The technological empire begins with polymer materials - Chapter 40 Bulletproof test!

On the afternoon of the next day, the testing center received more than a dozen boxes of goods.

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

There are two models in total, namely the bulletproof type and the cushioning type. They are placed in different boxes, and each box also has documentation that describes the performance characteristics in great detail.

As the name suggests, buffering fibers are like sponges and are used to slow down the impact of bullets. Bulletproof fibers are thin and tough and have strong tensile and high-temperature resistance. The kinetic energy of bullets cannot penetrate them.

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

As for heavy-duty bulletproof equipment, hard plates need to be inserted into the front and back of the body armor. These plates are either metal or ceramic, and there are many types, at least a dozen varieties.

There was once a video circulating on the Internet. A certain grumpy American man spent one hundred dollars to buy a cheap four-level plug-in board made in China. It was made of alumina, ceramics, and polyethylene, and used it to blast a hammer at the shooting range.

At the beginning of the video, this old man looks down on Chinese products. After all, they are so cheap and will probably be scrapped after just two shots.

As a result, after the battle between AK and Mosin Nagant, this plugboard was still strong. The grumpy old man was surprised. He never expected that the cheap goods from China were actually quite resistant?

So he kept up his efforts and fired twice with the nine-millimeter pistol. After all the torture, the flapper was still strong as if it had been opened.

At the end of the video, the grumpy old man was completely speechless. He kept scratching his head and looked puzzled. He looked very funny.

It can be seen that my country’s level of manufacturing bulletproof inserts is quite good.

However, soft body armor made of fibers is different, has higher technical requirements and is more difficult.

Looking around the world, there are only two types of fibers used to make body armor, aramid and polymer polyethylene fiber, referred to as PE.

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

Aramid fiber is monopolized by three major factories in the world, namely DuPont in North America, Teijin in Japan, and Taihe New Materials in Yantai, my country.

Of course, as far as aramid is concerned, DuPont is still too powerful, accounting for more than 50% of the global share. Compared with it, Teijin and Taihe New Materials are just younger brothers. Although they work very hard, they have always been There is no way to defeat the arrogant DuPont.

We all have the raw materials used to make body armor, so we can occupy more than 70% of the global share.

The sales of Huaxia body armor are really huge, but as for some people saying that Huaxia body armor is invincible and even used by the US military, that is of course impossible.

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

All in all, what really worries the General Armament Department is not the lack of body armor, but the lack of top-level bulletproof products.

Kevlar is essentially aramid fiber, but it has made major technical improvements based on aramid fiber and added a polymer coating to overcome the problem of accelerated aging by ultraviolet rays.

There is also the rumored third-generation body armor. Currently, various countries are still in the confidential research and development stage, but everyone knows that the third-generation body armor will definitely not be based on aramid, but on PE.

So the question becomes, since we have 20 million tons of PE production capacity, wouldn’t it be easy to make third-generation body armor?

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

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

“This is Kunlun Company’s bulletproof fiber? Can it catch up with Kevlar?”

“It’s hard to say. Kevlar is aramid, and this is X-fiber with a super honeycomb structure. The molecular structures of the two are different.”

“It seems very light…”

“If it’s so light, the molecular density shouldn’t be particularly high, right?”

In the test center, everyone was talking about it. Everyone knew that X-fiber was good at keeping warm, but it was also bulletproof? This is a relatively wild road, and everyone has no confidence.

Han Chang asked people to sort and classify the goods and register them.

When the paperwork before the test was completed, it was already 5:30 in the afternoon, and it was time to get off work and have dinner.

But no one had any intention of leaving, and stared at Han Chang eagerly.

Han Chang chuckled and said, “It seems that if you don’t give it a try today, you will all have insomnia at night.”

“Actually, I really want to know the performance of this fiber. Forget it, just go to the shooting range and hit the national standard!”

Upon hearing the news, everyone cheered.

Bulletproof fibers need to go to the laboratory to test tensile strength, corrosion resistance, heat resistance, etc.

But those tests were too troublesome and time-consuming, so Han Chang chose a simple and crude method, directly loaded the firearm and started shooting according to the national standard.

There are six levels of national standards for body armor.

GA1 uses Type 64 pistol and lead bullets.

GA2 uses Type 54 pistol, lead bullets.

GA3 uses Type 79 submachine gun, lead bullets.

GA4 uses Type 79 submachine gun, steel bullets.

GA5 uses Type 56 automatic rifle and steel bullets.

GA6 uses Type 85 sniper rifle and steel bullets.

From Level 1 to Level 6, if one shot is fired according to the requirements of firearms, and the body armor can withstand it, even if it meets the standard, this test is simple and crude, but it is closer to actual combat.

Han Chang touched his chin and said: “Kunlun Company’s bulletproof fiber is quite special. There are two types: bulletproof and cushioning. Let’s test one plus one first.”

One plus one means a layer of bulletproof fiber plus a layer of cushioning fiber.

The former is tougher and the latter is softer. The thickness of the former is 2.5 mm and the thickness of the latter is 12 mm. The total thickness together is 14.5 mm, which is very close to the 18 mm thickness of domestic level 3 body armor.

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

Bang bang bang~

These people in the test center are all veterans. After binding, there will be one person shooting with a gun, and the gun is a Type 64 pistol.

“Okay, you didn’t even penetrate the first layer?”

“As expected of the famous X-fiber, it might be able to reach level three.”

“The weight is only 850 grams. It will definitely be a huge improvement to reach level three.”

“Practice is the only criterion for testing truth. Please step back quickly and start the second round immediately.”

Wow~

People around the target quickly retreated to the safety area and hid behind bulletproof glass. The shooter with the gun took two steps forward.

Bang bang bang~

Three more gunshots were heard, and everyone ran to see again.

“Although it’s dented, the first layer is still intact!”

“Strong enough, what are you waiting for? Let’s start the third round now. If you can resist the 79 style, you are really awesome!”

A moment later, three more gunshots were heard, followed by huge cheers.

“Oh my God, it’s actually blocked!?”

“It only weighs 850 grams, and it can reach the third level standard. Isn’t it too powerful!?”

“Look carefully, the Type 79 has only just penetrated the first layer, and there is still a lot of room for the second layer!”

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

“Can it be said that this thing can withstand the fourth level?”

“Just one plus one, can you actually combine a level 4 body armor? Isn’t it a bit fantasy?”

“Whatever, you will know if you try it!”

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

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

Bang bang bang~

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