Effect of temperature, relative humidity and UV radiation on wet-bright leather ageing / Anna Bacardit in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 5 (09-10/2017) . - p. 231-236 Titre : Effect of temperature, relative humidity and UV radiation on wet-bright leather ageing Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Teresa Mir, Auteur ; Joaquim Font, Auteur ; Rosa M. Cuadros, Auteur ; Lluis Ollé, Auteur Année de publication : 2017 Article en page(s) : p. 231-236 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Humidité Cuir -- Effet du rayonnement ultraviolet Cuirs et peaux -- Détérioration Cuirs et peaux -- Effets de la température Wet-bright (tannage) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Since leather is strongly affected by three main environmental parameters — temperature, relative humidity, and UV radiation — this study focuses on the effect that these three factors have on wet-bright leather ageing. Wet-bright leathers were exposed to weathering affects in a climatic chamber to 1) try and Identity the major variables affecting this weathering process; and 2) check for any possible interactions among these variables. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) were used as statistical tools for estimating the effects of the parameters. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Methodology - Evaluation - RESULTS AND DISCUSSION : Effect of weathering variables on physical and fastness properties of leather - Effect of weathering variables in the modification of leather composition - Changes in fibrous structure En ligne : https://drive.google.com/file/d/1q_wF3pgQIsq4VOHVp10sPcky7RefuI6C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29237 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
19275	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Study of the biodegradability of leather tanned with sodium aluminosilicate / Salvador Esquerra-Resa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 6 (06/2022)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 6 (06/2022) . - p. 251-261 Titre : Study of the biodegradability of leather tanned with sodium aluminosilicate Type de document : texte imprimé Auteurs : Salvador Esquerra-Resa, Auteur ; Salvador Esquerra-Dot, Auteur ; Alejandro Garcia, Auteur ; Angels Moreno, Auteur ; Teresa Mir, Auteur ; Anna Bacardit, Auteur Année de publication : 2022 Article en page(s) : p. 251-261 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumino-silicate de sodium Cuirs et peaux -- Biodégradation Cuirs et peaux de bovins Cuirs et peaux de moutons Essais (technologie) Formulation (Génie chimique) Maroquinerie Retannage Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Tannage végétal Tige de la chaussure Zéolites Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The leather industry transforms raw hides into leather by mechanical and chemical processes. The main chemical process is the tanning in which the fibers are stabilized and cannot putrefy. To this end, different chemicals can be used that are capable of forming crosslinkages between collagen molecules. In this sense, the most used products are: chromium salts, aluminum, vegetable tannins, synthetics, aldehydes, resins and silicates. In this work, a new biodegradable tanning process based on zeolites was studied in two steps. In the first one, a tanning process for sheepskins and cow hides was developed. In the second one, three types of retanning process to obtain shoe upper, vegetable and leather goods were studied. This new system allows to obtain leather that can decompose naturally in a relative short period of time. Leather tanned with this system shows similar values to the biodegradability of pure collagen. Specifically, with the retanning system used for shoe upper allows to obtain a 74.4% relative biodegradability compared to pure collagen. Note de contenu : - MATERIALS AND METHODS : Zeolites tanning process - Study of three types of retanning for the new tanning system - RESULTS : Zeolites tanning process - Study of three types of retanning for the new tanning system - Table 1 : Sheep skin tanning formulation - Table 2 : Cow hide tanning formulation - Table 3 : vegetable retanning formulation - Table 4 : Leather goods retanning formulation - Table 5 : Shoe upper retanning formulation - Table 6 : Physical and chemical tests results for vegetable - Table 7 : Physical and chemical tests results for shoe upper - Table 8 : Physical and chemical tests results for leather goods - Table 9 : Carbon content - Table 10 : Percentage of theoretical aerobic biodegradability - Table 11 : Percentage relative biodegradability DOI : https://doi.org/10.34314/jalca.v117i6.4966 En ligne : https://drive.google.com/file/d/1p5bnqsaxUqqhwhynwdWcfrEwRqUl1ZDs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37800 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23490	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Study of the chrome hexavalent content in commercial chromium salts / Anna Bacardit in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 1 (01-02/2020) . - p. 14-18 Titre : Study of the chrome hexavalent content in commercial chromium salts Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Maria Gonzàlez, Auteur ; Teresa Mir, Auteur ; Ricard March, Auteur ; Jordi Corbera, Auteur Année de publication : 2020 Article en page(s) : p. 14-18 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Sels de chrome -- Teneur en chrome hexavalent Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Three forms of chromium are used in industry: Cr(0), Cr(III) and Cr(VI). While chromium metal and Cr(III) ions are not considered toxic, hexavalent chromium is both toxic and carcinogenic. In the leather sector, chromium (III) is used as a tanning agent; however, under specific conditions, chromium (VI) can be formed in the leather post-production. Due to this reason, the objective of this work is to determine the possible hexavalent chromium content in four commercial basic chromium salts and the tendency of these salts to originate hexavalent chromium when applied to leather. The chromium salts studied do not originate Cr(VI) when applied to hide under optimum working conditions. However, it is demonstrated that the appearance of chromium (VI) may be due to bad practices during the tanning and/or post-tanning processes. Note de contenu : - Fig. 1 : Reaction between the crhome complexes and ionized carboxyl groups in the side chains of the collagen - Table 1 : Tanning formulation - Table 2 : Post-tanning formulation - Table 3 : Chemical dtermination of chromium (VI) content in chemicals - Table 4 : Chemical determination of chromium (VI) content according to ISO 19071 - Table 5 : Chemical determination of chromium (VI) content in leather - Table 6 : Post-tanning formulation - Table 7 : Chemical determination of chromium (VI) content in leather using modified formulations En ligne : https://drive.google.com/file/d/1XPRssh-TUmmPi0XKYw5ofQih5xTRG6gN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33538 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21508	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 3 / 3)