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Some bygone leathers and their reincarnations / Joe Dewhurst in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) Titre : Some bygone leathers and their reincarnations Type de document : texte imprimé Auteurs : Joe Dewhurst, Auteur Année de publication : 2014 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : - Himeji - Dongola - Latigo - Helvetia - Oil 'tannage' - Vellum - Parchment - Shagreen - Drumskins - Dog chews - Buffalo rawhide - Pickers - Buffalo Hammers - Scabbard leather - Sulphur in leather - Belting leather - Round banding - Textile leathers - Roller leather - Comber leather - Hydraulic leathers - Oil seal shoulders - Friction leather - Sole leather - Equestrian leathers En ligne : https://drive.google.com/file/d/1hQ_HOD1z_Fi4HDSrlqYn1YAkZiDM0iZH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22644 [article]

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Salt determination in salted bovine hide / Jaume Soler in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 248-251 Titre : Salt determination in salted bovine hide Type de document : texte imprimé Auteurs : Jaume Soler, Auteur ; Mercè Saborit, Auteur ; Josep Maria Morera, Auteur Année de publication : 2014 Article en page(s) : p. 248-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Cuirs et peaux de bovins Eaux usées -- Analyse Eaux usées -- Teneur en sels Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, a simple and inexpensive method has been developed to determine the amount of salt contained in a salted raw hide. Two different systems of analysis have been tested. In bath methods, salt is removed by stirring the hide with deionized water and analysing the resulting salt bath. The first method is based on the measurement of the chloride amount in the salt bath by the Mohr method. The second method is based on measuring the density of the salt bath. The second method has yielded very good results. Also, it does not require the use of chemical reagents and the necessary equipment is common in all tanneries. En ligne : https://drive.google.com/file/d/116-gK1XatNz8qTxv-GqJe7mpvedzmJcZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22645 [article]

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Dyeing properties of natural leather using red natural dyes / Sang Chul Lee in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 252-258 Titre : Dyeing properties of natural leather using red natural dyes Type de document : texte imprimé Auteurs : Sang Chul Lee, Auteur ; Eun Chul Shin, Auteur ; Won Ju Kim, Auteur Année de publication : 2014 Article en page(s) : p. 252-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Champignons microscopiques Cochenilles Colorants végétaux Cuirs et peaux -- Teinture Extraction (chimie) Frottements (mécanique) Photostabilité Plantes tinctoriales Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : An environment-friendly, non-toxic, red-dyed leather was developed using four naturel dyes -cochineal, lac, beet red, and monascus. The affects of the dye concentration, dyeing time, and temperature on the light fastness, rubbing fastness, colour difference, and K/S values (i.e., each dyed sample's apparent depth value) were investigated to find the hast natural dye for eco-dyeing the Ieather. When dyeing the leather red, the K/S value generally increased as concentrations of cochineal, monascus, lac, or beet red dyes were increased. However, the increase in the K/S value was substantially lowered when more than 5.0% o.w.l. (on the weight of Ieather) was used, indicating that the optimal dye concentration is 5.0 % o.w.l. A dyeing Urne of 100 minutes was found to be optimal because the K/S value stabilized aller 100 minutes. The use of cochineal 5.0 % o.w.l. resulted in a 9.18 RP (plum) and the use of lac 5.0 % o.w.l. resulted in a 9.52 RP. These resuits indicate colours that were the closest to red. Their ?E* values, which were the levelling property indicators of the leather, were 0.56 and 0.13, respectively, showing superior characteristics compared to the other two dyes. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and apparatus - Process of leather manufacturing and extraction of natural dyes - Measuring of physical properties - RESULTS AND DISCUSSION : pH change with natural dye content - Effect of dyeing time on colour - Effect of the concentration of natural dyes on colour En ligne : https://drive.google.com/file/d/1lYRs_tVWfcynfmT9IFH0GUGfzUE5c16R/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22646 [article]

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The relationship between water vapour permeability and softness for leathers produced in Poland / Krzysztof Smiechowski in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 259-263 Titre : The relationship between water vapour permeability and softness for leathers produced in Poland Type de document : texte imprimé Auteurs : Krzysztof Smiechowski, Auteur ; Jan Zarlok, Auteur ; Malgorzata Kowalska, Auteur Année de publication : 2014 Article en page(s) : p. 259-263 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaussures Cuir Douceur (toucher) Perméabilité Qualité -- Contrôle Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The study concerns testing of selected properties of leather produced in Poland particularly properties which are important for comfort. Shoe leathers were tested mainly for water vapour permeability and softness. Water vapour permeability tests were performed according to the new method which uses equipment made by the Radwag company (the idea was invented by the University of Technology and Humanities (UTH) in Radom, Poland), and which enables fast measurement in conditions similar to those under which the leather is used. In total, a range made by 8 Polish tanneries were tested. The results of the study showed that the majority of selections of leather produced in Poland is of very good quality. The water vapour permeability of the leathers ranged from 380mg/10 cm2/24h to 4930 mg/10cm2/24h (according to the method of UTH Radom). The relationship between softness and water vapour permeability was investigated. En ligne : https://drive.google.com/file/d/1fS5wmiRrcesSxPsDNoxtWCov3bG2MDs8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22647 [article]

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Application of N-(2-hydroxy) propyl-3-trimethyl ammonium chitosan chloride as an antibacterial and antifungal agent in wet-blue cattle hides in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 264-268 Titre : Application of N-(2-hydroxy) propyl-3-trimethyl ammonium chitosan chloride as an antibacterial and antifungal agent in wet-blue cattle hides Type de document : texte imprimé Année de publication : 2014 Article en page(s) : p. 264-268 Langues : Anglais (eng) Catégories : Antibactériens Antifongiques Cuirs et peaux -- Conservation Cuirs et peaux de bovins Evaluation Tests d'efficacité Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : N-(2-Hydroxy) Propy1-3-Trimethyl Ammonium Chitosan Chloride (HTCC) has better water-solubility than Chitosan (CS), and ils solubility no longer depends on the change of solvent pH, The minimum bactericidal concentration (MBC) of HTCC to Escherichia (E. coli) is 6g/L whereas the MBC for CS is 9g/L, and the value for Staphylococcus aureus (S. aureus) is 3g/L_ for HTCC and for CS it is 6g/L. The optimal pH of HTCC to E. coli is 8.0 whereas the optimal pH for CS is 6.0, and the pH value for S. aureus is 7.0 for HTCC whereas that for CS is 6.0. So HTCC has better antibacterial properties and solubility. Wet-blue cattle hides were treated with HTCC for antibacterial and antifungal effects. The inhibition against Escherichia Poli, S. aureus, Aspergillus figer, Aspergillus flavus and blue mould were investigated through an orthogonal design. The results showed that the treated wet-blue cattle hides possessed good antibacterial and antifungal properties. Correspondingly, the optimum treating conditions of the antibacterial process were a float of 100% with a dosage of 0.4% at pH4.0, below 50°C, reacting for 1.0 hour. The optimized antifungal process was a float of 150% with dosage of 0.2% at pH5.0, below 40°C, reacting for 2 hours. Note de contenu : - MATERIALS AND METHODS : Materials - Water solubility of HTCC - Antibacterial activity of HTCC to Escherichia coli and Staphylococcus aureus - Processing method for hides - Antibacterial test - Antifungal test - Data processing - RESULTS AND DISCUSSION : Water solubility of HTCC and CS - The antibacterial activity of CS and HTCC to E. coli - The antibacterial activity of CS and HTCC to S. aureus - Results of antibacterial tests - Results of antifungal tests En ligne : https://drive.google.com/file/d/1yuVLNXyS6TX5tHDxYop14SYrt9so6kOD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22648 [article]

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Application and properties of modified wook keratin composites as film-forming agent for leather finishing / Zeng Chunhui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 269-274 Titre : Application and properties of modified wook keratin composites as film-forming agent for leather finishing Type de document : texte imprimé Auteurs : Zeng Chunhui, Auteur ; Qi Lu, Auteur Année de publication : 2014 Article en page(s) : p. 269-274 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Composites Couches minces -- Propriétés mécaniques Cuirs et peaux -- Finition Ethanedial L'éthanedial ou glyoxal est un composé organique de formule brute C2H2O2 et de formule semi-développé O=CH-CH=O. Ce liquide de couleur jaune est le plus petit dialdéhyde existant. C'est aussi une forme tautomère de l'éthynediol (HO–C≡C–OH) . Frottements (mécanique) Hydroxyméthyle cellulose de sodium Laine Mélanges (chimie) Perméabilité Réticulation (polymérisation) Solutions (chimie) Traction (mécanique) Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A series of wool keratin/hydroxymethyl cellulose sodium (CMCNa/glyoxal composite membranes were prepared via solution blending and cross linking modification technology. The optimization of composite films preparation was critically investigated via orthogonal experimental design. Experimental results indicated that the cross-linking agent had a greater effect on the mechanical properties of films. Under the optimal condition (keratin/CMCNa weight ratio : 5.5, 0.3% glyoxal, reaction time : 1h, reaction temperature: 37°C), the composite membrane showed good tensile strength and maximum elongation, which can be used as film-forming agent in leather finishing. Moreover, in contrast to casein, the application properties of the leather finished by modified keratin composite film were measured : tensile strength increased by 11.3%, elongation at break improved by 25.7% as well as water vapour permeability by 3.76 %, and wet rub resistance fastness improved from 3 to 4. However, air permeability decreased by 15.1%. SEM and FTIR analysis verified that it has good compatibility, strong hydrogen bonds and covalent bonds formed between cross-linking agent and raw material molecules. The product might be great potentiel for application in leather finishing as film-forming agent instead of casein. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of wool keratin solution - Preparation of wool keratin/CMCNa/glyoxal composite membranes - Measurement of mechanical properties - Characterization - Application of modified wool keratin composite film in leather finishing - Determination of applied properties - RESULTS AND DISCUSSION : SEM analysis - FTIR analysis - Orthogonal experiment results - Influence of cross-linking agent on mechanical properties - Application testing En ligne : https://drive.google.com/file/d/1c5sNuqn9PQQCfw14uv6Ac4lbu0gDH0uN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22649 [article]

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The influence of research of leather's ecological properties on its products - Eco-design / Chen Jing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 6 (11-12/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 275-284 Titre : The influence of research of leather's ecological properties on its products - Eco-design Type de document : texte imprimé Auteurs : Chen Jing, Auteur ; Baozhen Cheng, Auteur ; Sun Shiyu, Auteur ; Zhang Xiaolei, Auteur Année de publication : 2014 Article en page(s) : p. 275-284 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bilan des émissions de gaz à effets de serre Cuir Cuirs et peaux -- Aspect de l'environnement Durée de vie (Ingénierie) Eco-conception Environnement -- Etudes d'impact Evaluation du risque Maroquinerie Produits commerciaux -- Cycle de vie Sacs à main Substances dangereuses -- Evaluation du risque Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ecodesign for leather products implies that the different potentiel environmental impacts of the main material, leather and finished products must be taken into account considering its whole life cycle, apart from the general design criteria (i.e. technical, functional, aesthetic or economic). In this paper, a bag made of leather was taken as a case study. A sustainability assessment methodology, given the major concern on carbon footprint (CF) and environmental risk assessment (ERA), were combined to derive complementaty criteria for the ecodesign of leather products, thus the effect of ecological properties of leather on finished products were analyzed. It was concluded that the key to leather product ecodesign is to choose leather. Leather's ecological properties directly determine their values of carbon footprint and environmental risk assessment. It was shown that, the process, clean-energy usage and the waste disposal have impacts on carbon footprint. Different countries and processes resulted in great gaps in leather's carbon footprint. Banned azo colorants have the most carcinogenic risk amongst the hazardous compounds used in the leather industry. Thus, the leather is crucial in the process of ecodesign for leather products, the ecological criteria and supplier selection are rigorous. On the premise of aesthetic design, the perspective provided by the indicators of different nature was balanced to accomplish a fair evaluation. The selection of leather produced under sustainable criteria and the reduction of the materials consumption was recommended, since the area requirements would be minimized and the absence of hazardous compounds would ensure safety conditions during the use stage. Note de contenu : - MATERIALS AND METHODS : Case study - Carbon footprint - Environmental risk assessment - RESULTS AND DISCUSSION : Inventory data - CF results - ERA - Analysis of ecodesign criteria En ligne : https://drive.google.com/file/d/17H7alEoDS0ZgV9LnNZAoAuSdBcFSJfs_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22650 [article]

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