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연신 heat plate 온도가 폴리에스터 섬유의 구조와 염색성에 미치는 영향
조현태,김우섭,Cho Hyeon Tae,Kim Woo Sup 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.1
Effects of heat-set temperature in yarn formation process on the structure and properties of two different polyester fibers, undrawn yarn (UDY) and partially-oriented yarn (POY), were investigated. Drawing temperature was fixed at $80^{\circ}C$ for UDY and $90^{\circ}C$ for POY which had been determined as the optimum temperature in a previous study. The heat plate temperature was varied by $5^{\circ}C$ intervals near the critical crystallization temperature ($T_{cc}$) of polyester in order to determine the effects of the temperature changes on the orientation, crystallization, fiber evenness, mechanical and dyeing properties of the polyester fibers. Results indicated that the heat plate temperature did not have a great effect on the mechanical properties and evenness of the fibers. However, a marginal reduction of dye exhaustion and dyeing rate was caused with increase in heat plate temperature. These effects were discussed with respect to the structural changes of the fibers in the fiber formation process.
조현태,박철권,Cho, Hyeon-Tae,Park, Chul-Kwon 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.1
To verify the dyeing behaviors of disperse, acid dye, and metal complex dye on nylon/PET(N/P) split type microfiber in the one bath-one step dyeing, the exhaustion curves of the dyes in single and mixed dye bath were measured under different dyeing temperature and pH of dye bath. Exhaustion behaviors of disperse dye in the one bath dyeing of NIP split type microfiber with disperse dye/acid dye or disperse dye/metal complex dye were not significantly affected by dyeing temperature and pH of dyebath. Acid dye showed high temperature dependency of adsorption-desorption behavior during elevation of dyeing temperature in the one bath dyeing of N/P split type microfiber with disperse dye and acid dye. Metal complex dye in the one bath dyeing of N/P split type microfiber with disperse dye and metal complex dye showed also the temperature dependency of adsorption-desorption, but the final absorption was higher than that of acid dye in the same dyeing conditions and increased with decrease of dyebath pH. The staining of disperse dye on nylon was not effected by dyeing temperature but was decreased with the decrease of pH in the one bath dyeing of N/P split type microfiber.
첨가제 도핑에 의한 나일론 6 BCF의 내광성 및 내열성 개선
조현태,이경남,Cho, Hyeon-Tae,Lee, Kyung-Nam 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.1
Effect of light and heat resisting additives on fading of a acid dye(C.I. Acid Red 361) on nylon 6 BCF and degradation of the fiber were studied. These additives were doped in the fiber as a master batch chip during spinning process to improve dye fading or fiber degradation when nylon 6 BCF was exposed under UV-irradiation and heat. The dye fading was affected by not only UV-radiation but also heat especially above $100^{\circ}C$. With applied additives the dye fading caused by UV-radiation or heat could be lowered but the effect was not remarkable. The tensile strength retention of undyed sample was higher than that of dyed sample when the fiber was exposed under UV-irradiation. Thus it is concluded that the acid dye creates active radicals more easily than fiber during exposure of UV-irradiation and acts as a photo accelerator in degradation of nylon 6 BCF. On the other hand, the tensile strength retention of undyed sample was lower than that of dyed sample when heat was applied to the fiber. This could be attributed that radicals created during fiber degradation by heat preferably attack dye molecules rather than transfer to nylon 6 fiber molecules which causes chain scissoring. Light and thermal degradation of nylon 6 BCF were greatly improved by doping with a UV-absorber, light resisting agents or heat resisting agents to the nylon 6 BCF, but it is not easy to improve dye fading. Thus new combinations of light and thermal resisting agents showing more effective to both thermal and light fading of dye are necessary for higher light fast dyeing of nylon 6 BCF.
조현태,이재덕,조재준,Cho, Hyeon-Tae,Lee, Jae-Dug,Cho, Jae-Jun 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.8
The chemical structure of aminopropyl cellulose is represented as follows : cellulose-g-CH2CH2CH2-NHa. The degree of substitution may be varied with the immunization process to be employed in previous papers. The amino groups in it undergo various reactions which are characteristic of aliphatic primary amines, Therefore in this paper, dyeing properties of the aminopropyl cellulose for the anionic dye and the reactive dye were investigated. The adsorption capacity of metal ion by it was also measured and the application of it to the crease-resistant finish was discussed.
조현태,이헌,Cho, Hyeon-Tae,Lee, Hun 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.2
Wide range of fineness of ultra-fine denier PET filaments (0.2~0.01 denier per filament) were prepared and the effects of fineness on the dyeing properties of a disperse dye (CI Disperse Blue 56) were studied. The equilibrium study of the disperse dye on the fibers at various concentrations showed that the isothermal absorption was Nernst type and that the equilibrium adsorption of the dye increased with the increase in fiber fineness. Dyeing rate of the dye increased with the decrease in fiber fineness. The apparent diffusion coefficient of the dye in the ultra-fine denier fibers decreased when the fiber fineness increased because of the limited dye liquor turbulence through the compactly assembled filaments in the ultra-fine denier yarn. The temperature dependence of dye diffusion decreased with the fiber fineness.
조현태,이재덕,조재준,Cho, Hyeon-Tae,Lee, Jae-Dug,Cho, Jae-Jun 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.8
Aromatic primary amino group was introduced into cellulose by curing with 4-amino-phenyl-g-sulfatoethylsul(one. These free amino groups, even in very low concentration, altered the chemical properties of cellulose. The animalized cotton fabric absorbed anionic dye and reacted with rective dye and glutaraldehyde. Thus the dyeing properties of it were investigated and the possibility of application to the crease-resistant finish was discussed.
산성염료/나일론 염색에서 염액 pH와 염료흡착의 실시간 제어(I) -염액 pH의 제어 profile-
황지상,조현태,Hwang Jee-Sang,Cho Hyeon-Tae 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.1
As a pre-work for real time control of dye adsorption in acid dye/nylon system, a dyebath pH control system was developed by combining chemical dosing and pH measuring equipment, dye bath analysis system, and pH control software. Three types of pH control profiles (Gaussian, exponential, and linear) were proposed for control of dyebath pH and dyeing rate. pH control results were estimated at various conditions-acid and alkali concentration, flow rate of dyeing bath, acid and alkali feed interval. The relation between the pH control profiles and adsorption behaviors of the dye was discussed. From these results, it was concluded that the Gauss type profile was more appropriate than other types for the dyebath pH control in nylon dyeing with acid dyes.
산성염료/Nylon 염색에서 pH와 염료흡착의 실시간 제어(II) -퍼지를 이용한 염색속도 상수와 흡진율 예측-
황지상,조현태,Hwang, Jee-Sang,Cho, Hyeon-Tae 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.1
A fuzzy system which can predict a dyeing rate constant and maximum adsorption in acid dye/nylon system was studied. In this system, pH control profile constant is an input variable and dyeing rate constant is an output variable and the simplified reasoning for fuzzy inference and gradient descent algorithm for optimizing the fuzzy system are used. The result showed that it is possible to predict dyeing rate constants and maximum adsorption with the online control of dyebath pH in acid dye/nylon dyeing system.