Generally, commercial core-spun elastic yarn contains drawn spandex filaments to retain elasticity and tension of the spandex filaments. In this study, core-spun elastic yarn was produced using a self-designed, multi-section drawing frame and a ring spinning frame. Mechanical properties of the yarn at various process conditions were discussed. Results show that the maximum breaking tenacity and elongation of the yarn with the drawn spandex filaments were higher than those of the yarn with the non-drawn spandex filaments. When the pre-drawing ratio of the spandex filaments was 2.0 and the length of the 1 st and 2nd sections on the drawing frame was 30 : 30 cm, the maximum breaking tenacity and elongation of the core-spun elastic yarn were low. When the main drawing ratio of the spandex filaments was either 2.2 or 2.7, the maximum breaking tenacity and elongation of the yarn were higher than those of the yarn at any other main drawing ratio conditions.
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