利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN110565184A 一种高自卷曲性PET/PTT并列复合长丝的制备方法 无效 - 驳回

一种高自卷曲性PET/PTT并列复合长丝的制备方法
摘要：
本发明公开了一种高自卷曲性PET/PTT并列复合长丝的制备方法，将PET和PTT切片干燥结晶后分别熔融通过并列型喷丝板挤出成形，经冷却后上油，再采取1～3级牵伸、热定型处理，牵伸时总牵伸倍率控制在3～3.5倍，其中第一级牵伸倍率为2.8～3.0倍，温度控制在75～80℃。该高自卷曲性PET/PTT并列复合长丝的制备方法采用多级牵伸提高牵伸倍率等方法，达到纤维强度提升，断裂伸长率适度下降，自卷曲性能大幅度改善的效果。
摘要（英）：

The invention discloses a preparing method of a PET/PTT parallel complex filament with high self-crimpiness. PET and PTT are sliced, dried and crystallized, afterwards, the PET and PTT are fused separately and subjected to extrusion molding through a parallel-type spinneret plate, oil is applied after cooling, then level 1-3 drafting and heat setting treatment are adopted, during drafting, the total drafting rate is controlled to be 3-3.5, the level-1 drafting rate is 2.8-3.0, and the temperature is controlled to be 75-80 DEG C. According to the preparing method of the PET/PTT parallel complexfilament with high self-crimpiness, methods like multi-level drafting for increasing the drafting rate are adopted, and the effects of improving the fiber strength, moderately lowering the elongationat break, and greatly improving the self-crimpiness are achieved.

0/0