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Dyeing Properties of Bi-functional Reactive Dyes on a Novel Regenerated Cellulosic Fiber
Koh, Joonseok,Kim, Ik Soo,Kim, Sung Soo,Shim, Woo Sub,Kim, Jae Pil The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.1
Three bi-functional reactive dyes such as Bis(vinylsulphone) type, Bis(monochlorotriazine) type and Bis(mononicotinotriazine) type were applied to regular viscose rayon and new regenerated cellulosic fiber ($enVix^ⓡ$) which was prepared from cellulose acetate fiber by the hydrolysis of acetyl groups, and their dyeing properties and fastness properties were compared. enVix exhibited better dyeability and fastness than regular viscose rayon and these results were also explained by the differences in the supramolecular structure of these two fibers.
pH Control for Dyebath Reuse in Dyeing of Polyamide with Binary Mixtures of Acid Dyes
Koh, Joonseok,Park, Sang Hyuck,Shim, Goo Hwan,Cho, Dae Hwan,Kim, Jae Pil The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.2
Hydrolyzable organic esters were compared with ammonium sulphate as an acid donor for the pH control in dye-bath-reuse system of acid dyes mixtures. The ability of pH control, levelness, dyeing properties and reproducibility in dye-bath-reuse system were investigated comparatively. Hydrolyzable organic esters showed higher exhaustion and color yield than ammonium sulphate. In addition, hydrolyzable organic ester exhibited very low conductivity less than 0.5 mS, while ammonium sulphate give high conductivity. However, we could not observe any difference in levelness of dyed samples between two kinds of acid donors in laboratory scale dyeing. Over 10 cycles of reuse, hydrolyzable organic esters showed higher reproducibility than ammonium sulphate. No deterioration of the color fastness and levelness occurs over 10 cycles of reuse.
Koh, Joonseok,Cho, Dae Hwan The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.2
Dyeing properties of a series of 4-amino-4'-fluorosulfonylazobenzene disperse dyes on poly(ethylene terephthalate) (PET) were investigated. Build-up properties and color properties on PET were examined. In particular, the 4-aminoazobenzene dyes containing a nitro group instead of a fluorosulfonyl group at 4'-position were also synthesized in order to compare their dyeing properties on PET with that of 4'-fluorosulfonyl analogues.
고준석,박종호,이권선,김성동,Koh Joonseok,Park Jong Ho,Lee Kwon Sun,Kim Sung Dong 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.6
The weight reduction properties and dyeing properties of sea-island type PET supermicrofiber were compared with those of normal sea-island type PET microfibers. The alkaline dissolution behavior of microfibers were monitored using a cationic dye staining method. The dye uptake of finer microfibers commences at lower temperatures and showed faster rate of dye uptake. The build-up and wet fastness properties of disperse dyes on finer microfbers were relatively poor since more dye was required to achieve a given depth of shade due to the large surface area. Also, the low temperature dyeing of microfibers produced higher color yield than normal high temperature dyeing because of less dye migration to the coarser fibers during dyeing.