| Titre : |
Leather ageing and hexavalent chromium formation as a function of the fatliquoring agent. Part I : chrome tanned leathers |
| Type de document : |
texte imprimé |
| Auteurs : |
Ramón Palop, Auteur ; Joan Parareda, Auteur ; Olga Ballùs, Auteur ; Agusti Marsal, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 200-204 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuir -- Effet du rayonnement ultraviolet
Cuir -- Teneur en chrome hexavalent
Cuirs et peaux -- Détérioration
Cuirs et peaux -- Effets de la température
Essais (technologie)
Jaunissement (défaut)
Produits de nourriture du cuir
Tannage au chrome
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The aim of this work was to evaluate the influence of eighteen different types of fatliquoring agents on leather ageing.
Temperature and ultraviolet light tests were conducted separately. The existence of a direct relationship between leather yellowing, diminution of shrinkage temperature, autoflammability and odour was confirmed.
There was also a non-linear relationship between the above parameters and the iodine index of the fatliquoring agents.
Hexavalent chromium was not formed when temperature tests were applied on neutralised and fatliquored leathers. The possible physicochemical mechanisms for this phenomenon are discussed.
The temperature test exerted greater influence than the ultraviolet light tests on the aforementioned parameters. |
| Note de contenu : |
- AIM OF THE WORK
- EXPERIMENTAL PROCEDURES : Materials and methods - Evaluation of the treated samples
- RESULTS AND DISCUSSION : Effect of temperature - Relationship between iodine number an the parameter evaluated
- Table 1 : Process details
- Table 2 : Fatliquoring agents used with their iodine index
- Fig. 1 : Influence of temperature on yellowing
- Fig. 2 : Influence of temperature on shrinkage temperature
- Fig. 3 : Yellowing and detanning mechanisms
- Fig. 4 : Plot of shrinkage temperature versus quantity of fixed chromium
- Fig. 5 : Influence of temperature on denaturing temperature
- Fig. 6 : Influence of temperature on odour
- Fig. 7 : Influence of temperature on surface area variation
- Fig. 8 : Influence of ultraviolet light on yellowing
- Fig. 9 : Influence of ultraviolet light on shrinkage temperature |
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in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 5 (09-10/2008) . - p. 200-204
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Leather ageing and hexavalent chromium formation as a function of the fatliquoring agent. Part I : chrome tanned leathers in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 5 (09-10/2008)
