In the afternoon of the next day, the test center received more than a dozen boxes of goods.

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

There are two types of models, bulletproof and cushioned, which are placed in different boxes, and each box also has a description document, which describes the performance characteristics in great detail.

As the name suggests, cushioning fibers are used to slow down the impact of bullets like sponges, and bulletproof fibers are thin and tough, and have strong tensile and high temperature resistance, which cannot be shot through by the kinetic energy of bullets.

Stacked on top of each other, these two fibers prevent bullet penetration while also cushioning huge impacts, creating a complete set of lightweight ballistic equipment.

As for heavy bulletproof equipment, it is necessary to insert hard plates in the front and back of the body armor, which are made of metal and ceramic, and there are many types, at least a dozen varieties.

There was a video circulating on the Internet of a grumpy American guy who bought a cheap four-stage plug board made in China for $100, made of alumina plus ceramics and polyethylene, and took it to the shooting range to blast the hammer.

At the beginning of the video, this old brother looks down on Huaxia goods, after all, it is so cheap, it is estimated that it will be scrapped if he does two shots.

As a result, after AK and Mosin Nagant fought, this plug-in board was still strong, and the grumpy brother was surprised, he never expected that the bargain from Huaxia was actually quite resistant?

So he continued his efforts, and the nine-millimeter pistol alone hit two shuttles, and after some torture, the plug board was still strong as if it had been opened.

At the end of the video, the grumpy brother was completely speechless, he kept scratching his head, looking puzzled, looking very funny.

It can be seen that the level of China's manufacture of bulletproof inserts is quite good.

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

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

As of 2020, China's annual PE output will reach an astonishing 20 million tons.

The aramid fiber is monopolized by the world's three major factories, namely DuPont in North America, Teijin in Japan, and Taihe New Materials in Yantai, China.

Of course, as far as aramid is concerned, DuPont is still too strong, accounting for more than 50% of the global share, and Teiren and Taihe New Materials are only younger brothers compared to them, although they work very hard, but they have never been able to defeat the invincible DuPont.

We have all 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 large, but as for some people saying that Huaxia body armor is invincible, even the US military is using it, of course it is impossible.

Because according to the Bailey Amendment, the textiles used by the U.S. 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 absence of top-of-the-line bulletproof products.

Kevlar is aramid in nature, but it has undergone significant technical improvements on the basis of aramid fibers and added a polymer coating to overcome the problem of UV-accelerated aging.

There is also the third-generation body armor that is rumored in the rivers and lakes, and at present, countries are still in the stage of secret research and development, but everyone knows that the third-generation body armor will definitely not be based on aramid, but on PE.

Then the question arises, since we have a production capacity of 20 million tons of PE, wouldn't it be easy to build the third generation of body armor?

In fact, it is not easy at all, because the third-generation body armor will definitely not use ordinary PE, and it must have ultra-high molecular weight and ultra-high density of top-level polyethylene fibers to take on this heavy responsibility.

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

"This is the bulletproof fiber of Kunlun? Can you catch up with Kevlar? ”

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

"It seems light..."

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

In the test center, everyone talked about it, there is a set of X-fiber warmth, which everyone knows very well, but it can still be bulletproof? This is a relatively wild road, and everyone has no bottom in their hearts.

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

When the pre-test paperwork was done, the time had already pointed to half past five in the afternoon, and it was time to leave work for dinner.

But everyone had no intention of leaving, staring at Han Chang.

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

"Actually, I really want to know the performance of this fiber, forget it, go directly to the shooting range, and make a national standard!"

Hearing the news, everyone immediately cheered.

Bulletproof fibers have to go into the laboratory to test for tensile performance, corrosion resistance, heat resistance and so on.

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

There are six levels of the national standard for body armor.

GA1 with a Type 64 pistol, buckshot.

GA2 with Type 54 pistol, buckshot.

GA3 with Type 79 submachine gun, buckshot.

GA4 with Type 79 submachine gun, steel bullet.

GA5 with Type 56 automatic rifle, steel bullets.

GA6 with Type 85 sniper rifle, steel bullets.

From level 1 to level 6, according to the requirements of firearms, one shot, body armor can resist, even if it meets the standard, although this set of tests is simple and crude, but it is closer to actual combat.

Han Chang touched his chin and said: "Kunlun's bulletproof fiber is relatively special, there are two kinds of bulletproof and cushioning, so let's test one plus one first." ”

One plus one means a layer of bulletproof fibers, plus a layer of cushioning fibers.

The former is tougher, the latter is softer, the former has a thickness of 2.5 mm, and the latter has a thickness of 12 mm, adding up to a total thickness of 14.5 mm, which is very close to the thickness of 18 mm of domestic third-class body armor.

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

Bang bang bang~

These people in the test center are all veterans, and even if one person shoots with a gun, the gun is a Type 64 pistol.

"Okay, you haven't even penetrated the first layer?"

"It's worthy of the famous X-fiber, but it's hard to reach level three."

"The weight is only 850 grams, and it is definitely a huge improvement to be able to reach the third level."

"Practice is the only criterion for testing the truth, so you should quickly retreat and start the second round immediately."

Boom~

The people around the target hurriedly retreated to the safe zone, hiding behind bulletproof glass, and the shooter with the gun took two steps forward.

Bang bang bang~

Three more gunshots rang out, and everyone ran to see them again.

"Although it is sunken, the first layer is still not broken!"

"Strong enough, what are you waiting for? Hurry up and start the third round, if you can resist the 79 type, that's really awesome! ”

A moment later, three more gunshots rang out, followed by loud cheers.

"Oh my God, it's really in the way!?"

"It's only 850 grams, so it's too strong to reach the third-level standard, right!?"

"Look closely, Type 79 has only just broken through 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 was not able to continue to go deeper, and after encountering the buffer layer, the kinetic energy attenuated and was quickly bounced off.

"Could it be that this thing can still resist the fourth level?"

"It's just one plus one, and you can actually combine four-level body armor? It's a bit of a fantasy, right? ”

"Whatever, just try it!"

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

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

Bang bang bang~