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Insight into the correlations between fiber dispersion and physical properties of chrome tanned leather / Xiu He in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)
[article]
Titre : Insight into the correlations between fiber dispersion and physical properties of chrome tanned leather Type de document : texte imprimé Auteurs : Xiu He, Auteur ; Wei Ding, Auteur ; Yunhang Zeng, Auteur ; Yue Yu, Auteur ; Jianfei Zhou, Auteur ; Bi Shi, Auteur Année de publication : 2020 Article en page(s) : p. 23-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : 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.
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Douceur (toucher)
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
Perméabilité
Tannage au chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The correlations between fiber dispersion and physical properties of chrome tanned leather were investigated to provide new insights into improving leather quality and designing tanning agents and tannages. Wet blues were prepared by tanning pickled pelts with different amounts of chrome powder, and their pore structures in the range of 5.48 nm-120 pm were measured using a mercury intrusion porosimetry (MIP). The porosity and total pore area of wet blue increased with increasing amount of chrome powder from 2% to 8%. These MIP data combined with the images observed using a field emission scanning electron microscopy and a scanning transmission electron microscopy-energy dispersive spectroscopy indicated that chrome tanning agent opened up the microfibrils, fibrils, elementary fibers and fiber bundles of wet blue. The sufficient fiber dispersion of wet blue was attributed to the fact that chrome tanning agent penetrated into the microfibrils and fixed collagen fibers from microfibril level to fiber bundle level. The wet blues were then fatliquored to prepare crust leathers. The tensile strength, tear strength, elongation at break, softness, fullness and water vapor permeability of the leathers improved with increasing chrome powder. These results implied that there is a positive correlation between fiber dispersion and physical properties of chrome tanned leather. Note de contenu : - EXPERIMENTAL : Materials - Preparation of wet blue and crust leathers - Morphological observation - Measurement of pore structure - Determination of chrome content - Determination of physical properties of crust leather
- RESULTS AND DISCUSSION : Fiber dispersion of wet blue - Fiber dispersion of crust leather - Physical properties of crust leatherEn ligne : https://drive.google.com/file/d/158MUbaEg_JBNZr1geOcn0aVp-SI0MJgy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33394
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 1 (01/2020) . - p. 23-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21484 - Périodique Bibliothèque principale Documentaires Disponible Investigation of high penetration and dispersion of functional nanoparticles in leather / Zhou Ji-Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 9 (09/2023)
[article]
Titre : Investigation of high penetration and dispersion of functional nanoparticles in leather Type de document : texte imprimé Auteurs : Zhou Ji-Bo, Auteur ; Nan Sun, Auteur ; Xue-pin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2023 Article en page(s) : p. 386-395 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Charges (matériaux)
Cuirs et peaux -- Propriétés mécaniques
Matériaux -- Propriétés fonctionnelles
Nanoparticules
Pénétration (physique)
Polyacryliques
RetannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The use of nanoparticle-based functional leather products has stimulated sustainable growth of the conventional leather industry. However, functional nanoparticles (FNPs) face challenges to be well penetrated and dispersed in leather because of their aggregation and mismatch charges with leather. In this study, the acrylic resin (AR) retanning agent, which was originally utilized in leather processing, was applied for the modification of FNPs. It has been demonstrated that AR can improve the electrostatic and steric repulsion among nanoparticles, inhibiting their aggregation and ensuring their penetration and dispersion in leather. Because of the limitation of leather porosity, the maximum loading amount for FNPs was about 40wt% (based on leather weight). The leather got higher results in fullness, thickening ratio, and tensile strength when the loading amount of FNPs was 11.25%. Moreover, the proposed approach in this study can be used well for other types of FNPs loaded in leather, suggesting its broad applicability. Note de contenu : - MATERIALS AND METHODS : Materials - Modification of FNPs - Physicochemical properties of modified FNPs - Penetration of modified FNPs in leather - Effect of different factors on the penetration of FNPs in leather - Influence of FNPs on the mechanical performance of leather
- RESULTS AND DISCUSSION : Basic properties of modified FNPs - Analysis of the dispersibility of modified Gd2O3FNPs in water - Penetration of pristing/modified FNPs in leather - Effect of different factors on the penetration and dispersion of modified FNPs in leather - Influence of modified FNPs on the orgnaoleptic and physical performance of leather
- Table 1 : Retanning processesDOI : https://doi.org/10.34314/jalca.v118i9.8192 En ligne : https://drive.google.com/file/d/10908iVZoLJzZjsvx-zHjmXixuJudFNla/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39829
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 9 (09/2023) . - p. 386-395[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24196 - Périodique Bibliothèque principale Documentaires Disponible Investigation of the effect of argon atmospheric pressure plasma (APP) on the finishing process of garment leathers / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 6 (11-12/2020)
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Titre : Investigation of the effect of argon atmospheric pressure plasma (APP) on the finishing process of garment leathers Type de document : texte imprimé Auteurs : Safiye Meric Acikel, Auteur ; Meruyert Kaygusuz, Auteur ; Ali Serdar Gultek, Auteur ; Ahmet Aslan, Auteur Année de publication : 2020 Article en page(s) : p. 300-306 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Argon
Caractérisation
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Plasma à pression atmosphériqueUn plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère.
Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse.
Résistance aux frottements humides
Solidité de la couleur
Surfaces -- Analyse
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this study the effect of argon atmospheric pressure plasma on the finishing process of garment leathers was investigated. The argon atmospheric pressure plasma (APP) activation was applied to the garment leathers' surfaces for different treatment times (0, 3, 6 and 9 sec/cm2). After argon APP application, the garment leathers were produced by traditional finishing process. The surface properties of the treated leathers were characterised by scanning electron microscopy (SEM). The elemental and chemical composition of the leather surfaces was assessed by XPS (X-ray photoelectron spectroscopy) and FTIR (Fourier Transform Infrared Spectroscopy) analysis, respectively. The surface states of the leathers were evaluated by contact angle measurements and physical properties of the leathers such as tensile strength, elongation at break, double edge tear load, thickness, colour and rubbing fastness were examined. According to the obtained results, it was found that the hydrophilic property of the plasma treated garment leathers is increased. In the physical properties results, a slight increase in tensile strength, tear load and elongation at break were observed being in parallel with the increase in plasma duration. In addition, plasma modification improved the colour and rubbing fastness of the leather alter finishing. The best results were obtained for 9 seconds of argon plasma treatment. It was concluded that non-destructive modification of leather surface leading to better physical and fastness properties could be achieved by appropriate gas selection and sufficient application time. Note de contenu : - MATERIALS AND METHODS : Materials - Experimental set-up - Physical and fastness properties of the treated leathers - Characterisation
- RESULTS AND DISCUSSION : Contact angle results - SEM results - ATR-FTIR results - XPS results - CIE Lab colour fastness resutls - Physical and fatness properties of the treated leathers
- Table 1 : Sample pattern
- Table 2 : Parameters used in the argon APP treatment
- Table 3 : Finishing recipe of leathers
- Table 4 : Element concentrations in the leather samples by XPS, (%)
- Table 5 : CIE Lab results of leathers
- Table 6 : Physical properties of leathers
- Table 7 : Wet-dry rubbing fastness results
- Fig. 1 : Water droplet images on the leather samples and the contact angle results. Numbering refers to exposure times (secs)
- Fig. 2 : SEM images of argon APP treated leathers before finishing
- Fig. 3 : SEM images of argon APP treated leathers after finishingEn ligne : https://drive.google.com/file/d/1ysCBvrkpqYqLkjykMREJd7wVgFr5F7Sb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34911
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 6 (11-12/2020) . - p. 300-306[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22440 - Périodique Bibliothèque principale Documentaires Disponible Laminated cervine leather for apparel / C. M. Bruce in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
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Titre : Laminated cervine leather for apparel Type de document : texte imprimé Auteurs : C. M. Bruce, Auteur ; R. M. Laing, Auteur ; B. E. Niven, Auteur ; D. J. Carr, Auteur Année de publication : 2005 Article en page(s) : p. 1-8 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de cervidés
Plan d'expérience
Relaxation des contraintes
Résistance à la déchirure
Statistique
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The objective of this study was to identify changes in stress-relaxation and tear strength of New Zealand cervine leather after shaving to various thicknesses and then laminating it to an extensible fabric. The load and work required to extend laminated cervine leather (multi-axially) to a specified extension limit was greater and less variable than if lamination had not been carried out. A higher stress-relaxation during cycling was evident with the composite material, although the rate of change was no different to that for non-laminated leather. The difference in work between the initial cycle and subsequent cycles was greater with laminated leather. Reducing the thickness of the leather resulted in a greater deformation height (bagging) and a lower load and work in multiaxial extension, stress-relaxation, tear initiation, and tear strength. Deformation was reduced by laminating the leather only in the case of the thinnest leather. Laminating cervine leather partially reversed the adverse effects of thickness reduction and decreased the differences in stress-relaxation observed amongst the three thicknesses of leather. The textured weft threads of the fabric increased the tearing strength of the composite material in the 0° direction more than in the other directions. The directional properties of the fabric may have a greater effect on garment performance than the location or orientation of the leather as cut from a hide. Note de contenu : - TEST METHODS : Materials - Experimental designs and procedures - Data collection and statistical analysis - Stress-relaxation - Work during stress-relaxation cycling - The rate of change during cycling - Deformation height - Tear strength
- DISCUSSION : Effects of reducing thickness - Laminated cervine leather as a garment material
- Table 1 : Experimental design
- Table 2 : Physical propertiesEn ligne : https://drive.google.com/file/d/1--4_4QCYIdQc2Hx3AqAv8cIwajTnQTO-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39607
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 1 (01-02/2005) . - p. 1-8[article]Leather fatliquor from hide fleshings / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 5 (09-10/2014)
[article]
Titre : Leather fatliquor from hide fleshings Type de document : texte imprimé Auteurs : M. A. Habib, Auteur ; A. G. Alshammari, Auteur Année de publication : 2014 Article en page(s) : p. 199-204 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bisulfite de sodium
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Echarnage
Emulsions
Huiles et graisses
Produit animal
Produits de nourriture du cuir
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The huge amount of fleshings from tanneries around the world creates a negative environmental impact, in addition to disposal costs ; these wastes are not well used. This paper presents some innovative processes for reclaiming the fats carried by a large variety of flesh hides or skin wastes, along with the fatty matter separation and modification to obtain a surface active material intended to be used as leather softening agents.
The fat was extracted with hot water at a fixed temperature (85 +/- 5°C, solid : water 1:1 w/v and 2 hours stirring time). The fat rich phase was then separated and purified with n-hexane (fats : n-hexane 1:8 w/v, ambiant temperature and one hour stirring time). The fat was cooled to 12°C and filtered under pressure to isolate the unsaturated oleic fraction and exclude the stearic fraction. The chemical evaluation of oleic fraction indicated that it was suitable for the production of leather softening (fatliquoring) agent. The product was treated with sodium bisulfite (1,5 mol/kg based on weight of fat, 85°C, 2 hours stirring and continuous air flow). A good quality fatliquoring agent was produced. Application of the fatliquor emulsion on wet-blue leather showed enhanced mechanical properties, tensile strength, elongation and improved appearance. Thereby the waste was transformed into a valuable resource.Note de contenu : - METHODS : Separation of fat from fleshings - Separation of unsaturated oleic fraction from saturated stearic fraction - Analysis of unsaturated oleic fraction - Sulfitation process - Analysis of sulfited fat - Evaluations of fatliquor emulsion - Fatliquoring process - Evaluation of fatliquored leather - Scanning electron microscope
RESULTS AND DISCUSSION : Chemical evaluation of unsaturated fatty matter - Evaluations of fatliquor stability - Characteristics of fatliquored leatherEn ligne : https://drive.google.com/file/d/1zLV6QB-SAddcE_Eu93_d_uppib5fTtfI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22209
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 5 (09-10/2014) . - p. 199-204[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16629 - Périodique Bibliothèque principale Documentaires Disponible 16621 - Périodique Bibliothèque principale Documentaires Disponible Leather finishing : Preparation and application of cationic organosilicone/polyurethane micro-emulsion / Shen Yiding in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 3 (05-06/2007)
PermalinkLeather property : looseness / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 37 (09-10/2019)
PermalinkLeather stability in alternate climate conditions / Michaela Schröpfer in LEATHER INTERNATIONAL, Vol. 215, N° 4828 (03/2013)
PermalinkLeather surface refinement with application of the TIO2-SIO2-GLYMO Nanocomposite and lacquer coating / Meruyert Kaygusuz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
PermalinkLimiting microbial activity as an alternative approach of bovine hide preservation part II : impact of developed formulations on leather quality and the environment / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 2 (02/2020)
PermalinkLocational differences in the physical properties of sole leather / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
PermalinkLocational differences in the physical properties of sole leather / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 3 (05-06/1976)
PermalinkLocational differences in the physical properties of upper leather / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
PermalinkLocational differences in the physical properties of upper leather / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 3 (05-06/1976)
PermalinkManufacture of exotic leather and small leather goods from ovine stomach / Peris N. Wainaina in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 5 (05/2022)
PermalinkMapping tear, strength and collagen fibril orientation in bovine, ovine and cervine hides and skins / S. J. Kelly in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 1 (01/2018)
PermalinkMeasurement and correlation of drape coefficient and related mechanical properties of cow nappa apparel leathers / K. Krishnaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 5 (09-10/2010)
PermalinkMechanical microscopic analysis in the process of stretching cowskin collagen / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 1 (01-02/2023)
PermalinkMechanical properties of leather from crossbreed kid from white goats upgraded by bucks of boer and nubian breeds / Piotr Zapletal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 2 (03-04/2012)
PermalinkMechanical properties of sheep nappa leather influencing drape / K. Krishnaraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 7 (07/2008)
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