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JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 88, N° 6Mention de date : 11-12/2004Paru le : 15/11/2004 |
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Ajouter le résultat dans votre panierUse of waste collagen as a filler for rubber compounds / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
[article]
Titre : Use of waste collagen as a filler for rubber compounds Type de document : texte imprimé Auteurs : Anita Przepiórkowska, Auteur ; M. Prochon, Auteur ; M. Zaborski, Auteur Année de publication : 2004 Article en page(s) : p. 223-227 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Caoutchouc -- Propriétés mécaniques
Caoutchouc isoprène
Collagène -- Recyclage
Cuirs et peaux -- Déchets -- Recyclage
Elastomères -- Synthèse
Mélanges (chimie)
Poudre de cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the processes of leather dressing as well as in nontanned hide processing, there are considerable losses of collagen. Half of the hide collagen is rejected as waste products from the technological process.
The methods of leather waste utilization have been reviewed by Przepiórkowska et al. The literature suggests that leather wastes often are not chemically treated, while their properties such as fibrous character, heat stability, sorption capabilities and increased friction coefficient are utilized. However, the methods of detanning, chemical or enzymatic hydrolysis of chrome tanned wastes yield various forms of degraded collagen. According to many researchers, the detanning of chrome tanned wastes always fail to recover collagen protein in its original form. According to Heidemann, most of the long existing methods for the utilization of chrome tanned wastes cannot be practically implemented. In this connection it is necessary to develop such utilization methods that could provide products whose price would make up for the costs of raw materials and processing. This problem has been studied at the Institute of Polymers. The present study is aimed at the management of difficult wastes such as shavings of chrome tanned leathers from the tanning industry.
The waste collagen was utilized to produce elastomer composites. The incorporation of protein into a rubber compound containing synthetic isoprene rubber should provide a product with properties similar to those of a natural rubber mix, as it is well known that natural rubber contains some amount of protein in its composition.Note de contenu : - Thermal analysis of leather powders
- Mechanical properties of vulcanizates
- Table 1 : The composition of rubber mixes containing collagen
- Table 2 : Effect of collagen on the strength properties of vulcanizates of synthetic isoprene rubber
- Table 3 : Effect of collagen on the strength properties of vulcanizates of synthetic isoprene rubber after ageingEn ligne : https://drive.google.com/file/d/1BdMIEC6AHz-xt-2UtA9NlAX7SNUaKkVg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39613
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 223-227[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Phosphate modified lanolin fatliquors produced by a sustained-released method / Wang Xue-Chuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Phosphate modified lanolin fatliquors produced by a sustained-released method Type de document : texte imprimé Auteurs : Wang Xue-Chuan, Auteur ; Feng Yan-Juan, Auteur ; An Hua-Rui, Auteur ; Sun Ming, Auteur Année de publication : 2004 Article en page(s) : p. 228-230 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Huiles et graisses
Lanoline
Matériaux -- Modifications chimiques
Phosphates
Produits de nourriture du cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The synthesis of a phosphate modified lanolin fatliquor was made using ethanolamine via lanoline amidate reaction followed by the phosphate reaction by a sustained-release method using P2O5 dispersed in a solvent. The phosphate reaction confirmed that the best conditions were at 75°C for 2.5 hrs with a 3.0:1.0 molar ratio of hydroxy to P2O5. The result indicated that mole fraction of phosphoric acid monoester (MAP) made by the sustained-release method and the conversion of P2O5 increased by 12.3% and 5.7% respectively compared to the direct addition of P2O5 method. Phosphate fatliquor preparation by this method overcomes the odour problem of lanoline and is controllable. It is an eco-friendly reaction without wastage and is in accord with the demands of green production. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Reaction principal of lanolin and alcohol amine - Reaction principal of phosphate - Phosphate reaction - Analysis and testing the of the chemical intermediate
- RESULTS AND DISCUSSION : Amidate reaction of lanolin - Selection of solvent for dispersion of P2O5 11 - The phosphate reaction
- Table 1 : Factors and levels
- Table 2 : Appearance of the phosphate lanolin synthesised using different solvents
- Table 3 : The results of the orthogonal experimentEn ligne : https://drive.google.com/file/d/1cOW4Eo0nTk2pNJR_24MBNXwTKXmTnxi1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39614
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 228-230[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Effect of vinyl acetate grafting on the dyeability of chrome leather / O. A. Mohamed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Effect of vinyl acetate grafting on the dyeability of chrome leather Type de document : texte imprimé Auteurs : O. A. Mohamed, Auteur ; A. A. Haroun, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2004 Article en page(s) : p. 231-235 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de vinyle L'acétate de vinyle est l'ester de l'acide acétique (acide éthanoïque) avec le tautomère alcoolique de l'éthanal (acétaldéhyde) et de formule semi-développée, CH3COO–CH=CH2.
L'acétate de vinyle est préparé, en règle générale, en phase vapeur, en faisant réagir un grand excès d'acétylène sur de l'acide acétique (200 °C) en présence de catalyseurs au zinc et au cadmium). On obtient un liquide incolore à odeur très pénétrante qui ne se polymérise en polyacétate de vinyle (PVAC) qu'en présence de catalyseurs et donne des solides durs très stables à la chaleur. Il peut être copolymérisé avec d'autres composés vinyliques ou d'autres monomères.
Colorants réactifs
Colorants vinyl sulfones
Cuirs et peaux -- Teinture
Fixation (chimie)
Greffage (chimie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study is concerned with enhancing the dyeability of leather using a vinyl acetate monomer. The application of a vinyl sulfone reactive dye to the grafted leather revealed that vinyl acetate imparted additional sites to the leather available for attachment of the reactive dye. Note de contenu : - MATERIALS AND METHODS : Grafting methods - Standard dyeing method - Dyeing properties
- RESULTS AND DISCUSSION : 1- Effect of monomer concentration on the degree of grafting - 2- Effect of ceric ammonium sulfate level on the degree of grafting - 3- Effect of pH on the degree of grafting
- Table 1 : Effect of vinyl acetate monomer on the grafting yield of leather
- Table 2 : Effect of ceric ammonium sulfate on the grafting yield of leather
- Table 3 : Effect of pH of the grafting yield of leather
- Table 4 : Effect of vinyl acetate monomer on the dyeing measurements of grafted and dyed leather with Amecid Floxine 2GN
- Table 5 : Effect of vinyl acetate monomer on the CIE-lab parameters of grafted and dyed leather using Amecid Floxine 2GN
- Table 6 : Effect of ceric ammonium sulfate on the dyeing measurements of grafted and dyed leather with Amecid Floxine 2GN
- Table 7 : Effect of ceric ammonium sulfate on the CIE-lab parameters of grafted and dyed leather with Amecid Floxine 2GN
- Table 8 : Effect of grafting pH on the dyeing measurements and CIE-lab of grafted and dyed leather with Amecid Floxine 2GN
- Table 9 : Comparison between the dyeing measurements of ungrafted and grafted leather dyed with Amecid Floxine 2GN
- Table 10 : Comparison between the CIE-lab parameters of ungrafted and grafted leather dyed with Amecid Floxine 2GN
- Table 11 : Comparison between the dyeing measurements of ungrafted and grafted leather dyed with Remazol Black B
- Table 12 : Comparison between the CIE-lab parameters of ungrafted and grafted leather dyed with Remazol Black B
- Table 13 : Fastness properties of grafted and dyed leather with Amecid Floxine 2GN
- Table 14 : Fastness properties of grafted and dyed leather with Remazol Black BEn ligne : https://drive.google.com/file/d/1hTOPUPKnbiSpdbm-A2I_htEtxI-ziq2j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39615
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 231-235[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Adsorption of dyes from aqueus solution by chromium-containing leather waste / Zhang Mina in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Adsorption of dyes from aqueus solution by chromium-containing leather waste Type de document : texte imprimé Auteurs : Zhang Mina, Auteur ; Bi Shi, Auteur Année de publication : 2004 Article en page(s) : p. 236-241 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Adsorption
Cuir -- Déchets
Cuir -- teneur en chrome
Solutions aqueuses (chimie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The adsorption behaviours were investigated of chromium-containing leather waste towards Acid Flavine G ( Acid Yellow 11; 18820) and Direct Pink 12B (Direct Red 31; 29100) in aqueous solution. The results indicated that both the acid dye and direct dye could be significantly adsorbed by this novel adsorbent. Acid pH values favor the adsorption and the adsorption capacity decreases with the increase of pH. The experimental data of adsorption isotherms of both the dyes fit well to the Langmuir model rather than the Freundlich model. The greatest amounts adsorbed of Acid Flavine G and Direct Pink 12B, at 293K, were 803.4mg/g and 798.7mg/g, respectively when the initial concentration of dye solution was 2000mg/L. The adsorption capacities of the dyes increased further with rising temperature. As the temperature was increased to 323K, the maximum adsorption amounts of Acid Flavine G and Direct Pink 12B reached 980.4mg/g and 1369mg/g respectively, which indicated that the mechanism of the adsorption might be chemical adsorption.
The adsorption kinetics data can be well-described by the pseudo-second-order rate model. The adsorption capacities calculated by the pseudo-second-order rate model were close to those determined by actual measurement (error < 8 %). The column adsorption kinetics studies showed that the breakthrough points of Acid Flavine G and Direct Pink 12B were 30 and 40 bed volumes in the experimental system, which indicated that the adsorption column has a high availability for adsorption of dyes. Desorption studies showed that the Acid Flavine G adsorbed could be completely desorbed by using 0.1mol/L NaHCO3, but complete desorption of Direct Pink 12B was somewhat difficult.Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Influence of pH on adsorption - Adsorption isotherm studies - Adsorption kinetics studies - Column adsorption kinetics studies
- RESULTS AND DISCUSSION : Proper pH value for adsorption - Adsorption isotherms - Adsorption kinetics - Column adsorption kinetics
- Table 1 : Parameters obtained for the Langmuir isotherm model
- Table 2 : Parameters obtained for the Freundlich isotherm
- Table 3 : Adsorption kinetics parameters of dyes on chromium-containing leather absorbent (initial conc. 500mg/L, pH=3)En ligne : https://drive.google.com/file/d/1N6K4jS_TusSEBSnzKLcyE2-JY2hK2n_7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39616
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 236-241[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Auxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 4 / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Auxiliary agents with non-swelling capacity used in pickling-tanning processes - Part 4 Type de document : texte imprimé Auteurs : Agusti Marsal, Auteur ; Ramón Palop, Auteur ; V. Frias, Auteur ; M. D. de Castellar, Auteur ; Pedro J. Celma, Auteur ; Albert M. Manich, Auteur Année de publication : 2004 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents anti-gonflement
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de moutons
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Post-tannage
Résistance à la déchirure
Résistance à la traction
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The reduction in the use of salt in pickling due to the application of different chemicals with non-swelling capacity - polyacrylic acid, naphthol 3-6-disulphonic acid, p-hydroxydiphenyl sulphonic acid and a blend of naphthalene and naphthol sulphonic acids- has been studied in previous papers.1-3 These chemicals were applied in the pickling process either alone or with small amount of salt.
In Part I1, it was confirmed that the blend of naphthalene and naphthol sulphonic acids at an offer of 3% (on pelt weight) and at a salinity of 2°Bé could be a valid alternative since it adequately prevented the swelling of hides. Tanning treatments with conventional chromium salts yielded the correct shrinkage temperatures.
In Part II2 it was observed that the conventional tanning process of hides pickled with sulphuric acid and 3% (on pelt weight) of the blend of naphthalene and naphthol sulphonic acids at a salinity of 2°Bé yielded leathers that could be acceptable as far as physical properties and handle were concerned. However; these leathers showed an irregular stratigraphic distribution of Cr2O3 and a marked colour difference between grain and flesh sides.
Optimization of the tanning process of these hides confirmed that the best results were obtained with a strongly masked chromium salt with a very low basicity.
In Part III3, the possible application of chemicals with non-swelling capacity to reduce the use of salt in the pickling process of sheepskins was studied. In this case, the use of a strongly masked chromium salt with a very low basicity in the tanning process was not necessary since conventional tanning salts were adequate. The best results in terms of non-swelling capacity, shrinkage temperature of the tanned hides, conductivity and Chemical Oxygen Demand of the residual baths were achieved under the following conditions: 2% p-hydroxydiphenyl sulphonic acid (salinity 2°Bé); 2% naphthol 3-6-disulphonic acid (salinity 2°Bé) and 4% polyacrylic acid (salinity 2°Bé).Note de contenu : - AIM OF THE WORK
- EXPERIMENTAL PROCEDURE : Pickle and tannage - Process evaluation
- RESULTS : Swelling of the pickled/tanned skins - Evaluation of the pickling and tanning residual baths - Leather characteristics
- APPENDIX : Chemicals utilized in this work
- Table 1 : Comparative study between pickling processes
- Table 2 : Post-tanning processes
- Table 3 : Thickness variation (%) after pickling/tanning in relation to bating
- Table 4 : Evaluation of the pickling and tanning residual baths
- Table 5 : Leather characteristics as a function of the pickling process
- Table 6 : Tensile strength (IUP 6)
- Table 7 : Tear Resistance (IUP 8)
- Table 8 : Measurement of distension and strength of the grain by the Ball Burst Test (IUP 9)En ligne : https://drive.google.com/file/d/1KGJNb1N6N3BJ-enzwHjtuzRzbeI92kqw/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39617
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004)[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Use of ultrasound in soaking for improved efficiency / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Use of ultrasound in soaking for improved efficiency Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; G. Swaminathan, Auteur ; P. G. Rao, Auteur Année de publication : 2004 Article en page(s) : p. 249-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de trempe -- Analyse
Bains de trempe -- Teneur en chlorure de sodium
Bains de trempe -- Teneur en solides
Cuirs et peaux de chèvres
Déchets -- Elimination
Peaux brutes -- Trempe
Peaux salées
Solides
UltrasonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The length of the soaking process plays a vital role in leather making; prolonged soaking may encourage putrefaction of the skin, thus there is a need to improve the efficiency of the soaking process. Power ultrasound has been employed with the aim of shortening process time.Two types of equipment were used, an ultrasonic cleaner (33 kHz) and an ultrasonic probe (20 kHz) in comparative experiments with static soaking. The efficiency of the soaking process was evaluated in terms of the removal of solids from wet-salted skin - a combination of salt, dirt, blood and soluble protein. We also studied the rate of water uptake of air-dried skins.
The results showed a 44% increase in solids removal by ultrasound in 1 hour soaking of wet salted goat skin. In the case of air-dried skins ultrasound reduced the soaking time by up to 75%. Analysis of the hydroxyproline content in the spent soak liquor indicates that the skin material is not adversely affected by ultrasound in soaking.
Efficiency of the soaking process has been evaluated from the removal of total solids from the wet-salted skin comprising salt, dirt, blood and soluble proteins. The rate of uptake of water in case of air-dried skins during the soaking process has also been studied ; the results show that soaking in the presence of ultrasound could reduce the soaking time by up to 75%.Note de contenu : - EXPERIMENTAL PROCEDURE : Ultrasonic set-up
- MATERIALS AND METHODS : Soaking of salted goat skin - Soaking of air-dried skin (based on air-dried skin weight)
- RESULTS AND DISCUSSION : Soaking of salted goat skin - Hydroxy proline content in spent liquor - Mechanisms for the improvement with ultrasound
- Table 1 : Total solids content in the spent liquor after 1 hour soaking of wetsalted goat skin both with and without ultrasound
- Table 2 : Sodium chloride content in the spent liquor after 1 hour soaking of wet-salted goat skin both with and without ultrasound
- Table 3 : Hydroxy proline analysis of spent soak, (Ultrasonic probe: 80W) at 30°C
- Table 4 : The effect of ultrasound (Ultrasonic probe: 100W) on water uptake in the soaking of air-dried goat skinEn ligne : https://drive.google.com/file/d/1gw-s2geYB2ZtGYH0KL2qhA59Q0FQQvpP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39618
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 249-251[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire A novel pickle-free high exhaust chrome tanning method-an appproach for tota dissolved solids management / Victor John Sundar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : A novel pickle-free high exhaust chrome tanning method-an appproach for tota dissolved solids management Type de document : texte imprimé Auteurs : Victor John Sundar, Auteur ; T. Rangasamy, Auteur ; Venkatasubramanian Sivakumar, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2004 Article en page(s) : p. 252-255 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome trivalent -- Absorption
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 organoleptiques
Déchets -- Réduction
Eaux usées -- Analyse
Tannage au chrome
Température de retrait
Totaux solides dissousLe total des solides dissous (TDS) est une mesure de la teneur combinée dissoute de toutes les substances inorganiques et organiques présentes dans un liquide sous forme moléculaire , ionisée ou microgranulaire (sol colloïdal) en suspension. Les TDS sont souvent mesurés en parties par million (ppm). Le TDS dans l'eau peut être mesuré à l'aide d'un compteur numérique. (Wikipedia)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Serious environmental concerns are being raised with respect to at high Total Dissolved Solids (TDS) contents in spent leather processing liquors. Pickling alone contributes about 35% TDS in the effluents. As cost effective treatments for TDS are not yet available, in-plant control has become a necessity. In the present work, a picklefree chrome tanning method has been coupled with in-situ neutralisation of acid generated during the hydrolysis of chrome salts. The elimination of pickling has given a significant reduction in TDS. Higher uptake and more uniform distribution of chromium in the leather are other benefits of the process. Chemical, physical and microscopical analyses indicate that the leathers’ properties are comparable with those of conventionally processed leathers. It is believed that this new approach could be gainfully employed to overcome the twin concerns of TDS and chromium in the effluent. Note de contenu : - MATERIALS AND METHODS
- PROCESS DETAILS : (All chemical offers are based on the fleshed weight) - Spent liquor analysis - Scanning Electron Microscopic (SEM) examination - Strength properties - Organoleptic properties - Colour value of dyed crust leathers
- RESULTS AND DISCUSSION : Spent tan liquor analysis - Shrinkage temperature and stratigraphic chromium distribution - Scanning Electron Microscopic (SEM) examination - Strength and Organoleptic functional property analysis - Colour value of dyed crust leathers
- Table 1 : Spent tan liquor analysis
- Table 2 : Analysis of wet-blue leathers
- Table 3 : Physical test characteristics of dyed crust leathers
- Table 4 : Organoleptic properties of wet-blue leathers
- Table 5 : Organoleptic properties of dyed crust leathers
- Table 6 : Colour values of dyed crust leather from reflectance measurementsEn ligne : https://drive.google.com/file/d/1QCx2Dhko62huH-NXEDagMdsX0l72qZy6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39619
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 252-255[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Chamois leathers - An approach for accelerated oxidation / Victor John Sundar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Chamois leathers - An approach for accelerated oxidation Type de document : texte imprimé Auteurs : Victor John Sundar, Auteur ; Nagarajan Vedaraman, Auteur ; P. A. Balakrishanan, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2004 Article en page(s) : p. 256-259 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
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux de chèvres
Oxydants
Oxydation
Ozone
Résistance à la déchirureIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Conventional methods of chamois production may lead to delays and inconsistent results. A novel approach has been made to reduce the oxidation time for oil tanned leathers from 10 days to about an hour using ozone as the oxidising agent. Organoleptic property assessment and analyses made in comparison with conventional leathers, supports the viability of the system. The leathers here described as 'chamois' are made from goat skins as is typical in India. Note de contenu : - Processing of chamois leather
- Conventional Method
- Trials with ozone oxidation of oil treated leathers
- Examination of leathers/oils
- Table 1 : Duration of oxidation and drying
- Table 2 : Organoleptic properties of leathers
- Table 3 : Water absorption characteristics of leathers
- Table 4 : Strength characteristics of the leathersEn ligne : https://drive.google.com/file/d/11TZSDZnx2BxTMjZBYR0r8aNYLRT0sbpO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39620
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 256-259[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Oil tan buff leather - Man's first leather ? / Joe Dewhurst in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
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Titre : Oil tan buff leather - Man's first leather ? Type de document : texte imprimé Auteurs : Joe Dewhurst, Auteur Année de publication : 2004 Article en page(s) : p. 260-262 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 -- HistoireIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : It is almost certain that leather was first made as a result of rubbing oils and greases into skins as an attempt to produce a suitable material for clothing. Skins simply hung or stretched out to dry produce a hard material which, if allowed to get wet, will putrefy and disintegrate. Tanning is the process whereby a chemical reaction between the skin protein (collagen) and a tanning agent (in this case certain types of oils) results in a physical change to produce a material that does not putrefy when wetted. i.e. the skin is converted to leather.
Professor Procter in his ‘Principles of Leather Manufacture’ (1922, Chap. 26)1 sums up much of the information produced by other researchers on the subject of oil tannage by saying, ‘In its simplest form it [oil tannage] consists merely in oiling or greasing the wet skin and kneading and stretching it as it slowly loses moisture and absorbs fat. Under these conditions the fibres become coated with a greasy layer, which prevents their adherence after they are once separated by mechanical treatment. At the same time some chemical change takes place in the fibre itself, which has a part in its conversion to leather varying in importance according to the method and fat employed’. It is perhaps two to three hundred thousand years since oil tannage was discovered, its slow evolution using the most suitable kinds of greasy material. At some stage the use of smoke was found to further improve the leather, both softening and making the leather more water resistant.Note de contenu : - Brain tannage
- Chamois tannage
- Liming
- Oil tan buff leatherEn ligne : https://drive.google.com/file/d/1TaR2ih52y7qaz0ijNv0i1ul59D2Ss-N4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39621
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 6 (11-12/2004) . - p. 260-262[article]Exemplaires
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