Effect of finishing density on the physico-mechanical properties of leather / Sevgi Nalbat in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 2 (03-04/2016) . - p. 84-89 Titre : Effect of finishing density on the physico-mechanical properties of leather Type de document : texte imprimé Auteurs : Sevgi Nalbat, Auteur ; Ersin Onem, Auteur ; Bahri Basaran, Auteur ; Ali Yorgancioglu, Auteur ; Onur Yilmaz, Auteur Année de publication : 2016 Article en page(s) : p. 84-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aniline Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Déchirure (mécanique) Densité Essais dynamiques Statistique Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Finishing is the process in which a polymeric coating is applied in order to improve the appearance and resistance of leather products. The applications at this stage greatly affect the use and appeal of the final products. In this study, the effect of different coating compositions on the physico-mechanical properties of leather was investigated. For this purpose, three different types of finishing formulations including semi-aniline, lightly pigmented and opaque finishes having different covering powers rated from light to heavy, respectively, were applied to the leathers and results were compared with uncoated counterparts. The findings of the study revealed that the application of lightly pigmented finishing statistically increased the tensile strength, single and double edge tear loads, and stitch tear resistance of the leather to a large extent. Semi-aniline and opaque finishing gave lower or, in some cases, statistically insignificant increases in the physico-mechanical properties of the leathers. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Application of finishing solutions - Conditioning and sampling of manufactured leathers - Physical tests - Statistical analysis - RESULTS AND DISCUSSIONS : Tensile strength and percentage extension - Single and double edge tear loads - Stitch tear resistance - Extension set En ligne : https://drive.google.com/file/d/16jPINv3-G7hC6KTY0YoHzk4qgPUaS2Kb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26092 [article]

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Emulsion based polymer/clay nanocomposites / Onur Yilmaz / Saarbrücken [Germany] : Lambert Academic Publishing (2012)

Titre : Emulsion based polymer/clay nanocomposites : Synthesis, characterization and application in leather finishing Type de document : texte imprimé Auteurs : Onur Yilmaz, Auteur ; Gürbüz Gülümser, Auteur ; Cornelia Vasile, Auteur Editeur : Saarbrücken [Germany] : Lambert Academic Publishing Année de publication : 2012 Importance : XVI-184 p. Présentation : ill. Format : 22 cm ISBN/ISSN/EAN : 978-3-659-19930-1 Prix : 79 E Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Chimie analytique Cuirs et peaux -- Finition Monomères Montmorillonite Polyacryliques Polymères en émulsion Polymérisation Rhéologie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Polymer/clay nanocomposites are a new class of reinforced polymer materials containing low quantifies of nanometric-sized clay particles which impart them better mechanical, thermal, electrical, barrier properties, chemical resistance, etc., making them valuable materials in many industrial applications such as; coatings, automotive, packaging, construction, and electronics, etc. They have great potential of increasing the fields of use which indicates them as likely to be involved in many various aspects of our lives in the near future. This book explains the preparation of polymer/clay nanocomposites via emulsion polymerization system and reveals a detailed study on the latex stability which arises as a challenge during nanocomposites latex preparations. The improvements of mechanical and thermal properties of the nanocomposite films as well as the rheological aspects of latexes which have crucial importance for coating applications are discussed. The book also includes a case application of the synthesized nanocomposite latexes as binders in leather finishing and the performance of the nanocomposite coatings is reported as well. Note de contenu : - I. LITERATURE SURVEY : Leather finishing and acrylic binders - General features of emulsion polymerization and acrylate based latexes - Preparation of polymer/clay nanocomposites by emulsion polymerization - Rheology of emulsions and nanocomposites - II. SYNTHESIS OF ACRYLIC/MONTMORILLONITE NANOCOMPOSITES VIA EMULSION POLYMERIZATION : Material and methods - III. RESULTS AND DISCUSSIONS : Preliminary experimental results - Nanocomposites including different types of clay Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36800

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A new defect on leather : microbial bio-film / B. H. Cadirci in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 4 (04/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 4 (04/2010) . - p. 129-134 Titre : A new defect on leather : microbial bio-film Type de document : texte imprimé Auteurs : B. H. Cadirci, Auteur ; Hasan Ozgunay, Auteur ; C. Vural, Auteur ; Onur Yilmaz, Auteur Année de publication : 2010 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biofilms Cuirs et peaux -- Défauts Microscopie électronique à balayage Réaction en chaîne par polymérase Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hides and skins are protein based materials containing high amounts of water, which makes them a nutritionally rich media ideal for bacterial growth. Being also the essential raw materials in leather manufacture, it is vital to carefully protect them against bacterial action especially in the early wet processing stages. It is well known that bacterial action can seriously damage the fiber structure of hides and skins. Hair slip, red discoloration and grain pilling are typical examples of bacterial action can lead to damage with subsequent defects on the tanned leather. The present study identifies a new defect caused by bacteria known as "biofilm" on hides and skins. For investigation of the observed defective areas, two techniques were used : Scanning Electron Microscopy (SEM), and Real-Time Polymerase Chain Reaction (RT-PCR). The latter technique, RT-PCR, is a novel rapid method for unique detection, identification and quantification of microorganisms. The results, obtained by applying these techniques, verified the presence of "microbial biofilm" on the leather. Note de contenu : - Material - Methods : Imaging the leather samples - Molecular biological analysis of leather samples - Total bacterial DNA isolation - Real-time PCR En ligne : https://drive.google.com/file/d/1lzl-nEsnCg7Zyv8GaiccDIXZlEQVcbDE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21998 [article]

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