Titre : |
The influence of first time drying on the characteristics and performance of leathers |
Type de document : |
texte imprimé |
Auteurs : |
Geoffrey E. Attenburrow, Auteur |
Année de publication : |
2005 |
Article en page(s) : |
p. 37-40 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Cuirs et peaux -- Effets de l'humidité Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Séchage Essais dynamiques
|
Index. décimale : |
675 Technologie du cuir et de la fourrure |
Résumé : |
In leather making, the influence of strain within first time drying is very significant. The effects are readily observed in practice, but the rationale is less easy to define. This article present findings from a series of structured investigations into factors that are involved in drying, and how these relate to leather behaviour and characteristics.
As an overview, this article is short on detail, but the conditions of testing and statements made in each section are presented in detail in the original papers. Each section draws from these papers, and references are given accordingly.
In the earlier investigations trials were performed by applying strain on direction (uniaxial) to strip of leathers. In the final studies this changed so that strain could be applied and measured simultaneously in two directions. As retanning filling and softening agents strongly affect the fundamental characteristics of a tannage, all of the investigations were based on wet blue leather samples. |
Note de contenu : |
- The dependence of set on the degree of strain
- The dependence of strain upon stress
- The role of moisture in the relationship between stress and strai
- The role of moisture in the degree of set
- The role of time in the determining the degree of set
- The retention of set
- Characteristics developed during drying in relation to applied strain and set
- The behaviour of collagen fibres during drying
- The effects of the biaxial stretching of leather
- Overview of findings
- Panel 1 : Set plotted against degree of applied strain. Wet blue leather strained parallel to the backbone
- Panel 2 : Initial strain curve for wet blue leather strained parallel to the backbone
- Panel 3 : Stress-strain curves for partially processed leather at different moisture contents. Samples tested parallel to the backbone
- Panel 4 : Set plotted against time after release, sample tested parallel to the backbone
- Panel 5 : Heading : Set plotted against the strain applied during drying of leather strips
- Panel 6 : Stress-strain curves from tensile testing of leather strips dried under an pplied strain (%)
- Panel 7 : The tensile modulus of leather strips dried under strain plotted against their set
- Panel 8 : The biaxial testing apparatus
- Panel 9 : Tensile stiffness at different test angle for leathers dried under different levels of biaxial strain |
En ligne : |
https://drive.google.com/file/d/1QXc-nYg3B1SM6M5uGqVXncEAN1ieQzdl/view?usp=drive [...] |
Format de la ressource électronique : |
pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32469 |
in WORLD LEATHER > Vol. 18, N° 5 (08/2005) . - p. 37-40