Definition
POY (Partially Oriented Yarn) is a partially drawn synthetic filament yarn produced during the melt spinning process in which the polymer chains within the fiber have not yet reached their final alignment. As a result, the yarn exhibits high residual elongation and low tensile strength, and is classified as an intermediate product for downstream processing steps. POY is manufactured primarily from polyester (PET) and polyamide (PA) and is characterized by a distinctive molecular partial orientation that determines its further processability.
Use in the textile industry
In the textile industry, POY serves primarily as feedstock for draw texturing, in which it is processed into DTY (Draw Textured Yarn) — a bulky, crimped yarn used in knitted and woven fabrics. In addition, POY is drawn into FDY (Fully Drawn Yarn) via the draw-twisting process; FDY is used as a smooth filament yarn for technical textiles and smooth woven fabrics. The low inherent tenacity and pronounced high elongation at break of POY make direct processing without further treatment unsuitable for most textile applications.
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