Die an Wollfaser-Bündeln durchgeführte Zugprüfung und die Verwendbarkeit der Ergebnisse für die Qualitätskontrolle

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The book covers a comprehensive analysis of bundle tensile testing on fiber collections, beginning with an introduction and outlining the objectives. It details methods for testing and compares the tensile behavior of bundles versus individual fibers, including the relationship between force-extension curves and the calculation of bundle efficiency. The text explores how results from bundle tests can infer properties of individual fibers, and it examines the tensile strength and elongation relationships between bundles, individual fibers, and yarns based on experimental data. Further sections discuss the influence of testing conditions on measurement values, such as grip length, pre-tension, bundle fineness, width, clamp materials, and pressure. Material-related factors affecting measurement outcomes are also analyzed, including fiber length, diameter, and crimp. The book addresses factors in bundle production and identifies sources of error in comparative tests. It emphasizes improving the reproducibility of bundle tensile testing through a device designed for semi-automatic fiber bundle production, comparing results from manual and machine-made bundles. Finally, the application of bundle tensile testing as a quality control measure in the wool processing industry is highlighted, with specific focus on raw wool, washed wool, and combed wool sectors, concluding with a summary and final thoughts.