[article]
| Titre : |
A simple approach to leather process investigation part 3 - The development of the modified standard process for side leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Ibrahim Elrufai abuelhassan, Auteur ; Alan Gordon Ward, Auteur ; S. Wolstenholme, Auteur |
| Année de publication : |
1984 |
| Article en page(s) : |
p. 125-138 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux
Essais (technologie)
Procédés de fabrication
Statistique
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
A standard process for the production of segments of chrome side leather, in a controlled manner, has been reported in T. Soc. Leather Technol. Chem., (1974), 58, 88. This process has been further developed to give a modified standard process in which the three main changes are (I) the use of whole sides in place of segments, (II) a drum liming procedure to replace the circulatory system employed previously for liming stationary segments, and (III) the transfer of the operation of splitting from the stage after liming to after chrome tanning. The course of development of the modified standard process is described, including details of consequential changes to deliming, pickling, tanning, basifying and neutralisation. It was also necessary to modify drying and conditioning, to enable whole sides to be handled.
The properties of leather made by the modified process have been compared with those of standard process leathers. Although minor differences can be detected between the subjective properties (break, temper and grain quality) of leathers made by the two processes and also between a minority of the physical properties measured at corresponding locations on a side or segment, the similarities are sufficient to regard the new process as a near equivalent of the original process. Leathers made by the modified standard process on different occasions have highly reproducible properties and so the process is suitable for the study of the effect of variants in the leather-making operations on properties of the final leather. |
| Note de contenu : |
- DEVELOPMENT OF THE MSP FOR WHOLE SIDES : Raw material - Siding - Brining, soaking and liming - Defining, pickling and tanning - Washing and neutralisation - Drying - Conditioning - Operation of the temperature and pH controlled drum - Machine operations
- THE MODIFIED STANDARD PROCESS : Farm environment - Slaughterhouse procedure - Siding - Washing - Green fleshing - Brining - Brine pile - Soaking - Liming - Lime fleshing - Hair and scud removal - White liming - Washing - Deliming - Flushing - Bating - Flushing - Pickling and tannage - Chrome pile - Samming - Chrome splitting - Shaving - Washing - Neutralisation - Flushing - Dyeing - Flushing - Fatliquoring - Fatliquor pile - Samming and setting - Conditioning - Toggling - Storage - Process control
- TEST METHOD DETAILS : Weight and area measurements - Sample squares for subjective and physical tests - Subjective and objective physical testing - Chemicsal tests
- STATISTICAL ANALYSES AND EXPERIMENTAL PLANNING : The sign test for the paired case - Mann-Whitney test - Wilcoxon test - The Kruskall-Wallis test
- PROCEDURES FOR PREPARING PACKS 1-4 : Pack 1. Check of SP operations - Pack 2. Introduction of drum liming and chrome splitting variants - Pack 3. Comparison of SP and MSP for whole sides - Pack 4 : The standard pack
- EXPERIMENTAL RESULTS AND DISCUSSION : Reproducibility of the standard process for segments - Effect of the drum liming and chrome splitting variants (for segments) - The change to processing whole sides (pack 3) - The standard pack of MSP leather (pack 4)
- Fig. 1 : Location of segment required for the standard process of laight and of the area of the 20 squares available for test samples from modified standard process leather, within the side used for the modified standard process
- Fig. 2 : Squares within the area of the side used for test purposes, together with the arrangement and orientation of samples within the 12 squares usef for lastometer and Instron testing |
| En ligne : |
https://drive.google.com/file/d/19qG8HFhp0_MD1IyHdLXox-NwG0mvfEX2/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34149 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 68 (Année 1984) . - p. 125-138
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A simple approach to leather process investigation part 3 - The development of the modified standard process for side leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 68 (Année 1984)
