• 한국의류산업학회지
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• 제19권4호
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• pp.515-522
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• 2017

The natural dyeing industry has been faced with increasing demands of constant needs for environmentally and body friendly clothing products among modern consumers. Natural dyeing has attracted attention as a next-generation technology in green textiles. Dyestuffs need to be diversified for technological development activation in order to meet the increasing demands for natural dyeing. This study extracted dyeing solutions from the leaves of the Rose of Sharon (the national flower of South Korea) and investigated its dyeing properties for the development of various natural dyestuffs. This study investigates the dyeability of silk fabrics with Rose of Sharon leaves extract. Optimal conditions for dyeing of silk fabrics with the extract of Rose of Sharon were $40^{\circ}C/80min$ and $90^{\circ}C/60min$ with 100% concentration. Looking at the results, it showed the best K/S value at pH3, Sn pre-mordanting and Fe post-mordanting. Color fastness to washing, dry cleaning, rubbing and perspiration was good at grade 4-5 or 4. However, light fastness was observed in grade 2. In aspect of functional property, it showed an excellent result of 90% deodorization rate. In addition, its proven functionalities (deodorant properties) will help to produce high value added environment-friendly products. Those findings demonstrate the possibilities of the Rose of Sharon as an environment-friendly dye.

• 복식문화연구
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• 제17권6호
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• pp.1129-1140
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• 2009

The pine needles has been used as medicines and it is using as dyeing as well as food. It is distributed through 50% in Korean forest. The pine needles is related to antimicrobial activity, however, dyeing properties of the extract components and effects of them are not well known yet. To examine dyeing properties of the pine needles extract, various fabrics(nylon, silk, wool, and soybean) were dyed under different dyeing conditions, and mordanted with one of five mordants(Al, Sn, Fe, Cr, and Cu). Dye uptake, Colors and Colorfastness of the dyed fabrics were measured. By the K/S values, dye uptake of all the dyed fabrics enhanced as increasing dyeing temperature and dyeing time. The highest K/S values were obtained from the protein fiber(wool and silk) fabrics dyed with water extract at $100^{\circ}C$, and with ethanol extract at $90^{\circ}C$ for 80 minutes. Colors of the dyed fabrics showed variety of yellow, brown and green colors. Colors changed by using Cu, Fe and Cr mordants: Cr-mordanted fabrics into light green, Fe-mordanted fabrics into reddish brown, and Cu-mordanted fabrics into deep green in ethanol extraction. Dry-cleaning fastness of the dyed fabrics presented good to excellent except wool fabrics dyed with ethanol extract. Washing fastness of the dyed nylon and soybean fabrics were good to excellent but wool and silk fabrics showed average grades. Most dyed fabrics were poor to light fastness.

• 융합정보논문지
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• 제11권6호
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• pp.188-197
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• 2021

본 연구에서는 소목(Caesalpinia sappan L.) 분말을 활용한 모발 염색의 최적 조건을 결정하였고, 키토산 처리가 소목 분말의 모발 염색성에 미치는 영향을 조사하였다. 소목 분말의 혼합비율, 염색시간 및 온도에 따른 염색성을 확인한 결과 소목 분말과 물의 비율을 1:3(w/w)로 하여 40℃에서 60분 동안 처리하는 것이 모발 염색에 가장 효과적인 것으로 나타났다. 또한 키토산의 분자량, 처리 농도와 처리 순서가 소목 분말의 염색성에 미치는 영향을 확인한 결과 저분자량(~30 kDa)의 키토산을 1%(w/w)의 농도로 소목 분말 처리에 앞서 전처리를 하는 것이 염색성 향상 및 유지에 가장 효과적이었다. 결론적으로 모발 염색에 있어서 저분자량의 키토산은 매염제로서 소목 분말의 염색 효율과 유지력 향상에 크게 도움이 되는 것으로 판단된다.

• 한국의류산업학회지
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• 제15권1호
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• pp.138-146
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• 2013

Chemical compositions and biological functions of brown colorants extracted from pine bark(Pinus densiflora) have been studied. Dyeing test using multifiber fabrics with extracted colorants were preliminary carried out. Dyeing conditions and fastness tests of selected fabrics have been also studied. The brown colorants were produced 1.5% concentrations by solvent extraction from milled pine bark using methanol. The colorants were extracted with 80% methanol as best choice by a criteria of solid quantity and dyeability on fabrics. The chemical compositions were identified as mixtures of taxifolin epicatechin and procyanidin by LC/MS analysis. The brown colorants could be dyed not only natural fibers such as cotton, silk and wool but also synthetic fiber as nylon and semi-synthetic fiber as viscose rayon. Maximum K/S values was shown at 400 nm according to different fiber with color appearance of redish brown. Optimum pH and temperature of dyeing conditions was 4 and above $80^{\circ}C$, respectively. The brown colorants had a strong antioxidant activity compared to Butylated hydroxyanisole as standard and weak antimicrobial activity against E. coli. compared to kanamycin. Washing, rubbing, perspiration, dry cleaning and light fastness for cotton, nylon and silk dyed with the brown colorants were carried out by KS K method. Most of color fastness such as washing, rubbing, perspiration, and dry cleaning were represented as 4-5 grade. However, light fastness was reported as 2-3 grade. From this studies, brown colorants produced pine bark have a high potentials for natural dyeing on fabrics with antioxidant activity.

• 한국염색가공학회지
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• 제34권1호
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• pp.58-67
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• 2022

In this study, self-reinforced composite(SRC) was prepared using HDPE(High density polyethylene) fabric(2×2 plain) and LDPE(Low density polyethylene) film. The optimal conditions were derived by manufacturing specimens according to the temperature of 100 ~ 140℃ using a hot stamping at a pressure of 100bar for 10 minutes in order to find the optimal conditions for the SRC. The manufactured SRC was analyzed for tensile properties, compressive strength and shear strength through a universal testing machine(UTM). As a result of the measurement, the P3 specimen prepared by hot stamping at a temperature of 130℃ and a pressure of 100bar for 10 minutes was found to be higher than other specimens with tensile strength and tensile modulus of 210MPa and 19GPa, compressive strength 69MPa and shear strength 13MPa and it was considered to be optimal condition. Finally, the composite material according to the fabric structure was modeled using experimental values and the physical properties of the composite material according to the fabric structure were predicted using GeoDict and Digimat.

• Fibers and Polymers
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• 제7권4호
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• pp.344-351
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• 2006

This paper is intended to determine the optimal processing parameters applied to the dyeing procedure so that the desired color strength of a raw fabric can be achieved. Moreover, the processing parameters are also used for constructing a system to predict the fabric quality. The fabric selected is the nylon and Lycra blend. The dyestuff used for dyeing is acid dyestuff and the dyeing method is one-bath-two-section. The Taguchi quality method is applied for parameter design. The analysis of variance (ANOVA) is applied to arrange the optimal condition, significant factors and the percentage contributions. In the experiment, according to the target value, a confirmation experiment is conducted to evaluate the reliability. Furthermore, the genetic algorithm (GA) is combined with the back propagation neural network (BPNN) in order to establish the forecasting system for searching the best connecting weights of BPNN. It can be shown that this combination not only enhances the efficiency of the learning algorithm, but also decreases the dependency of the initial condition during the network training. Most of all, the robustness of the learning algorithm will be increased and the quality characteristic of fabric will be precisely predicted.

• 한국의류학회지
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• 제25권3호
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• pp.577-585
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• 2001

Dyeing properties of the colorants extracted from pomegranate hull on cotton fabric were investigated. Effects of dyeing conditions and mordanting on dye uptake, color change and colorfastness were explored. Cationic agent treatment was done for cotton to improve low dyeability in natural dyeing. In addition antimicrobial activity of the cotton fabrics dyed with pomegranate colorants was examined by the shake flask method. Pomegranate colorants showed low affinity to cotton fiber and its adsorption isotherm was Freundlich type. Therefore, hydrogen bonding was involved in the adsorption of pomegranate colorants onto cotton fiber. Mordants did not significantly increase dye adsorption. Pomegranate colorants produced mainly yellow color on cotton fabric. In order to improve dye uptake, cotton was cationized by treating with Cationon UK(quarterly ammonium salt) and chitosan. The cationized cotton with Cationon UK showed higher dye uptake and shorter dyeing time, compared with the untreated cotton. Chitosan treated cotton also showed high dye uptake, but chitosan was less effective compared with Cationon UK. Fastness to washing, perspiration, and rubbing was not improved by mordanting and cationizing treatment, but light fastness was increased by all mordants and cationic agent. As dye concentration increased, bacterial reduction rate was increased and mordants did not significantly increase bacterial reduction rate.

• 한국염색가공학회지
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• 제23권3호
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• pp.179-186
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• 2011

For the application of Jeju scoria scattered around the island as a natural dye, cotton fabrics were dyed with the dye and their properties were measured including dyeability, colorfastness, antibacterial activity, deodorization efficiency, ultraviolet protection, and far-infrared emission. The dyed cotton fabrics were in yellowish red and optimal dyeing conditions were obtained with a colorant concentration of 25%(o.w.b) at a temperature of $80^{\circ}C$ for the dyeing time of 120 minutes. The ratings of colorfastness to light, rubbing, perspiration, and washing were 8, 5, 5, and 4~5 respectively. After 15 wash cycles, colorfastness remained as much as 4~5 rating. The cotton fabric dyed with Jeju scoria demonstrated excellent antimicrobial activity and deodorization efficiency of 99.9% and 93.9% respectively. Ultraviolet protection factor was 50+. Far-infrared emission rate and far-infrared emission intensity were 90% and 362(W/$m^2{\cdot}{\mu}m$) respectively. The Jeju scoria can be introduced as a new colorant for the natural dyeing of cotton.

• 패션비즈니스
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• 제18권4호
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• pp.15-27
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• 2014

A natural colorant was extracted from Acer ginnala, Alnus japonica and gromwell as extractants. Studies have been made on the effects of the kind of extracts and dyeing/mordanting conditions on colorimetric changes of ramie fabrics. The color of fabrics tended to become darker as the numbers of dyeing process and mordanting process increased using three kinds of extracts. As the numbers of dyeing and mordanting increased, the ramie fabrics gradually increased to show reddish and bluish signs using Acer ginnala, Alnus japonica, and gromwell extracts(500ml and 1,000ml). In the case of 1,500ml of gromwell extracts, the ramie fabrics showed the color with more redness and yellowness. Color difference (${\Delta}E$) of dyed and mordanted fabrics increased as the numbers of dyeing and mordanting processes increased. The apparent colors of ramie fabrics using Acer ginnala were Y and GY. The Alnus japonica extracts produced Y and GY colors on ramie fabrics. With varying amount of gromwell extracts, the colors of dyed and mordanted fabrics were R, YR, GY, G, PB, P and RP, however, the main color was PB. It was concluded that the extracts of Acer ginnala, Alnus japonica and gromwell can be used as a natural dye producing black colors.

• 복식문화연구
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• 제16권1호
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• pp.158-165
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• 2008

The purpose of this study was to investigate the dyeing property and ultraviolet-cut ability on silk 100% and nylon 100% fabrics dyed with Rhus verniciflua extracts. This study was investigated K/S values, surface color, washing fastness, dry cleaning fastness and ultraviolet-cut ability of the silk and nylon fabrics dyed with Rhus verniciflua extracts under the various dyeing conditions. As mordanting were used Tin(II) Chloride dihydrate $(SnCl_2{\cdot}2H_2O)$, Copper(II) sulfate pentahydrate$(CuSO_5{\cdot}5H_2O)$, Iron(II)Chloride$(FeC_2{\cdot}4H_2O)$. pH was adjusted by sodium carbonate$(Na_2CO_3)$ and formic acid(HCOOH). The optimum dyeing temperature, dyeing time, and pH of the silk fabrics dyed with Rhus verniciflua extracts were $90^{\circ}C$, 100min, and in the nylon fabrics were $90^{\circ}C$, 45min. It were colored(munsell value) 6.4Y 7.5/4.1 in the silk fabrics and colored 4.3Y 6.6/5.9 in the nylon fabrics dyed with Rhus verniciflua extracts. Washing fastness and dry-cleaning fastness in the silk and nylon fabrics dyed with mordanting agent improved in $4{\sim}5$ grade. UV-A test showed that nylon fabrics a high rate of 92% with Rhus verniciflua extracts.