WO2020251225A1 - Composition de résine pour isolation externe de câble aérien, câble aérien comprenant une isolation externe de câble aérien fabriquée à partir de celle-ci, et son procédé de fabrication - Google Patents

Composition de résine pour isolation externe de câble aérien, câble aérien comprenant une isolation externe de câble aérien fabriquée à partir de celle-ci, et son procédé de fabrication Download PDF

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WO2020251225A1
WO2020251225A1 PCT/KR2020/007381 KR2020007381W WO2020251225A1 WO 2020251225 A1 WO2020251225 A1 WO 2020251225A1 KR 2020007381 W KR2020007381 W KR 2020007381W WO 2020251225 A1 WO2020251225 A1 WO 2020251225A1
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resin composition
external insulation
processed cable
cable
processed
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PCT/KR2020/007381
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Korean (ko)
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고창모
이재훈
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엘에스전선 주식회사
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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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/14—Peroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • 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
    • C08K5/00—Use of organic ingredients
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025—Crosslinking or vulcanising agents; including accelerators
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
    • C08F2500/12—Melt flow index or melt flow ratio
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
    • C08F2500/18—Bulk density

Definitions

  • the present invention relates to a resin composition for external insulation of a processed cable, a processed cable including external insulation of a processed cable manufactured therefrom, and a method of manufacturing the same.
  • a typical power cable includes a conductor and an insulating layer surrounding it.
  • Power cables are largely divided into 10 ⁇ 66kV medium voltage (MV class), 66 ⁇ 230kV high voltage (HV class), and 230kV or higher super high voltage (EHV class) depending on the voltage.
  • MV class medium voltage
  • HV class 66 ⁇ 230kV high voltage
  • EHV class super high voltage
  • a cable in general, includes an inner semiconducting layer between the conductor and the insulating layer, an inner insulating layer surrounding the semiconducting layer, and an outer insulating layer surrounding the inner insulating layer.
  • Cables are divided into underground cables buried underground and overhead cables installed in space according to the installation method, and processed cables are installed through supports, for example, electric poles.
  • FIG. 1 is a figure for demonstrating the installation mode of an overhead cable.
  • the overhead cable 100 is supported by adjacent supports 200 to transmit power using a space over a long distance.
  • Fig. 2 shows a cross section of a processed cable for showing the structure of the processed cable.
  • the processed cable includes a conductor 10, a semiconducting layer 20 surrounding the conductor 10, an insulating layer 30 surrounding the semiconducting layer 20, and the insulating insulating layer 30. It is composed of an outer insulating layer 40 containing cross-linked polyethylene (XLPE, cross-linked polyethylene).
  • XLPE cross-linked polyethylene
  • the conventionally used processed cable has been using thermoplastic outer insulation, and the allowable operating temperature is limited to 75°C class.
  • the processed cable uses thermoset outer insulation to improve physical properties such as heat resistance improvement. Therefore, the allowable operating temperature corresponds to 90°C class.
  • the external insulation of conventional overhead cables replaces the conventional low density polyethylene (LDPE) to secure physical properties such as abrasion resistance, track resistance, and crack resistance, and linear low density polyethylene (LLDPE), medium Medium Density Polyethylene (MDPE) or HDPE has been used.
  • LLDPE linear low density polyethylene
  • MDPE medium Medium Density Polyethylene
  • HDPE high Density Polyethylene
  • the reason for the use of the polyethylene for external insulation is to protect cables installed in mountainous areas, and the cables must have excellent wear resistance to avoid being scratched by branches or other obstacles, and must have high hardness to prevent damage from pecking birds.
  • anti-track resistance is required to protect against rain and lightning, and anti-crack resistance to withstand natural exposure to weather.
  • the durability of the cable must be improved above 90°C, and accordingly, the heat resistance must be improved by crosslinking polyethylene.
  • XL-LDPE obtained by crosslinking low-density polyethylene (LDPE) for external insulation has been most widely used as a conventional overhead cable.
  • XL-LDPE has added a large amount of fillers such as flame retardants to improve the track resistance of external insulation, and thus the specific gravity of cables and external insulation compositions increases, abrasion resistance decreases, and other filler content increases. There was a problem of deteriorating physical properties.
  • polyethylene such as LLDPE, MDPE, and HDPE, which has a relatively higher density than LDPE
  • the melting point of polyethylene is increased, and during crosslinking reaction, the reaction proceeds at a high temperature, so that the conventional crosslinking agent occurs due to scorch due to high temperature.
  • the conventional crosslinking agent occurs due to scorch due to high temperature.
  • Patent Document 1 Korean Laid-Open Patent Publication No. 10-2000-0002831
  • the present inventors satisfies the physical properties required in application to external insulation of a processed cable, and can improve physical properties such as heat resistance compared to external insulation of a conventional processed cable, and when applying thermosetting crosslinked polyethylene
  • a processed cable that can prevent scorch defects by using a stable crosslinking agent even in high-temperature extrusion processes and shorten the extrusion process of the semiconducting layer, the inner insulating layer and the outer insulating layer on the conductor, a resin composition for external insulation, and a processed cable manufactured therefrom It is intended to provide an overhead cable including external insulation and a method of manufacturing the same.
  • the present invention provides a resin composition for external insulation of a processed cable comprising a polyethylene (PE) resin and a crosslinking agent having a safety process temperature (t s2 ) of 140° C. or higher in order to solve the aforementioned problems.
  • PE polyethylene
  • t s2 safety process temperature
  • the PE resin is at least one selected from the group consisting of Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), and High Density Polyethylene (HDPE). It provides a resin composition for external insulation of a processed cable, characterized in that it comprises a.
  • LLDPE Linear Low Density Polyethylene
  • MDPE Medium Density Polyethylene
  • HDPE High Density Polyethylene
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the melting point (Tm) of the PE resin is 115°C or higher.
  • the PE resin provides a resin composition for external insulation of a processed cable, characterized in that the density (density) according to ASTM D1248 is greater than 0.910g / cm 3 .
  • the present invention provides a resin composition for external insulation of a processed cable, wherein the PE resin has a melting index (MI) of 25.0 g/10min or less according to ASTM D1248.
  • MI melting index
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the typical crosslink temperature (t 90 ) of the crosslinking agent is 180°C or higher.
  • the present invention provides a resin composition for external insulation of a processed cable, wherein the crosslinking agent has a temperature of 164°C or higher with a half-life of 0.1 hour and a temperature of 118°C or higher with a half-life of 10 hours.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the crosslinking agent includes any one or more of the following compounds of the peroxide series.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the activation energy of the crosslinking agent is 139 kJ/mole or more.
  • the resin composition for external insulation of processed cables comprises 0.8 to 3.4 parts by weight of a crosslinking agent (based on 100% purity) based on 100 parts by weight of PE resin. Provides.
  • the resin composition for external insulation of the processed cable carbon black 0.01 to 0.05 parts by weight, TiO 2 0.1 to 2.0 parts by weight, antioxidant 0.1 to 1.0 parts by weight, UV additive 0.2 to 1.0 parts by weight and flame retardant 8 It provides a resin composition for external insulation of a processed cable, characterized in that it further comprises any one or more selected from the group consisting of parts by weight or less.
  • the present invention provides a resin composition for external insulation of a processed cable, wherein the total content of carbon black, TiO 2 , antioxidants, UV additives and other additives is less than 10% based on the total weight of the resin composition.
  • the resin composition excluding the crosslinking agent provides a resin composition for external insulation of a processed cable, characterized in that the density (density) according to ASTM D1248 is greater than 0.910g / cm 3 .
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition excluding the crosslinking agent has a melting index (MI) of 1.0 g/10min or less according to ASTM D1248.
  • MI melting index
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of the processed cable has a density according to ASTM D1248 of 0.910 g/cm 3 or more.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of a processed cable has a tensile strength of 2800 psi or more and an elongation of 400% or more.
  • the present invention provides a resin composition for external insulation of a processed cable, wherein the resin composition for external insulation of a processed cable has a brittleness temperature according to ASTM D1248 of -75°C or less.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of a processed cable has an environmental stress crack resistance (ESCR) of 48 hours or more according to ASTM D1248.
  • ESCR environmental stress crack resistance
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of a processed cable has a thermal stress crack resistance (TSCR) of 96 hours or more according to ASTM D1248.
  • TSCR thermal stress crack resistance
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of a processed cable has a dielectric factor (dissipation factor) of 0.001 MHz or less according to ASTM D1248.
  • the present invention provides a resin composition for external insulation of a processed cable, wherein the resin composition for external insulation of a processed cable has a dielectric constant of 2.31 MHz or less according to ASTM D1248.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the volume resistivity according to ASTM D1248 is 1.0*10 15 ⁇ cm or more.
  • the resin composition for external insulation of the processed cable passes a hot creep test at 150°C according to ANSI/ICEA S-121-733 and ICEA T-28-562, and hot creep (hot creep) Provides a resin composition for external insulation of a processed cable, characterized in that the elongation is 175% or less.
  • the resin composition for external insulation of the processed cable has a hot set value of 10% or less according to ANSI/ICEA S-121-733 and ICEA T-28-562. It provides a resin composition for external insulation.
  • the resin composition for external insulation of a processed cable characterized in that the track resistance value according to ANSI/ICEA S-121-733 and ASTM D2303 is 1,000 minutes or more. Provides.
  • the resin composition for external insulation of the processed cable is a tensile strength and elongation test measured after performing a sunlight resistance test according to ANSI/ICEA S-121-733. It provides a resin composition for external insulation of a processed cable, characterized in that the performance of 80% or more compared to the total tensile strength and elongation is maintained.
  • the resin composition for external insulation of the processed cable is measured after an accelerated aging test in accordance with ANSI/ICEA S-121-733 and ICEA T-27-581/NEMA WC-53
  • a resin composition for external insulation of a processed cable characterized in that a tensile strength and elongation of 75% or more compared to the tensile strength and elongation before the test are maintained.
  • the present invention provides a resin composition for external insulation of a processed cable, characterized in that the resin composition for external insulation of a processed cable has a color of black, gray, or white.
  • the present invention comprises a conductor, a semiconducting layer formed outside the conductor, an inner insulating layer formed outside the semiconducting layer, and an outer insulating layer made from the resin composition for outer insulation of the cable formed outside the inner insulating layer.
  • a conductor a semiconducting layer formed outside the conductor
  • an inner insulating layer formed outside the semiconducting layer
  • an outer insulating layer made from the resin composition for outer insulation of the cable formed outside the inner insulating layer.
  • the present invention provides a method of manufacturing a processed cable including an extrusion process using the resin composition for external insulation of the cable.
  • the present invention provides a method for manufacturing a processed cable, characterized in that the extrusion process includes simultaneously extruding three layers of a semiconducting layer, an inner insulating layer, and an outer insulating layer on a conductor.
  • the present invention provides a method for manufacturing a processed cable, wherein the extrusion process includes simultaneously extruding two layers of a semiconducting layer and an inner insulating layer on a conductor, and extruding an outer insulating layer. .
  • the resin composition for external insulation of a processed cable according to the present invention can improve physical properties such as heat resistance properties, compared to a processed cable using conventional non-crosslinked PE or crosslinked LDPE (XL-LDPE), including XLPE for external insulation.
  • XL-LDPE crosslinked LDPE
  • XL-LDPE crosslinked LDPE
  • the conventionally widely used 75°C-class processed cable uses non-crosslinked PE for external insulation, and has poor heat resistance.
  • the 90°C-class processed cable replaces the crosslinked LDPE used for external insulation and crosslinked LLDPE, MDPE, HDPE. However, in these cases, it was difficult to apply external insulation due to the occurrence of scorch in the cable.
  • the manufacturing method of the overhead cable according to the present invention is a conductor, a semiconducting layer, an inner insulating layer and an outer insulating layer are sequentially double-extruded, and then the outer insulating layer is extruded or the semiconducting layer, the inner insulating layer and the outer insulating layer are simultaneously Triple extrusion is possible, and by further simplifying the manufacturing process, production efficiency can be increased.
  • 1 is a figure for demonstrating the installation mode of an overhead cable.
  • Fig. 2 shows a cross section of a processed cable for showing the structure of the processed cable.
  • first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components.
  • the present invention relates to a resin composition for external insulation of cables, and more specifically, to a resin composition for external insulation applied to a processed cable.
  • the external insulation resin composition may be used not only for external insulation of a processed cable, but also for a sheath of a cable, but is not limited thereto, and the effect of the resin composition for external insulation of a processed cable of the present invention can be achieved. If it is, it can be transformed into other forms similar to the same kind.
  • the resin composition for external insulation of the processed cable includes a polyethylene (PE) resin and a crosslinking agent having a safety process temperature (t s2 ) of 140°C or higher.
  • PE polyethylene
  • t s2 safety process temperature
  • the PE resin may include any one or more selected from the group consisting of Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), and High Density Polyethylene (HDPE).
  • LLDPE Linear Low Density Polyethylene
  • MDPE Medium Density Polyethylene
  • HDPE High Density Polyethylene
  • the PE resin may be LLDPE, MDPE, HDPE, or a mixture thereof.
  • the outer insulating layer of the processed cable through a crosslinking process using the resin composition for external insulation of the processed cable includes cross-linked polyethylene (XLPE).
  • the crosslinked polyethylene may be one in which LLDPE, MDPE, HDPE and a mixture thereof are crosslinked with each other, and the maximum allowable temperature of the XLPE material is 90°C, and the allowable temperature increases compared to the conventional 75°C class, and the heat resistance properties of the processed cable, It has excellent hot creep and hot set properties. Therefore, it is possible to reduce deterioration in mechanical and electrical properties of the processed cable even at high temperatures.
  • the LLDPE, MDPE, HDPE resin is a 0.910g / cm 3 greater than (TYPE I) a density according to ASTM D1248, preferably 0.925g / cm 3 is greater than (TYPE II), more preferably 0.940g / cm 3 It is exceeding (TYPE III, IV).
  • the LLDPE, MDPE, and HDPE resins have a melting index (MI, melting index) of 25.0 g/10 min or less (CATEGORY 2) according to ASTM D1248, preferably 10.0 g/10 min or less (CATEGORY 3), and more preferably It is less than 1.0g/10min (CATEGORY 4, 5).
  • the LLDPE, MDPE, and HDPE resins have a melting point (Tm) of 115°C or higher, preferably 120°C or higher, and may have a range of about 115 to 180°C. That is, a PE resin having a melting point higher than that of LDPE having a melting point of about 105 to less than 115°C may be used.
  • the safety process temperature of the LLDPE, MDPE, and HDPE resins is around 125°C, but in order for the actual PE resin to be properly processed, it must be about 150°C or more, and preferably about 180°C or more.
  • the LLDPE, MDPE, and HDPE resins since they have high crystallinity, they have high stiffness, are strong against impact, have excellent electrical properties, and have good water resistance.
  • the density is high and the melting point thereof is high, so the process temperature of the crosslinking process of LLDPE, MDPE, and HDPE is 230°C or higher during the crosslinking reaction, and for this reason, the external insulation composition using the conventional LDPE resin
  • the crosslinking agent used in the crosslinking agent has a problem that crosslinking is not possible or scorch defects occur.
  • the crosslinking agent of the present invention has a safety process temperature (t s2 ) of 140°C or higher.
  • the safe processing temperature (t s2 ) is defined as the temperature when the scorch time measured by a rheometer according to ISO 6502 exceeds 20 minutes.
  • the crosslinking agent can minimize scorch even at a high processing temperature of PE as the safety process temperature is 140°C or higher.
  • the crosslinking agent may have a safety process temperature of 180°C or higher.
  • the typical crosslink temperature (t 90 ) of the crosslinking agent is 180°C or higher, preferably 185°C or higher, preferably 220°C or higher.
  • the typical crosslinking temperature means the temperature when the optimal cure reaches within 12 minutes
  • the optimal curing means that the crosslinking agent of the compound has undergone 90% or more crosslinking. That is, typical crosslinking temperature means a temperature that exhibits optimal cure reaching 90% crosslinking within 12 minutes.
  • typical crosslinking temperature of the crosslinking agent is less than 180°C, there is a problem that sufficient crosslinking does not occur or the crosslinking time is increased too much.
  • the crosslinking agent may have a temperature of 164°C or higher with a half-life of 0.1 hour and a temperature of 118°C or higher with a half-life of 10 hours.
  • the crosslinking agent preferably has a temperature of 176°C or higher with a half-life of 0.1 hour and a temperature of 129°C or higher with a half-life of 10 hours, more preferably 180°C or higher with a half-life of 0.1 hour, and 10
  • a temperature having a half-life of time may be 130°C or higher, most preferably a temperature having a half-life of 0.1 hour may be 213°C or higher, and a temperature having a half-life of 10 hours may be 158°C or higher.
  • the half-life of the crosslinking agent gradually decreases. That is, as the temperature increases, the amount of self-decomposition increases, so that it cannot function as a crosslinking agent at high temperatures. Therefore, it is preferable to use a crosslinking agent having a half-life of more than a certain time at high temperature.
  • the cross-linking agent may be a peroxide-based cross-linking agent, and the peroxide-based cross-linking agent has a high high temperature resistance and a safety process temperature is generally high.
  • the crosslinking agent may include one or more of the following compounds.
  • the safe process temperature of the di-t-butyl peroxide is about 145°C, has a half-life of 0.1 hour at about 176°C, has a half-life of 1 hour at about 151°C, and has a half-life of 10 hours at about 129°C. .
  • the safety process temperature of the 2,5-dimethyl-2,5-di(t-butylperoxy)hexain-3 is about 145°C, has a half-life of 0.1 hour at about 180°C, and 1 hour at about 154°C It has a half-life of about 130°C and a half-life of 10 hours.
  • the safe process temperature of the 3,5,5,7,7-pentamethyl-1,2,4-trioxefane is about 170°C, has a half-life of 0.1 hour at about 213°C, and 1 hour at about 184°C It has a half-life of 10 hours at about 158°C.
  • the activation energy of the crosslinking agent may be 139 kJ/mole or more.
  • the activation energy is the minimum energy required to cause a crosslinking reaction, and may have a tendency proportional to a temperature at which the crosslinking reaction occurs.
  • the resin composition for external insulation of the processed cable may contain 0.8 to 3.4 parts by weight of a crosslinking agent (based on 100% purity) based on 100 parts by weight of the PE resin.
  • the form of the crosslinking agent provided may vary, and the amount of the crosslinking agent added when the crosslinking agent is provided in a liquid form and when the crosslinking agent is provided in a solid form is different from each other.
  • the content of the added crosslinking agent may vary depending on the purity of the crosslinking agent provided.
  • the crosslinking agent when the crosslinking agent is mixed in a ratio of less than the lower limit of the content based on 100 parts by weight of the PE resin, the content of the crosslinking agent is small compared to the PE resin, so sufficient crosslinking cannot be obtained, so it is difficult to secure the desired rigidity and heat resistance.
  • the properties may be deteriorated, and when the crosslinking agent is mixed in a content ratio that exceeds the upper limit of the content, the content of the crosslinking agent is excessive and the content of the crosslinking by-product increases due to the crosslinking reaction, which may cause scorch defects. Early crosslinking may occur, and thus mechanical properties and heat resistance of the outer insulating layer may be deteriorated.
  • the resin composition for external insulation of the processed cable may further include a crosslinking auxiliary, and the crosslinking auxiliary may include triallyisocyanurate, triallycyanurate, trimethylolpropane tri One or more may be selected from methacrylate (trimethylolpropane trimethacrylate), trimethylolpropane triacrylate (trimethylolporpane triacrylate), and the like.
  • the crosslinking aid may decrease the content of the crosslinking agent by increasing the activity of the crosslinking agent to increase the degree of crosslinking.
  • the content of the crosslinking aid may be 2 to 6 parts by weight based on 100 parts by weight of the PE resin.
  • the resin composition for external insulation of the processed cable may further include any one or more selected from the group consisting of carbon black, TiO 2 , antioxidants, UV additives, and flame retardants in addition to PE resin and crosslinking agent.
  • the resin composition for external insulation of the processed cable carbon black 0.01 to 0.05 parts by weight, TiO 2 0.1 to 2.0 parts by weight, antioxidant 0.1 to 1.0 parts by weight, UV additive 0.2 to 1.0 parts by weight, and flame retardant 8 parts by weight Any one or more selected from the group consisting of the following may be further included.
  • the resin composition for external insulation of the processed cable may satisfy the total content of carbon black, TiO 2 , antioxidants, UV additives, and other additives, that is, less than 10% of the total weight of the resin composition. Accordingly, it is possible to satisfy the unfilled standard required for the external insulating resin composition of the processed cable.
  • the sum of the filler components in the external insulating resin composition of the processed cable is 10% or more, it is a filled cross-linked polyethylene covering, and the sum of the filler components is less than 10%.
  • the case is an unfilled cross-linked polyethylene covering.
  • the resin composition for external insulation of the processed cable may further include 0.01 to 0.05 parts by weight of carbon black and 0.1 to 2.0 parts by weight of TiO 2 as an additive for adjusting the color of the processed cable.
  • the carbon black may impart a color to the resin composition for external insulation of a processed cable, and may serve to improve weather resistance of polymers included in the mixed resin.
  • the carbon black is not particularly limited, and all conventional carbon blacks such as furnace black, acetylene black, and thermal black may be used, and those having a particle size of about 10 nm to 30 nm and a surface area of 100 to 200 m 2 /g are used. It is preferable because it is excellent in improving the decomposition resistance of the polymers included in the mixed resin.
  • the content of the carbon black included is not particularly limited, but may be included in an amount of 0.01 to 0.05 parts by weight based on 100 parts by weight of the PE resin.
  • the TiO 2 is widely used as a white pigment, and the content of TiO 2 is not particularly limited, but may be included in an amount of 0.1 to 2.0 parts by weight based on 100 parts by weight of the PE resin.
  • the resin composition for external insulation of the processed cable may further include 0.1 to 1.0 parts by weight of an antioxidant to improve heat resistance and flame retardancy of the processed cable.
  • an antioxidant to improve heat resistance and flame retardancy of the processed cable.
  • it may contain antioxidants such as phenolic and amine-based.
  • the resin composition for external insulation of the processed cable may further include 0.2 to 1.0 parts by weight of a UV additive in order to improve UV resistance.
  • the resin composition for external insulation of the processed cable may further contain 8 parts by weight or less of a flame retardant.
  • the PE resin is LLDPE, it may further contain 8 parts by weight or less of a flame retardant to impart flame retardancy, and preferably 6 to 7 parts by weight.
  • the content of the flame retardant is added in an amount exceeding 8 parts by weight, the improvement in flame retardancy compared to the increase in content is insignificant, and the total content of the filler component exceeds 10% and does not correspond to the unfield crosslinked polyethylene covering, and the content of the filler is excessive. It may be the cause of deterioration of physical properties.
  • the resin composition for external insulation of a processed cable according to the present invention may further include other additives if necessary in addition to the above-described resin composition components.
  • lubricants such as nanoclay, high molecular weight wax, low molecular weight wax, polyolefin wax, paraffin wax, paraffin oil, stearic acid, metal soap, organic silicone, fatty acid ester, fatty acid amide, fatty alcohol, fatty acid, etc., reinforcing agents, and release agents , A stabilizer, a pigment, a dye, a colorant, an antistatic agent, a foaming agent, and may be any one or more selected from the group consisting of a metal deactivator.
  • the content is not particularly limited, but may be included in a range of about 0.01 parts by weight to 10 parts by weight based on 100 parts by weight of the PE resin.
  • a density (density) is 0.910g / cm 3 greater than (TYPE I) and, preferably 0.925g / cm 3 greater than (TYPE II) according to the resin composition excluding the crosslinking agent to ASTM D1248, and more preferably from 0.940g / It may be more than cm 3 (TYPE III, IV).
  • the resin composition for the outer insulating cable processing is a density (density) is 0.910g / cm 3 greater than (TYPE I) according to ASTM D1248, is preferably 0.925g / cm 3 greater than (TYPE II), more preferably For example, it may be greater than 0.940 g/cm 3 (TYPE III, IV).
  • the resin composition excluding the crosslinking agent may have a melting index (MI, melting index) of 1.0 g/10 min or less (CATEGORY 4, 5) according to ASTM D1248, and preferably 0.4 g/10 min or less (CATEGORY 5). .
  • MI melting index
  • the melt index (MI) is difficult to measure because crosslinking begins after the crosslinking agent is mixed. Accordingly, it can be evaluated by measuring the melt index of a resin composition containing PE resin and other fillers, which are the remaining components excluding the crosslinking agent.
  • LDPE low-density polyethylene
  • MDPE MDPE
  • HDPE high density polyethylene
  • MI melt index
  • the density of the composition is low due to the low molecular weight, and there have been many attempts to increase the density by increasing the content of other fillers.
  • the content of the fillers increases, it corresponds to a filled cross-linked polyethylene covering including at least 10% of the total weight of the composition.
  • a field crosslinked polyethylene covering due to a high content of the filler there is a problem in that the physical properties of the cable are deteriorated, and in particular, the hot creep and hot set characteristics are deteriorated.
  • the resin composition for external insulation of the processed cable may have a tensile strength of 2800 psi or more and an elongation of 400% or more. Accordingly, it corresponds to Grade E8, E9, and J4 of ASTM D1248.
  • the resin composition for external insulation of the processed cable has a brittleness temperature of -75°C or less according to ASTM D1248.
  • the resin composition for external insulation of the processed cable has an environmental stress crack resistance (ESCR) of 48 hours or more according to ASTM D1248.
  • ESCR environmental stress crack resistance
  • the resin composition for external insulation of the processed cable has a thermal stress crack resistance (TSCR) of 96 hours or more according to ASTM D1248.
  • TSCR thermal stress crack resistance
  • the resin composition for external insulation of the processed cable has a dielectric factor (dissipation factor) of 0.001 MHz or less according to ASTM D1248.
  • the resin composition for external insulation of the processed cable has a dielectric constant of 2.31 MHz or less according to ASTM D1248.
  • the resin composition for external insulation of the processed cable has a volume resistivity of 1.0*10 15 ⁇ cm or more according to ASTM D1248.
  • the resin composition for external insulation of the processed cable passes a hot creep test at 150°C according to ANSI/ICEA S-121-733 and ICEA T-28-562, and has a hot creep elongation. It is 175% or less.
  • the resin composition for external insulation of the processed cable has a hot set value of 10% or less according to ANSI/ICEA S-121-733 and ICEA T-28-562.
  • the resin composition for external insulation of the processed cable has a track resistance value of 1,000 minutes or more according to ANSI/ICEA S-121-733 and ASTM D2303.
  • the resin composition for external insulation of the processed cable is subjected to a sunlight resistance test according to ANSI/ICEA S-121-733, and the tensile strength and elongation measured after the tensile strength and elongation before the test 80% or more of the performance is maintained.
  • the resin composition for external insulation of the processed cable is a tensile strength measured after an accelerated aging test in accordance with ANSI/ICEA S-121-733 and ICEA T-27-581/NEMA WC-53. ) And elongation are maintained over 75% of the tensile strength and elongation before the test.
  • the resin composition for external insulation of the processed cable may have a black or white color. Therefore, it corresponds to Class B and D of ASTM D1248.
  • antioxidants and other additives are included, and in the case of Class D, antioxidants and UV additives are included.
  • the present invention also relates to an overhead cable. It relates to a processed cable comprising an external insulating layer prepared from a resin composition for external insulation of the processed cable.
  • the processed cable according to the present invention includes an outer insulating layer prepared from the resin composition for outer insulating the processed cable, and the same description as described above will be omitted below.
  • the overhead cable may include a conductor, a semiconducting layer, an inner insulating layer, and an outer insulating layer, like a conventional overhead cable. That is, the processed cable includes a conductor, a semiconducting layer formed outside the conductor, an inner insulating layer formed outside the semiconducting layer, and an outer insulating layer made from a resin composition for outer insulation of the processed cable formed outside the inner insulating layer. Include.
  • the processed cable according to the present invention is made of the resin composition for external insulation of the processed cable, and by forming XLPE using the PE of the present invention, heat resistance characteristics, etc., compared to the conventional non-crosslinked type or processed cable including XL-LDPE In addition to improving the physical properties of the PE, it is possible to reduce the scorch defects of the cable when manufacturing the processed cable by using a stable crosslinking agent even in the high temperature process according to the PE application.
  • the conductor may have a composite stranded structure formed by twisting a plurality of metal wires at a constant pitch, and the metal wire may be made of a single metal or at least two metal alloys. That is, the metal wire may be made of a metal selected from copper, aluminum, iron, and nickel, or may be made of an alloy of these metals, but is not particularly limited thereto.
  • ethylene ethyl acrylate (EEA), ethylene butyl acrylate (EBA), or the like is used alone, or a polyolefin resin of a polyolefin copolymer obtained by mixing them, carbon black, antioxidant , A lubricant, a crosslinking agent, and the like may be included, but are not particularly limited thereto.
  • the insulating layer may contain an LDPE resin, an antioxidant, a crosslinking agent, etc., but is not particularly limited thereto.
  • the inner insulating layer may include crosslinked LDPE (XL-LDPE).
  • the external insulating layer includes the resin composition for external insulation of the overhead cable described above.
  • the processed cable the density (density) according to ASTM D1248 and 0.910g / cm 3 greater than (TYPE I), preferably 0.925g / cm 3 is greater than (TYPE II), more preferably 0.940g / cm 3 May be excess.
  • TYPE I density (density) according to ASTM D1248 and 0.910g / cm 3 greater than (TYPE I)
  • TYPE II 0.910g / cm 3
  • the overhead cable may have a tensile strength of 2800 psi or more and an elongation of 400% or more. Accordingly, it corresponds to GRADE E8, E9, and J4 of ASTM D1248 standard.
  • the processed cable may have a black, gray, or white color. Accordingly, it corresponds to CLASS B and D of ASTM D1248.
  • CLASS B an antioxidant and other additives are included
  • CLASS D an antioxidant and a UV additive are included.
  • the present invention also relates to a method of manufacturing the overhead cable. More specifically, the present invention relates to a method of manufacturing a processed cable including an extrusion process using the resin composition for external insulation of the cable.
  • a conductor, a semiconducting layer, an inner insulating layer, and an outer insulating layer must be sequentially extruded.
  • a semiconducting layer is extruded on an aluminum conductor, and an inner insulating layer including XL-LDPE is extruded.
  • an inner insulating layer including XL-LDPE is extruded.
  • the melting point of the polyethylene resin is low, and even if a crosslinking agent with a low safety process temperature is used, scorch defects do not occur, so it is possible to simultaneously extrude three layers with one facility.
  • a polyethylene resin with a high melting point for example, when using a crosslinking agent suitable for LDPE with a low safety process temperature to manufacture an outer insulating layer containing XL-HDPE, the process proceeds to a high temperature depending on the melting point of HDPE.
  • scorch may occur depending on the characteristics of the crosslinking, that is, scorch defects may occur in the outer insulating layer during extrusion.
  • the extrusion process may include simultaneously extruding three layers of a semiconducting layer, an inner insulating layer, and an outer insulating layer on the conductor.
  • the extrusion process may include simultaneously extruding two layers of a semiconducting layer and an inner insulating layer onto a conductor, and extruding an outer insulating layer.
  • it is a process of simultaneously extruding two layers, a semiconducting layer, and an inner insulating layer on a conductor, followed by extruding the outer insulating layer separately once more, and a crosslinking agent having a lower safety process temperature compared to the triple extrusion. It can be applied when extruding the insulating layer by using.
  • the extrusion process of the outer insulating layer including XL-HDPE is performed separately from the semiconducting layer and the inner insulating layer, or the semiconducting layer and the inner insulating layer in order to secure heat resistance, rigidity, etc. It can be extruded at the same time together to simplify the extrusion process, thereby improving efficiency and productivity.
  • the base resin is Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE) and High Density Polyethylene (HDPE) to improve heat resistance. ) Resin was used.
  • LLDPE Linear Low Density Polyethylene
  • MDPE Medium Density Polyethylene
  • HDPE High Density Polyethylene
  • LDPE Low Density Polyethylene
  • a resin composition for external insulation of a processed cable was prepared by mixing HDPE and a crosslinking agent at the content ratios of Tables 1 to 3 below. Thereafter, on the metal conductor of the copper alloy, a semiconducting layer of EEA resin, an inner insulating layer including XL-LDPE, and an outer insulating layer including XL-HDPE were extruded using a triple extruder to prepare a processed cable.
  • Example 1 includes Examples 1.1 to 1.4, and the crosslinking agent used was Di-tert-butyl peroxide (purity 99% liquid), and the content of the crosslinking agent was adjusted.
  • the content units listed in Table 1 are parts by weight.
  • Example 2 includes Examples 2.1 to 2.4, and the crosslinking agent used is 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexyne-3 (purity 85% liquid), and the content of the crosslinking agent is adjusted. I did.
  • the content units listed in Table 2 are parts by weight.
  • Example 3 includes Examples 3.1 to 3.4, and the crosslinking agent used was 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane (purity 95% liquid), and the content of the crosslinking agent was adjusted. I did.
  • the content units listed in Table 3 are parts by weight.
  • HDPE 100 100 100 100 100 100 100 100 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane 0.9 1.5 2.2 3 0.7 3.5
  • Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10
  • TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Density (g/cm 3 ) 0.9533 0.9531 0.9529 0.9525 0.9535 0,9521 MI (g/10min) 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24 0.24
  • a processed cable was manufactured in the same manner as in Preparation Example 1, except that the type of polyethylene resin used in the resin composition for external insulation of the processed cable was not HDPE, but MDPE. MDPE and a crosslinking agent were mixed in the content ratios of Tables 4 to 6, respectively, to prepare a resin composition for external insulation of a processed cable.
  • Example 4 includes Examples 4.1 to 4.4, and the crosslinking agent used was Di-tert-butyl peroxide (purity 99% liquid), and the content of the crosslinking agent was adjusted.
  • the content units listed in Table 4 are parts by weight.
  • Example 4.1 Example 4.2 Example 4.3 Example 4.4 Comparative Example 4.1 Comparative Example 4.2
  • MDPE 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Di-tert-butyl peroxide 0.9 1.5 2.2 3 0.7 3.5 Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10 TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Antioxidant 0.1-1.0 0.1-1.1 0.1-1.2 0.1-1.3 0.1-1.4 0.1-1.5 UV additive 0.2-1.0 0.2-1.1 0.2-1.2 0.2-1.3 0.2-1.4 0.2-1.5
  • Density (g/cm 3 ) 0.9508 0.9491 0.9451 0.9423 0.9513 0.9389 MI (g/10min) 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61
  • Example 5 includes Examples 5.1 to 5.4, and the crosslinking agent used is 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexyne-3 (85% purity liquid), and the content of the crosslinking agent is adjusted. I did.
  • the content units listed in Table 5 are parts by weight.
  • Example 5.1 Example 5.2 Example 5.3 Example 5.4 Comparative Example 5.1 Comparative Example 5.2
  • MDPE 100 100 100 100 100 100 100 100 100 100 100 100 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexyne-3 0.9 1.5 2.2 3 0.7 3.5
  • Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10 TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Density (g/cm 3 ) 0.9538 0.9531 0.9528 0.9516 0.9543 0.9511 MI (g/10min) 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61
  • Example 6 below includes Examples 6.1 to 6.4, and the crosslinking agent used was 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane (purity 95% liquid), and the content of the crosslinking agent was adjusted. I did.
  • the content units listed in Table 6 are parts by weight.
  • MDPE 100 100 100 100 100 100 100 100 100 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane 0.9 1.5 2.2 3 0.7 3.5
  • Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10
  • TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Density (g/cm 3 ) 0.9528 0.9529 0.9520 0.9515 0.9533 0.9511 MI (g/10min) 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61 0.61
  • a processed cable was manufactured in the same manner as in Preparation Example 1, except that the type of polyethylene resin used in the resin composition for external insulation of the processed cable was not HDPE, but LLDPE was used.
  • a resin composition for external insulation of a processed cable was prepared by mixing LLDPE and a crosslinking agent at the content ratios of Tables 7 to 9, respectively.
  • Example 7 includes Examples 7.1 to 7.4, and the crosslinking agent used was Di-tert-butyl peroxide (purity 99% liquid), and the content of the crosslinking agent was adjusted.
  • the content units listed in Table 7 are parts by weight.
  • Example 7.1 Example 7.2 Example 7.3 Example 7.4 Comparative Example 7.1 Comparative Example 7.2
  • LLDPE 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Di-tert-butyl peroxide 0.9 1.5 2.2 3 0.7 3.5 Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10 TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Antioxidant 0.1-1.0 0.1-1.1 0.1-1.2 0.1-1.3 0.1-1.4 0.1-1.5 UV additive 0.2-1.0 0.2-1.1 0.2-1.2 0.2-1.3 0.2-1.4 0.2-1.5
  • Density (g/cm 3 ) 0.9431 0.9425 0.9421 0.941 0.9436 0.9391 MI (g/10min) 0.28 0.28 0.28 0.28 0.28 0.28 70.28 0.28
  • Example 8 below includes Examples 8.1 to 8.4, and the crosslinking agent used is 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexyne-3 (purity 85% liquid), and the content of the crosslinking agent is adjusted. I did.
  • the content units listed in Table 8 are parts by weight.
  • Example 9 includes Examples 9.1 to 9.4, and the crosslinking agent used is 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane (purity 95% liquid), and the content of the crosslinking agent is adjusted. I did.
  • the content units listed in Table 9 are parts by weight.
  • Example 9.1 Example 9.2 Example 9.3 Example 9.4 Comparative Example 9.1 Comparative Example 9.2
  • LLDPE 100 100 100 100 100 100 100 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane 0.9 1.5 2.2 3 0.7 3.5
  • Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10
  • TiO 2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5
  • Antioxidant 0.1-1.0 0.1-1.1 0.1-1.2 0.1-1.3 0.1-1.4 0.1-1.5 UV additive 0.2-1.0 0.2-1.1 0.2-1.2 0.2-1.3 0.2-1.4 0.2-1.5
  • Comparative Examples 10 to 15 of Table 10 were prepared in the same manner as in Example 1.3, Example 4.3, and Example 7.3, but were prepared by different types of crosslinking agents. Comparative Examples 10 and 11 differ from Example 1.3 in the type of crosslinking agent, Comparative Examples 12 and 13 differ in the type of crosslinking agent from Example 4.3, and Comparative Examples 14 and 15 differ in the type of crosslinking agent from Example 7.3.
  • the content units listed in Table 10 are parts by weight.
  • Comparative Example 10 Comparative Example 11 Comparative Example 12 Comparative Example 13 Comparative Example 14 Comparative Example 15 PE resin HDPE100 HDPE100 MDPE100 MDPE100 LLDPE100 LLDPE100 Crosslinking agent 2.5-Dimethyl-2.5-di(tert-butylperoxy)hexane 2.0 Dicumyl peroxide 2.0 2.5-Dimethyl-2.5-di(tert-butylperoxy)hexane 2.0 Dicumyl peroxide 2.0 Carbon black 0.01-0.05 0.01-0.06 0.01-0.07 0.01-0.08 0.01-0.09 0.01-0.10 TiO2 0.1-2.0 0.1-2.1 0.1-2.2 0.1-2.3 0.1-2.4 0.1-2.5 Antioxidant 0.1-1.0 0.1-1.1 0.1-1.2 0.1-1.3 0.1-1.4 0.1-1.5 UV additive 0.2-1.0 0.2-1.1 0.2-1.2 0.2-1.3 0.2-
  • Comparative Example 16 of Table 11 was prepared in the same manner as in Example 1.3, except that LDPE was used as the PE resin, and Comparative Example 17 used a resin having a safety process temperature of 140°C or higher for the LDPE resin.
  • the content units listed in Table 11 are parts by weight.
  • Comparative Example 16 Comparative Example 17 PE resin LDPE 100 LDPE 100 Crosslinking agent 2.5-Dimethyl-2.5-di(tert-butylperoxy)hexane 2. 3,3,5,7,7-Pentamethyl-1,2,4-trioxepane 2.0 Carbon black 0.01-0.09 0.01-0.10 TiO2 0.1-2.4 0.1-2.5 Antioxidant 0.1-1.4 0.1-1.5 UV additive 0.2-1.4 0.2-1.5 Density (g/cm 3 ) 0.9455 0.9461 MI (g/10min) 0.3 0.3 0.3
  • the density of the external insulating composition according to each of the Examples and Comparative Examples was measured according to ASTM 1284.
  • the color of the external insulating composition according to each of the Examples and Comparative Examples was measured according to ASTM 1284.
  • the safety process temperature of the crosslinking agent is measured by a rheometer according to ISO 6502, and is defined as the temperature when the scorch time exceeds 20 minutes. Scorch means that an uncrosslinked part has occurred during the crosslinking process.
  • the typical crosslinking temperature of the crosslinking agent is measured with a rheometer according to ISO 6502 and is defined as the temperature representing the optimum cure reaching 90% crosslinking within 12 minutes.
  • the half-life of the crosslinking agent refers to the time it takes for the number of moles of the crosslinking agent to decompose at a specific temperature to be half of the initial number of moles.
  • the half-life was measured by DSC-TAM (differential scanning calorimetry-themal activity monitoring) through a solution in which each crosslinking agent was diluted in monochlorobenzene.
  • the half-life of each crosslinking agent was measured according to Equations 1 and 2 below.
  • k d is the crosslinking agent decomposition rate constant
  • A is the Arrhenius frequency factor
  • Ea is the activation energy (J/mol.K)
  • R is 8.3142J/mole.K
  • T is Is the absolute temperature.
  • Hot creep and hot set characteristics were measured according to ANSI/ICEA S-121-733 and ICEA T-28-562 for the external insulation specimens of cables manufactured according to Examples and Comparative Examples.
  • Example 1.1 Example 1.2 Example 1.3 Example 1.4 Comparative Example 1.1 Comparative Example 1.2 color grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey
  • Example 4.1 Example 4.2 Example 4.3 Example 4.4 Comparative Example 4.1 Comparative Example 4.2 color grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey Tensile strength (psi) 2,991 3,150 3,215 3,359 2,718 3,881 Elongation (%) 614.66 550.58 497.56 429.81 658.53 394.25 Safe process temperature (°C) 145 Typical crosslinking temperature (°C) 180 Half-life_10h(°C) 129 Half-life_0.1h(°C) 176 Brittle temperature (°C) ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 Environmental stress cracking (ESCR)(h) >48 >48 >48 >48 >48 >48 >48 >48
  • Example 5.1 Example 5.2 Example 5.3 Example 5.4 Comparative Example 5.1 Comparative Example 5.2 color grey grey grey grey grey grey grey grey grey grey grey grey grey grey
  • Example 7.1 Example 7.2 Example 7.3 Example 7.4 Comparative Example 7.1 Comparative Example 7.2 color grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey
  • Example 9.1 Example 9.2 Example 9.3 Example 9.4 Comparative Example 9.1 Comparative Example 9.2 color grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey grey Tensile strength (psi) 2,710 2,827 3,152 3,315 2,558 3,495 Elongation (%) 620.85 570.55 498.81 415.68 700.52 385.58 Safe process temperature (°C) 180 Typical crosslinking temperature (°C) 220 Half-life_10h(°C) 158 Half-life_0.1h(°C) 213 Brittle temperature (°C) ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 ⁇ -75 Environmental stress cracking (ESCR)(h) >48 >48 >48 >48 >48 >48 >48 >48
  • Example 1 (Example 1.1 to Example 1.4), Example 2 (Example 2.1 to Example 2.4), Example 3 (Example 3.1 to Example 3.4), Example 4 (Example 4.1 to Example 4.4), Example 5 (Example 5.1 to Example 5.4), Example 6 (Example 6.1 to Example 6.4), Example 7 (Example 7.1 to Example 7.4), Example 8 (Example 8.1 to In the case of Example 8.4) and Example 9 (Examples 9.1 to 9.4), the density value measured from each specimen was greater than 0.940 g/cm 3 to 0.960 or less, the color was gray, and the tensile strength was It is more than 2,500psi and elongation is more than 400%, so it is suitable for ANSI/ICEA S-121-733 standard.
  • the content of the crosslinking agent is the content of the present invention.
  • the tensile strength and elongation are deteriorated, and in particular, when the crosslinking agent is less than the content range, the hot set property is deteriorated, and when it is exceeded, the elongation rate is lowered.
  • the resin composition for external insulation of processed cables of the present invention prepares the external insulation layer of processed cables by mixing LLDPE, MDPE, and HDPE resins with a crosslinking agent having a high safety process temperature, it is possible to prevent scorch defects and have excellent rigidity. Physical properties can be obtained.

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Abstract

La présente invention concerne une composition de résine pour une isolation externe de câble aérien, un câble aérien comprenant une isolation externe de câble aérien fabriquée à partir de celle-ci, et son procédé de fabrication. La composition de résine pour une isolation externe de câble aérien selon la présente invention comprend un résine de polyéthylène (PE) et un agent de réticulation ayant une température de traitement sûre (ts2) supérieure ou égale à 140 °C.
PCT/KR2020/007381 2019-06-13 2020-06-08 Composition de résine pour isolation externe de câble aérien, câble aérien comprenant une isolation externe de câble aérien fabriquée à partir de celle-ci, et son procédé de fabrication WO2020251225A1 (fr)

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KR1020190069716A KR20200143540A (ko) 2019-06-13 2019-06-13 가공 케이블 외절연용 수지 조성물, 이로부터 제조된 가공 케이블 외절연을 포함하는 가공 케이블 및 이의 제조 방법

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KR102638272B1 (ko) 2021-11-17 2024-02-20 에이치디씨현대이피 주식회사 전력 케이블 피복재용 친환경 고분자 복합조성물

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1377698A (en) * 1972-01-28 1974-12-18 Siemens Ag Insulated electric conductors
US4770902A (en) * 1983-05-23 1988-09-13 National Distillers And Chemical Corporation Method for covering an electrical conducting means
KR200253560Y1 (ko) * 2001-07-30 2001-11-22 일진전기공업 주식회사 트래킹억제용 수밀형 가공배전선
KR20110020126A (ko) * 2009-08-21 2011-03-02 에스케이이노베이션 주식회사 전력케이블 절연층용 가교 폴리에틸렌 조성물
KR20130089217A (ko) * 2013-06-04 2013-08-09 한국전력공사 절연전선
CN107871556A (zh) * 2016-09-23 2018-04-03 江苏亨通电力电缆有限公司 高载流量的架空绝缘电缆及其制造工艺

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100286531B1 (ko) 1998-06-23 2001-04-16 권문구 고압 내열 배전 가공선

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1377698A (en) * 1972-01-28 1974-12-18 Siemens Ag Insulated electric conductors
US4770902A (en) * 1983-05-23 1988-09-13 National Distillers And Chemical Corporation Method for covering an electrical conducting means
KR200253560Y1 (ko) * 2001-07-30 2001-11-22 일진전기공업 주식회사 트래킹억제용 수밀형 가공배전선
KR20110020126A (ko) * 2009-08-21 2011-03-02 에스케이이노베이션 주식회사 전력케이블 절연층용 가교 폴리에틸렌 조성물
KR20130089217A (ko) * 2013-06-04 2013-08-09 한국전력공사 절연전선
CN107871556A (zh) * 2016-09-23 2018-04-03 江苏亨通电力电缆有限公司 高载流量的架空绝缘电缆及其制造工艺

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