WO2023030429A1 - Cable sheath processing method based on blending of silicone rubber and chlorinated polyethylene rubber - Google Patents

Cable sheath processing method based on blending of silicone rubber and chlorinated polyethylene rubber Download PDF

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Publication number
WO2023030429A1
WO2023030429A1 PCT/CN2022/116430 CN2022116430W WO2023030429A1 WO 2023030429 A1 WO2023030429 A1 WO 2023030429A1 CN 2022116430 W CN2022116430 W CN 2022116430W WO 2023030429 A1 WO2023030429 A1 WO 2023030429A1
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Prior art keywords
chlorinated polyethylene
rubber
blending
silicone rubber
polyethylene rubber
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PCT/CN2022/116430
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French (fr)
Chinese (zh)
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施荣兵
温继滦
李乐阳
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飞达科技有限公司
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Publication of WO2023030429A1 publication Critical patent/WO2023030429A1/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/26—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/20—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
    • B29B7/286—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring properties of the mixture, e.g. temperature, density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a method for processing a cable sheath blended with silicone rubber and chlorinated polyethylene rubber, and belongs to the technical field of cables.
  • the current motor lead cable is mainly composed of multiple power lines and signal lines, and then the flame-retardant polyvinyl chloride (PVC) is used as the outer sheath, that is, the sheath.
  • PVC polyvinyl chloride
  • polyvinyl chloride is a thermoplastic material, and its physical properties vary greatly with temperature.
  • Silicone rubber has good low temperature resistance, and generally can still work at -55°C, and its heat resistance is also outstanding, and can work for a long time at 180°C.
  • Chlorinated polyethylene (CPE) rubber is a chlorinated polymer obtained by chlorination of high-density polyethylene (HDPE), which has better cold resistance, aging resistance, ozone resistance, oil resistance, and flame resistance.
  • HDPE high-density polyethylene
  • CPE chlorinated polyethylene
  • silicone rubber and chlorinated polyethylene (CPE) rubber do not produce chemical bond reactions, so how to combine the two together to develop a cable sheath combined with silicone rubber and chlorinated polyethylene rubber has always been an issue. A difficult problem for cable manufacturers to overcome.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, and provide a method of vulcanization and blending, so that silicone rubber and chlorinated polyethylene rubber coexist in the form of mutual cross-bonding, retain their respective characteristics, and the cable sheath is more resistant to high and low temperature and anti-corrosion.
  • the technical scheme of the cable sheath processing method for the blending of silicone rubber and chlorinated polyethylene rubber of the present invention is: it is characterized in that it includes the first step, taking silicone rubber and auxiliary materials and putting them into an internal mixer for mixing. Put in the silicone rubber raw material, white carbon black and silicone oil in sequence for mixing, the mixing temperature is 85-90°C, and the blending time is 400-500S. After the blending is uniform, the silicone masterbatch is obtained, and it is taken out for later use;
  • the second step take chlorinated polyethylene rubber and auxiliary materials and put them into an internal mixer for mixing.
  • the kneading temperature is 85 ⁇ 90 °C
  • the blending time is 500 ⁇ 600S
  • the chlorinated polyethylene rubber masterbatch is obtained, and it is taken out for use;
  • the third step is to put the silica gel masterbatch and chlorinated polyethylene rubber masterbatch into the internal mixer according to the weight ratio for blending.
  • the blending temperature is 85-90°C and the blending time is 200-300S. After the blending is uniform, take it out. After being placed on an open mill and being coiled and parked for at least 8 hours, a blend of silicone rubber and chlorinated polyethylene rubber is obtained;
  • the fourth step is to put the blend of silicone rubber and chlorinated polyethylene rubber after parking for 8 hours into the internal mixer, add 2 to 4 parts by mass of vulcanizing agent and knead, the kneading temperature is not higher than 90 ° C, and the kneading time is No more than 1min, after the mixing is uniform, the material is unloaded, and then put into the open mill for coiling, and then put into the sheet discharge machine to discharge the sheet, and then cooled to below 50°C by the cooler, and finally put into the sheet stacker for stacking. box spare;
  • the fifth step is to feed the blended silicone rubber and chlorinated polyethylene rubber into the extrusion molding machine after the laminations are framed, and extrude the silicone rubber and chlorine under the action of the extrusion die.
  • the polyethylene rubber blend is extruded and wrapped around the wire core, and shaped into a cable. After the shape is passed through the steam cross-linking pipeline with a pressure of 0.8-1.2 MPa, continuous cross-linking is carried out for 2-3 minutes, and the silicone rubber and Cables with chlorinated polyethylene rubber sheath.
  • the invention discloses a cable sheath processing method for blending silicone rubber and chlorinated polyethylene rubber.
  • the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch are kneaded and formed by an internal mixer respectively, and then the The two masterbatches were blended together in an internal mixer, and a vulcanizing agent was added after blending, so that the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch could be fully mixed, but the two rubbers did not undergo chemical reactions from chemical analysis. It coexists in a physical mixed form of cross-combination. After coexistence, it does not exclude each other and does not layer. Each retains its own performance and characteristics, and all properties are between the properties of the two rubbers.
  • the proportion of silicone rubber and chlorinated polyethylene rubber is different, and the comprehensive properties are also different.
  • the performance of the molded cable sheath is between the two types of rubber, complementing each other, solving the weak point of poor tear strength of silicone rubber, and improving the heat resistance of chlorinated polyethylene rubber. Ensure safe use of cables.
  • the vulcanizing agent is a peroxide vulcanizing agent such as dicumyl peroxide DCP.
  • the colorant is toner such as carbon black.
  • the plasticizer is trimellitic anhydride TOTM, dioctyl sebacate DOS and the like. Described stabilizing agent is magnesium oxide MgO etc.
  • the weight ratio of the silica gel and the chlorinated polyethylene rubber is 20% to 80%: 80% to 20%, and the optimal weight ratio is 30% to 50%: 70% to 50%, and the respective weight ratios are adjusted according to different application scenarios. Proportion.
  • the invention relates to a method for processing a cable sheath blended with silicone rubber and chlorinated polyethylene rubber.
  • Rubber raw materials, white carbon black and silicone oil and other auxiliary materials are mixed at a mixing temperature of 85-90°C and a blending time of 400-500 seconds. After the blending is uniform, the silica gel masterbatch is obtained and taken out for later use;
  • the second step take chlorinated polyethylene rubber and auxiliary materials and put them into an internal mixer for mixing.
  • chlorinated polyethylene rubber raw materials talcum powder, white carbon black, plasticizer and stabilizer
  • the auxiliary materials the mixing temperature is 85-90°C, and the blending time is 500-600S.
  • the chlorinated polyethylene rubber masterbatch is obtained, and it is taken out for later use;
  • the third step is to put the silica gel masterbatch and chlorinated polyethylene rubber masterbatch into the internal mixer according to the weight ratio for blending.
  • the blending temperature is 85-90°C and the blending time is 200-300S. After the blending is uniform, take it out. After being placed on an open mill and being coiled and parked for at least 8 hours, a blend of silicone rubber and chlorinated polyethylene rubber is obtained;
  • the fourth step is to put the blend of silicone rubber and chlorinated polyethylene rubber after parking for 8 hours into the internal mixer, add 2 to 4 parts by mass of vulcanizing agent and knead, the kneading temperature is not higher than 90 ° C, and the kneading time is No more than 1min, after the mixing is uniform, the material is unloaded, and then put into the open mill for coiling, and then put into the sheet discharge machine to discharge the sheet, and then cooled to below 50°C by the cooler, and finally put into the sheet stacker for stacking. box spare;
  • the fifth step is to feed the blended silicone rubber and chlorinated polyethylene rubber into the extrusion molding machine after the laminations are framed, and extrude the silicone rubber and chlorine under the action of the extrusion die.
  • the polyethylene rubber blend is extruded and wrapped around the wire core, and shaped into a cable. After the shape is passed through the steam cross-linking pipeline with a pressure of 0.8-1.2 MPa, continuous cross-linking is carried out for 2-3 minutes, and the silicone rubber and Cables with chlorinated polyethylene rubber sheath.
  • the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch are first mixed and formed through an internal mixer, and then the two masterbatches are put into the internal mixer for blending, and after blending, a vulcanizing agent is added to make the silicone rubber
  • the masterbatch and chlorinated polyethylene rubber masterbatch can be fully mixed, and then coiled and parked for at least 8 hours to obtain a blend of silicone rubber and chlorinated polyethylene rubber, then put the blend into the internal mixer, and add 2 ⁇ 4 parts by mass of vulcanizing agent is kneaded again, after kneading evenly, the material is cut, put into the open mill for coiling, and then put into the sheet discharging machine to discharge the sheet, then cooled by the cooling machine, and finally put into the stacking machine for stacking Framed for standby, the silicone rubber and chlorinated polyethylene rubber blended material after the stacked frame is sent to the rubber extrusion molding machine, and the silicone rubber and chlorinated polyethylene rubber blended material is extrude
  • the vulcanizing agent is a peroxide vulcanizing agent such as dicumyl peroxide DCP.
  • the colorant is toner such as carbon black.
  • the plasticizer is trimellitic anhydride TOTM, dioctyl sebacate DOS and the like.
  • the stabilizer is magnesium oxide MgO and the like.
  • the weight ratio of the silica gel and the chlorinated polyethylene rubber is 20% to 80%: 80% to 20%, and the optimal weight ratio is 30% to 50%: 70% to 50%, and the respective weight ratios are adjusted according to different application scenarios. Proportion.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Insulated Conductors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)

Abstract

A cable sheath processing method based on blending of silicone rubber and chlorinated polyethylene rubber, comprising: step I, taking silicone rubber and auxiliary materials, and putting same into an internal mixer for mixing so as to obtain a silica gel masterbatch; step II, taking chlorinated polyethylene rubber and auxiliary materials, and putting same into the internal mixer for mixing so as to obtain a chlorinated polyethylene rubber masterbatch; step III, blending the silica gel masterbatch and the chlorinated polyethylene rubber masterbatch, and rolling and standing for at least 8 hours so as to obtain a silicone rubber and chlorinated polyethylene rubber blend; step IV, putting the silicone rubber and chlorinated polyethylene rubber blend into the internal mixer, adding 2-4 parts by mass of a vulcanizing agent for mixing, putting the mixture into an open mill for rolling, then putting the mixture into a sheet discharging machine for sheet discharging, then cooling the sheets by means of a cooling machine, and finally putting the sheets into a lamination machine for lamination and framing for later use; and step V, feeding the laminated sheets into a rubber extrusion molding machine, extruding the laminated sheets at the periphery of a wire core, forming a cable by shaping, and then passing through a steam cross-linking pipeline for continuous crosslinking, so as to obtain a cable having a silicone rubber and chlorinated polyethylene rubber sheath.

Description

硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法Processing method of cable sheath blended with silicone rubber and chlorinated polyethylene rubber 技术领域technical field
本发明涉及一种硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，属于电缆技术领域。The invention relates to a method for processing a cable sheath blended with silicone rubber and chlorinated polyethylene rubber, and belongs to the technical field of cables.
背景技术Background technique
目前的电机引接电缆主要由多根动力线和信号线组成，再由阻燃聚氯乙烯(PVC)作外护套，即外皮。但聚氯乙烯是一种热塑性材料，其物理性能随温度变化很大，当电动车超负载运行时，动力线电流很大，导体发热导致电缆外皮受热软化，更严重时会出现熔融，破坏了外皮的保护作用。硅橡胶耐低温性能良好，一般在-55℃下仍能工作，其耐热性能也很突出，在180℃下可长期工作。氯化聚乙烯(CPE)橡胶是由高密度聚乙烯(HDPE)经氯化而制得的一种氯化聚合物，具有更为优良的耐寒、耐老化、耐臭氧、耐油、耐燃性，用作电缆外皮的主体材料是它的重要用途之一。但在实际生产中，硅橡胶和氯化聚乙烯(CPE)橡胶不产生化学键反应，因此，如何将两者结合在一起，开发一种硅橡胶和氯化聚乙烯橡胶结合的电缆外皮，一直是电缆厂家攻克的难题。The current motor lead cable is mainly composed of multiple power lines and signal lines, and then the flame-retardant polyvinyl chloride (PVC) is used as the outer sheath, that is, the sheath. However, polyvinyl chloride is a thermoplastic material, and its physical properties vary greatly with temperature. When the electric vehicle is overloaded, the current of the power line is very large, and the heat of the conductor will cause the cable sheath to be heated and softened. In severe cases, it will melt and damage the cable. The protective effect of the outer skin. Silicone rubber has good low temperature resistance, and generally can still work at -55°C, and its heat resistance is also outstanding, and can work for a long time at 180°C. Chlorinated polyethylene (CPE) rubber is a chlorinated polymer obtained by chlorination of high-density polyethylene (HDPE), which has better cold resistance, aging resistance, ozone resistance, oil resistance, and flame resistance. As the main material of the cable sheath is one of its important uses. However, in actual production, silicone rubber and chlorinated polyethylene (CPE) rubber do not produce chemical bond reactions, so how to combine the two together to develop a cable sheath combined with silicone rubber and chlorinated polyethylene rubber has always been an issue. A difficult problem for cable manufacturers to overcome.
发明内容Contents of the invention
本发明的目的是为了克服已有技术的缺点，提供一种采用硫化共混方式，使硅橡胶和氯化聚乙烯橡胶以相互交叉结合的形式共存，保留各自特性，电缆外皮更耐高低温和抗撕裂性能更强的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法。The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a method of vulcanization and blending, so that silicone rubber and chlorinated polyethylene rubber coexist in the form of mutual cross-bonding, retain their respective characteristics, and the cable sheath is more resistant to high and low temperature and anti-corrosion. A method for processing cable sheaths blended with silicone rubber and chlorinated polyethylene rubber with stronger tear performance.
本发明硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法的技术方案是：其特征在于包括第一步，取硅橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入硅橡胶原料、白炭黑和硅油进行混炼，混炼温度85～90℃，共混时间400～500S，共混均匀后得到硅胶母料，取出备用；The technical scheme of the cable sheath processing method for the blending of silicone rubber and chlorinated polyethylene rubber of the present invention is: it is characterized in that it includes the first step, taking silicone rubber and auxiliary materials and putting them into an internal mixer for mixing. Put in the silicone rubber raw material, white carbon black and silicone oil in sequence for mixing, the mixing temperature is 85-90°C, and the blending time is 400-500S. After the blending is uniform, the silicone masterbatch is obtained, and it is taken out for later use;
第二步，取氯化聚乙烯橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入氯化聚乙烯橡胶原料、滑石粉、白炭黑、增塑剂和稳 定剂进行混炼，混炼温度85～90℃，共混时间500～600S，共混均匀后得到氯化聚乙烯橡胶母料，取出备用；In the second step, take chlorinated polyethylene rubber and auxiliary materials and put them into an internal mixer for mixing. When mixing, put in chlorinated polyethylene rubber raw materials, talcum powder, white carbon black, plasticizer and stabilizer in sequence Carry out kneading, the kneading temperature is 85 ~ 90 ℃, the blending time is 500 ~ 600S, after the blending is uniform, the chlorinated polyethylene rubber masterbatch is obtained, and it is taken out for use;
第三步，将硅胶母料和氯化聚乙烯橡胶母料按重量比例一起投入密炼机中进行共混，共混温度85～90℃，共混时间200～300S，共混均匀后取出，放在开炼机上打卷停放至少8小时后，得到硅橡胶和氯化聚乙烯橡胶共混料；The third step is to put the silica gel masterbatch and chlorinated polyethylene rubber masterbatch into the internal mixer according to the weight ratio for blending. The blending temperature is 85-90°C and the blending time is 200-300S. After the blending is uniform, take it out. After being placed on an open mill and being coiled and parked for at least 8 hours, a blend of silicone rubber and chlorinated polyethylene rubber is obtained;
第四步，将停放8小时后的硅橡胶和氯化聚乙烯橡胶共混料投入密炼机中，添加2～4质量份的硫化剂混炼，混炼温度不大于90℃，混炼时间不超过1min，待混炼均匀后下料，再投入开炼机打卷，接着投入到出片机中出片，然后经冷却机冷却至50℃以下后，最后投入叠片机中叠片装框备用；The fourth step is to put the blend of silicone rubber and chlorinated polyethylene rubber after parking for 8 hours into the internal mixer, add 2 to 4 parts by mass of vulcanizing agent and knead, the kneading temperature is not higher than 90 ° C, and the kneading time is No more than 1min, after the mixing is uniform, the material is unloaded, and then put into the open mill for coiling, and then put into the sheet discharge machine to discharge the sheet, and then cooled to below 50°C by the cooler, and finally put into the sheet stacker for stacking. box spare;
第五步，将叠片装框后的硅橡胶和氯化聚乙烯橡胶共混料送入挤橡成型机中，通过挤橡挤压，并在挤压模具的作用下，将硅橡胶和氯化聚乙烯橡胶共混料挤包在线芯外围，定型成电缆，定型后的电缆再穿过施加0.8～1.2MPa压力的蒸汽交联管道，进行2—3分钟连续交联，得到带硅橡胶和氯化聚乙烯橡胶外皮的电缆。The fifth step is to feed the blended silicone rubber and chlorinated polyethylene rubber into the extrusion molding machine after the laminations are framed, and extrude the silicone rubber and chlorine under the action of the extrusion die. The polyethylene rubber blend is extruded and wrapped around the wire core, and shaped into a cable. After the shape is passed through the steam cross-linking pipeline with a pressure of 0.8-1.2 MPa, continuous cross-linking is carried out for 2-3 minutes, and the silicone rubber and Cables with chlorinated polyethylene rubber sheath.
本发明公开了一种硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，加工时，先将硅橡胶母料和氯化聚乙烯橡胶母料分别通过密炼机混炼成型，再将两种母料一起投入密炼机共混，共混后添加硫化剂，使硅橡胶母料和氯化聚乙烯橡胶母料能够充分混合，但两种橡胶从化学上分析没有发生化学反应，而是以一种相互交叉结合的物理混合形式共存，共存后相互不排斥、不分层，各自保留自己的性能和特点，且所有性能介于两种橡胶性能之间，但在实际生产中，随着硅橡胶和氯化聚乙烯橡胶的比例不同，其综合性能也不同。本方案与已有技术相比，成型后的电缆外皮性能介于两种橡胶之间，相互补充，解决了硅橡胶撕裂强度差的弱点，也提高了氯化聚乙烯橡胶的耐热程度，确保电缆的安全使用。The invention discloses a cable sheath processing method for blending silicone rubber and chlorinated polyethylene rubber. During processing, firstly, the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch are kneaded and formed by an internal mixer respectively, and then the The two masterbatches were blended together in an internal mixer, and a vulcanizing agent was added after blending, so that the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch could be fully mixed, but the two rubbers did not undergo chemical reactions from chemical analysis. It coexists in a physical mixed form of cross-combination. After coexistence, it does not exclude each other and does not layer. Each retains its own performance and characteristics, and all properties are between the properties of the two rubbers. The proportion of silicone rubber and chlorinated polyethylene rubber is different, and the comprehensive properties are also different. Compared with the existing technology, the performance of the molded cable sheath is between the two types of rubber, complementing each other, solving the weak point of poor tear strength of silicone rubber, and improving the heat resistance of chlorinated polyethylene rubber. Ensure safe use of cables.
本发明的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，所述的硫化剂为过氧化二异丙苯DCP等过氧化物硫化剂。所述的着色剂为炭黑等色粉。所述的增塑剂为偏苯三酸酐TOTM和癸二酸二辛酯DOS等。所 述的稳定剂为氧化镁MgO等。所述硅胶和氯化聚乙烯橡胶的重量比例为20％～80％:80％～20％，最佳重量比例为30％～50％:70％～50％，根据不同的应用场景调整各自的比例。In the cable sheath processing method of blending silicone rubber and chlorinated polyethylene rubber of the present invention, the vulcanizing agent is a peroxide vulcanizing agent such as dicumyl peroxide DCP. The colorant is toner such as carbon black. The plasticizer is trimellitic anhydride TOTM, dioctyl sebacate DOS and the like. Described stabilizing agent is magnesium oxide MgO etc. The weight ratio of the silica gel and the chlorinated polyethylene rubber is 20% to 80%: 80% to 20%, and the optimal weight ratio is 30% to 50%: 70% to 50%, and the respective weight ratios are adjusted according to different application scenarios. Proportion.
具体实施方式Detailed ways
本发明涉及一种硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，包括第一步，取硅橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入硅橡胶原料、白炭黑和硅油等辅料进行混炼，混炼温度85～90℃，共混时间400～500S，共混均匀后得到硅胶母料，取出备用；The invention relates to a method for processing a cable sheath blended with silicone rubber and chlorinated polyethylene rubber. Rubber raw materials, white carbon black and silicone oil and other auxiliary materials are mixed at a mixing temperature of 85-90°C and a blending time of 400-500 seconds. After the blending is uniform, the silica gel masterbatch is obtained and taken out for later use;
第二步，取氯化聚乙烯橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入氯化聚乙烯橡胶原料、滑石粉、白炭黑、增塑剂和稳定剂等辅料进行混炼，混炼温度85～90℃，共混时间500～600S，共混均匀后得到氯化聚乙烯橡胶母料，取出备用；In the second step, take chlorinated polyethylene rubber and auxiliary materials and put them into an internal mixer for mixing. When mixing, put in chlorinated polyethylene rubber raw materials, talcum powder, white carbon black, plasticizer and stabilizer in sequence Mix the auxiliary materials, the mixing temperature is 85-90°C, and the blending time is 500-600S. After the blending is uniform, the chlorinated polyethylene rubber masterbatch is obtained, and it is taken out for later use;
第三步，将硅胶母料和氯化聚乙烯橡胶母料按重量比例一起投入密炼机中进行共混，共混温度85～90℃，共混时间200～300S，共混均匀后取出，放在开炼机上打卷停放至少8小时后，得到硅橡胶和氯化聚乙烯橡胶共混料；The third step is to put the silica gel masterbatch and chlorinated polyethylene rubber masterbatch into the internal mixer according to the weight ratio for blending. The blending temperature is 85-90°C and the blending time is 200-300S. After the blending is uniform, take it out. After being placed on an open mill and being coiled and parked for at least 8 hours, a blend of silicone rubber and chlorinated polyethylene rubber is obtained;
第四步，将停放8小时后的硅橡胶和氯化聚乙烯橡胶共混料投入密炼机中，添加2～4质量份的硫化剂混炼，混炼温度不大于90℃，混炼时间不超过1min，待混炼均匀后下料，再投入开炼机打卷，接着投入到出片机中出片，然后经冷却机冷却至50℃以下后，最后投入叠片机中叠片装框备用；The fourth step is to put the blend of silicone rubber and chlorinated polyethylene rubber after parking for 8 hours into the internal mixer, add 2 to 4 parts by mass of vulcanizing agent and knead, the kneading temperature is not higher than 90 ° C, and the kneading time is No more than 1min, after the mixing is uniform, the material is unloaded, and then put into the open mill for coiling, and then put into the sheet discharge machine to discharge the sheet, and then cooled to below 50°C by the cooler, and finally put into the sheet stacker for stacking. box spare;
第五步，将叠片装框后的硅橡胶和氯化聚乙烯橡胶共混料送入挤橡成型机中，通过挤橡挤压，并在挤压模具的作用下，将硅橡胶和氯化聚乙烯橡胶共混料挤包在线芯外围，定型成电缆，定型后的电缆再穿过施加0.8～1.2MPa压力的蒸汽交联管道，进行2—3分钟连续交联，得到带硅橡胶和氯化聚乙烯橡胶外皮的电缆。The fifth step is to feed the blended silicone rubber and chlorinated polyethylene rubber into the extrusion molding machine after the laminations are framed, and extrude the silicone rubber and chlorine under the action of the extrusion die. The polyethylene rubber blend is extruded and wrapped around the wire core, and shaped into a cable. After the shape is passed through the steam cross-linking pipeline with a pressure of 0.8-1.2 MPa, continuous cross-linking is carried out for 2-3 minutes, and the silicone rubber and Cables with chlorinated polyethylene rubber sheath.
加工时，先将硅橡胶母料和氯化聚乙烯橡胶母料分别通过密炼机混炼成型，再将两种母料一起投入密炼机共混，共混后添加硫化剂，使硅橡胶母料和氯化聚乙烯橡胶母料能够充分混合，然后打卷停放至少8小 时以上，得到硅橡胶和氯化聚乙烯橡胶共混料，再将共混料投入密炼机中，并添加2～4质量份的硫化剂再次混炼，混炼均匀后下料，投入开炼机打卷，接着投入到出片机中出片，然后经冷却机冷却后，最后投入叠片机中叠片装框备用，将叠片装框后的硅橡胶和氯化聚乙烯橡胶共混料送入挤橡成型机中，通过挤橡挤压，将硅橡胶和氯化聚乙烯橡胶共混料挤包在线芯外围，定型成电缆，最后进行交联，得到带硅橡胶和氯化聚乙烯橡胶外皮的电缆。但两种橡胶从化学上分析没有发生化学反应，而是以一种相互交叉结合的物理混合形式共存，共存后相互不排斥、不分层，各自保留自己的性能和特点，且所有性能介于两种橡胶性能之间，随着硅橡胶和氯化聚乙烯橡胶的比例不同，其综合性能也不同。本方案与已有技术相比，成型后的电缆外皮性能介于两种橡胶之间，相互补充，解决了硅橡胶撕裂强度差的弱点，也提高了氯化聚乙烯橡胶的耐热程度，确保电缆的安全使用。所述的硫化剂为过氧化二异丙苯DCP等过氧化物硫化剂。所述的着色剂为炭黑等色粉。所述的增塑剂为偏苯三酸酐TOTM和癸二酸二辛酯DOS等。所述的稳定剂为氧化镁MgO等。所述硅胶和氯化聚乙烯橡胶的重量比例为20％～80％:80％～20％，最佳重量比例为30％～50％:70％～50％，根据不同的应用场景调整各自的比例。During processing, the silicone rubber masterbatch and the chlorinated polyethylene rubber masterbatch are first mixed and formed through an internal mixer, and then the two masterbatches are put into the internal mixer for blending, and after blending, a vulcanizing agent is added to make the silicone rubber The masterbatch and chlorinated polyethylene rubber masterbatch can be fully mixed, and then coiled and parked for at least 8 hours to obtain a blend of silicone rubber and chlorinated polyethylene rubber, then put the blend into the internal mixer, and add 2 ~4 parts by mass of vulcanizing agent is kneaded again, after kneading evenly, the material is cut, put into the open mill for coiling, and then put into the sheet discharging machine to discharge the sheet, then cooled by the cooling machine, and finally put into the stacking machine for stacking Framed for standby, the silicone rubber and chlorinated polyethylene rubber blended material after the stacked frame is sent to the rubber extrusion molding machine, and the silicone rubber and chlorinated polyethylene rubber blended material is extruded through rubber extrusion The periphery of the wire core is shaped into a cable, and finally cross-linked to obtain a cable with a silicone rubber and chlorinated polyethylene rubber sheath. However, the two rubbers did not react chemically in chemical analysis, but coexisted in a physical mixing form of mutual cross-combination. After coexistence, they did not exclude each other and did not delaminate. Between the properties of the two rubbers, with the different proportions of silicone rubber and chlorinated polyethylene rubber, the comprehensive properties are also different. Compared with the existing technology, the performance of the molded cable sheath is between the two types of rubber, complementing each other, solving the weak point of poor tear strength of silicone rubber, and improving the heat resistance of chlorinated polyethylene rubber. Ensure safe use of cables. The vulcanizing agent is a peroxide vulcanizing agent such as dicumyl peroxide DCP. The colorant is toner such as carbon black. The plasticizer is trimellitic anhydride TOTM, dioctyl sebacate DOS and the like. The stabilizer is magnesium oxide MgO and the like. The weight ratio of the silica gel and the chlorinated polyethylene rubber is 20% to 80%: 80% to 20%, and the optimal weight ratio is 30% to 50%: 70% to 50%, and the respective weight ratios are adjusted according to different application scenarios. Proportion.
实施例1：配置硅橡胶：氯化聚乙烯橡胶＝30％：70％的共混胶料，按照各自配方的含胶量不同，比如硅胶含胶量70％，CPE橡胶含胶量40％，分别取4.3公斤硅胶原料和17.5公斤的氯化聚乙烯橡胶原料放在开炼机上共混，混合均匀后再添加各自配方的应加入的硫化剂，等硫化剂分散均匀后出片即可待用，硫化工艺可采用模压及蒸汽硫化，硫化条件由胶料配方决定。Embodiment 1: Configure silicone rubber: chlorinated polyethylene rubber = 30%: 70% of the blended rubber material, according to the different rubber content of the respective formulations, such as 70% rubber content of silica gel, 40% rubber content of CPE rubber, Take 4.3 kg of silica gel raw materials and 17.5 kg of chlorinated polyethylene rubber raw materials and blend them on the open mill. After mixing evenly, add the vulcanizing agent that should be added in the respective formula. After the vulcanizing agent is evenly dispersed, the sheet can be used for use , The vulcanization process can be molded and steam vulcanized, and the vulcanization conditions are determined by the rubber formula.

Claims (6)

  1. 硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于：A method for processing a cable sheath blended with silicone rubber and chlorinated polyethylene rubber, characterized in that:
    第一步，取硅橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入硅橡胶原料、白炭黑和硅油进行混炼，混炼温度85～90℃，共混时间400～500S，共混均匀后得到硅胶母料，取出备用；The first step is to take the silicone rubber and auxiliary materials and put them into the internal mixer for mixing. When mixing, put in the silicone rubber raw materials, white carbon black and silicone oil in the order of the front and back for mixing. The mixing temperature is 85-90°C, The time is 400-500S, and the silica gel masterbatch is obtained after blending evenly, and it is taken out for later use;
    第二步，取氯化聚乙烯橡胶及辅料放入密炼机中混炼，混炼时，依前后顺序分别投入氯化聚乙烯橡胶原料、滑石粉、白炭黑、增塑剂和稳定剂进行混炼，混炼温度85～90℃，共混时间500～600S，共混均匀后得到氯化聚乙烯橡胶母料，取出备用；In the second step, take chlorinated polyethylene rubber and auxiliary materials and put them into an internal mixer for mixing. When mixing, put in chlorinated polyethylene rubber raw materials, talcum powder, white carbon black, plasticizer and stabilizer in sequence Carry out kneading, the kneading temperature is 85 ~ 90 ℃, the blending time is 500 ~ 600S, after the blending is uniform, the chlorinated polyethylene rubber masterbatch is obtained, and it is taken out for use;
    第三步，将硅胶母料和氯化聚乙烯橡胶母料按重量比例一起投入密炼机中进行共混，共混温度85～90℃，共混时间200～300S，共混均匀后取出，放在开炼机上打卷停放至少8小时后，得到硅橡胶和氯化聚乙烯橡胶共混料；The third step is to put the silica gel masterbatch and chlorinated polyethylene rubber masterbatch into the internal mixer according to the weight ratio for blending. The blending temperature is 85-90°C and the blending time is 200-300S. After the blending is uniform, take it out. After being placed on an open mill and being coiled and parked for at least 8 hours, a blend of silicone rubber and chlorinated polyethylene rubber is obtained;
    第四步，将停放8小时后的硅橡胶和氯化聚乙烯橡胶共混料投入密炼机中，添加2～4质量份的硫化剂混炼，混炼温度不大于90℃，混炼时间不超过1min，待混炼均匀后下料，再投入开炼机打卷，接着投入到出片机中出片，然后经冷却机冷却至50℃以下后，最后投入叠片机中叠片装框备用；The fourth step is to put the blend of silicone rubber and chlorinated polyethylene rubber after parking for 8 hours into the internal mixer, add 2 to 4 parts by mass of vulcanizing agent and knead, the kneading temperature is not higher than 90 ° C, and the kneading time is No more than 1min, after the mixing is uniform, the material is unloaded, and then put into the open mill for coiling, and then put into the sheet discharge machine to discharge the sheet, and then cooled to below 50°C by the cooler, and finally put into the sheet stacker for stacking. box spare;
    第五步，将叠片装框后的硅橡胶和氯化聚乙烯橡胶共混料送入挤橡成型机中，通过挤橡挤压，并在挤压模具的作用下，将硅橡胶和氯化聚乙烯橡胶共混料挤包在线芯外围，定型成电缆，定型后的电缆再穿过施加0.8～1.2MPa压力的蒸汽交联管道，进行2—3分钟连续交联，得到带硅橡胶和氯化聚乙烯橡胶外皮的电缆。The fifth step is to feed the blended silicone rubber and chlorinated polyethylene rubber into the extrusion molding machine after the laminations are framed, and extrude the silicone rubber and chlorine under the action of the extrusion die. The polyethylene rubber blend is extruded and wrapped around the wire core, and shaped into a cable. After the shape is passed through the steam cross-linking pipeline with a pressure of 0.8-1.2 MPa, continuous cross-linking is carried out for 2-3 minutes, and the silicone rubber and Cables with chlorinated polyethylene rubber sheath.
  2. 如权利要求1所述的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于所述的硫化剂为过氧化二异丙苯DCP。The cable sheath processing method of silicone rubber and chlorinated polyethylene rubber blending as claimed in claim 1, characterized in that said vulcanizing agent is dicumyl peroxide DCP.
  3. 如权利要求1所述的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于所述的着色剂为炭黑。The cable sheath processing method of blending silicone rubber and chlorinated polyethylene rubber according to claim 1, characterized in that said coloring agent is carbon black.
  4. 如权利要求1所述的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于所述的增塑剂为偏苯三酸酐TOTM和癸二酸二辛酯DOS。The cable sheath processing method of silicone rubber and chlorinated polyethylene rubber blending as claimed in claim 1, characterized in that said plasticizer is trimellitic anhydride TOTM and dioctyl sebacate DOS.
  5. 如权利要求1所述的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于所述的稳定剂为氧化镁MgO。The cable sheath processing method of silicone rubber and chlorinated polyethylene rubber blending as claimed in claim 1, characterized in that said stabilizer is magnesium oxide MgO.
  6. 如权利要求1所述的硅橡胶和氯化聚乙烯橡胶共混的电缆外皮加工方法，其特征在于所述硅胶和氯化聚乙烯橡胶的重量比例为20％～80％:80％～20％，最佳重量比例为30％～50％:70％～50％。The cable sheath processing method of blending silicone rubber and chlorinated polyethylene rubber according to claim 1, characterized in that the weight ratio of the silica gel and chlorinated polyethylene rubber is 20% to 80%: 80% to 20% , the optimal weight ratio is 30% to 50%:70% to 50%.
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