Film printing should pay attention to the problem

â–¡ To print a colorful trademark, film testing and corona treatment determine the effect of the printed trademark. Even if there are even better technicians, inks, compounding conditions, mechanical equipment, temperature and humidity, the ink can be laid in the troughs when the surface of the film is impacted by electron currents to form uneven wavy peaks and valleys. Very strong, high temperature printing and multiple recombination to maintain true color. On the other hand, unprocessed printed films are discharged during the printing process and must be quickly disposed of. If they are not randomly processed, they will stick during the printing process or fade or fade in the compound or the ink will not be firm so that the printing can be formed. The trivial reaction affects the quality of the product.

□ Temperature and humidity also make printing awkward. Whether it is a single print, double print, or a variety of synchro-color printing temperatures should increase as the mechanical speed increases. However, when the temperature is too high, the color of the ink becomes lighter, and the film will melt out when the temperature exceeds a certain temperature. The corrugation-treated film will produce a rough and wide distance between the peak and the valley. Pattern deformation and high degree of kinking, even if barely able to recombine, the finished product manufacturers will produce delamination delamination in the heat sealing after the finished product, the film can not close to the bottle after heat shrink, moisture involved in the delamination, so the temperature should be 65 °C ~ Instant heating at 160°C. Moisture also affects the printing effect. The moisture in the printing room can easily adhere to the ink on the printing film. The ink cannot stick to the printing film, so that the film and the film, the pattern and the pattern adhere to each other, especially on rainy days. In winter greenhouses, the humidity must be controlled to achieve a certain printing effect.

□ The fidelity of the ink and pattern is inseparable, and some inks are resistant to high temperatures, such as cooking bags, PVC heat shrinkable films, inks that can be printed on inks, rayon inks, or polyamide gravure inks. Especially when matching colors, because many colorless fluorescent inks are not resistant to high temperatures, they begin to decompose around 140°C. High-grade pigments, organic solvents, and additives are dull and dark after temperature adjustment; the levels are not clear and the ink adhesion is not Strong. High composite peel strength, strong adhesion and bright color, you must use enhanced ink, high temperature at 230 °C or 240 °C or so printed dots are clear and complete, including the use of diluting agents can make the pattern does not take off copying nature.

In the new version of the trial color must be diluted according to the color of the ink or dilute, and then gradually reduce the friction with the ink gradually thickened or thickened, so that the color always maintain its original appearance, so the choice of different substrates, ink It will be different.

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