第二，纤维的后处理：首先将第一步制备初生纤维在50℃的水浴中牵伸30倍

Second, the post-treatment of the fiber: First, the nascent fiber prepared in the first step is drawn 30 times in a water bath at 50°C, and then it is dried and then shaped at 90°C for 4 minutes. The following fiber properties are tested using fibers prepared under these conditions.

Second, the fiber after treatment: first of all, the first step of the preparation of primary fiber in a water bath at 50 degrees C stretched 30 times, and then wait for its drying at 90 degrees C at the shaping 4min. The following fiberperformance tests are taken to take the fibers prepared under this condition.

Second, fiber post-treatment: firstly, the primary fiber prepared in the first step was drawn 30 times in a water bath at 50 ℃, and then it was dried and set at 90 ℃ for 4 min. The properties of the following fibers were tested with the fibers prepared under this condition.<br>