Abstract: The present invention is directed to a composite elastic yarn, including a core section including an elastic core filament, and a sheath section including staple fibers surrounding the core section, wherein the elastic core filament has a low cohesion property in which the inter-filament cohesion thereof is within the range of 9 to 198 mg when measured according to the ASTM D3822 method, and is also directed to a fabric, and a method for manufacturing a composite elastic yarn. According to the present invention, it is possible to solve a puckering problem occurring on the surface of a denim fabric, thereby improving a touch sensation and the quality of a final product.

Abstract: The present invention relates to a spandex fiber and a method for manufacturing the same that is capable of providing excellent adhesive characteristics, by means of a hot melt adhesive, between the spandex fiber and a polypropylene nonwoven fabric or a polyethylene film, during a diaper-manufacturing process. The method for manufacturing a spandex fiber comprises the steps of: preparing a polyurethane urea solution as a spinning solution; and dry-spinning the spinning solution to obtain the spandex fiber, where the polyurethane urea solution contains, with respect to the weight of the solid content, about 0.1 to 30 wt. % of an ethylene vinyl acetate monomer or polymer, or a derivative thereof, a C9 hydrocarbon-based resin monomer or polymer, or a derivative thereof, a C5 hydrocarbon-based resin monomer or polymer, or a derivative thereof, or a C5/C9 hydrocarbon-based resin monomer or copolymer, or a derivative thereof.

Abstract: The present invention relates to a spandex fiber and a method for manufacturing the same that is capable of providing excellent adhesive characteristics, by means of a hot melt adhesive, between the spandex fiber and a polypropylene nonwoven fabric or a polyethylene film, during a diaper-manufacturing process. The method for manufacturing a spandex fiber comprises the steps of: preparing a polyurethane urea solution as a spinning solution; and dry-spinning the spinning solution to obtain the spandex fiber, where the polyurethane urea solution contains, with respect to the weight of the solid content, about 0.1 to 30 wt. % of an ethylene vinyl acetate monomer or polymer, or a derivative thereof, a C9 hydrocarbon-based resin monomer or polymer, or a derivative thereof, a C5 hydrocarbon-based resin monomer or polymer, or a derivative thereof, or a C5/C9 hydrocarbon-based resin monomer or copolymer, or a derivative thereof.

Abstract: The present invention relates to a spandex fiber and a method for manufacturing the same that is capable of providing excellent adhesive characteristics, by means of a hot melt adhesive, between the spandex fiber and a polypropylene nonwoven fabric or a polyethylene film, during a diaper-manufacturing process. The method for manufacturing a spandex fiber comprises the steps of: preparing a polyurethane urea solution as a spinning solution; and dry-spinning the spinning solution to obtain the spandex fiber, where the polyurethane urea solution contains, with respect to the weight of the solid content, about 0.1 to 30 wt. % of an ethylene vinyl acetate monomer or polymer, or a derivative thereof, a C9 hydrocarbon-based resin monomer or polymer, or a derivative thereof, a C5 hydrocarbon-based resin monomer or polymer, or a derivative thereof, or a C5/C9 hydrocarbon-based resin monomer or copolymer, or a derivative thereof.