WO2020204048A1 - 難燃防蟻樹脂組成物、電力ケーブルならびにその製造方法および敷設方法 - Google Patents

難燃防蟻樹脂組成物、電力ケーブルならびにその製造方法および敷設方法 Download PDF

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Publication number
WO2020204048A1
WO2020204048A1 PCT/JP2020/014949 JP2020014949W WO2020204048A1 WO 2020204048 A1 WO2020204048 A1 WO 2020204048A1 JP 2020014949 W JP2020014949 W JP 2020014949W WO 2020204048 A1 WO2020204048 A1 WO 2020204048A1
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Prior art keywords
sheath
resin composition
flame
power cable
compound
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PCT/JP2020/014949
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English (en)
French (fr)
Japanese (ja)
Inventor
早記 菊池
貴裕 桜井
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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Priority to CN202080022418.6A priority Critical patent/CN113597445B/zh
Priority to JP2021512159A priority patent/JP7547321B2/ja
Publication of WO2020204048A1 publication Critical patent/WO2020204048A1/ja
Anticipated expiration legal-status Critical
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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
    • C08K3/38—Boron-containing compounds
    • 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
    • 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
    • C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
    • 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
    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the present invention relates to a flame-retardant ant-proof resin composition containing components having flame-retardant and ant-proof properties, a power cable having a sheath formed by using the flame-retardant ant-proof resin composition, and a method for manufacturing a power cable. And how to lay the power cable.
  • a cable such as a power cable or a communication cable such as an optical cable
  • a cable in which a sheath (protective outer coating) is coated as the outermost layer on the outer peripheral side of the core wire is widely used.
  • the sheath is required to have various functions depending on the place where the cable is laid. For example, in the cable laid in the ground in an area where termite activity is active, it has the property of preventing feeding damage by ants such as termites. In addition to certain termite resistance, it is required to have flame retardancy.
  • a method of imparting termite resistance to the cable a method of physically preventing termites from biting by hardening the sheath of the cable to prevent termites from biting, and a method of physically preventing termites from eating damage are effective in controlling termites.
  • the sheath constituting the cable is composed of two layers, a flame retardant vinyl layer and an outermost layer formed of a polypropylene resin composition, and the polypropylene resin composition is propylene alone. It contains a polymerized part, a polymer resin composed of a resin component having a solubility parameter of 7.0 or more and 9.5 or less, and a flame retardant, has a Rockwell hardness of 85 or more, and has a bending elasticity of 1500 MPa or more. Are listed.
  • the sheath that constitutes the outermost layer of the cable is made flame-retardant by the flame-retardant vinyl layer that constitutes it and the flame retardant contained in the outermost layer, and is contained in the polymerized resin that forms the outermost layer.
  • the mass ratio of the propylene homopolymerized portion contained therein is within a predetermined range, and the anti-termite property is imparted by setting the hardness and the flexural modulus to high.
  • Patent Document 2 as a resin composition having less volatilization and outflow (bleed-out) of the anti-termite component, triallyl isocyanurate, tripropyl isocyanurate or triethyl isocyanurate as the anti-termite component is used.
  • An anti-termite electric wire having a sheath made of polyethylene or the like is described.
  • the ant-proof electric wire imparts ant-proof properties to the cable by incorporating an ant-proof component in the sheath.
  • the anti-termite electric wire described in Patent Document 2 uses an anti-termite component (compound) having good compatibility with the base resin constituting the sheath in the sheath, and is premised on the termites biting the sheath. Since the material is designed so that the termite-proof component does not flow out from the sheath (termite-proof layer), there is a problem that feeding damage to the cable cannot be completely prevented.
  • an anti-termite component compound having good compatibility with the base resin constituting the sheath in the sheath, and is premised on the termites biting the sheath. Since the material is designed so that the termite-proof component does not flow out from the sheath (termite-proof layer), there is a problem that feeding damage to the cable cannot be completely prevented.
  • the anti-termite agent around the cable without adding the anti-termite agent to the material, but especially for long cables, it takes time for the anti-termite agent to adhere, so it is not so much. Not practical.
  • the sheath which is the outermost layer of the cable
  • An object of the present invention is a flame-retardant anti-termite resin composition which can form a sheath having excellent flame retardancy and anti-termite property in a single layer and is suitable for use in forming a sheath in extrusion processing. And to provide a power cable having a sheath formed by using it as a raw material, and a method for manufacturing and laying the same.
  • the present inventors have focused on the compatibility relationship between the base resin and the compound having an isocyanurate structure, and the contents of the boron-containing compound and the isocyanurate, and are flame-retardant, anti-termite and suitable for extrusion processing.
  • a base resin having a solubility parameter in the range of 7.1 or more and 11.6 or less and containing a compound having an isocyanurate structure and a boron-containing compound flame retardancy and anti-termite property are achieved. It was found that an excellent sheath can be formed in a single layer on both sides.
  • the gist structure of the present invention is as follows. (1) The content of the compound containing a base resin having a solubility parameter in the range of 7.1 or more and 11.6 or less, a compound having an isocyanurate structure, and a boron-containing compound, and having the isocyanurate structure is determined. The content is in the range of 0.05 to 10 parts by mass with respect to 100 parts by mass of the base resin, and the content of the boron-containing compound is in the range of 10 to 55 parts by mass with respect to 100 parts by mass of the base resin. , Flame-retardant ant-proof resin composition.
  • the flame-retardant ant-proof resin composition according to any one of (1) to (4) above which is used as a raw material for a sheath constituting the outermost layer of a power cable.
  • the flame-retardant ant-proof resin composition according to any one of (1) to (5) above which is a method for manufacturing a power cable in which a sheath is formed as an outermost layer on the outer peripheral side of the core wire.
  • a method for manufacturing a power cable which comprises a step of forming a sheath by extrusion molding on the outer peripheral side of the core wire.
  • a flame-retardant anti-termite resin composition capable of obtaining a sheath having excellent flame-retardant and anti-termite properties even with a single-layer structure and having suitability for extrusion processing, and a flame-retardant anti-termite resin composition thereof. It is possible to obtain a power cable using the above and a method for manufacturing and laying the same. As a result, when the flame-retardant ant-proof resin composition is used as the sheath of the power cable, the desired flame-retardant and ant-proof properties are exhibited in a single layer, so that the outer diameter of the power cable can be reduced. In addition, the electric power cable can be manufactured efficiently.
  • the flame-retardant ant-proof resin composition of the present invention contains a base resin having a solubility parameter in the range of 7.1 or more and 11.6 or less, a compound having an isocyanurate structure, and a boron-containing compound, and the isocyanurate.
  • the content of the compound having a structure is in the range of 0.05 to 10 parts by mass with respect to 100 parts by mass of the base resin, and the content of the boron-containing compound is with respect to 100 parts by mass of the base resin. It is in the range of 10 to 55 parts by mass.
  • the sheath When the flame-retardant ant-proof resin composition according to the present embodiment is applied to a sheath forming the outermost layer of a power cable using this as a raw material, the sheath contains a boron-containing compound, so that the desired flame-retardant performance is achieved.
  • a compound having a low volatile isocyanurate structure is exposed and adhered to the surface of the sheath by bleeding out (exuding) in an amount that covers it thinly, and the state in which this compound is attached is observed.
  • the boron-containing compound contained in the flame-retardant ant-proof resin composition also has ant-proof performance when an ant bites the sheath. Therefore, for example, a compound having an isocyanurate structure exposed and adhered to the sheath can be used.
  • the ant can exert the ant-proof property that occurs when the ant bites the sheath. It is possible to continuously prevent the feeding damage of the power cable. Therefore, even if the sheath of the power cable is made of a single layer by using the flame-retardant ant-proof resin composition according to the present embodiment, it is possible to impart both flame-retardant property and ant-proof property to the power cable. ..
  • the flame-retardant ant-proof resin composition according to the present embodiment includes a base resin (A), a compound (B) having an isocyanurate structure (hereinafter, may be simply referred to as “isocyanurate compound (B)”), and the like. Includes boron-containing compound (C).
  • the base resin (A) is a resin having a solubility parameter (SP value) of 7.1 or more and 11.6 or less.
  • SP value solubility parameter
  • the base resin (A) contains a resin having a solubility parameter (SP value) of 11.6 or less, so that the base resin (A) is used.
  • the isocyanurate compound (B) can be bleeded out.
  • the base resin (A) contains a resin having a solubility parameter (SP value) of 7.1 or more and 11.6 or less, the interaction between the molecules of the base resin (A) is appropriately adjusted. , The isocyanurate compound (B) described later can be gradually bleeded out from the base resin (A) over a long period of time.
  • the base resin (A) is not particularly limited as long as it is a resin having a solubility parameter of 7.1 or more and 11.6 or less.
  • resins include polyolefins containing vinyl resins, diene rubbers, polyamide resins, ethylene-propylene rubbers, ethylene-propylene-diene rubbers, thermoplastic elastomers and the like.
  • polyolefins include polyethylene (SP value: 7.7 to 8.4), polypropylene (SP value: 9.3), polybutene (SP value: 9.4), and polystyrene (SP value: 8). .5 to 10.3), polyester (SP value: 10.7), acrylonitrile styrene resin (SP value: 9.8 to 10.7), ethylene-vinyl acetate copolymer (SP value: 8.8 to 9.
  • Ethylene-ethyl acrylate copolymer (SP value: 9.4), polyisobutylene (SP value: 7.1 to 8.3), polyvinyl chloride (SP value: 9.4 to 10.8), poly Examples thereof include vinyl acetate (SP value: 9.4 to 9.6).
  • diene rubber examples include butyl rubber (SP value: 7.7 to 8.1), butadiene rubber (SP value: 8.1 to 8.6), and chloroprene rubber (SP value: 8.2 to). 9.4), nitrile rubber (SP value: 8.7 to 10.5) and the like can be mentioned.
  • polyamide resin examples include nylon 6 (SP value: 11.6), nylon 66 (SP value: 11.6), nylon 11 (SP value: 10.1), and nylon 12 (SP value:: 9.9) and the like.
  • At least one selected from polyethylene, polypropylene, and polyvinyl chloride is preferable to use at least one selected from polyethylene, polypropylene, and polyvinyl chloride as the base resin (A).
  • the solubility parameter (SP value) of the base resin (A) in the present embodiment is 11.6 or less, preferably 10.8 or less.
  • the difference in solubility parameter with the isocyanurate compound (B) becomes large and the compatibility becomes low, so that the isocyanurate compound (B) is bleeded from the base resin (A). It can be made easier to get out.
  • the lower limit of the solubility parameter (SP value) of the base resin (A) is preferably 7.1 or more in order to gradually release the isocyanurate compound (B) from the base resin (A). .7 or more is more preferable.
  • the base resin (A) only one type of resin having a solubility parameter (SP value) within the above-mentioned appropriate range may be used, but two or more types of resins having a solubility parameter (SP value) within the above-mentioned appropriate range may be used in combination. Good.
  • the base resin (A) is preferably composed only of a resin having a solubility parameter of 7.1 or more and 11.6 or less, but if the mass ratio of the base resin (A) is 10% or less, the solubility is high. It may contain a resin whose parameter is out of the above proper range.
  • Compound (B) having an isocyanurate structure acts as an anti-termite agent and is exposed and adheres to the surface of the flame-retardant termite resin obtained from this composition by bleed-out to prevent termites. Since the resin is protected, it has the effect of effectively reducing the damage caused by ants such as termites to the flame-retardant ant-proof resin.
  • the isocyanurate compound (B) conventionally known compounds can be used, and the isocyanurate compound (B) is not particularly limited, but it is preferable to use a compound represented by the following general formula (I).
  • R 1 to R 3 each independently represent a hydrogen atom, an aliphatic hydrocarbon group, an aryl group or a heterocyclic group.
  • the aliphatic hydrocarbon group constituting R 1 to R 3 of the general formula (I) may be a saturated hydrocarbon group, an unsaturated hydrocarbon group, or a cyclic hydrocarbon group. It may be a group. More specifically, examples of the aliphatic hydrocarbon group include an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group and a cycloalkenyl group, and an alkyl group and an alkenyl group are preferable.
  • the number of carbon atoms contained in the aliphatic hydrocarbon group is preferably 1 to 20, more preferably 1 to 12, further preferably 1 to 8, and particularly preferably 1 to 6.
  • an alkyl group having 1 to 20 carbon atoms and an alkenyl group having 2 to 20 carbon atoms are more preferable.
  • Specific examples of the aliphatic hydrocarbon group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, 2-ethylhexyl group, decyl group, vinyl group, allyl group and isopropenyl.
  • Examples include groups, ethynyl groups, cyclopropyl groups, cyclopentyl groups, cyclohexyl groups and cyclohexenyl groups.
  • the aryl group constituting R 1 to R 3 of the general formula (I) preferably has 6 to 20 carbon atoms, more preferably 6 to 16 carbon atoms, and even more preferably 6 to 10 carbon atoms.
  • Specific examples of the aryl group include a phenyl group and a naphthyl group.
  • the heterocyclic group constituting R 1 to R 3 of the general formula (I) preferably has at least one atom selected from an oxygen atom, a nitrogen atom and a sulfur atom as a constituent atom of the heterocycle.
  • the heterocycle contained in the heterocyclic group may be a saturated ring, an unsaturated ring, or an aromatic ring.
  • the number of carbon atoms of the heterocyclic group is preferably 0 to 20, more preferably 1 to 12.
  • heterocycle contained in the heterocyclic group examples include a tetrahydrofuran ring, a pyrrolidine ring, a piperidine ring, a piperazine ring, a furan ring, a thiophene ring, a pyrrole ring, an imidazole ring, a thiazole ring, and a pyridine ring.
  • R 1 ⁇ R 3 are each a hydrogen atom or an aliphatic hydrocarbon and is preferably group, also aliphatic any is R 1 ⁇ R 3 hydrocarbon groups It is more preferable that R 1 to R 3 are all groups selected from an alkyl group or an alkenyl group, and among them, R 1 to R 3 are further preferably the same group.
  • preferred compounds are trimethylisocyanurate, triethylisocyanurate, tripropylisocyanurate and triallylisocyanurate.
  • triethyl isocyanurate, tripropyl isocyanurate and triallyl isocyanurate are more preferable, and triallyl isocyanurate (that is, 1,3,5-tris (2-propenyl) -1,3,5-triazine-2, 4,6 (1H, 3H, 5H) -trione) is most preferred.
  • the content of the isocyanurate compound (B) needs to be 0.05 parts by mass or more, preferably 0.50 parts by mass or more, with respect to 100 parts by mass of the base resin (A).
  • a compound having an isocyanurate structure having low volatility and anti-termite property is exposed and adheres to the surface of the flame-retardant anti-termite resin produced from the flame-retardant anti-termite resin composition by bleed-out.
  • the flame-retardant ant-proof resin composition is used as the raw material of the sheath, it is possible to reduce the damage caused by ants to the power cable.
  • the upper limit of the content of the isocyanurate compound (B) does not generate white smoke and an organic compound odor when the flame-retardant ant-proof resin composition is extruded, and in consideration of suitability for extrusion processing. It needs to be 10 parts by mass, preferably 5 parts by mass, and more preferably 1 part by mass.
  • the boron-containing compound (C) is a compound having a boron atom in the molecule, which enhances flame retardancy when used as a raw material for sheaths and has anti-termite performance by being a poison to ants such as termites. Has the effect of increasing.
  • the isocyanurate compound (B) is wiped from the surface of the flame-retardant ant-proof resin by using the boron-containing compound (C) in combination with the isocyanurate compound (B). Even when the isocyanurate compound (B) is less expressed due to bleed-out, it is possible to reduce the damage caused by ants to the flame-retardant ant-proof resin.
  • the boron-containing compound (C) includes one or more selected from borate compounds, borates, bosulfides and boronitrides. Among them, it is preferable to use a borate compound, and it is particularly preferable to use zinc borate.
  • the content of the boron-containing compound (C) needs to be 10 parts by mass or more with respect to 100 parts by mass of the base resin (A). Thereby, both the flame-retardant property and the ant-proof property of the flame-retardant ant-proof resin produced from the flame-retardant ant-proof resin composition can be enhanced.
  • the upper limit of the content of the boron-containing compound (C) is such that the boron-containing compound (C) can be uniformly contained in the flame-retardant anti-termite resin composition, and the suitability for extrusion processing is taken into consideration. Therefore, it is necessary to make 55 parts by mass with respect to 100 parts by mass of the base resin (A), 45 parts by mass is more preferable, 35 parts by mass is further preferable, and 20 parts by mass is particularly preferable.
  • the ratio of the content (parts by mass) of the boron-containing compound (C) to the content (parts by mass) of the isocyanurate compound (B) is preferably 1 or more and less than 1000, and is 5 or more and 200 or less. Is more preferable.
  • the flame-retardant ant-proof resin composition is extruded. It is possible to increase the suitability for and to increase the oxygen index of the flame-retardant ant-proof resin composition.
  • the flame-retardant termite resin can be applied to the surface. Bleed-out of a compound having an isocyanurate structure is likely to occur, thereby making it less likely to be harmed by termites.
  • the flame-retardant ant-proof resin composition according to the present embodiment may contain other components, if necessary.
  • the flame-retardant ant-proof resin composition according to the present embodiment may contain one or both of a flame retardant and a flame retardant aid in addition to the above-mentioned boron-containing compound (C).
  • a flame retardant and a flame retardant aid in addition to the above-mentioned boron-containing compound (C).
  • Such flame retardants and flame retardants are not particularly limited, but metal water such as antimony trioxide, polytetrafluoroethylene, silicon dioxide, hydrotalcite, magnesium hydroxide, magnesium hydroxide or calcium hydroxide.
  • Oxide, zinc oxide, aluminum oxide, magnesium oxide, zirconium oxide, vanadium oxide, molybdenum oxide, phosphorus compounds and their surface treatments, melamine, melamine cyanurate, pentaerythritol, dipentaerythritol, tripentaerythritol, polytetrafluoro Examples include ethylene.
  • antimony trioxide and metal hydroxide it is preferable to contain one or both of antimony trioxide and metal hydroxide.
  • the contents of these flame retardants and flame retardant aids may be within a range in which the characteristics of the flame retardant ant-proof resin composition of the present invention are not impaired.
  • the flame-retardant ant-proof resin composition according to the present embodiment is, if necessary, an ultraviolet absorber, a light stabilizer, an antioxidant, a lubricant, a crystal nucleating agent, a softening agent, an antistatic agent, and a metal inactivation.
  • Additives such as agents, antibacterial / antifungal agents, colorants, pigments, dyes, and phosphors may be blended.
  • the method for manufacturing the power cable according to the present embodiment is not particularly limited, and includes, for example, a step of forming a sheath by extruding the above-mentioned flame-retardant ant-proof resin composition on the outer peripheral side of the core wire. As a result, it is possible to obtain a power cable having a sheath formed as an outermost layer on the outer peripheral side of the core wire.
  • a known extrusion-molding means can be used as a means for extrusion-molding the flame-retardant ant-proof resin composition.
  • knead the flame-retardant ant-proof resin composition before extrusion-molding the above-mentioned flame-retardant ant-proof resin composition.
  • a means for kneading the flame-retardant ant-proof resin composition a known means can be used.
  • a means for melting and kneading the base resin (A), the isocyanate compound (B) and the boron-containing compound (C) is used.
  • a means for melting and kneading the base resin (A), the isocyanate compound (B) and the boron-containing compound (C) is used.
  • the kneading of the flame-retardant ant-proof resin composition and the molding of the flame-retardant ant-proof resin do not have to be performed as separate steps.
  • the same device is used to melt the flame-retardant ant-proof resin composition. It may be carried out by kneading / extrusion.
  • the power cable 1 As conceptually shown in FIG. 1, the power cable 1 according to the present embodiment is coated with a sheath 13 formed from the above-mentioned flame-retardant ant-proof resin composition as a raw material on the outer periphery of the core wire 11 as the outermost layer. It is not particularly limited as long as it has an intermediate layer 12 between the core wire 11 and the sheath 13.
  • the power cable 1 can be obtained, for example, by the method described above.
  • an insulating layer 122 is laminated as an intermediate layer on the outer periphery of the conductor which is the core wire 11, and more preferably, the internal semiconductive layer 121 and the inner semiconductive layer 121 are laminated. It is possible that the insulating layer 122, the external semi-conductive layer 123, and the metal shielding layer 124 are laminated in this order, and the sheath 13 is laminated as the outermost layer on the outer periphery thereof.
  • the power cable 1 according to the present embodiment can exhibit desired flame retardancy and anti-termite property, damage may occur in a place where ant feeding damage may occur, a fire caused by ant feeding damage, or a surrounding fire. It can also be suitably laid in a place.
  • the power cable 1 according to the present embodiment can exhibit both desired flame retardancy and anti-termite property even if the sheath 13 is composed of a single layer, and therefore, as compared with a power cable having a sheath composed of two layers. Therefore, since the outer diameter of the power cable can be reduced and the power cable is suitable for extrusion processing, the power cable 1 can be efficiently manufactured.
  • the flame-retardant ant-proof resin composition of the present invention is similar to the power cable of the present invention when applied as a raw material of a sheath constituting the cable. It goes without saying that it can be applied to all cables including communication cables such as optical fiber cables because it can be effective.
  • the power cable 1 according to the present embodiment is laid by a laying method having a step of directly burying it in the ground.
  • Examples 1 and 2 of the present invention A resin composition was obtained by blending polyethylene, triallyl isocyanurate, and zinc borate at the ratios (parts by mass) shown in Table 1, and then this resin composition was obtained using a roll machine set to a kneading temperature of 110 ° C. Was kneaded to produce a resin, and two sheet-shaped samples having different thicknesses were prepared. The two samples were heated to a molding temperature of 120 ° C. and press-molded at a pressure of 11 MPa for 15 minutes to obtain smooth sheets having thicknesses of 2 mm and 3 mm, respectively.
  • Examples 3 to 5 of the present invention After blending polyvinyl chloride, triallyl isocyanurate and zinc borate at the ratios (parts by mass) shown in Table 1 to obtain a resin composition, this resin was prepared using a roll machine set to a kneading temperature of 150 ° C. The composition was kneaded to produce a resin, and two sheet-shaped samples having different thicknesses were prepared. The two samples were heated to a molding temperature of 170 ° C. and press-molded at a pressure of 11 MPa for 15 minutes to obtain smooth sheets having thicknesses of 2 mm and 3 mm, respectively.
  • Example 6 of the present invention A resin composition is obtained by dry-blending pelletized nylon 66, triallyl isocyanurate, and zinc borate at the ratios (parts by mass) shown in Table 1, and then the resin composition is uniaxially used at a kneading temperature of 210 ° C. The resin was produced by kneading by extrusion. The obtained resin was heated to a molding temperature of 220 ° C. and press-molded at a pressure of 11 MPa for 10 minutes to obtain two smooth sheets having thicknesses of 2 mm and 3 mm.
  • Tables 1 and 2 show the average value [%] of the numerical value [%] of the termite damage rate X obtained by the above formula 1.
  • the "harm rate” is preferably small, more specifically 0.03% or less.
  • Example 1 and 2 of the present invention Suitability for extrusion processing
  • the resin compositions obtained in Examples 1 and 2 of the present invention are obtained after kneading the resin compositions using a twin-screw roll machine (manufactured by Otake Seiki Co., Ltd.) set to a kneading temperature of 110 ° C.
  • the resin was processed into pellets by granulating the resin using an extruder (manufactured by IKG, model number: PMS25-25) set to an extrusion temperature of 110 ° C.
  • Examples 3 to 5 of the present invention The resin compositions obtained in Examples 3 to 5 of the present invention are obtained after kneading the resin compositions using a twin-screw roll machine (manufactured by Otake Seiki Co., Ltd.) set to a kneading temperature of 150 ° C.
  • the resin was processed into pellets by granulating it using an extrusion machine (manufactured by IKG, model number: PMS25-25) set to an extrusion temperature of 150 ° C.
  • Example 6 of the present invention The resin composition obtained in Example 6 of the present invention is kneaded with Henschel (FM type manufactured by Nippon Coke Industries Co., Ltd.) set to a kneading temperature of 150 ° C., and then the obtained resin is 210.
  • the pellets were processed by granulation using an extruder (manufactured by IKG, model number: PMS25-25) set to an extrusion temperature of ° C.
  • Comparative Examples 1 to 5 The resin compositions obtained in Comparative Examples 1 to 5 are kneaded with a twin-screw roll machine (manufactured by Otake Seiki Co., Ltd.) set to a kneading temperature of 110 ° C., and then the obtained resin is obtained.
  • a twin-screw roll machine manufactured by Otake Seiki Co., Ltd.
  • the obtained resin is obtained.
  • Comparative Example 6 The resin composition obtained in Comparative Example 6 is kneaded with Henshell (FM type manufactured by Nippon Coke Industries Co., Ltd.) set to a kneading temperature of 150 ° C., and then the obtained resin is 295 ° C. Pellets were processed by granulation using an extruder (manufactured by IKG, model number: PMS25-25) set to the extrusion temperature of.
  • Henshell FM type manufactured by Nippon Coke Industries Co., Ltd.
  • Comparative Example 7 The resin composition obtained in Comparative Example 7 was kneaded with Henshell (FM type manufactured by Nippon Coke Industries Co., Ltd.) set to a kneading temperature of 150 ° C., and then the obtained resin was kneaded at 210 ° C. Pellets were processed by granulation using an extruder (manufactured by IKG, model number: PMS25-25) set to the extrusion temperature of.
  • Henshell FM type manufactured by Nippon Coke Industries Co., Ltd.
  • the base resin (A), the isocyanurate compound (B) and the boron-containing compound (C) having a predetermined SP value are contained, and the isocyanurate compound (B) and the boron are contained.
  • the resin produced from the resin compositions of Examples 1 to 6 of the present invention in which the content of the compound (C) is within the appropriate range of the present invention has a damage rate X of white ants of 0.01% or less and an oxygen index of 0.01% or less. It was confirmed that the content was 25% or more and the suitability for extrusion was evaluated as "A" or "B".
  • Tables 1 and 2 show the ratio of the content (parts by mass) of the boron-containing compound (C) to the content (parts by mass) of the isocyanate compound (B).
  • Tables 1 and 2 show the ratio of the content (parts by mass) of the boron-containing compound (C) to the content (parts by mass) of the isocyanate compound (B).
  • the surface of the resin composition of Comparative Example 6 was 12.2, which was larger than the appropriate range of the present invention, and did not contain the boron-containing compound (C), because the nylon 46 used as the base resin had an SP value of 12.2. No bleed-out was observed, the oxygen index was low, the flame retardancy was inferior, and the evaluation of suitability for extrusion was "C", which was inferior.
  • Comparative Example 7 Since the resin composition of Comparative Example 7 did not contain either the isocyanurate compound (B) or the boron-containing compound (C), the oxygen index was low, no bleed-out was observed on the surface, and flame retardancy was observed. The sex was inferior.
  • Example 7 of the present invention Using the resin composition of Example 2 of the present invention, an inner semi-conductive layer 121, an insulating layer 122, an outer semi-conductive layer 123 and a metal shielding layer are used on the outer periphery of the conductor which is the core wire 11 as shown in FIG. A power cable 1A in which 124s were laminated in order and a sheath 13 was laminated as an outermost layer on the outer periphery thereof was manufactured.
  • a circular compressed conductor made of copper having a cross-sectional area of 800 mm 2 is used as the core wire 11, and an internal semi-conductive layer 121 made of carbon-added cross-linked polyethylene (manufactured by NUC Co., Ltd., model number: NUCV-9563) having a thickness of 1 mm and a thickness thereof are used.
  • an insulating layer 122 made of 11 mm cross-linked polyethylene NUC Co., Ltd., insulating compound NUCV-9253
  • an external semi-conductive layer 123 made of 0.5 mm thick carbon-added cross-linked polyethylene, and a 3 mm thick aluminum metal.
  • the metal shielding layer 124 is provided in order. Then, the resin composition of Example 2 of the present invention was extruded on the outer periphery of the metal shielding layer 124 to cover and form a sheath 13 having a thickness of 5.0 mm.
  • Comparative Example 8 Using the resin composition of Comparative Example 3, a sheath 13 having a thickness of 4 mm was coated on the outer periphery of the metal shielding layer 124 as a flame-retardant sheath, and a polypropylene compound (Idemitsu Lion Composite Co., Ltd.) was formed on the outer periphery of the flame-retardant sheath.
  • a power cable was manufactured in the same manner as in Example 7 of the present invention, except that an anti-termite sheath having a thickness of 1.5 mm made of (trade name) was formed as a coating. At this time, as shown in FIG.
  • the power cable 9 has an internal semi-conductive layer, an insulating layer, an outer semi-conductive layer and a metal shielding layer (not shown) as an intermediate layer 92 between the core wire 91 and the sheath 93. ) Are laminated in order, and the structure of the sheath 93 provided on the outer periphery thereof is a two-layer structure of a flame-retardant sheath 931 and an anti-termite sheath 932.
  • Example 7 and Comparative Example 8 of the present invention The characteristics shown below were evaluated using the power cables according to the above-mentioned Examples 7 and 8 of the present invention. The evaluation conditions for each characteristic are as follows. The results are shown in Table 3.
  • the power cable having a single-layer sheath of Example 7 of the present invention has a combustion length of 1200 mm or less from the burner port, similarly to the power cable having a sheath having a two-layer structure described in Comparative Example 8. And since the residual combustion time was less than 1 hour, it was confirmed that it was compatible with the type 3 vinyl sheath described in JEC3403-2001.
  • the power cable having a single-layer sheath of Example 7 of the present invention has a sheath thickness of 5.0 mm, and has a sheath as compared with the power cable having a two-layer structure sheath described in Comparative Example 8.
  • the sheath material is compared with the sheath of the two-layer structure described in Comparative Example 8. The relative cost of the product was also reduced by about 13%.
  • the power cable of Example 7 of the present invention has flame retardancy equivalent to that of a two-layer structure even if it is a single layer, and the sheath can be made thin to reduce the outer diameter of the power cable. It was confirmed that the production of power cables can also be carried out efficiently.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)
  • Manufacturing Of Electric Cables (AREA)
PCT/JP2020/014949 2019-04-03 2020-03-31 難燃防蟻樹脂組成物、電力ケーブルならびにその製造方法および敷設方法 Ceased WO2020204048A1 (ja)

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JPH0290412A (ja) * 1988-09-28 1990-03-29 Fujikura Ltd 電気ケーブル
JP2012500881A (ja) * 2008-08-29 2012-01-12 アクゾ ノーベル ナムローゼ フェンノートシャップ 難燃性ポリオレフィン組成物
JP2018157637A (ja) * 2017-03-15 2018-10-04 株式会社九電工 地中埋設箱の管接続部の防蟻構造、地中埋設箱の管接続部の防蟻方法、地中埋設箱の管接続部用の防蟻装置、および、地中埋設箱の管接続部用の防蟻具
JP2019070065A (ja) * 2017-10-06 2019-05-09 古河電気工業株式会社 難燃防蟻組成物、電力ケーブルおよびその製造方法

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JP2013213148A (ja) * 2012-04-03 2013-10-17 Sakai Chem Ind Co Ltd 難燃性塩化ビニル系樹脂組成物
JP5808023B2 (ja) * 2013-11-15 2015-11-10 株式会社ジェイ・パワーシステムズ 難燃防蟻ケーブル
CN108299743B (zh) * 2017-01-13 2022-06-21 杭州星庐科技有限公司 橡胶组合物及加工方法与应用，及生产阻燃制品的方法

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JPH0278110A (ja) * 1988-09-12 1990-03-19 Fujikura Ltd 防蟻電線・ケーブル
JPH0290412A (ja) * 1988-09-28 1990-03-29 Fujikura Ltd 電気ケーブル
JP2012500881A (ja) * 2008-08-29 2012-01-12 アクゾ ノーベル ナムローゼ フェンノートシャップ 難燃性ポリオレフィン組成物
JP2018157637A (ja) * 2017-03-15 2018-10-04 株式会社九電工 地中埋設箱の管接続部の防蟻構造、地中埋設箱の管接続部の防蟻方法、地中埋設箱の管接続部用の防蟻装置、および、地中埋設箱の管接続部用の防蟻具
JP2019070065A (ja) * 2017-10-06 2019-05-09 古河電気工業株式会社 難燃防蟻組成物、電力ケーブルおよびその製造方法

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