Drying behavior of low temperature microwave vacuum–dried cashmere fibers and the drying rate at different times were investigated with different microwave powers, vacuum degrees and maximum drying temperatures to specify the optimum drying conditions in consideration of performance and drying efficiency in this study. The results show that higher microwave power can reduce the total drying time and significantly increase the drying rate in the initial stage. The degree of vacuum has a negligible effect on the drying behavior, and the influence of the three factors on effective moisture diffusivity is consistent with the drying behavior. Compared with hot-air-dried fibers, the mechanical properties of low temperature microwave-dried cashmere fibers could be significantly improved. In addition, excessive drying as delayed or overheated treatment will damage the fiber. The Page model is the most appropriate to describe the microwave vacuum drying of cashmere fibers.

中文翻译：

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低温微波干燥羊绒纤维的干燥动力学及力学性能

研究了不同微波功率、真空度和最高干燥温度下低温微波真空干燥羊绒纤维的干燥行为和干燥速率，确定了本研究考虑性能和干燥效率的最佳干燥条件。结果表明，较高的微波功率可以减少总干燥时间，并显着提高初始阶段的干燥速率。真空度对干燥行为的影响可以忽略不计，三个因素对有效水分扩散率的影响与干燥行为一致。与热风干燥纤维相比，低温微波干燥羊绒纤维的力学性能有显着提高。此外，由于延迟或过热处理而过度干燥会损坏纤维。Page 模型最适合描述羊绒纤维的微波真空干燥。