How to improve the printing effect of cotton cloth digital printing machine

by:angelacrox     2021-09-14
The effect of the digital printing machine, today is mainly about how to improve the printing effect of the cotton digital cloth printing machine from the aspect of fabrics and other auxiliary materials. Yanyan printing machine manufacturers will analyze the impact of each on production for everyone. one. Detection of fabrics. The fabric used in the all-cotton digital cloth printing machine is the common printing cloth in the market, cotton, rayon, and silk...mainly to check whether the fabric is suitable for printing. The items tested are PH value, gross effect, weft skew, and cleaning. PH value has a great influence on printing. Reactive printing is colored under weak alkaline conditions, the pH is 8-9, and the pH value of the fabric should be slightly acidic at 6-7. If the pH value of the fabric is too high or too low, it will affect the steaming and fixing, and there will be color difference or mottling, to batches of defective products. The wool effect refers to the hygroscopicity of the fabric. Generally, the qualified ones can be delivered in the cloth factory. The wool effect is not good, the hygroscopicity is poor, the dye uptake rate is low, the color yield is small, and the color is light, which is not as expected. If you want the color, the post-processing cream color is more, and the water consumption is large. The latitude slope is generally controlled between 3 and 5 cm. If the weft skew is too large, it will be further increased during sizing, and the cotton cloth digital printing machine will often crepe during printing, which will affect the printing speed and printing quality. The cleanliness of the fabric, if the fabric is not clean, the finished products will be defective products, wasting resources. The raw edge of the fabric should not be too long, only within 1 cm, otherwise the nozzle of the cotton digital cloth printing machine will be wiped during printing, and there will be a blockage. two. Beating, preparation and modulation of pulp. According to the type of fabric, different formulas are prepared, such as cotton, linen, silk, wool... all are different. The fabrics of the same material have different weights and different formulas. This step is also crucial for improving the effect of the cotton digital cloth printing machine. For example, pure cotton: formula with a gram weight of more than 300 g/m2: urea 10% sodium sulfate 4.5% baking soda 3% sodium sea bath 1% GTC-6 2% (a starch paste) gram weight 300 The following formula: urea 7% sodium sulfate 4.5% baking soda 3% sodium alginate 1% GTC-6 2% (measured in one hundred kilograms). The slurry formula for the effect of digital printing machine. Urea plays a role in absorbing moisture and swelling the fiber. Yuanming powder is the dye-promoting salt, which allows the dye to be dyed quickly and evenly. Baking soda provides an alkaline environment for reactive dyes. Sodium alginate and GTC-6 make the fabric smooth, and the ink is sprayed on and the shape does not spread, making the pattern printed by the all-cotton digital cloth printing machine exquisite. When beating, first weigh the water, put it on the beating machine and stir. Gradually put the weighed urea into the bucket and stir for about 10 minutes. After the urea is fully dissolved, now gradually add sodium sulfate and stir for 20 minutes to fully deepen it. Then add the sodium alginate and GTC-6 mixture gradually into the bucket and stir for 30 minutes. The paste is fully dissolved in water to form a paste. Finally, the weighed baking soda is melted with a proper amount of water and then added to the paste and stirred for 2 hours. The ingredients are fully dissolved and the paste is delicate and refreshing. Pay attention to the temperature of the pulp barrel when beating in summer. If the temperature is too high, the baking soda will decompose, which will affect the coloring rate during steaming and fixing, and the desired color will not be achieved. The beaten pulp is filtered with 80 mesh screen to remove solid impurities and stored in a cool room. In winter, use warm water for beating, so that the various ingredients are fully dissolved, and the finished pulp is best to be sizing on the same day. If the storage time is too long, the temperature is too low, and there will be urea and sodium sulfate, which will affect the coloring rate during fixing. It is worth noting that the beating pulp will be used up within two days. If it is not used up, when there is a digital printing machine for cotton cloth next time, it must be put on the beating machine and mixed evenly before it can be used, otherwise it will be used when the color is fixed after sizing. The coloring rate is very low and it becomes a defective product.
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