What are FDY and DTY for textile fabrics? FDY and DTY a […]
What are FDY and DTY for textile fabrics? FDY and DTY are actually spinning processing methods. They do not specifically refer to a certain material. They are mainly used for the production of polyester and other fabrics.
FDY is the abbreviation of Fully drawn yarn, which is a processing method after spinning. DTY is the abbreviation of draw texturing yarn, and the Chinese name is: drawn-texturing yarn. The difference from FDY is that it has a false twisting process.
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 become fluffy. In the relaxed state, FDY does not shrink.
Here are the production steps of DTY and FDY polyester fiber spinning:
Macromolecular slices-become molten at high temperature-various stretching traction-fibers
The detailed difference between DTY and FDY is that the different drawing speeds when the fibers are bundled lead to different processes. Here there is also a kind of POY. DTY is a kind of textured yarn belonging to POY. POY undergoes an overfeeding high temperature. The device produces a more curly DTY, so the DTY fabric will be softer and fluffy.
The difference in the drafting speed of the fiber 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. FDY fiber is more straight. POY is relatively more curved.
So simply speaking, the difference between FDY and DTY in the textile industry is DTY: stretched textured yarn, the fiber is rolled. FDY: Fully drawn silk, the fiber is straight.
POY: DTY is a textured yarn belonging to POY. FDY and DTY are produced by the process difference in production, and different processes correspond to fabrics with different needs.