Vonnel Acrylic fibres from FISIPE were submitted to textile manufacturing from row material to dyed yarns. Changes on tensile behaviour along the manufacturing process have been monitorised through viscoelastic modelling using the modified Vangheluwe model. Sonic Modulus on yarns has been also measured and differences from raw to dyed acrylic yarns can be seen and they are in accordance with changes in the model parameters.
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Flax fibres from Celitex have been obtained using a conventional line in Spain. Measurements have been made after tearing and carding. The same fibre has been processed in the Technical University of Lodz and measurements have been made also after tearing, carding and cottonized fibre. Values of fineness and length measured using Image analysis, water absorption and thermal behaviour by DSC are reported on this paper. Some relationships are studied.
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