Once the paper with static electricity, it will bring a lot of trouble printing. The first is adding antistatic agent in water-based ink, paper and paper between hold, not neat. In the printing process, because of the electrostatic attraction, between the sheets tightly paste together, sometimes two, sometimes several, sometimes a ream of paper difficult to separate, resulting in suction nozzle of paper separation suction paper, serious impact on the printing efficiency. Plastic materials in color, because the electrostatic discharge, often found stabbing like ink overflow, overprint deviation increased in printing edge of Pan fluff; inks to produce static electricity will produce shallow network or the omission phenomenon; plastic film and ink on the surface of dust, hair and other different materials prone to knife wire and other quality problems. When rewinding, slitting, bag, and other technology, the electrostatic discharge will damage equipment of photoelectric error correction system, electromagnetic control system. 

In combination with the production practice, the use of packaging materials (packaging what products), the use of the premise of customers, etc., to take different antistatic technology to eliminate static electricity. Common antistatic techniques are as follows: 

1, physical elimination method 

Physical elimination method is used to eliminate the inherent characteristics of static electricity without changing the material function. Such as "ground" elimination method, is the installation of anti-static brush in the process. Will brush body is placed on a paper or plastic coil winding or put volume place, and makes static brush the ground end reliable grounding, and cannot pick on the device or guide roller. As the equipment is likely to be grounded; the Department guide roll through the anode treatment, the surface of the alumina, and alumina is not conductive. 

2, chemical elimination method 

Chemical elimination method electrostatic anti static agent processing technology, mainly antistatic agent (surfactant) by adding (filled) or coating technique, the resin or substrate for motor can be modified method is more thorough and perfect antistatic technology. But because the antistatic agent is added or coated, the chemical composition of the material is changed, so that the technology is not suitable for the treatment of the paper, only for the modification of the plastic resin. 

Especially in the packaging of food, medicine, cosmetics, chemical products, etc., should pay attention to safety, hygiene and compatibility with the matrix resin and so on, so the technical content is high. The packaging material with the anti static electric motor can not only eliminate the various quality accidents caused by static electricity, but also improve the packaging efficiency and ensure the sealing strength. 

Method for eliminating the harm of water based ink and antistatic agent 

3, coating type processing technology 

The coating antistatic agent treatment technology is to make the ionic surfactant into antistatic coating, which is applied on the surface of the plastic film to prevent the charge accumulation effect. The selection of coating antistatic agent is determined according to the size of the work function of the coated substrate. The work function of plastic materials, will be negatively charged its work function; small, are positively charged. Common plastic material work function from big to small order front have been talked about, PP, PE extremely easy with a negative charge, should adopt the cationic surfactant coated; pet, PA is extremely easy with positive, appropriate using anionic surfactant coated. The surface wetting tension of plastic film is larger than that of 38dyn/cm, which has good film resistance, friction resistance and chemical resistance. 

4, add type processing technology 

The technology (i.e. masterbatch technology) will add type antistatic agent according to a certain concentration (several tens of percent a few percent) and thermal plastic resin mixture, and add a variety of additives, melting, mixing mixing, granulation of antistatic masterbatch. Antistatic agent selection, should pay attention to the compatibility with the matrix resin. If the compatibility is too poor, the system has the function of anti - Electrostatic particles is poor, but the compatibility is too good, the antistatic agent to the surface migration speed is too slow, it is difficult to form an anti - electrostatic water film. Selection and resin product of the same resin as the matrix resin, in melting, mixing, granulation process, as far as possible to maintain a low processing temperature to prevent antistatic agent for thermal stability is not good and decomposition and even deterioration. 

Preparation of antistatic plastic film with anti electrostatic particle system, often adopts three layer coextrusion blow molding process (ABC). Pay attention to add the proportion of antistatic masterbatch to be determined according to the concentration of the active substances, and on the basis of the test results are adjusted to the appropriate level, so that the surface resistivity of the PS in about 1011 ohm can; the dosage increased not only increases the cost of product, and will bring adverse effects on the latter part of the process.