Migration of Fibers in Yarns. Part VIII : Experimental Study on a 3-Layer Structure of 19 Filaments

Abstract

A study was made of the migration behavior of filaments in a 3-layer structure of 19 filaments. The filaments were twisted in two distinct forms: (a) ribbon-twisted and (b) cylindrical-twisted. The form of twisting was found to have an appreciable effect on the migration behavior of filaments. The frequency of migration decreases with increase in ribbon width and free length. The experimental results and the observation of yarn formation indicate that, besides the presence of three principal mechanisms, the migration is also caused by the entanglement of filaments. Tensile pro perties of twisted continuous-filament yarns are affected slightly with change in migration behavior.

Keywords

Nylon 66 filaments fibers ribbon-twisted filament yarns cylinder-twisted filament yarns filament yarns yarns. Spacer width free length twisting tension mean fiber position twist factor initial twist twist angle. Mean migration intensity equivalent migration frequency correlogram intensities mechanisms (yarn formation)filament entangle ment tensile properties. Fiber migration. Yarn twister.

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