How to choose the thickness of the car coating film?
When car owners put on the invisible car clothing, they always feel that the thicker the car coating film, the better, and each car coating film brand often has specifications of different thicknesses, and the thicker the price. Is it true that the thicker the coat film, the better? How thick is it?
1. The thickness of the car coating film
The car coating film is mainly composed of coating, TPU substrate and glue, of which the TPU substrate accounts for 70%, so the thickness of the car coating film is mainly determined by the TPU substrate.
In terms of specifications, the common thickness of car coating film is mainly 6.5mil/7.5mil/8.0mil/8.5mil/9.5mil, and even 10mil and other thicker.
Tips：
The mil Chinese name here is mil, is a unit of length, representing thousandths of an inch, 1mil = 0.0254mm, 2mil is equivalent to the thickness of a piece of A4 paper, so it is difficult to distinguish the different thickness of the car coating film with the naked eye, and a professional thickness gauge should be used when measuring.
2.The thicker the coating film, the higher the protection
"The thicker the car coating film, the higher the protective performance" The first thing to emphasize is that the premise of this sentence is the same series of products of the same brand, or the TPU substrate, coating, glue and other materials used are of comparable quality. Even if the thickness is thicker, the performance of the car coating film made of inferior materials is not as good as that of the high-quality car coating film.
A chopstick is easy to be broken, ten pairs of chopsticks are difficult, the same reason, when other conditions remain the same, the thicker the thickness, the larger the cross-section, the greater the resistance to external damage, the more superior the protection performance such as scratch resistance and wear resistance.
3. The thicker the coat film, the better? No!
The tensile strength of the car coating film is directly proportional to the thickness, so during construction, the thicker the car coating film is more laborious when stretching, the worse the workability, and the more the level of the film applicator is tested.
At the same time, due to the increase in thickness, the stiffness of the coating film increases accordingly, and the ductility decreases, and if a material with poor ductility is used, the corners are more likely to warp and degum over time.
Therefore, the increase in thickness requires higher physical properties of TPU substrates, and it is necessary to balance the properties of elasticity, tensility, ductility, toughness and other aspects.
4.How to choose the thickness of the car coating film?
If the car coating film is too thin, the protective performance will be reduced, and if it is too thick, it will increase the difficulty of construction and the risk of warping and degumming, what thickness is the most appropriate?
According to the actual application of the car coating film and the manufacturer's test data, the characteristics of each thickness of the car coating film are summarized as follows, which can be referred to when selecting:
● 6.5mil: The film cloth is slightly thinner, the protective performance is average, it is an entry-level economic product, covering a wider range of models;
● 7.5mil: the mainstream model in the current market, which has been verified to have a relatively balanced protection performance and construction performance, and the price is relatively moderate;
● More than 8mil: the membrane cloth is thicker and has strong protection performance, but the construction requirements are higher; The matching degree of the base film and glue is also required to be high, and there may be risks such as degumming and warping in the later stage of improper material selection.
The substrate plays a core role in scratch resistance, friction resistance, stretch resistance and other core characteristics, when choosing a car coating film, we must look at the quality of the TPU substrate.
