Effect of syntan to fatliquor ratio on porosity and mechanical properties of wet-blue leather / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 4 (04/2017)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 4 (04/2017) . - p. 121-127 Titre : Effect of syntan to fatliquor ratio on porosity and mechanical properties of wet-blue leather Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; T. S. Bhuvansewari, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2017 Article en page(s) : p. 121-127 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de moutons Morphologie (matériaux) Porosité Syntans Vêtements en cuir Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 668.5 Parfums et cosmétiques Résumé : Different types of leathers with varied end applications can be made from same raw material. Post-tanning is the operation, which imparts the functional properties required for the final leather. The amount of post-tanning auxiliaries such as syntan (S) and fatliquor (F) used in the leather making, make it possible to convert the same animal skin into various leather types. In this work, the sheep wet-blue has been converted into garment (S:F 1:2) and upper (S:F 2:1) leather by varying the S to F ratio. Here, an attempt has been made to study the influence of S to F ratio on the porosity and mechanical properties of garment/upper leather with respect to sheep wet-blue as a control. Thermoporometry results show that the reduction in pore distribution of garment leather with respect to wet-blue leather is about 62.3% and that of upper leather is 83%. Capillary flow porometry results show that the maximum distribution of through pore throat diameter of upper leather is found to be shifted towards 0.1-0.2 µm from 0.3-0.5 µm (wet-blue leather), whereas in the case of garment leather pores are uniformly distributed in the range of 0.1-0.5 µm. The influence of post-tanning auxiliaries on air permeability reduction is higher for upper leather (83%) than garment leather (41%). Morphological analysis using SEM shows that loosely packed arrangement of wet-blue leather becomes cemented fiber structure in case of upper leather and uniform fine fiber splitting has been observed for garment leather. Tensile strength of wet-blue leather is decreased by about 23% when it is converted into upper leather and that of garment leather is increased to about 16%. Note de contenu : - MATERIALS AND METHODS : Sampling for analysis of porosity - Sampling for analysis of mechanical properties - Thermoporometry analysis - Capillary flow porometry analysis - Scanning electron microscopic analysis - Mechanical properties - RESULTS AND DISCUSSION : Thermoporometry analysis - Capillary flow porometry analysis - Scanning electron microscopic analysis En ligne : https://drive.google.com/file/d/1Q1bFVx4FC4qMqE5wrJLTGhMdetf-ahHR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28361 [article]

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