Do you still use primer for car bumper painting?

It is recommended to spray primer, and the general car bumper painting is 3 layers of paint, primer + color paint + surface varnish. In order to save, you can spray one less layer, but safety comes first.

Car paints are generally baked paints. In the depot, after the frame and body are welded (and sometimes repaired by hand), the next process is painting. In general, the first is the primer.

Dip the bare car shell into a syrup-like paint tank and remove the drying primer; Then send it to the dust-free workshop and spray the paint with the electrostatic spraying process. It is then dried at a temperature of around 200 degrees. If you are elegant, you will apply another layer of varnish.

In this way, the painting process is complete.

Ordinary paint, metallic paint, pearlescent paint. No matter what color paint is, its pigment will fade in the sun. In fact, not just paint, anything with color can fade in the sun.

Painting a car can be roughly divided into the following processes: putty scraping, grinding, painting, grinding surface particles, waxing and polishing, etc.

Bumper is a representative auto spare part of auto parts, and PP plastic has become the preferred choice of bumper material because of its good processing performance, heat resistance and easy recycling. In the field of spraying PP plastic bumpers, the paint is difficult to oil, and the problem of paint peeling in the 100-grid adhesion test has become a problem that plagues the quality of coating.

PP plastic is an inert and non-polar material, with high crystallinity, strong intermolecular force, low surface tension, and poor interlayer adhesion between the surface of the substrate and materials containing polar functional groups or polar components such as paint coatings. In addition, the influence of different injection molding processes on its adhesion is excluded, so the key problem that needs to be solved when spraying to improve the adhesion of paint on the surface of PP plastic substrate is also an important factor to solve the problem of paint peeling.

The PP treatment agent developed by Jiongsheng treatment agent is an adhesion promoter in the form of primer, which is simply a chemical bridge for adhesion between paint and PP plastic, through spraying and plastic surface, forming a dense film layer, improving the polarity and wetting performance of the substrate surface, and combining with paint to form a chemical bonding force, two-pronged, interacting with each other, promoting the firmness between the paint film and the substrate, so as to solve the problem of PP plastic bumper paint peeling.

The conventional method for testing the adhesion performance of the coating after the enhanced adhesion of the coating is through the scratch test, the industry, which follows the standard is GB T 9286-1998 "Scratch Test of Pigment and Varnish Paint Film", and the coating 100 grid adhesion test after the surface treatment of PP treatment agent is fully in line with the standard. Hope!

The bumper should be primed.

Normally, when the front bumper of the car is scratched to reveal black, it means that the scratch is more serious and has damaged the base paint, and this situation can only be repainted. For example, if the scope of paint scratching is small, there is still no need to spray paint to solve the problem, but only need to carry out the corresponding paint repair operation to solve the problem. Let's take a look at how to do it in order to spend the least amount of money to solve the problem of paint scratching.

Method 1: If the degree of scratching is not too serious, and the scratching range is small, there is no need to go to the auto repair shop to repaint, after all, repainting will damage the original paint of the vehicle, which has a great impact on the depreciation of the car. In this case, the owner can buy some small stickers to paste on, after all, the front bumper of the car is mostly made of plastic, even if there is a phenomenon of scratching off the paint, it will not cause rust, etc., so you only need to use a small sticker to cover up the paint scratches.

Method 2: The car bumper is scratched to reveal the black primer, and the scratching will affect the appearance of the car, at this time, a relatively simple method can be taken to solve it. For example, first buy a touch-up paint pen online, then clean the scratched part of the car paint, and after there are no remaining stains and water traces on the surface of the scratching position, finally use the touch-up pen to gently apply the scratched part of the paint, so that the black primer exposed on the scratched part can be covered.

In fact, many of the scratching problems of the body are basically dealt with a touch-up pen, after all, it is economical, and a touch-up paint pen is only a few dollars in cost.

Method 3: When the car bumper is scratched to reveal the black primer, and the car paint scratches a large area and has a certain depth, the owner needs to do a simple paint repair job. For example, you can go online to buy a set of touch-up paint sets, which contain clay, sandpaper, self-spraying paint, etc., and follow the tutorial to operate the touch-up paint **, which can also deal with the exposed parts of the scratch.

Usually a set of paint kits cost about 50 yuan, which is definitely a more economical operation compared with going to the 4S shop to spray paint, you must know that the cost of painting on a side of the 4S shop starts at 150 yuan!

Method 4: When the car bumper is scratched to reveal the black primer, and the scratch is very serious, the vehicle must go to the 4S shop for painting, in fact, the owner can also enjoy the benefits of free painting. For example, when buying insurance for a car, many insurance companies will basically give away 1-2 sides of spray paint, and this paint service is completely free, and more importantly, even if the car owner uses the paint service, it will not be counted into the insurance claim.

Therefore, when there is a scratch on the vehicle and needs to be painted, the owner can take advantage of this opportunity and enjoy the free painting service of the insurance company.

To sum up, when the car's paint appears scratched to reveal black, if you learn the above 4 commonly used treatment methods, you will basically no longer be worried about the high cost of painting, if you feel that these treatment methods are useful, you might as well try it!

It must be sprayed with primer, although the bumper is a plastic part, but the plastic part he also has to have confidence, the role of the bottom gas is not in its other or rust prevention and other rust prevention, these words belong to the primer or an important property of isolation, but there is a very important job, everyone ignores the confidence. There is a certain grip between the topcoat and the topcoat, if you don't spray the primer, spray the topcoat directly, the paint will be sprayed up, the topcoat is very related, and it will soon enter the glass and fall off piece by piece.

The original bumper is already painted at the factory and does not need to be painted again. At present, there are two types of bumpers on the market: original and original cars. The original bumper refers to the direct supply of the original factory, and the original car bumper is basically manufactured by the auxiliary factory, and even some are produced by other small workshops.

Advantages of the original bumper:

1. In terms of front toughness, it is very difficult to deform even under high-intensity pressure. Secondly, because it is directly supplied by the original factory, it is naturally better guaranteed in terms of quality. Although the price is more expensive, the bumper is a kind of safety component after all, and the money is still worth spending;

2. The new bumper is not painted, most likely because it is not the original bumper. If you take the source of goods in the auxiliary factory or some small workshops, it is generally sprayed in the later stage (only containing primer), which is naturally not as stable as the original assembly line;

3. After all, the original paint is integrated in the paint baking room above 200 degrees in the factory, and the gloss and durability are basically better than the ordinary late painting. Of course, after replacing the bumper, be sure to check the logo or original label on it, and believe that you don't necessarily want to let the profiteers be deceived in the dark.

Photo by Lin Hong) @2019