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VASCONCELOS, F. B. Influence of machine parameters on the physical properties of polyamide/elastane single jersey fabrics. 2012. 138 f. Dissertação (mestrado) Escola de Artes, Ciências e Humanidades, Universidade de São Paulo, São Paulo, 2012. The dynamometric behavior of knits subjected to traction is generally inadequate to meet current standards of comfort and performance and, therefore, elastomeric fibers are increasingly used in combination with cotton, viscose, polyamide and polyester to give to these articles a greater degree of elongation and better elastic recovery. Thus the characteristics of these products are widely associated with elastane yarn. However the relationship between the elastic yarn rate, the loop length and the physical properties obtained in the jersey knit is somewhat poorly studied. The aim of this work is to study and define these relationships using design of experiments in polyamide / elastane single jersey knits. The polyamide feed (LFA) and elastane tension were changed and, after relaxation, measurements of jersey properties were done, such as mass per unit area, width, density, thickness, percentage of elastane, water vapor permeability, elongation and elasticity. It was possible to observe how elastane tension is leading to density and percentage of spandex, while polyamide LFA is predominant in the thickness and elongation, since the width, elasticity and vapor permeability are not influenced by either of the two significant factors

Influência dos parâmetros de regulagem de máquina nas características físicas de malhas de poliamida/elastano