[article]
Titre : |
A new leather-making process for meeting eco-label standards : Processing of goatkins |
Type de document : |
texte imprimé |
Auteurs : |
Subramani Saravanabhavan, Auteur ; B. Chandrasekaran, Auteur ; Palanisamy Thanikaivelan, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao, Auteur |
Année de publication : |
2006 |
Article en page(s) : |
p. 192-205 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Index. décimale : |
675 Technologie du cuir et de la fourrure |
Résumé : |
Eco-labels are used to guarantee the consumer a product meets certain minimum standards relating to its environmental impact during production, use or disposal, and to distinguish the product from competitors in a positive way. The leather industry, especially in developing countries, has provided economic benefits but suffers from a negative image due to the environmental impact pf tannery wastewaters, solid wastes and gas emissions. The conventional method of tanning involves a 'do-undo' process and subjects the skin or hide to wide variations in pH (2.8 - 13.0). This results in the emission of significant pollution loads, such as biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), total solids (TS), sulfates, chlorides and chromium. In the approach demonstrated here, hair and flesh removal, as well as fiber opening, have been achieved using biocatalysts at pH 8.0; tanning using optimized pickle and basification-free chrome tanning followed by post-tanning using environmental benign chemicals. It has been found that the extent of hair removal and opening up of fiber bundles are comparable to that of control leathers. This has been substantiated through scanning electron microscopic (SEM) analysis and softness measurements. Performance of the leathers is shown to be on par with control chrome-tanned leathers through physical and hand evaluation. The shrinkage temperature of the leathers obtained from this optimized pickle and basification-free chrome tanning system is above 120°C. The process also exhibits significant reduction in BOD, COD, TDS and TS loads by 90, 92, 89 and 90%, respectively. Processed leathers satisfy the key parameters of both the Indian eco-mark standard and the German eco-label standards (Oko-Tex, SG (Schadstoff Gepruffl), LGR (Lederinstitut Gerberschule Reutlingen)). Finally, the developed process seems to be economically viable. |
En ligne : |
https://drive.google.com/file/d/1l8FviqEK27Dlu4ePtejFM4mzqk0JIDKl/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4013 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 5 (05/2006) . - p. 192-205
[article]
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