Effect of temperature and humidity on the printing speed of PVC gravure printing machine

Effect of temperature:

Ink drying speed: In the PVC gravure printing process, ink drying is a crucial link. Temperature has a direct impact on the evaporation rate of the solvent in the ink. When the temperature rises, the solvent evaporates faster and the ink drying time is shortened, which helps to increase the printing speed. However, too high a temperature may cause the ink to dry too quickly, causing the ink to clog the nozzle or printing plate, which in turn reduces the printing speed. Therefore, when setting the printing temperature, it is necessary to find a balance point that can not only ensure timely drying of the ink, but also avoid problems caused by too fast drying.

Adaptability of printing materials: PVC materials are also sensitive to temperature. At high temperatures, PVC films may soften and deform, causing inaccurate printing overprinting or stretching and narrowing of printed products. In addition, excessive temperature may also affect the physical properties of the PVC film, such as heat shrinkage characteristics, thus affecting the overall quality of the printed matter. Therefore, when adjusting the printing temperature, it is necessary to comprehensively consider the heat resistance of the PVC material and the printing requirements.

Effect of humidity:

Ink viscosity and dryness: Humidity has a significant impact on the viscosity and dryness of ink. In a high-humidity environment, the water in the ink is not easy to evaporate, which may cause the viscosity of the ink to increase and the fluidity to deteriorate, thus affecting the continuity and uniformity of printing. In addition, too high humidity will slow down the drying of ink and extend the printing cycle. On the contrary, in a low-humidity environment, the ink is too dry, which may cause the ink particles to fly or clog the nozzle, which also affects the printing speed and quality.

Static electricity problem: Humidity is closely related to the generation of static electricity. In a high-humidity environment, since the air contains more moisture, it helps to reduce the generation of static electricity. However, if the humidity is too low and the air is dry, the static problem will become more serious. Static electricity may cause ink particles to be adsorbed on the nozzle or printing plate, affecting the clarity and stability of printing.

Printing material properties: Humidity also affects the dimensional stability and surface tension of PVC film. Humidity changes may cause the PVC film to expand when absorbing water or shrink when losing water, thus affecting the accuracy of printing overprint. In addition, humidity will also affect the surface tension of the PVC film, thereby affecting the adhesion and diffusion of ink on the film surface.

In order to optimize the printing speed and quality of the PVC gravure printing machine, the effects of temperature and humidity need to be comprehensively considered. In actual operation, constant temperature and humidity conditions can be maintained by adjusting the air conditioning and humidification equipment in the printing workshop. At the same time, according to the characteristics of the ink and PVC material used, the printing parameters are reasonably set to ensure the timely drying of the ink and the stability of the printing material. In addition, regular maintenance and upkeep of gravure printing machines to keep the equipment in good condition is also the key to improving printing speed and quality.