摘要
为研究热气流固结过程中纤维网串珠结构的可控性,采用二次热处理方法,通过调控聚乙烯/聚对苯二甲酸乙二醇酯(PE/PET)皮芯复合纤维处理温度、处理时间、纤维皮芯比制备不同的串珠结构;利用Image Pro Plus图像处理软件分析串珠结构的变化规律。借助X射线衍射仪研究纤维网中串珠纤维的结晶性能,并从结晶动力学角度,采用差式扫描量热法对纤维网中串珠纤维的结晶过程进行跟踪分析。结果表明:皮芯比为50 ∶50的聚乙烯/涤纶皮芯复合纤维在140 ℃、 120 s 的二次热处理条件下可得到不规则参数值接近于1的串珠纤维;随热处理温度升高,串珠纤维结晶度先增加后降低,处理温度为140 ℃时结晶度最大;串珠纤维皮层Avrami指数在1左右,随着结晶温度的增加,串珠纤维结晶速率呈下降趋势。
In order to realize the controllability of bead structures in hot air-through bonded nonwovens, a secondary heating process was adopted. By controlling the processing temperature and processing time as well as the sheath-core ratio of polyethylene/polyester (PE/PET) composite fibers, beads of different structures were prepared. The change rule of the bead structure was analyzed by using Image Pro Plus image processing software. The crystallization properties of the bead fibers in the web were investigated by an X-ray diffractometer. Differential scanning calorimetry was also adopted to trace the crystallization process of bead structures in the web. The results show that the PE/PET bicomponent fibers with a sheath-core ratio of 50 ∶50 can achieve the most rounded (irregular parameter value close to 1) bead structure under the conditions of the secondary heating temperature of 140 ℃ and the reheating time of 120 s. With the increase of temperature, the crystallinity of bead fiber increases first and then decreases. The isothermal crystal kinetics analysis of the Avrami equation shows that the Avrami index is around 1, and as the crystallization temperature increases, the crystallization rate decreases gradually.
作者
周铃
靳向煜
ZHOU Ling;JIN Xiangyu(College of Textiles,Donghua University,Shanghai 201620,China;Key Laboratory of Textile Science & Technology,Ministry of Education,Donghua University,Shanghai 201620,China;Engineering Research Center of Technical Textiles,Donghua University,Shanghai 201620,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2019年第8期27-34,共8页
Journal of Textile Research
基金
“纺织之光”应用基础研究项目(J201703)
