Research on microwave pad dyeing process for wool fabric

2017 ◽  
Vol 21 (4) ◽  
pp. 263-275 ◽  
Author(s):  
Xue Zhao
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Process Conditions ◽  
Colour Difference ◽  
Average Deviation ◽  
Sodium Bisulphite ◽  
Content Type ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Microwave Fixation

Purpose This paper aims to study microwave pad dyeing process for wool fabric. Influences of various dyeing process conditions including galactomannan dosage, urea dosage, sodium bisulphite dosage, pH value, microwave irradiation power, treating time and cold batching time before microwave fixation on K/S values were analysed. The colour yield, fixation and levelness were compared between microwave fixation and cold batching fixation. Design/methodology/approach Colour yield (K/S values) was calculated using a Datacolor SF650 colour measuring and matching instrument (10° standard observer, CIE D65 light source Measuring; Datacolor, USA) and was used to determine the depth of the shade of dyed wool fabrics. Levelness of dyeing was evaluated also using the Datacolor SF650 colour measuring and matching instrument by measuring average deviation (S), range (P) of the maximum and the minimum for lightness (L), chroma (C) and hue (h), and balanced colour difference (ΔE) at 20 specified uniform locations on the wool fabrics. The colour difference was calculated as per the equation ΔE=(ΔL2+Δa2+Δb2)1/2 as appearing in the Experimental section. Fixation was determined using a Datacolor SF650 colour measuring and matching instrument by measuring ratio the of K/S for wool fabrics that were rinsed, washed, neutralised and then dried, and wool fabrics that were dried after fixation without washing. The pH of the padding solution was evaluated using a PHSJ-4A PH meter (Datacolor, USA). SEM analysis was done on JEOL JSM-5600LV machine (JEOL Ltd, Japan). Findings This study is based on application of microwave technology in the processing of silk. Originality/value It was found in laboratory experiments that uniform dyeing and deeper colour can be achieved throughout the microwave pad dyeing process for wool by using galactomannan. The novel process could reduce the dyeing time and the energy consumption of the traditional cold pad-batch dyeing process for wool fabric.

Dyeing Properties to Wool Fabrics of Catechu Dye Purified by Micro-Filtration Membrane

2008 ◽  
Vol 12 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Xiuliang Hou ◽  
Li Wei ◽  
Xinlong Zhang ◽  
Huihui Wu ◽  
Qicheng Zhou ◽  
...  
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Color Fastness ◽  
Color Changes ◽  
Ph Values ◽  
Filtration Membrane ◽  
Wool Fabrics ◽  
Characteristic Values ◽  
The Stability ◽  
Different Levels

Catechu liquor, which is deep brown-red in color, was purified with a micro-filtration membrane and the stability of catechu dye to different levels of temperatures and pH were investigated in this paper. The effects of the dyeing conditions on color characteristic values and color fastnesses of the dyed wool fabrics were also investigated. The results show that the liquor of catechu dye is stable at pH values of 3-7 and its color changes to a deeper brown-red when its pH value is above 8. The preferable dyeing conditions for wool fabric with refined powder catechu dye are as follows: dyeing temperature of 100±C, pH value of 6.5 for the dye bath and catechu dye of 1-4% (o.w.f). The dyed wool fabric has good color fastnesses to washing, alkali perspiration and dry rubbing. However, its color fastness rating to wet rubbing is poor, ranging from 2-3. Further research will be needed on this aspect.

scholarly journals An investigation of dyeability of wool fabric with red cabbage (Brassica oleracea L. var.) extract

2017 ◽  
Vol 68 (02) ◽  
pp. 108-115 ◽  
Author(s):  
BENLI HÜSEYIN
Keyword(s):  
Ph Value ◽  
Metal Salts ◽  
Wool Fabric ◽  
Red Cabbage ◽  
Ph Values ◽  
Wool Fabrics ◽  
Color Yield ◽  
Brassica Vegetables ◽  
Dyed Fabrics ◽  
Brassica Oleracea L

In this study, woollen fabrics were dyed with the aqueous extract of fresh red cabbage leaves, containing kaempferol and quercetin as the main colorant species. Brassica vegetables are rich in polyphenols, flavonoids and glucosinolates. The dyeing was carried out with and without metal salts as mordants, such as KAl(SO4)2.12H2O, CuSO4.5H2O, FeSO4.7H2O and K2Cr2O7. Pre-and meta-mordanting methods were used in this study. Mordanted wool fabrics were dyed in a dyebath prepared with different pH values. The pH values of bath were 3, 5, 7, 9 and 11, respectively. Different colors and shades can be obtained within different pH values. The dyed fabrics were evaluated through color measurements and standard wash, perspiration, light and rub fastness tests. The dye absorbed by the fabrics and color properties were measured using a spectrophotometer. The color yield of dyed fabrics is expressed by K/S, and CIELAB (L*, a* and b*) values. The effects of mordant, methods of mordanting and pH value of the dye bath on the color values were studied. Finally, satisfactory results were obtained

scholarly journals Evaluation of Color Properties of Wool Fabrics Dyed with Calligonum comosum at Different Dye Conditions

2021 ◽  
Vol 11 (4) ◽  
pp. 4227-4242
Keyword(s):  
Antimicrobial Activity ◽  
Bath Temperature ◽  
Strength Analysis ◽  
Wool Fabric ◽  
Color Strength ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Natural Fabrics

In this search, the wool fabric was dyed with a natural dye Calligonum comosum (Callig. Co. dye); the dyeing process was applied under different conditions by changing dye bath temperature, time of dyeing, and pH of dye bath also using different mordants. Ultraviolet protection factor (UPF) was determined for each dyed wool sample. The role of these dying conditions on the via color strength analysis their effects on the reflectance spectra were investigated using the spectro-photometer tool, CIE tristimulus values, and the color parameters. The dye-ability strength and fastness to washing and perspiration properties of these wool samples dyed with (Callig. Co. dye) were carried out spectrophotometrically and evaluated the antimicrobial activity for blank and dyed wool fabrics via gram-positive and gram-negative was followed. The results showed that dyeing wool fabrics with (Callig. Co. dye) increased their protective abilities markedly, and they have effective protection against UV rays, also improving their antimicrobial activity. Moreover, Different conditions of the dye bath changed the optical properties noticeably. The present study will be useful for dermatologists advising patients regarding the UPF properties of clothes made from natural fabrics (wool) and dyed with natural colorants (Callig. Co. dye).

Research about the Dyeing Process Design of the Natural Rhubarb Dye on Wool Fabric

2011 ◽  
Vol 332-334 ◽  
pp. 17-22
Author(s):  
Wei Li ◽  
Lei Zhao ◽  
Qian Wen Wang
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Metallic Ions ◽  
Optimum Conditions ◽  
Aluminum Ion ◽  
Dyeing Process ◽  
Orthogonal Experiments ◽  
The Stability ◽  
Mordant Dyeing ◽  
Single Factor Experiment

In this paper，the extraction of rhubarb dye and the stability of rhubarb dye to heat and acetic was investigated. This paper investigated mordant dyeing of the wool fabric with metallic ions Fe2+，Al3+. And the single-factor experiment method and orthogonal experiments were used to study the optimum conditions of pre-mordant dyeing with aluminum ion. As a result, the stability of rhubarb dye to heat and acetic was very good. The optimum conditions of pre-mordant dyeing with aluminum ion was the bath ratio of 1:25, dyeing temperature of 90°C, ph value of 5, and the concentration of aluminum mordant was 5 percent of the fabric and the concentration of the natural dye rhubarb was 60 percent of the fabric.

Aqueous extraction of buckwheat hull and its functional application in eco-friendly dyeing for wool fabric

2019 ◽  
Vol 90 (5-6) ◽  
pp. 641-654 ◽  
Author(s):  
Wei Zhang ◽  
Jiming Yao ◽  
Peng Huang ◽  
Shuai Xing
Keyword(s):  
Textile Industry ◽  
Langmuir Model ◽  
Uv Protection ◽  
Wool Fabric ◽  
Synthetic Dyes ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Monolayer Adsorption ◽  
Reduction Stability ◽  
Agricultural Byproduct

As a cheap and abundant agricultural byproduct, buckwheat hull is expected to be applied in many fields such as textile, biotechnology, and medicine. In this paper, the physicochemical properties of buckwheat hull extraction (BHE) and its dyeing abilities for wool fabric with different eco-friendly mordants and methods were studied. The theoretical process, colorfastness, and UV-protection properties of the dyed wool fabric with BHE were investigated. The results showed that BHE solution had good thermal and reduction stability. The dyeing process of BHE on wool was in accordance with the Langmuir model and had uniform monolayer adsorption. Wool fabrics dyed directly or through a mordanting process demonstrated good washing colorfastness and acceptable crocking- and light colorfastness. The dyed wool fabrics with KAl2+ and meta-mordanting showed excellent UV-protection as well as exceptional antibacterial activity against Escherichia coli. Therefore, BHE presents a novel alternative for some synthetic dyes that are applied in the textile industry.

Research on Dissolvant-Based Infrared Yarn Dyeing Process of Polyacrylonitrile Fiber

2011 ◽  
Vol 308-310 ◽  
pp. 436-441
Author(s):  
Zheng Yu Zhang ◽  
Hong Xu ◽  
Chun Ling Zheng
Keyword(s):  
Organic Solvent ◽  
Benzyl Alcohol ◽  
Organic Solvents ◽  
Ph Value ◽  
Polyacrylonitrile Fiber ◽  
Process Conditions ◽  
Cationic Dye ◽  
The Core ◽  
Dyeing Process ◽  
Leveling Agent

Cationic dye is a special dye for polyacrylonitrile, but it is very difficult in dying through the core. In practice, the price of special leveling agent for polyacrylonitrile fiber is high, and uniform staining is poor. By mixing a number of organic solvents in the dye bath, we can improve the structure of fibers and its deep-dyed. In this paper, we use n-propanol, isopropanol and benzyl alcohol as organic solvent, by adjusting the pH value and the appropriate temperature, and with special depth and leveling agent for dyeing soaping fastness contrast, to find economically viable process conditions.

Flame Retardancy Modification of Wool Fabrics Using a Vinyl Phosphorus Monomer

2012 ◽  
Vol 557-559 ◽  
pp. 952-956
Author(s):  
Fang Jun Zhang ◽  
Jin Ping Guan ◽  
Guo Qiang Chen
Keyword(s):  
Weight Gain ◽  
Flame Retardancy ◽  
Graft Copolymerization ◽  
Oxygen Index ◽  
Ph Value ◽  
Technological Condition ◽  
Wool Fabric ◽  
Limiting Oxygen Index ◽  
Wool Fabrics ◽  
Water Media

In this paper, a flame retardant dimethyl-2-(methacryloyloxyethyl) phosphate (DMMEP) was applied onto wool fabrics by graft copolymerization technique in water media. The paper discussed the technological conditions of the formation of wool-g-DMMEP such as the pH value of reaction, reaction temperature and time etc. The weight gain of wool fabrics was chosen to be the indicator of optimized technological condition. The results showed that DMMEP treated wool fabrics have high limiting oxygen index(LOI). Wool fabric with weight gain 4.27% has high LOI 34.6%, which is hard ignited in air. Char residues of DMMEP treated wool fabrics are more rigid and solid.

Dyeing Property of Shikonin on Wool Fabric

2011 ◽  
Vol 233-235 ◽  
pp. 1306-1309
Author(s):  
Li Hua Lv ◽  
Chun Yan Wei ◽  
Fang Ye ◽  
Huan Zhang
Keyword(s):  
Factor Analysis ◽  
Wool Fabric ◽  
Process Conditions ◽  
Single Factor ◽  
Optimum Conditions ◽  
Dyeing Property ◽  
Specific Process ◽  
Wool Fabrics ◽  
Liquor Ratio ◽  
Single Factor Analysis

In this paper, wool fabric was dyed by Shikonin. The optimum conditions of dyeing wool fabric with Shikonin were obtained by the orthogonal and single factor analysis experiments. The specific process conditions are as follows: liquor ratio 1:40; dye concentration 80ml/L; pH 4; temperature 80; time 60min. The results indicated that fastness to washing and to rubbing of wool fabrics dyed with Shikonin was good and has reached more than three level.

scholarly journals Natural Dyeing of Cellulose and Protein Fibers with the Flower Extract of Spartium junceum L. Plant

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4091
Author(s):  
Zorana Kovačević ◽  
Ana Sutlović ◽  
Ana Matin ◽  
Sandra Bischof
Keyword(s):  
Negative Impact ◽  
Environmentally Friendly ◽  
Future Research ◽  
Wool Fabric ◽  
Dyeing Process ◽  
Protein Fibers ◽  
Wool Sample ◽  
C Value ◽  
Total Difference ◽  
Spartium Junceum

In this study, the natural dye was extracted from Spartium junceum L. (SJL) flowers and applied on cellulose (cotton) and protein (wool) fabric. Fabrics were pre-mordant with alum prior to the dyeing process. Considering the global requirements on zero waste and green policy, the dyeing process was intended to be as much as possible environmentally friendly but still effective. Therefore, mordant concentration was optimized due to the reduction of the negative impact. The efficiency of the dyeing process was investigated by examination of fabrics’ color characteristics and colorfastness to washing properties. In this paper, we have proved that the extracted dye from Spartium junceum L. is an acidic dye (mordant dye) which is more applicable for the treatment of wool fabrics. In this paper, it was proved that phytochemicals responsible for coloring are part of the flavonoids group. The UV absorption spectra of extracted dye show 4 bands in the region of λmax 224, 268, 308 and 346 nm which are ascribed to bands characteristic for flavonoids. Wool fabric pre-mordant with 3% alum and dyed shows great chromatic (C*) properties where C* value is in a range from 47.76 for unwashed samples to 47.50 for samples after 5 washing cycles and color hue (h°) is in a range 82.13 for unwashed samples to 81.52 for samples after 5 washing cycles. The best result regarding the colorfastness properties is shown by the wool sample treated with 3% alum after 5 washing cycles (total difference in color (Delta E*) = 0.87). These results confirm that metal (Al) from alum mordant make strong chemical bonds with wool substrate and dye since Delta E* values decrease in comparison to Delta E* values of the cotton samples treated the same way. The results revealed it is possible to reduce the concentration of mordant up to 3% and obtain satisfactory results regarding the colorfastness. Nevertheless, future research will go in the direction of replacing synthetic mordant with a more environmentally friendly one.

Study on the Enzyme Desizing Process for Cotton Fabric Using Ultrasonication

2011 ◽  
Vol 331 ◽  
pp. 261-264 ◽  
Author(s):  
Qi Ming Zhao ◽  
Shan Yan Zhang
Keyword(s):  
Cotton Fabric ◽  
Ph Value ◽  
Orthogonal Experiment ◽  
Research Result ◽  
Strength Loss ◽  
Cotton Fabrics ◽  
Optimum Process ◽  
Process Conditions ◽  
Fabric Strength ◽  
Enzyme Dosage

The auxiliary devices of ultrasonic treatment was designed and manufactured. The cotton fabric was desized using 2000L desizing enzyme with the conventional enzyme desizing process and ultrasonic enzyme desizing process respectively. Through the orthogonal experiment, the optimum process conditions of conventional enzyme desizing process and ultrasonic enzyme desizing process were determined. For the conventional enzyme desizing process, the optimized desizing conditions of cotton fabrics were: desizing enzyme dosage was 1.5g/l, temperature was 80°C, PH value was 6, and time was 60mins. The optimum process conditions of ultrasonic enzyme desizing process were: desizing enzyme dosage was 1.5g/l, temperature was 50°C, PH value was 6 and time was 45minutes. The research result indicates that, under the same desizing condition, ultrasonication can improve the desizing percentage and whiteness of cotton fabric, but the fabric strength loss increases slightly. And for the same required desizing percentage, the ultrasonic enzyme desizing process saved time and reduced the temperature of experiments compared with traditional enzyme desizing process

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