Common Dyeing Equipment Processes and New Dyeing Techniques – Part 7

Common Dyeing Equipment Processes and New Dyeing Techniques – Part 7

Section 3 New Dyeing Technologies – part 1

A. New Technology of Airflow Dyeing

Features: Efficient, energy-saving, and environmentally friendly; Changed the traditional traction method of rope like fabric circulation and the exchange method with dye solution

Core technology: aerodynamic circulation system

The liquid circulation system and dyeing process control system using atomization principle or air pressure permeation principle nozzles.

Comparison: Compared with the comprehensive performance of overflow jet dyeing, it has better technical and environmental protection performance, and the dyeing equipment has a high cost-effectiveness

Shortcomings: The fabric is prone to scratches and the dyeing process is not yet mature.

Development prospects: Accelerate the research and development of processes that are completely suitable for air flow dyeing; Implement dynamic quality control and multi tube high-capacity operation.

B. New Technology of Microwave Dyeing

principle

When the fabric immersed in dye solution is exposed to microwave radiation, the dipole of polar molecules (such as water molecules) in the fiber undergoes repeated polarization, changes the arrangement direction, and generates heat through repeated friction between molecules, rapidly converting the energy absorbed by electromagnetic waves into thermal energy.

Some dye molecules can also undergo induction and heating, thereby achieving rapid dyeing and fixation.

Advantages:

Microwave technology is suitable for dyeing polyester fabrics, polyester cotton fabrics, acrylic fabrics, polyester nitrile fabrics, etc.

Under the irradiation of Weibo, the dyeing time is shorter, which saves energy compared to traditional dyeing. The color fastness, color and other indicators of the dyed fabric have been improved compared to traditional processes.

C. New Technology of Microsuspension Staining

Application scope: Microsuspension staining technology is mainly applied in the dyeing and processing of protein fibers. These protein fibers mainly include wool, cashmere, and silk.

Principle:

In the dyeing process of wool and cashmere, synthetic special additives are added to form dye micro suspension particles in the dyeing bath, which are uniformly adsorbed on the fiber surface at low temperatures. Quickly raise the temperature of the dyeing bath, causing the dye particles to disintegrate at a certain temperature, and the dye molecules to diffuse and fix inside the fibers on site.

Advantages:

1. The heating time of the dyed fibers is shortened, and the damage is reduced. For loose fiber dyeing, the spinnability of the dyed fibers is improved.

2. During the dyeing process of silk textiles, the fiber surface has a high adsorption rate for dyes.

3. The brightness of the color is improved, and the hand feel is also improved

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