Colored Composite Yarn

In the face of fiber breakage, entanglement and other problems that may occur during the spinning process, what technical measures have colored composite yarn manufacturers taken to reduce the occurrence of these adverse phenomena?

1. Adjust yarn tension
Reason: Too low or disordered yarn tension is one of the main causes of entanglement.
Technical measures: Increase yarn tension or adjust tension distribution to ensure that the yarn maintains a stable tension state during the spinning process, thereby reducing the occurrence of entanglement and breakage.
2. Choose a suitable winding tube
Reason: Some yarns are more sensitive to the material and size of the winding tube, and an inappropriate winding tube will increase the risk of entanglement.
Technical measures: Choose a winding tube material and size suitable for the characteristics of the yarn to reduce the winding rate.
3. Improve yarn adhesion
Reason: Strong surface adhesion of the yarn is also one of the causes of entanglement.
Technical measures: Improve the adhesion of the yarn and reduce entanglement by adding antistatic agents or surface coatings.
4. Improve the flatness of the yarn winding
Reason: Uneven yarn winding will increase the risk of entanglement.
Technical measures: Take measures to ensure that the yarn winding is as flat as possible during the winding process, such as adding adjustment devices, etc., to reduce the occurrence of entanglement.
5. Optimize the spinning process configuration
Technical measures:
In the cotton cleaning process, optimize the beater speed, spacing and other parameters to reduce the production of coarse and hard silk, doubled silk, rubber blocks and super-long fibers.
In the cotton combing process, increase the cylinder-licker-in speed ratio, optimize the cylinder-doffer spacing and other parameters to increase the chemical fiber transfer rate and avoid winding cylinder, doffer and other components.
In the drawing process, use rubber rollers with moderate hardness and treat them with coating or surface carburization to reduce static interference and entanglement problems.
In the spinning process, adjust the parameters such as roving elongation and roving twist coefficient, optimize the back zone roller spacing and drafting multiples to reduce end breakage and entanglement.
6. Strengthen cleaning work
Technical measures:
Regularly clean the spinning equipment, especially key components such as beaters, rollers, cotton flow channels, etc., to reduce the accumulation of impurities and fibers.
Use special cleaning agents and tools for cleaning to ensure that the surface of the equipment is smooth and burr-free, and reduce fiber entanglement and breakage.
7. Temperature and humidity control
Technical measures:
The spinning workshop should maintain appropriate temperature and humidity conditions to reduce the generation of static electricity and fiber breakage.
Under normal circumstances, it is more appropriate to control the temperature below 25°C and the relative humidity at around 65%.
8. Use special additives
Technical measures:
Use an appropriate amount of oil or other special additives during the spinning process to improve the cohesion of the fiber, reduce static interference and adhesion problems.
These additives should have good hygroscopicity and low adhesion to ensure the smooth progress of the spinning process.

During the dyeing process, how can colored composite yarn suppliers ensure the vividness, saturation and durability of yarn colors?

1. Material preparation and selection
Dye selection:
Choose dyes with good quality, easy coloring, high color concentration and color saturation, such as shunsi dyes, roland dyes, etc. These dyes can provide full colors and bright visual effects.
The dyes should have good stability and durability to ensure that the color of the dyed yarn is not easy to fade.
Auxiliary agents and water quality:
Use appropriate dyeing auxiliaries, such as accelerators, fixing agents, etc. to improve the dyeing rate and fixing effect of the dye.
Ensure that the water quality reaches certain indicators to avoid affecting the dyeing effect due to water quality problems.
2. Yarn pretreatment
Cleaning:
Wash the yarn thoroughly with soapy water or detergent to remove stains and impurities on the surface.
For yarns with fishy smell or dirt, it is recommended to carry out a more thorough water washing treatment.
Soaking:
Put the washed yarn in clean water and soak it for half an hour to one hour. This helps the yarn absorb water fully and improve the dyeing effect.
Stain removal:
Use a stain remover to treat the yarn to further remove stubborn stains on the surface and ensure that the dye is better combined with the yarn.
3. Dyeing process control
Dyeing method:
Choose a suitable dyeing method according to the material of the yarn and the desired effect, such as immersion dyeing, boiling dyeing, etc.
Strictly control the dyeing time, temperature and concentration of the dyeing solution to ensure that the dye is evenly dyed on the yarn.
Process optimization:
When dyeing light-colored yarn, it is necessary to ensure uniform dyeing, slow heating speed and shorter insulation time.
When dyeing dark-colored yarn, the heating speed can be faster and the insulation time should be sufficient to ensure that the dye is fully fixed on the yarn.
Dyeing bath ratio and pH value:
Accurately control the dyeing bath ratio and pH value to avoid these factors from having adverse effects on the dyeing effect.
4. Post-dyeing treatment
Rinse:
Rinse the dyed yarn repeatedly with clean water until there is no color stain, remove excess dye and colorant, so as to avoid affecting the color of the yarn.
Color fixation:
Use salt water or other color fixatives to soak the yarn to enhance the fastness and durability of the dyeing.
Drying:
Dry the treated yarn and avoid exposure to sunlight to prevent fading and damage.
V. Quality control and testing
Color difference control:
Strengthen the management of the dyeing process, such as accurate weighing of materials, strict control of process parameters, etc., to reduce the occurrence of color difference.
Use colorimeter and other testing equipment to test the color of the dyed yarn to ensure that the color meets the requirements.
Fastness test:
The dyed yarn is tested for friction fastness, washing fastness, sunlight fastness, etc. to evaluate the durability of the color.