Polyester FDY (Fully Drawn Yarn): The Standard for Strength and Sheen

1. Introduction

Polyester FDY (Fully Drawn Yarn) is produced through a high-speed spinning process. Unlike DTY (Drawn Textured Yarn), which is textured for bulk, FDY is fully stretched during production. This simultaneous drawing and heat-setting process ensures the yarn reaches its maximum orientation and stability immediately after manufacturing.

2. Composition and Structure

• Material: 100% Polyethylene Terephthalate (PET) Polymer.

• Molecular State: The polymer chains are highly aligned and oriented along the fiber axis.

• Physical Form: The yarn features a smooth, continuous surface with a cross-section that can be round or modified (such as trilobal) to enhance luster.

3. Key Characteristics

• High Tenacity: Due to being fully drawn, FDY possesses excellent breaking strength, making it ideal for high-speed weaving and knitting.

• Low Shrinkage: Superior dimensional stability ensures that fabrics do not significantly deform after washing or heat treatments.

• Versatile Luster: Available in various brightness levels: Semi-Dull (SD), Bright (BR), and Trilobal Bright (TBR) for a diamond-like shine.

• Smooth Surface: Fabrics made from FDY are flat, sleek, and offer an elegant drape.

• Durability: High resistance to wrinkles, quick-drying properties, and stability against common chemicals.

4. Technical Specification Table (Reference)

FDY yarns are available in a wide range of specifications to suit different textile needs:

Virgin / Recycle

Soft package (Virgin/Recycle)

High Stretch Yarn (Virgin/Recycle)

Quick Dry (Virgin/Recycle)​

Virgin / Recycle

+ Semi Dull / Raw White

Soft package (Virgin/Recycle)

+ Semi Dull / Raw White

High Stretch Yarn (Virgin/Recycle)

+ Semi Dull / Raw White

5. Practical Applications Table

Due to its smooth finish and strength, FDY is a primary choice for woven and warp-knitted fabrics: