Age effect on the llama fleece structure and its relationship to fibre textile quality

• Autores: Brodtmann, Lilian Irene
• Año de publicación: 2024
• Idioma: español castellano
• Tipo de recurso: tesis doctoral
• Colaborador/a o director/a de tesis: Frank, Eduardo Narciso
• Fuente: Brodtmann, Lilian Irene ORCID: https://orcid.org/0009-0000-8027-8421 (2024) Age effect on the llama fleece structure and its relationship to fibre textile quality. Universidad Católica de Córdoba [Tesis Doctoral].;
• Materia: SF Cultura de los animales
• Institución: Universidad Católica de Córdoba

The study of the llama fleece structure was carried out to determine if, from the point of view of textile quality, the ageing of the animal modifies unfavourably the fleece structure (micron blowout). Furthermore, the objective of the study aims to verify if a potential loss in textile quality is rectifiable with an industrial dehairing process. Thus, not only fleeces and its fleece structure were analysed but processed fibre lots too, which also form a certain fibre structure. The analysis was realized, on one hand, according to the three fibre groups, which result by implementing the Three-GroupDissection (FG1, FG2 y FG3), and according to the five fibre types, on the other hand, which are determined in principle by its medulla (medulla types A, F, I, C, G). The results showed that the animal ageing reduces the textile quality because the fleece structure is modified unfavourably and that micron blowout regarding the total mean fibre diameter (TMDn) has its origin in all fibre groups and all fibre types, but more so in the fibre type of large medulla (G, lattice), which is contained in the fibre group of the coarse fibres (FG1). In addition, it was confirmed that the processing step of dehairing modifies the fibre structure improving the textile quality and that the modification has its origin mainly in the separation of the coarse fibres out of the fibre lot, which is the main reason for the reduction of the total mean fibre diameter of the dehairing product (TMDnd). Also, it was verified that, although dehairing is an efficient measure in order to improve textile quality, it is not sufficient on its own, but needs of a previous fleece classing regarding fineness. As reason therefore was found that a high-quality dehairing product can be obtained only if the processed fleeces are of relatively reduced TMDn, given that only these contain the desired fine and super fine fibres...
Fil: Brodtmann, Lilian Irene. Universidad Católica de Córdoba. Facultad de Ciencias Agropecuarias; Argentina