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Auteur Palanisamy Thanikaivelan
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Advanced Materials Laboratory - Adyar, Chennai - 600 020, India
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A novel formaldehyde-free synthetic chrome tanning agent for pickle-less chrome tanning : comparative study on syntan versus modified basic chromium sulfate / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 4 (04/2002)
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Titre : A novel formaldehyde-free synthetic chrome tanning agent for pickle-less chrome tanning : comparative study on syntan versus modified basic chromium sulfate Type de document : texte imprimé Auteurs : Palanisamy Thanikaivelan, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao ; J. Kanthimathi, Auteur Année de publication : 2002 Article en page(s) : p. 127-136 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : An eco-friendly synthetic chrome tanning salt has been prepared through various routes for application at delimed stage viz., conventional preparation using basic chromium sulphate, sulfonated aromatic hydrocarbon, poly carboxylic acid and organic ligands (product 1); in-situ preparation in the manufacture of BCS by introducing the above ingredients excluding pre-made BCS (product 2); in-situ preparation in the manufacture of BCS by introducing the above ingredients excluding pre-made BCS and aromatic hydrocarbon (product 3). A comparative study has been made for their technical aptness, economic viability and environmental friendliness. It has been found that all the products can be used after deliming without the fear of surface deposition. Fullness of the leathers tanned with the products containing aromatic hydrocarbon (AHC) is generally higher than the product without AHC. The scanning electron microscopic (SEM) studies and visual analysis support the above view. The analysis of the identified process streams show that the TS, Cl- and chromium loads are curtailed by 80, 99 and 94%, respectively. The strength and bulk properties of the crust leathers are similar or improved when the integrated product/process is employed. The techno-economic viability study reveals that the chemicals, water, time and power requirements for tanning are reduced by nearly 50% for all the products. However, product 3 tanned leathers need adequate filling during post tanning as conventionally processed. Hence, in spite of its low cost criteria, the use of product 3 is disregarded for tanning skins for fullness-based products. Products 1 and 2 enable the reduction of post tanning syntans by 50% thus reducing the cost of leather production considerably. Especially, product 2 offers a profit oriented pickle-less chrome tanning process. En ligne : https://drive.google.com/file/d/1ULStbIBxaNvxOlLeu1kkvBJaZMHS53Sm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4310
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVII, N° 4 (04/2002) . - p. 127-136[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001573 - Périodique Bibliothèque principale Documentaires Disponible Performance and eco-impact of reverse processed hair sheep gloving leather / Subramani Saravanabhavan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 9 (09/2008)
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Titre : Performance and eco-impact of reverse processed hair sheep gloving leather Type de document : texte imprimé Auteurs : Subramani Saravanabhavan, Auteur ; Palanisamy Thanikaivelan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2008 Article en page(s) : p. 303-313 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather processing, the world over, follows the pretanning, tanning, post-tanning and finishing sequence. It involves manyu process steps and huge pH variations thus discharges enormous amount of pollutants. A prudent analysis of the conventional leather process shows that the sequence follows do-undo logic. In this study, the conventional proccessing sequence has been reversed to reduce the number of process steps and pH variations thereby achieving resource and polution reductions. Hair sheepskins have been processed using both conventional and reverse processes for gloving application. Reverse process involves pretanning, post tanning, tanning and finishing sequence. The pH and charges of skin matrix after deliming are wisely utilized to apply post-tanning chemicals followed by chrome tanning salt the processed leathers have been analyzed for chromium content, shrinkage temperature, strength and bulk properties. A set of turn-key tests have been carried out to verify whether the reverse processedleathers meet military specifications. The performance of reverse processed glove leathers is shown tobe on par with conventionally processed leathers and meet the specifications predominantly. Especially, chrome content of reverse processed leathers is higher than control leather, which is corroborated through X-ray fluorescence analysis. The process enjoys significant reduction in COD and TS loads by 53 and 70%. Also, the process benefits from significant reductions in water, wastewater discharge, chemicals, time, power and cost compared to conventional process. En ligne : https://drive.google.com/file/d/1N6_bpTXaHI3bO3Nz8ElTo5Gtg5uX1Cw1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2513
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 9 (09/2008) . - p. 303-313[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010636 - Périodique Bibliothèque principale Documentaires Disponible Performance evaluation of pelts and leather from domestic hair sheep crossbreeds / Dennis C. Shelly in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 6 (06/2009)
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Titre : Performance evaluation of pelts and leather from domestic hair sheep crossbreeds Type de document : texte imprimé Auteurs : Dennis C. Shelly, Auteur ; Divya Pasapulati, Auteur ; Palanisamy Thanikaivelan, Auteur ; Biyu Peng, Auteur ; Clinton Hodges, Auteur Année de publication : 2009 Article en page(s) : p. 194-203 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The attributes and physical properties of pelts and leather from selected hair sheep crossbreeds were assessed. Four different sheep breed classes (from Rambouillet, Dorpcroix, Barbados and Dorper), each with about 20 individuals, were included. Spanish goats were used as a control. Animals were raised and finished under identical conditions and flayed pelts were enumerated and processed to finished leather by commercial firms. Pelts and leathers were evaluated at Texas Tech for stretch, softness, fullness, grade, tensile strength, % elongation at break, stiffness, softness (negative slope angle), area yield, hair pore count, grain-to-corium thickness ratio and hide substance (Kjeldahl). Organoleptic and instrumental analysis results are presented and correlated. An objective scoring criterion is proposed. Comparisons across the breed classes are made. Outstanding and/or noteworthy performance scores are noted and recommendations for end-use applications are given. En ligne : https://drive.google.com/file/d/1TZ0hADs9DP2FmOOCKUPtqlJk4y9LM3TQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5985
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 6 (06/2009) . - p. 194-203[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011388 - Périodique Bibliothèque principale Documentaires Disponible Relation between drape and mechanical properties of goat suede garment leathers / K. Krishnaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 1 (01-02/2009)
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Titre : Relation between drape and mechanical properties of goat suede garment leathers Type de document : texte imprimé Auteurs : K. Krishnaraj, Auteur ; B. Chandrasekaran, Auteur ; Palanisamy Thanikaivelan, Auteur Année de publication : 2009 Article en page(s) : p. 1-7 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de chèvres
Cuirs et peaux de daims
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Understanding the properties of leathers associated with garment construction provides valuable inputs for the design and fabrication of leather garments. Drape is one such important property. In this study, drape coefficient and the number of nodes were measured for goat suede leathers from four different firms and compared with mechanical properties which influence garment construction, such as softness, flexural rigidity, initial tensile modulus, formability, weight and thickness. The mean drape coefficient ranges between 20.8 and 4.04 % and the number of nodes varies from 6 to 8 for the selected goad suede leathers from four different firms. Softness, flexural rigidity, formability, thickness and weight have been shown to influence the drape parameters such as drape coefficient and the number of nodes significantly. The results of this study can be used as a basic tool for leather selection to facilitate the design and construction of garments. En ligne : https://drive.google.com/file/d/1W9ztsfh3hbCp8_kvcJzD_tcjt79EgXS8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4078
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 1 (01-02/2009) . - p. 1-7[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011127 - Périodique Bibliothèque principale Documentaires Disponible Single step hair removal and fiber opening process : Simultaneous and successive addition of protease and a-amyiase / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 11 (11/2006)
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Titre : Single step hair removal and fiber opening process : Simultaneous and successive addition of protease and a-amyiase Type de document : texte imprimé Auteurs : Palanisamy Thanikaivelan, Auteur ; B. Chandrasekaran, Auteur ; C. K. Bharath, Auteur ; Subramani Saravanabhavan, Auteur ; C. Anandhi, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2006 Article en page(s) : p. 388-398 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The use of enzyme based products for many areas in leather making has found its way into commercial practice. Proteolysis and a-amylase enzymes have found use in hair removal and fiber opening, producing comparable results to the conventional practice of lime and sulfide based dehairing and fiber opening. However, this process is a two step sequence in which dehairing is performed by the proteolysis enzyme followed by fiber opening through a-amylase. This study aims at transforming the two-step method into a single-step process, while maintaining environmental sustainability. Experiments were carried out using various percentages of dehairing enzyme and a-amylase following successive, simultaneous addition. The order of addition of the enzymes is also varied. Standardization experiments at bulk level were carried out to obtain best results. The leathers obtained from simultaneous addition of enzymes (1 % protease and 0.75 % a-amylase) were comparable to that of the conventionally produced leathers in terms of physical properties and appearance. The input-output analysis shows complete dehairing and fiber opening, which is also confirmed through scanning electron micrographs. There is reasonable reduction in water consumption, wastewater discharge, COD and TS loads when compared to the conventional leather processing. En ligne : https://drive.google.com/file/d/1jP8zEP1uDaan8sy04ImHihO5DjlTXhUI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3969
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Code-barres Cote Support Localisation Section Disponibilité 005798 - Périodique Bibliothèque principale Documentaires Disponible Stepping into third millennium : Third generation leather processing : A three step tanning technique / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 5 (05/2003)
PermalinkStudies on the development of pickle-sess vegetable tanning / Subramani Saravanabhavan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 7 (07/2004)
PermalinkSynergy of organic nanoclay and inorganic phosphates for fire retardant leather applications / Jima Demisie Wegene in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 11 (11/2018)
PermalinkTanning studies with basic chromium sulfate prepared using chrome shavings as a reductant : A call for 'wealth from waste' approach to the tanning industry / Jonnalagadda Raghava Rao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 4 (04/2004)
PermalinkThe development of an integrated rechroming-neutralization-post tanning proces manufacture of upper leathers from goatskins / T. Ayyasamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
PermalinkUnderlying principles in chrome tanning : Part 1. Conceptual design of pickle-less tanning / Wondu Legesse in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 12 (12/2002)
PermalinkUnderlying principles in chrome tanning : Part 2. Underpinning mechanism in pickle-less tanning / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 2 (02/2004)
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