Abstract: The present invention discloses a security yarn containing a multi-composite spinning fiber and security products using the same. The multi-composite spinning fiber, according to the present invention, contains, in at least one or more kinds of polymer materials, a first component selected from an IR reactive pigment or an IR absorption pigment, a second component selected from a visible pigment or an invisible UV-reactive fluorescent pigment, and a third component selected from X-ray absorption materials, so that the security yarn containing the multi-component spinning fiber can be identified by infrared and ultraviolet wavelength and easily identified when irradiated with X-rays, thus providing a multi-identification capability and being useful for preventing counterfeiting.

Abstract: A method and apparatus for fabricating a conjugate fiber. Resins having different properties, for example, resins of the same or different components including functional pigments or substances are continuously and alternatively discharged in an endless state by operating a spinning nozzle unit in a melting state, thereby fabricating the conjugate fiber having the different properties in the longitudinal direction of the fiber, and having various surface effects and patterns in the longitudinal direction of the fiber. A conjugate fiber fabricated by the above apparatus and method is also provided.

Abstract: The present invention relates to a water treatment agent, a preparation method therefor, a water treatment apparatus using the same, and an in-situ groundwater treatment apparatus and, more specifically, to: a water treatment agent comprising a carbon nanotube support, and ?-manganese dioxide nanoparticles adsorbed on the carbon nanotube support and having a particle size of 1,000 nm or less; a preparation method therefor; a water treatment apparatus using the same; and an in-situ groundwater treatment apparatus.

Abstract: The present invention relates to a water treatment agent, a preparation method therefor, a water treatment apparatus using the same, and an in-situ groundwater treatment apparatus and, more specifically, to: a water treatment agent comprising a carbon nanotube support, and ?-manganese dioxide nanoparticles adsorbed on the carbon nanotube support and having a particle size of 1,000 nm or less; a preparation method therefor; a water treatment apparatus using the same; and an in-situ groundwater treatment apparatus.

Abstract: The present invention relates to a relates to a water treatment agent, a preparation method thereof, and a water treatment system and an on-site underground water treatment system using the same, and more particularly, to a water treatment agent including an activated carbon support, and manganese oxide nanoparticles immobilized onto the activated carbon support, having a particle size less than or equal to 1,000 nm, and formed by respiration and metabolism of manganese oxidizing bacteria, a preparation method thereof, and a water treatment system and an on-site underground water treatment system using the same.

Abstract: The present invention discloses a security yarn containing a multi-composite spinning fiber and security products using the same. The multi-composite spinning fiber, according to the present invention, contains, in at least one or more kinds of polymer materials, a first component selected from an IR reactive pigment or an IR absorption pigment, a second component selected from a visible pigment or an invisible UV-reactive fluorescent pigment, and a third component selected from X-ray absorption materials, so that the security yarn containing the multi-component spinning fiber can be identified by infrared and ultraviolet wavelength and easily identified when irradiated with X-rays, thus providing a multi-identification capability and being useful for preventing counterfeiting.

Abstract: A method and apparatus for fabricating a conjugate fiber. Resins having different properties, for example, resins of the same or different components including functional pigments or substances are continuously and alternatively discharged in an endless state by operating a spinning nozzle unit in a melting state, thereby fabricating the conjugate fiber having the different properties in the longitudinal direction of the fiber, and having various surface effects and patterns in the longitudinal direction of the fiber. A conjugate fiber fabricated by the above apparatus and method is also provided.