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Mention de date : 10/2007
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Novel titanium (IV) tanning for leathers with superior hydrothermal stability / Biyu Peng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
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Titre : Novel titanium (IV) tanning for leathers with superior hydrothermal stability : III. Study on factors affecting titanium tanning and an eco-friend titanium tanning method Type de document : texte imprimé Auteurs : Biyu Peng, Auteur ; Dennis C. Shelly, Auteur ; Haojun Fan, Auteur ; Keyi Ding, Auteur ; Bi Shi, Auteur Année de publication : 2007 Article en page(s) : p. 297-305 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A novel eco-friendly titanium tanning system based on lactate-masked titanium sulfate solution as the tanning agent was developed. This approach offers enhanced tanning power, compared to previous system. The factors affecting this type of titanium tanning were investigated. The results showed that a conventional pickling process with high NaCl concentration was not suitable for titanium tanning while a pickle-less or salt-free pickling with titanium tanning increased shrinkage temperature (Ts) more than 10oC. The optimum tanning conditions were 7.5%-10% TiO2 offer (based on pelt weight with 65% moisture content), 30% titanium solution basicity and pH 3.5 tanning ending pH (basified by sodium bicarbonate or magnesium oxide). Proper pre-fatliquoring resulted in better titanium tanning agent penetration into the skin. But the pre- and post-treatment with multicarboxylates, acrylic resins and glyoxlic acid did not improve titanium combination with collagen. The shrinkage temperature of the leather was 102oC. The white titanium tanned leather had better strength and fullness than the chrome tanned leather control. But the spongy feel of titanium tanned leather was inferior to chrome tanned leather but superior to aluminum and zirconium tanned leather. The titanium absorption rate was more than 99% and no sodium chloride and/or ammonium salt were discharged. En ligne : https://drive.google.com/file/d/18MW-CoIem5meNGo-oG3EmzjdondA-nDt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3323
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 10 (10/2007) . - p. 297-305[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible Development of formaldehyde-free leathers in perspective of retanning : Part 1. Benchmarking for the evolution of a single syntan system / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
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Titre : Development of formaldehyde-free leathers in perspective of retanning : Part 1. Benchmarking for the evolution of a single syntan system Type de document : texte imprimé Auteurs : Palanisamy Thanikaivelan, Auteur ; C. Ram Mohan, Auteur ; Subramani Saravanabhavan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2007 Article en page(s) : p. 306-314 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The awareness of health risks due to the use of leather products is escalating day by day. The demand for eco-labelled leather and leather products is increasing in the developed countries. Eco-labeling concepts force the tanners to look into various options for developing eco-benign products. Formaldehyde is classified as a probable human carcinogen. In this study, an attempt has been made to produce leather without formaldehyde by employing formaldehyde-free syntans. A relative measure of performance of formaldehyde-free and formaldehyde based syntans has been done to test their ability to produce leathers with desired properties by employing these syntans individually. Three formaldehyde-free syntans (resin, acrylic and protein) and two formaldehyde based syntans have been chosen for optimization trials. Trials have been carried out to find out the optimal amount of individual syntans required for providing sufficient properties to the leather. Based on organoleptic and strength properties as well as other property evaluation, it has been found that 12 and 8% formaldehyde based syntans A and B and 8, 10 and 12% formaldehyde-free resin, acrylic and protein syntans are capable of providing sufficient properties to the leather. There seems to be a considerable relation between the nature of the syntans and properties imparted to the leather. Aromatic syntans tend to decrease the strength and softness properties of leathers with increasing offer. Relation between the fullness of leathers and offer of syntans has been substantiated through scanning electron microscopy. The leathers treated with formaldehyde-free syntans do not contain free formaldehyde when analyzed using standard procedure and hence do not possess any health risks. En ligne : https://drive.google.com/file/d/15iClkdMNH44GxjWG196MOaLkn6-kQ0cG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3324
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 10 (10/2007) . - p. 306-314[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible Development of regenerated protein fibers from a collagen-polyvinyl alcohol complex / E. C. Shin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
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Titre : Development of regenerated protein fibers from a collagen-polyvinyl alcohol complex Type de document : texte imprimé Auteurs : E. C. Shin, Auteur ; J. S. Heo, Auteur ; W. J. Kim, Auteur ; S. C. Lee, Auteur Année de publication : 2007 Article en page(s) : p. 315-321 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Regenerated protein fibers were wet-spun by collagen protein extracted from chrome shavings. A “pure” collagen protein extract of molecular weight _> 100,000 Da and chromium content <5 ppm was produced. To increase the spinning stability and physical strength of the fibers, the aqueous collagen solution was mixed with polyvinyl alcohol containing _<0.3 percent glutaraldehyde in a subsequent unique treatment. Good spin ability was obtained when the viscosity was _>1,000 cps. Optimal spin ability conditions were obtained at water temperature of 30~35°C in a coagulating bath containing a mixture comprising a minimum of 40 percent Na2SO4 and 1 M H3BO3. A water-resistant regenerated protein was eventually produced by chemical crosslinking using 15 percent Na2SO4, 0.5 percent glutaraldehyde, and 0.25 percent formaldehyde. The regenerated protein fiber had a specific gravity of 1.3 g/cm2, tensile strength of 1.32~2.0 g/d, and elongation of 29~38 percent. En ligne : https://drive.google.com/file/d/1DsDAG5UmYaDmHauxqjUkLzEF-ohREFRp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3325
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 10 (10/2007) . - p. 315-321[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible Use of novel tetrafluoroethene copolymer dispersions as protective finish for leather / J. Reiners in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
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Titre : Use of novel tetrafluoroethene copolymer dispersions as protective finish for leather Type de document : texte imprimé Auteurs : J. Reiners, Auteur ; T. Hassel, Auteur ; R. Maier, Auteur ; Stefan Wildbrett, Auteur ; Dietrich Tegtmeyer, Auteur Année de publication : 2007 Article en page(s) : p. 322-331 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Antisoiling finishing is currently one of the most challenging topics in leather technology. Light colored leather articles are in vogue for high end applications like automotive and furniture upholstery. The leather surface should resist any type of matter that soils while maintaining all physical and aesthetical properties. Resulting from a joint development project between DAIKIN and LANXESS, a new aqueous polymer technology for leather finishing based on tetrafluoroethene (TFE) copolymers is being introduced by LANXESS. In practice, formulations containing a TFE copolymer dispersion as the gloss binder, a specially designed matting agent and the appropriate additives are activated by a polyisocyanate and then applied on the leather surface using conventional spraying technology. A dual cross linking concept has also been developed for this new technology: Due to a chemical reaction, a fluorinated polyurethane network is generated on the leather surface thereby providing a permanently fixed protective coat and long lasting antisoiling effects. Compared to conventional systems, the resistance to any matter that soils is remarkably improved, whereas all physical properties remain unaffected. En ligne : https://drive.google.com/file/d/1v358XTZwTNepi3XHYEk9-v84iefY8jDT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3326
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 10 (10/2007) . - p. 322-331[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible Leather related collagen modeling : the challenges of modeling hierarchical structures / Lorenz Siggel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 10 (10/2007)
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Titre : Leather related collagen modeling : the challenges of modeling hierarchical structures Type de document : texte imprimé Auteurs : Lorenz Siggel, Auteur ; Rosa E. Bulo, Auteur ; Ferenc Molnar, Auteur ; Horst Weiss, Auteur ; Tilman Taeger, Auteur Année de publication : 2007 Article en page(s) : p. 333-336 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1jSbABonNRBaBjtvNDzhQtTzkJm3bD6IE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3328
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 10 (10/2007) . - p. 333-336[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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008304 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |