PVC film printing is a kind of printing. The substrate is pvc material, mostly gravure printing. Simply put, it is to print patterns on plastic. Like ordinary printing, there are screen printing offset printing. Therefore, the quality problems such as inaccurate overprinting, color difference, paste, dragging, pinholes, crystal dots, missing printing are the same as other printing. Most of them are caused by static electricity. Therefore, in the film printing process, anti-static is Very important, especially in the dry seasons of autumn winter.

      1. Install static eliminator: It can also be called static elimination equipment. It consists of a high-voltage power generator a discharge electrode (usually made of ion needles). The air is ionized into a large number of positive negative ions through high-voltage corona discharge. The wind blows a large number of positive negative ions to the surface of the object to neutralize static electricity, directly bring the static eliminator close to the surface of the object to neutralize static electricity. There are three types: manual, automatic ion air gun.

    The movable contact static eliminator means that the user holds the device in contact with the charged body, eliminates the static electricity on the charged body at the moment of contact. The automatic static eliminator is carried by people, then the equipment will automatically sense the surrounding static electricity eliminate the static electricity wherever people go, without the equipment being in contact with other special bodies. Since the ion air gun itself neutralizes the static electricity by the charged air current, be careful in the use process, because the printing ink is a flammable material, improper operation, easy to cause fire.

    2. Increase ink viscosity: In printing production, we will see patterns with beards, which are called ink beards, which are also caused by static electricity. They often appear in PVC film printing, because PVC film cannot absorb ink in time , When the effect of static electricity causes the ink to flow around, it is necessary to increase the viscosity of the ink reduce the printing speed to solve the problem. add antistatic agent during the printing process.

    3. Control the air humidity in the production environment: the main cause of static electricity is dry air, the reason why production is rarely affected by static electricity in summer is that the air humidity in the production environment is relatively high, which is about 65% when it is raining. The charge is easily dissipated. Therefore, the PVC printing workshop must either keep constant temperature humidity, control the temperature above 25 degrees, the air humidity in the range of 45% to 65%, but this investment is small; there is another way to use a humidifier to eliminate Drying controlling the air humidity are also feasible anti-static methods.