The next afternoon, the testing center indeed received more than a dozen boxes of goods.

Han Chang opened the carton and saw the bulletproof fibers that Gao Yuan mentioned on the phone.

There are two types of models, namely bulletproof type and buffer type. They are placed in different boxes, and there are description documents in each box, which describes the performance characteristics in detail.

As the name suggests, buffer fibers are like sponges, which are used to slow down bullet impacts. The bulletproof fibers are thin and tough, with strong tensile and high temperature resistance, and the kinetic energy of the bullet cannot penetrate it.

Superimposing these two fibers can prevent bullet penetration, while also reducing huge impacts, forming a complete set of lightweight bulletproof equipment.

As for heavy-duty bulletproof equipment, hard plates need to be inserted in front and back of the bulletproof vest. This type of insert is made of metal and ceramic. There are many types, at least a dozen varieties.

There was once a video circulating on the Internet that a irritable American man spent 100 dollars to buy a cheap four-level insert made in China. The material is alumina, ceramic and polyethylene, and took it to the shooting range to blast the hammer.

At the beginning of the video, this guy looked down on Chinese goods. After all, it was so cheap. I guess he would be scrapped if he just made a few shots.

As a result, after AK and Mosinnagan fought, the plug board was still solid. The irritable man was surprised and never expected that the bargain from China was quite resistant to making?

So he continued to work hard, and fired two shuttles with the nine-mm pistol alone. After some torture, the insertion board was still firm as if it was opened.

At the end of the video, the irritable brother was completely speechless. He kept scratching his head, looking puzzled, and looked very funny.

It can be seen from this that the level of bulletproof insertion plates in my country is quite good.

However, soft body armor made of fibers is different, with higher technical requirements and greater difficulty.

Looking around the world, there are only two types of fibers that make bulletproof vests, aramid and polymer polyethylene fibers, referred to as PE for short.

As of 2020, my country's annual PE production has reached an astonishing 20 million tons.

Aramid fiber is monopolized by the three major factories in the world, namely DuPont, Japanese Democratic People, and Taihe New Materials from Yantai, my country.

Of course, as far as aramid is concerned, DuPont is still too powerful, accounting for more than 50% of the world's share. Compared with them, Diren and Taihe New Materials are just brothers. Although they work very hard, they can never defeat the arrogant DuPont.

We have all the raw materials used to make bulletproof vests, so we can occupy more than 70% of the world's share.

The sales of China's body armor are really huge, but as for some people, it is of course impossible for China's body armor to be invincible and even the US military is using it.

Because according to the Bailey Amendment, textiles used by the US military, as well as some shoes and boots, must be produced locally.

In short, what really makes the General Equipment Department worry is not the lack of bulletproof vests, but the lack of top bulletproof products.

Kevlar is essentially aramid, but it has made major technological improvements based on aramid fibers and added polymer coatings to overcome the problem of accelerated aging of ultraviolet rays.

There is also the third-generation bulletproof vest that is rumored to the world. At present, countries are still in the confidential research and development stage, but everyone knows that the third-generation bulletproof vest will definitely not be based on aramid, but on PE.

Then the question is, since we have 20 million tons of PE production capacity, isn’t it easy to build a third-generation bulletproof vest?

In fact, it is not easy at all, because the third-generation body armor will definitely not use ordinary PE. It is necessary to have top-grade polyethylene fibers with ultra-high molecular weight and ultra-high density to take on this important task.

This is like the one used on a construction site is called steel cable, and the interception cable on an aircraft carrier is also called steel cable, but they are not the same thing.

"Is this the bulletproof fiber of Kunlun Company? Can you catch up with Kevra?"

"It's hard to say, Kevlar is aramid, and this is X-fiber with a super honeycomb structure. The two have different molecular structures."

“It seems very light…”

"If it's so light, the molecular density shouldn't be particularly high, right?"

In the testing center, everyone was talking about it. There was a set of X-fiber warmth. Everyone knew this, but it was bulletproof? This was rather wild, and everyone was unsure.

Han Chang asked the goods to be sorted and classified and registered.

After the paperwork before the test was completed, the time was already pointing to 5:30 pm, and it was time to get off work and have supper.

But no one wanted to leave and stared at Han Chang.

Han Chang smiled and said, "It seems that if you don't try it today, you will have insomnia at night."

"Actually, I really want to know the performance of this fiber. Forget it, just go to the shooting range and get a national standard!"

When everyone heard this news, they were cheering.

Bulletproof fibers must be entered into the laboratory to test their pull resistance, corrosion resistance, heat resistance, etc.

But those tests were too troublesome and took time, so Han Chang chose a simple and crude method, directly use the gun and start the battle according to the national standards.

There are six levels of the national standard for bulletproof vests.

GA1 uses a Type 64 pistol, lead bullet.

GA2 type 54 pistol, lead bullet.

GA3 uses the Type 79 submachine gun, lead bullet.

GA4 uses the Type 79 submachine gun and steel bullet.

GA5 uses a Type 56 automatic rifle and steel bullet.

GA6 uses a Type 85 sniper rifle and steel bullet.

From level one to level six, one shot is shot according to the gun requirements, and the body armor can withstand it. Even if it meets the standards, this test is simple and rough, but it is closer to actual combat.

Han Chang touched his chin and said, "Kunlun Company's bulletproof fibers are quite special, including bulletproof and buffering. Let's test one plus one first."

One plus one means a layer of bulletproof fiber and a layer of buffer fiber.

The former is relatively tough, the latter is softer, the former is 2.5 mm thick, and the latter is 12 mm thick, and the total thickness is 14.5 mm, which is very close to the 18 mm thickness of the domestic three-level body armor.

However, due to the unique super honeycomb structure of X fiber, its weight is far lower than that of the traditional third-level body armor, which is only 850 grams, while the traditional third-level body armor weighs 3.3 kilograms.

Bang bang bang ~

These people in the test center are all veterans. After binding, one of them immediately fired with a gun, and the gun was a Type 64 pistol.

"Yes, I haven't even penetrated the first floor?"

"It is worthy of being the famous X-fiber, and it may reach level 3."

"The weight is only 850 grams. If you really can reach level 3, it will definitely be a huge improvement."

"Practice is the only criterion for testing the truth. You can return quickly and start the second round soon."

Hurry ~

The people around the target quickly retreated to the safety zone and hid behind the bulletproof glass. The gun-carrying shooter took two steps forward.

Bang bang bang ~

There were three more gunshots, and everyone ran to see them again.

"Although it was concave, the first floor was still not broken!"

"Strong enough, what are you waiting for? Start the third round quickly. If you can withstand Style 79, that's really awesome!"

After a moment, three more gunshots came, followed by huge cheers.

"My God, I really blocked it!"

"It's only 850 grams, and it can reach the third level standard. It's too powerful, right?"

"You can take a closer look. Style 79 has just penetrated the first floor, and there is still a lot of room for the second floor!"

Everyone observed carefully and found that although the bulletproof layer was broken, the bullet did not continue to penetrate deeper. After encountering the buffer layer, the kinetic energy attenuated and was quickly bounced away.

"Can this thing stand up to level 4?"

"Just one plus one, you can actually combine the fourth-level bulletproof vest? Isn't it a bit of a fantasy?"

"Don't you care about him, just try it!"

At this moment, everyone was extremely excited and they quickly retreated to the safe area.

The shooter took two steps forward again, raised his gun and fired.

Bang bang bang ~
Chapter completed!