The top causes of adhesive residue for car window films
Adhesive residue is one of the most important quality problems of automotive films. It not only affects the appearance, but also causes damage to our automotive glass and paint. And it is difficult to clean, increasing the cost of maintenance. Therefore, when we choose a car film, we must choose a reliable one and not be greedy for cheap. Once we choose a solar film with adhesive residue, it will increase our cost.
Now Let’s explain what can bring such problem, and how Sunvase® window films to avoid it.
The PSA ingredient ratio is not well arranged, resulting in a large amount of adhesive residual and degumming.
The main ingredient of PSA is pressure sensitive adhesive.Generally, pressure-sensitive adhesives have deformation and fluidity, that cause adhesive residue.
Therefore, we need to make Crosslinking for the pressure-sensitive adhesive to prevent it from residue.However, if the pressure-sensitive adhesive is not well cross-linked, the uncross-linked polymer will slowly penetrate into the surface of device where films installed. This process is very slow, so even a short-term test can’t find it, that is why adhesive residue happened after a long time use, but the test is no problem initially.In order to solve this problem.
Sunvase® window films generally add surfactants that are compatible with pressure-sensitive adhesives and use pressure-sensitive adhesives with a high gel fraction, such as rubber-type pressure-sensitive adhesives.
PSA High and low temperature experiment.
If the quality of the PSA itself cannot pass the high and low temperature alternating damp heat test, it means that its weather resistance is not good, and there will have adhesive residue during use.
Sunvase® window films only use PSA from top brand all over the world, such as Ashland to avoid adhesive residue.
Adhesion strength between substrate film and PSA.
If the bonding distance between the substrate film and the PSA is too large, it will easily bring adhesive residue under long-term use and high temperature and high humidity environment.
Sunvase® car films use rubber-type pressure sensitive adhesives. It is manufactured by co-extrusion process, so that the elongation of the pressure-sensitive adhesive layer is large, and the bond between the adhesive layer and the substrate film is very firm.
Viscosity of PSA
The best balance between Viscosity of PSA and firmness of film installation is very important, if Viscosity too high, will bring adhesive residue, if too low will make films installation not so stable.
According to our above 10 years production experience, we can reasonably control the amount of adhesive used and use high-quality adhesive to achieve the highest balance.
Substrate film corona conditions
The substrate film has no corona or insufficient corona, resulting in poor adhesion then bring the adhesive residue.
Sunvase® window films accord to strictly corona test try best to avoid adhesive residue.
Above reasons we all can well control that is why Sunvase® window films without any issues of adhesive residue.We can have longer quality warranty compared to our competitors,adhesive residue is under our quality warranty!