| Titre : |
A new pretanning agent for high exhaustion chrome tannage |
| Type de document : |
texte imprimé |
| Auteurs : |
Hongru Wang, Auteur ; Xiang Zhou, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 117-120 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents de tannage
Chrome trivalent -- Absorption
Composés organiques -- Synthèse
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Epuisement des tanins
Prétannage
Tannage au chrome
Température de retrait
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
A new pretanning agent (HTPA) for high exhaustion chrome tannage 2,4-di-(1-hydroxymethyl-1, 2, 4-triazole-5-thione)-1,5-phthalic acid and 2,5-di-(1-hydroxymethyl-1, 2, 4-triazole-5-thione) -1,4-phthalic acid, has been synthesized from pyromellitic dianhydride and thiosemicarbazide. Its reaction with pelts and its effect on chrome uptake have been studied by applying it to delimed sheepskins and goatskins. The results show that HTPA reacts mainly with the amino groups in collagen to form crosslinks and that the reaction depends on the pH, temperature, time and amount of HTPA. Pelt pretanned with HTPA possesses a higher shrinkage temperature than control pelts. Subsequent chrome tanning results in a significant increase in chromium uptake, thus the chrome offer in conventional chrome tanning can be reduced significantly. The handle and the physical properties of pretanned crust leather are not too different from those of control crust leather. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Materials - Synthesis Of HTPA - Reaction of HTPA with pelts - Pretanning with HTPA - Chrome tanning - ANALYSIS
- RESULTS AND DISCUSSION : Synthesis and structure of HTPA - Reaction of HTPA with pelts
- Table 1 : Effect of treatment with HTPA on shrink temperature of modified collagen
- Table 2 : Shrinkage temperature and chromium uptake of pretanned pelts
- Table 3 : Shrinkage temperature and chromium uptake of pretanned pelts
- Table 4 : Physical properties of the crust leather |
| En ligne : |
https://drive.google.com/file/d/1iQd5aKznXreALy8nhuu91xiQZt59ZxUG/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39271 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 3 (05-06/2005) . - p. 117-120
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A new pretanning agent for high exhaustion chrome tannage in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 3 (05-06/2005)
