[article]
| Titre : |
The 1997 John Arthur Wilson memorial lecture : The evolution of the unhairing process as influenced by technological, economic and ecological considerations |
| Type de document : |
texte imprimé |
| Auteurs : |
Heinz-Peter Germann, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 84-92 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
For generations of tanners the beamhouse processes and especially the liming, unhairing processes and the opening up of the collagen fiber structure have been considered the most important operations in leather manufacture as so far as the quality and texture of the finished leather are concerned. Indeed, the results of improper liming methods can hardly be compensated by modifications of the bating or tanning process. More and more the character of leather is influenced by a great variety of post tanning and finishing operations, nonetheless, major faults originating in the beamhouse such as drawn grain, grain wrinkles or unremoved hair, cause trouble not only at this stage, but the gain damage, loose grain and lack of opening up becomng visible in the dry condition and are of decisive influence with regard to the leather quality. On the other hand it is well known, that the unhairing process of hides and skins, including the removal of the hair and epidermis as well as the opening up of the hide, are the most polluting operations in the tannery. Although there have been important developments and improvements made in the past few decades, we are still looking for a more desirable, cleaner unhairing technology.
Since the time of John Arthur Wilson a lot of progress has been achieved in the first major step in leather production including the reduction of processing time and even of effluent loadings. These developments only became possible because of a deeper understanding of the properties of keratin and collagen. In particular in the differents in chemical behaviour between these two kinds of proteins.
The studies of J. A. Wilson and his comtemporaries on the separation of hair and skin have to be recognized as pioneering work in this respect. |
| Note de contenu : |
- Unhairing processes
- Hair-destroying process
- Rapid hair-saving process
- Low-sulphide systems
- Enzyne unhairing
- Oxidative unhairing
- Continuous processing |
| En ligne : |
https://drive.google.com/file/d/1MHGECko8ohiCgJtMLd_jclhna-kgb-Ti/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7678 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 4 (04-05/1997) . - p. 84-92
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The 1997 John Arthur Wilson memorial lecture : The evolution of the unhairing process as influenced by technological, economic and ecological considerations in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 4 (04-05/1997)
