Abstract
The mechanical properties of hybrid yarns containing elastomeric component are rather difficult to measure. A standard approach to measuring tenacity and elongation cannot be applied to this type of yarn. The main reason is the high elasticity of both elastane and textured filaments. An attempt was made in this study to solve the problem by measuring the mechanical properties of textured filament/elastane hybrid yarns under pretension force which is higher than standard ones. Several pretension forces were applied: 1.5 cN, 4.5 cN, 7.5 cN, 10.5 cN and 13.5 cN. Textured polyamide 6.6 was used as a spirally covering filament, while the core yarn was LYCRA® elastomeric yarn with various linear densities. The results indicated that with an increase in the pretension force, the elongation of the polyamide/ LYCRA® hybrid yarns decreased whereas, the pretension forces had little effect on the tenacity values for investigated samples. These preliminary results are promising, however, the method must be further developed to be ultimately applicable to all complex yarns containing elastomer filament.
Publisher
Union of Engineers and Technicians of Serbia, Belgrade
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