An evaluation of the properties of denim dyed with sulphur dyeing by elimination of pre-treatment processes in COLORATION TECHNOLOGY, Vol. 138, N° 5 (10/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 5 (10/2022) . - p. 485-494 Titre : An evaluation of the properties of denim dyed with sulphur dyeing by elimination of pre-treatment processes Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 485-494 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants au soufre Les colorants au soufre sont des colorants utilisés pour teindre de façon assez économique des fibres cellulosiques, principalement dans des nuances sombres (noir, brun, bleu foncé). Insolubles à l'état oxydé, ils sont rendus solubles par réduction à la soude caustique pour la teinture, dans un procédé analogue aux colorants de cuve, plus chers. Les colorants s'obtiennent par action du soufre sur des composés organiques, notamment sur le 2-4-dinitrophénol (Sulphur Black 1) ou le toluène-2-4-diamine et la 4-nitroaniline (Sulphur Brown 12). Colorimétrie Eau -- Consommation Énergie -- Consommation Essais dynamiques Jeans Solidité de la couleur Spécifications Stabilité dimensionnelle Teinture -- Fibres textiles Textiles et tissus -- Lavage Index. décimale : 667.3 Teinture et impression des tissus Résumé : In recent years, the low-environmental impact technology has given rise to new types of treatment in the textile industry. From the environmental point of view, mainly the textile dyeing process constitutes a significant pollution problem due to the variety and complexity of chemicals employed. Denim has been identified with indigo dyestuff throughout history. However, the percentage of warp yarn woven with sulphur-dyed denim (included in the denim group of products) has increased in recent years. The justification of this study is to create a new concept in denim fabric dyeing. Conventional denim fabric properties have been tried to be obtained with less process. A novel method with a less environmentally detrimental technique that limits the use of water, chemicals, and other resources has been developed to achieve traditional denim fabric qualities. The colour changes, tensile-tear strength, skew movement, dimensional stability, and the rubbing fastness values of fabrics dyed using these methods were examined comparatively. According to the results, the properties of fabric treated with the developed dyeing method, are very similar to those of the standard dyed fabrics. The tensile and tear strength values of the fabrics dyed using the reduced process method increased. The dimensional change and movement values of the fabric dyed with the new technique are higher. Fabric dyed with the conventional method has the highest K/S value but the lowest L* value. The greatest ΔE value was seen in fabrics with stone+hypo washing. The rubbing fastness value of the fabric dyed with the reduced process method was better. Note de contenu : - MATERIALS AND METHODS - RESULTS AND DISCUSSION : Results of tensile and tear strength - Results of colour measurements - Results of dimensional stability - Results of skew movement - Results of colourfastness to rubbing and areal density - Table 1 : Quality parameters of the yarns used in denim fabrics - Table 2 : Specifications of the denim fabric - Table 3 : Processes - Table 4 : Tests performed and standards - Table 5 : Descriptions of industrial denim washing techniques - Table 6 : Strength values of the fabrics - Table 7 : Measured CIELab values of samples - Table 8 : Colour differences between the samples of standard and reduced process methods - Table 9 : Colour fastness to rubbing and areal density of the samples - Table 10 : Water, electricity, and natural gas consumption of processes - Table 11 : Energy and environmental impacts of the process DOI : https://doi.org/10.1111/cote.12606 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12606 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38123 [article]

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Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge / Maryam Mudasir in COLORATION TECHNOLOGY, Vol. 138, N° 6 (12/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 6 (12/2022) . - p. 621-631 Titre : Denim dyeing effluent treatment by electrocoagulation for maximum reduction in indigo and sulphur black dye discharge Type de document : texte imprimé Auteurs : Maryam Mudasir, Auteur ; Sami Ur Rehman, Auteur ; Muhammad Fahad, Auteur ; Ifra Raza, Auteur ; Feroz Alam, Auteur Année de publication : 2022 Article en page(s) : p. 621-631 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants au soufre Les colorants au soufre sont des colorants utilisés pour teindre de façon assez économique des fibres cellulosiques, principalement dans des nuances sombres (noir, brun, bleu foncé). Insolubles à l'état oxydé, ils sont rendus solubles par réduction à la soude caustique pour la teinture, dans un procédé analogue aux colorants de cuve, plus chers. Les colorants s'obtiennent par action du soufre sur des composés organiques, notamment sur le 2-4-dinitrophénol (Sulphur Black 1) ou le toluène-2-4-diamine et la 4-nitroaniline (Sulphur Brown 12). Eaux usées -- Epuration Eaux usées -- Teneur en colorants Electrocoagulation Indigo Jeans Noir (couleur) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The waste effluents of two different dyes including one vat dye Indigo and one sulphur dye (Stay Black) were treated using continuous electrocoagulation (EC) technique at a denim dyeing plant. A coagulator reactor of 3 L capacity was designed to treat 7.9 L/h to 65.4 L/h of the dye wastewater. Process parameters like pH, flow rate, number of electrodes and material of electrodes were optimised to obtain maximum decrease in chemical oxygen demand (COD) and colour of the effluents before discharge. It was found that by controlling process parameters, COD can be reduced up to 79% and 90% for low concentrated Indigo and sulphur Stay Black dyes, respectively, with a reduction of colour value 98% and 70%, respectively, while for higher effluent concentrations EC efficiency was reported for 81% and 72.3% colour and COD removal, respectively, for indigo dye and 89.3% and 77.6% colour and COD removal, respectively, for sulphur dye. Hence results of the proposed study could provide important information to design a scale up large reactor unit to commercially apply on denim dyeing discharge and control pollution limits of sulphur and sulphates during denim dyeing. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Methods - RESULTS AND DISCUSSION : Effects of flow rates - Effects of pH of the wastewater - Effects of current density - Table 1 : Characteristics of different dyeing wastes at the denim dying plant - Table 2 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of diluted indigo dye effluents from fourth washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 11.88, TDS = 5340 mg/L, COD = 2740 mg/L, colour value = 0.5 g/L - Table 3 : Effects of flow rate on chemical oxygen demand (COD), pH, total dissolved solid (TDS) and colour values of concentrated indigo dye effluents from first washing stream after treatment through electrocoagulation (EC). Initial conditions of untreated sample is pH 10.63, TDS = 5300 mg/L, COD = 5413 mg/L, colour value = 1.100 g/L - Table 4 : Effect of changing pH on percentage colour and chemical oxygen demand (COD) removal, and zeta potential using nine stainless steel electrodes for indigo dye and six aluminium and three stainless steel electrodes for sulphur black dye - Table 5 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at low concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectively - Table 6 : Effects of electrocoagulation (EC) treatment on pH, total dissolved solid (TDS), chemical oxygen demand (COD) and colour values of indigo dye effluent and sulphur dark black effluent at high concentrations using all nine steel electrodes and three steel with six aluminium electrodes, respectively DOI : https://doi.org/10.1111/cote.12625 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12625 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38376 [article]

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Effect of atmospheric pressure plasma treatment on the desizing and subsequent colour fading process of cotton denim fabric / C. W. Kan in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 356-363 Titre : Effect of atmospheric pressure plasma treatment on the desizing and subsequent colour fading process of cotton denim fabric Type de document : texte imprimé Auteurs : C. W. Kan, Auteur ; C. W. M. Yuen, Auteur Année de publication : 2012 Article en page(s) : p. 356-363 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration Désencollage Jeans Plasma à pression atmosphérique Un plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère. Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse. Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this article, the performance of atmospheric pressure plasma treatment in the desizing of grey cotton denim fabric followed by an enzymatic colour fading process was studied. Four atmospheric pressure plasma processing parameters, namely, treatment time, ignition power, reactive gas (oxygen) concentration and jet distance were considered for desizing. In order to investigate the optimum conditions (based on weight change) for atmospheric pressure plasma treatment, an orthogonal array testing strategy was used. The optimum conditions for atmospheric pressure plasma treatment in this study were: treatment time, 5 s/mm; ignition power, 160 W; oxygen concentration, 1%; and jet distance, 3 mm. The level of importance of atmospheric pressure plasma processing parameters based on the orthogonal array testing strategy analysis was in the order: jet distance > ignition power > oxygen concentration > treatment time, and the effect of each processing factor is also discussed. In addition, the desizing effect induced by atmospheric pressure plasma treatment was compared with conventional enzyme desizing treatment. The resultant performance properties were also compared. After conducting desizing with atmospheric pressure plasma treatment, the cotton denim fabric was subjected to an enzymatic colour fading process. The colour fading effect was found to be more significant when compared with the conventional enzymatic colour fading process. Note de contenu : - EXPERIMENTAL : Denim fabric - Atmospheric plasma treatment on denim fabric - Enzyme desizing - Enzymatic colour fading process (cellulase treatment) - Measurement of weight change - Performance properties - Measurement of colour - Surface morphology - X-ray photoelectron spectroscopy analysis - Contact angle and wetting time measurement - RESULTS AND DISCUSSIONS : Optimum conditions for atmospheric pressure plasma treatment - Effect of jet distance - Effect of ignition power - Effect of oxygen concentration - Effect of treatment time - Verifying the optimum conditions - Surface morphology - X-ray photoelectron spectroscopy analysis - Contact angle and wetting time measurement - Performance properties - K/S value - CIE colour coordinates DOI : 10.1111/j.1478-4408.2012.00388.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00388.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15803 [article]

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Effect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics / Sabiha Sezgin Bozok in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 3 (06/2021) . - p. 209-216 Titre : Effect of silica based sols on the optical properties and colour fastness of synthetic indigo dyed denim fabrics Type de document : texte imprimé Auteurs : Sabiha Sezgin Bozok, Auteur ; Ramazan Tugrul Ogulata, Auteur Année de publication : 2021 Article en page(s) : p. 209-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 3-Glycidoxypropyltrimethoxysilane Colorimétrie Enrobage (technologie) Essais (technologie) Indigo Jeans Orthosilicate de tétraéthyle L'orthosilicate de tétraéthyle (TEOS) est un composé chimique de formule Si(OCH2CH3)4 ou plus simplement Si(OEt)4; l'abréviation TEOS (pour tetraethylorthosilicate) est généralement utilisée dans l'industrie du sol-gel, où il est intensivement étudié. La majorité des études en sol-gel pour des sols de silices ont utilisé ce produit comme précurseur. Le TEOS est généralement produit par alcoolyse du tétrachlorure de silicium SiCl4 dans de l'éthanol CH3CH2OH : SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl. Il est utilisé pour la réticulation de silicones et possède certaines applications comme précurseur du dioxyde de silicium SiO2 dans l'industrie des semi-conducteurs6 dans le cadre d'une réaction sol-gel. La propriété remarquable du TEOS est en effet de former du SiO2 par simple hydrolyse en libérant de l'éthanol CH3CH2OH : Si(OCH2CH3)4 + 2 H2O → SiO2 + 4 CH3CH2OH. Résistance à l'abrasion Résistance au lavage Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Sol-gel, Procédé Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The colour of denim fabric, which has a large share in the textile market, is an important parameter together with comfort properties during usage. While some users prefer the colour of denim fabrics to have different colours as they use them, others want to be provided with colour stability of the fabrics during use. In this study, the effect of a sol-gel technique on indigo dyed denim fabrics was investigated. The aim was to reduce the colour change that occurs in denim fabrics as a result of external factors by using silica-based coatings. The sols were prepared by using TEOS (tetraethylortosilicate) and different volumes of GPTS ((3-glycidyloxypropyl)trimethoxysilane) as precursors in acidic and alkaline conditions. Synthetic indigo dyed cotton denim fabrics were treated with the sols by applying the pad-dry-cure method. It was determined that the colour strength of the treated samples increased and the fabrics treated with the sols prepared in alkaline condition became darker compared to the sols in acidic condition. It is seen that the use of crosslinkers while preparing the sol could improve the rubbing and washing fastness of commercial denim samples. Note de contenu : - MATERIALS AND METHODS : Preparation of the sols and coating process - Testing methods - RESULTS AND DISCUSSION : SEM analysis - Colour measurements - Rubbing fastness - Wash fastness - Table 1 : Content of solutions and the sample codes - Table 2 : Colour difference values of the treated samples - Table 3 : Rubbing fastness of the samples - Table 4 : Washing fastness of the samples according to the standard DOI : https://doi.org/10.1111/cote.12521 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12521 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36087 [article]

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Effects of biowashing and liquid ammonia treatment on the physical characteristics and hand of denim fabric / In Yeol Lee in COLORATION TECHNOLOGY, Vol. 131, N° 3 (06/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 3 (06/2015) . - p. 192-199 Titre : Effects of biowashing and liquid ammonia treatment on the physical characteristics and hand of denim fabric Type de document : texte imprimé Auteurs : In Yeol Lee, Auteur ; Go Eun Jeon, Auteur ; Suk Rae Kim, Auteur ; Carl Bengelsdorff, Auteur ; Sung Dong Kim, Auteur Année de publication : 2015 Article en page(s) : p. 192-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniac Cellulases Une cellulase est une enzyme qui peut décomposer la cellulose. Les cellulases sont classées EC 3.2.1.4. Elles sont produites typiquement par des bactéries, levures et de protozoaires, qui jouent un rôle majeur dans la digestion des animaux, et transformation de la matière organique végétale en humus dans le sol. Elles ont aussi des applications biotechnologiques et industrielles. Jeans Teinture -- Fibres textiles Textiles et tissus -- Lavage Textiles et tissus -- Propriétés mécaniques Index. décimale : 667.3 Teinture et impression des tissus Résumé : The changes in the physical characteristics and hand of denim fabric through aftertreatments such as biowashing using only neutral cellulase enzyme and liquid ammonia treatment were investigated. The basic physical properties of denim were measured using the Kawabata evaluation system for fabric. The results showed that biowashing increased softness and created a fade-out effect with natural colour; however, it reduced strength and elastic recovery as a result of damage to the cellulose by the enzyme. On the other hand, liquid ammonia treatment gave improved physical properties, which can be attributed to fast and uniform swelling, but resulted in a darker colour. Therefore, a combination of liquid ammonia treatment with biowashing is desirable in order to obtain a good fade-out effect while achieving softness, smoothness, and elastic recovery. Note de contenu : - EXPERIMENTAL : Materials - Denim pretreatment - Denim aftertreatment - Measurement of physical properties - Calculation of objective hand value - Measurement of surface and colour change - RESULTS AND DISCUSSION : Tensile properties - Bending properties - Shear properties - Compression properties - Surface properties - Thickness and weight - Objective hand value - Total hand value - Z-score of physical characteristics - Change in surface and colour DOI : 10.1111/cote.12142 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12142 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24118 [article]

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Effects of ozone treatment on denim garment properties / Abir Ben Fraj in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

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Icons in denim / Mérigot Evelyne in L'INDUSTRIE TEXTILE, N° 1362 (06/2004)  

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A new image-based unlevelness index in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)  

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Optimisation of laser fading process in denim trousers : An industrial scale approach / Riza Atav in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

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Pigments fluorescents / Alex Zogu in L'INDUSTRIE TEXTILE, N° 1368 (01-02/2005)  

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Les silicones accèdent à l'âge adulte / Frédéric Tourneur in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 867 (06/2009)

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Technical study of the effect of CO2 laser surface engraving on the colour properties of denim fabric / C. W. Kan in COLORATION TECHNOLOGY, Vol. 126, N° 6 (2010)  

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Textile and food waste mixes biodegradation for the production of composite mycelium materials / Annah-Ololade Sangosanya in TECHNICAL TEXTILES, Vol. 65, N° 5 (12/2022)  

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Yarn cleaners for core yarn in CHEMICAL FIBERS INTERNATIONAL, Vol. 65, N° 4 (12/2015)  

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