一般情况下，湿法纺丝中为了提高纤维成型过程中的稳定性，采用凝固浴的负拉

In general, in order to improve the stability of the fiber forming process in wet spinning, the negative drawing of the coagulation bath is used. However, during the spinning process of this experiment, it was found that when negative drawing was used, the fiber was not well formed and formed a skin-core structure visible to the naked eye. Therefore, in this experiment, a certain degree of positive drawing was selected to give the fiber a certain degree of purpose. The fiber molecules are arranged in the axial direction to increase the degree of orientation, thereby increasing the strength of the fiber and reducing the deformability, but when the drafting rate is too high, the performance of the fiber will be reduced.

In general, wet spinning in order to improve the stability of the fiber molding process, the use of solidification bath negative stretching. However, in the spinning process of this experiment found that when negative tensile is used, fiber forming is not good, forming a skin core structure visible to the naked eye, so in this experiment to choose to give fiber a certain degree of positive stretching, the purpose is to make the fiber molecules along the axial arrangement, improve its orientation, so as to improve the strength of the fiber, reduce deformation, but when the tensile rate is too high, the performance of the fiber will be reduced.

In general, in order to improve the stability of the fiber in the process of wet spinning, the negative stretching of coagulation bath is used. However, in the spinning process of this experiment, it was found that when negative drawing was used, the fiber forming was not good, and the skin core structure was visible to the naked eye. Therefore, in this experiment, a certain degree of positive stretching was selected to make the fiber molecules arranged along the axial direction, improve its orientation, so as to improve the strength of the fiber and reduce the deformation. However, when the drawing rate is too high, the properties of the fiber are affected It will decrease.<br>