With a special made spinnerette, hollow pitch fibers were welt and spun, the basic design principals of this spinnerette were discussed in this work.
用自行设计的喷丝板，在单孔纺丝机上纺得了中空沥青纤维，文中讨论了这种喷丝板的设计原理。
2
Elastic polypropylene hollowfibers were obtained from the blend of polypropylene and paraffin oil which was extruded in melt and then cooled in a high stress field (phase separation occurred).
将聚丙烯和石蜡油的混合物熔融挤出，使之在较高的应力场下冷却和相分离，得到了弹性聚丙烯中空纤维。
3
The results showed that the thickness of hollowfibers increased with reaction temperature and reaction time.