• Title/Summary/Keyword: dyes

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The One-bath One-step Dyeing of Nylon/Cotton Blends with Acid Dyes and Mononicotinic acid-triazine type Reactive Dyes (산성염료 및 중성고착형 반응성염료를 이용한 나일론/면 교직물의 1욕 1단 염색)

  • Kim Ji-Yeon;Lee Ki-Poong;Park Hyun-Min;Yoon Nam-Sik;Cho Kwang-Ho
    • Textile Coloration and Finishing
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    • v.16 no.5
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    • pp.1-7
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    • 2004
  • Because acid dyes and reactive dyes require acidic condition for adsorption and alkaline condition for fixation respectively, it is difficult to dye nylon/cotton blends in one-bath one-step dyeing method. In this paper we tried to find out the suitable dye and dyeing condition for one-bath one-step dyeing of nylon/cotton blends. MNT type reactive dyes showed higher exhaustion on cotton as compared with MCT type dyes at neutral pH, which means that the MNT type reactive dyes are preferable for one-bath one-step dyeing method. The optimum condition for one-bath one-step dyeing of nylon/cotton blends was found to be pH 7. Wash fastness of fabrics dyed with half-milling type acid dyes was superior to that of fabrics dyed with levelling type acid dyes, when MNT type reactive dyes were used together.

Hand Value Assessment of Soybean/Cotton Blended Fabric after Natural and Synthetic Dyeing (대두와 면 혼방직물의 염색에 따른 태의 비교)

  • Song, Kyung-Hun;Kim, Jeong-Hwa;Hong, Young-Ki;Gu, Gi-Young
    • Korean Journal of Human Ecology
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    • v.16 no.5
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    • pp.979-986
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    • 2007
  • The purpose of this study is to investigate the dyeability, and the hand of soybean/cotton blended fabric after dyeing with natural and synthetic dyes. Soybean/cotton blended fabrics dyed with extracted solution from turmeric, sappan wood, gardenia and synthetic dyes(weak-acid dyes, reactive dyes, direct dyes). The hand value of soybean/cotton blended fabrics dyed with 6 different dyes was measured using Kawabata Evaluation System. The results are as follows; 1. The K/S value of the soybean/cotton blended fabric dyed with sappan wood extracts was the highest. 2. The color fastness of the soybean/cotton blended fabric dyed with reactive dyes was excellent. The fastness to the light of the same fabric was much better than the other fabrics. 3. Linearity of load-extension and tensile energy of the soybean/cotton blended fabric dyed with sappan wood extracts showed very high. Shear stiffness of the soybean/cotton blended fabric dyed with weak-acid dyes was much higher than that of fabric of dyed with reactive dyes. Bending property of the fabrics dyed with natural colorants(sappan wood, gardenia) showed very high, but that the fabric dyed with reactive dyes was very poor. 4. In the primary hand value, stiffness and anti-drape stiffness of the fabric dyed with weak-acid dyes showed the highest. Fullness and softness of the fabric dyed with weak-acid dyes showed very low.

Biodergradation of Reactive Dyes Using Multistage Rotating Disc Contactor Immobilized by Aspergillus sojae B-10 (회전원판 반응조에 고정화시킨 Aspergillus sojae B-10에 의한 반응성 염료의 탈색)

  • 류병호;김동석;진승록;정종순;원용돈
    • Journal of Environmental Health Sciences
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    • v.21 no.4
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    • pp.49-55
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    • 1995
  • Dyes are released into the environment as industrial wasterwater. Dyes are considered to be a pollution problem because of the wide spread into environment with a variety of colors. Continuous biodegradation of reactive dyes such as Rifacion Red H-3EB, Rifazol Blue BT, Rifacion Yellow P4G and Rifacion Brown RT were demonstrated using multistage rotating disc contactor immobilized by Aspergillus sojae B-10. Aspergillus sojae B-10 was cultivated the optimal medium containing 2.0% glucose, 0.08% $NaNO_3$, 0.1% $KH_2PO_4$ and 0.5% $MgSO_4\cdot 7H_2O$, pH 5 at 32$\circ$C. Mycelium of Aspergillus sojae B-10 were guck to the rotating disc for 10 days until steady state. For continuous biodegradation of reactive dyes by using rotating disc contactor, it was most effective biodegradation in the medium containing 1,000 ppm each dyes at the medium feeding rate of 20 ml per hour. Under the conditions biodegradation of each dyes on 2, 4 and 6 days were 20~50%, 75% and 96%, respectively. Therefore, practical application of reactive dyes were carried out at the feeding rate of 20 ml/h as synthetic wasterwater containing 500 ppm of mixture reactive dyes. It was found the highest levels of 94% biodegradation during 20 days.

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Kinds and Types of Dyes Used in the Joseon Dynasty (조선시대 염료의 종류와 유형)

  • Kim, Soon-Young
    • Journal of the Korean Society of Clothing and Textiles
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    • v.38 no.2
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    • pp.201-215
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    • 2014
  • This study explores the kinds and types of dyes used in the Joseon Dynasty. Some literature including "Sanga Yorok", "Gyuhap Chongseo", "Imwon Gyeonjeji" were reviewed for this purpose. The findings are as follows. The colors obtained from the dyes were divided into seven color series, such as red, yellow and orange, green, blue, purple, brown, gray and black. These are practical color categories differed from abstract five cardinal colors [五方色]. The diachronic dyes used during the Joseon Dynasty were safflower and Japanese alder bark for red, indigo leaves for blue, gromwell for purple, chestnut tree bark for brown. The representative dyes used in the late Joseon Dynasty were safflower and sappan wood for red, wild pear tree bark and Pentapetes phoenicea for yellow and orange, indigo leaves for blue, sappan wood and gromwell for purple, mulberry tree for brown, and Chinese ink for gray. Common dyes used both in Joseon and China were safflower and sappan wood for red, pagoda tree blossom for yellow, a combination of pagoda tree blossom (or Amur cork tree) and indigo leaves (or sediment) for green, indigo leavers or sediment for blue, sappan wood and hollyhock for purple, and a combination of indigo leaves and Galla Rhois for gray and black.

Efficiency of Dyes Extraction and Dyeing of Safflower according to pH Condition (pH에 따른 홍화(紅花)의 색소(色素) 추출(抽出)과 염색(染色)의 효율성(效率性)``)

  • Kim, Kyung-Sun;Jeon, Dong-Won;Oh, Ha-Na;Lee, Hye-Yeon
    • Journal of Fashion Business
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    • v.11 no.2
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    • pp.102-112
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    • 2007
  • Effect of the pH condition was examined on extraction and dyeing of the yellow and red dyes of safflower. Absorption of dye solution extracted from safflower was changed by pH of solvent. In the case of yellow dyes, cotton and ramie weren't dyed regardless of pH of dye bath, but silks were significantly dyed at pH4. Raw silk showed better dyeability than refined silk. In the case of red dyes, cotton and ramie absorbed red dyes selectively, but silks absorbed yellow dyes more significantly than red dyes. Efficiency of extraction and dyeing of yellow dyes in acidic range were find out higher than that in neutral range. Red dyes was effectively extracted at pH11 and dyed at pH6.

Dispersant-free Dyeing of Polyester with Temporarily Solubilized Azo Disperse Dyes from Indole Derivatives

  • Lee, Jung-Jin;Lee, Won-Jae;Kim, Jae-Pil
    • Fibers and Polymers
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    • v.4 no.2
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    • pp.66-70
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    • 2003
  • Temporarily solubilized azo disperse dyes based on 1,2-substituted indoles were synthesized and characterized. Dispersant-free dyeing of polyester by using the synthesized dyes has been investigated. The colour yields of the dyes on the polyester fabric were found to be highly dependent on the dyeing pH, optimum results being obtained at pH 5. The dyes exhibited good to excellent fastness properties on polyester while lightfastness was moderate.

Dyeing Property of Acrylic/Cotton Fabric Blends (아크릴/면 혼방직물의 염색성)

  • Lee, Bong kyu;Park, Yoon Cheol;Kim, Jin Woo
    • Textile Coloration and Finishing
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    • v.7 no.2
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    • pp.17-23
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    • 1995
  • In order to study the dyeing property of acrylic and cotton blends with cationic and reactive dyes, staining on cotton of cationic dyes, stability of cationic dyes, and fastness properties in various conditions were investigated. The restlts obatined from this study are summarized as follows: 1. Cationic oxazine dyes showed good stability in comparison with cationic azo dyes. 2. Staining of cationic dyes on cotton was gradually increased with pH and neutral salt concentration, but decreased with dyeing time and dyeing temperture.

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Staining Properties of Waterborne PU Membranes (수분산 PU막의 염색 오염성)

  • 정동석;이문철
    • Textile Coloration and Finishing
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    • v.15 no.5
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    • pp.285-293
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    • 2003
  • Waterborne PU membrane was prepared from waterborne PU dispersion solution to investigate physical and staining properties. The staining properties of waterborne PU membrane with acid dyes and disperse dyes were observed. The physical properties of the PU membrane were investigated by X-ray diffraction and IR spectroscopy. The staining property of waterborne PU membrane for azo acid dyes is better than that of disperse dyes. X-ray diffraction peaks sharpened and tensile strain and stress increased with heat setting temperature.

Photocatalytic-Photochemical Reaction of Wastewater Dyes in aqueous Solution (염료폐수 용액의 광축매-광화학 반응)

  • 김삼혁;최칠남;정오진
    • Journal of Environmental Science International
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    • v.8 no.2
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    • pp.241-248
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    • 1999
  • The photocatalytic decolorization and photodegradation of wastewater contamininated with dyes such as methyleneblue tetrahydrate(MBT), methyl orange(MO), phenol red(PR) and the mixed dyes have been studied using a batch reactor in the presence of aerotropic and titania. Degussa P25 titanium oxide was used as the photocatalyst and proved to be effective for the dyes-degradation when irradiated with UV-light source emitting the wavelength of 253.7 nm in the presence of air. In addition to removing the color from the wastewater, the photocatalytic reaction simultaneously reduced the COD and optical density which suggests that the dissolved organic compounds have been photooxidized. The reaction rate of disappearance of the dyes were measured as a function of the irradiation times. The photooxidative procedure of the aquatic solution have the first order reaction-kinetics. The rate constants were increased in the order of PR < MBT < $gL^{-1}-TiO_2$ powder were irradiated with the UV -light source.

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Evaluation of dye-ability and harmfulness of the reactive dyes replacing the metallic acid dyes for wool

  • Park, Ji-Yang;Park, Young-Hwan;Kang, Tae-Jin
    • Journal of Fashion Business
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    • v.14 no.3
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    • pp.116-127
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    • 2010
  • Metal acid dyes are usually used to dye wool fabric to achieve high concentrated color and strong color fastness. However, metal acid dyes contain lots of heavy metal. That causes not only environmental pollution but also diseases to human. In this study, wool reactive dyes instead of metal acid dyes for wool, which are environmental friendly, are compared and analyzed in the evaluation system of their harmfulness, containing heavy metals and examined exhaustion rates and dyeing characteristics.