Abstract:

In order to improve the drying efficiency of blended fibers in the automatic quantitative chemical analysis system, experiments and theoretical model analysis of drying process were required. The tri-level quadratic orthogonal rotation test of the tri-factor of wool/ acrylic blended fiber was designed, and the influences of three factors, such as dry base quality, drying distance and drying temperature, were discussed. Results indicate that three factors have significant influence on the drying rate, and a rise process, a quick drying and a deceleration process exist on the drying curve obviously. Then, single diffusion model, quadratic polynomial model and Page model were adopted to fit the fiber drying curve, and the mean value of R² of the Page model is 0.995 2, suggesting that it is the best. By the above experiment and model analysis, it is found that the maximum drying time is shorter than 2 h, significantly less than the conventional drying time of 4 h. In addition, the optimum experimental conditions provide the practical basis for improving the efficiency of blended fabrics.

Key words: fiber drying characteristic, far-infrared drying oven, Page model, drying efficiency, quantitative chemical analysis of blended fiber