When buying paint protection film products, there are actually some small ways to test the quality of the adhesive line.
1. Smell it
A good glue is odorless or has a slight odor, and a bad quality glue will have a pungent odor.
2. Touch it
Feel the viscosity of the adhesive layer with your hands, if you find that it is particularly sticky, it must not be a good glue.
3. Rub it
Take a small piece of car coating film, rub the glue layer with your fingers, if you can easily rub it off, it proves that there is more residual glue, not a good glue.
4. Stick and stick
After folding the glue surface in half and pasting it with each other many times, if there is no glue drop, it means that the quality of the glue layer is fine.
The paint protection film has high requirements for initial tack and stickiness, and it is easy to apply and not easy to edge, so the formula of the glue needs to be tried and tested. In addition, it is also necessary to consider the adhesion between the glue and the substrate, that is, the adhesion between the colloid and the substrate.
The rougher the substrate, the greater the adhesion. The roughness of the substrate will affect its light transmittance and other aspects of performance, so how to balance the relationship between various properties is a major problem faced by substrate manufacturers in R&D and actual production.
