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Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
[article]
Titre : Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. 148-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Poissons
Essais de résilience
Essais dynamiques
Peau -- Histologie
Retannage
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Mechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behaviours of tensile strength, percentage elongation, and tear strength were observed. The tensile strength of the orange-brown leather was higher for the perpendicular direction and lower for cutting in the parallel direction. Regarding stretching, the parallel cut presented the highest value, lower for the dorsal-ventral and ventral-dorsal cuts. As for tear strength, higher values, were observed for the perpendicular and ventral-dorsal cuts. Results showed the influence of skin organisation on leather resistance and the need for method standardisation, elaborating specific norms for the qualitative evaluation of fish leather. Note de contenu : - MATERIAL AND METHODS
- RESULTS AND DISCUSSION : Proximate composition of Tilapia skin - Histological Tilapia skin analysis - Scanning Electron Microscopy (SEM) of Tilapia leather - Qualitative properties of Tilapia leather -
- Table 1 : Technical dagta of reagents used in Tilapia skin tanning process
- Table 2 : Pre-tanning process conditions of Tilapia skin
- Table 3 : Tanning process conditions of Tilapia skin
- Table 4 : Retanning process conditions of Tilapia leather
- Table 5 : Proximate composition of Tilapia skin
- Table 6 : Data on tensile strength, percentage of elongation and tear strength of dark brown Tilapia leather
- Table 7 : Data on tensile strength, percentage of elongation and tear strength of orange-brown Tilapia leatherEn ligne : https://drive.google.com/file/d/1j9G655gXEqUbT4gfDS_f3N6YBWNyVNs7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39689
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 148-157[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24155 - Périodique Bibliothèque principale Documentaires Disponible Influence of the constitution of leather dyes on their dyeing behaviour / Alois Püntener in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
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Titre : Influence of the constitution of leather dyes on their dyeing behaviour Type de document : texte imprimé Auteurs : Alois Püntener, Auteur Année de publication : 1991 Article en page(s) : p. 48-51 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Pure aniline leather and lightly finished semi-aniline leather are finding increasing favour with consumers. Good general use properties and fashionable colours are in demand. Therefore the selection of dyes and the dyeing process itself are becoming more and more important. Dyes with excellent compatibility together with the possibility of computerized colour recipe prediction or even colour matching are making the dyeing process more economical. The relationship between dye constitution and dyeing properties has been studied and the results are presented below. The possibility of synthesizing specific dyes for optimum compatibility has been tested and verified in practice. En ligne : https://drive.google.com/file/d/1y5trkcLBDMKMHV8EFb6n_6KI8PmngBpi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8675
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 75 (Année 1991) . - p. 48-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007138 - Périodique Bibliothèque principale Documentaires Disponible Influence of the fat composition of greasy leathers on their bonding capacity / M. Almela in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)
[article]
Titre : Influence of the fat composition of greasy leathers on their bonding capacity Type de document : texte imprimé Auteurs : M. Almela, Auteur ; Fernando Maldonado, Auteur ; E. Verdù, Auteur ; M. J. Gascon, Auteur ; A. Carter, Auteur Année de publication : 1999 Article en page(s) : p. 32-38 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The manufacture of footwear with greasy leathers can be estimated at about 25% of the total production with bovine leathers present. This type of leather causes problems in upper-sole bonding during footwear manufacturing. Therefore, the objective of this work is to study the composition of the greasy leathers that have previously been selected as particularly problematic for bonding. An attempt is made to determine what factors (distribution and/or type of grease) most negatively influence the adhesion capability of these materials, as well as to look for alterntive ways to modify these factors during manufacturing of the leather. In accordance with the results obtained in the characterization, modifications will be proposed throughout the thickness of the leather, and in terms of the products which must be used.
The experimental controls and procedures used were the followin :
1) Quantitative determination of the greasy extract according to standard ISO 4048
2) Analysis of the greasy extract
. Determination of unsaponifiable fraction (paraffin waxes and mineral oils)
. This layer chromatography (TLC)
. High pressure liquid chromatography (HPLC)
. Gas chromatography-mass spectrometry (GC-MS)
3) Determination of the bonding capacity of the greasy leather according to standards ISO 11644 and BS-5131 Sec. 1.1.2.
Leather that contain extractable greasy matter below 15 % of the dry weight of the material, do not present bonding problems, idependently of the composition of the greasy extract. If the leathers contain more than 15 % of extractable greasy matter they can be problematic for bonding depending on the composition of the greasy extract. Analysis and subsequent tests have shown that wax or mineral oils of high molecular weight are more detrimental for bonding. It is possible to imporove the bonding results of the difficult greasy leathers by modifying the composition of the grease, e.g. replacing paraffin waxes of high molecular weight with others of low molecular weight.
Our main conclusions were :
1) Leathers with greasy extract levels above 15 % can be difficult in bonding.
2) Paraffin waxes and mineral oils with a high molecular weight are the most detrimental components for bonding. BOth products are easy to detect by thin layer chromatography aplied to the extract.
3) Alternative grease products have been proposed.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7855
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Code-barres Cote Support Localisation Section Disponibilité 007023 - Périodique Bibliothèque principale Documentaires Disponible Influence of ultrasound on the adsorption, diffusion and kinetics of leather dyeing process : mechanistic insight / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 7 (07/2020)
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Titre : Influence of ultrasound on the adsorption, diffusion and kinetics of leather dyeing process : mechanistic insight Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur Année de publication : 2020 Article en page(s) : p. 239-247 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants -- Adsorption
Colorants acides
Cuirs et peaux -- Teinture
Diffusion (physique)
Rouge (couleur)
UltrasonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather is a natural porous material, which is composed of a three-dimensional weave of tanned collagen fibre bundles. This paper studies the influence of power ultrasound on the adsorption and kinetics of leather dyeing process. Dyeing experiments have been carried out using ultrasound (150 W, 33 kHz) and compared with that of static control dyeing process. The data of dye uptake in leather have been analysed using Freundlich and Langmuir adsorption isotherms. Intra Particle diffusion model has been employed to calculate Intra particle diffusion rate constant and Boundary Layer effect. Diffusion coefficient (D) of dye through leather matrix has also been calculated. Kinetics of leather dyeing process has been studied through pseudo first and second order rate equation. The Freundlich constant (Kf), Langmuir parameter (Qm), Intra Particle diffusion rate constant (Kd) Apparent Diffusion coefficient (D) and Pseudo First order kinetic constant, K1 have been calculated to be 18.67 mg/g, 50 mg/g, 0.006 min-1, 1.89 * 10-6 cm2/s and 1.7 mg/g min0.5 respectively for ultrasound assisted leather dyeing as compared to that of 0.1 mg/g, 26.67 mg/g, 0.733 min-1, 0.19 * 10-6 cm2/s and 0.003 mg/g min0.5 respectively for control process. The results indicate that significant enhancement in adsorption capacity with more favorable dye adsorption as well as about 10- fold increase in Apparent Diffusion coefficient with significant reduction in boundary layer effect, improved kinetic parameters due to the use of ultrasound in leather dyeing as compared to control. Mechanisms for enhancement in Adsorption and Kinetic Parameters in leather dyeing due to the use of ultrasound have been presented and corroborate well with better dye penetration, color value and fastness properties. Therefore, the present study demonstrates that the use of ultrasound in leather dyeing helps both in adsorption of dyes as well as diffusion process through the leather matrix. Note de contenu : - INTRODUCTION : Novelty of the present work
- EXPERIMENTAL : Ultrasonic experimental set-up - Materials and methods - Analysis of acid red dye
- RESULTS AND DISCUSSIONS : Adoption isotherm - Intra particle diffusion model - Diffusion coefficient in leather dyeing - Kinetic constants in leather dyeing - Mechanisms for enhancement in adsorption and kinetic parameters in leather dyeing due to the use of ultrasoundDOI : https://doi.org/10.34314/jalca.v115i7.3834 En ligne : https://drive.google.com/file/d/1OGWRbzN7QUB-aQY6ZXbm_whWvwnOXx3p/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34325
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Code-barres Cote Support Localisation Section Disponibilité 21879 - Périodique Bibliothèque principale Documentaires Disponible Influence of various waterproofing agents on water and water vapour absorption and permeability / Z. Bajza in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)
[article]
Titre : Influence of various waterproofing agents on water and water vapour absorption and permeability Type de document : texte imprimé Auteurs : Z. Bajza, Auteur ; P. Hitrec, Auteur ; M. Muzic, Auteur Année de publication : 2003 Article en page(s) : p. 144-148 Note générale : Bibliogr. Langues : Anglais (eng) 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.
Cuirs et peaux de bovins
Essais (technologie)
Humidité -- Absorption
Imperméabilisants
Imperméabilisation
Perméabilité
Vapeur d'eauIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this article, the influence on finished leather properties of five different waterproofing agents has been examined. Wet-salted bovine hide (weight category 35 kg) was treated in an half-industrial environment by conventionally used liming, tanning and retanning processes.
9% offers of five different waterproofing agents were used for the waterproofing process. The levels of water vapour, fats, ash and Cr2O3 were determined for the crust leather. The water vapour permeability, leather porosity to water vapour and absorption of water (measured on both the Kubelka apparatus and the Bally penetrometer) were determined. The water repellency properties of each waterproofing agent were estimated from the results.En ligne : https://drive.google.com/file/d/1uB8WAlL7pxLmIPnHSo5luEG48YxHyahc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39770
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 4 (07-08/2003) . - p. 144-148[article]Influences of drying methods on the thermal stability of leather / Ren Bianli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
PermalinkInformations pour l'industrie du cuir / Bayer / Leverkusen [Allemagne] : Bayer (n.d.)
PermalinkInfrared drying : A leather finishing application / S. Jöns in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 3 (03/2006)
PermalinkInhibiting lipolytic haloarchaeal damage on brine cured hide with halocin producer strains / Meral Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 2 (03-04/2007)
PermalinkInhibitory effect of protein filling agent from bovine hair on the oxidation of Cr(III) / Yue Yu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 12 (12/2015)
PermalinkInnovation culture fuels LeFarc's success / Isabella Griffiths in INTERNATIONAL LEATHER MAKER (ILM), N° 43 (09-10/2020)
PermalinkInnovations for the upgrading of automotive leathers / Paul Simpson in WORLD LEATHER, Vol. 18, N° 5 (08/2005)
PermalinkPermalinkInnovative application of dye ligant-attached nanoparticles for bating / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 2 (03-04/2019)
PermalinkInsights into functional polymer-based organic-inorganic nanocomposites as leather finishes / Qianqian Fan in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)
PermalinkInsights into the molecular composition of the skins and hides used in leather manufacture / Rafea Naffa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 1 (01/2019)
PermalinkInstrumental assessment of levelness of dyed materials / Malathy Jawahar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 6 (06/2004)
PermalinkIntegrated pollution prevention and control for tanners within the European Union / Christiane Hauber in WORLD LEATHER, Vol. 15, N° 4 (06-07/2002)
PermalinkL'intendance face aux problèmes d'imperméabilisation du cuir / J.-F. Gournay in TECHNICUIR, N° 8 (10/1973)
PermalinkInteraction of enzymes and hide/leather based on microwave use / Jiacheng Wu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
PermalinkInteractions between surfactant alkyl sulfo-N-succinimidyl esters and collagen fibrils / C. E. Kung in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 1 (01/1993)
PermalinkInteractions : hides & skins, and mechanical forces / Richard Daniels in WORLD LEATHER, Vol. 18, N° 7 (11/2005)
PermalinkInteractions of polyphenols and their derivatives with collagen : a model study of vegetable tannins / G. C. Na in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)
PermalinkInterior leathers : application of leather as a functional and decorative finish / Palanisamy Thanikaivelan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 1 (01/2001)
PermalinkInternational fastness test commission : draft methods IUF 421, IUF 426 and IUF 450 / J. Gauglhofer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
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