WO2021210945A1 - Composition d'isolation et câble d'alimentation comprenant une couche d'isolation formée à partir de celle-ci - Google Patents

Composition d'isolation et câble d'alimentation comprenant une couche d'isolation formée à partir de celle-ci Download PDF

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WO2021210945A1
WO2021210945A1 PCT/KR2021/004805 KR2021004805W WO2021210945A1 WO 2021210945 A1 WO2021210945 A1 WO 2021210945A1 KR 2021004805 W KR2021004805 W KR 2021004805W WO 2021210945 A1 WO2021210945 A1 WO 2021210945A1
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resin
weight
parts
polypropylene resin
composition
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PCT/KR2021/004805
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Korean (ko)
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박도현
주동욱
이태현
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엘에스전선 주식회사
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Priority claimed from KR1020210049614A external-priority patent/KR20210128934A/ko
Publication of WO2021210945A1 publication Critical patent/WO2021210945A1/fr

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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
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • 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
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • 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
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; 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
    • 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

Definitions

  • the present invention relates to an insulating composition and a power cable having an insulating layer formed therefrom.
  • the present invention is a non-crosslinked type that is environmentally friendly, such as recyclable, and at the same time has mechanical and electrical properties equivalent to or higher than that of conventional crosslinked insulating materials, and has an operating temperature of 130°C
  • a power cable having an insulating composition that satisfies heat deformation characteristics and has excellent physical properties such as flexibility, flame retardancy, water resistance, and extrudability, and an insulating layer formed therefrom is a non-crosslinked type that is environmentally friendly, such as recyclable, and at the same time has mechanical and electrical properties equivalent to or higher than that of conventional crosslinked insulating materials, and has an operating temperature of 130°C
  • a power cable having an insulating composition that satisfies heat deformation characteristics and has excellent physical properties such as flexibility, flame retardancy, water resistance, and extrudability, and an insulating layer formed therefrom.
  • a general power cable includes a conductor and an insulating layer surrounding it, and an inner semiconducting layer between the conductor and the insulating layer, an outer semiconducting layer surrounding the insulating layer, a sheath layer surrounding the outer semiconducting layer, etc. .
  • an insulating material for manufacturing an insulating layer that has excellent mechanical and electrical properties and can minimize heating deformation at a high temperature in which a high-capacity cable is operated. has become a necessity.
  • a base resin constituting the insulating material a polyolefin polymer obtained by crosslinking polyethylene, an ethylene/propylene elastic copolymer (EPR), or an ethylene/propylene/diene copolymer (EPDM) has been generally used. This is because the conventional cross-linked resin maintains excellent flexibility and satisfactory electrical and mechanical strength even at high temperatures.
  • EPR ethylene/propylene elastic copolymer
  • EPDM ethylene/propylene/diene copolymer
  • the cross-linked polyethylene (XLPE) which has been used as the base resin constituting the insulating material, is in a cross-linked form, when the life of the cable including the insulating layer made of the cross-linked polyethylene or the like is over, the insulating layer is formed. It is not environmentally friendly as it is impossible to recycle the used resin and has no choice but to dispose of it by incineration.
  • PVC polyvinyl chloride
  • XLPE cross-linked polyethylene
  • non-crosslinked high-density polyethylene (HDPE) or low-density polyethylene (LDPE) is environmentally friendly, such as recycling the resin constituting the insulating layer, when the life of a cable including an insulating layer manufactured therefrom has expired, but crosslinking Compared to polyethylene (XLPE) in the form of polyethylene (XLPE), it is inferior in heat resistance and heat deformation characteristics, and its use is very limited due to a low operating temperature.
  • An object of the present invention is to provide an insulating composition that is environmentally friendly, such as recyclable, and has mechanical and electrical properties equal to or higher than that of a conventional cross-linked insulating material, and a power cable having an insulating layer formed therefrom.
  • the present invention satisfies the heat deformation characteristics at 130° C. required for an insulating layer of a cable having an operating temperature of 90° C.
  • An object of the present invention is to provide a power cable having a
  • An insulating composition for forming an insulating layer of a power cable comprising a polypropylene resin and a polyolefin elastomer resin, wherein the polypropylene resin comprises a homophasic polypropylene resin and a heterophasic polypropylene resin, wherein the polyolefin elastomer resin has a melting point (Tm) ) is 60 to 90 ° C , and the insulating layer specimen formed from the insulating composition has a melt flow rate (MFR) of 20 to 26 g/10 min (190 ° C., 21.6 kg), providing an insulating composition.
  • Tm melting point
  • MFR melt flow rate
  • the insulation layer specimen formed from the insulation composition provides an insulation composition, characterized in that the minimum torque (ML) (190° C.) is 1.1 to 1.3 lb-in.
  • the homophasic polypropylene resin is a propylene monomer and at least one copolymer selected from the group consisting of ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene and 1-octene. It provides an insulating composition comprising a propylene block copolymer formed by copolymerization of monomers.
  • the propylene block copolymer provides an insulating composition, characterized in that polymerization under a metallocene catalyst.
  • the homo-phase polypropylene resin provides an insulating composition, characterized in that the melting point (Tm) of 160 to 170 °C.
  • the heterophasic polypropylene resin provides an insulating composition, characterized in that the rubbery polypropylene resin is dispersed in a crystalline or semi-crystalline polypropylene matrix resin.
  • the crystalline or semi-crystalline polypropylene matrix resin provides an insulating composition, characterized in that it comprises a propylene homopolymer.
  • the rubbery polypropylene resin provides an insulating composition, characterized in that it comprises propylene-ethylene rubber (PER) or propylene-ethylene diene rubber (EPDM).
  • PER propylene-ethylene rubber
  • EPDM propylene-ethylene diene rubber
  • the content of the homophasic polypropylene resin is 10 to 25 parts by weight
  • the content of the heterophasic polypropylene resin is 5 to 10 parts by weight
  • the content of the polyolefin elastomer resin is It provides an insulating composition, characterized in that 50 to 85 parts by weight.
  • the content of the polyolefin elastomer grafted with maleic anhydride in the polyolefin elastomer resin is 10 to 20 parts by weight.
  • the base resin In addition, based on 100 parts by weight of the base resin, it provides an insulating composition comprising 150 to 190 parts by weight of magnesium hydroxide as a flame retardant and 15 to 22 parts by weight of melamine cyanurate as a flame retardant auxiliary agent.
  • the base resin based on 100 parts by weight of the base resin , 1 to 20 parts by weight of calcium carbonate (CaCO 3 ) as a filler, and at least one selected from the group consisting of lubricants, antioxidants, moisture absorbers, processing stabilizers and pigments as other additives It provides an insulating composition, characterized in that it contains 0.1 to 10 parts by weight.
  • CaCO 3 calcium carbonate
  • conductor On the other hand, conductor; and an insulating layer surrounding the conductor and formed from the insulating composition, providing a power cable.
  • the insulating composition according to the present invention is environmentally friendly, such as being recyclable in a non-crosslinked type through a specific combination of base resin, and exhibits an excellent effect of retaining mechanical and electrical properties equal to or higher than that of conventional crosslinked insulating materials.
  • the insulation composition according to the present invention satisfies the heat deformation characteristics at 130°C required for the insulation layer of a cable having an operating temperature of 90°C through a specific combination of a base resin and an additive, and has flexibility, flame retardancy, water resistance, and extrudability. It shows the effect excellent in physical properties, such as.
  • FIG. 1 schematically shows a cross-sectional structure of a power cable according to the present invention.
  • the insulating composition according to the present invention may include a base resin, a flame retardant, a filler, and other additives.
  • the base resin is a polypropylene resin comprising a homophasic polypropylene resin having a melting point (Tm) of 160 to 170 °C and a heterophasic polypropylene resin having a melting point (Tm) of 135 to 145 °C, and a melting point (Tm) of 60 to 90 °C polyolefin elastomer (POE).
  • Tm melting point
  • POE polyolefin elastomer
  • the homo-phase polypropylene resin is a crystalline or semi-crystalline polypropylene resin that is at least partially crystallized at a specific temperature upon cooling from a molten state, and performs a function of improving mechanical properties, heat resistance, and heat deformation properties of the insulating composition.
  • the homophasic polypropylene resin may include a propylene homopolymer and/or a propylene copolymer, preferably propylene monomer and ethylene and 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, and a propylene block copolymer formed by copolymerization of one or more comonomers selected from the group consisting of C 4-12 alpha-olefins such as 1-heptene and 1-octene.
  • the homophasic polypropylene resin may be polymerized under conventional stereo-specific Ziegler-Natta catalysts, metallocene catalysts, constrained geometry catalysts, other organometallic or coordination catalysts, preferably Ziegler-Natta catalysts or metallocene catalysts. It can be polymerized under conventional stereo-specific Ziegler-Natta catalysts, metallocene catalysts, constrained geometry catalysts, other organometallic or coordination catalysts, preferably Ziegler-Natta catalysts or metallocene catalysts. It can be polymerized under conventional stereo-specific Ziegler-Natta catalysts, metallocene catalysts, constrained geometry catalysts, other organometallic or coordination catalysts, preferably Ziegler-Natta catalysts or metallocene catalysts. It can be polymerized under conventional stereo-specific Ziegler-Natta catalysts, metallocene catalysts, constrained geometry catalysts, other organometallic or coordination catalysts, preferably Ziegler-Natta catalysts or metallocene catalysts. It
  • the metallocene is a generic term for bis(cyclopentaidenyl)metal, which is a new organometallic compound in which cyclopentadiene and a transition metal are combined in a sandwich structure, and the general formula of the simplest structure is M(C 5 H 5 ) 2 (here , M is Ti, V, Cr, Fe, Co, Ni, Ru, Zr, Hf, etc.).
  • the homophasic polypropylene polymerized under the metallocene catalyst has a low catalyst residual amount of about 200 to 700 ppm, the electrical properties of the insulating composition including the homophasic polypropylene are suppressed or minimized due to the catalyst residual amount. can do.
  • the heterophasic polypropylene resin is a polypropylene resin containing two or more phases of a resin, specifically a crystalline or semi-crystalline resin and a rubbery resin, and performs a function of improving flexibility, cold resistance, etc. of the insulating composition do.
  • the heterophasic polypropylene resin is a blended resin of the crystalline or semi-crystalline polypropylene resin and the rubbery polypropylene resin, or the crystalline or semi-crystalline polypropylene resin and the rubbery polypropylene resin are polymerized together to form a crystalline or semi-crystalline poly It may include a heterophasic polypropylene resin in which a rubbery polypropylene resin is dispersed in a propylene matrix resin.
  • the crystalline or semi-crystalline polypropylene resin may include a propylene homopolymer and/or a propylene copolymer like the homophase polypropylene resin, preferably a propylene homopolymer, more preferably propylene alone It may contain only polymers.
  • the propylene homopolymer refers to a polypropylene resin formed by polymerization of propylene monomers of 99% by weight or more, preferably 99.5% by weight or more, based on the total weight of the monomers.
  • the crystalline or semi-crystalline polypropylene resin can also be polymerized under a metallocene catalyst in the same manner as the homo-phase polypropylene resin, thereby suppressing or minimizing deterioration of the electrical properties of the insulating composition due to a low residual amount of catalyst.
  • the rubbery polypropylene resin dispersed in the crystalline or semi-crystalline polypropylene matrix resin or blended with the crystalline or semi-crystalline polypropylene resin is substantially amorphous and contains ethylene and 1-butene, 1-pentene, 4-methyl-1 It may include one or more comonomers selected from the group consisting of C 4-12 alpha-olefins such as -pentene, 1-hexene, 1-heptene, and 1-octene.
  • the rubbery polypropylene resin may include propylene-ethylene rubber (PER) or propylene-ethylene diene rubber (EPDM).
  • the particle size of the rubbery polypropylene resin may be micro or nano size. Such a particle size of the rubbery polypropylene resin ensures uniform dispersion of the rubbery polypropylene resin in the crystalline or semi-crystalline polypropylene matrix resin, and can improve the mechanical strength of the insulating layer including the same. . The particle size also improves the likelihood of stopping an already formed crack or crack while reducing the risk factor for cracking initiated by the particle.
  • the polyolefin elastomer (POE) has excellent compatibility with the polypropylene resin, and in particular, has a low crystallinity compared to the polypropylene resin and has excellent loading properties with additives such as flame retardants. Even in this case, it is possible to avoid or minimize the deterioration of mechanical properties, flexibility, etc. while improving the flame retardancy by uniform dispersion of the flame retardant.
  • the polyolefin elastomer (POE) may include a polyolefin elastomer (POE) grafted with maleic anhydride.
  • the content of the homophasic polypropylene resin is 10 to 25 parts by weight
  • the content of the heterophasic polypropylene resin is 5 to 10 parts by weight
  • the content of the polyolefin elastomer (POE) is It may be 50 to 85 parts by weight
  • the content of the maleic anhydride grafted polyolefin elastomer (POE) in the polyolefin elastomer (POE) may be 10 to 20 parts by weight.
  • the content of the homophasic polypropylene resin is less than the standard, mechanical properties, heat resistance, heat deformation properties, etc. of the insulating layer may be deteriorated, and when the content of the heterophasic polypropylene resin is less than the standard, the flexibility of the insulating layer , cold resistance, impact resistance, etc.
  • the content of the polyolefin elastomer (POE) is less than the standard, physical properties such as extrudability and electrical/mechanical properties of the insulating composition may be reduced, and in particular, maleic anhydride
  • the content of the grafted polyolefin elastomer (POE) is less than the standard, the coupling property between the additive such as a flame retardant and the base resin is lowered, so that the overall mechanical properties, flame retardancy, etc. of the insulating composition may be lowered.
  • the filler loading property of the insulating composition with respect to the flame retardant is insufficient, and mechanical properties such as elongation of the insulating layer formed from the insulating composition may be reduced. have.
  • the content of the heterophasic polypropylene resin exceeds the standard while the total content of the base resin is maintained, the rubber content in the heterophasic polypropylene resin increases, and the extrudability due to an increase in the extrusion load during extrusion of the insulating composition
  • the content of the homophasic polypropylene resin is reduced, the heat resistance and heat deformation characteristics of the insulating composition may be reduced, while at the same time, if the content of the polyolefin elastomer (POE) is reduced accordingly Since the filler loading property of the insulating composition with respect to a flame retardant or the like is insufficient, mechanical properties such as elongation of an insulating layer formed from the insulating composition may be deteriorated.
  • the content of the polyolefin elastomer (POE) exceeds the standard, since the melting point of the polyolefin elastomer (POE) is relatively low, the heat resistance of the insulating composition may decrease, and the hardness of the insulating layer formed from the insulating composition may decrease. decreased, and the possibility that the heat deformation characteristics will not satisfy the standard value increases, and in particular, when the content of polyolefin elastomer (POE) grafted with maleic anhydride exceeds the standard, the room temperature elongation rate of the insulating layer decreases, the insulation When the composition is extruded, problems such as lowering of extrudability may be caused due to an increase in the extrusion load.
  • the present inventors have found that the insulating composition according to the present invention has a melting flow rate (MFR) of 20 to 26 g/10min (190°C, 21.6) on the premise that the above-described non-crosslinking type specific base resin is included. kg), and when the melting level (ML) (190° C.) is adjusted to 1.1 to 1.3 lb-in, preferably the relationship between the melt flow rate (MFR) and the lowest torque (ML) is When the following Equation 1 is satisfied, the physical properties are the standards despite the addition of a flame retardant in an amount to realize the desired flame retardancy while satisfying the electrical properties, mechanical properties, extrudability, etc. required for the insulation layer of the electric wire for indoor wiring. The present invention was completed by experimentally confirming that it does not deteriorate due to underachievement.
  • MFR melting flow rate
  • the lowest point torque (ML) is one of the values measured through a moving-die rheonmeter (MDR) equipment, and means a lower limit among torque values that change over time when the composition is rotated at the same angular velocity.
  • melt flow rate (MFR) of the insulating composition according to the present invention is less than 20 g/10min or the lowest torque (ML) is more than 1.3 lb-in
  • the extrusion flux is increased according to the increase in the load of the insulating composition during extrusion, the internal Problems with poor extrudability such as generation of bubbles in the extrudate due to heat generation may occur.
  • melt flow index (MFR) of the insulating composition according to the present invention is greater than 26 g/10min or the lowest torque (ML) is less than 1.1 lb-in
  • the melting index of the base resin itself included in the insulating composition is ; MI) is high or the content of processing aids such as lubricants is high If this is high, a problem of poor extrudability may occur, such as slippage of the insulating composition occurs in the extruder and a problem that the extrusion amount is lowered.
  • the insulating composition according to the present invention is environmentally friendly, such as being recyclable as a non-crosslinked type through a specific combination of the above-described base resin, and at the same time has mechanical and electrical properties equal to or higher than that of conventional crosslinked insulating materials, and has an operating temperature of 90°C. It not only satisfies the heat deformation characteristics at 130°C required for the insulation layer of the cable, but also realizes excellent effects in physical properties such as flexibility, flame retardancy, water resistance, and extrudability.
  • the flame retardant may include a non-halogen flame retardant such as a metal hydroxide flame retardant such as magnesium hydroxide and aluminum hydroxide, and a nitrogen-based flame retardant auxiliary agent such as melamine cyanurate.
  • a non-halogen flame retardant such as a metal hydroxide flame retardant such as magnesium hydroxide and aluminum hydroxide
  • a nitrogen-based flame retardant auxiliary agent such as melamine cyanurate.
  • the magnesium hydroxide as the flame retardant may include two or more kinds of magnesium hydroxide such as synthetic magnesium hydroxide and natural brucite magnesium hydroxide.
  • synthetic magnesium hydroxide has a tendency to be ionized by brine
  • the content of the synthetic magnesium hydroxide is somewhat lowered, and although the flame retardancy is somewhat lower than that of synthetic magnesium hydroxide, natural brushite having a low ionization tendency by brine can be mixed.
  • the weight mixing ratio of synthetic magnesium hydroxide and natural brushite magnesium hydroxide may be about 12:3 to 16:3.
  • Metal hydroxide inorganic particles such as magnesium hydroxide as the flame retardant are hydrophilic having high surface energy, whereas the base resin such as polypropylene is hydrophobic having low surface energy, so the inorganic particles have good dispersibility to the base resin. Also, the water resistance of the insulating layer may be lowered, thereby adversely affecting the electrical properties.
  • the surface of the inorganic particles such as magnesium oxide be hydrophobically treated with vinylsilane, stearic acid, oleic acid, aminopolysiloxane, titanate-based coupling agent, or the like.
  • hydrolyzed groups such as vinyl silane are attached by chemical bonding to the surface of inorganic particles such as magnesium hydroxide by condensation reaction, and the silane group reacts with the base resin to have excellent dispersibility can be obtained.
  • the content of the metal hydroxide as a flame retardant, especially magnesium hydroxide may be 150 to 190 parts by weight, and the content of the nitrogen-based flame retardant aid, particularly melamine cyanurate, which is a flame retardant auxiliary, may be 15 to 22 parts by weight.
  • the content of the flame retardant or the flame retardant auxiliary agent is less than the standard, the flame retardancy of the insulating layer may be insufficient, whereas if it exceeds the standard, the extrudability, elongation, etc. of the insulating layer may be greatly reduced.
  • the filler is added to reduce the manufacturing cost thereof while avoiding or minimizing deterioration of the physical properties of the insulating layer, and may include, for example, calcium carbonate (CaCO 3 ), and based on 100 parts by weight of the base resin, 1 It may be included in an amount of from 20 parts by weight.
  • CaCO 3 calcium carbonate
  • the other additives may include lubricants, antioxidants, moisture absorbers, processing stabilizers, pigments, etc., depending on the use of the cable, and may be added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the base resin.
  • the insulating composition according to the present invention has a modulus of 0.8 kgf/mm2 or more, 130 °C when the tensile strength at room temperature is 1.3 kgf/mm2 or more and the elongation at room temperature is 50% through the combination of the specific base resin and additives described above.
  • the heating strain may be less than 50%.
  • the heating strain rate can be measured according to the heating strain test standard of IEC 60811-3-1 among the standards IEC 60502-1, and specifically corresponds to the weight of the insulating layer specimen formed from the insulating composition according to the dimensions of the specimen. After leaving the specimen at 130°C for 4 hours while applying a load, the thickness reduction of the specimen may be less than 50%.
  • FIG. 1 schematically shows a cross-sectional structure of a power cable according to the present invention.
  • the power cable according to the present invention may include a conductor 10 made of a conductive material such as copper or aluminum and an insulating layer 20 formed by extrusion of the insulating composition described above.
  • the conductor 10 may be made of a stranded wire in which a plurality of wires are combined in terms of improving cold resistance, flexibility, flexibility, laying properties, workability, etc. of the power cable, and in particular, the plurality of wires is the conductor 10 It may include a plurality of conductor layers formed by being arranged in the circumferential direction.
  • a cable specimen was manufactured by extruding an insulating layer corresponding to the thickness specified in KS C 3341 on a 2.5 SQ single-core conductor.
  • the temperature condition of the single screw extruder used for extruding the insulating layer was set to 210°C based on the die.
  • the unit of the content shown in Table 1 below is parts by weight.
  • Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 resin 1 20 15 10 10 10 30 10 10 resin 2 5 5 15 15 15 25 15 15 resin 3 55 65 55 55 55 resin 4 60 resin 5 -60 resin 6 65 resin 7 15 20 20 10 20 15 20 resin 8 10 Flame Retardant 1 173 173 173 160 173 173 140 173 Flame Retardant 2 17 17 17 17 10 17 17 17 20 17 filler 10 etc 8 8 8 9 9 8 8 8 8 8 8
  • each insulating layer specimen (thickness 1 mm) of each of Examples and Comparative Examples was put into an oven at 135° C., taken out after 168 hours, cooled at room temperature for a sufficient time, and then tensile strength at a rate of 200 mm/min. And the elongation was measured to calculate the tensile strength and elongation at room temperature compared to the residual tensile and elongation.
  • the oxygen index was measured for an insulating layer specimen (thickness 3 mm) according to standards KS C 3341 and IEC 60332-1, and one cable specimen was fixed vertically from the ground, and a burner of the specified standard was installed at an angle of 45° to the cable specimen. After applying a flame for 60 seconds, the length of the portion where the insulating layer was not burned was measured 5 times during natural fire extinguishing, and the length should be 50 mm or more from the upper indicator tape in all 5 times.
  • the evaluation result is described as x/y, y is the number of evaluations, and x is the number of times evaluated as good.
  • the cable specimen was immersed in saline at 85°C and 1% concentration, and after applying a DC voltage of 500 V, insulation breakdown was evaluated for 240 hours.
  • melt flow rate was measured in the existing melt index (MI) evaluation equipment, and the lowest point torque (ML) was measured using the MDR (melt-draw ratio) evaluation equipment.
  • melt flow rate is filled and melted with an insulating specimen (thickness 3 mm, width and length less than 3 mm each) in a barrel that is vertically drilled and the lower capillary is arranged, and a load of 21.6 kg is applied at 190°C. It can be obtained by measuring the mass (g/10min) of the insulating composition discharged down through the capillary during 10 minutes.
  • the MDR evaluation facility is a facility for evaluating the high-temperature cross-linking properties of cross-linked materials in general.
  • An insulating specimen is sandwiched between the upper and lower disks, and the lower disk is rotated repeatedly at a predetermined angular speed at 190 ° C.
  • the applied torque is measured, and the minimum value (lb-in) of the measured torque is the lowest point torque (ML).
  • melt flow rate MFR
  • ML lowest point torque
  • the insulation compositions of Examples 1 and 2 according to the present invention and cables having an insulation layer formed therefrom have excellent room temperature mechanical properties, heat resistance, flame retardancy, water resistance, extrudability, and the like, whereas Comparative Examples In 1 to 4, 6 and 7, it was confirmed that the content of the heterophasic polypropylene resin as the base resin exceeded the standard and the extrudability was greatly reduced due to an increase in the extrusion load when the insulating composition was extruded. It was confirmed that elongation, heat resistance, flame retardancy, water resistance, etc. were significantly lowered due to insufficient filler loading properties for flame retardants, etc.
  • Comparative Example 3 As the silver base resin, it was confirmed that the melting point of the polyolefin elastomer was too high, and the loading property to the flame retardant was insufficient, so that the flame retardancy was lowered.
  • Comparative Example 4 does not contain a homophasic polypropylene resin as a base resin, so heat resistance and heat deformation characteristics are greatly reduced, and Comparative Example 5 does not contain a heterophasic polypropylene resin as a base resin, so heat resistance, flame retardancy, etc. was found to be lowered.

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  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition d'isolation et un câble d'alimentation comprenant une couche d'isolation formée à partir de celle-ci. Plus particulièrement, la présente invention concerne une composition d'isolation et un câble d'alimentation comprenant une couche d'isolation formée à partir de celle-ci, la composition d'isolation étant du type non réticulé, de manière à être respectueuse de l'environnement puisque son recyclage est possible et similaire et possédant simultanément au moins les mêmes propriétés mécaniques et électriques qu'un matériau d'isolation réticulé classique, satisfaisant à des caractéristiques de déformation thermique à 130 °C, qui sont requises pour la couche d'isolation d'un câble présentant une température de fonctionnement de 90 °C et présentant d'excellentes propriétés physiques telles que la flexibilité, l'ininflammabilité, l'étanchéité à l'eau et l'aptitude à l'extrusion.
PCT/KR2021/004805 2020-04-17 2021-04-16 Composition d'isolation et câble d'alimentation comprenant une couche d'isolation formée à partir de celle-ci WO2021210945A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2020-0046606 2020-04-17
KR20200046606 2020-04-17
KR1020210049614A KR20210128934A (ko) 2020-04-17 2021-04-16 절연 조성물 및 이로부터 형성된 절연층을 갖는 전력 케이블
KR10-2021-0049614 2021-04-16

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WO2021210945A1 true WO2021210945A1 (fr) 2021-10-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070134506A1 (en) * 2005-12-13 2007-06-14 Chasey Kent L Propylene elastomers for electrical wire and cable compounds
JP2013256670A (ja) * 2004-11-25 2013-12-26 Mitsui Chemicals Inc プロピレン系樹脂組成物およびその用途
KR20180138195A (ko) * 2018-10-23 2018-12-28 엘에스전선 주식회사 비할로겐계 난연성 폴리올레핀 절연 조성물 및 이로부터 형성된 절연층을 포함하는 전선
KR101943224B1 (ko) * 2017-12-12 2019-01-28 한화토탈 주식회사 이종 고무 성분을 포함하는 전선용 폴리올레핀 수지 조성물
KR20190055932A (ko) * 2017-11-16 2019-05-24 엘에스전선 주식회사 내한성 및 유연성이 우수한 절연 조성물 및 이로부터 형성된 절연층을 포함하는 케이블
KR20190072194A (ko) * 2017-12-15 2019-06-25 (주)티에스씨 고유연성 비가교 케이블용 절연층 조성물 및 고유연성 비가교 케이블

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013256670A (ja) * 2004-11-25 2013-12-26 Mitsui Chemicals Inc プロピレン系樹脂組成物およびその用途
US20070134506A1 (en) * 2005-12-13 2007-06-14 Chasey Kent L Propylene elastomers for electrical wire and cable compounds
KR20190055932A (ko) * 2017-11-16 2019-05-24 엘에스전선 주식회사 내한성 및 유연성이 우수한 절연 조성물 및 이로부터 형성된 절연층을 포함하는 케이블
KR101943224B1 (ko) * 2017-12-12 2019-01-28 한화토탈 주식회사 이종 고무 성분을 포함하는 전선용 폴리올레핀 수지 조성물
KR20190072194A (ko) * 2017-12-15 2019-06-25 (주)티에스씨 고유연성 비가교 케이블용 절연층 조성물 및 고유연성 비가교 케이블
KR20180138195A (ko) * 2018-10-23 2018-12-28 엘에스전선 주식회사 비할로겐계 난연성 폴리올레핀 절연 조성물 및 이로부터 형성된 절연층을 포함하는 전선

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