The sample of yesterday's experiment was hung on the laboratory bench by Zhang Xiaofan very casually, and then when he went to work the next day, many people gathered around the model, everyone kept discussing, and then pointing.

Zhang Xiaofan easily pushed aside the crowd of onlookers, and then approached the model to ask the technician next to him.

"Have you tested the performance?"

"Not yet, we just looked at its surface properties from the level of the level, can only say that it has reached the passing line, and there are even many people who feel that it has not even reached the passing line, let alone something similar to gloss. ”

I just nodded, and then I picked up the sample very casually, walked around the crowd and stood by the window, looking at the sample from different angles.

Paint technicians observe the sample from different angles, first the line of sight is at right angle to the model, then slowly change the angle between the two, and finally the line of sight is parallel to the model.

At right angles, the main focus is on color, at 45 degrees the main focus is on gloss, and when it is slowly approaching zero, the main focus is on flatness.

If this sample is compared with the model completed by baking, it can only be said to be completely unqualified, whether it is flatness and color gloss, it is inferior to the baked powder coating.

"This one actually doesn't look much different from the paint surface brushed with a brush, it's potholed and ugly.

In this way, you first take it to test the physical properties and the chemical properties. ”

The appearance can be improved slowly, but the most important thing now is to test the physical and chemical properties.

Because the essence of paint is anti-corrosion and anti-rust.

When it comes to the most important uses of coatings, the first is definitely anti-rust, the second is anti-corrosion, and the third is aesthetics.

The third station doesn't matter, because this degree of beauty is indeed a bit unbearable for Zhang Xiaofan, it is very average, and even lower than people's minimum standards.

The first and second uses, then they have to test their physical and chemical properties to determine whether the coating is qualified?

The first test is adhesion, which is one of the most important properties of coatings.

The easiest way to detect it is the 100-grid method, which has a simple tool called the 100-grid knife.

It is within the range of one square centimeter, use a hundred grid knife to draw horizontally and vertically on the coating film, draw out a hundred small grids, and then glue it with transparent glue, quickly tear it apart, and then carefully count how many pieces of coating mold will be torn off.

In fact, this method is not very accurate, because the transparent glue is good and bad, and when it is glued, some will press hard to make its adhesion stronger, and some will just gently stick to it, and then tear it apart, then there will be a difference.

Since there are differences, the test results are naturally a little substandard.

However, in the paint industry, it is generally believed that no matter what kind of transparent glue you use, no matter how much pressure you have, as long as the 100 small grids do not fall, then the adhesion of the paint can basically be trusted.

The chemical properties are to test its corrosion resistance, of course, this time is relatively long, but what Zhang Xiaofan wants to know most is that if there is no problem with adhesion and adhesion, the chemical properties will generally not be a problem, and if there is a problem, it can be slowly improved.

To test adhesion, this technician who has only been in the industry for a few days can easily detect it, so they will soon turn around, and then report the results to Zhang Xiaofan.

"Mr. Zhang, the three of us have each carried out the test, using three different transparent tapes, and then there are two first-level and one second-level. ”

The zero level and the first level and the second level mentioned here actually refer to the hundred small grids drawn by the hundred grid knife, the zero level refers to the intact, the first level refers to the one hundred small grids, and a small grid is torn off, and the second level is to drop two grids.

In this case, many people think that it can be used as level zero, and some people think that it should be used as level 1.

If it is an ordinary powder coating product, that is, a powder coating cured by baking, then according to the testing standards of Zhimei new materials, only grade zero is qualified, and when it comes to level 1 and 2, this is absolutely unqualified.

But now this powder coating is more special, because its fixed line is cured at room temperature with accelerator, so even if it is three or four grades, Zhang Xiaofan thinks that this is qualified.

At least compared to paint, this is already more qualified, this is not Zhang Xiaofan's boast, the paint cured at room temperature, in fact, the adhesion is relatively poor.

Since the adhesion performance is relatively perfect, it also proves that the powder coating that can be cured at room temperature developed during this period is very successful.

Zhang Xiaofan also knows very well that once this coating is announced, it will be tantamount to an earthquake for the powder coating industry.

Powder coatings that can be cured at room temperature are scary to think about.

Because this can greatly reduce the energy consumption in the curing process of powder coating, it can reduce the cost of powder users a lot.

This can be said to be a technological revolution, at least once many powder coating people hear, what kind of coating can be cured at room temperature, no matter what means, they will think that this is an epoch-making technology.

However, Zhang Xiaofan has no intention of announcing it now, because there are too many restrictions on this powder coating now, and it is impossible to count them on one finger.

It can be said that it is just a laboratory product, and it needs to be industrialized, and there is still a long way to go.

The first is how to enable users to accurately measure the proportion between the three, what kind of standards do water need to have, can it contain minerals, can it use tap water?

What are the standards for solvents? Are ketones or ethers used?

How is the ratio of water and solvent determined, and how is the ratio of solution and powder coating used?

Water is easier to solve, because Zhang Xiaofan and they use tap water, but this solvent is more difficult to solve.

Do you have users go to a paint shop and buy solvents, so why don't they just use the paint? Do you have to spend hundreds of dollars on one of your equipment to spray?

It is important to know that paint coating is relatively simple, a brush or a roller can be painted, and the effect is not too bad.

But what I did this time is very meaningful, it is simply the meaning of going from zero to one.

However, with this level of powder coating, it is already possible to test the machine, what flaws there will be - and what needs to be improved.

Therefore, Zhang Xiaofan asked the technicians to prepare a lot of samples, so that each technician could personally test what the machine could do better, and then let Professor Qin and them also experience it for themselves. You have to find the latest chapters by yourself to read books?