[article]
| Titre : |
Chrome-melamine syntan : a step towards developing fuller leather |
| Type de document : |
texte imprimé |
| Auteurs : |
P. Balasubramanian, Auteur ; Z. Mohammad Jamal Azhar, Auteur ; Rathinam Aravindhan, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 332-336 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Chrome
Cuirs et peaux -- Analyse
Eaux usées -- Analyse
Essais (technologie)
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Morphologie (matériaux)
Réticulants
Syntans
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The leather industry operates in stages. Many of the finished leather manufacturers source their wet blue leathers from various regions or tanners. In order to have uniformity of metal oxide content, almost all the leathers are rechromed. For this, the industry employs masked chromium(III) salts provided by the leather auxiliary industry in the form of complexes co-linked to phenol/ naphthalene condensates. Also, tanners who use hides/skins from ill fed animals treat their tanned substrate with melamine condensates, so as to get a preferential filling of the belly region. Metal ion complexes co-linked to melamine condensates are rather scarce. For the first time, this paper reports the application studies using a chromium melamine condensate devoid of formaldehyde as cross linker. The said product has been employed in rechroming and evaluated for multiple properties such as providing an equalization of chrome content and filling of belly region. Our studies clearly indicate a marked advantage of employing such a product in the place of commercial chrome syntans alongside melamine condensates, more so for ill fed cowhides. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Preparation of chrome melamine syntan - Characterization of SYN1 - Experiments employing SYN1 - Physical testing and hand evaluation of leathers - Morphological analysis - Analysis of rechrome liquor
- RESULTS AND DISCUSSION : Preparation of SYN1 - Characterization of SYN1 - Physical testing and hand evaluation of leathers - Morphological analysis - Analysis of wastewater |
| En ligne : |
https://drive.google.com/file/d/1mu1h5zouz_i6qIQN9YHkXALMDJP1-fTP/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24744 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 10 (10/2015) . - p. 332-336
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Chrome-melamine syntan : a step towards developing fuller leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 10 (10/2015)
