THE EFFECT OF DRAWING RATIO AND CROSS-SECTIONAL SHAPES ON THE PROPERTIES OF POLYPROPYLENE CF AND BCF YARNS

Öz

Polypropylene (PP) is a versatile and widely used polyolefin polymer with outstanding properties
such as low density, easy processability, lower cost, low melting point, etc. Properties of the polymer, fiber
cross-section and process parameters have an important influence on the filament yarn properties. In this study,
PP filament yarns as C-shaped and round cross-sectional shapes were produced with five different drawing
ratios by using CF and BCF yarn types. We focused on changes of yarn test results (linear density, tenacitybreaking
elongation, shrinkage in boiling water and the amount of spin finish lubricants) with the effect of
drawing ratios, cross-sectional shapes and yarn types (CF and BCF). The findings from this study make several
contributions to the current literature. We found that drawing ratios, cross-sectional shape and yarn types are
effective on the testing results separately. Furthermore, these differences are statistically significant when their
effects are taken together.

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