空气变形对玻璃/丙纶混纤纱结构和强度的影响

Influence of Air-texturing on the Structure and Mechanical Property of Glass Fibers/Polypropylene Filament Yarns

在并丝加工中,对不同超喂率及供气压的空气变形加工玻璃纤维G/聚丙烯纤维PP混纤纱的结构进行了对比,并结合强度测量得出：经空气变形后的G/PP混纤纱,两相纤维相互抱合紧密缠结,并有弧圈状变形;整体强度下降,约为丙纶原丝的1/4～3/4,模量下降,断裂伸长有所增加.因此空气变形加工不能达到对这两种纤维力学性能的互补.G/PP的并丝混纤具有分相,纤维排列较为平行,但强度保持较好.

The structure of Glass/Polypropylene （G/PP） filament yarns by using strand and air-texturing technology under such different conditions as overfeed and air-jet pressure is analyzed with microscopy, and its mechanical properties are also tested. The experimental results show that the glass/polypropylene air-texturing filament yarn has a twisted and tangled structure with relatively high deformation. Although the extension at break increases, its strength only accounts for 1/4 -3/4 of the PP filament yarn and the modulus decreases evidently. The strength retention of the G/PP coalesced filaments is high because of its obvious bilateral structure and of parallel alignment of the two component filaments.