How to accurately adjust the draw ratio and false twist angle to achieve the best fiber bulk and elasticity?

During the drawing and false twisting process of Polyester DTY, how to accurately adjust the draw ratio and false twist angle to achieve the best fiber bulk and elasticity?

In the drawing and false twisting process of Polyester DTY (draw textured yarn), adjusting the draw ratio and false twist angle are key steps, and they directly affect the bulk and elasticity of the fiber. To achieve the best results, these two parameters need to be precisely controlled. Here are some suggestions:

1. Adjustment of stretch ratio

Understand the properties of raw materials: Polyester fiber raw materials of different specifications have different tensile properties. Before starting to adjust, you should fully understand the tensile properties of the raw materials used, including their maximum stretch ratio, breaking strength, etc.
Initial setting: Set an initial stretch ratio based on experience or test data. This value is usually determined based on fiber specification, purpose, and desired bulk and elasticity.
Gradual adjustment: Based on the initial setting, gradually increase or decrease the stretching ratio and observe the changes in fiber bulk and elasticity. The range of each adjustment should be moderate so that the best value can be accurately judged.
Record and compare: Record the stretch ratio after each adjustment and the corresponding fiber performance data for comparative analysis. Through this method, the relationship between draw ratio and fiber properties can be found to determine the optimal draw ratio.

2. Adjustment of false twist angle

Understand the principle of false twist: False twist causes the fiber to curl and bulk by changing the twist direction and degree of twist. The size of the false twist angle directly affects the curl degree and elasticity of the fiber.
Initial setting: Set an initial false twist angle based on fiber specifications and desired curling degree. This value usually needs to be determined experimentally.
Fine-tuning optimization: Based on the initial settings, by fine-tuning the false twist angle, observe the changes in fiber curl degree and elasticity. When adjusting, attention should be paid to maintaining fiber uniformity and stability.
Combined with draw ratio adjustment: The adjustment of the false twist angle should be combined with the draw ratio adjustment to achieve the best fiber properties. During the adjustment process, attention should be paid to observing the overall effect of the fiber to avoid over-optimization of a single parameter leading to a decline in overall performance.

3. Precautions

Keep the equipment stable: When adjusting the draw ratio and false twist angle, the stability and accuracy of the processing equipment should be ensured to avoid errors caused by equipment problems.
Regular testing and calibration: Regular testing and calibration of processing equipment to ensure the accuracy and reliability of various parameters.
Quality control: During the adjustment process, fiber quality should be strictly controlled to ensure fiber uniformity, stability and compliance with standards.
Through the above steps and precautions, the draw ratio and false twist angle of Polyester DTY can be accurately adjusted to achieve optimal fiber bulking and elasticity. In actual operation, it is also necessary to flexibly adjust and optimize parameter settings according to specific conditions.

Polyester DTY Silver Series ZE0006-ZE0668 121