| Autor: |
MAHDI, HAROUN, PALMINA, K., GURSHI, A., A.COVINGTON, D. |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Journal of Engineering Science and Technology, Vol 4, Iss 1, Pp 20-31 (2009) |
| Druh dokumentu: |
article |
| ISSN: |
1823-4690 |
| Popis: |
Ecological pressures on chromium have now forced the leather industry to look for possible alternatives. A vegetable- aluminum combination tannage has been studied, with special attention being given to intended final product. Aluminum is mineral tanning agents that are widely used to stabilize collagens in the leather industry. In this study, the crosslinking of vegetable and aluminum, with collagens, have been explored. This kind of chrome free tannage give us leathers with shrinkage temperature around 125oC, elongation at break 65.6%, tensile strength 38 N/mm2, and tear strength 98 N/mm. The chemical properties of the combination tanned leathers are found to be quite normal. Among the combination system evaluated, a vegetable pretannage followed by retannage with basic aluminum sulphate was found to produce stronger leather with the durable characteristics. In contrast, pre-tanning with aluminum possibly tightens the collagen fiber network, preventing high molecular weight vegetable tannins from interacting with collagen fibres. Optimal results were obtained when 10% (w/w) vegetable tannins (garad) and 2% Aluminum sulphate was used. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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