Influence of different products on wet finishing for leather properties and waste generation / Laisa Grassi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 3 (03/2024)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 3 (03/2024) . - p. 132-138 Titre : Influence of different products on wet finishing for leather properties and waste generation Type de document : texte imprimé Auteurs : Laisa Grassi, Auteur ; Luísa Gonçalves, Auteur ; Vânia Queiroz, Auteur ; Mariliz Gutterres, Auteur ; Caroline Agustini, Auteur Année de publication : 2024 Article en page(s) : p. 132-138 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Colorants -- Absorption Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Teinture Essais dynamiques Formulation (Génie chimique) Plan d'expérience Produits de nourriture du cuir Retannage Stabilité thermique Tannage végétal Tara et constituants C'est un petit arbre épineux avec des gousses plates rouge qui pousse dans les zones sèches du Pérou, Amérique du Sud. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is widely used for various applications. The processing involves a series of steps in which chemical processes and mechanical operations are carried out, with the addition of a series of products. Among the performance and quality parameters of the leather produced are the chemical and physical properties. The quality of the leather and the product obtained is influenced by its processing and the products used. Several studies are found in the literature on the effect of processing on leather properties. The present study brings the results of the influence of different products used in retanning, dyeing and fatliquoring (wet finishing) on the final properties of the leather. Physical tests of resistance to tearing, cracking and distension of the grain, the functional groups present in its structure, the thermal stability by DSC and TGA tests, dye uptake rate percentage and the remaining concentration of dye in the solution were used to evaluate the influence of different products on leather properties. It was observed that the parameter that influenced the applied force and the distension of the grain of the leather was the type of retanning agent used; the greater resistance to distension was obtained by Tara retanned leathers. As for the degree of dye uptake rate and remaining concentration of dye in the effluent, they were not affected by the studied parameters and all hides showed similar dye uptake. Regarding tear resistance, the type of grease was the parameter that had a significant effect on leather, higher resistance values were observed for leather greased with Coripol. The novelty of the work is in measuring how different dyeing, retanning and greasing products influence the properties of the final product, which is an advance towards greater cost-benefit in the choice of products to be used in the process. Note de contenu : - EXPERIMENTAL : Characterization - Experimental design - Mechanical properties - RESULTS AND DISCUSSION : Characterizations - Leather properties - Table 1 : Variable parameters and levels considered in the experimental design - Table 2 : Sample names in the experimental design - Table 3 : Executed formulation for post-tanning wet-blue to procedure with different finishing products - Table 4 : Mean values of applied force (N) and distention at grain crack (mm) for samples of all leathers analyzed - Table 5 : Results of the % of Dye uptake the leather - Table 6 : Results of remaining concentration test - Table 7 : Results of physical tests of resistance to progressive tearing DOI : https://doi.org/10.34314/383ntk96 En ligne : https://drive.google.com/file/d/11DgKVUVo1kigVuE1mlfpG1kf4RuPsIwH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40619 [article]

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