How to control the liquor ratio of overflow dyeing machine
May 22, 2022
The bath ratio is the ratio of the dye liquor prepared during dyeing or exhaust dyeing to the mass of the dyed material. When the overflow dyeing machine is used to complete the dyeing operation, the liquor ratio is not blindly adjusted (the smaller the better), but it is necessary to adjust the liquor ratio according to the dyeing process and the type of fabric to be dyed, otherwise it will be difficult to dye the dyeing products that meet the requirements.
The liquor ratio is an important parameter of the process. For light and thin fabrics such as pure polyester, polyester-cotton and spandex, the liquor ratio is usually adjusted to about 1:10. Because of the large volume and relatively long length of light and thin fabrics, especially when the fabric is dense or contains nylon and spandex, it is very easy to form wrinkles, and it usually needs to be pre-shaped by dry heat or wet heat before the dyeing process is complete. Practice has proven that the dyeing temperature of blended interwoven fabrics containing nylon and spandex should be reduced to 120 deg C, and an anti-wrinkle agent should be added. When processing polyester-cotton blended fabrics with a gram weight of about 250g/m2, the liquor ratio can be adjusted from 1:7 to 1:8, depending on the amount of alcohol used.