Improving the durability and quality of DTY Polyester Filament by improving the spinning process

1. Optimizing the spinning temperature and stretch ratio
Spinning temperature and stretch ratio are key factors affecting the quality of DTY Polyester Filament. The control of spinning temperature directly affects the melting behavior and crystallinity of polyester filaments, thereby affecting the strength, ductility and elasticity of the fiber. Too high or too low spinning temperature will lead to a decrease in the performance of the filaments, and even cause problems such as broken filaments. Reasonable spinning temperature can not only ensure the uniformity of polyester filaments, but also ensure their good physical properties.

Stretch ratio is also a very important parameter. The stretch ratio refers to the degree to which polyester filaments are stretched during the spinning process. Excessive stretch ratios will cause the polyester molecular chains to be overstretched and reduce the strength of the fibers; while too small stretch ratios will cause the fiber structure to be not tight enough, reducing its durability and wear resistance. Properly adjusting the stretch ratio and controlling the orientation of the fibers will help improve the mechanical properties and elasticity of the filaments.

2. Reasonable control of spinning rate
Spinning rate is one of the important parameters affecting the production quality of polyester filaments. If the spinning rate is too fast, the polyester melt will be unstable, resulting in poor fiber uniformity, insufficient strength, and rough surface. If the spinning rate is too slow, it may lead to low production efficiency and increase production costs.

In order to improve the quality of DTY polyester filament, the reasonable control of the spinning rate is crucial. By fine-tuning the spinning process, ensuring that the melt enters the spinneret hole evenly, and controlling the stretching speed, the polyester filament can maintain the best molecular orientation and structural stability during the production process, which not only helps to improve the strength of the fiber, but also effectively improves its durability.

3. Improve the deformation (curling) process
The curl of DTY polyester filament is an important indicator of its elasticity and comfort. During the production process, the adjustment of the deformation process can effectively improve the comfort, elasticity and durability of the filament. Too high or too low curl may affect the performance of the filament and even reduce its service life.

First of all, the reasonable control of the curling speed and curling degree is the key to ensure the high elasticity of polyester filament. Crimping is to deform the polyester filament by applying mechanical force to it. This process plays an important role in improving the elasticity, softness and tear resistance of the fiber. Proper crimping can keep the fiber in high pressure resistance and comfort during use, thereby extending its service life.

Secondly, by improving the design of the crimping machine and using new crimping technology, the crimping effect can be optimized, the uniformity and quality of the filament can be improved, and the broken wire and uneven stretching during the production process can be reduced, thereby improving the durability of the final product.

4. Optimization of heat setting process
Heat setting is an important step in the production of DTY polyester filament. Heat setting can effectively fix the molecular structure of the filament, reduce the deformation of the fiber, and thus improve its strength, elasticity and stability. During the heat setting process, the control of parameters such as heat treatment temperature, speed and pressure of polyester filament is crucial to the quality of the final product.

Optimization of the heat setting process can not only improve the tension resistance and wear resistance of the fiber, but also ensure its stability in different environments and reduce thermal shrinkage or deformation. During the heat setting stage, reasonable process adjustments should be made to ensure that the molecular chain of the filament is well set and effectively improve its durability.

5. Refinement of post-processing process
Although the spinning process is the core that affects the quality of polyester filament, the post-processing process also plays an important role in its final performance. Cleaning process, heat setting, dyeing and finishing processes will have an important impact on the durability and quality of the filament.

Cleaning process: During the production process, polyester filament may be attached with some grease, impurities or other undesirable substances, which will affect its subsequent dyeing and processing effects. By optimizing the cleaning process and ensuring the purity of the filament surface, the dyeing uniformity and anti-fouling performance can be improved.

Heat setting treatment: During the post-processing process, heat setting can fix the shape of the filament, reduce the relaxation and retraction phenomenon during use, and enhance the stability and service life of the fiber.

Dyeing and finishing process: Through refined dyeing and finishing processes, the color fastness, UV resistance and anti-fouling of the filament can be further improved, and its comprehensive performance can be improved.

6. Control the stability of the spinning environment
The changes in temperature and humidity during the spinning process will affect the quality of polyester filaments, and the production environment needs to be kept stable. By using precise temperature and humidity control equipment to ensure the stability of the production environment, the performance fluctuations of polyester filaments caused by environmental changes can be avoided, thereby improving their quality and consistency.