How about the anti-virus ability of medical protective clothing? What black technologies are there?

Protective clothing history

The history of protective clothing can be traced back to the Black Death in the Middle Ages.

At the beginning of the 14th century, a deadly plague broke out in Europe: the Black Death, which wiped out about 75 million Europeans within a few years, reducing the population of Europe by 50% at that time. It was like a snap of the fingers against the tyrants.

The highly infectious plague has alarmed people all over Europe, as well as doctors.

You should know that doctors have to face patients every day, and they have to find ways to protect themselves and reduce their chances of being infected with the Black Death as much as possible.

So in 1619, Charles Delome, a French doctor, invented a kind of clothes specially for doctors.

This dress is made of oily cloth dipped in wax and tallow. It tightly wraps the doctor from head to foot, and covers his hands with large gloves. He also wears a black wide hat brim on his head to hide his hair. The eye position of the mask is separated by glass. The mask of the beak contains cotton, mint, flowers and other substances, so that the air that the doctor can breathe in is filtered.

He also had a long stick in his hand to instruct the patient how to treat. He could also drive away the demons in the patient's body by whipping the patient, because people at that time believed that suffering from plague was God's punishment, and the patient could be saved from his original sin by whipping.

Although the protective equipment at that time was a little strange, it was undeniable that under the protection of this head to foot equipment, the infection rate of doctors was indeed controlled.

Modern protective clothing

Several hundred years later, with the continuous progress of science and technology, most doctors wear a black coat when performing surgery, which is considered to be an earlier medical protective clothing.

At that time, the purpose of wearing protective clothing for doctors was not to protect themselves from injury, but to prevent microorganisms from invading sterile operating rooms, protect patients from infection by bacteria carried by medical staff, and protect doctors' clothes from being contaminated by blood or secretions.

The early protective clothing was generally made of cotton, which was resistant to bacterial penetration in the dry state, but could not resist bacterial invasion in the wet state.

Later in World War II, the U.S. military developed a high-density woven fabric treated with carbon fluoride and benzene compounds to enhance its waterproof performance. Civil hospitals began to use these fabrics as the fabric of medical protective clothing after World War II.

Today's protective clothing is rich in design and function.

For example, the closed placket design, the front and middle zipper design are convenient to wear and take off, and the added wind deflector design can better increase the protective effect; The two piece cap design adopts elastic band technology to fit the face and increase the protection effect; The sealing process of suture rubber strip has better protection performance.

Because of this, it can discharge moisture and breathe freely, and wear freely. It can also protect medical staff from viruses, bacteria and other pollutants during diagnosis and treatment, resist the invasion of water, alcohol and blood, and it should be anti-static, even prevent dust from entering.

So, is the technological content of protective clothing high?

First of all, its technological content is still high.

The establishment of the protective clothing production line involves 21 links in the transformation of the production process. After one piece of protection is subject to the arrival of raw materials, it will go through 12 production processes until the production goes offline.

Taking sewing as an example, every 3 stitches/1cm of stitch distance, skipped stitches, missed stitches and uneven stitches are unqualified products. Because this is the basis of the airtightness of protective clothing, the process is complex and strict.

Due to the functional significance of protective clothing, the production and acceptance are more rigorous, and the details and pinholes will be detected, after all, to protect the lives of medical personnel.

Moreover, these things are disposable consumables. It is generally stipulated that each patient should be replaced with a new one, otherwise there is a risk of cross infection. Even if it is not replaced, it must be replaced every 4 hours, because the protection function is no longer available.

ending

In this war "epidemic" without gunpowder smoke, protective clothing can be said to be the "battle robe" of medical staff.

At present, the protective clothing produced in China is supplied to half the world, which is not a big problem. The production equipment, raw materials and other industrial chains of domestic protective clothing are relatively complete, but there is still a gap between the comfort of domestic fabrics and American products.

Li Lin, general manager of Anhui Fumei Medical Company, which produces protective clothing, told the Global Times that protective clothing made of fabrics produced by DuPont is lightweight, breathable and protective.

The domestic protective clothing has no problem with the virus barrier, but the problem is that it is not breathable. The medical staff feel very stuffy and uncomfortable after wearing it.

The "white men" wear it all day long. In hot weather, after working continuously for more than 10 hours, they will find that the sweat in the protective clothing cannot evaporate and condenses into water, and they are wet all over.

Take off the heavy protective clothing, the forehead is full of sweat, and the palms are white with foam.

Crucially, if you fart in this protective suit, you will be completely wrapped in the protective suit. With the squeezing of bending and standing up, you will continuously release it to the face through the neck. Can you imagine this?

So it is not easy for our "big white" people. On the other hand, it also shows that the technological power is the real power. There is still a gap between us. Let's fight!