Techniques
Dyeing procedure of disperse dyes
1.High temperature high pressure dyeing
High temperature high pressure dyeing is carried out using a closed type dyeing machines such as chease, beam, jat, jig or liquor flow type according to the form of the material.
General dyeing conditions are as follows:
- About 1-2g/L dispersing agent is added to dyeing liquor and then PH value of the liquor is adjusted to 5-6 with acetic acid or buffer solution (acetic acid and sodium acetate). The dyeing liquor is then gradually raised from 40-60°C to 125-135°C, and in this temperature the dyeing is continued for 30-90 min.
- And also dyeing temperature and dyeing time differ with the form of the material, the dye concentration and dyeing apparatus. Therefore, it is important to select the suitable dyeing condition.
- After dyeing by various methods, reduction cleaning is carried out generally, unfixed dye on the fiber surface is removed by this treatment.
- Color of the dye itself as well as good rubbing and wet fastness are obtained.
- The condition of reduction cleaning is generally as follows:
2g/L Hydrosulphite
3ml/L caustic soda 38°Be
Temperature: 70°C Time: 10-15 min
2. Thermosol dyeing
Thermosol dyeing is a continuous dyeing method which is applied mainly for the polyester/cotton blended materials. General dyeing condition is as follows.
Dye and 0.5-2g/L of migration inhibiter (for example, sodium alginate) and also wetting agent if necessary are added to the padding liquor.
Squeezing is carried out 1dip 1 nip at room temperature, pic up 65-70%. Drying at 70-90_C.
After padding and intermediate drying, therosol fixation is carried out by dry heating for 60-120 sec. at 180- 210°C depending on the form of the material and type of disperse dyes.
- E type: 180-190°C x 60-120 sec
- SE type: 180-200°C x 60-120 sec
- S type: 200-210°C x 60-120 sec
Reduction cleaning as stated in high temperature high pressure dyeing.
NOTE:
All information is provided for guidance and in good faith but without guarantee. Suitability for application and end using requirements remain the users’ responsibility.
1.High temperature high pressure dyeing
High temperature high pressure dyeing is carried out using a closed type dyeing machines such as chease, beam, jat, jig or liquor flow type according to the form of the material.
General dyeing conditions are as follows:
- About 1-2g/L dispersing agent is added to dyeing liquor and then PH value of the liquor is adjusted to 5-6 with acetic acid or buffer solution (acetic acid and sodium acetate). The dyeing liquor is then gradually raised from 40-60°C to 125-135°C, and in this temperature the dyeing is continued for 30-90 min.
- And also dyeing temperature and dyeing time differ with the form of the material, the dye concentration and dyeing apparatus. Therefore, it is important to select the suitable dyeing condition.
- After dyeing by various methods, reduction cleaning is carried out generally, unfixed dye on the fiber surface is removed by this treatment.
- Color of the dye itself as well as good rubbing and wet fastness are obtained.
- The condition of reduction cleaning is generally as follows:
2g/L Hydrosulphite
3ml/L caustic soda 38°Be
Temperature: 70°C Time: 10-15 min
2. Thermosol dyeing
Thermosol dyeing is a continuous dyeing method which is applied mainly for the polyester/cotton blended materials. General dyeing condition is as follows.
Dye and 0.5-2g/L of migration inhibiter (for example, sodium alginate) and also wetting agent if necessary are added to the padding liquor.
Squeezing is carried out 1dip 1 nip at room temperature, pic up 65-70%. Drying at 70-90_C.
After padding and intermediate drying, therosol fixation is carried out by dry heating for 60-120 sec. at 180- 210°C depending on the form of the material and type of disperse dyes.
- E type: 180-190°C x 60-120 sec
- SE type: 180-200°C x 60-120 sec
- S type: 200-210°C x 60-120 sec
Reduction cleaning as stated in high temperature high pressure dyeing.
NOTE:
All information is provided for guidance and in good faith but without guarantee. Suitability for application and end using requirements remain the users’ responsibility.
