[article]
| Titre : |
Study of the mechanical characteristics of dried leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Soufien Azzouz, Auteur ; Naïma Benmakhlouf, Auteur ; Abdessatar Toumi, Auteur ; Hechmi Khedhira, Auteur ; Afif Elcafsi, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 253-259 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
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.
Cuir -- Séchage
Cuirs et peaux -- Propriétés mécaniques
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
It is generally recognized that, in an industrial process, drying is the most energy-consuming step. lt occurs several times in the leather processing. Leather production, accordingly, involves a crucial intensive energy use during this process to remove residual moisture. Additionally, the drying steps also necessitate substantial periods with respect to the total time required for tanning. Drying by hot dry air requires shorter times compared to moist air ; whereas the impact of the convective drying on the dried quality of leather remains unclear. Regarding these facts, the main objective of this study is to focus on improving the influencing factors — mainly the drying temperature, air velocity and humidity which impact on certain criteria in the leather's quality, especially the tensile strength, extension at break and tear. The leather used in the work is from cattle, a crust black leather, taken just prier to finishing. Experiments have been carried out at a temperatures varying between 40, 45, 50, 55 and 60°C, performed at three levels of air velocity , 1.5 and 2m/s) and with humidity at 15%, 30% and 45%. The results obtained make it clear that drying at 50°C with injected humidity of 15% and an air velocity of 1.0m/s seems the most optimal in our case, as it gives a better quality leather. |
| Note de contenu : |
- Samples preparation
- Drying unit
- Unit physical-mechanical tests
- FIGURES : 1. Schematic diagram of the drying loop - 2. Samples according to the three forms of resistance - Micrometer -thickness - 4. Electronic dynamometer
- TABLES : 1. Variety of leather samples tested - 2. Drying air conditions during experiments - 3. Physico-mechanical tests and standards applied - 4. Results of the physico-mechanical tests for all the tests of thickness e1 - 5. Physical-mechanical results for all the tests of thickness e2 - 6. Physical-mechanical results for all the tests of thickness e3 - 7. Optimal drying conditions for bovine leather |
| En ligne : |
https://drive.google.com/file/d/1kakLkyFe9x4FF_fIyWKU4nJRywI5qe42/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29241 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 5 (09-10/2017) . - p. 253-259
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