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Effect of chromium and tanning method on the drape of goat suede apparel leathers / K. Krishnaraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 3 (03/2010)
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Titre : Effect of chromium and tanning method on the drape of goat suede apparel leathers Type de document : texte imprimé Auteurs : K. Krishnaraj, Auteur ; B. Chandrasekaran, Auteur ; Palanisamy Thanikaivelan, Auteur Année de publication : 2010 Article en page(s) : p. 71-77 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux de chèvres
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tanning stabilizes the skin matrix permanently and is considered as the heart of leather processing. In commercial practice, vegetable and chrome tanning methods are widely employed. Between these two methods, chrome tanning is the most commonly used tanning method. Hence, it is logical to study the relationship between the chromium content and drape related properties of garment leathers. In this study, the bending length and drape parameters were measured for goat suede leathers with different chromium contents and analyzed. The goat suede leathers were prepared in three different ways namely full chrome (FC), semi chrome (SC) and full vegetable (FV) methods. Whereas FC and FV goat suede leathers had increasing drape coefficient values, the drape coefficient for SC goat suede leathers was the lowest in the range of 35.1±7.2 %. Further, softness, bending length and number of nodes for SC goat suede leathers were statistically superior in the stand point of drape ability compared to FC and FV goat suede leathers. Hence, it is validated that the semi chrome goat suede leathers possess better drape ability compared to full chrome as well as full vegetable goat suede leathers. Consequently, the presence of chromium in the leathers plays a major role in the draping ability of goat suede apparel leathers ; however, it is also infered that more amount of chromium in the leathers (FC) did not yield better drape ability. En ligne : https://drive.google.com/file/d/1JgOhogXe-emjSdEt5tW24YniW_hopZPc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8732
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Code-barres Cote Support Localisation Section Disponibilité 012029 - Périodique Bibliothèque principale Documentaires Disponible Effect of pickling materials on leather quality from a hide surface charge perspective / Tianqi Yang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 7 (07/2022)
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Titre : Effect of pickling materials on leather quality from a hide surface charge perspective Type de document : texte imprimé Auteurs : Tianqi Yang, Auteur ; Yunhang Zeng, Auteur ; Qingyong Sun, Auteur ; Chao Lei, Auteur ; Bi Shi, Auteur Année de publication : 2022 Article en page(s) : p. 279-287 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composés aromatiques
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Propriétés physiques
Pénétration cutanée
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Sulfoniques, Acides
Tannage au chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Salt-free pickling technology has recently received increased attention because it produces much lower salt pollution than the conventional pickling technology using formic acid, sulfuric acid, and sodium chloride. However, the existing salt-free pickling materials, for instance, aromatic sulfonic acids (ASAs), lead to reduced leather quality and the reason behind this phenomenon is unclear. In this study, we explored how ASAs affect the properties of tanned leather. Results showed that typical ASAs, such as 5-sulfosalicylic acid, 1,5-naphthalenedisulfonic acid, and 2-naphthalenesulfonic acid, penetrated cattle hide more slowly compared with formic and sulfuric acids because of their large molecular weight and strong intermolecular interactions with hide collagen. ASAs decreased the positive charge of the pickled hide via interactions with their sulfonic acid groups, resulting in the increased adsorption rate of chrome tanning agent to the hide surface. Rapid tanning agent adsorption could impede the deep penetration and uniform distribution of the agent in the ASA-pickled hide. Thus, the properties of wet blues and crust leathers pickled with ASAs are inferior to those of wet blue and crust leather pickled using conventional pickling materials. Our results indicate that a strongly positive charge of the pickled hide is vital to obtaining high-quality leather and provide insights into salt-free pickling materials from a hide surface charge perspective. Note de contenu : - EXPERIMENTAL : Materials - Pickling experiments - Analyses of pickling performance - Analyses of chrome tanning performance - Determination of the physical properties of crust leather
- RESULTS AND DISCUSSION : Penetration of various acids into hide - Surface charge properties of hides pickled with various acids - Hydrothermal stability and fiber dispersion of hides pickled with various acids - Effect of pickling materials on chrome tanning performance - Effect of pickling materials on the physical properties of crust leathers
- Table 1 : Pickling and chrome tanning processes
- Table 2 : Pseudo-first-order and pseudo-second-order kinetic parameters for chrome adsorption
- Table 3 : Physical properties of crust leathersDOI : https://doi.org/10.34314/jalca.v117i7.5962 En ligne : https://drive.google.com/file/d/1UhajIthtPvDv2bquUbfxlI9pj2WugNC8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37820
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 7 (07/2022) . - p. 279-287[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23515 - Périodique Bibliothèque principale Documentaires Disponible Effect of ultrasound on several chromium tanning parameters / Josep Maria Morera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 5 (05/2010)
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Titre : Effect of ultrasound on several chromium tanning parameters Type de document : texte imprimé Auteurs : Josep Maria Morera, Auteur ; Esther Bartoli, Auteur ; M. Serrano, Auteur ; F. Ccombalia, Auteur ; E. Borrà s, Auteur ; Lluis Ollé, Auteur ; Anna Bacardit, Auteur Année de publication : 2010 Article en page(s) : p. 150-159 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Tannage au chrome
UltrasonsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chrome tanning with ultrasound - This work studies the effect of several variables on a series of properties of the final leather obtained from chrome tanning, using ultrasounds as the sole mechanical effect during the tanning operation. The variables studied (at two levels by means of a 2 3 factorial design) are tanning temperature, condition of chrome offered (solid or dissolved) and salt basicity. Our studies indicate that the results obtained measuring parameters such as struck-through time of tanning agent, chromium uptake and its distribution, shrinkage temperature, tensile strength, tear load, grain distension and leather burst distention significantly depend on the previously selected level of one or more of the variables being studied. The study of the evolution of the concentration and basicity of the chromium salts has led us to conclude that reutilization is possible. Results show that ultrasound use in chrome tanning is a possibility to consider in the case of leather goods in which the use of drum may not be avisable. En ligne : https://drive.google.com/file/d/1VGwjmGwSc975iHa4k7Ssbw6iRGFjJTj9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9364
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 5 (05/2010) . - p. 150-159[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012157 - Périodique Bibliothèque principale Documentaires Disponible Effects of level and length of supplementation on leather characteristics of yearling boer and spanish wethers / R. C. Merkel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 4 (04/2013)
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Titre : Effects of level and length of supplementation on leather characteristics of yearling boer and spanish wethers Type de document : texte imprimé Auteurs : R. C. Merkel, Auteur ; Cheng-Kung Liu, Auteur ; Nicholas P. Latona, Auteur ; A. El Amma, Auteur ; A. L. Goetsch, Auteur Année de publication : 2013 Article en page(s) : p. 139-145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Allongement (mécanique)
Allongement à la rupture
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Epaisseur -- Mesure
Essais dynamiques
Glutaraldéhyde
Tannage au chrome
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Thirty Boer × Spanish and 29 Spanish wethers were used in a trial to determine the effects of goat breed, supplementation level, and age on the mechanical properties of chrome-tanned and glutaraldehyde-tanned goat skin. Six Boer and five Spanish wethers were harvested at the beginning of the trial with the remaining animals assigned to four groups, having equal breed numbers, receiving either a high or low supplement amount daily. Two groups were harvested after 110 days and the remaining groups after an additional 108 days. Skins were removed by hand, split down the dorsal midline, and salted. The left half of each skin was chrome-tanned and the right half was tanned using a glutaraldehyde based tannage. Tanning goat skins using chromium resulted in stronger leather than that produced using glutaraldehyde. Increasing age led to decreased % elongation and increased leather stiffness. The effects of supplementation level were of lesser importance than tannage or age upon the strength characteristics of leather produced. Boer goat leather was thicker than Spanish goat leather, although tensile strength was unaffected by breed. Goat skins were not shaved to an equal thickness during the tanning process, perhaps leading to some of the breed differences seen, notably in % elongation and fracture energy. Therefore, further research is needed to evaluate characteristics of shaved skins. Note de contenu : - MATERIALS AND METHODS : Animals and treatments - Harvest and tannage measures - Leather testing - Statistical analyses
- RESULTS : Feedstuffs - Live and fresh skin weight - Leather thickness - % elongation - Fracture energy - Tensile strength - Young's modulusEn ligne : https://drive.google.com/file/d/1iIJDgwQvY0tbO_HB0Lisk7bM6NYH_IM7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18089
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Code-barres Cote Support Localisation Section Disponibilité 14980 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical separation of chromium containing tannery waste liquid / Zheng Haonan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 3 (05-06/2020)
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Titre : Electrochemical separation of chromium containing tannery waste liquid Type de document : texte imprimé Auteurs : Zheng Haonan, Auteur ; Cao Shengkui, Auteur ; Yang Wenhua, Auteur ; Zhihua Shan, Auteur Année de publication : 2020 Article en page(s) : p. 145-150 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Décontamination
Eaux usées -- Teneur en chrome hexavalent
Eaux usées -- Teneur en chrome trivalent
Electrochimie
Electrolyse
Énergie -- Consommation
Membranes échangeuses d'ions
Séparation (technologie)
Tannage -- Déchets
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Comparing the electrolysis results of a chromium sulphate standard solution with cation and anion membranes, it was found that electrolysis with the cation membrane could remove more chromium. After electrolysis with the cation membrane of the mixed waste liquid containing chromium from chrome tanning, washing, chrome retanning and neutralisation, Cr(OH)3 could be precipitated, the Cr3+ solution showed a reduced concentration at the cathode, and a Cr6+ solution could be obtained at the anode. The results of this study show that cyclic electrolysis of such liquid waste containing chromium at the cathode can increase Cr(OH)3 precipitation and reduce the Cr6+ concentration at the anode. Note de contenu : - PRINCIPLE OF CHROMIUM REMOVAL BY AN ELECTROCHEMICAL METHOD
- EXPERIMENTAL METHOD : Main reagents - Main instruments and equipment - Determination of the chromium content - Preparation of the waste liquid containing chromium - Electrolysis experiment
- EXPERIMENTAL RESULTS AND DISCUSSION : Electrolysis of the chromium sulphate standard solution with an anion membrane - Double cell electrolysis of chromium sulphate standard solution with a cation membrane - Double cell electrolysis of waste liquid containing chromium with a cation membrane - Results of the cyclic electrolysis of waste liquid containing chromium in the cathode - Electrical energy consumption of one cycle of electrolysisEn ligne : https://drive.google.com/file/d/1j6UDp1T1ywy_Th55yvNEtuT1g3TvrLsI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34244
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 3 (05-06/2020) . - p. 145-150[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21767 - Périodique Bibliothèque principale Documentaires Disponible Electron microscope studies of leather-polymer systems / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
PermalinkEtude d'un nouveau procédé de tannage par les sels de chrome en milieu solvant organique immiscible à l'eau. Son extension à l'échelle pilote industriel, à divers types de fabrication et différents agents tannants / Véronique Chagne / 1994
PermalinkEtude sur l'application des produits de chrome prêts à l'emploi / H. Spahrkäs / Leverkusen [Allemagne] : Bayer (nd)
PermalinkEtude sur le tannage au chrome à deux bains / K. Klanfer in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXI (Année 1969)
PermalinkEtudes chimico-physiques sur les caractéristiques des solutions de sulfates basiques de chrome / Florin Platon C. in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXIV (Année 1972)
PermalinkEvolution récente du procédé de tannage au chrome / P. J. van Vlimmeren in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXI (Année 1969)
PermalinkExpérience pratique dans la mise en oeuvre d'un tannage d'imperméabilisation / Stanley Briggs in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXIV (Année 1972)
PermalinkExploration of the diffusion, binding and crosslinking of chromium complex within hides during chrome tanning / Chunxiao Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 5 (05/2019)
PermalinkPermalinkFish skin and exotic leathers / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 2 (02/2017)
PermalinkA further investigation on collagen-Cr(III) interaction at molecular level / Weimo Han in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)
PermalinkA game of two halves in LEATHER INTERNATIONAL, Vol. 220, N° 4882 (07/2018)
PermalinkGel-sol transitions of chrome tanned leather waste hydrolysate / F. Langmaier in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 3 (05-06/2001)
PermalinkGlutaraldehyde retannage of chrome leather. Effect of ambient storage on selected properties of the leather / E. H. Harris in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
PermalinkGraft polymerization. IV. Further studies of the initiation step in the graft polymerization of vinyl monomers onto chrome-tanned collagen / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)
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