The invention discloses a
dyeing process capable of forming a PTT / PET composite
fiber fabric with a crepe feeling. According to the
dyeing process, an adopted
dyeing agent consists of a dyeing assistant and a dye, and the dye is a
disperse dye. In the dyeing process, a high-temperature and high-pressure
airflow overflow dual-purpose dyeing
machine is adopted for dyeing, and when the temperature ofa dyeing cylinder of the dyeing
machine reaches 45 DEG C, the dyeing assistant and the
disperse dye are separately injected; the dyeing process includes a dyeing stage and a
water washing stage; in the dyeing stage, the dyeing
machine stays in an
airflow mode, and in the
water washing stage, the dyeing machine stays in a gas-liquid mode. During dyeing, the temperature of the dyeing cylinder is increased to 85 DEG C at the temperature increase rate of 0.7 DEG C / min, and the temperature is set as the initial dyeing temperature. On the premise of ensuring the dyeing quality, not only can the dyed fabric have no flaws and defects, but also the fabric can be endowed with a zigzag crepe feeling, so that the fabric has an obvious
airflow style, good color reproducibility and a soft hand feeling;moreover, the fabric has a shape memory function in the weft direction, the elastic effect is obvious, and the requirements for clothing are met.