The "white angels" who deal with blood, viruses, and bacteria every day are at high risk at all times. They protect the health of patients, and who is to protect their health?
To treat severely ill patients with new coronavirus pneumonia, do I need to consume 10 sets of protective clothing a day? Is the cost of a single piece of protective clothing close to three or four hundred yuan? Under the current situation of epidemic prevention and control, the image of "white angels" in protective clothing continues to be screened. However, protective clothing has also become one of the urgently needed materials for China's national defense epidemic. In this regard, researcher Jin Xiangyu of Donghua University explained in detail how protective clothing can achieve "three resistances and one resistance".
Water repellent, blood repellent, alcohol repellent + antistatic
Protective clothing must not only drain moisture and breathe, wear freely, but also protect medical staff from infections by viruses, bacteria and other pollutants in the diagnosis and treatment process, resist the intrusion of water, alcohol, and oil stains, and be effective antistatic, even Prevent dust from entering.
Due to the use of micro-nano-level medical protective non-woven materials, the basic requirement of protective clothing is "three resistance and one resistance", that is, water repellent, blood repellent, alcohol repellent and antistatic. Such composite materials can be composited by different materials, such as polyethylene/polypropylene spunbonded nonwoven fabric, composite with breathable microporous film or other nonwovens, or spunlace nonwoven composite with breathable microporous film, or Wooden paddle composite spunlace non-woven fabric.
It is worth noting that there are strict standards for several properties of protective clothing materials, including protection (tightness), wearability, safety and hygiene. Among them, the protective property requires liquid barrier function. The key parts of the protective clothing (left and right front, left and right arms and back positions) are equipped with impermeable water, and can withstand hydrostatic pressure not less than 1.67 kPa (kPa); resistance to synthetic blood penetration No less than level 2, that is, synthetic blood is applied to the protective clothing at a pressure of 1.75 kPa, and cannot penetrate after 5 minutes; at the same time, the outer side of the protective clothing is not less than level 3. In addition, it is necessary to prevent the penetration of micro-particles, and the filtration efficiency of non-oily particles at key parts and joints is not less than 70%.
For the wearability requirements, the protective clothing must have sufficient strength and dimensional stability. When the tensile test is performed, the breaking strength is not less than 45 N, and the breaking elongation is not less than 30%; in terms of wearing comfort, the protective clothing material has permeability Moisture requirements. The safety and sanitation require that it is non-toxic, non-skin irritation, and anti-mold.