Effect of the water content of padded cotton fabrics on reactive dye fixation in the pad-steam process / Jianfei Zhang in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 1 (02/2017) . - p. 57–64 Titre : Effect of the water content of padded cotton fabrics on reactive dye fixation in the pad-steam process Type de document : texte imprimé Auteurs : Jianfei Zhang, Auteur ; Xinqing Zhang, Auteur ; Kuanjun Fang, Auteur ; Dawu Shu, Auteur ; Jixian Gong, Auteur ; Xiuming Liu, Auteur Année de publication : 2017 Article en page(s) : p. 57–64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Fixation (chimie) Textiles et tissus -- Teneur en eau Thermométrie Vapeur d'eau Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of padded cotton fabrics with various water contents were obtained through vacuum dehydration. The effects of the water content on the fabric temperature variation during steaming, the colour properties, and the dye fixation rate (%F) were investigated. Dye distribution in the dyed cotton fibres was assessed. The influences of steaming time and sodium carbonate concentration on K/S value and %F of the dyed fabrics with low water content were also evaluated. The results indicate that reducing the water content of the padded cotton fabric to around 25.0% prior to steaming was favoured for reactive dyeing. The temperature of the wet fabric rose rapidly, the K/S value and %F were enhanced, and in addition the dye penetration into the dyed cotton fibres was sufficient. However, for padded fabrics with extraordinarily low and high water contents (e.g. 1.4% and 70.9% respectively), both the K/S value and %F were decreased. Furthermore, a white core phenomenon was evident for the fibres of the dyed fabric with a water content of 1.4%. Variation in the L* values was in line with the K/S values as the fabric water content varied. As expected, steaming time and sodium carbonate dosage can also affect reactive dye fixation greatly and should be determined accordingly for dyeing cotton fabric with low water content. Note de contenu : - EXPERIMENTAL : Vacuum dehydration and dyeing of cotton fabrics - Water content of the vacuum-dehydrated cotton fabric - Fabric temperature measurement during steaming - Colour measurements - Dye fixation rate - Fibre cross-section observation of the dyed cotton fabrics - RESULTS AND DISCUSSION : Temperature variation of the fabrics with different water contents during the steaming procedure - Effect of fabric water contents on colour strengths and dye fixation rates - Colorimetric parameters of dyed fabrics with various water contents - Dye distribution in the fibres of the dyed cotton fabrics - Steam fixation of padded cotton fabrics with a low water content DOI : 10.1111/cote.12253 En ligne : https://drive.google.com/file/d/1ff_H8nF6failV3fqARVsc5vyMLBVc-1x/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27881 [article]

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A study on the effect of bulk water content and drying temperature on the colour of dyed cotton fabrics / Muthusamy Senthilkumar in COLORATION TECHNOLOGY, Vol. 127, N° 3 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 3 (2011) . - p. 145-152 Titre : A study on the effect of bulk water content and drying temperature on the colour of dyed cotton fabrics Type de document : texte imprimé Auteurs : Muthusamy Senthilkumar, Auteur ; Natarajan Selvakumar, Auteur Année de publication : 2011 Article en page(s) : p. 145-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Teinture -- Fibres textiles Textiles et tissus -- Séchage Textiles et tissus -- Teneur en eau Index. décimale : 667.3 Teinture et impression des tissus Résumé : In the present study, the effect of various levels of bulk and free water content and its distribution on the colour of cotton fabrics dyed with direct dyes and their combinations were analysed. Twill and plain structures with two different parameters of fabric construction were chosen. The dyed samples were adjusted to different levels of wet pick-up, with water ranging from 50% to 125% on the bone dry weight of the fabric (odwf) to achieve various levels of bulk water content. Further, the residual moisture content of the samples was adjusted to 40–10% odwf by means of hot air drying at different temperatures to obtain different levels of free water content and its distribution. For the assessment of colour and its comparison, the parameters ΣK/S and inline image values were used. In order to bring out the true effect of moisture distribution and fabric structure, normalisation of dye uptake in the fabric based on weight and area were considered, respectively. The plain structures show a higher increase in colour than the twill structures when the bulk water content increases. At the same time, the fabric structures do not play a significant role, with increase in colour attributable to change in drying temperature. The findings reveal that the bulk water content, drying temperature and fabric geometry affects the colour of the fabric significantly. Note de contenu : - Effect of bulk water content on the colour of the fabric - Effect of drying temperature on the colour of fabric with residual moisture content - Effect of water content on the colour of fabrics with identical dye uptake - Effect of water content on the colour of fabric with different structures DOI : 10.1111/j.1478-4408.2011.00290.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00290.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12188 [article]

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