Basic knowledge of PET protective film performance and quality issues

PET protective film has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. Its shortcomings are that it is not resistant to strong alkalis, and it is easy to be electrostatically charged. Since there is no suitable preventive method for this, PET is used in the use of PET. Be careful when applying the protective film. PET protective film is a kind of packaging film with comprehensive performance, in addition to good transparency and gloss; PET protective film has good air tightness and fragrance retention; medium moisture resistance, and the moisture permeability decreases at low temperature. Compared with other protective films, the toughness of PET protective film is very outstanding, so it is suitable for secondary processing such as printing and paper bags. Of course, in the process of production and processing, PET protective film often has some quality problems, among which the more common ones are rainbow patterns and crystal dots. Since the surface of the PET protective film material needs to be hardened, and the hardening process is bound to undergo high temperature treatment, a strip of colored stripes will be formed on the surface of the material. To avoid crystal points on the surface of the PET protective film, the direct and effective way is to protect the surface of the PET protective film to prevent particles or other impurities from appearing on the surface, so as to ensure the quality of the PET protective film. The crystal point refers to those small pits on the surface of the PET protective film material. Generally, it is more common on the three-layer PET protective film material. The reason for its formation is related to the silica gel. Since the PET protective film is synthesized with silica gel, the silica gel has the ability to flow. Therefore, once the extrusion of some small particles is encountered, a crystal point will be formed. The above is the content explained today, I hope it can be helpful to you. If you want to know more information, please contact customer service online, or call the company's service hotline (top right corner of the website) for consultation, we will definitely Dedicated to provide you with quality service!