Five points that should be done in the selection of tarpaulin dyes

When making tarpaulins, dyes are used to dye them. However, when choosing a suitable dye, the following five points need to be done:

1. Choose dyes according to fiber properties: various fibers have different properties, so you need to choose suitable dyes when dyeing. For example, when cotton fiber is dyed, because its molecular structure contains many hydrophilic hydroxyl groups, it is easy to absorb moisture and expand, can react chemically with reactive groups, and is more alkali-resistant, so you can choose direct, reduced, vulcanized, and ice dyes. And reactive dyes. Polyester has strong hydrophobicity and is not alkali-resistant at high temperatures. Under normal circumstances, the above dyes should not be used, but disperse dyes should be used for dyeing.

2. Choose the dye according to the purpose of the dyed material: Because the purpose of the dyed material is different, the fastness requirements of the dyed finished product are also different. For example, the cloth used as curtains is not often washed, but it is often exposed to sunlight. Therefore, when dyeing, you should choose dyes with higher light fastness. As the dyeing of underwear and light-colored fabrics worn in summer, because it needs to be washed and exposed frequently, dyes with high fastness to washing, light and perspiration should be selected.

3. The choice of dyes in color matching: When color matching is needed, attention should be paid to their composition, solubility, color fastness, dye uptake and other properties when selecting dyes. Since the dyeing properties of various dyes are different, the dyeing effect is often affected by the difference in temperature, solubility, dye uptake, etc. during dyeing. Therefore, when performing color matching, you need to choose dyes with similar properties, and the closer the better, which can help control the process conditions and stabilize the dyeing quality.

4. Choose dyes according to the mechanical properties of dyeing: Due to different dyeing machines, the properties and requirements of dyes are also different. If it is used for jig dyeing, dyes with higher directness should be used; for pad dyeing, dyes with lower directness should be selected, otherwise products that do not meet the requirements such as dark front and light back, uneven color and luster will be produced.

5. Choose dyes according to the cost of dyes: When choosing dyes, we should not only consider the shade and fastness, but also consider the cost and supply of dyes and auxiliaries. For higher-priced dyes, other dyes that can be dyed with the same effect should be considered as substitutes to reduce production costs.