| Summary: | 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 106 === In this experiment, a thermoplastic polyester/polyurethane elastic nonwoven fabric was prepared using a two-component melt-blowing technique. Using the Taguchi experimental planning method, the tensile stress, strain, fiber diameter, and dynamic elastic recovery of the nonwoven fabric were recovered as quality characteristics, and the hot air temperature ( Heat air temperature, core-sheath gear pump (GP) speed ratio, Air volume, and Die-to-Collector distance (DCD) are experimental factors, and 3 levels are Taguchi type orthogonal arrays. The L9(34) design experiment was conducted with ANOVA to determine the best parameters for each single quality feature. The results showed that among the four experimental factors, the greatest impact on the four quality attributes was the hot air volume. The confidence interval is used to confirm the design of Taguchi experiment; the principal component analysis method is also used to determine the best parameters for weighing these four quality characteristics. The best parameter combination is hot air temperature 310°C, GP speed (C/S) 10rpm/8rpm. The hot air volume was 11m3, and the DCD was 29cm. Its quality characteristics were MD tensile strength of 0.118 N/g/m2, tensile strain of 261%, fiber diameters of 4.65μm, and dynamic elastic recovery of 73.27%. Finally, the optimal parameters are combined for hot roller processing to discuss the mechanical properties, dynamic elastic recovery, porosity and air permeability of the hot-pressed finished fabrics, and waterproof and moisture permeability properties of the hot-pressed finished fabrics. Tensile strength in the MD direction was 0.168 N/g/m2, strain was 532%, dynamic elastic recovery was 74.45%, also compares the pore size before and after hot pressing, air permeability, waterproof test, and moisture permeability, the pores change from 16.13μm to 8.05μm, the air permeability is 3.5 cm3/cm2/s is reduced to 3.0 cm3/cm2/s, the water resistance test can be increased from 20.97 mbar to 31.68 mbar, and the moisture permeability is reduced from 15412 g/m2*24hr to 14696 g/m2*24hr. Excluding the strain characteristics of contradiction, the principal component analysis method weighs the other three quality characteristics, and calculates the best parameters: hot air temperature 300 ° C, GP rotation speed (C / S) 10 rpm / 6 rpm, air volume 11 m3, DCD 29 cm. The tensile strength of MD was 0.145 N/g/m2, the tensile strain was 213%, the fiber diameter was 4.29μm, and the dynamic elastic recovery rate was 77.41%.
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