毛/腈纶混纺织物在远红外烘箱中的干燥特性

Drying properties of wool/acrylic blended fabric in far-infrared oven

为提高混纺织物在定量化学分析自动检测系统中的烘干效率,需要对烘干过程进行试验和理论模型分析。设计了毛/腈纶混纺织物3因素3水平二次正交旋转试验,分别讨论了样品干基质量、烘干距离和烘干温度等3个因素对烘干过程纤维含水率的影响。结果表明,3种因素对毛/腈纶混纺织物烘干速率都有显著影响,且干燥曲线存在明显的升速过程、快速烘干和降速过程。再采用单项扩散模型、二次多项式模型和Page模型对纤维烘干过程曲线进行拟合。结果发现,Page模型的R^2均值达到0.995 2,表明拟合程度最好。通过试验和模型分析发现,最长烘干时间不超过2 h,明显少于传统方法规定的4 h烘干时间。混纺织物烘干存在的最佳试验条件为提高纤维烘干效率提供了参考。

In order to improve the drying efficiency of blended fibers in the automatic quantitative chemical analysis system,experiments and theoretical model analysis on 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 mass,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 process 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 R-2 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 shorter 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.