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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Use of liposomes as auxiliary products in hide dyeing process. Influence on the organoleptic and mechanical properties of dyed leather / Agusti Marsal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 4 (04/2003)
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Titre : Use of liposomes as auxiliary products in hide dyeing process. Influence on the organoleptic and mechanical properties of dyed leather Type de document : texte imprimé Auteurs : Agusti Marsal, Auteur ; Albert M. Manich, Auteur ; M. de Castellar, Auteur ; Jaime Cot, Auteur ; D. Martinez, Auteur Année de publication : 2003 Article en page(s) : p. 132-138 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Reduced dye penetration constitutes a problem in the dyeing process of thick hides. Liposomes have been successfully used as auxiliary products in wool dyeing as well as in sheepskin dyeing giving rise to dyeings of highlevelness and very soft leathers. In this work, the possible application of some liposomes as auxiliary products in the dyeing process of 2 mm hides has been studied. The effect of the liposome use on dye penetration, on dyeing levelness and on dye exhaustion has been compared with the influence exerted by other commercially available chemicals such as: a chemical based on a sodium salt of a condensed naphthalenesulfonic acid and a chemical based on an ethoxylated fatty amine. Two pro-liposome formulations, from different supplier, containing soybean phospholipids were considered. Some parameters were improved by the use of liposome formulations when compared with the results obtained with the other chemicals considered. En ligne : https://drive.google.com/file/d/1P2RhHGijDP7xsJlhYysYjR8htDFIwCnJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4115
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Code-barres Cote Support Localisation Section Disponibilité 001586 - Périodique Bibliothèque principale Documentaires Disponible Use of long-chain synthetic phenolic antioxidants to produce chromium-tanned leather without risk of hexavalent chromium formation / Irene Compte in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 10 (10/2023)
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Titre : Use of long-chain synthetic phenolic antioxidants to produce chromium-tanned leather without risk of hexavalent chromium formation Type de document : texte imprimé Auteurs : Irene Compte, Auteur ; Quim Torras, Auteur ; Francina Izquierdo, Auteur ; Rosa M. Cuadros, Auteur ; Anna Bacardit, Auteur Année de publication : 2023 Article en page(s) : p. 439-449 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antioxydants
Auto-oxydation
Cuirs et peaux de moutons
Essais accélérés (technologie)
Lipides
Phénols
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Chromium tanned leather is the widest form of leather tanning across the world, but it might involve a risk of hexavalent chromium formation, which is restricted in leather products above 3 mg/ kg. Among other conditions, certain processes might lead to the oxidation of natural fats or fatliquoring agents with unsaturated carbon-carbon bonds, thus generating free radical molecules that can contribute to the Cr(III) oxidation to Cr(VI). The autooxidation of unsaturated lipids is promoted by exposure to high temperatures and light, specifically UV radiation. Among other relevant manufacturing practices, the addition of synthetic phenolic antioxidants (SPAs) during the synthesis of fatliquoring agents or during leather manufacturing can be a relevant tool for preventing lipid auto-oxidation.
The efficiency of the long-chain synthetic antioxidant 1135 (AO1135, CAS RN® 125643-61-0) has been assessed for Cr(VI) prevention. The performance of AO1135 has been tested in two different skin types (sheepskin, woolly sheepskin), with two different fatliquoring agents (unprotected and protected against oxidation). The protected fatliquoring agent was formulated with AO1135. Also, two commercial products that contain the AO1135 in its formulation have been applied to leathers. Upon completion of the post-tanning process, the leathers have undergone two different thermal ageing processes.
AO1135 has been verified an effective SPA for Cr(VI) prevention and its application during the post-tanning process does not alter the visual aspect of the leathers. Otherwise, if the post-tanning recipe does not contain well-sourced raw materials or Cr(VI) prevention tools, unsaturated fatliquoring agents or natural fats present in the skins can be a cause for Cr(VI) formation.Note de contenu : - INTRODUCTION : Origins of Cr(VI) in leather-hexavalent chromium containing substances - Influence of the pH value - Oxidation of fatliquoring agents - Natural extracts as a way for reducing formed Cr(VI) - Synthetic phenolic antioxidants as a tool for preventing lipid auto-oxidation - Forcing lipid auto-oxidation in leather - Determining the efficiency of antioxidant 1135 to prevent Cr(VI) formation - Commercial products with synthetic phenolic antioxidant
- EXPERIMENTAL : Design of the experiment - Samples - Chemicals and appartus - Methods - Determination of natural fat content in leather
- RESULTS : Cr(VI) content in the tanned leathers - Dispersion of the Cr(VI) content depending on the different parts of the leather
- DISCUSSION : Use of synthetic phenolic auxiliaries (AO1135) and its consequences on the Cr(VI) content - Zone of the leather and Cr(VI) distribution - Effect of different ageing treatments in Cr(VI)
- Table 1 : Structure of the study
- Table 2 : Conditions of sample exposure prior to Cr(VI) testing
- Table 3 : Cr(VI) content according to ISO 17075-2:2017 of sheep-skins produced
- Table 4 : Cr(VI) content according to ISO 17075-2:2017 of wooly sheep leathers produced
- Table 5 : Average and % RSD of leathers with Cr(VI) detectionDOI : https://doi.org/10.34314/jalca.v118i10.8232 En ligne : https://drive.google.com/file/d/1a3qDDoXd-GKDH-5gVHfu1cAh_Tje3ck8/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39942
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 10 (10/2023) . - p. 439-449[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24241 - Périodique Bibliothèque principale Documentaires Disponible Use of NaOH for unhairing hides and the influence of the addition of salts on the process and on the hide properties / Virgilijus Valeika in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 2 (03-04/1997)
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Titre : Use of NaOH for unhairing hides and the influence of the addition of salts on the process and on the hide properties Type de document : texte imprimé Auteurs : Virgilijus Valeika, Auteur ; J. Balciuniene, Auteur ; Kestutis Beleska ; A. Skrodenis ; V. Valeikienè Année de publication : 1997 Article en page(s) : p. 65-69 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The influence of the system containing NaOH, Na2S and a salt such as NaCl, Na2SO4, HCOONa or Na2HPO4 on the properties of hair in the process of unhairing was investigated. The influence of alkaline process conditions such as concentration of NaOH and salt, temperature and duration of the process on the degradation of collagen and non-collagen proteins, the swelling and the quality of unhairing was also studied.
It was established that addition of various salts influences the degree of opening up of the dermal structure. This is observed when the amounts of additional salts are not less than 4-5 % of NaCl, Na2SO4, HCOONa and 1-2 % of Na2HPO4. The unhairing efficiency decreased when these amounts of salts were used with the exception of NaCl. The temperature is of great importance. It must be no more than 30°C. The tendency towards swelling does not follow the tendency to destruction of the collagen. Under certain conditions of the alkaline treatment, the swelling decreases and degradation of collagen increases.
The addition of various salts during alkaline treatment widens the range of possibilities of using NaOH for unhairing hides.En ligne : https://drive.google.com/file/d/1BfVgJjT0zJ7Xeo0SuMWdQWAc6-xDDgzj/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8054
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 2 (03-04/1997) . - p. 65-69[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007015 - Périodique Bibliothèque principale Documentaires Disponible Use of natural fat emulsions in fatliquoring process and investigation of fatty spue formation / Gökhan Zengin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 3 (03/2011)
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Titre : Use of natural fat emulsions in fatliquoring process and investigation of fatty spue formation Type de document : texte imprimé Auteurs : Gökhan Zengin, Auteur ; Altan Afsar, Auteur Année de publication : 2011 Article en page(s) : p. 83-91 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras
Cuirs et peaux -- Dégraissage
Cuirs et peaux -- Finition
Emulsions
Fourier, Spectroscopie infrarouge à transformée de
Huiles et graisses
Iode
Microscopie électronique à balayage
Peroxydes
Produits de nourriture du cuir
Résonance magnétique nucléaireIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fatty spew is one of the most frequent defects appearing on finished leathers, especially sheepskins. Origins of this problem include an insufficient degreasing process, presence of excess residual natural fat in leather, quantity and quality of fatliquoring material added during the fatliquoring process and defective fatliquoring techniques. It is usually not easy to identify this problem during the processes. The aim of this study is to find out the limit value of natural fat that cause to fatty spew and its effect on leather quality. In the experiments Irish ovine sheepskins were used, as they are known for their high natural fat content. The experiments were carried out in three groups. The first group was processed without degreasing and fatliquoring. The second group was degreased and processed without fatliquoring and the third group was degreased; and fatliquored with 3, 5 and 7% of their own emulsified fat. The application of 3% fat emulsion is agreeable due to fatty spew formation in 5% and 7% fat emulsion application, as expected from preliminary tests. Some physical and chemical characteristics of natural and emulsified fats were investigated such as density, acid, peroxide and iodine values. Visual images of skin surfaces were obtained by Scanning Electron Microscopy (SEM). Gas Chromatography (GC), Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FT-IR). Analyses were performed for the determination of fatty acids components that cause fatty spew defect. It was determined that double bond between C and C in the structure of the palmitoleic and linoleic acids was saturated, the ratio of palmitic and stearic acids was increased and palmitic and stearic acids were found to be the main reasons for fatty spew formation. Note de contenu : METHOD AND RESULTS AND DISCUSSION : Determination of fat content - acid, iodine and peroxide values - Scanning electron microscopy (SEM) - Gas chromatography (GC) analysis - C nuclear magnetic resonance (RMN) - Fourier transform infrared spectroscopy (FTIR) analysis.
En ligne : https://drive.google.com/file/d/1S0CFlK1Qi1q2fgvStk1qcPHf4GB-6CyO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11237
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Code-barres Cote Support Localisation Section Disponibilité 012877 - 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
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Code-barres Cote Support Localisation Section Disponibilité 008304 - Périodique Bibliothèque principale Documentaires Disponible Use of seawater in leather processing / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 9 (09/2003)
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PermalinkUse of sodium silicate to improve the environmental aspects of traditional chrome tanning : development of a semi-industrial scaled process for high-quality bovine upper leather / A. d'aquino in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 1 (01/2004)
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PermalinkUse of solid leather wastes to producte value-added material / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 6 (11-12/2023)
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PermalinkUse of ternary solvent (water - ethanol - ethyl acetate) medium for leather processing : a possible paradigm change / Bhargavi Narayana Reddy Gari in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 7 (07/2016)
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PermalinkUse of ultrasound in soaking for improved efficiency / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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PermalinkUse of viscoelastic changes to demonstrate the relationship between drying parameters - A prelaminary study / William R. Wise in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
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PermalinkUse of waste collagen as a filler for rubber compounds / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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PermalinkUses and applications of microscopy in the leather industry - A practical approach to process control and leather manufacture / Rachel Garwood in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXX, N° 11 (11/1995)
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PermalinkUsing a mobile chiller for hides : a green method to resolve the TDS problem / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
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PermalinkUtilisation des extraits tinctoriaux en tannerie / J.-J. Rodier in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXIII (Année 1971)
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PermalinkL'utilisation des finissages acryliques réactifs pour les cuirs d'entretien facile / A.-G. Marriott in TECHNICUIR, N° 9 (11/1972)
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PermalinkPermalinkUtilisation des matériaux floqués thermoformables en maroquinerie / G. Pichon in TECHNICUIR, N° 3 (03/1975)
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PermalinkUtilisation of hide waste for the production of high-protein feed meals on the basis of a "collagen amino-acid index" / J. Zuchowski in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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