Introduction of Jigger Dyeing Process

Introduction of Jigger Dyeing Process

As a common dyeing equipment, the AT276 jigger dyeing machine is widely used in the dyeing process of fabrics. It occupies an important position in the textile printing and dyeing industry due to its advantages such as easy operation, wide application, flexible processing methods and uniform dyeing.

1. Basic Principle and Structure of Jigger Dyeing Machine

Jigger Dyeing Machine is an intermittent dyeing equipment, mainly used for dyeing various fabrics (such as cotton, polyester, nylon, etc.). Its basic principle is to achieve uniform dyeing by winding the fabric on the dye shaft and repeatedly padding and winding the fabric in the dye tank.

The basic structure of the jigger dyeing machine includes: dye tank, dye shaft, cloth guide roller, drive device, liquid level control system, temperature control system, etc. The dye tank is used to hold the dye, the dye shaft is used to wind the fabric, the cloth guide roller is used to guide the fabric movement, the drive device provides power, and the liquid level control system and temperature control system are used to control the liquid level and temperature of the dye respectively.

2. Application process of jigger dyeing machine

a. Fabric preparation Before jigger dyeing, the fabric needs to undergo pre-treatment processes (such as desizing, scouring, bleaching, etc.) to remove impurities and slurry on the fabric surface and improve the uniformity and color fastness of dyeing. At the same time, the fabric needs to be rolled to ensure that its surface is smooth and flat to prevent creases and stains during the dyeing process.

b. Preparation of dye solution According to the material and dyeing requirements of the fabric, select suitable dyes and auxiliaries (such as penetrants, leveling agents, etc.) and prepare the dye solution in a certain proportion. The concentration of the dye solution should be adjusted according to the color absorption performance of the fabric, the dyeing power of the dye, and the depth of dyeing. At the same time, the pH value of the dye solution also needs to be precisely controlled, generally between 4.5-6.5, to ensure that the dye can fully exert its dyeing performance.

c. Setting of jigger dyeing process parameters The key parameters of the jigger dyeing process include: dye solution temperature, dyeing time, fabric travel speed, fabric tension, etc. Normally, the temperature of the dye liquor needs to be set according to the characteristics of the dye. For example, the dyeing temperature of reactive dyes is generally 60-90℃, and that of disperse dyes is 120-130℃. The dyeing time needs to be adjusted according to the dyeing depth and the dye uptake rate, which is generally 30-60 minutes.

d. Roller dyeing process During the roller dyeing operation, the fabric needs to be evenly wound on the dye shaft and ensure that the winding is moderately tight. Start the roller dyeing machine to reciprocate the fabric in the dye tank, and control the immersion time and movement speed of the fabric in the dye liquor by adjusting the angle of the guide roller and the speed of the drive device. At the same time, monitor the temperature and level of the dye liquor in real time to ensure the uniformity of the dye liquor and the stability of dyeing.

e. Washing and post-treatment after dyeing After dyeing, the fabric needs to be fully washed to remove unfixed dyes and auxiliaries to prevent the color fastness from decreasing. The washing temperature and time should be adjusted according to the type of dye and the characteristics of the fabric. Generally, it is washed with hot water 3-5 times, and then washed with cold water. In order to further improve the color fastness and feel of the fabric, softening treatment or other finishing processes can be added.

f. Uniformity control During the jig dyeing process, the tension of the fabric should be kept uniform to prevent uneven dyeing and fabric deformation. Especially during the winding process, fabric folding or overlapping should be avoided to avoid dyeing spots or stripes.

g. Stability of dye liquor During the dyeing process, attention should be paid to the changes in the temperature, pH value and concentration of the dye liquor, and regular inspections and adjustments should be made to ensure the stability of the dyeing effect. The temperature of the dye liquor should be slowly heated up and kept at a constant temperature to avoid excessive temperature fluctuations that affect the dyeing of the dye.

h. Maintenance of equipment The various components of the jigger, such as the dye shaft, guide roller, drive device, etc., should be regularly inspected and maintained to ensure their normal operation. The dye tank should be cleaned in time to prevent dye precipitation and residual auxiliaries from affecting the dyeing effect.

As an efficient dyeing equipment, this AT276 jigger dyeing machine from Anytester has important application value in fabric dyeing processing. By reasonably selecting dyes, accurately controlling process parameters and strictly operating specifications, uniform dyeing and high-quality dyeing effects of fabrics can be achieved. Take polyester and cotton blended fabrics as an example. The jigger performs well in processing this fabric. Disperse dyes are used for polyester fiber dyeing, while reactive dyes are used for cotton fiber. By adjusting the process parameters of the jigger, the two fibers can be dyed simultaneously to ensure uniform color and high color fastness. In addition, the jigger can effectively control the shrinkage and feel of the blended fabric, so that it maintains a good appearance and performance after dyeing. In actual production, operators need to continuously accumulate experience, optimize the process flow, and improve production efficiency and product quality.