With the use of automated equipment such as dyeing computers and centralized dyeing control, the quality of printing and dyeing has been greatly improved compared to before. However, the impact of the shaping process on the quality of printing and dyeing cannot be ignored. Today, let’s talk about several styling parameters that affect color change.
Five styling parameters that affect color changes
The design of the shaping process is set according to the state of the B/F fabric: width, weight, strength, and shrinkage. Among them, the following five parameters have a greater impact on color changes:
1. Temperature:
Resin: Dark color: 170℃; Light color (sensitive color): 150℃ However, resin: 150℃ Dry cloth: 130-160℃ is acceptable, subject to cloth dryness
The temperature of 100-150℃ has little impact on the color. When it is greater than 150℃, the higher the temperature, the greater the impact on the color.
2. Speed:
Set according to fabric structure and thickness, generally:
170℃ 14M/MIN (gram weight greater than 250GM)
170℃ 16M/MIN (gram weight 200-250GM)
170℃ 18M/MIN (gram weight less than 200GM)
If the cloth surface does not dry during actual operation, first check whether the machine is normal; if so, first notify the person in charge of the process to slow down the machine speed and make changes to the process. Under the same temperature, keeping the cloth surface dry (0-6% moisture content) with a difference of 2-3M/MIN will have negligible impact on the cloth surface.
3. Circulation style:
a>. Generally, Class II air is used to pass the resin. The thermal efficiency is higher than Class I, and the impact on color is greater than Class I. Large; b>. However, Class II wind is required for tighter and thicker structures with resin; Class I wind is used for looser and unstable fabrics. The final shape is based on the dryness of the cloth, and the impact on the color can be ignored at the same temperature.
Several styling parameters that affect color changes
4. Materials:
a>. The resin and catalyst react chemically with the fiber and combine covalently, changing the molecular arrangement inside the fiber, which has a greater impact on the color change of the fabric; b>. The greater the weight of the resin and catalyst, the greater the impact on the color. The larger the value, the smaller the effect; c>. The influence of soft oil on color is based on its own color and ionicity. Cationic soft oil (surfactant) has a greater impact on the color of the cloth than soft oil with a clean and white appearance. It has a greater impact on the color of the cloth than non-ionic soft oil.
In short, the amount of resin and soft oil added to a finishing formula combination The higher the value, the greater the impact on the color of the cloth surface; the smaller the amount of resin and soft oil, the smaller the impact on the color of the cloth surface. This is a priority when designing the process.
5. Door width:
The shaping process is designed according to the weavingThe structure of the fabric is different, the number of needles of the KN machine is different, and the influence of the PD cylinder type determines a more reasonable door width. The principle is to ensure that the shrinkage of the fabric in the warp direction Before trial trimming, you should first check and sort out the shaping process to ensure that the door width meets the process requirements.
Otherwise it will affect the visual judgment of the colorist, especially double beads, double-sided, rib, LYCRA For fabrics such as ribbing and jacquard, excessive differences in width will affect the color of the fabric.
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