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Acrylic polymeric binder for leather finishing application / Michael Ifeanyichukwu Ugbaja / Saarbrücken [Germany] : Lambert Academic Publishing (2016)
Titre : Acrylic polymeric binder for leather finishing application : Water vapour permeability and some other physical properties of leathers - Effect of finish formulations Type de document : texte imprimé Auteurs : Michael Ifeanyichukwu Ugbaja, Auteur ; Ejila Amali, Auteur Editeur : Saarbrücken [Germany] : Lambert Academic Publishing Année de publication : 2016 Importance : IX-84 p. Présentation : ill. Format : 22 cm ISBN/ISSN/EAN : 978-3-659-91685-4 Prix : 49,90 E Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés physiques
Formulation (Génie chimique)
Liants
Perméabilité
Plan d'expérience
Polyacryliques
Polymérisation en émulsion
Retannage
Tannage
Vapeur d'eauIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This book is a simple and concise introduction to the effect of polymeric binders in the performance of a finished leather. It aims at exposing the formulation requirements of certain acrylic resin binder suitable for leather finishing applications. The materials are presented in a manner to benefit both the students studying leather science and technology or leather engineering in tertiary institutions as well as those in the leather industry whose knowledge in this technology is deficient. Students of polymer science and technology will also appreciate the contents of this book as it tries to study the effect acrylic polymer resin in the performance of finished leathers. This book will assist mostly undergraduates in understanding the processes of leather making,formulation of finishing agents, properties and behavior of finished leather. It will also benefit those with little or no technical background in leather processes as well as those who have sophisticated background in science but no experience in the leather industry. It will also make for a good reading material for the general public that are yet to know what synergy exist between polymers and leather. Note de contenu : - GENERALITES : Description of leather - Forms of leather - Types of leather - Leather manufacturing processes - Acrylic polymer - Polymerisation techniques - Components of emulsion polymerisation reaction - Principle of emulsion polymerisation - Leather finishing
- REVIEW OF LITERATURE : General introduction - Synthetic resin dispersions for leather finishing - Synthesis of polymer dispersions - Characterisation of polymer dispersions and effect on properties of retanned leathers - Factors affecting physical properties of finished leathers - Retannage and properties of finished leathers - Water vapour permeability, wvp of finished leathers - Effect of important variables on water vapor permeability
- DESIGN OF EXPERIMENT : Experimental procedures
- RESULTS : Examination of resin binder - Physical testing of the finished leather substrate
- DISCUSSION
- CONCLUSION AND RECOMMENDATIONS
- ANNEXES : A. Some chemicals used in leather processing - B. Definition of some leather processing termsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36813 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23152 675 IFE Monographie Bibliothèque principale Documentaires Disponible Documents numériques
Acrylic polymeric binder for leather finishing application : Water vapour permeability and some other physical properties of leathers - Effect of finish formulationsURL Aliphatic anionic polyurethane microemulsion leather filling-retanning agent / Bao Lihong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 2 (03-04/2007)
[article]
Titre : Aliphatic anionic polyurethane microemulsion leather filling-retanning agent Type de document : texte imprimé Auteurs : Bao Lihong, Auteur ; Lan Yunjun, Auteur ; Shufen Zhang, Auteur Année de publication : 2007 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Caractérisation
Charges (matériaux)
Chimie analytique
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Formulation (Génie chimique)
Imperméabilisation
Microémulsions
Poids moléculaires
Polymères aliphatiques
Polyuréthanes
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The retanning process plays an important role in optimizing the leather’s colour, levelness, softness, fullness, and hydrophobicity. Polymer retanning agents are important materials for this process. The present study used maleic anhydride modified castor oil (MCO), PEG1000 (polyethylene glycol) and IPDI (isophorone diisocyanate) as main materials to synthesize polyurethane microemulsions (MC-PURs) and employed them to retan chrometanned leathers. The hydroxyl functionality of MCO was investigated by chemical and 1HNMR analysis, and confirmed to be about 2.0. The chemical structures of MCO, prepolymer and MC-PUR were characterized by IR.
The optimized synthesis formulation and polyurethane microemulsion MC-PUR3 for MC-PURs as retanning agent was selected by comparing the properties of retanned leathers, such as softness, fullness, grain tightness, tensile strength, extension at break, depth of shade, waterproof properties et al. Then, MC-PUR3 was characterized by means of DSC, TG/DTG and TEM techniques. SEM microgram of MC-PUR3 retanned leather shows that the fibres are well dispersed.Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of maleic anhydride modified castor oil (MCO) - Preparation of microemulsions of polyurethane filling retanning agents (MC-PURs) - Determination of molecular weight - H n.m.r. spectroscopy - Purification - FT-IR spectroscopy - Differential scanning spectroscopy - Thermo-gravimetric analysis - Transmission electron microscope analysis - Measurement of final dyebath exhaustion - Physical and waterproofness properties of leathers - Organoleptic properties of the final leathers - Scanning electron microscopic analysis
- RESULTS AND DISCUSSION : Determination of the average molecular weight, hydroxyl number and average hydroxyl functionality (Fn(OH)) of MCO - Determination of the average hydroxyl functionality of MCO by chemical analysis - Determination of the average hydroxyl functionality of MCO by 1HNMR - Chemical structure analysis by IR
- OPTIMIZATION OF RETANNING AGENT : Effect of MCO/PEG1000 mass ratio on the properties of retanned leathers - Effect of carboxyl content of MC-PUR on the properties of retanned leathers - Effect of NCO/OH molar ratio on the properties of retanned leathers - Thermal properties of MC-PUR3
- Table 1 : Basic formulations of MC-PURs
- Table 2 : Filling, retanning and wet finishing processes
- Table 3 : Effect of MCO/PEG1000 mass ratio on the properties of retanned leathers
- Table 4 : Effect of carboxyl content of MC-PUR on the properties of retanned leathers
- Table 5 : Effect of NCO/OH molar ratio on the properties of retanned leathersEn ligne : https://drive.google.com/file/d/19ti2BicD3kfHFF4Z4QLX1cSWPC0J39gs/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39037
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 2 (03-04/2007) . - p. 73-80[article]Alternative tanning agent for leather industry from a sustainable source : Dialdehyde starch by periodate oxidation / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 3 (03/2021)
[article]
Titre : Alternative tanning agent for leather industry from a sustainable source : Dialdehyde starch by periodate oxidation Type de document : texte imprimé Auteurs : Cigdem Kilicarislan Ozkan, Auteur ; Hasan Ozgunay, Auteur Année de publication : 2021 Article en page(s) : p. 89-99 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage
Amidon dialdéhyde
Amidons -- Oxydation
Caractérisation
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Poids moléculaires
Tannage
Tannage -- Aspect de l'environnementIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Dialdehyde starches with different aldehyde content from native corn starch were prepared by sodium periodate oxidation to be used as a tanning agent in leather making. For this purpose, native corn starch was oxidized with sodium metaperiodate in different molar ratios. After oxidation processes, the yields, solubility in water and aldehyde contents of the obtained dialdehyde starches were determined as well as structure characterizations by Proton Nuclear Magnetic Resonance Spectroscopy, Fourier Transform Infrared Spectroscopy and Gel Permeation Chromatography. Evaluating the gel permeation chromatography data, the dialdehyde starch samples which were thought to be in appropriate molecular weight/size to penetrate into skin fibers were selected to be used in the tanning process. Their tanning abilities were evaluated by investigating hydrothermal stabilities, filling and fiber isolation characteristics and physical properties determined by mechanical tests and organoleptically. From the evaluation of the results, it was revealed that sodium metaperiodate oxidized starches which have appropriate molecular weight and adequate aldehyde content has a remarkable tanning effect and can be utilized as a tanning agent with the advantages of not necessitating pickling process which means saving time and simplifying the production but more importantly offering an important advantage from an environmental point of view. Note de contenu : - Characterizations
- Tanning properties of dialdehyde starch samples
- Table 1 : Tanning recipe for the pelt pieces
- Table 2 : Molecular weight distribution of native and oxidized starches
- Table 3 : Tanning properties of oxidized starches
- Table 4 : Physical properties of tanned leathers with oxidized starches
- Table 5 : Organoleptical properties of tanned leathers with oxidized starchesDOI : https://doi.org/10.34314/jalca.v116i3.4249 En ligne : https://drive.google.com/file/d/1Ao7z1sapfoabaz0Uek5C2uMsZkBOMAoh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35436
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 3 (03/2021) . - p. 89-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22638 - Périodique Bibliothèque principale Documentaires Disponible An examination of several chrome tannages and their effect on chrome exhaustion / Vetaut Goniprow in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)
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Titre : An examination of several chrome tannages and their effect on chrome exhaustion Type de document : texte imprimé Auteurs : Vetaut Goniprow, Auteur ; Scott D. Fields, Auteur Année de publication : 1979 Article en page(s) : p. 6-13 Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés physiques
Cuirs et peaux -- Teneur en oxyde de chrome
Eaux usées -- Analyse
Eaux usées -- Teneur en oxyde de chrome
Tannage au chrome
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-SynthétiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanners have long employed combinations of various tanning agents to achieve a variety of leather characteristics. Recent emphasis on reducing waste chromium makes it valuable to re-examinesome of these combination tannages and to introduce other variations to determine their effects on chrome uptake and exhaustion. In this work sides in the lime from a tannery were divided into lots, and each lot was processed using a different tannage. The resulting leathers were analyzed for their physical and aesthetic qualities and for chromic oxide content. Tanning wheel effluent was also analyzed for chromic oxide. Processes and results were compared and some conclusions were reached regarding various tannages as a means of reducing waste chromium. Note de contenu : - Table 1 : Chrome (Cr2O3) content of leathers and effluents
- Table 2 : Physical test results from selected samplesEn ligne : https://drive.google.com/file/d/1kNGTxYYyt2aMwhJCENRhiVEc9DBy3OJI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37217
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIV (Année 1979) . - p. 6-13[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008512 - Périodique Archives Documentaires Exclu du prêt An oil tanning process accelerated by oxidation with sodium percarbonate / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 5 (09-10/2008)
[article]
Titre : An oil tanning process accelerated by oxidation with sodium percarbonate Type de document : texte imprimé Auteurs : Hongru Wang, Auteur ; Ma Yuanyue, Auteur ; Nian Yue, Auteur Année de publication : 2008 Article en page(s) : p. 205-209 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chamoisage Le chamoisage est une technique artisanale qui consiste à fabriquer un type de cuir très souple et de grande qualité, utilisé notamment dans la ganterie. L'atelier où se pratique cette activité est appelé une "chamoiserie", tandis que l'artisan dont c'est la spécialité est un "chamoiseur".
Ce cuir était autrefois fabriqué à partir de peaux de chamois (d'où l'origine du mois "chamoisage") traitées avec de l'huile de poisson, ce qui en faisait un produit rare et cher. Les artisans essayaient donc de fabriquer des cuirs aux qualités approchantes en utilisant la peau d'animaux d'élevage, un tel cuir est alors appelé "peau chamoisée".
Le chamoisage est désormais pratiqué sur les mêmes types de peaux que celles utilisées en mégisserie (agneau, chèvre, vachette, mouton…). Il met en œuvre les mêmes opérations que la mégisserie jusqu'à l'étape de "gonflement". Les peaux sont alors étendues et enduites avec de l'huile de poisson, puis frappées avec un fouloir pour faire pénétrer l'huile. Durant cette étape on expose régulièrement les peaux à l'air (on les "évente"), tout en ajoutant de l'huile.
La dernière opération du chamoisage est le "remaillage" qui consiste à faire "cotonner" la peau en arrachant sa "fleur" avec un couteau qui ne tranche pas.
Un sous-produit du chamoisage, le "dégras", est très recherché par les corroyeurs pour apprêter leurs cuirs.
Il existe une norme française AFNOR qui s'applique aux peaux chamoisées : NF G59-001 de janvier 1981, Cuirs et peaux - Peaux chamoisées - Présentation, dimensions et marquage.
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de Chamois
Huiles et graisses -- Oxydation
Huiles et graisses de poissons
Percarbonate de sodiumIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to reduce the oxidation time in oil tannage and to standardize the drumming conditions for optimum tannage, we established an oil tanning process accelerated by oxidation with sodium percarbonate. The oxidation of the oil was confirmed by IR spectra, and the effect of the oxidation conditions on peroxide value of the oil were investigated. The physical properties of the chamois leathers obtained were determined. The results show that a higher peroxide value of 248-278mmol.kg could be maintained at 25°C for 6 hours by addition of 4% sodium percarbonate and 0.3% catalyst with 50% water (percentages on the oil weight) during oxidation. Under these conditions, the oil undergoes a large increase in thenumber of hydroxyl groups and a large decrease in C=C bonds. The chamois leathers obtained had strengths, extensions and water absorption characteristics comparable to those of a conventionally processed leather. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of Venturello catalyst - Preparation of the pelts - Oil tannage accelerated by oxidation with sodium percarbonate - Conventional oil tannage - Examination of oil and leather
- RESULTS AND DISCUSSION : Peroxide value of the oil during the oxidation - IR spectrum of the oxidized oil - Physical properties of the chamois
- Fig. 1 : Effect of sodium percarbonate on peroxide value
- Fig. 2 : Effect of temperature on peroxide value
- Fig. 3 : Effect of water on peroxide value
- Fig. 4 : Effect of catalyst on peroxide value
- Fig. 5 : IR spectrum of fish oil
- Fig. 6 : IR spectrum of oxidized fish oil
- Table 1 : Physical properties of the chamoisPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35252
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 5 (09-10/2008) . - p. 205-209[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21781 - Périodique Bibliothèque principale Documentaires Disponible Analyzing the mechanism and effect of acid protease in wet blue bating process for leather production / Hao Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)
PermalinkApplication of an enzymatic bate from local materials / M. M. Ahmed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)
PermalinkApplication of carboxyl-functionalized epoxy resin in the leather tanning process / Bin Lyu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 7 (07/2018)
PermalinkApplication of ultrasound in eco-friendly fatliquoring of leather / Mohamed Abu Sayid Mia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 3 (20/03/2024)
PermalinkApplication of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 11 (11/2017)
PermalinkAugmentation of garment sheepskin type properties in goatskins : Role of chromium-silica tanning agent / N. N. Fathima in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 6 (11-12/2003)
PermalinkBiomass-based tanning agent for sustainable leather manufacture via cyanuric chloride modified chitooligosaccharide / Min Jiang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 10 (10/2023)
PermalinkCartographie physico-mécanique d'un lot de peaux conséquences sur le contrôle à la réception des peausseries / Service Calcul et Statistique (C.T.C, Lyon) in TECHNICUIR, N° 1 (01/1981)
PermalinkCastor oil-rubberseed oil blend as a leather lubricant / A. S. Olawale in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 2 (03-04/2002)
PermalinkCharacteristics of lightweight grain leather with improved foamability and properties using wet-foaming technology / Eun Chul Shin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
PermalinkPermalinkA chrome-free combination tanning strategy : based on silicic acid and plant tannin / Zetian Zhang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)
PermalinkCleaner processing of leather and its wastes / James Kanagaraj / Saarbrücken [Germany] : Lambert Academic Publishing (2010)
PermalinkClosed circulator sole leather tannages at ambient temperatures / D. A. Williams-Wynn in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 10 (10/1970)
PermalinkCombination of white minerals with natural tannins : chrome-free tannage for garment leathers / Subramanian Saravanabhavan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 2 (03-04/2004)
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