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Rapid fiber opening process for skins : an approach for fail-safe chemical-free process / Jayanthi Durga in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 1 (01/2015)
[article]
Titre : Rapid fiber opening process for skins : an approach for fail-safe chemical-free process Type de document : texte imprimé Auteurs : Jayanthi Durga, Auteur ; Ammasi Ranjithkumar, Auteur ; Ramakrishnan Ramesh, Auteur ; Chellan Rose, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2015 Article en page(s) : p. 7-12 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbohydrases
Cuirs et peaux -- Analyse
Cuirs et peaux de chèvres
Epilage enzymatique
Travail de rivière (cuir)
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conventional beamhouse operations adopted by the global tanning industry are coming under the close scrutiny of the environmentalists on account of the possible adverse effect on human health and environment. Lime, which is used to the tune of about 10% on the weight of the raw hides and skins, in re-liming stage contribute to generation of large quantities of sludge, the disposal of which is a serious concern. Also the process duration to achieve the required fiber opening in the re-liming process is very long, ranging from 24-72 hrs for different substrates and end products. Enzyme based beamhouse processes are being advocated to overcome the problems associated with the conventional processes. However, enzyme based methods need greater control over process parameters to achieve satisfactory results in leather processing and avoid damage to the pelt. To overcome the problems associated with the conventional re-liming process, an attempt has been made in the present investigation to utilize cocktail of carbohydrases for fiber opening of hides and skins. Fiber opening at optimized concentration of the above enzyme has been studied for its efficiency on goatskins. A process using optimum quantity of enzyme led to fiber opening in 30 minutes. The efficacy of enzyme on rapid fiber opening of dehaired skin was studied at different experimental conditions of pH, time and enzyme concentration. The performance of the enzyme in the given experimental conditions was assessed by quantifying the removal of carbohydrate and proteoglycan and examining the fiber opening by scanning electron microscopic studies. Effect of enzyme on the final quality of the leather was evaluated by changes in chemical characteristics, physical properties and visual examination. Note de contenu : - EXPERIMENTAL : Optimization of enzyme concentration - pH optimization - Time course study - Carbohydrate assay - Estimation of proteoglycan - Scanning electron microscopic analysis - Physical testing and visual assessment
- RESULTS AND DISCUSSION : Effect of enzyme concentration of fiber opening - Effect of pH on fiber opening - Effect of time on fiber opening - Chromium content of wet blue leather - Scanning electron micrography - Physical and organoleptic propertiesEn ligne : https://drive.google.com/file/d/1exmz-jTGm0C0NTh0WpzBYlQtS-Ni_g4y/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22791
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 1 (01/2015) . - p. 7-12[article]Réservation
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