| Summary: | 碩士 === 逢甲大學 === 紡織工程學系 === 88 === The study deals with the effects of process parameters on the physical properties of Nylon 6 texturing yarns. The texturing process was processed with a Murata No. 33H Crimp Texturing Machine. The materials used in the study were 86d/34f and 86d/24f Nylon 6 partial oriented yarns (POYs). In order to obtain the optimal yarn quality, the Taguchi methods of was applied for evaluating the effects of twister belt crossover angle (θ), primary heater temperature ( T1 ), yarn speed ( YS ), draw ratio ( DR ) and twisting velocity ratio ( VR ). The physical properties of draw texturing yarns were tested; in addition,the statistical reproducibility of optimize parameters was evaluated for reaching the desired replication.
The experiments were processed with the orthogonal arrays of Taguchi methods. There are three factors of parameter for every experiments. The experimental parameters in the study were twister belt crossover angle ( 100°,105°,110°), primary heater temperature ( 165 ℃, 175 ℃, 185 ℃ ), yarn speed ( 500 m/min ,600 m/min, 700 m/min ), draw ratio ( 1.20 ,1.25 ,1.30 ), and twisting velocity ratio ( 1.35 ,1.45 1.55 ). 27 experiments were carried out in the study and the related physical properties of draw texturing yarns were also tested. The yarn physical properties in testing were tenacity, elongation, crimp rigidity, and boiling water shrinkage.
The optimal parameters for 70d/34f of texturing yarn lies in 105°of twister belt crossover angle, 165 ℃ of primary heater temperature, 600 m/min of yarn speed, 1.20 of draw ratio and 1.55 of twisting velocity ratio, as referred to the experimental results. The related physical properties of 70d/34f texturing yarn were 5.92 g/d of tenacity, 29 % of elongation, 30 % of crimp rigidity and 6.1 % of boiling water shrinkage. The reproducibility under three conditions were reliable and saticfactory. Furthermore, the similar results for 70d/24f texturing yarn were 105°of twister belt crossover angle, 165 ℃ of primary heater temperature, 500 m/min of yarn speed, 1.20 of draw ratio and 1.55 of twisting velocity ratio, as referred to the experimental results. The related physical properties of 70d/34f texturing yarn were 5.32 g/d of tenacity, 27.5 % of elongation, 28 % of crimp rigidity and 7.3 % of boiling water shrinkage.
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