What Are Textile Fabrics Fdy And Dty?

People in the textile industry often see words such as FDY yarn and DTY yarn appearing in fabrics, and it is difficult for newcomers to distinguish the difference between the two. FDY and DTY are actually spinning processing methods, not specific 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: fully drawn yarn, which is a processing method after spinning. DTY is the abbreviation of Drawn-texturing yarn, the Chinese name is: stretch textured yarn. The difference from FDY is that there is an additional false twisting process.

The so-called false twist is that the silk is twisted in a certain direction during the subsequent processing, and the silk is still straight when wound. But in a relaxed state, it shrinks and fluffs up. While FDY is in a relaxed state, there is no contraction.

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

Macromolecular slices - high temperature into molten state - various stretching traction - fibers

The difference between DTY and FDY in detail is that the difference in drawing speed when the fibers are bundled leads to the difference in the process. There is also a kind of POY here. DTY is a kind of textured yarn belonging to POY. equipment, it produces a more curly DTY, so the DTY fabric will be softer and more fluffy.

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

So simply put, the difference between FDY and DTY in the textile industry is DTY: stretch textured yarn, the fiber is rolled. FDY: Fully drawn yarn, the fibers are straight. POY: DTY is a textured yarn belonging to POY. FDY and DTY are produced by process differences in production, and different processes correspond to fabrics with different needs.

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