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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]
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 -- LavageIndex. 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 processDOI : https://doi.org/10.1111/cote.12606 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12606 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38123
in COLORATION TECHNOLOGY > Vol. 138, N° 5 (10/2022) . - p. 485-494[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23613 - Périodique Bibliothèque principale Documentaires Disponible Comparison of the colour fading effects of sodium hypochlorite and ozone treatments / Idil Yigit in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)
[article]
Titre : Comparison of the colour fading effects of sodium hypochlorite and ozone treatments Type de document : texte imprimé Auteurs : Idil Yigit, Auteur ; Semiha Eren, Auteur ; Recep Karali, Auteur ; Fahri Yibar, Auteur ; Hüseyin Aksel Eren, Auteur Année de publication : 2021 Article en page(s) : p. 615-624 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
CotonLe 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).
Décoloration
Eau -- Consommation
Énergie -- Consommation
Hypochlorite de sodium
Mesure
Ozone
Produits chimiques -- Consommation
Textiles et tissusIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Colour fading is a method that is used to achieve a vintage look in textile goods. It is desired by customers in the textile market. Additionally, customers demand that these types of products are produced by environmentally friendly methods. In this study, sodium hypochlorite and ozone were used as laboratory-scale colour fading reagents on dyed cotton fabrics. Cotton fabrics were dyed with four different primary colours: red, yellow, blue and black. Dyed fabrics were subjected to ozone and sodium hypochlorite treatment under different treatment conditions. Ozone was chosen as an alternative for comparison and it was applied at fixed flow rate (5 L/min) and time (10 minutes). Colour differences, chemical oxygen demand, bursting strength and energy, water and chemical consumptions were measured. The surface morphology was characterised by scanning electron microscopy. We can conclude that ozonation is effective in discharging colour from dyed fabric samples, and the colour-fading effect is uniform, like in sodium hypochlorite treatment. It was observed that both processes are similar in terms of strength and surface modification. Results showed a 90% cost reduction, 85% water conservation and a 26% chemical oxygen demand reduction. Note de contenu : - MATERIALS AND METHODS : Materials
- METHODS : Dyeing - Fading - Fading by sodium hypochlorite - Fading by ozone - Fading effect measurement - Measurement of colour - Measurement of scanning electron microscopy - Strength and environmental impact measurement - Bursting strength tests - Chemical oxygen demand tests - Energy, water and chemical consumption comparisons
- RESULTS AND DISCUSSION : Measurement of colour - Scanning electron microscopy observations - Bursting strength tests - Chemical oxygen demand tests - Energy, water and chemical consumption comparisons
- Table 1 : A comparison of ozone and sodium hypochlorite fading
- Table 2 : Colorimetric data of ozone and sodium hypochlorite treatments
- Table 3 : The chemical oxygen demand (COD) loads of effluents according to fading treatment
- Table 4 : Energy, water, and chemical consumption comparisonsDOI : https://doi.org/10.1111/cote.12554 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12554 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36792
in COLORATION TECHNOLOGY > Vol. 137, N° 6 (12/2021) . - p. 615-624[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23068 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Cosmétique waterless : quels défis en formulation ? Type de document : texte imprimé Auteurs : Stéphanie Reymond, Auteur Année de publication : 2021 Article en page(s) : 34-46 Langues : Multilingue (mul) Catégories : Cosmétiques
Eau
Eau -- Consommation
Formulation (Génie chimique)Index. décimale : 668.5 Parfums et cosmétiques Résumé : Si des efforts sont menés régulièrement pour diminuer l'empreinte carbone et endiguer la pollution plastique, il ne faudrait pas en oublier l'eau, présente à plus de 80 % dans la plupart des formules, qui n'est pas une ressource illimitée. En réduisant sa présence dans les produits, on les allège, rendant leur transport moins polluant. Mais comment considérer la restriction de l'eau dans les formules : jeu d'enfant ou tour de force ? Note de contenu : - QUELLES SONT LES GALENIQUES DISPONIBLES ?
- LES FORMES SOLIDES : Les coulés à chaud - Les poudres granulées - Les poudres compressées
- LES FORMATS LIQUIDES : Les poudres libres - Les gels et huiles
- L'EMERGENCE DE NOUVELLES GESTUELLES
- ADOPTER DE NOUVEAUX REFLEXES EN FORMULATION
- LES PRINCIPALES DIFFICULTES : La technicité des formules - Le savoir-faire industriel - La sensorialité
- LES MULTIPLES OPPORTUNITES : Réduire les conservateurs - Valoriser des ingrédients naturels et durables - Promouvoir l'oléochimie - Réhabiliter les poudresEn ligne : https://drive.google.com/file/d/1WQ_A6w7lavI6XHYJw1MMFx5QZ4DQ1gjq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36052
in EXPRESSION COSMETIQUE > N° 70 (07-08/2021) . - 34-46[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22852 - Périodique Bibliothèque principale Documentaires Disponible Development of leather processing method in narrow pH profile : Part 2. Standardisation of tanning process / P. Thanikaivlaen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 3 (05-06/2001)
[article]
Titre : Development of leather processing method in narrow pH profile : Part 2. Standardisation of tanning process Type de document : texte imprimé Auteurs : P. Thanikaivlaen, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2001 Article en page(s) : p. 106-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eau -- Consommation
Liqueurs de tannage -- Analyse
Normalisation
pH
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Conventional methods employed in leather processing subject the skin or hide to wide variations and alterations in pH. This contributes to an increase in COD. TDS. chlorides, sulphate and other minerals in tannery waste waters.
A process sequence has now been explored to limit the pH range in leather processing from 4.0 to 8.0.
In the previous investigation, development of a dehairing process at pH 8.0 was demonstrated. In this investigation, an appropriate tanning system with adequate opening—up at a pH range of 4.0—8.0 has been investigated. The required fibre opening was achieved by means of lyotropic rather than osmotic swelling. The conditions for chrome tanning were standardised without conventional pickling.
A sequence of operations, viz., enzyme assisted zero-lime dehairing, lyotropic swelling for fibre opening and pickle-less chrome tanning provides leathers matching the functional performance of commercial upper leathers. The modified process leads to a substantial environmental benefit as observed in the reduction of chemical oxygen demand and total solids when compared to conventional processes. The process explored appears to be economy viable.Note de contenu : - EXPERIMENTAL PROCEDURES : Optimisation of opening-up of fibre bundles - Standardisation of tanning system - Selection of tanning system - Comparison of efficiency of selected tanning system with conventional tanning process
- RESULTS AND DISCUSSION : Standardisation of opening-up of fibre bundles - Standardisation of tanning system - Selected tanning system vs. conventional tanning system - Feasibility study
- Table 1 : Layer wise chromium content for pieces treated with enzymes and lyotropic agent (urea)
- Table 2 : Comparison of topological and stratigraphic distribution of chromium in control and experimental et-blue sides
- Table 3 : Comparison of characteristics of spherical particles in different chrome tanning systems
- Table 4 : Physical testing data of control and experimental leathers
- Table 5 : Analysis of spent chrome Iiquors
- Table 6 : Composite liquor analysis for conventional and experimental leather processing
- Table 7 : Comparison of water and time requirement for conventional and experimental leather processingEn ligne : https://drive.google.com/file/d/1fgtfGb6Cx6of1gWWKLw3QLB7i5opsjxE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40365
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 3 (05-06/2001) . - p. 106-115[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Getting recyclates into series production / James Mitchell in PLASTICS INSIGHTS, Vol. 113, N° 8 (2023)
[article]
Titre : Getting recyclates into series production : Series components with high recycled content for vehicles Type de document : texte imprimé Auteurs : James Mitchell, Auteur Année de publication : 2023 Article en page(s) : p. 86-87 Langues : Anglais (eng) Catégories : Coût -- Contrôle
Eau -- Consommation
Énergie -- Consommation
Gaz à effet de serre -- Réduction
Matières plastiques -- Recyclage
Matières plastiques dans les automobiles
Polycarbonates
Produits et matériaux recyclés
Terpolymère acrylonitrile butadiène styrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : A lower carbon footprint with as much performance as possible - this is the balancing act that automakers are trying to achieve for their vehicles. With the right materials, this can be successfully realized. On example is a joint project between Trinseo, an automative supplier, and a car manufacturer. Note de contenu : - PC/ABS compound as a drop-in solution
- High recycled content, same performance
- 24 percent less global warming potential
- Fig. 1 : The recycled material provides significant savings in several categories. These are higher for larger recycled contentEn ligne : https://drive.google.com/file/d/1mrGDbiaHZ0hCkCtQ-Z6zXfmbNUpo-q7L/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40563
in PLASTICS INSIGHTS > Vol. 113, N° 8 (2023) . - p. 86-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24338 - Périodique Bibliothèque principale Documentaires Disponible N° 78 - 09-10/2020 - Atlas de l'eau (Bulletin de COURRIER INTERNATIONAL HORS-SERIE) / Virginie Lepetit
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PermalinkSystematic analysis of material fluxes at tanneries / C. Konrad in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 1 (01-02/2002)
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