With the popularization of mobile phones and other digital products in China, protective film has gradually become a general term for screen protective film. What is the principle of protective film production?
1. Principle of protective film adhesive (glue)
The protective film is a viscoelastic polymer
film: its adhesive layer can be in close contact with the surface of the adherend, and flows into the groove of the adhered surface as much as possible, so that the effective contact area of the protective film is increased.
Tear film: All adhesive layers have higher peel resistance. The higher the peeling speed of the protective film, the higher the peel strength of the pressure-sensitive adhesive.
Adhesive performance (stickiness): initial adhesion<adhesive strength<cohesive strength<adhesive base strength.