Abstract: A steel for a gear includes, based on a total weight of the steel: C: 0.10-0.30 wt %, Si: 0.60-0.80 wt %, Mn: 0.25-0.75 wt %, Cr: 1.80-2.20 wt %, Ni: 0.50-1.50 wt %, Mo: 0.20-0.40 wt %, Nb: 0.025-0.050 wt %, V: 0.030-0.050 wt %, and a balance of Fe and inevitable impurities, wherein contents of Nb and V satisfy the following <Relationship Formula 1>: 0.055<[Nb]+[V]<0.100??<Relationship Formula 1>, wherein [Nb] represents a content of Nb and [V] represents a content of V.

Abstract: Disclosed are a backside illuminated image sensor and a method of manufacturing the same. More particularly, a backside illuminated image sensor and a method of manufacturing the backside illuminated image sensor include a plurality of sequential layers have different refractive indexes to extend a path of incident light passing through a lens, thereby increasing sensitivity.

Abstract: A steel for a gear includes, based on a total weight of the steel: C: 0.10-0.30 wt %, Si: 0.60-0.80 wt %, Mn: 0.25-0.75 wt %, Cr: 1.80-2.20 wt %, Ni: 0.50-1.50 wt %, Mo: 0.20-0.40 wt %, Nb: 0.025-0.050 wt %, V: 0.030-0.050 wt %, and a balance of Fe and inevitable impurities, wherein contents of Nb and V satisfy the following <Relationship Formula 1>: 0.055<[Nb]+[V]<0.100??<Relationship Formula 1>, wherein [Nb] represents a content of Nb and [V] represents a content of V.

Abstract: The present disclosure relates to a steel and a method for manufacturing the steel. Specifically, the present disclosure is characterized by providing a method for providing optimal alloy components that can reduce carburizing thermal deformation by reducing contents of Cr and Mo elements compared to the existing ones, and improving the physical property with fatigue resistance of a carburized steel by adjusting a rolling thermal treatment temperature, a carburizing thermal treatment condition, and the like to increase a fraction of a fine MX precipitate and improve a precipitation strengthening effect.

Abstract: A steel for a gear includes, based on a total weight of the steel: C: 0.10-0.30 wt %, Si: 0.60-0.80 wt %, Mn: 0.25-0.75 wt %, Cr: 1.80-2.20 wt %, Ni: 0.50-1.50 wt %, Mo: 0.20-0.40 wt %, Nb: 0.025-0.050 wt %, V: 0.030-0.050 wt %, and a balance of Fe and inevitable impurities, wherein contents of Nb and V satisfy the following <Relationship Formula 1>: 0.055<[Nb]+[V]<0.100??<Relationship Formula 1>, wherein [Nb] represents a content of Nb and [V] represents a content of V.

Abstract: Provided is a method of manufacturing a carbon fiber sheet molding compound, the method including: performing sizing treatment on a carbon fiber using a sizing agent; cutting the sizing-treated carbon fiber into pieces; spraying the pieces of carbon fiber onto a first resin coated on a surface of a first carrier sheet; and uniting together a second resin coated on a second carrier sheet and a surface of the first resin, wherein the sizing agent, the first resin, and the second resin include the same compounds.

Abstract: Provided is a method of manufacturing a carbon fiber sheet molding compound, the method including: performing sizing treatment on a carbon fiber using a sizing agent; cutting the sizing-treated carbon fiber into pieces; spraying the pieces of carbon fiber onto a first resin coated on a surface of a first carrier sheet; and uniting together a second resin coated on a second carrier sheet and a surface of the first resin, wherein the sizing agent, the first resin, and the second resin include the same compounds.

Abstract: Disclosed is a chip through flooring material using a PLA resin, which is environmentally friendly by using the PLA resin and can realize the texture of natural wood and the unique fragrance of trees. According to the present invention, the chip through flooring material using the PLA resin includes: a chip through layer; and a surface treatment layer which is formed on a surface of the chip through layer, wherein the chip through layer includes the PLA resin.

Abstract: Disclosed is a flooring material using an environment-friendly PLA resin. According to the present invention, the flooring material using the PLA resin comprises: a base layer; a print layer which is formed on top of the base layer, and has a print pattern on an upper side thereof; and a transparent layer which is formed on top of the print layer, wherein one or more of the base layer, the print layer, and the transparent layer include polylactic acid (PLA) resin.

Abstract: The present invention relates to a foam sheet using cross-linked polylactic acid and method of manufacturing the same, and more particularly a foam sheet using cross-linked polylactic acid and method of manufacturing the same with not only excellent waterproofing and workability but also relatively high foaming ratio and a uniform closed foam cell structure, by producing cross-linked polylactic acid resin in a fixed condition using composites comprising polylactic acid, cross linking agents, and/or co-crosslinking agents, and then forming a sheet shape in a fixed condition using composites comprising the cross-linked polylactic acid and foaming agents, and then foaming at relatively high temperature conditions.

Abstract: Disclosed is a foam sheet using polylactic acid, which provides the advantages of energy reduction and greenhouse gas reduction, and does not emit toxic substances such as toxic gas or endocrine-disrupting chemicals. The foam sheet, according to the present invention, comprises at least one resin layer comprising a biodegradable resin composition including the polylactic acid having an extended chain, a plasticizer, and a foaming agent, and thus provides the advantages of superior processing properties, superior water resistance after processing, energy reduction and greenhouse gas reduction, and of not emitting toxic substances such as toxic gas or endocrine-disrupting chemicals.

Abstract: Disclosed herein is a chip inlaid flooring material using a PLA resin. The chip inlaid flooring material includes a chip inlaid layer, a dimension stabilizing layer, and a base layer, from the top of the flooring material, wherein at least one of the chip inlaid layer and the base layer includes polylactic acid (PLA) resin as a binder.

Abstract: Disclosed herein is a board for building or industry comprising biodegradable resin and wooden flour, which is capable of implementing an excellent physical property and protecting the human body and the environment, and a method of manufacturing the same. A method of manufacturing a board may comprise fabricating wooden flour by pulverizing a raw log or wood chips that are raw materials, inputting biodegradable resin to the wooden flour and fabricating compounds by mulling the biodegradable resin and the wooden flour at high temperature, forming the fabricated compounds in a sheet form through mold forming, and cooling the formed board. Accordingly, there are advantages in that an excellent physical property can be implemented, the human body and the environment can be protected because there is no possibility of environmental pollution when the board is buried due to the biodegradable resin, and a cost related to the disposal of wastes can be reduced.

Abstract: Disclosed is a foam sheet using polylactic acid, which provides the advantages of energy reduction and greenhouse gas reduction, and does not emit toxic substances such as toxic gas or endocrine-disrupting chemicals. The foam sheet, according to the present invention, comprises at least one resin layer comprising a biodegradable resin composition including the polylactic acid having an extended chain, a plasticizer, and a foaming agent, and thus provides the advantages of superior processing properties, superior water resistance after processing, energy reduction and greenhouse gas reduction, and of not emitting toxic substances such as toxic gas or endocrine-disrupting chemicals.

Abstract: Disclosed are an environmentally-friendly board, which provides the advantages of energy reduction and greenhouse gas reduction and does not emit toxic substances such as toxic gas or endocrine-disrupting chemicals, and a method for preparing same. The environmentally-friendly board, according to the present invention, comprises a biodegradable resin composition including a polylactic acid resin, a crosslinking agent, and wood fiber, and thus provides the advantages of not emitting toxic substances such as toxic gas or endocrine-disrupting chemicals, securing water resistance of a product by PLA crosslinking, and not sticking to a processing tool when heat is applied during processing.

Abstract: The present invention relates to a board using crosslinked polylactic acid and a method for preparing same, and more specifically, to a board using the crosslinked polylactic acid having superior processing properties during the preparation process and water resistance properties after processing by using a composition comprising the crosslinked polylactic acid and wood powder, and to a method for preparing the board.

Abstract: The present invention relates to a board using crosslinked polylactic acid and a method for preparing same, and more specifically, to a board using the crosslinked polylactic acid which has superior processing properties during the preparation process and superior water-resistant properties after processing, by using a composition comprising the crosslinked polylactic acid and wood fiber, and to a method for preparing the same.

Abstract: The present invention relates to a foam sheet using cross-linked polylactic acid and method of manufacturing the same, and more particularly a foam sheet using cross-linked polylactic acid and method of manufacturing the same with not only excellent waterproofing and workability but also relatively high foaming ratio and a uniform closed foam cell structure, by producing cross-linked polylactic acid resin in a fixed condition using composites comprising polylactic acid, cross linking agents, and/or co-crosslinking agents, and then forming a sheet shape in a fixed condition using composites comprising the cross-linked polylactic acid and foaming agents, and then foaming at relatively high temperature conditions.

Abstract: An apparatus being capable of quickly removing noise from a partial discharge signal generated from the electrical power facility such as a gas insulated switchgear (GIS) and the like, and an apparatus for detecting a partial discharge generated section. The apparatus for removing noise from a partial discharge signal comprises a PD signal detection unit configured to detect a PD signal of the power facility and to detect and output peaks of the PD signal in respective preset time intervals, a noise signal detection unit configured to detect a noise signal outside the power facility and to detect and output peaks of the noise signal in the respective preset time intervals, and a noise removal unit configured to eliminate the peaks of the PD signal output in time intervals identical to those in which the peaks of the noise signal detection unit are output.

Abstract: Disclosed is a carburization heat treatment method including carburizing a workpiece at a relatively low temperature within a temperature range of A1˜A3 using a vacuum carburizing furnace and then performing quenching using a high-pressure gas, in which the workpiece is made of typical carburizing alloy steel having a carbon content of about 0.10˜0.35 wt %. This method can be applied to carburization heat treatment of a steel workpiece sensitive to heat deformation, such as an annulus gear, in lieu of a conventional gas carburization method using plug quenching.