Preparation method of cellulose blended polylactic acid environment-friendly warm-keeping fiber

The invention provides a preparation method of a cellulose blended polylactic acid environment-friendly warm-keeping fiber, which comprises the following steps: sequentially carrying out melt spinning, hot drawing treatment, curling treatment and stretching treatment on a spinning solution to obtain the environment-friendly warm-keeping fiber, wherein a spinneret plate used for melt spinning is provided with at least four spinneret orifices. The fiber prepared by the preparation method is environment-friendly, has relatively high shape stability, tensile property and thermal insulation property, and can be applied to the field of textile thermal insulation. 本发明提供一种纤维素共混聚乳酸环保保暖纤维的制备方法，所述制备方法包括：将纺丝液依次经过熔融纺丝、热牵伸处理、卷曲处理以及拉伸处理，得到所述环保保暖纤维；其中，所述熔融纺丝使用的喷丝板具有至少4个喷丝孔。所述制备方法制备得到的纤维环保性的同时具有较高的形状稳定性、拉伸性能和保暖性能，可应用于纺织保暖领域。