| Titre : |
Melamine glyoxal resin as a retanning agent - preparation and application |
| Type de document : |
texte imprimé |
| Auteurs : |
Xie Heng, Auteur ; Sun Qingyong, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 17-22 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Caractérisation
Cuir -- Teneur en formaldéhyde
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Formaldéhyde -- Suppression ou remplacement
Fourier, Spectroscopie infrarouge à transformée de
Mélamine glyoxal
Retannage
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Amino resins have played an important role in the manufacture of leather due to their outstanding filling and dyeing properties. However, a traditionally prepared amino resin usually contains free formaldehyde, which is strictly restricted in leather products. With increasing awareness of potential health problems with formaldehyde, there is a growing demand for formaldehyde-free leathers in the global leather market. In this study, a formaldehyde-free amino resin was synthesized by using glyoxal as condensing agent, and its retanning properties were investigated. It was found that the glyoxal can be used to replace formaldehyde to synthesize an amino resin, and the optimal reaction conditions were that the molar ratio of melamine to glyoxal was 1:6, reaction temperature was 333K and reaction time was 3 hours.
Retanning experiments with the prepared amino resin indicated that its retanning properties, including fullness, softness, general appearance of the leather and mechanical strength, are better or equal to those that of a traditionally prepared amino resin. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Materials - Preparation of MG - Characterization of MG - FTIR analysis
- APPLICATION PERFORMANCE OF MG : Physical and mechanical tests - Organoleptic properties - Colour differences - Shrinkage temperature determination - Free formaldehyde content in leather
- RESULTS AND DISCUSSION : Orthogonal experimental results - FTIR analysis of MG resin - Application experiments of MG (trial 1)
- COMPARISON WITH COMMERCIAL AMINO RESIN : Comparison of organoleptic properties - Comparison of physical and mechanical properties - Comparison of chemical indexes of leather and spent liquor - Comparison of dyeing properties |
| En ligne : |
https://drive.google.com/file/d/1zoUkMI38NeJsf4Tz9PVrvw1r38ou6drW/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21010 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 1 (01-02/2014) . - p. 17-22
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