What are the differences between polypropylene FDY filament and polypropylene DTY filament?

The differences between polypropylene FDY filament and polypropylene DTY filament are as follows:

Processing technology

Polypropylene FDY filament: It is produced through two processes, namely low-speed spinning and high-speed stretching and winding, on a combined spinning and stretching machine. The fibers have been fully stretched and can be directly used in textile processing.

Polypropylene DTY filament: It is made from POY (pre-oriented filament) as the base filament through continuous or simultaneous stretching and false twisting deformation processing on a single machine.

Physical properties

Fiber morphology: The fibers of polypropylene FDY filament are straight. The fibers of polypropylene DTY filament are curled.

Elasticity and shrinkage: Polypropylene FDY filament usually has relatively low elasticity and shrinkage, due to its straight fibers and stable shape. Polypropylene DTY filament has a certain degree of elasticity and shrinkage. When in a relaxed state, it will shrink and become fluffy.

Gloss: The polypropylene FDY filament has a tight structure, with bright and uniform gloss. Polypropylene DTY filament, due to its curled structure, scatters light and has a relatively soft luster, even with a slightly matte finish.

Fluffiness: The single filaments of polypropylene FDY filament are closely arranged, and the overall texture is fine and crisp. The polypropylene DTY filament has many gaps between its fibers, presenting a fluffy and soft three-dimensional effect.

Application field

Polypropylene FDY filament: It is often used in situations that require a smooth appearance and good breathability, such as weaving silky fabrics, making safety belts, ropes, fishing nets, geotextiles, industrial filter cloths and other industrial textiles, as well as some auxiliary materials for clothing and home textiles.

Polypropylene DTY filament: It is more commonly used in situations that require softness and comfort, such as knitted goods, like sportswear, socks, gloves, etc. It is also used in decorative textiles such as sofa fabrics and curtain fabrics, which can increase the softness and fullness of the fabric.