Basic Structure and Substrate Design Technology of High Temperature Protective Film

Some high-temperature resistant films such as PI film, PEN film, and PEEK film, while the commonly used protective film substrates in shopping malls are PET and PE film.
1. Its main structure: outer layer: PET release membrane middle layer: PET electrostatic ion adsorption raw material inner layer: PET release membrane.
2. Product features: Anti scratch strengthening, - -, through hardening treatment, it is truly effective in protecting LCD, blocking reflection, -, effectively eliminating glare, making the visual effect more clear, electrostatic adsorption, -, electrostatic ion adsorption, without residual adhesive or damaging the screen, with good transparency. -, because the selected crystal points and transparency of the substrate are very good, the use effect is almost identical to the screen effect.
3. Summary of common abnormal phenomena and causes: During the gluing process of protective film, the glue has good leveling performance, uniform coating, and the resulting product has a delicate and transparent appearance. However, various drawbacks may also be caused by other reasons, most of which are related to surface tension.
In the protective film of adhesive tape, the film coated with adhesive is called the "substrate" or "backing".
Substrates play an important role in achieving the required functions in tape and enhancing its strength. Therefore, there are many different types and substrate design technologies that play an important role in the overall development of tape.
In packaging applications, hand tearing performance should be given priority. At this point, adhesives should be used in conjunction with paper substrates. In electrical applications, insulation and transparency should be emphasized, and polyester film (PET film) should be used. When high heat resistance is required, such as in welding shielding, polyimide should be used. When both wear resistance and smoothness are to be considered, polytetrafluoroethylene (PTFE) film should be used, In surface protection films that require flexibility as the main performance, polyolefin films should be used, while metal foil has conductivity and is suitable for connecting various objects, and foam is used for sealing mobile phones.
A good example of a polyolefin film with a undulating surface is that the substrate is not only sturdy, but also capable of being torn by hand, making it suitable for building applications.
The manufacturer of surface PET protective film used for deep drawing and forming of items such as water tanks is an example of substrate design, which fully utilizes the characteristics of the substrate.
The cutting strip used for silicon wafers is an example of substrate design, in which the tensile properties of plastic films are utilized. After cutting, although the cutting strip used to fix the chip during picking is stretched, it is still within the pressure that the design can withstand.