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Investigation of parameters which influence the measurement of leather compressibility / A. J. Long in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 109-111 Titre : Investigation of parameters which influence the measurement of leather compressibility Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; R. G. Stosic, Auteur ; T. Bosch, Auteur ; Albert M. Manich, Auteur Année de publication : 2000 Article en page(s) : p. 109-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Compressibilité Contraintes (mécanique) Cuirs et peaux -- Propriétés mécaniques Essais dynamiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Currently the measurement of leather compressibility can only be evaluated manually using a standard substance gauge. The parameter of leather compressibility will have an important influence on the aesthetic evaluation of the leather. Research was carried out which used a materials tester to compress the leather with a cylindrical probe. Various parameters that could influence the test method were investigated and the test method was optimised. Note de contenu : - Effect of probe size - Effect of applied force - Effect of test speed - Evaluation of test variability En ligne : https://drive.google.com/file/d/11UfIfbBjZVy8ur3PnhB9133mZ9z0rGOO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41230 [article]

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Determination of parameters which influence the measurement of leather's surface friction / A. J. Long in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 112-116 Titre : Determination of parameters which influence the measurement of leather's surface friction Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; R. G. Stosic, Auteur ; T. Bosch, Auteur ; Albert M. Manich, Auteur Année de publication : 2000 Article en page(s) : p. 112-116 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques Essais dynamiques Frottements (mécanique) Mesure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Currently there are no official methods to allow measurement of the surface friction of leather. The parameter of surface friction will have an important influence on the aesthetic evaluation of leather, and so research was undertaken to quantify this parameter. Work has been undertaken to investigate the parameters which influence the measurement of surface friction. A method was developed which used the technique whereby a materials tester is used to pull a sled (around which was fixed the leather) across a reference material. Various parameters that could influence the test method were investigated and as a result, optimisation of the testing procedure was possible. Note de contenu : - Evaluation of parameters thought likely to affect the test - The effect of test direction and sample location within the skin - Test reproducibility and consideration of the dynamic or static coefficient of friction - Correlation with human assessment - Table 1 : Effect of direction and sample location on the coefficient of friction En ligne : https://drive.google.com/file/d/1CPzgCyydGFX-5-tiEBIhxFRgiJl1Kk5V/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41231 [article]

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Measurement and analysis of leather frictional forces / Su Zhenwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 117-121 Titre : Measurement and analysis of leather frictional forces Type de document : texte imprimé Auteurs : Su Zhenwei, Auteur ; Hefin Rowlands, Auteur Année de publication : 2000 Article en page(s) : p. 117-121 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques Evaluation Frottements (mécanique) Mesure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The friction property of leather is very important for the objective measurement of leather’s mechanical performance and subjective evaluation of leather handle. However, due to the visco-elastic and inhomogeneous property of leather and the change of physical properties of leather fibre with temperature, humidity and atmospheric pressure, the measurement and analysis of leather frictional forces are a difficult subject to study. As a preliminary and explorative research work, this paper conducts a literature review on friction theories. The frictional forces of leather samples under a constant load and a constant speed are investigated and measured by a computer system. After initial analysis, pattern recognition techniques using four types of clustering methods are used for the analysis of the relationship between leather surface quality and the measured results. Finally, further research work is suggested. Note de contenu : - Literature review on the relevant theories of friction - Measurement of the frictional force - Characteristics of the curves of leather frictional forces - Pattern recognition of the leather frictional forces - Table 1 : Subjective assessment results - Table 2 : Clustering results by four methods En ligne : https://drive.google.com/file/d/14evA1OY9YbSPbrPmLrY-D-BWnQ7cBgP_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41232 [article]

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A new model for leather quality testing / Su Zhenwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 122-126 Titre : A new model for leather quality testing Type de document : texte imprimé Auteurs : Su Zhenwei, Auteur ; Daizhong Su, Auteur Année de publication : 2000 Article en page(s) : p. 122-126 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contrôle non destructif Cuirs et peaux -- Propriétés mécaniques Essais de résilience Essais dynamiques Evaluation Qualité -- Contrôle Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the recent development of a leather quality test and three existing test models are reviewed, followed by the description of a new test model developed by the authors. The new model can be used to test leather bending and rigidity. Compared with existing test models, the significant advantages of the new model are that it is non-destructive and gives a high correlation with subjective evaluation results ofleather handle. In addition, it is convenient to combine this model with other test models into an integrated test environment to measure compression, testing, bending and surface friction properties of leather. It is simple and can be used on-line. Note de contenu : - A new test model - Case study and comparison : Experiment on leather handle - Experiment on leather’s physical-mechanical properties - Table 1 : Ranking of leather handle by subjective evaluation and test models - Table 2 : Correlation coefficient of the test models with physical properties test En ligne : https://drive.google.com/file/d/17n3XwPnr2fW_X_OqM442Dh6OQtpCX8VE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41233 [article]

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Specimen site and number of skins required to represent selected physical properties of ovine garment leather / S. Lange in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 127-131 Titre : Specimen site and number of skins required to represent selected physical properties of ovine garment leather Type de document : texte imprimé Auteurs : S. Lange, Auteur ; B. E. Niven, Auteur ; R. M. Laing, Auteur Année de publication : 2000 Article en page(s) : p. 127-131 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés physiques Cuirs et peaux de moutons Echantillonnage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Properties critical in the manufacture of garments from textile materials were measured on 158 ovine skins typical of those used in garment manufacture, and the location from which properties of leather most represent those of the whole skin identified. Mass, thickness, compression, bending and extension under low loads (lOOgf/cm) were measured at between four and eight locations either side of the spine, and two directions (0 and 90° to the spine) on each skin. The most representative location was adjacent to the spine and in the middle of the skin, and was similar to but larger than that recommended in existing standard test methods for leather. Approximately 10 skins were required to estimate the properties of a batch of ovine garment leather. Note de contenu : - METHODS : Estimated sample size required for skins with similar variability - Sample size - RESULTS AND DISCUSSION : Identifying the location most representative of properties of a skin : Sample size - Table 1 : Number of skins to be selected for measurement - Table 2 : Identifying the location most representative of properties of a skin - Table 3 : Estimated sample size required for skins with similar variability En ligne : https://drive.google.com/file/d/1ZjPHKkxUg20UeglnnzAgnrk_-gGZjmcO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41234 [article]

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Proposals for changes in estimating the processing properties of anisotropic materials in shoemaking / T. Vilimek in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 132-137 Titre : Proposals for changes in estimating the processing properties of anisotropic materials in shoemaking Type de document : texte imprimé Auteurs : T. Vilimek, Auteur ; F. Langmaier, Auteur Année de publication : 2000 Article en page(s) : p. 132-137 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anisotropie Chaussures Cuir Déformations (mécanique) Essais dynamiques Evaluation Matériaux -- Fissuration Procédés de fabrication Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : - Present day testing practice in shoe making - Methods of evaluating grain cracking : Testing methods with uniaxial stress - Ball distension—IUP 9 - Bally tensometer—IUP 13 - Svit lastometer - Multi-axial deformation according to Uljanickin Platunov - Further methods of measuring multi-axial deformation - Choice of suitable methodology - Description of the proposed evaluation of grain cracking En ligne : https://drive.google.com/file/d/1KO6TJAFdsHhpITNKOdKHVhNN23aXxGl-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41235 [article]

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X-ray photoelectron spectroscopy analysis of mono alkyl phosphate-oriented states in leather surface / K. Sato in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 3 (05-06/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 3 (05-06/2000) . - p. 138-143 Titre : X-ray photoelectron spectroscopy analysis of mono alkyl phosphate-oriented states in leather surface Type de document : texte imprimé Auteurs : K. Sato, Auteur ; Y. Sato, Auteur Année de publication : 2000 Article en page(s) : p. 138-143 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir Hydrophobie Phosphate de monoalkyle Spectroscopie des rayons X Sulfate de monoalkyle Surfaces -- Analyse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather fatliquored with monoakyl phosphate (MAP) possessed an excellent hydrophobicity. In order to elucidate the mechanism of the hydrophobicity due to MAP fatliquoring the binding behaviour and orientation of the MAP molecule (with different alkyl chain lengths) on the surface of chrome leather were examined by X-ray photoelectron spectroscopy (XPS). Differences in the behaviour of MAP and mono alkyl sulphonate (MAS) were also studied by XPS. The interactions of MAP or MAS with the chrome leather are different. MAP combined with the chrome leather with a co-ordination bond and MAS combined chiefly with an ionic bond. The binding strength of MAP varied with the carbon number. The MAP molecule stayed on the fibre surface and a monolayer of MAP molecules was formed. The alkyl chain with C16 or above showed a high condensation force between the side planes and formed a condensed membrane with high density. It can be considered that the hydrophobicity results from the formation of a monolayer of MAP molecules into a condensed membrane. Note de contenu : - EXPERIMENTAL METHODS : Materials - XPS measurement - Angle dependence - EXPERIMENTAL RESULT AND CONSIDERATION : Interaction between MAP and chrome leather - The orientation of MAP in the leather surface - Table 1 : The composition of alkyl phosphate products determined by gas-chromatography En ligne : https://drive.google.com/file/d/1mySolBUcmg7Z0vfMPjmfxesl1HlWtMi9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41236 [article]

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