Water hardness as an important parameter of the fatliquoring process / Krzysztof Smiechowski in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 6 (11-12/2017) . - p. 296-302 Titre : Water hardness as an important parameter of the fatliquoring process Type de document : texte imprimé Auteurs : Krzysztof Smiechowski, Auteur ; Malgorzata Kowalska, Auteur ; Jan Zarlok, Auteur ; M. Lipiec, Auteur Année de publication : 2017 Article en page(s) : p. 296-302 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Douceur (toucher) Eau dure Emulsions Emulsions -- Stabilité Epaisseur -- Mesure Lixiviation Produits de nourriture du cuir Taille des particules Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The paper presents studies on the influence of selected parameters of water used in fatliquoring. Water of varying hardness (quantifies of calcium, magnesium, iron compounds and of chlorides) was used in the process. Properties of fatliquoring emulsions containing waters of different hardness were determined. It was noted that emulsions were less stable in the presence of eiectrolytes. Generally, the average particle size of prepared fatliquoring emulsions increased if the water phase contained : calcium, magnesium, iron compounds and chlorides. The presented studies on the affects on tanned hides confirmed the desirability of using low hardness water without iron and chlorides. Note de contenu : - Preparation of fatliquoring - Stablity of fatliquoring emulsions - Resistance of fatliquoring emulsions to electrolytes - Determination of fatliquoring emulsion particle size - Dispersion index - Leather fatliquoring process - Determination of fat content in bath after fatliquoring - Determination of fat content in leather - Determination of leather softness according to PH-EN ISO 17235 - Determination of leather sample thickness as per PN-EN ISO 2589 - TABLES : 1. Classification of water for tanning according to BASF - 2. Characteristic of water used to prepare fatliquoring emulsions - Methodology of wet-blue fatliquoring - 4. Stability of 10% emulsion and resistance to electrolytes (Nacl and chromium agent) - 5. Parameters of particle size distribution for fatliquoring emulsions at 20°C and 60°C - 6. Characteristics of the baths after fatliquoring - 7. Thickness and softness of leather samples tested - 8. Free fat content in leather - FIGURES : 1. Particle size distribution of emulsions Em (A)? Et (B), Ebt(C) determined at 20°C - 2. Particle size distribution of emulsions Em (A)? Et (B), Ebt(C) determined at 60°C. The emulsions produced at the two different temperatures (20 and 60°C) with distilled water (free from magnesium, calcium and iron compounds) were observed to have lower average particle sizes. In summary, a greater temperature and increased presence of magnesium, calcium and iron cause the average particle size to increase - 4. Impact of temperature, hardness and presence of iron compounds on average particle size En ligne : https://drive.google.com/file/d/1LJd8IEpiWFxeHGbbtdZ77uC1JTs28BK_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29668 [article]

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