After removing the invisible car coat, it is found that there is a glue layer on the paint surface of the vehicle, and it is either still sticky or hardened when touched by hand.
So, why does the invisible car clothing leave glue? Is there a car coating on the market that does not fall off? What should I do with the gelatin? Read this article patiently and you will get a complete and professional answer!
The car paint protection film can be roughly divided into three main structures: coating, substrate and adhesive layer, each structure has a different role, among which the role of the adhesive layer is to make the car coating and the surface of the car paint be closely fitted and play a protective role, so the main reason for the paint surface to remain glue is closely related to the rubber layer of the car coat.
- Retention possibility1
Improper tearing of the film
If the coating is torn off, the rubber is slightly left in the part or corner of the paint, then there is no need to worry about this situation, basically due to the technician's tearing technique and angle, resulting in friction between the coating adhesive layer and the paint surface before the glue is slightly off, and the quality of the car coating itself has nothing to do with the quality of the car coat itself.
In the case of slight local glue retention, only need to spray the adhesive remover on a towel and wipe it to effectively remove. Here is a tip for technician friends: when removing the film, ensure that the angle between the film and the paint surface < 45°, if necessary, you can pour some hot water to help soften the adhesive layer, so that the film will be more smooth and not easy to retain the glue.
- Retention Possibility2
Caused by improper construction
If the wrong solvent is used during the film, it will cause a chemical reaction between the solvent and the glue, which can also lead to partial or total retention of the glue. Or if the paint surface is not cleaned before the film, the residue such as resin or air conditioning water will react with the glue chemically, which will also cause glue retention.
If only a slight local retention of glue is placed, the treatment method is the same as above. If there is a large area of glue retention, the treatment method is detailed below.
- Retention possibility3
Inferior glue leads
If inferior glue is used when coating the car coating, or a special glue that is not specially developed for the car coating, the adhesive layer is easy to oxidize and deteriorate due to poor stability and weather resistance, and the shape and adhesion of the glue are easy to develop over time, such as the hardening of the adhesive layer and the fusion with the car paint, which will eventually lead to the serious consequences of tearing off the film and leaving the glue, and even harming the car paint.
The glue for the car coat has the advantages of low initial viscosity and no traces in construction adjustment, and after the film is thoroughly evaporated, it will maintain a moderate viscosity, so that the paint and the car coat can be tightly fitted. Therefore, the coating factory should choose the high-quality glue that has been verified by the market and developed for the TPU car coat to reduce or avoid the possibility of tearing off the film and leaving the glue.
- Retention possibility4
Improper glue ratio
If the glue used by the manufacturer is a brand and model that has been verified by the market, but there is still a large area of glue, the reason for considering is that the glue ratio of the coating plant is improper.
When the adhesive force between the glue and the substrate is smaller than the adhesive force of the glue and the paint surface, it will also cause a large area of glue.
- Treatment method after large-area gelatinization
It has been found in practice that pouring hot water in the offset area to soften the residual glue, then spraying the sun film adhesive remover or asphalt cleaning agent, and applying flour and wearing gloves to carefully and slowly rub it off, which is a relatively safe way to remove it. At present, there are also special adhesive removers for paint masks on the market, but according to actual operations, it is found that the effect of mild formula adhesive remover is poor, and the obvious corrosiveness of the effect is too strong, which may cause damage to the original paint surface.
Note: The root cause of the coating is the adhesive layer, which is not related to the substrate. The essential reason why the car clothing made of PVC and TPH materials is easy to retain glue in a large area is that the inferior substrate is usually used together with the inferior glue, and the weather resistance of the substrate and the glue is poor.
