A method for decolorization of a dyed polyester fiber is provided. The method for decolorization of a dyed polyester fiber includes step of: providing an ether-alcohol solvent and a polyester fiber containing a dye; heating the ether-alcohol solvent up to a boiling point of the ether-alcohol solvent to continuingly generate a fresh gas; wherein a temperature of the fresh gas ranges from 90 C. to 200 C. which is between a glass transition temperature of the polyester fiber and a melting point of the polyester fiber; extracting the dye from the polyester fiber via the fresh gas and forming an extracting condensate containing the dye; reflowing the extracting condensate back into the ether-alcohol solvent; repeating the steps mentioned above to obtain a decolorized polyester fiber.

A method for decolorization of a dyed polyester fiber is provided. The method for decolorization of a dyed polyester fiber includes step of: providing an ether-alcohol solvent and a polyester fiber containing a dye; heating the ether-alcohol solvent up to a boiling point of the ether-alcohol solvent to continuingly generate a fresh gas; wherein a temperature of the fresh gas ranges from 90 C. to 200 C. which is between a glass transition temperature of the polyester fiber and a melting point of the polyester fiber; extracting the dye from the polyester fiber via the fresh gas and forming an extracting condensate containing the dye; reflowing the extracting condensate back into the ether-alcohol solvent; repeating the steps mentioned above to obtain a decolorized polyester fiber.

A functional substance adsorption device for fibers including: a casing having a space formed therein and an opening and closing door located on the front surface thereof; a drum rotatably disposed inside the casing and having a space formed therein to put the fibers therein and a plurality of fine through holes formed thereon; a driving part disposed on one side of the casing to rotate the drum; and a fine particle supply part comprising a fine particle supply hose communicating with the outer periphery of the casing, a vaporization tank connected to one side of the fine particle supply hose, a pneumatic ultrasound generator disposed inside the vaporization tank to vaporize an antimicrobial agent, and an air compressor for supplying pneumatic pressure to the pneumatic ultrasound generator.

A functional substance adsorption device for fibers including: a casing having a space formed therein and an opening and closing door located on the front surface thereof; a drum rotatably disposed inside the casing and having a space formed therein to put the fibers therein and a plurality of fine through holes formed thereon; a driving part disposed on one side of the casing to rotate the drum; and a fine particle supply part comprising a fine particle supply hose communicating with the outer periphery of the casing, a vaporization tank connected to one side of the fine particle supply hose, a pneumatic ultrasound generator disposed inside the vaporization tank to vaporize an antimicrobial agent, and an air compressor for supplying pneumatic pressure to the pneumatic ultrasound generator.

An apparatus for treating a fiber material such as textiles is shown. The fiber material is fed to a reactor volume having an upper and a lower end, and the reactor volume is limited by a first filter in a lower end of the reactor volume and a second filter in the upper end of the reactor volume. A flow of solvent is led through the reactor volume entering the reactor volume through the first filter and exiting the reactor volume through the second filter.