Structure and mechanical properties of polyester DREF-3 yarns produced with different core-wrapper ratios and production speeds

Abstract

The effect of fibre profile, fibre linear density, core content and yarn draw-off speed on structure and mechanical properties or polyester DREF-3 yarns has been studied. It is observed that the trilobal fibres offer no significant benefit in friction spinning with regard to yarn quality. The yarns produced with a thicker core. in general, are significantly stronger, less extensible and yield higher work of rupture and abrasion resistance than the equivalent yarns produced with a thinner core. Higher production speed and fibre denier lead to a marked decline in these characteristics but increase the mean fibre extent and helix diameter. In general, the trilobal fibre yarns exhibit lower values or mean fibre extent, helix angle and helix diameter than those of the circular tibre yarns.