Abstract: The present invention is a method for producing carbon fiber, characterized by using a carbon-fiber precursor produced from a polymer having a narrow molecular weight distribution and by applying only a small amount of a smoothing agent, composed of a specific component, to the carbon fiber surface immediately before winding of carbon fiber. According to the present invention, it is possible to stably produce carbon fiber, which has excellent dispersibility and do not deteriorate in quality and quality even when a sizing agent is not attached to the carbon fiber surface. In addition, the produced carbon fiber is suitable for use in a composite material which is produced by high-temperature processing using a thermoplastic resin.

Abstract: A luggage board for a vehicle includes a core layer; a first layer covering a portion of the core layer; and a second layer covering a remaining portion of the core layer except for a region covered by the first layer. End portions of the first layer and the second layer disposed on a side surface of the core layer are bonded to each other.

Abstract: The present disclosure relates to a thermoplastic polyurethane composition for injection molding and a method for manufacturing the same. Specifically, the thermoplastic polyurethane composition includes 0.5% by weight to 10.0% by weight of a sulfonate diol, 13% by weight to 60% by weight of an isocyanate, 30% by weight to 70% by weight of an ether-containing polyester polyol, and 5% by weight to 40% by weight of a chain extender.

Abstract: A layered sheet for interior material of vehicles and a method for manufacturing the same are disclosed. To improve both emotional quality and molding quality, the layered sheet includes: a skin layer including a polyurethane (PU) and a polyvinyl chloride (PVC) sheet layer disposed under the PU layer; and a base layer disposed under the PVC sheet layer. The base layer includes thermoplastic olefin (TPO), PU foam, or soft polypropylene (S-PP) foam.

Abstract: A polyethylene terephthalate bulked continuous filament is manufactured by steps of melt-spinning, multi-step stretching a polyethylene terephthalate chip and a master batch chip for coloring, passing through a texturing nozzle, cooling, and winding and has an elastic modulus of 1.00E+07 to 5.00E+09 Pa at a temperature range of 10° C. to 200° C., the filament being manufactured by steps of melt-spinning a polyethylene terephthalate chip and a master batch chip for coloring, multi-step stretching, passing through a texturing nozzle, cooling, and winding.

Abstract: Disclosed is a thermosetting composite resin composition including a thermosetting resin, particularly an unsaturated polyester resin, a low-profile additive and an inorganic filler, and to a method of manufacturing an automobile shell plate using the same. The thermosetting composite resin composition can be used to manufacture not only automobile shell plates having low specific gravity and superior surface smoothness and mechanical properties but also structural parts such as interior parts for airplanes or railways.

Abstract: A composition for an automotive interior skin, a method for manufacturing the same, and an automotive interior skin manufactured using the same. The composition for an automotive interior skin includes: 30 wt % to 70 wt % of a polyol compound; 5 wt % to 40 wt % of dicyclohexylmethane-4,4?-diisocyanate; and 5 wt % to 30 wt % of an aromatic glycol-based chain extender.

Abstract: Disclosed herein is a method for manufacturing a sound insulation material, a sound insulation material manufactured using this manufacturing method, and a carpet for a vehicle using the sound insulation material, and the sound insulation material is manufactured using a composite resin composition including 30 parts by weight to 70 parts by weight of aluminum oxide, 10 parts by weight to 20 parts by weight of nanoclay, 0.2 parts by weight to 0.8 parts by weight of an antioxidant, and 0.1 parts by weight to 0.5 parts by weight of a lubricant, with respect to 100 parts by weight of a base resin including PE, and the carpet for a vehicle is manufactured by coating the sound insulation material on a carpet fabric material and drying the result.

Abstract: A crash box for a vehicle, which mediates a back beam and a side member disposed in a width direction of the vehicle and absorbs crash energy when a crash occurs, may include a connecting body including a front coupling portion coupled to the back beam, a pair of side connecting portions bent from the front coupling portion to face each other, and a rear coupling portion extending from an end portion of each of the side connecting portions by being bent to be coupled to the side member; and a pair of connecting plates coupled to open upper and lower end portions of the connecting body, respectively.

Abstract: Disclosed are a partition panel for vehicles and a method of manufacturing the same. The partition panel for vehicles includes a panel part formed of a composite material to divide a trunk and the inside of a vehicle from each other and a reinforcement part formed of a composite material, inclined upwards from the center of the lower portion of the panel part to both ends of the panel part, and connected integrally to the panel part.

Abstract: A vehicular underframe structure may an include a lower panel including a composite material and having a central portion curved upwards along a longitudinal direction thereof; an upper panel including a composite material and combined on the lower panel wherein an undersurface thereof faces an upper surface of the lower panel with an internal compartment formed therebetween; and a rib portion provided in the internal compartment and having a lower rib integrally protruding upwards from the upper surface of the lower panel and an upper rib integrally protruding downwards from the undersurface of the upper panel.

Abstract: The solar cell protective sheet according to the present invention comprises a polymer layer, and a plurality of electrodes arranged thereon, wherein the plurality of electrodes comprises two or more unit electrodes arranged and separated in a first direction, each unit electrode comprising a cell region and a connecting region.

Abstract: A vehicular underframe structure may an include a lower panel including a composite material and having a central portion curved upwards along a longitudinal direction thereof; an upper panel including a composite material and combined on the lower panel wherein an undersurface thereof faces an upper surface of the lower panel with an internal compartment formed therebetween; and a rib portion provided in the internal compartment and having a lower rib integrally protruding upwards from the upper surface of the lower panel and an upper rib integrally protruding downwards from the undersurface of the upper panel.

Abstract: A crash box for a vehicle, which mediates a back beam and a side member disposed in a width direction of the vehicle and absorbs crash energy when a crash occurs, may include a connecting body including a front coupling portion coupled to the back beam, a pair of side connecting portions bent from the front coupling portion to face each other, and a rear coupling portion extending from an end portion of each of the side connecting portions by being bent to be coupled to the side member; and a pair of connecting plates coupled to open upper and lower end portions of the connecting body, respectively.

Abstract: A rod stiffener may include a rod molded by a glass fiber reinforced thermoplastic resin, and brackets connected to both ends of the rod, in which properties of a core part forming a center of the rod and an outer part surrounding the core part are formed to be different from each other, and the properties of the core part and the outer part are differentiated by a mixing amount of glass fiber and polypropylene resin including the glass fiber reinforced thermoplastic resin.

Abstract: A system and method is described to precisely control the pressure in a sample chamber over a wide range of pressures. The system comprises a sample chamber connected to additional chambers via on-off valves. The volumes of these chambers are accurately pre-measured. The valves can be electronically controlled by a controller, such as a computer with a processor. Computer control of these valves to vary the pressures in the chambers to achieve a precise target pressure in the sample chamber is performed in a sequence of steps where the pressure in each chamber is calculated after each step, thereby eliminating the requirement of measuring the actual pressure in the chambers.

Abstract: A car undercover is provided. The car undercover includes: a cover main body installed on a lower end of a front frame carrier; a plurality of mount units formed by being spaced at a predetermined interval in a longitudinal direction on an end of the cover main body, in order to install the cover main body; and a reinforcement rib formed by being protruded in a vertically longitudinal direction on an internal side of the cover main body, in order to reinforce strength, wherein the reinforcement rib includes a stiffener formed by being protruded from the reinforcement rib in a shape opposite to a shape of the reinforcement rib. The car undercover may minimize damage of a pedestrian, by not being broken when colliding with the pedestrian. In addition, the car undercover may minimize damage of internal components, by being broken when colliding with a vehicle.

Abstract: A bumper back-beam for a vehicle is provided. The bumper back beam includes a glass fiber mat reinforced plastic composite and a carbon fiber reinforced plastic composite disposed within the glass fiber reinforced plastic composite. The glass fiber mat reinforced plastic composite includes polypropylene at about 45 to 60 wt. %, glass fiber at about 35 to 45 wt. %, a crosslink agent at about 0.1 to 10 wt. %, peroxide at 0.1 to 4 wt. %, and an antioxidant at about 0.1 to 4 wt. %. The carbon fiber reinforced plastic composite includes a thermoplastic resin at about 40 to 60 wt. % and a carbon reinforced fiber at about 40 to 60 wt. % arranged in a predetermined direction.

Abstract: The disclosure describes a method of producing iron nitride magnets using Zn-doped iron oxide precursors. The iron oxide precursors are reduced and nitrided to produce a powder containing iron nitride in the Fe16N2 phase. The inclusion of Zn in the iron oxide precursor enhances the magnetic properties of the iron nitride powder.

Abstract: A rod stiffener may include a rod molded by a glass fiber reinforced thermoplastic resin, and brackets connected to both ends of the rod, in which properties of a core part forming a center of the rod and an outer part surrounding the core part are formed to be different from each other, and the properties of the core part and the outer part are differentiated by a mixing amount of glass fiber and polypropylene resin including the glass fiber reinforced thermoplastic resin.