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Analysis of the effect of water washing and printing after printing
Release time：2020-03-02 14:13:43 Editor：Guangdong Milando Chemical Technology Co., Ltd.
Washing is closely related to the quality of printed products, which directly affects the hand feel, luster, whiteness, brightness and fastness of fabrics. For example, the silk fabric itself has a soft, smooth feel and a certain gloss. After printing and steaming, if the paste attached to it is not washed clean in the washing process, it will make the finished product feel rough and hard, and lose the luster that silk should have; if the floating color is not washed clean, it will reduce the color fastness of the finished product; under the condition of small water tank capacity and slow water exchange speed, dark color printing Because of the increasing concentration of dyes and auxiliaries in the water, fabrics tend to be stained white and light, which makes the color of the pattern fade. Therefore, choosing good washing conditions is one of the keys to improve the printing quality.
The simple and complex washing process of printed fabric depends largely on the size, dye and equipment selected. When the equipment, fabric varieties and dyes are the same, if the size is different, the complexity of the washing process is different. If the chemical size with good water solubility is used, it is much simpler or more economical than the starch size in terms of process and washing time. It is difficult to wash the starch pulp on the fabric after drying. It takes a long time for soaking, expansion, temperature and external force to wash out part of it. Even if amylase is used for catalysis, it still takes a long time to wash out the chemical pulp. Moreover, in order to maintain the activity concentration of the enzyme, the bath ratio is generally small. Due to the increase of the concentration of laitance and floating color, it is often in the desizing process In order to improve the quality of washing, it is necessary to choose a reasonable washing process.
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