Why does PVC wood grain film generate static electricity?

 PVC wood grain film is a plastic film used for decorating furniture, doors, windows, walls, etc., with the advantages of waterproof, moisture-proof, anti-corrosion, fire-proof, wear-resistant, etc. The surface of PVC wood grain film is printed with various imitation wood grain or other patterns, with rich colors and elegant appearance. However, PVC wood grain film also has some problems in the production, processing and use process, one of which is static electricity. Static electricity not only affects the quality and performance of PVC wood grain film, but also brings inconvenience and danger to the operators.

So, why does PVC wood grain film generate static electricity? This article will analyze from the following aspects:

1. The material characteristics of PVC wood grain film. The main component of PVC wood grain film is polyvinyl chloride (PVC), which is a polymer material, belonging to insulator, not easy to conduct electricity. When PVC wood grain film contacts or rubs with other objects, it will transfer electric charges, making the surface of PVC wood grain film carry positive or negative charges, forming static electricity. Because of the high resistance of PVC wood grain film, the charges are not easy to flow or dissipate, so the static electricity will remain on the surface of PVC wood grain film for a long time, until it meets the conductor or grounding object to discharge.

2. The production process of PVC wood grain film. The production process of PVC wood grain film mainly includes extrusion, printing, compounding, cutting and other steps, which will make PVC wood grain film contact or rub with machines, molds, rollers and other metal parts or other materials, thus generating static electricity. Especially under the conditions of high-speed operation, high-temperature heating, high-pressure extrusion, etc., the amount and intensity of static electricity generation will be greater. In addition, the printing process of PVC wood grain film, the use of ink, solvent and other will also affect the generation of static electricity, because their dielectric constant, polarity, volatility and other factors will change the charge distribution and potential difference on the surface of PVC wood grain film.

3. The use environment of PVC wood grain film. The use environment of PVC wood grain film will also have a certain impact on the generation of static electricity, mainly the change of temperature and humidity. Generally speaking, the higher the temperature, the lower the humidity, the drier the air, the easier the static electricity generation. This is because the dry air will reduce the moisture content on the surface of PVC wood grain film, increase its resistance, and make the charges more difficult to flow or dissipate. On the contrary, the lower the temperature, the higher the humidity, the more humid the air, the more difficult the static electricity generation. This is because the humid air will increase the moisture content on the surface of PVC wood grain film, reduce its resistance, and make the charges easier to flow or dissipate.

The impact of static electricity on PVC wood grain film.

Static electricity has a certain impact on the quality and performance of PVC wood grain film, mainly manifested in the following aspects:

Static electricity will adsorb dust, dirt, bacteria and other impurities, making the surface of PVC wood grain film dirty, rough, lose luster, affecting its appearance and decoration effect.

Static electricity will affect the printing quality of PVC wood grain film, making the adhesion, drying speed, color stability and other of the ink decrease, resulting in the problems of blurred, discolored, falling off and other of the printing pattern.

Static electricity will affect the compounding quality of PVC wood grain film, making the fluidity, wettability, adhesion and other of the compounding glue decrease, resulting in the problems of bubbling, cracking, delamination and other of the compounding layer.

Static electricity will affect the cutting quality of PVC wood grain film, making the wear of the cutting knife faster, the flatness, smoothness, accuracy and other of the cutting edge decrease, resulting in the problems of inaccurate cutting size, burr of the cutting edge, burn of the cutting surface and other.

Static electricity will affect the use safety of PVC wood grain film, making the charge on the surface of PVC wood grain film accumulate to a certain extent, discharge phenomenon, produce sparks, arcs, electric shock and other dangers, may cause fire, explosion, personal injury and other accidents.

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In order to reduce or eliminate the generation of static electricity, the following aspects can be improved:

Choose the appropriate PVC wood grain film material, preferably use PVC wood grain film with added antistatic agent, or spray or apply antistatic agent on the surface of PVC wood grain film, improve the conductivity of PVC wood grain film, reduce the accumulation of charge, reduce the generation of static electricity.

Optimize the production process of PVC wood grain film, control the temperature, pressure, speed and other parameters, reduce the contact or friction of PVC wood grain film with machines, molds, rollers and other, reduce the amount and intensity of static electricity generation. At the same time, pay attention to cleaning and maintaining the production equipment of PVC wood grain film, avoid the accumulation of dust, dirt, metal chips and other impurities, increase the generation of static electricity.

Improve the use environment of PVC wood grain film, maintain the appropriate temperature and humidity, avoid too dry or humid environment, reduce the generation conditions of static electricity. At the same time, pay attention to ventilation and exhaust, avoid the accumulation of oil, steam, dust and other pollutants, increase the generation of static electricity.

Install static elimination equipment, such as ion fan, ion air gun, ion wind rod, etc., which can produce a large number of positive and negative ions, and neutralize the charge on the surface of PVC wood grain film, eliminate static electricity. At the same time, pay attention to grounding and zeroing, avoid the potential difference between PVC wood grain film and production equipment, increase the generation of static electricity.

Do a good job of anti-static safety education and training, improve the anti-static awareness and skills of operators, avoid unnecessary contact or friction, reduce the generation of static electricity. At the same time, pay attention to wear anti-static work clothes, shoes, gloves and other, avoid human body electrification, increase the generation of static electricity.