Many people have been locked up in the community in the recent epidemic counterattack, living a "captive" isolation life of eating, sleeping and doing nucleic acid at all times. Strangers as like as two peas were seen in the same costume.
Can such a seemingly simple protective clothing safely protect the staff inside? What material is used to make such a powerful effect?
Today we'll take you to explore the secret of protective clothing!

Types of protective clothing
In addition to the "big white" we usually see, there are other types of protective clothing: medical protective clothing can be divided into woven, nonwoven and composite materials according to the organizational structure of the fabric; According to the service life, it can be divided into disposable type (one-time use), limited time type and reusable type; According to the processing composite technology, there are three kinds of methods: finishing, coating and coating. In recent years, some scientific research institutions and enterprises have developed many medical protective clothing, most of which take nonwovens as the main fabric.
The reusable protective clothing should be washed and disinfected after each use. The operation is inconvenient, which greatly limits its weaving structure, and its protective performance decreases after use for a period of time. In view of this, protective clothing made of disposable non-woven (non-woven) materials is gradually adopted internationally. After further antibacterial and antistatic treatment, the feel and performance of this protective clothing are close to those of traditional textiles, and the price is low. Therefore, it is widely used in isolation clothing and protective clothing in the medical field.
The "big white" we usually see is wearing disposable protective clothing, so many medical staff dare not eat or drink, just to save protective clothing, so they can't use it again after taking it off.

Protective clothing material
The ideal medical protective clothing should be multifunctional. It should not only protect medical staff from toxic and harmful liquids, gases or infectious viruses and microorganisms, but also be comfortable to wear. While it has barrier performance, it should also have air permeability, antibacterial and anti sensitization, and should not endanger human health. In addition, the selection of protective clothing fabrics should also consider the cost and environmental protection after abandonment. The above reasons promote the use of non-woven materials to make protective clothing.
Protective clothing has different properties due to different raw materials. At present, the nonwoven materials used in several medical protective clothing being sold and developed in the domestic market mainly include the following.
01 polypropylene spunbonded fabric
Polypropylene spunbonded cloth can be processed into antibacterial protective clothing, antistatic protective clothing, etc. Compared with the traditional cotton protective clothing, polypropylene spunbonded protective clothing is undoubtedly a great progress. Because of its low price and one-time use, it can greatly reduce the cross infection rate. It has been widely promoted abroad for a long time. However, the anti hydrostatic pressure of the material is relatively low, and the blocking efficiency of virus particles is also relatively poor. It can only be used as general protective articles such as sterile surgical clothes and disinfection bags.

02 polyester fiber and wood pulp composite Spunlaced cloth
The material feels soft, close to traditional textiles, and can be treated with three anti-alcohol, anti blood and anti oil, anti-static and antibacterial γ X-ray disinfection is a better material for medical protective clothing. However, its anti hydrostatic pressure is also relatively low, and its blocking efficiency against virus particles is also relatively poor, so it is not an ideal protective clothing material.

03 polypropylene spunbonded melt blown spunbonded composite nonwovens
Polypropylene spunbonded melt blown spunbonded composite nonwovens, namely SMS or SMMs. Melt blown cloth is characterized by fine fiber diameter, large specific surface area, fluffy, soft, good drapability, low filtration resistance, high filtration efficiency and strong hydrostatic pressure resistance, but low strength and poor wear resistance, which limits the development of its application field to a considerable extent. The linear density of spunbonded fabric fiber is large, and the fiber web is composed of continuous filaments. Its breaking strength and elongation are much larger than that of melt blown fabric, which can make up for the deficiency of melt blown fabric. This material has the following excellent characteristics:
① Uniform and beautiful appearance;
② High hydrostatic resistance;
③ Soft feel;
④ Good air permeability;
⑤ Good filtering effect;
⑥ Strong acid and alkali resistance.
In addition, it can also carry out three anti - SMS (anti alcohol, anti - blood, anti - oil) and antistatic, antibacterial, anti aging and other treatment to meet the different needs of the nonwovens.

04 polymer coated fabric
There are many kinds of coatings used for protective fabrics, including polyvinyl chloride, polyethylene, polychloroprene rubber and other synthetic rubber. This kind of protective clothing has very good waterproof and blocking bacterial particles, and can be reused. However, its moisture permeability is poor, a large amount of sweat of human body cannot be discharged, and its comfortable performance is poor. The protective clothing using rubber coated fabric in SARS period is really a last resort. The new progress at home and abroad is to use microporous polytetrafluoroethylene film and fabric to obtain waterproof and breathable function, but it is expensive as a disposable product.

05 polyethylene breathable film / nonwoven composite fabric
According to the different requirements of protection grade, the nonwovens and films used are also different. Polyethylene breathable membrane / nonwoven composite material has excellent effect on blocking bacterial particle penetration and liquid penetration, and the hand feel can be adjusted by changing the softness of the composite fabric. It has strong tensile strength, good air permeability, greatly improved comfort performance, can withstand disinfection treatment, does not contain toxic components, weighs 60 ~ 100g / m2, and has good cost performance, The medical disposable protective clothing made of it can protect medical personnel from pollution sources, overcome cross infection and play an effective role in protection.

Sealing strip on protective clothing
When you see the blue stripes on "big white", did you ever think it was a zipper? In fact, it is not. These are medical protective sealing strips that ensure seamless and pinhole free protective clothing.
Not only the materials of medical protective clothing should be made of special chemical materials, but also the joints of clothing should be treated with professional adhesive strips, so as to effectively prevent the penetration of viruses from the joints and meet the standard requirements of professional protection of medical staff. Generally speaking, all joints of disposable protective clothing are bonded with non-woven hot-melt adhesive through ultrasonic, which makes the protective clothing seamless and pinhole free, enhances the tensile resistance of protective clothing joints, eliminates air leakage, water leakage and bacteria leakage at the joints, and is comfortable to wear.