| Titre : |
Moisture-solid relationship accompanying drying of leather |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Komanowsky, Auteur |
| Année de publication : |
1990 |
| Article en page(s) : |
p. 6-18 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
By using mathematical principles of surface chemistry and knowledge about the structure of collagen and hides, it is possible to follow the events which occur during different stages of water removal from leather.
When water Is removed from the space between fibrils, lateral shrinkage of fibers occur. High-rate, longitudinal shrinkage of fibers takes place when the ends of successive molecules in the same row approach each other. Whereas this is observed to occur where the average moisture content drops from about 50% (moisture-free basis) to about 27%, mathematical evidence is presented which indicates that longitudinal shrinkage diminishes actually at about 9% moisture content when end-to-end contact between molecules is prevented due to accumulation of chrome in the region of d-bands of positively stained fibrils of collagen seen by electron microscopy. This may be one of the mechanisms through which tanning prevents bonding of molecules together and preserves elasticity and flexibility in leather. Calculations show that chemical or physical reaction between different parts of the hide structure should be small if the moisture content in every part of the hide or leather is kept above roughly 13%. Using published information, mathematical equations are derived describing shrinking and stressing of leather during drying. |
| En ligne : |
https://drive.google.com/file/d/1pJ72h_MBHwe38r8UGcmQWA_MCkL82qHr/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8603 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 6-18
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Moisture-solid relationship accompanying drying of leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
