rubber for a cable jacket, a preparation method and application thereof, wherein the regenerated rubber for the cable jacket mainly comprises the following raw materials: regenerant masterbatch and waste irradiation cable sheath rubber; the regenerant masterbatch is mainly prepared from the following raw materials: chlorinated polyethylene, a regenerating agent, a plasticizer, calcium carbonate, magnesium oxide and paraffin. The regenerant is prepared into the masterbatch in advance, so that the masterbatch is conveniently blended with the waste irradiation sheath rubber, the dispersibility and operability of the masterbatch are improved, and the prepared reclaimed rubber can be applied to cable sheath rubber.
Description
Technical Field
The invention belongs to the field of cable jackets, and particularly relates to regenerated rubber for a cable jacket, and a preparation method and application thereof.
Background
The traditional method of rubber wires and cables adopts a high-temperature steam vulcanization process for production, which requires a boiler to provide high-temperature steam of about 200 ℃, has high energy consumption and high production cost, and has the increasingly strict environmental protection management and control of the boiler in factories in recent years. In this context, the application of electron accelerator irradiation processing in wire and cable products is increasingly emphasized, and a good development trend is presented. Unlike traditional cross-linking mode, it needs no high temperature steam in boiler, and has high production efficiency and environment friendship. With the application of the electron accelerator in the cable industry in China, manufacturers adopting irradiation processing production of rubber cables are more and more, and the proportion of rubber irradiation wires and cables in the cables is larger and larger.
The wire and cable often need to be stripped to a certain length in the processing process, the core wire or the conductor is exposed, so that a metal terminal or a plug is made, and the irradiation cable is not exceptional, so that a large amount of waste rubber is produced by a cable manufacturer every day, and the waste rubber can not be directly recycled because of being crosslinked and non-thermoplastic, the cable manufacturer often sells the cable as waste, the price is reduced from 500 yuan per ton to 300 yuan per ton before years, the society is continuously improved, and enterprises possibly pay money to enable special manufacturers or institutions to treat the waste. Under the background, how to treat the waste rubber and recycle the waste rubber is an urgent task for a cable enterprise.
Disclosure of Invention
The invention aims to provide a regenerated rubber for a cable sheath, a preparation method and application thereof, wherein the regenerated rubber for the cable sheath is prepared by blending waste irradiation sheath rubber and a regenerant masterbatch, and the cable sheath rubber with qualified performance can be produced.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the regenerated rubber for the cable sheath mainly comprises the following raw materials: regenerant masterbatch and waste irradiation cable sheath rubber; the regenerant masterbatch mainly comprises the following raw materials: chlorinated polyethylene, a regenerating agent, a plasticizer, a filler, an acid absorber and paraffin wax.
Preferably, the regenerated rubber for the cable sheath mainly comprises the following raw materials in parts by weight: 2-4 parts of regenerant masterbatch and 95-105 parts of waste irradiation cable sheath rubber; the regenerant masterbatch mainly comprises the following raw materials in parts by weight: 100-110 parts of chlorinated polyethylene, 5-10 parts of regenerant, 15-25 parts of plasticizer, 40-60 parts of filler, 5-10 parts of acid absorber and 1-2 parts of paraffin.
Preferably, the waste irradiation cable sheath rubber is prepared by taking chlorinated polyethylene rubber as a base material, adding a processing aid, blending, extruding, and then carrying out irradiation crosslinking.
Preferably, the Chlorinated Polyethylene (CPE) has a chlorine content of 35% and a mooney viscosity ML (1+4) at 125 ℃ of from 70 to 80 for a rubber CPE (model CM 6235).
Preferably, the regenerant is one or two of diphenyl disulfide (DPDS) and dibenzyl disulfide (DBDS). Diphenyl disulfide (DPDS) is a white crystal with a melting point of 61-62 ℃, a molecular weight of 218.34, a density of 1.35g/ml, a boiling point of 310 ℃, and dibenzyl disulfide (DBDS) is a white plate-like or needle-like crystal with a melting point of 70-72 ℃, a molecular weight of 246.38, a density of 1.3g/ml, and a boiling point of 270 ℃.
Preferably, the plasticizer is dioctyl terephthalate.
The content of ester of dioctyl terephthalate is more than or equal to 99.8%, the flash point is more than or equal to 210 ℃, the acid value is less than or equal to 0.15mg KOH/g, and the viscosity is (25 ℃) 60-70 mPa.s.
Preferably, the filler is calcium carbonate. The calcium carbonate is 2500 meshes, 50% of the particle size is distributed in 1-5 mu m, and the pH value is 8.0-10.0.
Preferably, the acid acceptor is magnesium oxide. The magnesium oxide is selected from medium-activity magnesium oxide with content more than or equal to 90%, iodine absorption value of 60-80mg/g and particle diameter D50 of 3-4 um. The medium-activity magnesium oxide has the function of acid absorption and can be used as a stabilizer.
The preparation method of the regenerated rubber of the cable sheath comprises the following steps:
(1) Mixing chlorinated polyethylene, a regenerant, a filler, an acid absorber, a plasticizer and paraffin wax, putting into an internal mixer for mixing, heating and discharging glue to obtain a glue stock;
(2) Mixing the sizing material in an open mill, cooling, rolling pages, and cooling to obtain a regenerant mother film;
(3) And (3) putting the regenerant mother rubber sheet and the waste irradiation cable sheath rubber sheet into a thin-pass machine for thin-pass to obtain the regenerated rubber of the cable sheath.
Preferably, in the step (1), the mixing time is 3-10min, and the temperature is 100-110 ℃.
Preferably, in the step (1), the temperature of the adhesive discharging is 100-110 ℃.
Preferably, in the step (2), the mixing time is 3-10min, and the temperature is 80-90 ℃.
Preferably, in the step (3), the time of the thin pass is 10-20min, and the thin pass is to alternately punch a triangle packet and a transverse packet on the thin pass machine.
The cable sheath sizing material mainly comprises the following raw materials in parts by weight: 100-110 parts of chlorinated polyethylene, 40-60 parts of cable sheath reclaimed rubber, 18-24 parts of reinforcing agent, 70-80 parts of filler, 1-6 parts of stabilizer, 15-25 parts of plasticizer, 10-20 parts of flame retardant, 2-4 parts of sensitizer and 1-3 parts of lubricant.
Preferably, the reinforcing agent is carbon black.
The carbon black has an iodine absorption value of 82+ -7 g/kg, a DBP absorption value of 102+ -7 (10-5 m 3/kg), and a CTAB adsorption specific surface area of 76-88 (103 m 2 N330 reinforced carbon black with the average grain diameter of 27-34nm and the screen residue of 45 mu m is less than or equal to 0.10 percent.
Preferably, the filler is calcium carbonate and talc.
The calcium carbonate is 2500 meshes, 50% of the particle size is distributed in 1-5 mu m, and the pH value is heavy calcium carbonate of 8.0-10.0; the talcum powder is 1500 meshes, 50% of the particle size is distributed in 7-10 mu m, the insoluble hydrochloric acid content is more than or equal to 85%, the loss on ignition is less than or equal to 19%, and the magnesium oxide content is more than or equal to 30%.
Preferably, the stabilizer is a calcium-zinc environment-friendly stabilizer.
Preferably, the plasticizer is dioctyl terephthalate.
Preferably, the sensitizer is trimethylolpropane trimethacrylate.
Preferably, the lubricant is paraffin wax.
The preparation method of the cable sheath sizing material comprises the following steps:
adding the reclaimed rubber into an internal mixer, adding a reinforcing agent, a filler, a flame retardant, a lubricant, CPE and a plasticizer for primary mixing, carrying out secondary mixing in an open mill, cooling, rolling pages, and cooling to obtain the cable sheath rubber material.
Preferably, the time of the first mixing is 5-10min, and the time of the second mixing is 5-10min.
Preferably, the temperature of the first and second mixing is 120 ℃ to 130 ℃.
Preferably, the temperature is reduced to 80-90 ℃.
The invention also provides a cable sheath, which is prepared from the cable sheath sizing material.
The invention also provides a preparation method of the cable sheath, which comprises the following steps: extruding the cable sheath sizing material in an extruder, and performing irradiation crosslinking to obtain the cable sheath.
Preferably, the temperature of the head of the extruder is 120-130 ℃, the temperature of the first area of the extruder body is 100-110 ℃, the temperature of the second area of the extruder body is 90-100 ℃, and the extrusion speed is 100-110 m/min.
Preferably, the irradiation crosslinking is performed at an irradiation dose of 11-14MRad.
When the cable selection specification is YZW4X1.0, the irradiation crosslinking dose is 12M, the energy is 1.6mev, the beam current is 1-45Ma, and the speed is 120M/min.
The invention also provides a cable, which comprises the protective layer formed by the cable sheath sizing material.
The invention has the advantages that:
1. the regenerant is prepared into the masterbatch in advance, so that the masterbatch is conveniently blended with the waste irradiation sheath rubber, the dispersibility and operability of the masterbatch are improved, and the prepared reclaimed rubber can be applied to cable sheath rubber.
2. The invention adopts the shearing effect of the thin-pass and other processing technologies as an auxiliary means, increases the sulfur-decomposing effect of the regenerant, and is convenient for regeneration and utilization.
3. According to the invention, after the discarded waste irradiation sheath rubber and the regenerant masterbatch are mixed and dissolved to obtain sulfur, the cable material is produced by mixing the waste irradiation sheath rubber and the new masterbatch in an internal mixer, so that the purposes of reutilization of the waste irradiation sheath rubber and reduction of production cost are achieved.
Detailed Description
For a thorough understanding of the present invention, the following description of the preferred embodiments of the present invention will be provided in conjunction with examples to further illustrate the features and advantages of the present invention, and it will be understood by those skilled in the art that the scope of the present invention is defined by the appended claims.
The specific conditions are not noted in the examples of the present invention, and are carried out according to conventional conditions or conditions suggested by the manufacturer. The raw materials, reagents, etc. used, which are not noted to the manufacturer, are conventional products commercially available.
Example 1: preparation of regenerated rubber for cable sheath
The regenerated rubber for the cable sheath mainly comprises the following raw materials in parts by weight: 3 parts of regenerant masterbatch and 100 parts of waste irradiation cable sheath rubber; the regenerant masterbatch comprises the following raw materials in parts by weight: 100 parts of CPE, 4 parts of diphenyl disulfide, 3 parts of dibenzyl disulfide, 20 parts of dioctyl terephthalate, 50 parts of calcium carbonate, 7 parts of magnesium oxide and 1.6 parts of paraffin.
The preparation method of the regenerated rubber of the cable sheath comprises the following steps:
(1) Mixing Chlorinated Polyethylene (CPE), diphenyl disulfide, dibenzyl disulfide, calcium carbonate, magnesium oxide, dioctyl terephthalate and paraffin, putting into an internal mixer for mixing, heating to 110 ℃, and discharging rubber to obtain rubber material;
(2) Mixing the sizing material in an open mill for 5min, cooling to 90 ℃, rolling pages, and cooling to obtain a regenerant mother film with the width of 150-250mm and the thickness of 2-3mm;
(3) And (3) putting the regenerant mother rubber sheet and the waste irradiation cable sheath rubber sheet into a thin-pass machine for thin-pass for 15min to obtain the regenerated rubber with the thickness of 1 mm.
Example 2: preparation of regenerated rubber for cable sheath
The regenerated rubber for the cable sheath mainly comprises the following raw materials in parts by weight: 2 parts of regenerant masterbatch and 100 parts of waste irradiation cable sheath rubber; the regenerant masterbatch comprises the following raw materials in parts by weight: 100 parts of CPE, 4 parts of diphenyl disulfide, 3 parts of dibenzyl disulfide, 20 parts of dioctyl terephthalate, 55 parts of calcium carbonate, 8 parts of magnesium oxide and 2 parts of paraffin.
The preparation method of the regenerated rubber of the cable sheath comprises the following steps:
(1) Mixing Chlorinated Polyethylene (CPE), diphenyl disulfide, dibenzyl disulfide, calcium carbonate, magnesium oxide, dioctyl terephthalate and paraffin, putting into an internal mixer for mixing, heating to 110 ℃, and discharging rubber to obtain rubber material;
(2) Mixing the sizing material in an open mill for 5min, cooling to 90 ℃, rolling pages, and cooling to obtain a regenerant mother film with the width of 150-250mm and the thickness of 2-3mm;
(3) And (3) putting the regenerant mother rubber sheet and the waste irradiation cable sheath rubber sheet into a thin-pass machine for thin-pass for 15min to obtain the regenerated rubber with the thickness of 1 mm.
Example 3: preparation of regenerated rubber for cable sheath
The regenerated rubber for the cable sheath mainly comprises the following raw materials in parts by weight: 4 parts of regenerant masterbatch and 100 parts of waste irradiation cable sheath rubber; the regenerant masterbatch comprises the following raw materials in parts by weight: 100 parts of CPE, 4 parts of diphenyl disulfide, 3 parts of dibenzyl disulfide, 20 parts of dioctyl terephthalate, 42 parts of calcium carbonate, 5 parts of magnesium oxide and 1 part of paraffin.
The preparation method of the regenerated rubber of the cable sheath of the example is basically the same as that of the example 1, except that materials are added according to the raw material composition of the example.
Cable jacket compound examples 4-6 and cable jacket compound comparative example 1
The cable jacket compounds of examples 4-6 were prepared with the components and parts in Table 1:
TABLE 1
The preparation method of the cable sheath sizing material comprises the following steps:
adding the regenerated rubber of the cable sheath into an internal mixer, adding a reinforcing agent, a filler, a flame retardant, a lubricant, CPE and a plasticizer, mixing in an open mill, cooling to obtain a film, rolling pages, and cooling to obtain the cable sheath rubber.
Examples 7 to 9
The cable jackets of examples 7-9, the cables contained the protective layer formed from the cable jacket compounds of examples 4-6.
The method for preparing the cable sheath of examples 7-9 comprises the following steps: extruding the cable sheath sizing material in an extruder with the temperature of a machine head of 120-130 ℃, the temperature of a first area of the machine body of 100-110 ℃, the temperature of a second area of the machine body of 90-100 ℃ and the extrusion speed of 100-110M/min, and carrying out irradiation crosslinking at the irradiation crosslinking dosage of 12M, the energy of 1.6mev, the beam current of 1-45Ma and the speed of 120M/min to obtain the cable sheath.
Example 10
The cable of example 10, which contains the protective layer formed by the cable sheath compounds of examples 4-6.
Comparative example 1
The proportions of the raw materials are shown in the table, the regenerated rubber of the cable sheath prepared in the example 1 is not added in the rubber material, and the process is the same as that of the regenerated rubber.
Performance testing
The cable jackets prepared using cable jacket sizes example 4-6 and the YZW cord jacket prepared using the size of comparative example 1 were subjected to performance testing with the results shown in the following table:
TABLE 2
TABLE 3 Table 3
As can be seen from tables 2 and 3, the YZW flexible wire sheath prepared by adding the regenerated rubber of the cable sheath prepared by the invention and carrying out irradiation crosslinking on the regenerated rubber of different proportions has the same extrusion speed, low-temperature performance, thermal extension and no obvious difference between flame retardant performance and the novel material compared with the comparative example 1; the regenerated rubber is added in a proper proportion to prepare the cable sheath rubber, so that the GB5013 2008 standard requirement can be met, and the purposes of reutilization of waste irradiation sheath rubber and reduction of production cost are achieved.
The above description of a cable sheath reclaimed rubber, its preparation method and application is provided in detail, and specific examples are used herein to illustrate the principles and embodiments of the invention, and the above examples are provided to facilitate understanding of the method and its core ideas of the invention, including the best mode, and to enable any person skilled in the art to practice the invention, including making and using any device or system, and to practice any incorporated method. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims. The scope of the patent protection is defined by the claims and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (6)
1. The regenerated rubber for the cable sheath is characterized by mainly comprising the following raw materials in parts by weight: 2-4 parts of regenerant masterbatch and 95-105 parts of waste irradiation cable sheath rubber; the regenerant masterbatch mainly comprises the following raw materials in parts by weight: 100-110 parts of chlorinated polyethylene, 5-10 parts of regenerant, 15-25 parts of plasticizer, 40-60 parts of filler, 5-10 parts of acid absorber and 1-2 parts of paraffin;
the regenerated rubber for the cable sheath is prepared by the following preparation method:
(1) Mixing chlorinated polyethylene, a regenerant, a filler, an acid absorber, a plasticizer and paraffin wax, putting into an internal mixer for mixing, heating and discharging glue to obtain a glue stock;
(2) Mixing the sizing material in an open mill, cooling, rolling pages, and cooling to obtain a regenerant mother film;
(3) Putting the regenerant mother rubber sheet and the waste irradiation cable sheath rubber sheet into a thin-pass machine for thin-pass to obtain cable sheath reclaimed rubber;
the waste irradiation cable sheath rubber is prepared by taking chlorinated polyethylene rubber as a base material, adding a processing aid, blending, refining, extruding, and carrying out irradiation crosslinking on the cable sheath, wherein part of the outer sheath needs to be stripped during production and processing of the cable sheath, and the collected waste irradiation cable sheath rubber is used for the production and processing of the cable sheath;
the regenerant is one or two of diphenyl disulfide and dibenzyl disulfide; the plasticizer is dioctyl terephthalate;
the width of the regenerant mother film is 150-250mm, and the thickness is 2-3mm;
in the step (3), the thin pass time is 10-20min, and the thin pass is to alternately punch triangular bags and transverse bags on a thin pass machine.
2. The cable jacket reclaimed rubber of claim 1, wherein the filler is calcium carbonate; the acid absorbing agent is magnesium oxide.
3. The cable sheath sizing material is characterized by mainly comprising the following raw materials in parts by weight: 100-110 parts of chlorinated polyethylene, 40-60 parts of the regenerated rubber of the cable sheath according to any one of claims 1-2, 18-24 parts of reinforcing agent, 70-80 parts of filler, 1-6 parts of stabilizer, 15-25 parts of plasticizer, 10-20 parts of flame retardant, 2-4 parts of sensitizer and 1-3 parts of lubricant.
4. The cable jacket composition of claim 3, wherein the reinforcing agent is carbon black; the filler is calcium carbonate and talcum powder; the stabilizer is a calcium-zinc stabilizer; the sensitizer is trimethylolpropane trimethacrylate.
5. A method of preparing a cable jacket compound according to any of claims 3 to 4, comprising the steps of:
adding the regenerated rubber of the cable sheath into an internal mixer, adding a reinforcing agent, a filler, a flame retardant, a lubricant, chlorinated polyethylene and a plasticizer for mixing, mixing in an open mill, cooling, rolling pages, and cooling to obtain the cable sheath rubber.
6. A cable comprising a protective layer formed from the cable jacket composition of claim 3 or 4.
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