Detailed FDY and DTY processes

Everyone who is engaged in the textile industry often sees words such as FDY and DTY in the fabric, and it is difficult for newcomers who are new to the industry to distinguish the difference between the two. FDY and DTY are actually spinning processing methods, not specifically referring to a certain material, mainly used for the production of polyester and other fabrics.

FDY is the abbreviation of Fully drawn yarn. The Chinese name is: full drawn yarn. DTY is the abbreviation of Drawn-texturing yarn, and the Chinese name is: stretch deformed yarn. The difference from FDY is the process of false twisting.

The so-called false twist is that the yarn is twisted in a certain direction during the subsequent processing, and the yarn is still straight when wound. But in a relaxed state, it will shrink and fluff. In the relaxed state, FDY does not shrink.

Here are the production steps of DTY and FDY polyester fiber spinning:

Macromolecular slicing-high temperature becomes molten-various stretching traction-fiber

The difference between DTY and FDY is that the difference in drafting speed when the fibers are bundled results in different processes. There is also a POY. DTY is a deformed yarn belonging to POY. The equipment produces a more curly DTY, so the DTY fabric will be softer and fluffy.

The difference in the drafting speed of the fibers led to the birth of these Ys. The drafting speed of FDY is about twice that of POY, which results in different changes in the molecular structure of FDY and POY after stretching. FDY fibers are more straight. POY is relatively more curved.

So in short, the difference between FDY and DTY in the textile industry is DTY: stretched textured yarn, and the fiber is rolled. FDY: Fully drawn yarn with straight fibers. POY: DTY is a textured yarn belonging to POY. FDY and DTY are caused by the differences in production processes, and different processes correspond to different fabrics.