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Is 48 hours conditioning prior to testing necessary / A. J. Long in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 1 (01-02/2003)
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Titre : Is 48 hours conditioning prior to testing necessary Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; C. B. Wood, Auteur ; D. A. Langridge, Auteur Année de publication : 2003 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conditionnement
CuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of this work is to determine whether it is feasible to reduce the time required to condition leather prior to physical testing, whilst still ensuring accurate and reliable results.
The method SLP 3 / IUP 31 describing the conditioning of leather was first published as an official method in the Journal of the Society of Leather Technologists and Chemists in 1958.2 (It was previously published for comment in 19493). There has been little change since this date. The latest version does acknowledge that in some cases there is the need for rapid conditioning, although this is not widely used in industry due to the possibility of arbitration which still requires the full 48 hour process (suggesting that the rapid method may not be producing the same results as the standard conditions). The aim therefore is to reduce the time required to carry out some key tests, but not necessarily to remove the requirement for the official standard. It is hoped that alternative options will be devised for those tanneries and test houses where 48 hours effective dead time prior to testing is a significant problem. A separate issue that is under discussion is the use of the different conditions 23oC, 50%RH. Whilst it is acknowledged that there are issues of importance in this area, these have not been considered in this research. The work published here uses the UK standard of 20oC, 65% RH.Note de contenu : - Aims of this work
- Experimental Work and Results : Determination of the significance of conditioning - Evaluation of the optimum duration for conditioning - Evaluation of the moisture xontent of leather - Investigation of accelerated conditioning
- Table 1 : The Effect of conditioning on the tear strength of leather
- Table 2 : Effect of conditioning on water vapour absorption of leather
- Table 3 : Effect of pre-drying on leather conditioningEn ligne : https://drive.google.com/file/d/1ojBnyo0_WPpfRkUXrY-2ixO3stTAxXDO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39807
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 1 (01-02/2003)[article]Measurement of creep relaxation and bagginess indexes of leather / Albert M. Manich in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 4 (07-08/2001)
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Titre : Measurement of creep relaxation and bagginess indexes of leather Type de document : texte imprimé Auteurs : Albert M. Manich, Auteur ; Teresa Bosch, Auteur ; A. J. Long, Auteur Année de publication : 2001 Article en page(s) : p. 133-136 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux
Fluage
Gonflement (physique)
Relaxation des contraintesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Currently there are no available standard methods to measure the "creep" and the "relaxation" of leather. In this paper a new method is proposed which allows determination of both parameters as well as the retained set or "bagginess". The creep and the stress-relaxation phenomena quantify the visco-elastic character of leather and are related to handle and comfort characteristics. Note de contenu : - Description of the method : Evaluation of stress-relaxation - Evaluation of creep
- Experimental : Correlation with handle assessment
- Table 1 : Characteristics of leathers, results of creep and stress-relaxation indexes
- Table 2 : Anaysis of Correlation between the creep and the stress-relaxation indexes and the values of subjective handle given by the expertsEn ligne : https://drive.google.com/file/d/1rufOaCTbrTIz60qArRIcSp-eJhvJYqY_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40244
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 4 (07-08/2001) . - p. 133-136[article]Polymer impregnation and its effect on the rupture properties of leather / A. J. Long in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIII, N° 10 (12/1998)
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Titre : Polymer impregnation and its effect on the rupture properties of leather Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; Geoffrey E. Attenburrow, Auteur ; Anthony D. Covington, Auteur ; R. G. Stosic, Auteur Année de publication : 1998 Article en page(s) : p. 316-327 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This research concerns an investigation into the impregnation of leather with a polyurethane emulsion as a means of strengthening the grain layer and the grain - corium junction. Since three quaters of the leather produced is used for the manufacture of shoes, a possible application of this research could be the development of direct sticking of shoe uppers to soles without the need for thr current abrasion process.
It was hypothesized tha modification of the leather fiber surface properties to more closely match the polyurethane impregnant would result in an increase in leather strength. It was determined experimentally that the polymer was hydrophobic and so the leather was treated with a waterproofing agent to result in surfaces that were more alikeNote de contenu : - MODIFICATION OF THE POLYMER6LEATHER INTERACTION: Introduction - Method - Results
- THE EFFECTS OF THE POLYMER FIBER INTERACTION ON THE LEATHER PEELING STRENGTH: Introduction- Method - Results
- EVALUATION OF LEATHER FIBER PROPERTIES: Introduction - Method - ResultsEn ligne : https://drive.google.com/file/d/1OeyFVpxa2JOJPgFW98XvPouPWsQGiyk7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4494
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIII, N° 10 (12/1998) . - p. 316-327[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006970 - Périodique Bibliothèque principale Documentaires Disponible The use of acoustic emission as an aid to evaluating the handle of leather / A. J. Long in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 5 (09-10/2001)
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Titre : The use of acoustic emission as an aid to evaluating the handle of leather Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; P. Jardine, Auteur ; T. J. Deadman, Auteur ; Albert M. Manich, Auteur ; Teresa Bosch, Auteur Année de publication : 2001 Article en page(s) : p. 159-163 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir
Déchirure (mécanique)
Douceur (toucher)
Emission acoustique
Essais dynamiques
EvaluationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Research has been carried out to evaluate the use of acoustic emission to study leather. Unlike other research the technique reported here describes the measurement of sound in the audible range. Research has been ongoing to evaluate methods to quantify the subjective properties of leather (i.e. the handle of leather) and it has been possible to quantify leather handle using data obtained from physical test methods (it is planned to publish this separately). The work presented in this paper illustrates how the acoustic properties relate to leather handle, and show how the technology can be used to improve the correlation with subjective assessment. This work is subject to a patent application (application number GBOO 16063.0). Note de contenu : - Evaluation of tearing tests using acoustic emission
- The use of acoustic emission to evaluate handle
- Table 1 : Correlation of objective and subjective evaluation of leather handleEn ligne : https://drive.google.com/file/d/1UukCAyN7up0XvpzqGWid_latxiDvkJsP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40229
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 5 (09-10/2001) . - p. 159-163[article]The use of acoustic emission to detect grain crack during the lastometer test / A. J. Long in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 2 (03-04/2001)
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Titre : The use of acoustic emission to detect grain crack during the lastometer test Type de document : texte imprimé Auteurs : A. J. Long, Auteur ; P. Jardine, Auteur ; T. J. Deadman, Auteur Année de publication : 2001 Article en page(s) : p. 80-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir
Détection de dommages (matériaux)
Emission acoustique
Essais dynamiques
Essais dynamiques -- Appareils et matériels
LastomètreIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Research has been carried out to evaluate the use of acoustic emission studies on leather. Unlike other research this technique reported here describes the measurement of sound in the audible range. Using the technique it has been possible to construct a system to detect the grain crack that occurs during the lastometer test. This technology has been patented. Note de contenu : - 1) Apparatus
- 2) Production of an acoustic chamber
- 3) Further noise reduction techniques
- 4) Evaluation of the lastometer testPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40415
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 2 (03-04/2001) . - p. 80-84[article]