In order to strictly control the quality of high temperature and high pressure knit fabric dyeing machine dyeing polyester knit fabric, firstly, the grey fabric should be treated with 100% NaOH 3% before dyeing and treated at 130 ° C for 60 min, which is very beneficial to the removal of oligomers to polyester filament fabric. Can reduce "Aurora", improve the pilling phenomenon for medium and short fibers
Pay attention to control the dyeing temperature below 120 °C, and use appropriate carrier dyeing method to reduce the generation of oligomers and obtain the dyeing depth. The high temperature and high pressure knit fabric dyeing machine adds dispersing protective colloidal additives during dyeing, which can produce Leveling effect, which prevents the oligomer from precipitating on the fabric
After dyeing by HTHP knit fabric dyeing machine, the dyeing liquid is quickly discharged from the machine outside the high temperature, and the draining time is up to 5rnin; after dyeing, it is cleaned with reducing agent, 32.5% (380Be) NaOH 3-5mL/L, 70°C for 30min, then Cold wash, hot wash, cold wash, neutralized with acetic acid.
For high temperature and high pressure knit fabric dyeing machines, the bath ratio of high quality quality knitted fabric dyeing should be less than 1:10, and the amount of the fabric should be appropriately reduced. To ensure the running speed of the fabric; in addition, it is necessary to strengthen the management of the production site and stipulate the correct procedures for dyeing and chemical materials.