Why should antistatic treatment be applied to plastic film printing? What are the treatment methods?
The static electricity causes the membrane to stick together each other, increases the printing, the cutting, the finishing and so on the process difficulty, causes the work hour consumption to increase.
Processing methods: static electricity brings a series of problems to printing paper and plastic. The paper through the electrostatic eliminator to eliminate static electricity in the printing process, but this method is applied to the plastic printing on the poor effect of patina. The antistatic agent to eliminate electrostatic method: antistatic agent is composed of some surfactants, the molecules containing hydrophilic and non hydrophilic, lipophilic and plastic has certain compatibility, hydrophilic can be ionized or adsorption of water in the air. A thin layer of conductive layer is applied to leak the charge so that it acts as an antistatic agent. There are many kinds of antistatic agents. There are two kinds of water and powder. Different varieties of plastics should choose their corresponding antistatic agent. For example: PE main antistatic agent has N - bis hydroxyethyl - N, methyl ammonium sulfate, salt amide, propyl - beta - hydroxyethyl, two methyl phosphorus, two hydrogen ammonium, stearic amide, propyl - beta - hydroxyethyl, two methyl ammonium nitrate, etc.. The ion electrostatic elimination processor: anion and cation gas by ion electrostatic ion gas processor, however in the plastic film surface to achieve the purpose of eliminating static electricity. This method works well in a short time, but the durability is not very good.
Film printing, bag making, packaging. In the storage, storage process, with electrostatic, will make the bag surface adsorption of dust in the air. Therefore, plastic packaging, printing materials, antistatic treatment must be carried out
Due to electrostatic adhesion, the air can not enter between the film and the film, hindering the continuous drying of the ink layer. In the environment of high temperature and high humidity, easy to form a layer of ink adhesion. Light makes the ink printing part of denim, while the film is not easy to open, thus becoming the image plots debonding, scrap, resulting in economic losses.
When printing large width plastic film, large area static electricity is produced due to large contact area. If the machine speed is fast, and the original resin is not doped with antistatic agent, light will affect the quality of the product, deterioration of labor conditions. Heavy fire may cause fire or explosion.
