[article]
| Titre : |
Novel eco-friendly approaches for the production of uphosltery leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Samir Das Gupta, Auteur |
| Année de publication : |
2009 |
| Article en page(s) : |
p. 92-102 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
In recent years, considerable research has been done to replace chrome tanning with alternative tanning systems. But there are very few methods that are environmentally friendly and cost effective that give leather with performance as good as chrome tanned leather. DasGupta and Debchoudhury reported systems based on oxazolidine and mimosa that gava satisfactory leather with high shrinkage temperature. Vitolo et al reported a tara-aluminum sulphate tanning system as an alternative to traditional chrome tanning. But these are not yet commercially accepted. In this reported a tara-aluminum sulphate tanning system as an alternative to traditional chrome tanning. But these are not yet commercially accepted. In this report, a novel eco-friendly approach for the production of upholsteryleather is given that avoids pickling. The leather is pretanned after bating at pH 7.5-8.5 with 2% oxazolidine E (1-aza-3,7-dioxabicyclo-5-ethyl (3,3,0) octane) to obtain shrinkage temperature around 75-80°C for hides and 80-85°C for skins. These pelts are simultaneously of after treated with 2-3 % replacement syntan. These pretanned hides and skins may be split and/or shaved at this stage, without any difficulty, to the required thickness. This provides opportunities for a tanner to either chrome tan with 4-5% chrome powder 25/33 (25% Cr2O3 content / 33% basicity) following the LASRA ThruBlu systemor organically tan the shaved hides as reported earlier by DasGupta and Debchoudhury.
The splitting and shaving at this stage has the added advantage of lowering the amount of chrome use, very low chrome in effluent, flatter grain, higher area yield of the final leather, and biodegradable chrome-free shavings. This would considerably minimize the disposal problemfor a tannery. The details of these methods are given with performance data to show that the leather satisfies all requirements of modern upholstery leather. The mechanism of the tanning is explained with atomic force microscopy and mass spectroscopy data and the improvement of effluent discharged from a tannery is discussed. |
| En ligne : |
https://drive.google.com/file/d/10wo0UNZSZTpPYzi09wuMGO7FOVo67XHu/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4480 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 3 (03/2009) . - p. 92-102
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Novel eco-friendly approaches for the production of uphosltery leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 3 (03/2009)
