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Studies on combination tanning based on henna and oxazolidine / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 10 (10/2009)
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Titre : Studies on combination tanning based on henna and oxazolidine Type de document : texte imprimé Auteurs : A. E. Musa, Auteur ; Balaraman Madhan, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; B. Chandrasekaran, Auteur ; G. A. Gasmelseed, Auteur Année de publication : 2009 Article en page(s) : p. 335-343 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Among the innumerable alternative tannages that are currently exploited, the vegetable tannins and oxazolidine combination is one of the most promising options. In this study, an organic combination tanning process based on henna and oxazolidine for the production of upper leather is presented. Extract from the leaves of Lawsonia inermis (henna) obtained from Sudan has been utilized for tanning in combination with oxazolidine. It has been observed that this combination tanning, which employs 20% henna extract and 4% oxazolidine results in leathers with shrinkage temperature of 98oC. The differential scanning calorimetry data is in accordance with the observed shrinkage temperature. The change in the order of addition of henna and oxazolidine though showed marginal difference in thermal stability, but significant variations were observed in physical characteristics of leathers. Scanning electron microscopic analysis showed that leathers tanned first with oxazolidine resulted in better fibre splitting. Leather made from oxazolidine followed by henna resulted in relatively softer leathers compared to henna followed by oxazolidine tanning. Leather made from both the tanning combination systems meets the required strength characteristics for upper leathers. The manufacture of upper leathers using combination of henna and oxazolidine appears to be promising. En ligne : https://drive.google.com/file/d/1La-kCqjf6RzfG3UbEoSgcY1Sa9MvCGhn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6370
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 10 (10/2009) . - p. 335-343[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011705 - Périodique Bibliothèque principale Documentaires Disponible Studies on selective defect identification of crust leathers for computer-aided grading / S. Nithiyanantha Vasagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 6 (06/2013)
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Titre : Studies on selective defect identification of crust leathers for computer-aided grading Type de document : texte imprimé Auteurs : S. Nithiyanantha Vasagam, Auteur ; Balaraman Madhan, Auteur ; B. Chandrasekaran, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2013 Article en page(s) : p. 210-220 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Défauts
Cuirs et peaux -- Défauts -- Classification
Cuirs et peaux -- Défauts -- NotationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Grading of leathers is a sensitive and vital process in leather trade. Conventional grading methodology deals with visual inspection of the leathers. This practice is purely based on experience of the person (sortor) grading leathers and has no defined frame work. The current grading process is highly subjective, varying from one person to another. In order to overcome these problems and to have better objectivity in the grading process, it is proposed to design a Computer Aided Grading (CAG) system for leather grading. The principle of image recognition and detection of pixels of the scanned image of leathers will be used for the CAG system. Note de contenu : - MATERIALS AND METHODS : Identification of various defects (crust leather) - Parameters considered for grading based on defects - Objective methodology - Software system - Crust leather - Image scanning - Loading the image - Cutting range finding - Identification of color values, row ID, column ID and position - Data storage - Analysis of color - Grading
- RESULTS AND DISCUSSION : Defects count - Defect identification and grade valueEn ligne : https://drive.google.com/file/d/1NhgEqzcor0lEusnUmHjPJQFoJ8HsKtf1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18744
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Code-barres Cote Support Localisation Section Disponibilité 15158 - Périodique Bibliothèque principale Documentaires Disponible Studies on tanning with zirconium oxychloride : Part I. Standardization of tanning process / A. Sundarrajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
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Titre : Studies on tanning with zirconium oxychloride : Part I. Standardization of tanning process Type de document : texte imprimé Auteurs : A. Sundarrajan, Auteur ; Balaraman Madhan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2003 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Concern over environmental toxicology and demand for safe disposal of process wastes are topics of current interest. Although chromium(III) salts find extensive usage in leather processing, the environmental concerns of the leather industry for chromium pollution has led to search for alternative tanning agents. Zirconium salts seem to have the potential for their long-term sustenance in tanning processes. There are several reports on the use of sulphate salts of zirconium in tanning, but the associated disadvantages are poor solubility, drawn grain etc., which have limited their use as a tanning salt. Hence, exploration of other zirconium salts, like zirconium oxychloride as tanning agent is essential. The present investigation focuses on the development of a tanning system using zirconium oxychloride by proper ligation. Zirconium oxychloride with different ligating environments have been employed for tanning experiments. Hydrothermal stability of leathers as high as 95°C has been obtained. Citric acid has been found to be a better ligand, which produces leathers with high hydrothermal stability as compared to other ligands. The precipitation point of zirconium oxychloride solutions with and without citric acid masking has been determined. The amount of tanning salt and ligand used have also been standardized to obtain leathers with properties comparable to those of conventional chrome-tanned leather. En ligne : https://drive.google.com/file/d/1ULqGhdng4hGmlruZEYEhk8bF0366caBC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4098
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 3 (03/2003) . - p. 101-106[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001584 - Périodique Bibliothèque principale Documentaires Disponible 001585 - Périodique Bibliothèque principale Documentaires Disponible Studies on tanning with zirconium oxychloride : Part II. Development of a versatile tanning system / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
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Titre : Studies on tanning with zirconium oxychloride : Part II. Development of a versatile tanning system Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; A. Sundarrajan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2003 Article en page(s) : p. 107-114 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Zirconium oxychloride, with suitable ligand environment has been found to be an effective tanning agent. Hydrothermal stability of about 95°C was obtained for the leathers treated with zirconium oxychloride masked with citric acid. The present investigation focuses on possible methodologies to improve the properties of leathers obtained from zirconium oxychloride tanning to suit different product mix through treatment with various co-tanning adjuncts. Exhaustion of zirconium was found to be greater than 80% in all tanning experiments. The zirconium oxychloride leathers posttanned without neutralization exhibit better organoleptic properties compared to leathers posttanned after neutralization. The post-tanning operations have been optimised to obtain both upper and garment leathers. Treatment of zirconium oxychloride leathers with silica produced fuller and smooth grained upper leathers whereas, pretreatment with gluteraldehyde resulted in soft garment leathers. Properties of the leathers obtained are on par with the conventional chrome tanned leathers. Thus a tanning system based on zirconium oxychloride has the potential to be as versatile as chrome tanning systems, which produce leathers for different end uses. En ligne : https://drive.google.com/file/d/1zSSoGgY78awWdhZoLLlDB1xGysSHiXTP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4099
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 3 (03/2003) . - p. 107-114[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001584 - Périodique Bibliothèque principale Documentaires Disponible 001585 - Périodique Bibliothèque principale Documentaires Disponible Studies on tara-phosphonium combination tannage : approach towards a metal free eco-benign tanning system / Rathinam Aravindhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 3 (03/2015)
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Titre : Studies on tara-phosphonium combination tannage : approach towards a metal free eco-benign tanning system Type de document : texte imprimé Auteurs : Rathinam Aravindhan, Auteur ; Balaraman Madhan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2015 Article en page(s) : p. 80-87 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Environnement -- Etudes d'impact
Sulfate de tétrakis hydroxyméthyl phosphoniumLe 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 combinéLe 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 œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
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 : 675.2 Préparation du cuir naturel. Tannage Résumé : One of the important criteria determining the sustainability of an industrial activity is the ecological acceptability of the processing methods. Tanners throughout the world are looking for alternative eco friendly tanning systems. In the present work, metal free tanning system using a combination of Tetrakis Hydroxymethyl Phosphonium Sulphate (THPS) and Tara has been developed. This combination tanning is expected to be an effective eco-friendly mineral free tanning. The shrinkage temperature of the leathers obtained is 88°C. The tanning system is versatile in terms of processing both upper and garment leathers. The physical strength characteristics and organoleptic properties of the leathers obtained are comparable to that of chrome tanned leather. Environmental impact assessment shows that there is reduction in total solids when compared to control chrome tanning. Tara as a combination tanning agent not only improves the leather properties but also can act as a scavenger of free formaldehyde present in THPS tanned leather. Note de contenu : - MATERIALS AND METHODS : Determination of shrinkage temperature - THPS tara combination tanning - Post Tanning process - Objective assessment of softness through compressibility - Physical testing and hand evaluation of leathers - Color measurement - Environmental impact assessment
- RESULTS AND DISCUSSION : THPS-tara combination tanning : optimization of offer of tara - Optimization of order of addition of tanning agents (THPS and tara) - Preparation of garment leathers - Color measurements - Softness measurements - Environmental impact of THPS - Tara combination tanning system - Role of tara in scavenging of free formaldehyde formed due to THPSEn ligne : https://drive.google.com/file/d/1w-F09wpWH67txRrihNaOdYQUCDhj2jXI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23453
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Code-barres Cote Support Localisation Section Disponibilité 17044 - Périodique Bibliothèque principale Documentaires Disponible Studies on the influence of proteolytic enzymes in leather dyeing / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 12 (12/2006)
PermalinkStudies on the removal of inter-fibrillary materials part I : Removal of protein, proteoglycan, glycosoaminoglycans from conventional beamhouse process / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 5 (05/2010)
PermalinkStudies on the removal of inter-fibrillary materials. Part II : removal of protein, proteoglycan and glycosoaminoglycans from biobased pre-tanning process / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 6 (06/2010)
PermalinkStudies on the stabilization of collagen using dialdehyde starch : Part I. Effect of autoclaving on dialdehyde starch / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 12 (12/2006)
PermalinkSupercritical carbon dioxide based skin preservation : solving the soak liquor effluent crisis of the leather industry / Arun Gopinath in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)
PermalinkTanning agent based on mixed metal complexes of aluminium and zinc / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 9 (09/2001)
PermalinkTanning with natural polymeric materials. Part 1 : Ecofriendly tanning using dialdehyde sodium alginate / Swarna Vinodh Kanth in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)
PermalinkThe impact of potassium persulfate on linseed oil tanning / Bindia Sahu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 8 (08/2022)
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