Dry processing method of textile coating discharge printing

Abstract

The invention discloses a dry treatment method for discharge printing of a textile coating. Under the condition of multi-color register printing, the prior process is easy to cause the problem that the effects of hygrothermal conditions on different color registers are inconsistent during the treatment, thereby failing to ensure the effect and the stability of the discharge. The method comprises the following steps: printing paste is used to print on a fabric; the printed fabric is dried; the dried printed fabric is subject to contact heat treatment; and impurities adhered to the fabric are removed through water scrubbing. The method ensures that the humidity content of the fabric is uniform and consistent, avoids the inconsistent dryness and humidity caused by the change of environmental factors, different printing sequences of different color registers and so on, and fully ensures the effect and the stability of the discharge.

Description

technical field [0001] The invention relates to the field of textile printing, in particular to a dry treatment method for textile paint discharge printing. Background technique [0002] Textile printing is usually divided into direct printing and discharge printing. Direct printing is to apply color paste containing colorants (dyes or pigments) to textiles, and then heat-treat the colorants to fix the colorants on the textiles, and finally wash, desizing and post-treatment to achieve white or light-colored textiles Form the desired floral printing effect. Discharge printing is printing on textiles with deep background color (including black background color). The printing paddle used contains chemicals that can destroy the background color dye. This chemical is called discharge agent. Printing with this printing paste After post-treatment, the original background color on the printing part of the textile can be destroyed and appear white, forming a deep white flower effec...

AI Technical Summary

Problems solved by technology

[0006] Compared with the method of steaming treatment, the above two dry discharge printing methods have the characteristics of simple process, energy saving and less equipment investment, but there are also many shortcomings: the hot pressing method is only suitable for manual printing, and cannot be used for cloth printing. Processing, and during pressing, the printing paste on the fabric is still wet without drying, and the fabric cannot be folded during the process of moving from the printing table to the pressing machine, and it is easy to Contamination of equipment and cloth surface, also affects the clarity of printing outline

In addition, the common disadvantage of hot pressing and hot baking is that it is difficult to control the drying degree of the fabric after printing.

Practice has proved that the effect of discharge printing is largely limited by the dryness and humidity of the printing paste when the fabric is heat treated, and the humidity of the heat treatment environment. The existing dry discharge printing method does not dry the fabric before heat treatment. The dry humidity of pulp is greatly affected by the residence environment and time before heat treatment. Seasonal changes, ambient temperature at different times of the day, and the length of residence time can all cause inconsistencies in dry humidity, especially in multi-color printing. In some cases, since the printing time of the first set of colors and the last set of colors is often quite different, the dry humidity of the printing pastes of different sets of colors must also have a large difference, which can easily cause the humidity and heat conditions during processing to affect different sets of colors. The effect of the effect is inconsistent, so that the effect of dye discharge and its stability cannot be guaranteed

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