The coating is a solid continuous film obtained by the one-time application of the coating, which is a thin layer of plastic coated on the substrate of metal, fabric, and plastic for the purpose of protection, insulation, decoration, etc.
2. How to classify coatings?
Invisible car coat coatings can be functionally divided into the following categories:
According to the repair time, it can be divided into room temperature repair, second repair, and hot repair;
According to the hydrophilic and hydrophobic properties of the coating surface, it can be divided into hydrophilic type and hydrophobic type;
According to the gloss of the coating, it can be divided into matte type, bright type, and matte can also be divided into low matte and high matte.
3. What is the core function of car coating?
As far as the coating is concerned, it needs to have comprehensive functions, such as stretchability, softness and hardness, anti-permeation performance, slip performance, repair performance, aging resistance, acid and alkali resistance, solvent resistance, hydrolysis resistance, all of which need to be present.
4. What is hydrophobic coating and hydrophilic coating? What is the difference?
Professional interpretation of the hydrophilic and hydrophobic function of the coating, mainly according to whether the water contact angle of the coating is greater than 90 degrees or less than 90 degrees, the water contact angle greater than 90 is called the hydrophobic coating; A water contact angle of less than 90 is called a hydrophilic coating. Whether it is a hydrophobic coating or a hydrophilic coating, it is water-repellent.
In the actual judgment, it should be accurately called oleophobic and lipophilic, which is a manifestation of the coating on oil-like substances.
Hydrophobic coating, oily things will collect and polymerize on the surface, not on the surface; The hydrophilic coating will not polymerize and is continuous, for example, the hydrophilic coating is drawn with an oily marker pen is a continuous line of the whole without breakage.
The monomers and formulations used in the production of coatings determine the properties of coatings, such as stain resistance, weather resistance, and gloss durability. The type of coating does not affect the functionality of the livery itself.
5. What is hard coating and soft coating? What's the difference?
It can be simply used as an index to represent the hardness and softness, and the so-called hard coatingThe soft coating mainly lies in the difference in elongation at break. An elongation at break of less than 85% can be defined as a hard coating, and an elongation at break of more than 90% is a soft coating (the highest elongation at break on the market can reach 180%-190%).
Hard coatings generally have two manifestations. First, it is easy to have fracture lines of the coating when stretching; Second, after the construction is completed, the surface is easy to have relatively dense obvious scratches, which need to be heated by external force to eliminate.
Hard coatings have better chemical resistance than soft coatings, and the harder the coating, the better its chemical resistance. For example, the harder the coating, the less likely the marker scratches will remain, and the easier it will be to wipe them clean. The soft coating has better repair performance, better tensile performance, and is easier to apply.
In the R&D and production of coatings, it is necessary to comprehensively consider the properties of coatings, not only to take into account the chemical resistance of hard coatings, but also to take into account the repair and tensile properties of soft coatings, and on this basis, it is necessary to strive to achieve a good balance point.
6. Why are corrosion resistance and repair incompatible?
Corrosion resistance and repair are relatively incompatible.
The harder the coating, the better the chemical resistance, but at the same time, the harder the coating, the smaller the elongation at break, which leads to a sharp rise in the temperature required for the coating during repair, and it may need to be heated by external force to achieve the repair function, so the performance of self-repair performance will be relatively inferior.
The corrosion resistance of the car clothing is mainly against acidic pollutants such as guano acid rain, and not all corrosive substances can be resisted, such as electroplating, painting, metal deep processing and other corrosion. On the basis of being able to resist corrosion such as guano acid rain, the coating of the car coat will be as soft as possible to take into account the repairability.
It must be clear that the invisible car livery has the function of protecting the car paint, but it does not mean that it is not bad, and the car livery cannot be over-deified.
7. What are the reasons for determining the brightness of the car coat?
The main factors that determine the brightness of the car clothing are as follows:
1) Craft
2) Compatibility between base film and coating
