Effect of pigment-acrylic binder ratio on the surface and physical properties of resin finished leather / Suriya Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 1 (01/2024)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 1 (01/2024) . - p. 20-30 Titre : Effect of pigment-acrylic binder ratio on the surface and physical properties of resin finished leather Type de document : texte imprimé Auteurs : Suriya Madhan, Auteur ; Mishamo Wakaso, Auteur ; Sathya Ramalingam, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2024 Article en page(s) : p. 20-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Angle de contact Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Formulation (Génie chimique) Liants Polyacryliques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The current study attempts to investigate the surface phenomenon and physical characteristics of leather finished with brown pigment and different types of acrylic binders. Using the contact angle measurements of three different liquids on the above finished leathers and films, the surface energy and work of adhesion were evaluated. The pigment to acrylic binder ratio (PABR) for best adhesion of finish film on the leather surface was optimized using the contact angle goniometer. Different types of acrylic binder films were coated and their surface behaviour was studied. The crust leather was coated with different types of pigment-acrylic binder (Very Soft, Soft and Medium Soft) finish formulations. The contact angle of both the acrylic films and the PABR finished leathers were measured against Water, Dimethyl sulfoxide (DMSO) and Hexadecane (HD). According to the study’s results, the surface properties of finished leather were directly related to the degree of wetting. The PABR was found to be effective at 1:3 for very soft binder, 1:2.5 for soft, 1:2 for medium soft binders due to higher contact angle and lower surface energy values (γsv). At 1:3 and 1:2.5, the contact angle of very soft and soft binder leather was 82.62° and 83.45° and for medium soft binder it was 82.67° at 1:2 ratio. The surface energy values of optimized PABR of very soft binder (1:3) was 28.29 (mN/M), soft binder (1:2.5) was 27.50 (mN/m) and medium soft binder (1:2) was 29.27 (mN/m). The optimized PABR work of adhesion values of very soft binder, soft binder and medium soft binder was 82.15 (mJm-2), 81.11 (mJm-2), 82.09 (mJm-2). In order to correlate the observed surface properties with leather finish properties, finished leathers were tested for finish adhesion, vamp flexing value, water vapour permeability, wet and dry rub fastness. According to the water vapour permeability, soft and medium binder showed good permeation due to the uncovering of nanopores. But the adhesion, grain crack resistance and grain smoothness were higher in the case of the soft binder. Overall leather properties divulges that the pigment to binder ratio and the type of binder plays an important role in surface properties of the finished leather. This study enables us to determine the optimal PABR for effective finish properties to meet the required leather standards for various usage, as well as better utilisation of finishing chemicals. Note de contenu : - MATERIALS AND METHOD : Materials - method : Finish formulation preparation - Finished upper leather preparation - Acrylic binder film preparation - Determination of contact angle - Measurement of work of adhesion - Measurement of adhesion of finish - Determination of flexing endurance - Determination of wet and dry rub fastness - Determination of water-vapor permeability - Determination of physical strength characteristics - Determination of organoleptic properties - RESULTS AND DISCUSSION : Contact angle and surface energy and work of adhesion parameters of different acrylic binder films - Correlation between surface energy and work of adhesion parameters for various PABR of very soft binder - Correlation between surface energy and work of adhesion parameters for various PABR of soft binder - Correlation between surface energy and work of adhesion parameters for various PABR of medium soft binder - Water vapor permeability - Finish adhesion properties of finished leather - Organoleptic properties analysis - Table 1 : Characteristics of the binder chosen for finishing application - Table 2 : Finish formulations prepared at a varied concentration of different acrylic binder - Table 3 : Contact angle and surface energy and work of adhesion value for binder coated on a microscopic slide - Table 4 : Contact angle and surface energy and work of adhesion values for vaious PABR of very soft binder - Table 5 : Contact angle and surface energy and work of adhesion values for various PABR of soft binder - Table 6 : Contact angle and surface energy and work of adhesion values for various PABR of medium soft binder - Table 7 : Adhesion properties of optimum PABR of various binder - Table 8 : Organoleptic properties of optimum PABR of various binder DOI : https://doi.org/10.34314/jalca.v119i1.8291 En ligne : https://drive.google.com/file/d/1W93p1wv9mAcBRQf17cZQViw7-2kk6Jpb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40346 [article]

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