Comparison of the effect of the tropical test on both chrome-tanned and wet-white upholstery leather / Lluis Ollé in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 3 (05-06/2011)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 3 (05-06/2011) . - p. 109-115 Titre : Comparison of the effect of the tropical test on both chrome-tanned and wet-white upholstery leather Type de document : texte imprimé Auteurs : Lluis Ollé, Auteur ; M. Jorba, Auteur ; Joaquim Font, Auteur ; Anna Bacardit, Auteur Année de publication : 2011 Article en page(s) : p. 109-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Effet du rayonnement ultraviolet Cuir -- Effets du climat Cuir dans les automobiles Cuirs et peaux -- Biodégradation Cuirs et peaux -- Détérioration Cuirs et peaux -- Effets de la température Tannage au chrome Wet-white (tannage) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Automotive upholstery leather can undergo extreme environmental that may cause premature ageing. Leather is strongly affected by three main environmental parameters : temperature relative humidity and UV radiation. UV radiation causes colour change, fading, surface erosion, loss of gloss, etc. Increasing the levels of UV radiation represents a primary accelerating factor for leather ageing. Temperature produces thermal oxidation degradations, subsequent reaction rates and acceleration of other weathering reactions. Relative humidity acts as a chemical reagent in many hydrolytic weathering reactions and as a physical stressor of leather Additionally, when relative humidity is over 65 % leather is susceptible to mould attack. The aim of this work is to compare the effect of the tropical environment exposure on both chrome-tanned and wet-white upholstery leather. Note de contenu : EXPERIMENTAL PROCEDURES : Materials - Methodology - Evaluation of sample RESULTS AND DISCUSSION : Physical degradation due to tropical environment - Chemical degradation due to tropical environment exposure - Biological degradation due to tropical environment exposure En ligne : https://drive.google.com/file/d/1dVABD2ajwZLkKZhcZk-UDFe5fxS3dXfL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11879 [article]

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Design of scaffolds for biopelt from tanning sector by-products / Silvia Sorolla in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 5 (09-10/2010)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 5 (09-10/2010) . - p. 190-199 Titre : Design of scaffolds for biopelt from tanning sector by-products Type de document : texte imprimé Auteurs : Silvia Sorolla, Auteur ; M. Jorba, Auteur ; X. Marginet, Auteur ; Joan Carles Castell, Auteur ; Lluis Ollé, Auteur ; Anna Bacardit, Auteur Année de publication : 2010 Article en page(s) : p. 190-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux Culture in vitro Eau -- Consommation -- Réduction Fibroblastes Peau artificielle Tags : 'Synthèse  de  peau  artificielle'  'Culture  in  vitro'  'Matrice  extracellulaire  tridimensionnelle'  Fibroblaste  'Réduction  la  consommation  d'eau' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of the present work is to generate by in vitro technology scale a biomaterial with similar characteristics to genuine leather. The generation of an in vitro tissue from bovine fibroblasts is carried out on the basis of a scaffold to generate a three-dimensional extra-cellular matrix (3D-ECM). Finally, the scaffolds have to be suitable for biomaterial production at lab scale using a bioreactor with specific culturing conditions. In a further step, new methodologies to stabilize the new biomaterial were investigated. The biomaterial generation involves the elimination of the heavy water consumption steps in conventional leather manufcature. Since this biopelt doesn't need to be subjected to the beamhouse steps previous to stabilization, a reduction of 50-60 % in water consumption is achieved. Consequently, pollution in wastewaters is minimized. En ligne : https://drive.google.com/file/d/122y0zpfD02F-G0rcUiJn887ZtNZNlcus/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9998 [article]

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Inter-laboratory study on formaldehyde determination by HPLC / Joaquim Font in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 3 (02/2008)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 3 (02/2008) . - p. 53 - 61 Titre : Inter-laboratory study on formaldehyde determination by HPLC Type de document : texte imprimé Auteurs : Joaquim Font, Auteur ; Agusti Marsal, Auteur ; Sara Cuadros, Auteur ; M. A. Juàrez, Auteur ; E. Verdù, Auteur ; M. Jorba, Auteur ; M. Reyes, Auteur ; T. Rius, Auteur ; S. Viera, Auteur Année de publication : 2008 Article en page(s) : p. 53 - 61 Note générale : Bibliogr. Langues : Américain (ame) Résumé : The colorimetric determination of formaldehyde in a water extract of a leather sample is a procedure that has been criticized because of possible interferences of other aldehydes and coloured substances that could interfere in the spectrophotometric detection. The measurement by liquid chromatography HPLC is an alternative method that was developed some years ago. This method is more sophisticated but more selective and free of the aforementioned interferences. It is not sensitive to coloured extracts. With the implementation of HPLC equipment in many laboratories, this choice has become feasible in our sector. The process is selective. Formaldehyde is separated and quantified as a derivative from other aldehydes and ketones by liquid chromatography. The free-formaldehyde and formaldehyde which is hydrolysed during extraction to yield free-formaldehyde are detected by this method. The sample is eluted with water at 40°C. The eluate is mixed with 2,4 dinitrophenylhydrazine, whereby aldehydes and ketones react to yield the respective hydrazones. These are separated by means of a reversed-phase HPLC method, detected at 350 nm and quantified. The aim of this work is to present a collaborative inter-laboratory study coordinated by the Igualada Leather Technology School and carried out with four other laboratories that had previously implemented the HPLC method or that were planning to do this. Determination of formaldehyde content in leather was carried out in each laboratory in accordance with prEN ISO 17226:2005 - HPLC Standard, developed by the Committee CEN/TC 289. Part 2 of the ISO 5725 Standard (Basic method for the determination of repeatability and reproducibility of a standard measurement method) was applied to examine the results. The study proved successful. The HPLC method achieved very reproducible results between laboratories. This work has also demonstrated that other aldehydes, glutaraldehyde included, do not interfere in the chromatographic method. The use of a PDA detector increases the confidence of the detection of formaldehyde in leather samples. En ligne : https://drive.google.com/file/d/1E16gTqYgL-Wrer6A0lzBSboae2jF1S61/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2572 [article]

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Waste water reutilization in the leather industry using membrane technology / J. Roig in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 4 (04/2009)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 4 (04/2009) Titre : Waste water reutilization in the leather industry using membrane technology Type de document : texte imprimé Auteurs : J. Roig, Auteur ; Joaquim Font, Auteur ; X. Marginet, Auteur ; M. Jorba, Auteur ; Lluis Ollé, Auteur ; Anna Bacardit, Auteur ; Rita Puig, Auteur Année de publication : 2009 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper documents a technical feasibility study of tannery wastewater which was reclaimed (treated) and reutilized in tannery leather making processes. The studied waste water was processed in the waste water treatment plant owned by Igualada tanners (IDR), in Spain. The objectives included reduction of city fresh water consumption by the tanners of this city. A pilot plant using membrane technology, determined to be the most appropriate technology in this case, was installed at the IDR wastewater treatment facility. It worked in three consecutive stages : pre-treatment by sand filtration, subsequent ultrafiltration, and then reverse osmosis. The reclaimed water was of the highest quality, superior to any other water currently available to city tanners. The right sides of 24 calf hides were fully processed with the reclaimed water, while the left sides of the same hides were processed with softened tap water. Three different leather articles were produced. No significant differences were detectable between the left and right sides, neither organoleptically nor analytically. En ligne : https://drive.google.com/file/d/1QE82tggKZBBH7WjgwGV7Jq_i1-pTFhh9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4807 [article]

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