Dyeing formula of polyester yarn

Polyester fabric is widely used in various textiles and clothing fabrics because of its high strength, good resilience, excellent wear resistance, good dimensional stability and good wrinkle resistance. The dyeing of polyester cheese is carried out by high temperature and high pressure dyeing method on a high temperature and high pressure cheese dyeing machine. Due to the compact structure of polyester fiber, disperse dyes are difficult to dye at low temperature. Only when the temperature is raised above 90℃, the dye uptake rate will gradually increase. When the temperature reaches above 1 10℃, the movement of polymer segments in amorphous region in polyester fiber is intensified, which increases micro-gaps, reduces the resistance of dye molecules to diffuse into the fiber, improves the diffusion speed of dye molecules, and makes the dye uptake of disperse dyes increase rapidly. Only at 130℃ can satisfactory dyeing results be obtained. The dye utilization rate is above 90%, the color is full and the dyeing fastness is excellent.

1. Dyeing process of polyester cheese

1. 1 Production materials and equipment

Polyester 100D mesh, dye, glacial acetic acid, leveler, reducing cleaner, antistatic agent, RY- 1 180V high temperature and high pressure dyeing machine.

1.2 process flow, conditions and prescription:

The precursor enters the factory-loosening-chamfering-caging-dyeing vat-pretreatment (desizing, boiling and bleaching, 100℃ for 20min, soaping 1g/L degreasing)-water washing-adding dissolved dyes and auxiliaries to the dyeing vat, invading the dyeing vat in turn-adding yarn for dyeing (1℃/). Raise the temperature to 70℃ for leveling 10 min-(65438+)Min) raise the temperature to 130℃ and keep the temperature for 45-60 min-high temperature drainage-washing water-reductive cleaning (for dark color,100℃ for 30 min)-washing water-use.

Dyeing formula (by fabric weight):

disperse dyes

Glacial acetic acid 1.2g/L

Leveling agent 1.2g/L

Reduction cleaning formula

Glacial acetic acid 1.5g/L

Reduction cleaning agent 1.5g/L

Antistatic agent formula 1.0g/L