Xiao Bian opens up the grey cloth lecture hall and brings you fresh information. ~ Hurry up to learn ~~
So when faced with thermoset ink printing, the printed pattern fades? What should I do about this annoying question?
Heat treatment: Since the thermosetting ink requires a sufficient polymerization temperature to be fixed, it is necessary to pay attention to the normal operation of the temperature control device and ensure that the heating temperature meets the requirements. It is necessary to prevent the temperature on the actual job position from being displayed on the dial of the drying tunnel to indicate that it reaches the use temperature, but the actual fabric does not reach the temperature. If necessary, the display temperature on the temperature control panel can be adjusted slightly within the temperature range of the fabric. Higher ~
Ink formulation: For different fabrics with different formulations of thermosetting inks, the printing characteristics, heating temperature, etc. are all different, so we must choose the right ink, must not be used indiscriminately. In addition, pay attention to the effects of changes in the printing equipment and the printing environment on the ink parameters. Under the same ink formulation conditions, the annual decrease with the effect of shear, so that the ink is printed more and more dilute; viscosity also decreases with increasing temperature, so the summer ink is thinner than in winter.
Substrate: Discoloration is not only related to curing temperature, curing time, ink formulation and printing adaptability, but also related to fabric composition and structure. Such as cotton and linen fibers absorb ink better than chemical fiber, but also more resistant to high temperatures, so use different formulations of ink. In addition, pay attention to the different structure of the fabric, the structure of the loose fabric has good adhesion to the ink. Because the ink under the action of the blade pressure, it will infiltrate into the fabric wrapped fabric fibers. The tight structure of the fabric ink is difficult to penetrate the fiber inside, just stay on the fabric surface, so that for the same ink, its adhesion is not good, we must use more high adhesion ink. Some economical elastic transparent pastes work well in improving the adhesion of tight fabrics. Other inks may be printed after the bottom of the transparent paste is used. Can improve adhesion, but also enhance tensile properties.
Xiao Bian said so much so quickly learn it ~~
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