Chrome-reduced combination tanning for cleaner dyed sheep fur processing / Wei Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 11 (11/2015)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 11 (11/2015) . - p. 363-371 Titre : Chrome-reduced combination tanning for cleaner dyed sheep fur processing Type de document : texte imprimé Auteurs : Wei Ding, Auteur ; Yihan Chen, Auteur ; Ya-Nan Wang, Auteur ; Bi Shi, Auteur Année de publication : 2015 Article en page(s) : p. 363-371 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux de moutons Déchets -- Réduction Eaux usées -- Analyse Fourrures Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanning is essential for conventional processing of dyed sheep fur as it can provide fur with high hydrothermal stability suitable for dyeing of wool at a temperature around 70°C. However, a long float length and a big offer of chrome tanning agent (16 g/L) are required for the tanning process, which lead to poor uptake of chrome and excessive discharge of chrome in wastewater. In this study, reduction of chrome offer in dyed sheep fur production was investigated to develop a cleaner tanning technology. It was found that the even distribution of chrome and satisfactory dispersion of fur collagen matrix were achieved even though chrome tanning agent offer was reduced to 2 g/L and 4 g/L. But the shrinkage temperature of the furs was only 79°C and 85°C, respectively, which resulted in a sharp area shrink of fur in following high temperature dyeing. In the combination tannage using 10 g/L amphoteric organic tanning agent (TWT) and 2 g/L or 4 g/L chrome tanning agent, the shrinkage temperature of fur was higher than 90°C accompanied by a higher utilization of chrome. These combination tanned furs were capable of enduring dyeing process at 68°C for 8 h, and presented a high uptake of post tanning chemicals because they had an isoelectric point close to that of chrome tanned fur. More importantly, the physical properties of the combination tanned dyed furs were comparable to the dyed fur made by conventional chrome tanning using 16 g/L chrome tanning agent. Note de contenu : - EXPERIMENTAL : Materials - Conventional chrome tanning of sheep fur - Chrome-reduced combination tanning of sheep fur - Post tanning processes of sheep fur - Determination of chrome content in sheep fur and dyeing wastewater - Scanning electron microscope (SEM) analysis of sheep fur - Estimation of area yield of sheep fur - Uptake of fatliquor and dyestuff in post tanning processes - Determination of isoelectric point of sheep fur - Determination of physical properties of fur - RESULTS AND DISCUSSION : Effect of reduction of chrome offer on tanning performance - Effect of reduction of chrome offer on dyeing performance - Chrome-reduced combination tanning using TWT - Dyeing performance of chrome-reduced combination tanned fur En ligne : https://drive.google.com/file/d/19OtOSxVNM2feFFTWNzaprneqTyX2j1al/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24865 [article]

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