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A long way from chrome / Ross Davies in LEATHER INTERNATIONAL, Vol. 220, N° 4885 (10/2018)
[article]
Titre : A long way from chrome Type de document : texte imprimé Auteurs : Ross Davies, Intervieweur ; Florian Döppert, Personne interviewée Année de publication : 2018 Article en page(s) : p. 35-37 Langues : Anglais (eng) Catégories : Agents de tannage
Chrome -- Suppression ou remplacement
Glutaraldéhyde
Retannage
Tannage
Tannage -- Aspect de l'environnement
Tannage au zirconiumIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Speaking in June at the 7th Freibert Leather Days conference, the author used his presentation to examine the industsry's choices when it comes to retanning systems for chrome-tanned and chrome-free leather. As he tells Ross Davies, we need to think outside the box. Note de contenu : - Your presentation at the 7th Freiberg Leather Days conference was on the different impact of retanning systems for chrometanned and chrome-free leather. What made you choose to speak on this subject ?
- Why are high amounts of synthetic and natural tanning agents used in producing chrome-free leathers ?
- What are some of the potential improvements for chrome-free leather production – from an ecological and performance perspective ?
- What about the dyeing aspect in all of this ?
- You talked about zirconium as a tanning agent. What is its potential in regard to retanning ?
Résumé: Speaking in June at the 7th Freiberg Leather Days conference, Florian Döppert, the head of wet-end screening at TFL Ledertechnik, used his presentation to examine the industry's choices when it comes to retanning systems for chrome-tanned and chrome-free leather. As he tells Ross Davies, we need to think outside the box.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32681
in LEATHER INTERNATIONAL > Vol. 220, N° 4885 (10/2018) . - p. 35-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20320 - Périodique Bibliothèque principale Documentaires Disponible Low carbon products for the design of innovative leather processes. Part I : Determination of the optimal chemical modification of tara / Anna Bacardit in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 10 (10/2013)
[article]
Titre : Low carbon products for the design of innovative leather processes. Part I : Determination of the optimal chemical modification of tara Type de document : texte imprimé Auteurs : Anna Bacardit, Auteur ; Concepcio Casas, Auteur ; Franck Diaz, Auteur ; Rosa M. Cuadros, Auteur ; Lluis Ollé, Auteur Année de publication : 2013 Article en page(s) : p. 386-391 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Extraction (chimie)
Tanins végétaux
Tannage végétal
Tara et constituantsC'est un petit arbre épineux avec des gousses plates rouge qui pousse dans les zones sèches du Pérou, Amérique du Sud.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study considers the fruit of the tara bush as a sustainable source of tanning agents and proposes alternatives to the mineral salts and vegetable extracts for commercial use. Specifically, in part I of the study various processes of physical and chemical modification were developed in order to obtain a modified tara with a higher percentage of tannins which can therefore improve their tanning capability. Several aqueous extraction processes at different temperatures were developed and optimized in order to decrease the astringency and facilitate the penetration of the tannin molecules through the leather structure. Note de contenu : - MATERIALS AND METHODS : Analytical characterization of tara - Extraction processes of tara
- RESULTS AND DISCUSSION : Analytical characterization of tara - Extraction processes of tara - Optimization of the tannin extraction processEn ligne : https://drive.google.com/file/d/1ZnVooy5IZaQ8Klw6oJorfD8OQ7pa_FVc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19461
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 10 (10/2013) . - p. 386-391[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15578 - Périodique Bibliothèque principale Documentaires Disponible Melamine ethoxylates as novel formaldehyde free replacements of resin re-tanning agents / Jochen Ammenn in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 7 (07/2022)
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Titre : Melamine ethoxylates as novel formaldehyde free replacements of resin re-tanning agents Type de document : texte imprimé Auteurs : Jochen Ammenn, Auteur Année de publication : 2022 Article en page(s) : p. 296-301 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Cuirs et peaux de bovins
Ethoxylates de mélamine
Formaldéhyde -- Suppression ou remplacement
Produits de condensation (chimie)
Retannage
Tannage synthétique
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Melamine urea formaldehyde condensates or resin re-tanning agents are commonly used in the leather industry. They give rise to homogeneous filling, are easily and widely applicable, but generally contribute to free formaldehyde, measurable in emission or extraction methods. Many projects to resolve this issue have been carried out. The weakness of the resin re-tanning is the reversibility of the bond formation between formaldehyde and two amino groups. The formaldehyde forms a methylene group after condensation with two amino groups and releases water. This methylene group can be hydrolyzed under acidic conditions to release formaldehyde again, reversing the synthesis.
Melamine ethoxylates were found to be a formaldehyde free, stable, and easily applicable alternative. Besides the fact that they are made without formaldehyde, it proved to be possible to incorporate renewable components into their synthesis, giving rise to an even more sustainable product. Another sustainable aspect of this chemistry is the delivery of the potential product as a concentrated liquid versus most resin re-tanning agents being placed into the market as spray dried powders, consuming significant amounts of energy in the process.
Melamine ethoxylates show advantages in application on leather in comparison with classical resin re-tanning agents. An insight into the scope of application will be given, showing that melamine ethoxylates can be considered a formaldehyde free replacement for resin re-tanning agents.Note de contenu : - Melamine urea formaldehyde condensates
- Melamine ethoxylates
- Table 1 : Screening results of the re-tanning of bovine wet blue of different melamine ethoxylates against a standard melamine urea formaldehyde condensate and polyethylene glycol : + = better ; 0 = similar ; — = worse
- Table 2 : Re-tanning of bovine wet blue with the optimized melamine ethoxylate against a standard melamine urea formaldehyde condensate : + = better; 0 = similar ; - = worse
- Table 3 : Results of re-tanning of bovine wet blue or wet white with melamine ethoxylates in a mixed recipe compared to a melamine urea formaldehyde condensate in the mixed recipe : + = better; 0 = similar; - = worseEn ligne : https://drive.google.com/file/d/1cuWtS0wR-6zJregVnQ4eK0FqHZOfhLNC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37822
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 7 (07/2022) . - p. 296-301[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23515 - Périodique Bibliothèque principale Documentaires Disponible Minimization of industrial wastes-adding value to collagenic : Adding value to collagenic materials procter memorial lecture / J. Cot in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 3 (05-06/2003)
[article]
Titre : Minimization of industrial wastes-adding value to collagenic : Adding value to collagenic materials procter memorial lecture Type de document : texte imprimé Auteurs : J. Cot, Auteur ; Agusti Marsal, Auteur ; Albert M. Manich, Auteur ; Pedro J. Celma, Auteur ; Rigoberto Choque, Auteur ; Luisa F. Cabeza, Auteur ; L. Labastida, Auteur ; J. Lopez, Auteur ; J. Salmeron, Auteur Année de publication : 2003 Article en page(s) : p. 91-97 Langues : Anglais (eng) Catégories : Agents de tannage
Chrome trivalent
Colorants
Cuirs et peaux -- Déchets
Déchets -- Réduction
Huiles et graisses
Polyacryliques
Polyuréthanes
Statistiques
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Our research is in the area of minimisation of industrial waste in the leather industry. This contribution is concerned with the processing of chromed collagen residues produced at each of the different stages of production. These are :
- group I : chromed residuals - tanning and drying stage - crust state
- group II : chromed residuals + fatty matter - fatliquoring stage
- group III : chromed residuals + fatty matter + retanning agents - retanning stage
- group IV : chromed residuals + fatty matter + retanning agents + dyestuff - dyeing stage
- group V : chromed residuals + fatty matter + retanning agents + dyestuff + acrylic and /or polyurethanes - finish stage
Group V residues represent the highest percentage of the total volume of residues and they are also the most complex. The group includes the trimmings from industrial manufacturers of leather products such as footwear, clothing and upholstery.
Chromed collagen residues are those stabilised or crosslinked with chromium (III) salts which block any later treatment to obtain gelatine using conventional methods. A large part of this type of residue is used for the production of agglomerates known as regenerated leather, mixing with latex in dutch-piles, from which various articles are manufactured.Note de contenu : - STASTISTICAL TREATMENT OF THE RESULTS : Experimental design - EVOP design - The relationship between NaOH concentration, temperature and Bloom degree - Inclusion of the effect of temperature and of time on the Bloom degree
- INDUSTRIAL APPLICATION
- Table A : Variable levels of the box and hunter design
- Table B : Experimental plan randomly ordered
- Table C : First EVOP cycle design to explore the optimum Bloom zone : H2O2 remained constant at 1 mL
- Table D : Second EVOP cycle design to explore the optimum Bloom zone : H2O2 remained constant at 1 mL
- Table E : Experiments used to explore the functional relationship between the NaOH concentration and Bloom degreeEn ligne : https://drive.google.com/file/d/1ZN4xdrByWrdVJUfF_R7kUw77M4hKfcNs/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39781
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 3 (05-06/2003) . - p. 91-97[article]Modification of starch and its application in leather making / Jumeng Zhen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
[article]
Titre : Modification of starch and its application in leather making Type de document : texte imprimé Auteurs : Jumeng Zhen, Auteur ; Ma Jianzhong, Auteur Année de publication : 2002 Article en page(s) : p. 93-95 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Amidons
Cuirs et peaux
Greffage (chimie)
Matériaux -- Modifications chimiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the general methods of starch modification are discussed. The applications of modified starch in leather making are summarized and the potential applications of the modified starch are considered.
Though the studies of the modified starch were focussed on dialdehyde starch that has been used as tanning material in the past, the authors believe that graft starch maybe a possible new material in leather making with uses as tanning agent, retanning agent, and finishing agent.Note de contenu : - The structure of starch
- Modification of starch
- Application of Modified starch in leather makingEn ligne : https://drive.google.com/file/d/15SwQjBHRIbWIlA12GmzAsLfIwtzRhJqm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39921
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 93-95[article]A new pretanning agent for high exhaustion chrome tannage / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 3 (05-06/2005)
PermalinkA novel eco-combination tannage of chrome-free leather with softness and high shrinkage temperature / Luo Jian-Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 3 (05-06/2022)
PermalinkA novel pre-tanning agent for high exhaustion chromium tannage / Luan Shifang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)
PermalinkA novel synthesized melamine compound for leather making / Wang Yu-Zeng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 1 (01-02/2017)
PermalinkOxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 5 (09-10/1977)
PermalinkOxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkParticle size evolution of melamin-formaldehyde tanning agent on tanning effect / Mengmeng Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 5 (05/2018)
PermalinkPhysico-chemical study on micelle formation of chromium-aluminium synthetic tanning materials in various environments and at various temperatures and its application to leather / A. B. Mandal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)
PermalinkPhysico-chemical study on micelle formation of chromium-aluminium synthetic tanning materials in various environments and at various temperatures and its application to leather / A. B. Mandal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 66 (Année 1982)
PermalinkPhytochemical screening and determination of tannin content of compounds from acacia xanthophloea as viable tanning agents for the leather industry / Michael Cheloti in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 5 (09-10/2022)
PermalinkPine tannin extraction from residues of pine forest exploitation / Mireia Conde in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)
PermalinkPolyacrylate ester-based polycarboxylate (PCE) as a new leather retanning agent / Miquel Canudas in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)
PermalinkPolyanionic bio-emulsifier : a heteropolysaccharide based bio-composite for leather post tanning process / Sharmila Selvaraju in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)
PermalinkA polyurethane-based retanning agent with fluorescent effect / Saiqi Tian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 4 (04/2016)
PermalinkA practical evaluation of acrylic resins and the development of a materials evaluation method / M. Bientinesi in WORLD LEATHER, Vol. 18, N° 4 (06-07/2005)
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