To a certain extent, cotton-polyester canvas fabrics need to be dyed polyester in dyed acid baths, and then enter the reactive dye alkaline bath cotton. With this method of dyeing, the interaction between dyes is small, the process is easier to control, the higher dye uptake rate can be obtained, and the dyeing effect is better.
The cotton-polyester canvas fabric effectively dyes cotton and polyester in the same bath under neutral conditions. Among them, the cotton can use reactive dyes with near-neutral neutrality in the PH value. In the operation, the polyester is made of a disperse dye that can be dyed under neutral conditions, and an appropriate amount of a pH adjuster is added to keep the dye bath in a neutral state. condition. The process is easy to operate, with good reproducibility and energy saving.
Selection of dyes for cotton/polyester canvas fabrics
Cotton and polyester canvas fabrics generally use dispersion and other processes in their operations. When they are processed, high-temperature disperse dyes with good sublimation fastness should be selected for hot dissolving dyeing. , to ensure the color fastness of the final product. For some bright colors, if low-temperature disperse dyes must be used, the baking temperature should be reduced during finishing, and the baking time should be extended as compensation.
The polyester component of the cotton-poly/poly canvas fabric is hydrophobic and oleophilic, so it is very easy to contaminate the oil in the process of use. Generally, in the dry condition, static electricity is easily generated and the dust is adsorbed, and the product is not easily oiled during washing. Wash, there are re-contamination. Through easy decontamination, the performance of polyester-cotton blended fabrics can be improved and the product quality can be improved.