FDY stands for Fully Drawn Yarn. It is a type of synthetic fiber, primarily polyester or nylon, which is manufactured through a continuous spinning process where the fibers are drawn fully to their final orientation and crystallinity. FDY is known for its high tenacity and is commonly used in applications where strength and durability are crucial, such as in the production of fabrics for garments, upholstery, and industrial uses.

DTY stands for Drawn Textured Yarn. This type of yarn is produced by texturizing partially oriented yarn (POY) through a process involving heat and mechanical deformation. The texturizing process gives the yarn a crimped, stretchy, and voluminous texture, making it ideal for applications where softness, elasticity, and bulk are important, such as in the production of sportswear, underwear, and home textiles.

   - FDY: Produced through a fully drawn process where fibers are drawn to their final state.

   - DTY: Produced by texturizing partially oriented yarn (POY) to create a crimped texture.

2. Texture and Appearance:

   - FDY: Smooth and uniform in texture, providing a sleek and glossy finish.

   - DTY:Crimped and textured, giving a bulkier and more elastic feel.

3. Applications:

   - FDY: Used in applications requiring high strength and durability, such as in weaving and knitting for garments, upholstery, and industrial and home textiles.

   - DTY: Used in applications requiring softness, stretch, and volume, such as in sportswear, underwear, and home textiles.

4. Elasticity:

   - FDY: Less elastic, maintaining a firm and stable structure.

   - DTY: More elastic, offering stretchability and flexibility.

By understanding these key differences, manufacturers and designers can choose the appropriate type of yarn for their specific needs and applications.