In recent years, as fiber production technology has advanced and textile science has progressed, the development and use of high-value, specialized fibers have become a hot topic in the textile industry. Today, we will explore a special type of fiber—Fine Denier Shaped ECDP FDY. This fiber has many unique advantages and a wide range of applications.
1. What is Fine Denier Shaped ECDP FDY?
Fine Denier Shaped ECDP FDY is a fiber made using one-step FDY hot roller spinning equipment. Its cross-section is a perfect triangle. It can be dyed with bright colors using cationic dyes. It also has anti-pilling and moisture-absorbing properties. It can be used to make high-performance fabrics that mimic wool and silk.
2. Production Process
The production process for this fiber includes several steps:
- Crystallization and Drying: The chips must be evenly dried, with moisture content controlled below 24 micrograms per gram.
- Melting and Extrusion: The dried chips are heated and melted.
- Filtering: The melt passes through multiple layers of filters and metal sand.
- Metering and Spinning: The melt is accurately measured and then spun into fibers.
- Cooling and Shaping: The spun fibers are cooled and shaped.
- Oiling and Drawing: The fibers are oiled and then stretched.
- Networking and Winding: Finally, the fibers are wound into rolls.
3. Impact of Spinning Temperature on Fiber Cross-Section
The spinning temperature has a significant impact on the shape of the fiber cross-section. For example:
- At 295°C, the fiber cross-section is nearly round.
- At 290°C, the fiber cross-section starts to form a triangle.
- At 285°C, the fiber cross-section is a perfect triangle with clear edges.
Lowering the spinning temperature helps improve the shape of the fiber.
4. Impact of Drawing Ratio on Spinning State
The drawing ratio affects the fiber’s properties and spinning state. For example:
- When the drawing ratio is 2.52 and the spinning speed is 3800 meters per minute, the spinning state is good.
- When the drawing ratio increases to 2.66 and the spinning speed is 4000 meters per minute, the number of broken ends increases, and fuzzy fibers appear.
Increasing the drawing ratio can improve fiber crystallinity and strength, but a high drawing ratio and spinning speed can cause fibers to break.
5. Impact of Hot Roller Temperature on Fiber Shrinkage
Increasing the hot roller temperature can reduce the fiber’s boiling water shrinkage. For example:
- At 120°C, the boiling water shrinkage is 14.17%.
- At 130°C, the boiling water shrinkage drops to 11.52%.
However, when the temperature rises to 135°C, the spinning stability decreases, and the number of broken ends increases. So, the optimal temperature is 130°C.
Conclusion
By controlling the moisture content of the ECDP chips, selecting the right spinneret and spinning equipment, we successfully produced 83 dtex/72 f Fine Denier Shaped ECDP FDY. It has a breaking strength of 2.93 cN/dtex, an elongation at break of 40.56%, and a dyeing uniformity of 4.5 grades, meeting the requirements for subsequent weaving.
In the spinning process, controlling the temperature at 285°C, the spinning speed at 3800 meters per minute, the drawing ratio at 2.52, and the temperatures of the three hot rollers at 80°C, 112°C, and 130°C, helps produce high-quality, stable ECDP FDY products. Adjusting the GR3 temperature can change the fiber’s boiling water shrinkage and maintain stable production.
With this process, Fine Denier Shaped ECDP FDY will bring more possibilities to the textile industry.