Analysis: protective clothing type, performance requirements

During the COVID-19 epidemic, China has strengthened the management of the use of protective clothing during the epidemic. The demand for protective clothing is increasing and the whole country is in short supply. So do you know all the little things about protective clothing?

 

Classification of protective clothing

 

At present, in addition to head, hand and foot protective products, there are mainly three types of trunk protective clothing, operating clothing and medical protective clothing.

 

The term "isolation clothes" refers to the clothes worn by medical personnel on occasions such as when they touch patients or when their family members visit patients;

 

The operating garment refers to the specially designed clothing worn in the operating room;

 

Protective clothing refers to the clothing worn by personnel in special areas such as medical first aid, entering infectious disease areas and electromagnetic radiation areas.

 

According to different usage requirements, the three products should meet different performance requirements respectively. The isolation garment is a type I medical device with the lowest performance requirements. There is no industry standard or national standard in China. Operating clothes and protective clothing are the second type of medical equipment. In Accordance with YY/T0506 series standards, China has established research methods for the performance of operating clothes, and established technical requirements for disposable protective clothing for medical use in GB19082.

 

Here we mainly introduce the medical disposable protective clothing that meets the requirements listed in GB19082, which is also one of the most needed protective clothing in this epidemic. The product is intended for use by medical personnel who may come into contact with potentially infectious patients' blood, body fluids, secretions and airborne particles while working.

 

Performance of protective clothing

 

Performance requirements of protective clothing materials, including protection, wearability, safety and hygiene.

 

To put it simply: protective clothing not only to drain the wet air, wear freely, but also let medical staff from the diagnosis and treatment process virus, bacteria and other pollutants infection, resist water, alcohol, blood invasion, and effective antistatic, even prevent dust into.

 

To be specific: (1) The protective requirement has the function of liquid barrier, the key parts of the protective suit (left and right front, right and left arm and back) are impermeable water, and the hydrostatic pressure is not less than 1.67kpa; The penetrability of anti-synthetic blood is no less than level 2, that is, the synthetic blood shall not penetrate after acting on the protective clothing with pressure of 1.75kpa for 5 minutes; The outer side of the protective clothing is not less than level 3. This technical index is to prevent the patient's blood, or during the operation of the disinfectant water, wash liquid and other fluids through the protective clothing, contamination to medical workers.

 

(2) The protective clothing shall have the performance of preventing the penetration of micro-particles, and the filtration efficiency of the key parts and joints of the protective clothing shall not be less than 70% for non-oily particles. This is to prevent the invasion of virus-bearing particles (such as spitting), and the seams of protective clothing must be covered with sealing strips to hide the pinholes left by sewing.

 

(3) The wear requirements of protective clothing include adequate strength and dimensional stability. During the tensile test, the breaking strength should not be less than 45N and the breaking elongation should not be less than 30%. This technical index is to ensure the physical properties of clothing, so that it is not easy to damage.

 

(4) Regarding the wearing comfort of protective clothing, the moisture permeability of protective clothing material shall be no less than 2500g/m2·d. This technical index is to ensure that the wearer's sweating heat is expelled in a timely manner.

 

The safety and hygiene of protective clothing requires that it is non-toxic, has no skin irritation, and is resistant to mold breeding.

 

Protective clothing is disposable, economic requirements to ensure the protection performance at the same time, as far as possible to reduce costs.