| Titre : |
Chrome-free chemistry |
| Type de document : |
texte imprimé |
| Auteurs : |
Karl Flowers, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 38-42 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents de tannage
Cuirs et peaux
Tannage chrome free
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Chromium-free leathers were the first forms of tanning through the use of oil and aldehyde tannage (such as chamois), vegetable tannage and through metal salts such as aluminium. New generation tannages have emerged in the last 30 years and are strong contenders for replacing chromium if the following criteria can be strengthened:
- The price moves to match the cost of chrome-tanned leathers (chromium-free retannage is high at the moment)
- The chromium-free intermediate can be transported like wet-blue (chromium-free crust is a really viable alternative)
- The dye performance (fixation) can be improved.
Chromium-free leathers have the highest biodegradability capability, and die natural white colour of the leathers make them easier to dye and colour match. Vegetable tannages are also chromium-free tannages and die new variants of vegetable tanning agents will be looked at (their fixation mechanism may make you rethink their chemistry). This article is meant to update die tanner and end user of leather as to how these chemicals fix to the collagen and how other chemicals could be potential second-generation chromium-free tanning agents. |
| Note de contenu : |
- Chromium-free hydrogen bonding
- Aldehydes
- Aldehydic reactions
- Other leaving group reactions
- Non-metal tannages
- The future
- Fig. 1 : The hydrogen bonding mechanism of polyphenol structures with collagen
- Fig. 2 : Deglycosylated oleuropein secoiridoid
- Fig. 3 : Polymerised glutaraldehyde and protein (Olde Damink et al., 1995)
- Fig. 4 : The typical reaction between an amine and an aldehyde group
- Fig. 5 : The typical reaction between an amine and an N-methylol group
- Fig. 6 : Modified triazine for wet-white |
| En ligne : |
https://drive.google.com/file/d/1oqQEgIFElp3c7Ou_-PDrHa6VIk7QgrDW/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41251 |
in INTERNATIONAL LEATHER MAKER (ILM) > N° 66 (07-08/2024) . - p. 38-42
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Chrome-free chemistry in INTERNATIONAL LEATHER MAKER (ILM), N° 66 (07-08/2024)
