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pISSN : 1229-0033 / eISSN : 2234-036X

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2010, Vol.22, No.1

  • 1.

    Synthesis of Red Disperse Dyes with Various Diazo Components and Coloration of Unmodified Pure Polypropylene Fibers

    김태경 | 전선희 | 장경진 | 2010, 22(1) | pp.1~7 | number of Cited : 11
    Abstract PDF
    Abstract― The five new red disperse dyes for unmodified pure polypropylene fibers were synthesized. As a coupling component,a di‐n‐hexyl substituent was used in common, while various substituents were used for the diazo component. The dye having electron donating group at diazo component showed hypsochromic shift compared to the unsubstituted dye, while the dyes having electron withdrawing groups showed bathochromic shift. Owing to their extreme hydrophobicity caused by the di‐n‐hexyl substituent, all dyes exhibited very high affinity toward pure polypropylene fibers. Fastness to washing was very good for all dyes and fastness to light was good except two purplish red dyes.
  • 2.

    Effect of Yarn Characteristics on the Needle Contamination during Knitting Process

    Young-Seok Koo | 2010, 22(1) | pp.8~13 | number of Cited : 0
    Abstract PDF
    Abstract― Needle contamination was investigated using a test rig simulated the knitting points in the knitting machine in relation with the characteristics of knitting yarn such as yarn type and moisture contents. When used open-end yarn compared with combed and carded ring-spun yarns, the needle contamination was significantly increased because of the higher friction between yarn and needle by the fly and other impurities. Also Lower moisture content of the yarns aggravated the needle contamination. In addition knitting yarn breakage was substantially influenced by the higher needle contamination.
  • 3.

    Wool Dyeing with Sepia Melanin

    Jinho Jang | Su-Jin Kim | Hye-Ryun Kwon and 1other persons | 2010, 22(1) | pp.14~20 | number of Cited : 3
    Abstract PDF
    Abstract― Squid ink was purified to melanin powder by repeated treatments with aqueous sodium hydroxide and acetic acid solutions. The exhaustion dyeing conditions of melanin to wool fabrics were investigated in relation with pH, melanin concentration,dyeing temperature and time. The melanin was dyeable to cotton and wool fabrics but higher dyeability of the wool was observed. A K/S of 7 was obtained on the optimally dyed wool fabrics with 5 %owf melanin under pH 4 at 100℃ for 60 minutes. Color fastness to both washing and rubbing was excellent and color fastness to light was also very good probably due to the polymeric nature of the extracted sepia melanin.
  • 4.

    Dyeing of Cotton fabrics by Glycyrrhizae Radix Extract

    이영숙 | Jeong Dae Jang | 2010, 22(1) | pp.21~27 | number of Cited : 7
    Abstract PDF
    Abstract― The purpose of this research was to investigate the color characteristic and the dyeing properties of Glycyrrhizae Radix extract on cotton fabrics. The highest absorbance of Glycyrrhizae Radix extract was obtained in 75 v/v% of ethyl alcohol in water. Pre-mordanted cotton fabrics dyed at 30℃ and pH 3 for 80 minutes showed the highest K/S value. According to the dyeing conditions, the colors of the fabrics varied from yellow(Y) and yellowish red(YR) to greenish yellow(GY). The color fastness of the fabrics in dry-cleaning and water was 4~5 rating. The deodorization capacity and UV-cut effect of the dyed fabrics were higher than those of undyed ones.
  • 5.

    Application of Deep Black Color on Polyester Fabrics by Color Matching

    홍영기 | Kieseo Bae | Kim, Yong-Duck and 2other persons | 2010, 22(1) | pp.28~36 | number of Cited : 3
    Abstract PDF
    Abstract― The deep black coloration of polyester fabrics was obtained by the physical properties of color and color mixing system. In this experiment, we have measured the absorbance and the reflectance of various disperse dyes for accomplishing the lowest lightness value and uniform reflectance, and new matching algorithm and computer color matching was made. The matching used both isomeric and metameric matching. The color matching of deep black color represented low lightness. Though actual reflectance of dyed polyester fabrics using these matching results was as high as theoretical one, low lightness value(L*) and uniform appearance were achieved.
  • 6.

    Effect of Polymer Wrapping on the Properties of ABS/MWNT Nanocomposites

    Byung Gil Min | Jung-Hwan Kim | 2010, 22(1) | pp.37~42 | number of Cited : 0
    Abstract PDF
    Abstract― ABS/MWNT nanocomposites were prepared by using MWNT wrapped with SAN through melt compounding. Effect of wrapping of MWNT by SAN on the morphology, mechanical and electrical properties of ABS/MWNT were analyzed. It was found that SAN could wrap MWNT effectively indicated by the increased thickness after wrapping, which is presumably due to helical structure of polyacrylonitrile component in a block copolymer of SAN. MWNT was observed to be dispersed more evenly in ABS matrix by SAN wrapping, which resulted in improved tensile properties of the composites. On the other hand, there was little effect on the impact strength and electrical properties of ABS having inherently high impact strength.
  • 7.

    Modification of Carbon Nanotube for the Improvement of Dispersion and the Dispersion Characteristics of Carbon Nanotube in Polyurethane

    박경순 | Seung-Jin Kim | KWON OH KYUNG and 2other persons | 2010, 22(1) | pp.43~50 | number of Cited : 4
    Abstract PDF
    Abstract― The thermal treatment for carbon nanotube was applied to remove the water, metal catalyst and other impurities in carbon nanotube. The surface of carbon nanotube was changed into open structure with acid treatment by mixed solution of HNO3and H2SO4. The dispersion property of the functionalized and modified carbon nanotube was assessed with naked eyes by dispersing it in DMF. Carbon nanotube mixd polyurethane film was made to estimate the dispersion property by reflectance of the film with UV-Vis spectrometer. Also the internal structure of carbon nanotube was observed with SEM and TEM and thermal pyrolysis property of the carbon nanotube was measured by TGA and DSC. The surface modification of carbon nanotube by thermal and acid treatments improved the dispersion property of carbon nanotube/polyurethane mixed materials.
  • 8.

    The Effects of Drawing Conditions on Physical Properties of the Drawn Worsted Yarns (Ⅰ)

    한원희 | Seung-Jin Kim | Kim Sang Ryong | 2010, 22(1) | pp.51~60 | number of Cited : 4
    Abstract PDF
    Abstract― This research works on the effects of drawing conditions on the physical properties of the drawn worsted yarns. The drawn worsted yarns were made by the yarn drawing system under various drawing conditions such as concentration of reducing agent, draw ratio, setting time of drawn yarn, and concentration of oxidizing agent. The drawn worsted yarns from 2/80Nm to 2/90Nm were obtained from 2/60Nm worsted yarns, the surface and cross-sectional shapes and tensile properties of these various specimens were measured and discussed with the various drawing conditions. The drawing of worsted yarn made constituent wool fiber scratched and made it changing to polygonal cross-sectional shape. The tenacity and modulus were increased with draw ratio and concentration of reducing agent. And tensile strain was increased with draw ratio, which decreased with concentration of reducing agent.
  • 9.

    The Effects of Drawing Conditions on Physical Properties of the Drawn Worsted Yarns (Ⅱ)

    한원희 | Seung-Jin Kim | 조진황 | 2010, 22(1) | pp.61~70 | number of Cited : 1
    Abstract PDF
    Abstract― This effects of drawing conditions on the physical properties of the drawn worsted yarns were investigated. The drawn worsted yarns were made on the yarn drawing system with various drawing conditions such as concentration of reducing agent, draw ratio, setting time of drawn yarn and concentration of oxidizing agent. The dry and wet shrinkage, irregularity(CV%), thin and thick part, hairiness and abrasion resistance of these various specimens were measured and discussed in terms of various drawing conditions.
  • 10.

    Dyeability of Silk Fabrics Using Extracts of Ligustrum Japonicum Thunb Fruit

    Hyesun Lee | Sung-Mi Ko | 2010, 22(1) | pp.71~76 | number of Cited : 6
    Abstract PDF
    Abstract― In this study the optimum dyeing conditions and blocking effect of UV deodorization efficiency of Ligustrum japonicum Thunb were investigated. Colorants were water-extracted from Ligustrum japonicum Thunb fruit and freeze-drided to obtain colorants powder. The effects of dye concentration, dyeing temperature, dyeing time, and the number of dipping count were studied. Fastness to dry cleaning, rubbing, perspiration, and light were measured according to KS K 0644, KS K 0650, KS K 0715and KS K 0700, respectively. In order to examine the dyeability according to dyeing conditions, reflectance of fabrics were measured by using UV/VIS spectrophotometer. The bath ratio was 1:20. Dyeing concentration was 100, 200, 300, 400 and 500% on the weight of fiber. Dyeing time was 20,40, 60, and 80 minutes. Dyeing temperature was 20, 40, 60, 80, and 100℃. The infrared high pressure dying machine was used. As dyeing concentration increased, dye adsorption increased up to 400% and it slowed down. Dye uptake was increased with raising themperature up to 80℃ and it slowed down. Dye adsorption occurred rapidly at first 20 minutes and then it slowed down and reached almost maximum dye uptake at 60 min. Dye uptake increased by repeated dyeing. Therefore, it is considered that optimum dyeing condition is 400%(o.w.f.), 80℃, 60 min. And repeated dyeing improves dye uptake. Color fastness to dry cleaning and rubbing was good, but light fastness and perspiration fastness was not good. Blocking effect of ultraviolet radiation and deodorization efficiency was good.
  • 11.

    Fabrication of Highly Conductive Yarn using Electroless Nickel Plating

    Jooyong Kim | Soya Hong | 이창환 | 2010, 22(1) | pp.77~82 | number of Cited : 0
    Abstract PDF
    Abstract― Highly conductive yarn was successfully obtained using electroless nickel plating method with palladium activation. In the presence of palladium seed on surface of fibers as a catalyst, continuos nickel layer produced on surface of fibers by reducing Ni2+ ion in the electroless plating bath to Ni0. It was found that the Pd-activation using SnCl2 and PdCl2 to deposit palladium seeds on the surface of fibers plays a key role in the subsequent electroless plating of nickel. It also found that electroless nickel plating on the fibers can induce the nickel-plated ELEXⓇ fibers to improve the electrical conductivity of the fibers. The thickness of nickel coating layer on the Pd-activated ELEXⓇ fibers and specific conductivity of the fiber were increased through electroless plating time. The temperature of nickel plating bath was very effective to enhance the nickel deposition rate.