WO2011093211A1 - 架橋ポリオレフィン組成物、直流電力ケーブル及び直流電力線路の施工方法 - Google Patents

架橋ポリオレフィン組成物、直流電力ケーブル及び直流電力線路の施工方法 Download PDF

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WO2011093211A1
WO2011093211A1 PCT/JP2011/051046 JP2011051046W WO2011093211A1 WO 2011093211 A1 WO2011093211 A1 WO 2011093211A1 JP 2011051046 W JP2011051046 W JP 2011051046W WO 2011093211 A1 WO2011093211 A1 WO 2011093211A1
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power cable
mass
cable
parts
current power
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PCT/JP2011/051046
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English (en)
French (fr)
Japanese (ja)
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櫻井　貴裕
田中　俊哉
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株式会社ビスキャス
株式会社フジクラ
古河電気工業株式会社
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Priority to KR1020127019721A priority Critical patent/KR101454092B1/ko
Priority to CN201180007567.6A priority patent/CN102725344B/zh
Priority to JP2011551826A priority patent/JPWO2011093211A1/ja
Publication of WO2011093211A1 publication Critical patent/WO2011093211A1/ja
Priority to HK13103782.1A priority patent/HK1176371A1/zh

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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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477—Six-membered rings
    • C08K5/3492—Triazines
    • C08K5/34924—Triazines containing cyanurate groups; Tautomers thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/26—Attaching the wing or tail units or stabilising surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/18—Spars; Ribs; Stringers
    • B64C3/187—Ribs
    • 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
    • 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
    • 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
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/148—Selection of the insulating material therefor
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
    • H02G15/188—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress connected to a cable shield only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/196—Cable junctions protected by sleeves, e.g. for communication cable having lapped insulation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/005—Additives being defined by their particle size in general
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/006—Additives being defined by their surface area
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49622—Vehicular structural member making

Definitions

  • the present invention relates to a crosslinked polyolefin composition, a DC power cable having an insulating layer formed of the crosslinked polyolefin composition (herein referred to as "DC power cable” in the present application), and a method of applying a DC power line using a DC power cable.
  • An extruded insulated cable (hereinafter referred to as an XLPE cable), in which an insulating layer is formed using a composition of cross-linked polyethylene (XLPE), is generally used as an AC power cable (referred to as "AC power cable” in the present application).
  • AC power cable AC power cable
  • An oil immersion cable (OF cable, MI cable) is generally used as a high voltage DC power cable of 22 V or more.
  • DCP dicumyl peroxide
  • Patent Document 1 describes that, in an XLPE-based cable, the direct current characteristics are improved by blending a certain type of carbon black with the composition of the XLPE-based material that forms the insulating layer.
  • patent document 2 describes that triallyl isocyanurate is mix
  • Patent Document 3 discloses that, in a direct current power cable, a resin composition obtained by blending triallyl isocyanurate and a diene polymer with polyolefin is crosslinked to form an insulator layer, and a certain amount of organic peroxide crosslinking agent is used. It is described that formation of space charge due to a crosslinking agent decomposition residue is suppressed by blending triallyl isocyanurate and a diene-based polymer while suppressing the following.
  • the inventors evaluated the electrical characteristics of the DC power cable in which the insulating layer was formed by the composition of XLPE type which blended carbon black. As a result, it has been found that sufficient electrical characteristics can not always be obtained after adding a thermal history for a fixed time. For example, the DC breakdown characteristics evaluated after heating at 160 ° C. for 10 hours or more decreased to nearly 70% of the characteristics before heating.
  • connection portion and the end portion of XLPE cables In the case of mold jointing the connection portion and the end portion of XLPE cables, when the semiconductive layer and the insulating layer covering the connection portion and the end portion of the cable are heat-molded, the high temperature heat as described above History is added. For this reason, in the XLPE cable in which the direct current electrical characteristics are deteriorated after the heat history is added, the performance in the vicinity of the connection portion and the end portion is affected, which is disadvantageous for direct current power transport.
  • An object of the present invention is to improve the insulating material for a DC power cable disclosed in Patent Document 1 (Japanese Patent No. 3602297), and to suppress the deterioration of DC electrical characteristics due to heat history. It is to provide. That is, to provide a DC power cable of XLPE type that can be used for higher voltage power transportation.
  • the crosslinked polyolefin composition according to the present invention is a crosslinked polyolefin composition in which an organic peroxide crosslinking agent is blended with a polyolefin, and further, (1) per 100 parts by mass of polyolefin, (2) 0.1 to 5 parts by mass of carbon black and (3) 0.02 to 2 parts by mass of at least one compound selected from triallyl isocyanurate or trimethallyl isocyanurate Do.
  • the direct current power cable according to the present invention is characterized in that an insulating layer is formed of the crosslinked polyolefin composition.
  • the insulating layer is formed by covering the portion to which the DC power cable is connected with an insulating material and performing a heating process.
  • the crosslinked polyolefin composition according to the present invention comprises (1) 0.1 to 5 parts by mass of (2) carbon black with respect to 100 parts by mass of polyolefin, and (3) triallyl isocyanurate or trime as a crosslinking assistant. It comprises 0.02 to 2 parts by mass of at least one compound selected from taryl isocyanurate, and (4) a predetermined amount of an organic peroxide crosslinking agent.
  • part by mass indicates the mass ratio of each raw material to be blended, and in the following description, indicates the part by mass with respect to 100 parts by mass of polyolefin.
  • Polyolefins form the basis of the crosslinked polyolefin composition according to the invention.
  • polyolefins include low density polyethylene (LDPE), high density polyethylene (HDPE), ethylene-vinyl acetate copolymer, ethylene ethyl acrylate copolymer, polypropylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer.
  • LDPE low density polyethylene
  • HDPE high density polyethylene
  • ethylene-vinyl acetate copolymer ethylene ethyl acrylate copolymer
  • polypropylene ethylene-propylene copolymer
  • ethylene-propylene-diene copolymer ethylene-propylene-diene copolymer.
  • a polymer, a mixture of two or more of these, and the like can be used.
  • the carbon black is preferably nano-dispersed particles having an average primary particle size of 10 to 100 nm. Such a nano-dispersed particle is to exert a space charge suppressing function.
  • the average primary particle diameter is given by the following equation.
  • Average primary particle size Ni Ni ⁇ Di / Ni Ni
  • the carbon black having a size of 10 to 100 nm of the average primary particle diameter is an optimal value that does not disturb the crystal structure of the insulator such as polyethylene. Disruption of the crystal structure reduces the electrical performance of the insulator. If the particle size is larger than this range, the dispersion and mixing of the carbon black will be poor. If it is smaller than this, manufacture is difficult and unrealistic.
  • the compounding amount of carbon black is preferably 0.1 to 5 parts by mass. If the amount is less than 0.1 parts by mass, the effect of improving the direct current characteristics can not be obtained. On the other hand, if the amount is more than 5 parts by mass, the direct current characteristics deteriorate. If the amount is more than 5 parts by mass, the amount of the filler will be large, and the long extrusion characteristics will be impaired.
  • the proportion of carbon black particles having a particle size of 300 nm or more is preferably 1% by weight or less.
  • the lightning impulse breakdown voltage can be improved by setting the proportion of carbon black particles having a particle size of 300 nm or more to 1% by weight or less.
  • the conductive protrusion is often the origin of the breakdown.
  • the insulating layer of the cable is formed of the crosslinked polyolefin composition according to the present invention
  • the aggregates present in the insulating layer become large, the aggregates are in contact with the inner semiconductive layer and the outer semiconductive layer adjacent to the insulating layer. Or the probability of proximity also increases.
  • Such carbon aggregates in the vicinity of the inner semiconductive layer and in the vicinity of the outer semiconductive layer are considered to affect the impulse breakage of the cable.
  • the carbon black preferably has a ratio of oil absorption (cc / 100 g) of mineral oil to specific surface area (m 2 / g) measured by BET method is 0.7 or more and 3.5 or less.
  • the BET method is one of methods of measuring the surface area of powder by vapor phase adsorption method, and is a method of determining the total surface area of a 1 g sample, that is, the specific surface area, from the adsorption isotherm.
  • nitrogen gas is often used as the adsorption gas, and the method of measuring the adsorption amount from the change in pressure or volume of the gas to be adsorbed is most frequently used.
  • the most prominent ones representing the isotherm of multimolecular adsorption are the Brunauer, Emmett, Teller equations, called the BET equation.
  • the BET equation is widely used for surface area determination. The amount of adsorption is determined based on the BET equation, and the surface area is obtained by multiplying the area occupied by one adsorbed molecule on the surface.
  • the resistivity (specific resistance) of the crosslinked polyethylene composition is ⁇ ( ⁇ ⁇ m)
  • the temperature coefficient of insulation resistance is ⁇ (1 / ° C.)
  • the electric field coefficient stress coefficient of insulation resistance
  • E kv / mm
  • the temperature coefficient ⁇ decreases while the electric field coefficient ⁇ increases, and the leakage of space charge in the insulator composition is promoted.
  • the reason is that when the electric field coefficient ⁇ is increased, the resistivity ⁇ is decreased, so that the electric field in the high stress portion (the portion to which the strong electric field is applied) is relaxed.
  • the temperature coefficient ⁇ decreases, the maximum electric field Emax appearing on the shielding side decreases when the conductor temperature is high.
  • the electric field distribution in the insulator composition moves in the direction of homogenization, and the space charge accumulation is reduced.
  • this ratio is larger than 3.5, the degree of aggregation of the particles is increased, the apparent (aggregate) particle diameter is increased, and the condition of mixing with a thermoplastic resin such as polyethylene becomes worse.
  • acetylene carbon in particular, this effect is significant because the particles are linked in a chain.
  • the carbon black of SAF, ISAF, I-ISAF, CF, SCF, or HAF carbon which is furnace carbon black is used, the above ratio is particularly good in the range of 0.7 to 1.5. What has been confirmed experimentally.
  • the carbon black preferably has a carbon content of 97% by weight or more.
  • Carbon black contains impurities such as ash, O 2, H 2 and the like, and when the amount of these impurities is large, the electrical characteristics deteriorate. Therefore, the higher the carbon purity, the better.
  • the most characteristic point of the crosslinked polyolefin composition according to the present invention is that it contains at least one compound selected from triallyl isocyanurate or trimethallyl isocyanurate as a crosslinking assistant.
  • the compounding ratio is 0.02 to 2 parts by mass. If the amount is less than 0.02 parts by mass, the effect of suppressing the decrease in insulation performance due to the high temperature heat history can not be obtained. On the other hand, when the amount is more than 2 parts by mass, slip and resin burn occur in the extruder when extruding the crosslinked polyolefin composition. When resin burning occurs, the resin pressure rises during extrusion, making it impossible to produce a stable DC power cable.
  • a further preferable compounding amount of the crosslinking coagent is 0.1 to 2 parts by mass. By blending 0.1 parts by mass or more, the blending amount of the organized oxide crosslinking agent can be reduced, and the effect of suppressing resin burning in the extruder can also be obtained.
  • organic peroxide crosslinking agent any organic peroxide used for ordinary crosslinking may be used.
  • dicumyl peroxide (DCP) dicumyl peroxide
  • t-butylcumyl peroxide t-butylcumyl peroxide
  • ⁇ , ⁇ '-bis t-butylperoxy-m-isopropyl
  • the decomposition residue of t-butylcumyl peroxide and ⁇ , ⁇ '-bis (t-butylperoxy-m-isopropyl) benzene contains, like the decomposition residue of DCP, compounds having a polar group such as a hydroxyl group.
  • DCP dicumyl peroxide
  • t-butylcumyl peroxide t-butylcumyl peroxide
  • ⁇ , ⁇ '-bis t-butylperoxy-m-isopropyl
  • the present invention can solve this problem.
  • the compounding quantity of the organic peroxide crosslinking agent is suitably adjusted with the kind of organic peroxide to be used, polyolefin, etc.
  • the amount is preferably 0.1 to 5 parts by mass, and more preferably 0.5 to 3 parts by mass.
  • the compounding amount of the organic peroxide crosslinking agent is too small, crosslinking is insufficient and mechanical properties and heat resistance of the insulating layer are lowered.
  • the compounding amount of the organic peroxide crosslinking agent is too large, resin extruding occurs in the extruder when extruding the crosslinked polyolefin composition. When resin burning occurs, the resin pressure rises during extrusion, making it impossible to produce a stable DC power cable. Also, the electrical performance of the DC power cable is degraded.
  • antioxidant commonly used antioxidants can be appropriately selected and blended. Phenolic, phosphite and thioether anti-aging agents are preferred. In particular, 4,4′-thiobis (3-methyl-6-tert-butylphenol) has the effect of suppressing the crosslinking reaction when extruding the crosslinked polyolefin composition, and is thus preferable.
  • the compounding amount of the antioxidant is appropriately adjusted in consideration of the type of the antioxidant to be used and the oxidation resistance, but is preferably 0.1 to 1.0 parts by mass.
  • FIG. 1 is a cross-sectional view of the created DC cable 10.
  • the direct current power cable 10 is formed by sequentially forming an inner semiconductive layer 12, an insulating layer 13, an outer semiconductive layer 14, a metal shielding layer 15, and a sheath 16 outside the conductor 11.
  • the cross-sectional area of the conductor 11 is 200 mm 2
  • the thickness of the insulating layer 13 is 3 mm
  • the thicknesses of the inner semiconductive layer 12 and the outer semiconductive layer 14 are 1 mm.
  • Inner semiconductive layer The inner semiconductive layer 12 is formed of ethylene-vinyl acetate copolymer, organic peroxide crosslinker (DCP), carbon black (acetylene black), antioxidant (4,4'-thiobis ( It formed using the composition (semiconductive resin composition) which mix
  • Insulating Layer The insulating layer 13 was formed using the crosslinked polyethylene composition according to the present invention.
  • the compounding ratio (parts by mass) of the polyolefin, carbon black, crosslinking aid and organic peroxide crosslinking agent is as shown in Tables 1 to 4.
  • Carbon black has a specific surface area of 140 m 2 / g as measured by the BET method, an oil absorption of 114 cc / 100 g of mineral oil, a carbon content of 97.5 mass%, and an average particle size of primary particles of 18 nm and coarse particles of 300 nm or more An amount of 1% or less of furnace carbon black SA was used.
  • the ratio of oil absorption (cc / 100 g) of mineral oil to specific surface area (m 2 / g) is 0.8.
  • Triallyl isocyanurate or trimethallyl isocyanurate was used as a coagent.
  • the organic peroxide crosslinking agent DCP, t-butylcumyl peroxide, ⁇ , ⁇ '-bis (t-butylperoxy-m-isopropyl) benzene was used.
  • the above materials were kneaded with a Banbury mixer, passed through a metal screen mesh with an opening of 34 ⁇ m, and further mixed with DCP using a Henschel mixer to prepare a crosslinked polyethylene composition.
  • (3) Outer Semiconductive Layer The outer semiconductive layer 14 was formed using a semiconductive resin composition having the same composition as the inner semiconductive layer 12.
  • compositions (1) to (3) are simultaneously extruded to the outer peripheral part of the conductor 11, and pressure heating is performed at a pressure of 10 kg / cm 2 and a temperature of 280 ° C. in a nitrogen atmosphere, and an organic peroxide crosslinking agent is used as an initiator
  • the crosslinking was advanced by the radical reaction.
  • a metal shielding layer and a sheath were provided by a conventional method to prepare a DC power cable.
  • the DC power line was manufactured by connecting the DC power cable 10 created by the above procedure.
  • a schematic cross section of the cable connection is shown in FIG.
  • the cable connection portion is formed by connecting two DC power cables 10, 10 with the conductors 11, 11 facing each other at their ends and facing each other (reference numeral 21 in the figure).
  • the conductive layer 22, the insulating layer 23, and the outer semiconductive layer 24 are sequentially coated.
  • the inner semiconductive layer 22 and the insulating layer 23 are formed by sequentially winding a semiconductive tape and an insulating tape around the conductors 11 and 11 butted connected to each other to a predetermined thickness and then heating and fusing the wound tape. Be done.
  • the outer semiconductive layer 24 is formed using a semiconductive shrink tube.
  • the semiconductive tape and the semiconductive shrink tube were formed using the same semiconductive resin composition (before crosslinking) as the inner semiconductive layer 12 and the outer semiconductive layer 14 of the DC power cable 10.
  • the insulating tape is obtained by extruding a crosslinked polyethylene composition (before crosslinking) of the same composition as the insulating layer 13 of the DC power cable 10 into a tape having a thickness of 0.1 mm, a width of 20 mm, and a length of 150 m by a single screw extruder. Created by doing.
  • the outer periphery of the semiconductive shrink tube was coated with a gas barrier layer, and the outer periphery of the gas barrier layer was coated with a heater. Further, a cross-linked tube consisting of two halves of the mold and packing at both ends was assembled on the outside of the heater.
  • the cross-linked tube is selected to be sufficiently longer than the distance (the range of A to C in FIG. 2) between the outer semiconductive layers 14 of the two DC power cables 10.
  • the distance between the outer semiconductive layers 14 is 760 mm, and a cross-linked tube having a length of 1150 mm covering A to D in FIG. 2 was used.
  • the internal pressure in the cross-linking tube was adjusted to 0.8 MPa with nitrogen gas, and the temperature was raised by a heater and held at 220 ° C. for 3 hours to form the insulating layer 23 and the outer semiconductive layer 24.
  • the broken part In the case of breakage between both ends 23A and 23A of the insulating layer 23, the broken part is A, and in the case of breakage at both ends 23A and 23A of the insulating layer 23, the broken part is B and the end 23A of the insulating layer 23
  • the fracture site is C if it is fractured with the end 14A of the outer semiconductive layer 14 or the fracture site if it is fractured between the end 14A of the outer semiconductive layer 14 and the end of the bridging tube. It was D.
  • Tables 1 to 4. In manufacturing a direct current power cable, the pressure of the extruded resin was measured with a 34 ⁇ m metal screen mesh portion attached to the tip of the insulating layer extruder screw.
  • the extrusion characteristics were evaluated from the rising tendency of the resin pressure 5 hours after the start of the extrusion.
  • the criteria for evaluation are as follows. Moreover, x was displayed for what a slip produced in the extruder and stable extrusion was not able to be performed. -: Almost no rise in resin pressure is observed. +: A rise in resin pressure is observed, but there is no problem at all in the production of a long cable. ++: An increase in resin pressure is observed, but a long cable can be manufactured. + ++: Resin pressure rise is recognized, and it is difficult to manufacture a long cable.
  • LDPE made by DOW NUC-9026 A: Center of connection, B: Upstanding tape insulation layer, C: Outer conductor treatment section, D: Cable reheating section
  • LDPE made by DOW NUC-9026 A: Center of connection, B: Upstanding tape insulation layer, C: Outer conductor treatment section, D: Cable reheating section
  • the compounding amount of the crosslinking aid was 0.01 parts by mass (Comparative Examples 1, 5, 8 and 10)
  • the direct current breakdown voltage was 200 or less in absolute value, and the direct current electrical characteristics were poor.
  • the fracture site was a D portion outside the end 14 A of the outer semiconductive layer 14. The failure occurred at such a site because the direct current electrical characteristics of the insulating layer 13 of the direct current power cable were deteriorated by the heat treatment for crosslinking the crosslinked polyethylene composition to be the insulating layer 23 of the connection portion.
  • Example 4 and Comparative Example 1 The blending amounts of the crosslinking agent in Example 4 and Comparative Example 1, Example 10 and Comparative Example 5, Example 13 and Comparative Example 8, and Example 16 and Comparative Example 10 are the same.
  • the direct current electricity in Examples 4, 10, 13, 16 is higher than that in Comparative Examples 1, 5, 8, 10.
  • the decrease in characteristics is small. From this result, it can be seen that the effect of preventing deterioration of the direct current electrical characteristics at the time of reheating becomes remarkable when the triallyl isocyanurate or trimethallyl isocyanurate is added in an amount of not less than 0.02 parts by mass.
  • Comparative Example 3 in which the blending amount of carbon black is small, and Comparative Example 4 in which the blending amount of carbon black is large, the DC breakdown voltage is low and the DC electrical characteristics are not sufficient.
  • the comparative example 7 is an example which mix
  • the cable D is broken at -160 kV. This destruction occurs because the DC electric characteristics of the insulating layer 13 of the DC power cable are deteriorated by the heat treatment for crosslinking the crosslinked polyethylene composition to be the insulating layer 23 of the connection portion. From this result, it can be seen that m? -Phenylene bismaleimide does not have an effect like triallyl isocyanurate or trimethallyl isocyanurate.
  • the cross-linked polyethylene composition according to the present invention it is possible to obtain a DC power cable with little deterioration in electrical characteristics even when subjected to heat history. Also, this DC power cable can be used for higher voltage DC power transportation.
  • connection method of cable the method of forming the insulating layer by winding the insulating tape and heating it is described, but the connection method used in the method of manufacturing the DC power line of the present invention is Any other method may be employed as long as the connecting portion is covered with an insulating material and heat treated.
  • a so-called extrusion molding method (EMJ) of extruding an insulating material using an extruder and heating and crosslinking it to form an insulating layer may be adopted as a connection method. it can.
  • EMJ extrusion molding method
  • the insulating material used to connect the cable may not have the same composition as the insulating material used for the cable insulator shown in the embodiment, as long as it is a DC insulating material.

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PCT/JP2011/051046 2010-01-28 2011-01-21 架橋ポリオレフィン組成物、直流電力ケーブル及び直流電力線路の施工方法 WO2011093211A1 (ja)

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CN201180007567.6A CN102725344B (zh) 2010-01-28 2011-01-21 交联聚烯烃组合物、直流电力电缆和直流电力线路的施工方法
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HK13103782.1A HK1176371A1 (zh) 2010-01-28 2013-03-26 交聯聚烯烴組合物、直流電力電纜和直流電力線路的施工方法

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014040237A1 (en) * 2012-09-12 2014-03-20 Dow Global Technologies Llc Cross-linkable polymeric compositions, methods for making the same, and articles made therefrom
WO2014148071A1 (ja) * 2013-03-22 2014-09-25 株式会社オートネットワーク技術研究所 端子付き被覆電線
WO2016000735A1 (en) 2014-06-30 2016-01-07 Abb Technology Ltd Power transmission cable
EP3336858A4 (en) * 2015-08-10 2018-08-22 Sumitomo Electric Industries, Ltd. Dc cable, and method for manufacturing composition and dc cable
WO2020008056A1 (de) * 2018-07-06 2020-01-09 Nkt Gmbh & Co. Kg Verbindungsmuffe mit konische aufnahmebereiche zur aufnahme von konisch abgementelten kabelenden
EP3951807A4 (en) * 2019-03-29 2022-11-09 Furukawa Electric Co., Ltd. INSULATING TAPE FOR COVERING A POWER CABLE CONNECTING PART, METHOD FOR FORMING AN INSULATING COATING ON THE OUTER SURFACE OF A POWER CABLE CONNECTING PART, AND POWER CABLE

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2986302C (en) * 2015-05-22 2022-10-25 Dow Global Technologies Llc Processes for preparing cables with crosslinked insulation layer and cables for same
JP6205032B1 (ja) * 2016-08-09 2017-09-27 株式会社Ｎｕｃ 直流電力ケーブル用絶縁性樹脂組成物、樹脂架橋体、直流電力ケーブル、直流電力ケーブル接続部の補強絶縁層形成用部材および直流電力ケーブル接続部
CN107573574B (zh) * 2017-09-07 2020-08-11 南京南瑞集团公司 ±525kV及以下直流电缆屏蔽材料及其制备方法
JP6852229B2 (ja) 2019-03-29 2021-03-31 古河電気工業株式会社 絶縁性樹脂組成物およびその製造方法、絶縁テープおよびその製造方法、絶縁層形成方法、ならびに電力ケーブルおよびその製造方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250043A (ja) * 1985-04-27 1986-11-07 Asahi Chem Ind Co Ltd 架橋回転成形用組成物
JPS61253712A (ja) * 1985-05-03 1986-11-11 株式会社フジクラ 直流電力ケ−ブル
JPS6291544A (ja) * 1985-10-17 1987-04-27 Mitsubishi Cable Ind Ltd 難燃性組成物
JPH0450253A (ja) * 1990-06-19 1992-02-19 Mitsubishi Cable Ind Ltd 難燃性樹脂組成物の製造方法
JPH08283470A (ja) * 1995-04-20 1996-10-29 Mitsubishi Cable Ind Ltd ゴム組成物
JP2001310980A (ja) * 2000-04-28 2001-11-06 Nippon Unicar Co Ltd 架橋性エチレン系樹脂組成物及びこれを被覆してなる電線・ケーブル
JP2003192865A (ja) * 2001-12-27 2003-07-09 Mitsubishi Cable Ind Ltd ノンハロゲン難燃組成物およびそれを用いた電線またはケーブル
JP2009114267A (ja) * 2007-11-02 2009-05-28 Viscas Corp 液状の樹脂添加剤、並びに、それを用いた直流送電用オレフィン系樹脂絶縁電力ケーブルおよび直流送電用オレフィン系樹脂絶縁電力ケーブル接続部の絶縁体成形用の樹脂組成物の製造方法。

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3602297B2 (ja) * 1997-06-25 2004-12-15 株式会社フジクラ 直流電力ケーブル
JP2001325834A (ja) * 2000-05-15 2001-11-22 Furukawa Electric Co Ltd:The 直流電力ケーブル

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250043A (ja) * 1985-04-27 1986-11-07 Asahi Chem Ind Co Ltd 架橋回転成形用組成物
JPS61253712A (ja) * 1985-05-03 1986-11-11 株式会社フジクラ 直流電力ケ−ブル
JPS6291544A (ja) * 1985-10-17 1987-04-27 Mitsubishi Cable Ind Ltd 難燃性組成物
JPH0450253A (ja) * 1990-06-19 1992-02-19 Mitsubishi Cable Ind Ltd 難燃性樹脂組成物の製造方法
JPH08283470A (ja) * 1995-04-20 1996-10-29 Mitsubishi Cable Ind Ltd ゴム組成物
JP2001310980A (ja) * 2000-04-28 2001-11-06 Nippon Unicar Co Ltd 架橋性エチレン系樹脂組成物及びこれを被覆してなる電線・ケーブル
JP2003192865A (ja) * 2001-12-27 2003-07-09 Mitsubishi Cable Ind Ltd ノンハロゲン難燃組成物およびそれを用いた電線またはケーブル
JP2009114267A (ja) * 2007-11-02 2009-05-28 Viscas Corp 液状の樹脂添加剤、並びに、それを用いた直流送電用オレフィン系樹脂絶縁電力ケーブルおよび直流送電用オレフィン系樹脂絶縁電力ケーブル接続部の絶縁体成形用の樹脂組成物の製造方法。

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014040237A1 (en) * 2012-09-12 2014-03-20 Dow Global Technologies Llc Cross-linkable polymeric compositions, methods for making the same, and articles made therefrom
US20150203701A1 (en) * 2012-09-12 2015-07-23 Dow Global Technologies Llc Cross-linkable polymeric compositions, methods for making the same, and articles made therefrom
JP2015534589A (ja) * 2012-09-12 2015-12-03 ダウ グローバル テクノロジーズ エルエルシー 架橋性ポリマー組成物、その作製方法、およびそれから作製される物品
US9957405B2 (en) * 2012-09-12 2018-05-01 Dow Global Technologies Llc Cross-linkable polymeric compositions, methods for making the same, and articles made therefrom
WO2014148071A1 (ja) * 2013-03-22 2014-09-25 株式会社オートネットワーク技術研究所 端子付き被覆電線
WO2016000735A1 (en) 2014-06-30 2016-01-07 Abb Technology Ltd Power transmission cable
EP3336858A4 (en) * 2015-08-10 2018-08-22 Sumitomo Electric Industries, Ltd. Dc cable, and method for manufacturing composition and dc cable
EP3336857A4 (en) * 2015-08-10 2018-09-05 Sumitomo Electric Industries, Ltd. Dc cable, composition, and method for manufacturing dc cable
US10643763B2 (en) 2015-08-10 2020-05-05 Sumitomo Electric Industries, Ltd. Direct-current cable, composition and method of manufacturing direct-current cable
WO2020008056A1 (de) * 2018-07-06 2020-01-09 Nkt Gmbh & Co. Kg Verbindungsmuffe mit konische aufnahmebereiche zur aufnahme von konisch abgementelten kabelenden
EP3951807A4 (en) * 2019-03-29 2022-11-09 Furukawa Electric Co., Ltd. INSULATING TAPE FOR COVERING A POWER CABLE CONNECTING PART, METHOD FOR FORMING AN INSULATING COATING ON THE OUTER SURFACE OF A POWER CABLE CONNECTING PART, AND POWER CABLE
US11823816B2 (en) 2019-03-29 2023-11-21 Furukawa Electric Co., Ltd. Insulating tape for coating connection portion of power cable, method for forming insulating coating on exterior surface of connection portion of power cable, and power cable

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HK1176371A1 (zh) 2013-07-26
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