Polyester fabric steaming machines are widely used in various textile and clothing materials due to their high strength, good resilience, excellent wear resistance, good dimensional stability, and good wrinkle resistance. The dyeing of polyester spool yarn is carried out using the high-temperature and high-pressure dyeing method on high-temperature and high-pressure spool yarn dyeing machines. Since the structure of polyester fibers is compact, disperse dyes almost do not take up color at low temperatures. It is only when the temperature is raised above 90℃ that the dye uptake gradually increases. At temperatures above 110℃, the movement of amorphous polymer chain segments in the polyester fibers intensifies, increasing microspaces and reducing the resistance of dye molecules diffusing into the fiber interior, thus enhancing the rate of dye molecule diffusion. The dye uptake rate of disperse dyes rapidly increases, achieving satisfactory dyeing effects at 130℃. The dye utilization rate reaches above 90%, resulting in rich colors and excellent fastness in various dyeing processes.

Polyester Spun Yarn Dyeing Technology

1.1 Production Materials and Equipment

Polyester 100D yarn, dyes, glacial acetic acid, leveling agents, reducing detergents, antistatic agents, RY-1180V high-temperature and high-pressure dyeing machine

1.2 Process, Conditions, and Formula:

Yarn enters the factory — cone winding — chamfering — caging — dye vat entry — pretreatment (dyeing, scouring, bleaching combined, processed at 100℃ for 20 minutes, soap detergent at 1g/L for oil removal) — water washing — dye vat addition of dissolved dye and auxiliaries, sequentially immersed in dye tank — yarn dyeing (1℃/1min)升温至70℃ even dyeing for 10 minutes — (1℃/1min)升温至100℃ even dyeing for 10 minutes — (1℃/min)升温至130℃ hold for 45-60 minutes — high-temperature draining — water washing — reduction cleaning (100℃ for 30 minutes, for dark colors) — water washing — acetic acid neutralization — water washing (apply antistatic agent) — dehydration — drying.

Dye Formula (per fabric weight):

Disperse Dyes (o.w.f.)

Glacial Acetic Acid 1.2 g/L

Dyeing Agent 1.2 g/L

Restore Cleaning Formula

Glacial Acetic Acid 1.5g/L

Recovering Cleaner 1.5g/L

Antistatic Agent Formula 1.0g/L is widely used in various textiles and fabric materials due to its high strength, good resilience, excellent wear resistance, good dimensional stability, and wrinkle resistance. Polyester spool yarn dyeing is performed using the high-temperature and high-pressure dyeing method on a high-temperature and high-pressure spool yarn dyeing machine. Since the polyester fiber structure is tight, disperse dyes almost do not dye at low temperatures. It is only when the temperature is raised above 90℃ that the dyeing rate gradually increases. At temperatures above 110℃, the movement of amorphous regions of the high polymer chains in the polyester fibers intensifies, increasing micropores and reducing the resistance of dye molecules diffusing into the fiber interior. This improves the diffusion speed of dye molecules, leading to a rapid increase in the dyeing rate of disperse dyes. A satisfactory dyeing effect is achieved at 130℃, with a dye utilization rate of over 90%, resulting in a rich color and excellent fastness properties.

Spun Polyester Yarn Dyeing Technology

1.1 Production Materials and Equipment

Polyester 100D yarn, dyes, glacial acetic acid, leveling agents, reducing detergents, antistatic agents, RY-1180V high-temperature and high-pressure dyeing machine

1.2 Process Flow, Conditions, and Formula:

Raw yarn enters the factory—be wrapped into bobbins—be beveled—be loaded into bobbins—immerse in dye vat—pretreatment (dyeing, scouring, bleaching combined, treated at 100°C for 20 minutes, with 1g/L soap detergent for oil removal)—water wash—add dissolved dye and auxiliaries to the dye vat in sequence—dye the yarn (1°C/1 min), heating to 70°C and even dyeing for 10 minutes—heat to 100°C and even dyeing for 10 minutes—heat to 130°C and maintain for 45-60 minutes—high-temperature drainage—water wash—reduction cleaning (treated at 100°C for 30 minutes, for darker colors)—water wash—acetic acid neutralization—water wash (apply antistatic agent)—dewatering—drying.

Dye Formula (based on fabric weight):

Disperse Dye (o.w.f.)

Glacial Acetic Acid 1.2 g/L

Dyeing Agent 1.2 g/L

Revealing the Cleaning Formula

Glacial Acetic Acid 1.5g/L

Recover Cleaning Agent 1.5g/L

Antistatic Agent Formula: 1.0g/L