Abstract: An anti-icing honeycomb core composite manufactured by forming an electromagnetic wave absorption layer by using dielectric fiber, molding the electromagnetic wave absorption layer into a honeycomb core structure by using a molded part including a first base, a second base, and an inner block, hardening the honeycomb core structure, and removing the molded part. The molding step includes first stacking, on the first base including a plurality of grooves in which the inner blocks each having a hexagonal column shape are able to be seated, a plurality of the inner blocks and a plurality of the electromagnetic wave absorption layers as the honeycomb core structure so that the electromagnetic wave absorption layer is disposed between the plurality of inner blocks, and second stacking covering the inner blocks and the electromagnetic wave absorption layers stacked on the first base with the second base having the same shape as the first base.

Abstract: A molding method for a cover window includes: locally heating a peripheral portion of a glass substrate around a central portion of the glass substrate to a temperature of about 610° C. to about 670° C., forming a cover window by pressing the glass substrate, and annealing and cooling the cover window. Accordingly, a cover window in which each of edges has an outwardly convex curved surface through a glass substrate may be formed. In addition, the surface roughness of a cover window formed through a glass substrate may be improved.

Abstract: Provided is an ultra-high-voltage direct-current (DC) power cable. Specifically, the present invention relates to an ultra-high-voltage DC power cable capable of simultaneously preventing or minimizing electric field distortion, a decrease in DC dielectric strength, and a decrease in impulse breakdown strength due to accumulation of space charge in an insulator.

Abstract: Provided is a direct-current (DC) power cable. Specifically, the present invention relates to a DC power cable capable of preventing both a decrease in DC dielectric strength and a decrease in impulse breakdown strength due to space charge accumulation, and reducing manufacturing costs without lowering the extrudability of an insulating layer and the like.

Abstract: Disclosed are an insulation composition that is capable of simultaneously preventing reductions in volume resistance, direct-current dielectric strength, and dielectric breakdown strength due to accumulation of space charges and in which the extent of extrusion of an insulating layer is not reduced, and a direct-current power cable having an insulating layer formed from the same.

Abstract: Disclosed is an ultra-high-voltage direct-current power cable that is capable of simultaneously preventing or minimizing field enhancement and reductions in high-temperature volume resistance and direct-current dielectric strength due to accumulation of space charges in an insulator.

Abstract: Provided is a direct-current (DC) power cable. Specifically, the present invention relates to a DC power cable capable of preventing both a decrease in DC dielectric strength and a decrease in impulse breakdown strength due to space charge accumulation, and reducing manufacturing costs without lowering the extrudability of an insulating layer and the like.

Abstract: Provided is an insulation composition having a low dielectric constant and a cable including an insulation layer formed of the insulation composition. More particularly, the present invention relates to an insulation composition for reducing a space charge to increase superimposed impulse breakdown strength when impulse voltages overlap during application of a direct-current (DC) voltage, having a low dielectric constant, and improving impulse breakdown strength, and a cable including an insulation layer formed of the insulation composition.

Abstract: Provided is an insulation composition having a low dielectric constant and a cable including an insulation layer formed of the insulation composition. More particularly, the present invention relates to an insulation composition for reducing a space charge to increase superimposed impulse breakdown strength when impulse voltages overlap during application of a direct-current(DC) voltage, having a low dielectric constant, and improving impulse breakdown strength, and a cable including an insulation layer formed of the insulation composition.

Abstract: The present invention relates to an insulation composition for a DC power cable and the DC power cable prepared using the same. Specifically, the present invention relates to an improved insulation composition for a DC power cable, which can prevent decrease of DC dielectric strength and decrease of impulse strength caused by accumulation of space charges, and the DC power cable prepared using the same.

Abstract: Provided is a DC power cable including a conductor, an inner semiconductive layer, an insulation and an outer semiconductive layer. In particular, the inner semiconductive layer or the outer semiconductive layer may be formed from a semiconductive composition containing a polypropylene base resin or a low-density polyethylene base resin and carbon nano tubes; and the insulation may be formed from an insulation composition containing a polypropylene base resin or a low-density polyethylene base resin and inorganic nano particles. The resulting power cable may have improved properties such as volume resistivity, hot set, and so on, and excellent space charge reducing effect.

Abstract: The present invention relates to an insulation composition for a DC power cable and the DC power cable prepared using the same. Specifically, the present invention relates to an improved insulation composition for a DC power cable, which can prevent decrease of DC dielectric strength and decrease of impulse strength caused by accumulation of space charges, and the DC power cable prepared using the same.

Abstract: An insulation material composition for a direct current (DC) power cable and the DC power cable using the same are provided. A direct current (DC) power cable insulation material composition includes 0.5 to 5 parts by weight of surface-modified nano-sized cubic magnesium oxide, per 100 parts by weight of a polyethylene base resin.

Abstract: Provided is a DC power cable including a conductor, an inner semiconductive layer, an insulation and an outer semiconductive layer. In particular, the inner semiconductive layer or the outer semiconductive layer may be formed from a semiconductive composition containing a polypropylene base resin or a low-density polyethylene base resin and carbon nano tubes; and the insulation may be formed from an insulation composition containing a polypropylene base resin or a low-density polyethylene base resin and inorganic nano particles. The resulting power cable may have improved properties such as volume resistivity, hot set, and so on, and excellent space charge reducing effect.

Abstract: An insulation material composition for a direct current (DC) power cable and the DC power cable using the same are provided. A direct current (DC) power cable insulation material composition includes 0.5 to 5 parts by weight of surface-modified nano-sized cubic magnesium oxide, per 100 parts by weight of a polyethylene base resin.

Abstract: Disclosed is an insulation resin composition resistant to thermal deformation comprising an ethylene copolymer base resin having crystallinity between 1% and 30%, not including 30%; and 0.5 to 20 parts by weight of an organic peroxide-based crosslinking agent per 100 parts by weight of the base resin, and a cable using the same. The insulation is resistant to thermal deformation that may occur after a crosslinking process under high temperature and high pressure subsequently to extrusion of a sheath.

Abstract: The present invention relates to a peelable and water-crosslinked semiconductive resin composition. The peelable and water-crosslinked semiconductive resin composition includes 100 parts by weight of a basic resin; 20 to 80 parts by weight of carbon black based on weight of the basic resin; and 0.05 to 5.0 parts by weight of an amide-based lubricant based on weight of the basic resin, wherein the basic resin is a mixed resin including 60 to 80 weight % of an ethylene-based copolymer resin that is bonded with an unsaturated organic silane and has a melting point of 80° C. or above; 5 to 20 weight % of an ethylene-acrylic acid copolymer or its alkali metal salt; and 5 to 40 parts by weight of an ethylene propylene copolymer containing 5 to 20 weight % of ethylene, or a propylene rein.

Abstract: The present invention relates to a semiconductive composition and a power cable using the same. The semiconductive composition according to the present invention constituting a semi-conductive layer of a power cable includes 100 parts by weight of a base resin composed of an ethylene-based copolymer resin; 45 to 70 parts by weight of a carbon black; and 0.2 to 5.0 parts by weight of a nonionic surfactant. The semiconductive composition according to the present invention has an improved interfacial smoothness in the semiconductive layer and the insulation layer of the power cable and an increased dielectric breakdown strength of the insulation layer. Also, the semiconductive composition according to the present invention may be useful to ensure an easy cleaning property of a mold upon extruding/molding a power cable.

Abstract: The present invention relates to a composition for manufacturing insulation materials of an electrical wire and an electrical wire manufactured using the same. The composition for manufacturing insulation materials of an electrical wire according to the present invention includes 100 parts by weight of a base resin, made by blending 20 to 70 weight % of any one resin of an unsaturated organosilane grafted polyethylene and an unsaturated organosilane grafted ethylene alpha olefine copolymer, and 30 to 80 weight % of an unsaturated organosilane grafted ethylene copolymer; 10 to 25 parts by weight of a brominated flame retardant; 10 to 50 parts by weight of an inorganic flame retardant; and 0.2 to 5 parts by weight of compound, as a crosslink retardant, represented as a general formula of XnSi(OR)4-n (X is a phenyl group, R is a methyl group and n is an integer of 1 to 3).

Abstract: Disclosed is a composition for producing a halogen-free flame-retardant insulating material using nano-technology. The present invention provides a composition for producing a halogen-free flame-retardant insulating material using nano-technology, including metal hydroxide treated with nanoboric acid; nano clay which is a compatibility enhancer of a base resin; a metal compound which is a flame-retardant formulation; and an antioxidant, based on the total weight of the polyolefin resin.