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Corrected or non-correted grain ? FILK-QMA-1201 - a method to evaluate finished leather / Haiko Schulz in WORLD LEATHER, Vol. 18, N° 2 (04/2005)
[article]
Titre : Corrected or non-correted grain ? FILK-QMA-1201 - a method to evaluate finished leather Type de document : texte imprimé Auteurs : Haiko Schulz, Auteur ; Michael Meyer, Auteur Année de publication : 2005 Article en page(s) : p. 41-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Echantillonnage
Evaluation
Microscopie
Surfaces -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new method is described and illustrated, which enables differentiation between finished leathers that have been corrected or not. The method is very senstive, and can readily detect leathers that have only been lightly corrected, even when the leathers have been slightly snuffed. Note de contenu : - Sample preparation
- Sample evaluation
- Microscopic analysis of the grain
- Microscopic analysis of the back-side of the finish
- Microscopic analysis of the cross-section
- Panel 1 : Definitions
- Fig. 1a : Leather surface after complete removal of the finish layer.
- Fig. 1b : Leather surface after incomplete removal of the finish layer.
- Fig. 2a : Back-side of the finish layer after removal from a corrected grain leather. No fibres remaining in the finish.
- Fig. 2b : Back-side of the finish layer after removal from a corrected grain leather. Fibres left sticking in the finish.
- Fig. 3 : Leather surface of a full grain leather after successful removal of the finish. The arrows indicate the damage-free sickle- shaped pellicles and the fine structure.
- Fig. 4 : Surface of a lightly snuffed leather after removal of the finish. Parallel cut/grind marks are a clear characteristic of correction.
- Fig. 5 : Surface of a buffed leather after removal of the finish. Truncated hair openings are observed as well as grind marks.
- Fig. 6 : Surface of a heavily buffed leather after removal of the finish. Hair openings disappear in a surface with a suede-like effect.
- Fig. 7 : Surface of a crust leather after light abrasion with buffing paper. Fine cut/grind marks can still be clearly observed.
- Fig. 8 : Back-side of a finish from a full grain leather. The mirror image of the typical grain surface is clearly observed as a result of the base coat flowing into the hair follicles.
- Fig. 9 : Back-side of a finish from a leather that was slightly corrected. The cut/grind marks are clearly visible.
- Fig. 10 : Back-side of a finish from a corrected grain leather. The cut/grind marks are clearly visible as well as the impression of leather fibres that remained adhering to the finish.
- Fig. 11 : Back-side of a finish from a leather that was stucccoed and corrected. The leater substrate was digested by enzymatic treatment.
- Fig. 12 : Cross-section of leather that was not corrected. The curvature of the hair openings is completely preserved.
- Fig. 13 : Cross-section of a corrected leather. The curvature of the hair openings has been lost. They appear truncated,ending at the boundary layer in an acute angle. Base coat penetration into fibre network.En ligne : https://drive.google.com/file/d/1UoFYIeR41eUvEfOECWGfc0ZTIU6kuUYu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32338
in WORLD LEATHER > Vol. 18, N° 2 (04/2005) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006182 - Périodique Bibliothèque principale Documentaires Disponible Correlating process parameters with hexavalent chromium level in leather / Dipankar Chaudhuri in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 12 (12/2001)
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Titre : Correlating process parameters with hexavalent chromium level in leather Type de document : texte imprimé Auteurs : Dipankar Chaudhuri, Auteur ; Sanjib Mondal, Auteur Année de publication : 2001 Article en page(s) : p. 461-466 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Three important process parameters, namely, degree of neutralization, intensity of acidification towards the end of fatliquoring, and the degree of exposure to sunlight during drying have been studied to assess their influence on the Cr(VI) level detected in leather. Wet-blue cow-hide pieces have therefore been neutralized to different extent by using sodium bicarbonate, fatliquored, and acidified to different pH values ranging from 3.5 to 7.3, and dried under varying conditions. While some of the leather pieces have been dried in direct sunlight, others have been dried either in diffuse sunlight or in the dark. The Cr(VI) levels in all these leathers have been determined spectrophotometrically. The results clearly indicate that all three parameters studied here strongly influence the Cr(VI) level detected in leather. En ligne : https://drive.google.com/file/d/1B9d64tVAOntZN9ZbXl1Yo-QVGcuIsmJJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4345
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 12 (12/2001) . - p. 461-466[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001569 - Périodique Bibliothèque principale Documentaires Disponible Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
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Titre : Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Chen Xiaoting, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur ; Guo Yizi, Auteur Année de publication : 2023 Article en page(s) : p. 183-185 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux -- Effets de la température
Cuirs et peaux de moutons
PerméabilitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the comprehensive effects of environmental temperature and time on the moisture permeability of natural sheepskin and regenerated leather were compared and analysed by using MATLAB fitting and least square method and their regression equations were constructed respectively.
The microstructure comparison shows that both natural and recycled leathers are composed of protein fibres, which have many hydrophilic groups in their chains, therefore both have good moisture permeability which varies significantly with temperature. The moisture permeability of regenerated leather is slightly weaker than that of natural sheepskin leather. The reason is that latex molecules fill between the collagen fibres, which reduces the gaps through which water vapour can pass, while the papillary layer of natural sheepskin has a tight structure and has a wicking effect that regenerated leather does not.Note de contenu : - Correlation analysis between temperature and time of the moisture permeability of natural sheepskin and regenerated leather
- MicrosimulationEn ligne : https://drive.google.com/file/d/1dECUNRpYQHcHuWQNxz85sR9fAtC5hvN5/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39957
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 5 (09-10/2023) . - p. 183-185[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR / Dongsheng Xin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
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Titre : Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR Type de document : texte imprimé Auteurs : Dongsheng Xin, Auteur ; Yurui Xin, Auteur ; Yinghua Ma, Auteur Année de publication : 2023 Article en page(s) : p. 83-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture
Assemblages collés
Caoutchouc
Composites -- Propriétés mécaniques
Composites -- Propriétés physiques
Cuirs et peaux -- Déchets -- Recyclage
Eclatement (matériaux)
Humidité -- Absorption:Eau -- Absorption
Mouillabilité
Perméabilité
Polychloroprène
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the pearson product moment correlation coefficient analysis method is used to show that the tensile strength of RL/CR is highly positively correlated with the elongation at break, the bursting height is highly positively correlated with the bursting strength, the tensile strength is highly positively correlated with the bursting strength, and the bursting height is negatively correlated with the elongation at break. The air permeability of RL/CR is not correlated with 15 minutes water absorption, but is negatively correlated with 24 hours water absorption and surface wettability ; The 15 minutes water absorption of RL/CR is negatively correlated with the 24 hours water absorption and the surface wettability ; The surface wettability is positively correlated with 24 hours water absorption.
The tensile strength of RL/CR is negatively correlated with air permeability, highly positively correlated with 15 minutes and 24 hours water absorption, and highly negatively correlated with surface wettability. The bursting strength of RL/CR is negatively correlated with air permeability and 15 min water absorption, and highly positively correlated with 24 hours water absorption and surface wettability.Note de contenu : - Introduction to correlation analysis of RL/CR
- Theoretical basis of correlation analysis method
- Experimental design of the orthogonal preparation of RL/CR and determination of its physical and mechanical properties
- Calculation of correlation coefficient of physical and mechanical properties of RL/CR
- Correlation analysis of physical and mechanical properties of RL/CR
- Table 1 : Factors and levels of orthogonal test
- Table 2 : Hot pressing process with orthogonal test
- Table 3 : Mechanical properties of orthogonal test
- Table 4 : Physical performance of orthogonal test
- Table 5 : Correlation analysis of physical and mechanical properties of L5
- Table 6 : Correlation analysis of physical and mechanical properties of L9
- Table 7 : Correlation analysis of physical and mechanical properties of L3
- Table 8 : Correlation analysis of physical and mechanical properties of L5, L9, L3
- Table 9 : Relevance of physical and mechanical properties of RL/CREn ligne : https://drive.google.com/file/d/1Vw7-aw4Zt9ocWQM7WPhmaKQWLEg0gqAG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39577
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 3 (05-06/2023) . - p. 83-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24110 - Périodique Bibliothèque principale Documentaires Disponible Correlation of differential thermal analysis data with the shrinkage temperature of collagen and leather / J. Naghski in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
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Titre : Correlation of differential thermal analysis data with the shrinkage temperature of collagen and leather Type de document : texte imprimé Auteurs : J. Naghski, Auteur ; A. Wisnewski, Auteur ; E. H. Harris, Auteur ; Lee P. Witnauer, Auteur Année de publication : 1966 Article en page(s) : p. 64-74 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Collagène -- Analyse
Statistique
Température de retraitIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Shrinkage temperture data obtained on suspended specimens of raw hide substance and a variety of commercial leathers are compared with values obtained by measuring the thermodynamic changes using differential thermal analysis. In every instance the correlation between the data of these two methods was statistically highly significant, and it is concluded that they measure the same basic phenomenon. It is suggested that the absolute values for the phase transition measured by DTA be used at the reference for the thermal behavior of collagen and its products. Use of suspended specimens offers a simplified procedure, which could be defined as a method for the measurement of shrinkage temperatures. The use of pressurized equipment permitted the extension of the temperature range to include products shrinking above the boiling point of water (100°C). Note de contenu : - Instrumentation
- Sample preparation
- Typical leather-water thermogram
- Table 1 : Data from DTA and suspension shrinkage temperature measurements
- Table 2 : Summary of statistical analysisEn ligne : https://drive.google.com/file/d/1SauL0CaRzgRUUDvVv4mq8YD0ZOlxD3f2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37874
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXI (Année 1966) . - p. 64-74[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008496 - Périodique Archives Documentaires Exclu du prêt Correlation of visual and instrumental color measurements to establish color tolerance using regression analysis / Malathy Jawahar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 12 (12/2015)
PermalinkCosts-effective method for the production of depilation / S. Malathi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 1 (02/1991)
PermalinkPermalinkCountry-level life cycle assessment of carbon footprint in processing of bovine upper leather / Mianhong Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)
PermalinkPermalinkPermalinkPermalinkCovalent fixation of drum dyes on collagen / Gerhard Wolf in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 3 (03/2007)
PermalinkCovalent immobilization of organophosphorus hydrolase onto insoluble bovine collagen fibers / Yanhong Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 6 (06/2014)
PermalinkCr(VI) Formation in double-face sheepskins : Effect of chromium level and ironing / Bahri Basaran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkCr(VI) storage stability for leather / Tom Hogarth in INTERNATIONAL LEATHER MAKER (ILM), N° 52 (03-04/2022)
PermalinkLe Crédit d'Impôt Collection : un crédit d'impôt sur mesure pour la filière cuir / Catherine Dodet in CTC ENTREPRISES, (08/2009)
PermalinkCrédit d'Impôt Métiers d'Art et Label Entreprises du Patrimoine Vivant / Catherine Dodet in CTC ENTREPRISES, (01-02/2010)
PermalinkCritical appraisal of analytical procedures for the determination of CR(VI) in dyed leathers by 1,5 diphenylcarbazide spectrophotometry after sample dilutin or color removal / J. Scancar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 3 (03/2007)
PermalinkCross-linked polymers for aqueous finishing. Binders cross-linked polyaziridine. Part 2 : Behaviour of acrylic binders in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 4 (07-08/2008)
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