| Titre : |
A cleaner chrome-free tanning regime : sulfonated urea-phenol-formaldehyde condensed polymer and ferrous sulfate tanning |
| Type de document : |
texte imprimé |
| Auteurs : |
Chen Hui, Auteur ; Guo Jun, Auteur ; Shan Zhi-Hua, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 18-24 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux
Cuirs et peaux -- Propriétés mécaniques
Formaldéhyde
Phénol
Polymères
Résistance des matériaux
Sulfate de fer
Tannage
Urée
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The potential of iron as a tanning agent has been known for a long time, but commercial exploitation has been limited because of concerns over loss of strength and darkening of color with time. To overcome these drawbacks, a combination tannage using ferrous sulfate and phenol-condensed polymers is proposed. Trials indicate that a combination tannage using sulfonated urea-phenol-aldehyde-condensed polymer (Sul.) after ferrous sulfate (Fe(II)) treatment produces favorable results. Shrinkage temperatures of up to 90°C were observed, with tensile strength of 238.3 kg/cm2, tear strength of 73.3 kg/cm, and elongation at break of 62.1%. The Sul.-Fe(II) tanned leather was lighter in color compared to iron tanned leather, and neither a darkening of color or a reduction in strength upon ageing was observed. The combination tanning system also has demonstrable environmental benefits compared to basic chromium sulfate (BCS)-Fe(II) tanning systems. The Sul.-Fe(II) combined system helps to reduce chemical oxygen demand (COD), and total solids (TS) content. Through experiments it is evident that COD, TS loads are reduced by 37.59% and 36.35%, respectively for Fe(II)-Sul. method compared to Fe(II) method. So the developed Fe(II)-Sul. regime not only has advantages in reducing pollution loads but also seems to be techno-economically viable. |
| En ligne : |
https://drive.google.com/file/d/1cy6pQrEl0xgcfOA3sPjck6v23csmx4bN/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10520 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 1 (01/2011) . - p. 18-24
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A cleaner chrome-free tanning regime : sulfonated urea-phenol-formaldehyde condensed polymer and ferrous sulfate tanning in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 1 (01/2011)
