Just as the three of them were talking, the technical students entered the office one by one.

Everyone held a sample in their hands, which was the result of their experiment in the past half hour.

Li Wei took out the professional magnifying glass next to him again, and he wanted to see the surface effect.

Why is this paint called anti-graffiti?

This has a very strong connection with its surface effect.

We all know that cement floors are rough and delicate.

Although both are cement floors, both of them are incomparable in appearance, color, or cleaning and cleaning ability.

The same is true for paint products. Sometimes you find that although the colors are the same, the inner structure and surface properties are different.

How to paint polyurethane? Because its surface is very dense, it has the function of anti-graffiti.

Or use cement floor as an analogy.

If dust falls on the smooth cement floor, you can sweep it clean with a broom.

But if it is similar to the concrete floor of the road surface, not to mention dust or very small stones, it may fall into the crack and cannot be swept out.

This is the principle of anti-graffiti.

Graffiti is actually a kind of painting, and of course it mainly happens to children.

When painting, you must use a pen, whether it is a ballpoint pen or a signature pen.

It is actually a kind of ink. If the surface is very lethal, then its ink cannot penetrate under the surface.

Graffiti on this paint, you can wipe it clean with a rag.

So what Li Wei is observing now is its surface density.

Because its surface is very dense, its luster is relatively high.

Li Wei used a gloss meter to measure it and found that his gloss is 117 degrees.

This is still very ordinary.

The surface looks as smooth as a mirror, and Li Wei's entire face can be reflected.

However, if it is made with a large production machine, it will have a higher gloss and a better density.

Speaking of this, I have to say that a paint is called dry-mixed matte paint.

This name is only found in powder coatings, and there is no such name in paints because of dry mixing.

The paint is wet!

Dry-mixed matte coatings actually use the different reaction speeds of the two different components of the coating molecules to form a structure similar to the crossing of hands.

So the light is scattered on it, and the matte surface is formed.

The surface of this anti-graffiti paint is like a mirror, so most of the light is reflected, and a very small amount of light will cause scattering.

This also causes the paint to look very bright on the surface.

So if you want to have an anti-graffiti effect, you must be very bright and very bright.

Glass, gloss plastics, and stainless steel, these actually have anti-graffiti effects.

Li Wei pushed the equipment and sample to He Qian.

"You can also see if there is any way to improve it?"

To be honest, Li Wei is not very satisfied with the superficial meticulousness.

Maybe the degree of melting and kneading is not enough.

"Are you only using imported polyurethane?"

"The finished product made from imported polyurethane is indeed much denser than this one.

However, we need to consider the cost issue. The amount of this paint itself is small in China because it is expensive!

So we have to find a way to reduce its cost.

See if it can be made into one of our regular products.”

"Why do you change the color?"

"What kind of damage are you doing?

Colors are never decided by us, and we will adjust the colors of the customer request.

This will never change in the powder coating world.”

Li Wei was also thinking that he actually hoped for He Qian. Many times, although He Qian's method is not eye-catching enough, it is often the most realistic.

Especially in his ordinary paint field, problems can be solved many times.

"Change the screw!"

There is no other way at the moment, so I can only start from the machine.

Or further urge upstream manufacturers to improve polyurethane.

However, the demand for polyurethane in China is very small, so the polyurethane formulas of these manufacturers must be from more than ten years ago. These formulas were eliminated from abroad, so it is unlikely that they can invest huge amounts of money to study.

They will only be willing to invest huge investment in research unless the demand in the market increases.

Adjusting the extruder screw is to change the coating performance from a physical perspective.

It's a little simpler and clearer.

That is, the coating raw materials are mixed more evenly.

Disassembly is a technical job.

First of all, you have to clean up the residual material in the machine, otherwise the screw will not be pulled out.

Li Wei was guiding him, while He Qian was working.

"Two sections feed, two sections have a 45-degree angle, and the rest are all at 90-degree angle."

He Qian adjusted his position very carefully, which was a very meticulous job. Not to mention that technicians are many mechanics who repair machines, sometimes they are prone to misalignment.

A twin screw is not like a single screw. Once a thread of one section is misaligned, it will not be able to operate after being installed.

The two of them did not notice a pitiful person next to them.

"Boss, what should I do with my model?"

"You ask He Qian, there is no way to make this paint for the time being."

"Why?"

Li Yuan always thought that his boss was very skilled, and basically no paint could be used to defeat him.

But now he said there was nothing he could do.

Then what do you want him to do?

He praised Haikou with his customers and could definitely do it.

He Qian stopped the work in his hand because the screw had been installed by him. He grabbed the rag next to him and wiped the oil on his hand clean.

Then he came to the pool and rubbed his hands with washing powder while saying.

"The sample you brought back is first of all, it is paint, it is not powder coating, you have to figure it out.

The amount of silver powder added here is definitely more than 10%.

Do you know what this is?”

Li Yun shook his head angrily and looked at He Qian with dissatisfaction.

You have been sleeping in the same dormitory with me for so long, and have been working with me for nearly two years. Don’t you know who I am?

I only have some understanding of technology in the first half of the year, but the problem with a little depth is that the monk is 2012 and cannot touch it.

"Our current technology adds aluminum and silver powder at most 4%.

So the effect is completely unattainable, at least it does not have this metallic feeling.

The boss means, wait a little longer!

Wait for the technology to mature, or we develop it ourselves.

Of course you can also call your customers, it is better to use paint."

Li Yuan turned his head and looked at Li Wei again.

“We don’t have equipment!”

"Why don't you buy one?" Li Yuan said in a controversial tone.

“It’s more than 1 million!”

Li Yun was frightened and looked at Li Wei with some anxiety in his heart, for fear that he would scold him.

Why is it so expensive?

That is equivalent to the sum of the prices of all the company's machinery and equipment.

It would be better to double the size of the company and make much more money.

"Then forget it, forget it"

"Forget it, you must buy it. The current technical level of domestic products is not up to standard. I still have to find channels now, otherwise the price will be more expensive."

Thank you for your recommendation votes and rewards
Chapter completed!