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Deciphering the role of individual retanning agents on physical properties of leathers / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)
[article]
Titre : Deciphering the role of individual retanning agents on physical properties of leathers Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; Bhuvana Subramanian, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2019 Article en page(s) : p. 94-102 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Biopolymères
Copolymère mélamine-Formaldéhyde
Cuirs et peaux -- Propriétés physiques
Phénoplastes
Polyacryliques
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In post-tanning different types of retanning agents are used in combination to improve the functional properties of leather and therefore understanding the individual effect of each retanning agents on final properties is difficult. This work mainly focuses toward quantifying the individual effect of different weight percentages (4, 8 and 16%) of phenol-formaldehyde resin (PFR), melamine-formaldehyde resin (MFR), acrylic resin (AR) and biopolymers (BP) on physical properties of leather. It was found that the strength characteristics are greatly affected when the retanning agents offer increased above 8% where the effect of phenol-formaldehyde resin is higher than other re-tanning agents. Melamine-formaldehyde resin and biopolymer is predominantly affecting the belly region. It has also been observed that the phenol-formaldehyde resin improves the fullness whereas grain tightness and flatness are improved with increasing the percentages of melamine-formaldehyde resin offer. Biopolymer improves the grain smoothness and the ability of improving the roundness of leather is similar for all kind of retanning agents. A meaningful conclusion could not be drawn in the porosity results obtained due to the heterogeneous nature of leather matrix. Thus, a conventional triplicate method of measurement as done in this study would not suffice to provide a conclusive interpretation of results obtained using capillary flow porometry technique. Note de contenu : - EXPERIMENTAL METHODOLOGY : Analysis of physical strength characteristics - Analysis of porosity
- RESULTS AND DISCUSSIONS : effect of phenol-formaldehyde resin (PFR) on physical strength characteristics - Effect of melamine-formaldehyde resin (MFR) on physical strength characteristics - Effect of acrylic resin (AR) on physical strength characteristics - Effect of protein based biopolymer (BP) on physical strength characteristics - Effect of re-tanning agents on porosity - Effect of re-tanning agents on organoleptic propertiesEn ligne : https://drive.google.com/file/d/1c7oRcD0zU0flHM8vo0i4mnnKr3Fp2TDF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31930
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 3 (03/2019) . - p. 94-102[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20673 - Périodique Bibliothèque principale Documentaires Disponible Deer leather as a material for outerwear / S. Lange in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 4 (07-08/2002)
[article]
Titre : Deer leather as a material for outerwear Type de document : texte imprimé Auteurs : S. Lange, Auteur ; R. M. Laing, Auteur ; B. E. Niven, Auteur ; D. R. Scobie, Auteur ; S. R. Young, Auteur ; S. E. Gore, Auteur Année de publication : 2002 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de cerfs
Statistique
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The objective of this work was to identify the critical physical properties of garment leather, the optimal sampling position on the hide, and the recommended number of hides required from one source to adequately describe selected physical properties relevant to garment manufacture.
Hides from deer of known origin were processed to finished garment leather and selected properties of the finished leather relevant to garment manufacture were measured. Variability in these properties across any one hide, and among hides from different animals was determined and was less than that reported for ovine leather and similar to that reported for woven textiles used in outerwear. The extension of deer leather exceeded that recommended for woven garment materials, and was greater than that observed on ovine leather. The location on a hide, and the number of hides to be sampled from each batch in order to obtain representative results were determined (near the backbone at approximately the fore leg position ; and three, respectively).Note de contenu : - METHODS : Deer hides - Measurement and statistical analysis of properties - Representative location and optimum number of hides
- RESULTS : Sampling site, and number of hides required
- Table 1 : Differences from different groups (age and month of kill) and position on the hide
- Table 2 : Estimated number of hides required for sampling, and the 'ideal location' for samplingEn ligne : https://drive.google.com/file/d/1eAt0o2ScccHR5G6q0lSWzpKon1S4lq1J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39906
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 4 (07-08/2002)[article]Deliming with weak acid-effects on leather quality and effluent / S. M. Colak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)
[article]
Titre : Deliming with weak acid-effects on leather quality and effluent Type de document : texte imprimé Auteurs : S. M. Colak, Auteur ; Eylem Kiliç, Auteur Année de publication : 2008 Article en page(s) : p. 120-123 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides
Ammonium
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de moutons
DéchaulageOpération consistant à débarrasser les peaux de la chaux et des substances alcalines qui leur ont été appliquées au pelanage.
Eaux usées -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Effluent which has a high ammonium content is produced as a result of traditional deliming operation using ammonium salts. Ammonia is converted into nitrate by the nitrogen cycle in nature and ammonium salts discharged into natural water sources have toxic effects on living organisms.In this research weak acids were used to delime in studies on sheep skins to reduce the ammonium load that originates from deliming. Beside the deliming effect of acids, the N content of the resulting discharge water was determined and the effect of these methods on the quality of the leather was studied. The data obtained from the study were compared with the traditional deliming methods and standards. Note de contenu : - Table 1 : Deliming procedure
- Table 2 : Degreasing, pickling, tanning, neutralisation and dyeing procedures
- Table 3 : Total nitrogen values of deliming effluents
- Table 4 : Chemical analysis results of leathers processed using different deliming methods
- Table 5 : Physical test results of leathers processed usingdiffer ent deliming methodsEn ligne : https://drive.google.com/file/d/1d6Ab5ISYhVt5M-CDc1c-dDyuShxmJksX/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38956
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 120-123[article]Development of nano bio aldehyde tanning agent for sustainable leather manufacture / Arjunan Yasothai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)
[article]
Titre : Development of nano bio aldehyde tanning agent for sustainable leather manufacture Type de document : texte imprimé Auteurs : Arjunan Yasothai, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Angayarkanny Subramanian, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2023 Article en page(s) : p. 162-168 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
AldéhydesUn aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
Biopolymères
Caractérisation
Cuirs et peaux
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Essais dynamiques
Morphologie (matériaux)
Nanoparticules
Post-tannage
Stabilité hydrothermale
Tannage organique
Température de retraitIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Exploring the application of natural biopolymers in leather manufacture is a need of the hour to achieve sustainability. The present research work explores the possibility of using modified biopolymer nanoparticles as a tanning agent. Starch, a polysaccharide with high functionalization, is converted into Nano Bio Aldehyde (NBA) through periodate oxidation as water-in-oil microemulsion method. The synthesized product was characterized by its physico-chemical nature. The prepared NBA shows an aldehyde content of 85%, which endorses its application as a tanning agent. Experimental leather trials were carried out to assess the tanning efficacy and found that NBA tanned leathers show a shrinkage temperature of 90°C. Physical characteristics of the experimental leathers were found to be 24 N/mm2 and 90 N for tensile and tear strength, respectively. The study provides a holistic understanding of modified biopolymer as a nano tanning agent to manufacture leather. Note de contenu : - MATERIALS AND METHODS : Materials
- METHODS : Preparation of nanobioaldehyde particles - Characterization of the product NBA : Determination of aldehyde content - Fourier Transform Infrared (FTIR) analysis - Particle size analysis - Thermogravimetric analysis (TGA) - Differential Scanning Calorimetric (DSC) analysis - Preparation of DAS and NBA tanned leathers - Characterization of DAS and NBA tanned leathers hydrothermal stability measurement - Mechanical strength - Subjective evaluation of cprocessed leathers - Morphological evaluation
- RESULTS AND DISCUSSION : Structural alterations in NBA - The morphological structure of SS and NBA - Characteristics of the prepared particles - Thermal properties of SS and NBA - Hydrothermal resistance of tanned leathers - Physical strength characteristics of the crust leathers - Subjective evaluation of the tanned crust leathers - Morphological structures of control and experimental tanned leathers
- Table 1 : Experimental NBA tanning process
- Table 2 : Post tanning process
- Table 3 : Physical strength properties of control and experimental NBA tanned leather
- Table 4 : Organoleptic properties of NBA tanned leatherDOI : https://doi.org/10.34314/jalca.v118i4.7208 En ligne : https://drive.google.com/file/d/1Mx9yT5dde0Awk0tShiDIUvsrqIc5RIkt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39185
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 4 (04/2023) . - p. 162-168[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24030 - Périodique Bibliothèque principale Documentaires Disponible Development of natural colours in Cr-Fe tanned garment leathers / J. R. Rao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
[article]
Titre : Development of natural colours in Cr-Fe tanned garment leathers Type de document : texte imprimé Auteurs : J. R. Rao, Auteur ; Palanisamy Thanikaivelan, Auteur ; J. Malathi, Auteur ; R. Rajaram, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2002 Article en page(s) : p. 106-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants
chataigner et constituants
Chrome
Colorimétrie
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
Cuirs et peaux -- Teinture
Fer
Myrobalan et constituants
QuebrachoLe quebracho est un arbre à écorce ligneuse, mesurant 30 mètres de haut, à feuilles tannées et à fleurs tubulées blanches.
Quebracho est l'un des noms communs, en espagnol, d'au moins trois espèces similaires d'arbres originaires du Gran Chaco, en Amérique latine : Schinopsis lorentzii (quebracho colorado santiagueño), de la famille des Anacardiaceae ; Schinopsis balansae (quebracho colorado chaqueño), de la même famille ;
Aspidosperma quebracho-blanco (quebracho blanc), de la famille des Apocynaceae.
Ces trois espèces sont riches en tanin et fournissent un bois très dur, particulièrement résistant. Leur nom provient de l'espagnol quiebrahacha, qui signifie brise-hache.
Réflectance
Résistance à l'abrasion
Tanins végétaux
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Dyes based on synthetic formulations are widely used in the leather industry, however, many aryl amine dyes are restricted due to their carcinogenic nature. Environmental concern leads one to look for the dye products based on natural resources, which may have advantages of biodegradability and lower toxicity. We aimed to create an eco-friendly dyeing process by forming in-situ complexes between vegetable tannins and the Cr-Fe tanning salt, where the use of iron salts results in various colours on reaction with various vegetable tannins. Sheepskins were tanned using the Cr-Fe tanning salt and treated with various vegetable tanning materials, brown, black and grey shades were developed. The shades obtained have been quantified by reflectance measurements and compared by visual assessment.
Strength characteristics of the leathers treated with 5% vegetable tannins are higher than those treated with 1% tannins, bulk properties not being affected with the increase in concentration from 1 to 5%. The light, wet and dry rub fastness of the naturally coloured leathers are good with no change on ageing. Colour reproduction at bulk level production is acceptable with minor batch variations.Note de contenu : - EXPERIMENTAL DETAILS : Process details for larger scale trials - Physical testing
- RESULTS AND DISCUSSION : Wattle - Chestnut - Myrobalan - Quebracho - Environmental Perception
- Table 1 : Percentage reflectance measurement for garment leathers coloured with various concentrations of wattle
- Table 2 : Visual assessment data of the garment samples treated with various concentrations of wattle (Grade points 0-poor and 10-very good)
- Table 3 : Visual assessment data of the garment samples treated with various concentrations of chestnut (Grade points 0-poor and 10-very good)
- Table 4 : Visual assessment data of the garment samples treated with various concentrations of myrobalan (Grade points 0-poor and 10-very good)
- Table 5 : Percentage reflectance measurement for garment leathers coloured with various concentrations of quebrancho
- Table 6 : Visual assessment data of the garment samples treated with various concentrations of quebracho (Grade points 0-poor and 10-very good)
- Table 7 : Strength characteristics for various crust garment leathers
- Table 8 : Visual assessment data for garment leathers treated with selected concentrations of vegetable tannins
- Table 9 : Fastness of the naturally coloured leathers treated with selected concentration of vegetable tannins to wet, dry rubbing and artificial light
- Table 9 : Comparison of colour measurements data between the sample and bulk colouration of leathers using selected concentration vegetable tanninsEn ligne : https://drive.google.com/file/d/1cy6baDBVvluD26gKPLzG7iFzZjo83l1w/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39924
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 106-111[article]Drum salting hides and skins / G. W. Vivian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
PermalinkDrum salting hides and skins / G. W. Vivian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 6 (11-12/1976)
PermalinkEco-friendly leather dyeing using ultrasound technique / Mohamed Abu Sayid Mia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)
PermalinkEffect of accelerated ageing on the physical and chemical properties of chrome-free leather / R. Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
PermalinkEffect 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)
PermalinkEffect 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)
PermalinkEffect of pigment-acrylic binder ratio on the surface and physical properties of resin finished leather / Suriya Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 1 (01/2024)
PermalinkEfficient and ecological leather processing : replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride / Hui Liu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkEnvironmental credentials of vehicles / Abigail Clare in INTERNATIONAL LEATHER MAKER (ILM), N° 53 (05-06/2022)
PermalinkEssais physiques des cuirs / Roland Cortès / 1979
PermalinkPermalinkEtude de la solidité de la fleur en fonction de l'imprégnation / A. Schoenfeld in TECHNICUIR, (Années 1969-1970)
PermalinkEvaluation of collagen hydrolysate on the performance properties of different wet-white tanned leathers / Yusuf Dilek in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 3 (05-06/2019)
PermalinkEvaluation of the physical properties of goatskins tanned using banana (Musa spp.) leaf midrib tannins / James K. Wangui in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 1 (01/2024)
PermalinkGreen synthesis of monodispersed iron oxide nanoparticles for leather finishing / M. Nidhin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 6 (06/2014)
PermalinkHide and leather characteristics of afrikaner and friesland bulls and steers slaughtered at various ages between birth and 24 months / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkHide and skins : physical change and effects within chemical processing / Richard Daniels in WORLD LEATHER, Vol. 18, N° 5 (08/2005)
PermalinkHides and skins : temperature and physical change / Richard Daniels in WORLD LEATHER, Vol. 18, N° 5 (08/2005)
PermalinkHigh exhaust tanning systems using a novel cross-linking agent (CA) / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)
PermalinkIndigenous Arctic fish skin / Elisa Palomino in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)
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