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KR-20260067498-A - Cold-resistant, highly flame retardant and highly flexible thermoplastic elastomer composition and its application method that ensures economic feasibility for use as a cable's sheath material in polar operating

KR20260067498AKR 20260067498 AKR20260067498 AKR 20260067498AKR-20260067498-A

Abstract

The present invention relates to a thermoplastic elastomer composition with high cold resistance, high flame retardancy, and high flexibility for polar cable sheathing that ensures economic feasibility, and a method of application thereof. More specifically, by maximizing the dispersion characteristics of inorganic fillers, the invention provides a thermoplastic elastomer composition with high cold resistance, high flame retardancy, and high flexibility that can improve electrical, mechanical, and chemical properties and productivity when applied as a sheath for polar-operating ships, while also providing high flame retardancy, excellent flexibility, and cold resistance, even when the content of flame retardant is minimized during the formulation of the thermoplastic elastomer composition.

Inventors

  • 정영섭

Assignees

  • (주)인테크놀로지

Dates

Publication Date
20260513
Application Date
20241105

Claims (5)

  1. In a reactor equipped with a temperature controller, a stirrer, and a gas purging device, while supplying and discharging a purge gas selected from nitrogen, argon, neon, or hydrogen at a rate of 0.5 to 1 L/hour, 1,000 parts by weight of a solvent selected from benzene, toluene, or xylene and 1,200 to 1,600 parts by weight of an antioxidant selected from 2,2,4-trimethyl-1,3-dihydroquinoline or 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline are added, and the mixture is stirred at a speed of 50 to 250 RPM to completely dissolve the components, after which aluminum trichloride (aluminium 80 to 120 parts by weight of a reaction agent selected from titanium trichloride, platinum trichloride, etc., are additionally added and stirred at a speed of 50 to 250 RPM for 2 to 6 hours at 90 to 120°C; after stopping the stirring, 1,000 to 1,400 parts by weight of an aqueous solution obtained by dissolving 200 to 400 parts by weight of a strong base selected from salts of lithium hydroxide, sodium hydroxide, or potassium hydroxide in 800 parts by weight of distilled water is added to the reactor to neutralize the catalyst; the aqueous layer separated into solution and aqueous layers is removed, and the resulting upper solution layer is vacuum dried at 110 to 140°C and 0.01 to 0.02 atm to produce an anti-aging polymer. Anti-aging agent polymerization step and; 10,000 parts by weight of octamethyltetrasiloxane, 50 to 120 parts by weight of decamethyltetrasiloxane, and 5 to 20 parts by weight of polydimethylsiloxane oil are added to a reactor equipped with a stirrer, a temperature controller, a dropping funnel, and nitrogen purging equipment, and the reaction is carried out for 1 to 5 hours while maintaining the reactor temperature at 120 to 170°C. When the reaction is complete, the reactor temperature is lowered to 70 to 90°C, and then 50 to 120 parts by weight of polydimethylsiloxane oil, 0.5 to 2 parts by weight of phosphonitrilic chloride, and 0.5 to 2 parts by weight of potassium silanolate are added to the reaction solution, and for 0.5 to 4 hours A silicone rubber manufacturing step of stirring at a speed of 10 to 100 RPM, and after stirring is finished, adding 50 to 200 parts by weight of methylhydrosiloxane and 50 to 200 parts by weight of silica to the reactants and stirring at a speed of 50 to 500 RPM for 1 to 4 hours to produce hydrogen siloxane copolymers; In a continuous flow reactor equipped with a stirrer and temperature controller, while continuously supplying and discharging purge gas at a rate of 1–10 L/hour, a polymerization solvent selected from hexane, heptane, octane, nonane, or decane at a rate of 20,000–25,000 g/hour, ethene at a rate of 1,000–4,000 g/hour, or an alkene monomer selected from linear alkenes among butene, pentene, hexene, octene, and nonene at a rate of 100–1,000 g/hour is supplied, along with bis(indenyl)hafnium dichloride or bis(isopropylcyclopentadienyl)hafnium Dichloride [bis(isopropylcyclopentadienyl)hafnium dichloride], bis(2-methyl-4,5,6,7-tetrahydroindenyl)hafnium dichloride [bis(2-methyl-4,5,6,7-tetrahydroindenyl)hafnium dichloride], racemic-ethylenebis(indenyl)hafnium dichloride [rac-ethylenebis(indenyl)hafnium dichloride], racemic-[ethylenebis(2-(tert-butyldimethylsiloxy)indenyl)]hafnium dichloride {rac-[ethylenebis(2-(tert-butyldimethylsiloxy)indenyl)]hafnium dichloride}, racemic-dimethylsilanediylbis(2-methyl-4-(1-naphthyl)indenyl)hafnium dichloride [rac-dimethylsilanediylbis(2-methyl-4-(1- A polymerization catalyst selected from rac-dimethylsilanediylbis[2-methyl-4-(1-naphthyl)indenyl]hafnium dichloride, racemic-dimethylsilanediylbis[2-methyl-4-(1-naphthyl)indenyl]hafnium dichloride, racemic-dimethylsilanediylbis[2-methyl-4-(1-naphthyl)-4,5,6,7-tetrahydroindenyl]hafnium dichloride, 0.01–0.2 mmol/hour, and methylaluminoxane, A copolymer manufacturing step comprising: introducing an auxiliary catalyst selected from organic aluminoxanes among methylisobutylalumoxane at a rate of 0.01 to 1.2 mmol/hour to carry out a polymerization reaction for 4 to 24 hours while maintaining a reactor pressure of 1.2 to 2.4 atm and a temperature of 80 to 110℃, and after the reaction is completed, adding alcohol to the polymerization reaction solution extracted from the bottom of the continuous reactor to terminate the reaction mixture, treating the reaction mixture by steam stripping to separate the copolymer from the solvent, and then drying the copolymer under reduced pressure at 60 to 100℃ for 12 to 48 hours; A flame retardant additive manufacturing step comprising maintaining the feeder temperature of a twin extruder at 40–60°C and raising the internal temperature of the extruder equipped with a screw to 80–160°C, first introducing 10,000 parts by weight of the copolymer prepared in the copolymer manufacturing step into the feeder and melting it, then introducing 100–500 parts by weight of a lubricant selected from calcium stearate or metal stearates among magnesium stearate, sodium stearate, and zinc stearate, and 14,000–25,000 parts by weight of red phosphorus and mixing for 10–60 minutes, and then cutting through a melt extrusion molding process to manufacture a flame retardant additive having a size of approximately 2–5 mm; In a mixing mixer such as a ribbon, kneader, Henschel, or Banbury, 10,000 parts by weight of a polyethylene resin selected from high-density polyethylene, medium-density polyethylene, linear low-density polyethylene, and low-density polyethylene, 8,000 to 14,000 parts by weight of an ethylene block copolymer selected from ethylene-butene block copolymer, ethylene-hexene block copolymer, and ethylene-octene block copolymer, 26,000 to 32,000 parts by weight of the copolymer prepared in the copolymer manufacturing step, tetramethoxysilane, or 40,000 to 80,000 parts by weight of a metal hydrate flame retardant selected from magnesium hydroxide phosphate, aluminum hydroxide, and magnesium hydroxide, surface-treated with a silane selected from methyltrimethoxysilane, propyltrimethoxysilane, tetraethoxysilane, and methyltriethoxysilane, or a fatty acid selected from lauric acid, behenic acid, docosahexaenoic acid, palmitic acid, and stearic acid; in the silicone rubber manufacturing step 1,000 to 1,500 parts by weight of a manufactured siloxane polymer, 3,000 to 3,500 parts by weight of an aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer having an aminoethylaminopropylmethylsiloxane content of 1 to 30 wt%, and 80 to 140 parts by weight of a siloxane additive used alone or in a mixture of two or more types of cyclosiloxanes among hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane. octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H, 3H, 5H)-trione[1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione], 4,4',4''-(1-methylpropanyl-3-ylidene)tris(6-tert-butyl-meta-cresol)[4,4',4''-(1-methylpropanyl-3-ylidene)tris(6-tert-butyl-m-cresol)], 6,6'-di-tert-butyl-4,4'-butylidenedi-meta-cresol[6,6'-di-tert-butyl-4,4'-butylidenedi-m-cresol], 400 to 800 parts by weight of an antioxidant selected alone or in two or more of 1,3,5-tris(3,5-di-tert-butyl-4-hydroxyphenylmethyl)-2,4,6-trimethylbenzene, 150 to 450 parts by weight of an anti-aging polymer prepared in the anti-aging polymerization step, 100 to 400 parts by weight of a lubricant, 1,500 to 2,000 parts by weight of a pigment selected alone or in two or more of iron oxide, carbon black, or titanium dioxide, and 3,000 to 6,000 parts by weight of a flame retardant additive prepared in the flame retardant additive manufacturing step are sequentially added at 80 to 140°C A step for manufacturing a cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition by melt-mixing at a temperature for 10 to 60 minutes; An economically viable cold-resistant, highly flammable, and highly flexible thermoplastic elastomer composition for polar cable sheathing, characterized by being manufactured by transferring a lump dough of the cold-resistant, highly flammable, and highly flexible thermoplastic elastomer composition produced in the above-mentioned cold-resistant, highly flammable, and highly flexible thermoplastic elastomer composition manufacturing step to a single or twin extruder to produce composition pellets of a size of 2 to 5 mm through extrusion molding, and then drying in an oven at 60 to 80°C and undergoing a pelletizing and sorting step to sort particle sizes.
  2. In a mixing mixer among Kneder, Henschel, or Banbury, 100,000 parts by weight of an ethylene polymer or ethylene copolymer selected from polyethylene, ethylene-propylene copolymer, or ethylene-propylene-diene copolymer; 60,000 to 100,000 parts by weight of a metal hydrate flame retardant surface-treated with silane or fatty acid; 100 to 12,000 parts by weight of a reinforcing agent selected from silica, carbon black, magnesium carbonate, aluminum silicate, magnesium silicate, and diatomaceous earth; thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] or, 50 to 200 parts by weight of an antioxidant, used alone or in a mixture of two or more types selected from thiodipropionic acid dioctadecyl ester, distearyl thiodipropionate, and sulfur compounds in 3-mercaptopropionic acid, and 100 to 1,200 parts by weight of a metal stearate lubricant are sequentially added, and a lump dough is kneaded at a temperature of 80 to 130°C for 5 to 60 minutes. The resulting dough is then transferred to a single-screw or twin-screw extruder to produce insulating composition pellets of 3 to 5 mm in size through extrusion molding. Subsequently, the insulating composition pellets and a crosslinking agent selected from organic peroxide or irradiation crosslinking agent are placed in a separate kneader or a mixing mixer such as a Henschel or Banbury. A step for manufacturing a cross-linked insulating composition, wherein 1,000 to 20,000 parts by weight are added and kneaded at a temperature of 60 to 100°C for 10 to 60 minutes to produce cross-linked insulating composition pellets; An insulated wire manufacturing step in which the cross-linked insulating composition pellets produced in the above cross-linked insulating composition manufacturing step are fed into a hopper, and then a conductor made of a metal wire, a metal-plated wire, or a metal alloy wire is passed through the head of an extruder equipped with an extrusion die, while extruding and vulcanizing at a speed of 10 to 40 kg/hour under temperature conditions where cylinder 1 is 100 to 120°C, cylinder 2 is 100 to 120°C, cylinder 3 is 105 to 125°C, the extrusion head is 110 to 130°C, and the extrusion die is 110 to 130°C, thereby manufacturing an insulated wire having an insulating layer formed thereon; A multiply wire manufacturing step for manufacturing a multiply wire by stranding the insulated wires manufactured in the above insulated wire manufacturing step using a multiply wire assembly machine; A joint shielding layer forming step for forming a combined wire with a joint shielding layer formed by passing a filler, which is a polymer fiber yarn composed of polypropylene or nylon and serves to maintain the concentricity of the combined wire and the insulated wire manufactured in the above combined wire manufacturing step, together with the filler, and taping the outer circumference with a metal tape or metal coating film, or braiding with a metal wire, metal-plated wire, or alloy wire; A taping step of passing the combined wire with the joint shielding layer formed thereon, manufactured in the joint shielding layer formation step, through the taping column of a cable taping machine and taping it with a binder tape selected from polymer tapes; An inner coating layer forming step in which a cold-resistant, high-flame-retardant, and high-flexibility thermoplastic elastomer composition obtained in claim 1 is extruded at a speed of 5 to 50 kg/hour to form an inner coating layer in an extruder having a molding die attached to the outer circumference of an insulated wire having a binder tape layer formed in the above taping step; An external reinforcement layer forming step in which a reinforcement layer is formed on the outer circumference of an insulated wire having an internal coating layer formed in the above internal coating layer forming step, by combining and braiding one or more types of metal wire, inorganic fiber yarn, or aramid fiber yarn; A method for applying a cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition for polar cable sheathing that ensures economic efficiency, characterized by manufacturing a polar ship cable through an external sheathing layer formation step in which an external sheathing layer is formed by extruding the cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition obtained in claim 1 at a speed of 5 to 50 kg/hour in an extruder in which an extrusion molding die is attached to the outer circumference of an insulated wire having a reinforcing layer formed in the above external reinforcing layer formation step.
  3. 10,000 parts by weight of an ethylene copolymer, 500 to 2,000 parts by weight of an electro-conductive filler selected from electro-conductive carbon black, carbon nanotubes, graphite, or graphene, 43 to 64 parts by weight of an antioxidant, and 25 to 40 parts by weight of a metal stearate activator are sequentially added to a mixing mixer among a kneader, Henschel, or Banbury, and kneaded for 10 to 60 minutes at a temperature of 100 to 140°C. The resulting dough is then transferred to a single-screw or twin-screw extruder to produce semiconductive elastomer pellets of 3 to 5 mm in size with a surface resistance of 10⁵ to 10⁸ Ω through extrusion molding, and the semiconductive elastomer pellets are then transferred to a separate mixing mixer among a kneader, Henschel, or Banbury. A step for preparing a cross-linked semiconducting composition, wherein 10,568 to 12,104 parts by weight and 95 to 150 parts by weight of an organic peroxide are added and kneaded at a temperature of 60 to 100°C for 10 to 60 minutes to produce cross-linked semiconducting composition pellets; An insulated wire manufacturing step in which the cross-linked insulating composition pellets produced in the above cross-linked insulating composition manufacturing step are fed into a hopper, and then a conductor made of a metal wire, a metal-plated wire, or a metal alloy wire is passed through the head of an extruder equipped with an extrusion die, while extruding and vulcanizing at a speed of 10 to 40 kg/hour under temperature conditions where cylinder 1 is 100 to 120°C, cylinder 2 is 100 to 120°C, cylinder 3 is 105 to 125°C, the extrusion head is 110 to 130°C, and the extrusion die is 110 to 130°C, thereby manufacturing an insulated wire having an insulating layer formed thereon; A shielding layer formation step in which a shielding layer is formed by taping the outer circumference of an insulated wire having a semiconducting layer formed in the above-mentioned insulated wire manufacturing step with a semiconducting layer, using a metal tape or a metal coating film, or by braiding it with a metal wire or a metal wire; A taping step of taping with binder tape while passing an insulated wire with multiple combined shielding layers and a filler together through a taping column of a cable taping machine; an inner coating layer forming step of forming an inner coating layer by extruding a thermoplastic elastomer composition with cold resistance, high flame retardancy, and high flexibility obtained in claim 1 at a speed of 5 to 50 kg/hour in an extruder to which a molding die is attached to the outer circumference of the insulated wire with the binder tape layer formed in the taping step; and an outer reinforcing layer forming step of forming a reinforcing layer by combining and braiding one or more types of metal wire, inorganic fiber yarn, or aramid fiber yarn to form a reinforcing layer on the outer circumference of the insulated wire with the inner coating layer formed in the inner coating layer forming step; A method for applying a cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition for polar cable sheathing that ensures economic feasibility, characterized by manufacturing a polar vessel cable through an external sheathing layer formation step in which an external sheathing layer is formed by extruding the cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition obtained in claim 1 at a speed of 5 to 50 kg/hour in an extruder having an extrusion molding die attached to the outer circumference of an insulated wire having a reinforcing layer formed in the above external reinforcing layer formation step, thereby forming an external sheathing layer.
  4. 10,000 parts by weight of an ethylene copolymer, 500 to 2,000 parts by weight of an electro-conductive filler selected from electro-conductive carbon black, carbon nanotubes, graphite, or graphene, 43 to 64 parts by weight of an antioxidant, and 25 to 40 parts by weight of a metal stearate activator are sequentially added to a mixing mixer among a kneader, Henschel, or Banbury, and kneaded for 10 to 60 minutes at a temperature of 100 to 140°C. The resulting dough is then transferred to a single-screw or twin-screw extruder to produce semiconductive elastomer pellets of 3 to 5 mm in size with a surface resistance of 10⁵ to 10⁸ Ω through extrusion molding, and the semiconductive elastomer pellets are then transferred to a separate mixing mixer among a kneader, Henschel, or Banbury. A step for preparing a cross-linked semiconducting composition, wherein 10,568 to 12,104 parts by weight and 95 to 150 parts by weight of an organic peroxide are added and kneaded at a temperature of 60 to 100°C for 10 to 60 minutes to produce cross-linked semiconducting composition pellets; An insulated wire manufacturing step in which the cross-linked insulating composition pellets produced in the above cross-linked insulating composition manufacturing step are fed into a hopper, and then a conductor made of a metal wire, a metal-plated wire, or a metal alloy wire is passed through the head of an extruder equipped with an extrusion die, while extruding and vulcanizing at a speed of 10 to 40 kg/hour under temperature conditions where cylinder 1 is 100 to 120°C, cylinder 2 is 100 to 120°C, cylinder 3 is 105 to 125°C, the extrusion head is 110 to 130°C, and the extrusion die is 110 to 130°C, thereby manufacturing an insulated wire having an insulating layer formed thereon; An external semiconducting layer formation step in which an external semiconducting layer is formed on the outer circumference of an insulated wire manufactured in the insulated wire manufacturing step by extrusion vulcanization of the cross-linked semiconducting composition manufactured in the cross-linked semiconducting composition manufacturing step; A watertight layer formation step for manufacturing an insulated wire having a watertight layer formed thereon by continuously supplying and taping a superabsorbent nonwoven tape composed of a superabsorbent polymer among partially cured polyacrylic acid, sodium polyacrylate, polyacrylic amide, and poly(vinyl alcohol), and a Mylar tape coated with a metal among copper or aluminum, to the outer circumference of the insulated wire having an external semiconducting layer formed thereon manufactured in the above external semiconducting layer formation step; A metal sheath layer forming step for manufacturing an insulated wire with a metal sheath formed by taping the outer circumference of the insulated wire with the watertight layer formed in the above watertight layer forming step with a metal tape or by extruding with metal; A coating layer forming step in which a coating layer is formed by extruding a cold-resistant, high-flame-retardant, and high-flexibility thermoplastic elastomer composition obtained in claim 1 at a speed of 4 to 45 kg/hour in an extruder having an extrusion molding die attached to the outer circumference of an insulated wire having a metal outer layer formed in the above metal outer layer forming step; A serving layer forming step for manufacturing an insulated wire having a serving layer formed thereon by taping the outer circumference of the insulated wire having a coating layer formed thereon, manufactured in the coating layer forming step, with a tape coated with a bitumen selected from natural tar, bitumen, oxidized bitumen, or a bitumen derivative; A method of applying an economically viable thermoplastic elastomer composition for polar cable sheathing that is cold-resistant, highly flame-retardant, and highly flexible, characterized by manufacturing a polar submarine cable through a reinforcing layer formation step in which a reinforcing layer is formed by braiding a fiber composed of polypropylene or nylon onto the outer circumference of an insulated wire having a serving layer formed in the above serving layer formation step.
  5. In a mixing mixer among Kneder, Henschel, or Banbury, 100,000 parts by weight of an ethylene polymer or ethylene copolymer selected from polyethylene, ethylene-propylene copolymer, or ethylene-propylene-diene copolymer; 60,000 to 100,000 parts by weight of a metal hydrate flame retardant surface-treated with silane or fatty acid; 100 to 12,000 parts by weight of a reinforcing agent selected from silica, carbon black, magnesium carbonate, aluminum silicate, magnesium silicate, and diatomaceous earth; thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] or, 50 to 200 parts by weight of an antioxidant, used alone or in a mixture of two or more types selected from thiodipropionic acid dioctadecyl ester, distearyl thiodipropionate, and sulfur compounds in 3-mercaptopropionic acid, and 100 to 1,200 parts by weight of a metal stearate lubricant are sequentially added, and a lump dough is kneaded at a temperature of 80 to 130°C for 5 to 60 minutes. The resulting dough is then transferred to a single-screw or twin-screw extruder to produce insulating composition pellets of 3 to 5 mm in size through extrusion molding. Subsequently, the insulating composition pellets and a crosslinking agent selected from organic peroxide or irradiation crosslinking agent are placed in a separate kneader or a mixing mixer such as a Henschel or Banbury. A step for manufacturing a cross-linked insulating composition, wherein 1,000 to 20,000 parts by weight are added and kneaded at a temperature of 60 to 100°C for 10 to 60 minutes to produce cross-linked insulating composition pellets; To a silicone rubber composition uniformly blended by adding 10,000 parts by weight of gum-like polysiloxane containing 1 to 20 mol% of methyl vinyl siloxane or vinyl dimethyl siloxane to a two-roller mill, milling for 10 to 30 minutes to impart plasticity, then sequentially adding 3,000 to 5,000 parts by weight of fumed silica, 8,000 to 12,000 parts by weight of a flame retardant surface-treated with silane prepared in the flame retardant surface treatment step, and 300 to 500 parts by weight of silicone oil, and milling for 30 to 60 minutes, 2,4-dichlorobenzoyl peroxide or A step for preparing a cross-linked silicone rubber composition, wherein 80 to 120 parts by weight of a peroxide selected from peroxides among bis(2-dimethylbenzoyl)peroxide and bis(3-dimethylbenzoyl)peroxide are added and milled for 5 to 30 minutes to obtain a cross-linked silicone rubber composition; An insulated wire manufacturing step in which the cross-linked insulating composition pellets produced in the above cross-linked insulating composition manufacturing step are fed into a hopper, and then a conductor made of a metal wire, a metal-plated wire, or a metal alloy wire is passed through the head of an extruder equipped with an extrusion die, while extruding and vulcanizing at a speed of 10 to 40 kg/hour under temperature conditions where cylinder 1 is 100 to 120°C, cylinder 2 is 100 to 120°C, cylinder 3 is 105 to 125°C, the extrusion head is 110 to 130°C, and the extrusion die is 110 to 130°C, thereby manufacturing an insulated wire having an insulating layer formed thereon; A multiply wire manufacturing step for manufacturing a multiply wire by stranding the insulated wires manufactured in the above insulated wire manufacturing step using a multiply wire assembly machine; A bedding layer formation step in which the bundled wire manufactured in the above bundled wire manufacturing step is passed through an extruder equipped with a molding die, and the cross-linked silicone rubber composition manufactured in the cross-linked silicone rubber composition manufacturing step is extruded onto the outer circumference of the bundled wire at a speed of 5 to 50 kg/hour, and then passed through a heater box maintained at a temperature of 350 to 500°C to form a bedding layer; A taping step of forming a taping layer with a binder tape selected from polymer tapes while passing the bundled wire having the bedding layer formed in the above bedding layer formation step through the taping column of a taping machine; A reinforcing layer forming step in which a reinforcing layer is formed by braiding a metal wire selected from metal-plated copper wire, nickel wire, copper-clad steel wire, or iron wire onto the outer circumference of the bundled strand wire having a taping layer formed in the above taping step; A cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition for polar cable sheathing with ensured economic efficiency and a method of application thereof, characterized by manufacturing a polar engine cable through a sheathing layer formation step in which an outer sheathing layer is formed by extruding the cold-resistant, high-flame-retardant, and high-flexible thermoplastic elastomer composition obtained in claim 1 at a speed of 5 to 60 kg/hour in an extruder in which an extrusion molding die is attached to the outer circumference of a bundled strand wire having a reinforcing layer formed in the reinforcing layer formation step above.

Description

Cold-resistant, highly flame retardant, and highly flexible thermoplastic elastomer composition for polar cable sheathing and its application method that ensures economic feasibility for use as a cable's sheath material in polar operating The present invention relates to a thermoplastic elastomer composition with high cold resistance, high flame retardancy, and high flexibility for polar cable sheathing that ensures economic feasibility, and a method of application thereof. More specifically, it relates to a thermoplastic elastomer composition with high cold resistance, high flame retardancy, and high flexibility for polar cable sheathing that ensures economic feasibility and a method of application thereof, which can improve electrical, mechanical, chemical properties, and productivity when applied as a sheath for polar cables, while maintaining high flame retardancy, excellent flexibility, and cold resistance, even when the content of flame retardant is minimized during the formulation of the thermoplastic elastomer composition by maximizing the dispersion characteristics of inorganic fillers. Recently, due to global warming, the sea ice area in the polar waters of the Arctic and Antarctic has expanded and the ice-free period during which navigation is possible without icebreakers has become longer, increasing the possibility of using the Arctic route. As such, the reduction in Arctic sea ice is having a significant impact on the global environmental system, but from the perspective of the shipbuilding and marine industry, the opening of the Arctic shipping route during the summer can lead to demand for new ice-sea vessels or polar offshore plants, providing new opportunities. Consequently, the demand for cables capable of withstanding extreme temperatures is increasing, and the required level of technology is also rising. Therefore, the market for cable sheath materials for specialized vessels is advancing globally as the types of high-value-added special-purpose ships expand. This is because the polymer materials primarily used for flame-retardant wires in conventional offshore plant facilities and ships are of the crosslinked polyolefin type, which possess economic efficiency and stability. Crosslinking is the process of connecting polymer chains; generally, it has the effect of increasing the molecular weight of the polymer and improving its physical properties. However, cross-linked polyolefin resins have the disadvantage that they transform into insoluble and infusible resins even when heat is applied later, making recycling impossible. In addition, cables used on ships equipped with crude oil and gas production facilities or special polar vessels must maintain cold flexibility even in extreme marine environments such as the polar regions, while also possessing resistance to heat, oil vapor, and ozone generated beneath the ship's deck. In addition, these cable materials must not contain halogen elements, and must be flame-retardant and self-extinguishing. Thermoplastic elastomers are considered one of the most versatile plastics on the market due to their design and manufacturing flexibility. Thermoplastic elastomers possess the processing advantages of thermoplastic resins and the performance characteristics of elastomers, allowing them to be processed relatively easily using thermoplastic methods such as extrusion and injection molding, and offering the advantage of being recyclable. Thermoplastic elastomers do not require vulcanization crosslinking, a time-intensive rubber processing method, and additionally possess high elastic properties due to the characteristics of their molecular structure, which consists of crystalline and amorphous domains. However, regarding the development of high-performance thermoplastic olefin materials that do not require such crosslinking, most foreign countries have secured technological competitiveness and preempted the relevant market. Consequently, the market entry barriers perceived by domestic compounding companies are relatively high, making it urgent to develop core technologies that ensure economic viability in this field domestically. To improve these characteristics, the prior art and patent literature developed and patented to date are as follows. FIG. 1 is a process flow diagram illustrating a method for implementing a cold-resistant, high-flame-retardant, and high-flexibility thermoplastic elastomer composition of the present invention. FIG. 2 is a process flow diagram illustrating a method of implementing a cable for a polar navigation vessel according to the present invention. FIG. 3 is a process flow diagram illustrating a method of implementing a cable for a polar navigation vessel according to another aspect of the present invention. FIG. 4 is a process flow diagram illustrating a method of implementing a polar submarine cable according to the present invention. FIG. 5 is a process flow diagram illustrating a method of implementing the polar engin