Static electricity brings a series of troubles to plastic printing, which can be summarized as follows: 1. Discharge caused by static electricity can cause fire or explosion accidents in severe cases. ? In addition, the phenomenon of color migration and void boundary (that is, a phenomenon in which two different color patterns should be connected but leave a border blank) is also a printing defect caused by static electricity. Static electricity is caused by friction during film extrusion and winding. We know that atoms are composed of nuclei and outer electrons. When the two substances are rubbed, the electronegative side gets electrons and becomes negatively charged, and the weak electronegativity loses electrons and takes positive charge. If only one of the friction materials is metal, static electricity will not be generated because the electrons can flow freely in the metal; if both types are non-metallic, one side is positively charged and the other side is negatively charged. After the film is rolled up, it is rolled tightly due to electrostatic attraction. To eliminate static electricity, an antistatic agent is generally added to the ink, which can improve the conductivity of the plastic surface after printing, and quickly discharge the charged plastic, thereby preventing the accumulation of static electricity. However, the printing equipment must also be well grounded at the same time, otherwise the static electricity cannot be discharged, and the purpose of eliminating static electricity cannot be achieved. ? Patient Bed,Movable Medical Bed,Patient Bed For Sick,Hospital Bed With Cranks Jiangmen Jia Mei Medical Products Co.,Ltd. , https://www.jmmedicalequipment.com
2. Static electricity makes the films stick to each other, which can promote the adhesion of the ink layer. At the same time, it is not conducive to compounding, slitting, finishing and other operating procedures, which consumes man-hours. ?
3. Static electricity makes the bag surface vacuum, which not only affects the bag making, but also reduces the quality of the product. ?
Analysis of static electricity in plastic printing