Titre : |
Collaborative study for the determination of repeatability and reproductibility of the measurement of the water vapour permeability of leather with method ISO 14268 |
Type de document : |
texte imprimé |
Auteurs : |
Giorgio Pozza, Auteur |
Année de publication : |
2016 |
Article en page(s) : |
p. 289-297 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Cuirs et peaux -- Analyse Mesure Perméabilité Vapeur d'eau
|
Index. décimale : |
675 Technologie du cuir et de la fourrure |
Résumé : |
The standard method 1SO 14268 describes a technique for the measurement of water vapour permeability (WVP) of leather which is based on the mass surge of a desiccant contained in a vessel sealed with the specimen under test. The water vapour that seeps inside the container through the leather specimen is absorbed by the desiccant, the mass of which increases proportionally ; fresh water vapour is provided onto the external side by a constant flow of air conditioned at 23°C and 50% relative humidity that is perpendicularly conveyed onto the specimen surface by a rotating fan.
Since the inner side of the vessel is kept dry by the desiccant, the difference of chemical potential between the two facets generates a diffusive force (quantitatively accounted for by the first Fick's law) that drives water vapour across the leather piece in the out-in direction. The mass increase of the desiccant nominally equates the total amount of vapour that has crossed the leather specimen so that the WVP can be calculated by dividing the mass growth of the desiccant by the duration of the measurement (between 7 and 16 hours) and by the exposed area of the specimen.
|
Note de contenu : |
- Design of the precision experiment
- Materials and sampling
- Raw data
- Statistical analysis
- Scrutiny for consistency and outliers : Mandel's statistics - Cochran's test - Grubbs' tests - Final decisions about the consistency of the experimental data
- Functional relationship between precision values and mean level
- Supplementary considerations concerning the trueness of the method and the results |
En ligne : |
https://drive.google.com/file/d/1tSDXouH5NqzF5se05J2JIq00sKn3rsOn/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27664 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 6 (11-12/2016) . - p. 289-297