The development and application of PE protective film mainly started in the early 1970s. In Japan, the United States and some European countries, after decades of development, PE protective film has been widely used in machinery, instrumentation, electronics, building materials and other industries. application.
China started in the early 1980s and grew up in the early 1990s. Therefore, China has a certain gap with developed countries in terms of basic research, production technology and applications of protective films. For example, PE protective film in developed countries is divided into dozens of kinds only by substrate, and PE protective film for simple protection, light processing, medium processing and rework is divided from the purpose of processing.
The advantage of the PE protective film is that the protected product is not polluted, corroded, scratched and protected from the original smooth and shiny surface during the production, processing, transportation, storage and use of the PE protective film, thereby improving the quality and market of the product. Competitiveness.
Talking about the adsorption function and application field of PE protective film
PE protective film adsorption function and application areas:
During the process of making the PE protective film, corona treatment is generally performed, which causes the film to increase its surface area and carry static electricity, and then carry out subsequent coating work, so that the film and the glue can be well combined. .
The PE protective film is effectively applied to the inner layer of the film. The main material of the PE protective film is that the EVA has a certain adsorption function when it is used, thereby realizing the entire adsorption function of the film. The electrostatic formula of these two kinds of electrostatic membranes is also different, and the quality and price of the products are different. The electrostatic film with the second lowest price will transfer the electrostatic components to the surface of the product, resulting in defective products and scrapping.
PE protective film is a kind of surface protective film which is more common in our daily life. Because of its good adhesiveness, docile and no residue, it is widely used in mobile phones, notebook computers, TV screen surfaces, lcd screens, etc. field.
In the production process of PE protective film, the processing temperature of the barrel is appropriately increased and the method of polycooling is adopted. The transparency of the film can be increased. In fact, in order to produce a transparent PP film, a water quenching method must be used. For example, if air cooling is used, the produced PP inflation film is vague and translucent due to poor cooling effect. For this reason, an appropriate increase in processing temperature and high-efficiency cooling means in production are effective ways to improve transparency. A small amount of a polyacrylate resin excellent in transparency and compatibility with a PE protective film or a PP protective film is added.