Effect of chrome content in the chrome tanning liquid of the leather tanning machine on the properties of leather / Wang Xue-Chuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 1 (01-02/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 1 (01-02/2015) . - p. 33-38 Titre : Effect of chrome content in the chrome tanning liquid of the leather tanning machine on the properties of leather Type de document : texte imprimé Auteurs : Wang Xue-Chuan, Auteur ; Zhang Feifei, Auteur ; Qiang Tao-Tao, Auteur ; Xi Ying, Auteur Année de publication : 2015 Article en page(s) : p. 33-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de tannage -- Teneur en chrome Caractérisation Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Mesure Tannage -- Appareils et matériels Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The effect of chrome content in chrome tanning liquid on the physical and mechanical properties of leather when using the specially designed leather tanning machine were studied and the leather was characterized by EDS and SEM. The results showed that, considering the chrome content in leather and the physical and mechanical properties of leather, the best chrome content in the chrome tanning liquid was 16g/L. The EDS results showed that the distribution of chrome in leather was relatively uniform. The SEM results showed that the collagen fibre dispersion of leather tanned with the leather tanning machine was better than the leather tanned by drum. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Equipment - Experiment operation - Testing characterization - RESULTS AND DISCUSSION : The effect of chrome content in chrome tanning liquid on the shrinkage temperature of leather - The effect of chrome content in chrome tanning liquid on physical and mechanical properties of leather - EDS analysis - SEM analysis En ligne : https://drive.google.com/file/d/1UTIWJ4VvzIQFcgthQU-xPoAjPPglqI3m/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23232 [article]

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Hyperbranched polymers - A primer for their uses in the leather industry / Wang Xue-Chuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 2 (03-04/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 2 (03-04/2006) . - p. 54-57 Titre : Hyperbranched polymers - A primer for their uses in the leather industry Type de document : texte imprimé Auteurs : Wang Xue-Chuan, Auteur ; Qiang Tao-Tao, Auteur ; Ren Long-Fang, Auteur Année de publication : 2006 Article en page(s) : p. 54-57 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Cuirs et peaux -- Finition Floculant Polymères ramifiés Système de libération contrôlée (technologie) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The evolution, structural traits and characteristics of hyperbranched polymers are summarized. Furthermore, the article analyzes the feasibility of their applicability as a new type of tanning agent in leather industry with the possibility of chrome-free leather. The article is intended as a guide and introduction to hyperbranched polymers and their possible applications in the leather industry. Note de contenu : - BACKGROUND : Special features of hyperbranched polymers - APPLICATION FOREGROUND OF HYPEBRANCHED POLYMERS IN THE LEATHER INDUSTRY : Use as tanning and retanning agents - Used to prevent Cr (VI) formation in leather - Use as highly absorptive chrome tanning auxiliaries - Use as finishing agents and auxiliaries - Use as sustained-release agents - Use as levelling and fixing agents - Used as flocculating agents in tanning waste disposal En ligne : https://drive.google.com/file/d/1BpyCZdK6s05GMwWA7gPGuzSPe4ZyP-92/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39157 [article]

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Phosphonium-aluminum combination tanning for goat garment leather / Ren Long-Fang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 6 (06/2009)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 6 (06/2009) . - p. 232-241 Titre : Phosphonium-aluminum combination tanning for goat garment leather Type de document : texte imprimé Auteurs : Ren Long-Fang, Auteur ; Wang Xue-Chuan, Auteur ; Qiang Tao-Tao, Auteur ; Ren Yong-Qiang, Auteur ; Xu Jianxin, Auteur Année de publication : 2009 Article en page(s) : p. 232-241 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A new tetrakis hydroxymethyl phosphonium sulphate (THPS)-aluminum combination tanning system has been developed. The optimum dosage of THPS was 2.0%. The amount of THPS and basic aluminum chloride was optimized at 2.0% and 3.0% (basing on the weight of pelt). The influence of ligands on the shrinkage temperature (Ts) of leathers was also studied and the Ts of THPS-aluminum combination tanned leathers was above 88°C. Color fastness to dry/wet rub of THPS-aluminum combination tanned leathers was much better than the relevant color fastness to dry/wet rub of leathers tanned with THPS alone. Scanning electron microscopic studies showed that the fiber weave of THPS-aluminum combination tanned leather was much closer than leathers tanned with THPS alone and the fiber weave of THPS-aluminum combination tanned leather was closer(tighter) with an increase of amount of basic aluminum chloride. Hence, with the increase of the amount of basic aluminum chloride, the reactive ability of basic aluminum chloride with collagen fiber was stronger and the softness became worse. Degradation rate of soiling for the THPS-aluminum combination tanning leather was much quicker than that of chrome tanning leather. Through SEM analysis, the surface structure of leather which was not degraded was more regular than the leather degraded for 30 days. Meantime, the of THPS-aluminum combination tanning leather degradated much more easily than the chrome leather, which suggested a benefit for the sustainable development of the leather industry in future. En ligne : https://drive.google.com/file/d/1rceSxbfqOplHnQS3Mb4wFMBANyf5JUUs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5988 [article]

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Phosphonium-zirconium combination tannage for goat garment leather / Qiang Tao-Tao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 5 (09-10/2008)

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 5 (09-10/2008) . - p. 192-199 Titre : Phosphonium-zirconium combination tannage for goat garment leather Type de document : texte imprimé Auteurs : Qiang Tao-Tao, Auteur ; Wang Xue-Chuan, Auteur ; Ren Long-Fang, Auteur ; Xu Jian-Xin, Auteur Année de publication : 2008 Article en page(s) : p. 192-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés chimiques Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de chèvres Essais (technologie) pH Sulfate de tétrakis hydroxyméthyl phosphonium Le sulfate de tétrakis hydroxyméthyl phosphonium est un myxobactéricide qui offre une prévention efficace contre les biofilms microbiens dans les eaux de traitement, et ce, pour une vaste gamme de micro-organismes formant des biofilms. Le sulfate de tétrakis (hydroxyméthyl) phosphonium agit principalement en augmentant la perméabilité de la membrane externe de l'enveloppe de la cellule microbienne, ce qui entraîne la libération rapide de protéines et d'autres substances cellulaires par les cellules. En outre, le sulfate de tétrakis (hydroxyméthyl) phosphonium inhibe le processus de sulfatoréduction dans les bactéries réductrices de sulfate. Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Zirconium Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A new tetrakis hydroxymethyl phosphonium sulphate (THPS)-zirconium combination tanning system has been developed. The optimum dosage of THPS, pickling pH and basifying pH were 2.0%, 3.5 and 5.0, respectively. The amount of THPS and zirconium sulphate were optimized at 2.0% and 2.5% (based on the pelt weight). The influence of ligands on the shrinkage temperature (Ts) of leathers has also been studied and the Ts of THPS alone and THPS-zirconium combination tanned leathers was much better than the relevant colour fastness to dry/wet rub of THPS alone tanned leathers. Scanning electron microscopic studies show that the fibre weave of THPS-zirconium combination tanned leather was much closer than for THPS only tanned leather and the fibre weave of THPS-zirconium combination tanned leather was closer with an increase of amount of zirconium sulphate. Hence, this proves that the softness was reduced with an increase of the amount of zirconium sulphate and that the reactivity of zirconium sulphate with collagen fibre was very strong. The bulk trial carried out in Haining Shangyuan Leather Co., Ltd., proved that all indexes of the leather reached Chinese standard requirements. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Determination of Ts - Optimization of the dosage of THPS - Optimizing pH - THPS-zirconium combination tanning - Physical testing and handle of leather - Test of Cr2O3, Cr6+ and formaldehyde content - Analysis with scanning electron microscopic (SEM) - RESULTS AND DISCUSSION : Optimization of the dosage of THPS - Optimization of pH - Optimization of the dosage of zirconium retanning agent - Fig. 1 : Relation of Ts and the dosage of THPS - Fig. 2 : Relation of tensile strength and the dosage of THPS - Fig. 3 : Relation of tear strength and the dosage of THPS - Fig. 4 : Organoleptic properties of THPS alone tanned leathers - Fig. 5 : Relation of TS and the dosage of zirconium sulphate - Fig. 6 : Organoleptic properties of leathers tanned with THPS-zirconium - Table 1 : Process to pickle and tan for wet salted goatskins - Table 2 : Process topickle and tan and post tanning for garment leather - Table 3 : Zirconium retanning process for garment leather - Table 4 : Relation of pickling pH and penetration of THPS - Table 5 : Relation of basifying pH and Ts - Table 6 : Dyeing ability of THPS-zirconium combination tanned leather - Table 7 : Physical-chemical properties of leathers Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35250 [article]

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Study on the microstructure of crocodylus niloticus skins during leather making process / Qiang Tao-Tao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 3 (03/2019) . - p. 89-93 Titre : Study on the microstructure of crocodylus niloticus skins during leather making process Type de document : texte imprimé Auteurs : Qiang Tao-Tao, Auteur ; Han Mi-Mi, Auteur Année de publication : 2019 Article en page(s) : p. 89-93 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Crocodile du Nil Cuirs et peaux -- Analyse Microstructures -- Analyse Peau -- Histologie Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The variation on the microstructure of Crocodylus niloticus skins in the tanning process was observed and analyzed by using frozen section staining, which provide the reliable theoretical basis for Crocodylus niloticus leather production. The research on aldehyde fuchshin staining method showed that elastic fiber will receive a lot of damage in the bating and bleaching process. Through the observation of wet blue leather by scanning electron microscopy, the preparation work section and tanning process design are reasonable, also, inter-fibrillary substances had been well removed. The crosscut microstructure of Crocodylus niloticus hides before and after fatliquoring was observed by nile blue sulphate staining method, and the results showed that fatliquor could penetrate into the skin uniformly. Note de contenu : - EXPERIMENTAL : Materials - Instruments - Leather making process - Sampling - Observation on microstructure of preparation and tanning section - Optical light microscope observation - Scanning electron microscope observation - RESULTS AND DISCUSSION : The variation of histology at preparation stage - the variation of elastic fibers at preparation stage - The histology of blue wet skins of crocodylus niloticus - The variation of histology before and after fatliquoring En ligne : https://drive.google.com/file/d/1FihZhQIpgWbw6oZQ511GYr85HhhhegdC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31929 [article]

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Zirconium-oxazolidine combination tannage for sheep garment leather / Qiang Tao-Tao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 2 (03-04/2009)  

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