牦牛绒纤维拉细工艺研究

Research on yakwool fiber tensile technology

研制了一种适用于牦牛绒纤维的改性液，利用拉伸细化技术对改性后纤维进行了处理。确定了拉伸的最佳工艺参数为，拉伸速度20mm/min，罗拉隔距10mm，拉伸率30％，捻度1．67捻，10cm。牦牛绒纤维拉伸细化后，与原毛绒相比，纤维细度可减少2—3μm，变化率约12％，纤维长度可增加3～4mm，变化率约13％。由扫描电子显微镜照片和红外光谱图分析可以看出，拉伸后牦牛绒纤维直径明显变细，分子中二硫键和盐式键被打开，并在新的位置形成新的交联，拉伸细化效果明显。

A kind of modifying agent that fit yakwool was triturated. Slenderizing technology was used to treat yakwool, and the process factor was fixed via experiments： slenderizing velocity 20 mm/min, roller distance 10 mm, slenderizing rate 30%, twist number 1.67 t/10 cm. Compared with untreated yakwool, fiber fineness decreased 2 - 3 μm （change rate was 12% ）, and fiber length increased 3 ~ 4 mm （change rate was 13% ）. From SEM photo and IR spectrum, diameter of yakwool fiber was refined, S - S bend and salt bend were cut off, and formed cross linkage at the new position. Therefore, slenderizing effectiveness was obvious.