Reduce The Cost Of Medical Protective Clothing, How To Achieve "Three Refuses To Resist"?

Every day, the "angels in white" dealing with blood, viruses and bacteria are always at high risk. They defend the health of their patients, and who will defend their health?

Is it necessary to consume 10 protective clothing per day for critically ill patients with new crown virus pneumonia? Is the cost per piece of protective clothing nearly three hundred or four hundred yuan? Under the current situation of epidemic prevention and control, the image of "white angel" wearing protective clothing has been constantly being brushed. However, protective clothing has also become one of the urgent needs for China's epidemic prevention. In this regard, Jin Xiangyu researcher at Donghua University explained in detail how protective clothing should be "three refuses to resist".

Water repellent, blood refusal, alcohol refusal and antistatic electricity
Jin Xiangyu said that the protective clothing should not only exhaust moisture, breathe freely, but also keep the medical staff free from infection of viruses, bacteria and other pollutants in the process of diagnosis and treatment, and resist water, alcohol and oil intrusion. Besides, it should be effective against static electricity and even prevent dust from entering.
Because of the use of micro nano scale medical and protective nonwovens, the basic requirement of protective clothing is "three refuses to resist", that is, water repellency, blood refusal, alcohol refusal and antistatic. Jin Xiangyu said that such composites could be made of different materials, such as polyethylene / polypropylene spun bonded nonwovens, compounded with breathable microporous films or other nonwovens, or with spunlaced nonwoven fabrics and breathable microporous membranes, or wood paddle composite spunlaced nonwovens.
It is worth noting that several properties of protective clothing materials have strict standards, including protective (sealing), wearability, safety and hygiene. The protective requirements are liquid barrier function. The key parts of the protective clothing (left and right front, left and right arms and back positions) are resistant to water penetration. They can resist static pressure of not less than 1 thousand and 670 PA (kPa). The resistance to synthetic blood penetrates not less than 2 grade, that is, the synthetic blood is applied to protective clothing with 1 thousand and 750 PA pressure and not penetrated after 5 minutes. Below 3 level. In addition, particulate matters should be penetrated, and the filtration efficiency of non oily particles at key parts and seams should be no less than 70%.

For protective clothing, the protective clothing must be of sufficient strength and dimensional stability. When tensile tests are carried out, the breaking strength is not less than 45, and the elongation at break is not less than 30%. The safety and hygiene requirements are non-toxic, no skin irritation and anti mold.

Single use, ensure protection and reduce cost as far as possible.

Under the condition of shortage of market supply, the protective clothing is also protected as the main battlefield. According to the preliminary statistics of the Ministry of industry and information technology, as of 24 hours in the evening of February 1st, domestic manufacturers have sent 136 thousand medical protective clothing to Hubei, 117 thousand have arrived, 134 thousand N95 masks have been delivered, more than 13.1 have arrived, and goggles, including medical isolation masks, have sent 188 thousand to 110 thousand. Domestic export processing enterprises urgently allocated some European standard protective clothing to Hubei, and some imported and overseas donated European standard and Japanese standard protective clothing arrived in Wuhan in batches.

According to the data from the Ministry of industry and information, compared to 20 million mask masks per day and 600 thousand N95 masks per day, the daily output of medical protective clothing reached 20 thousand in February 1st, which has doubled more than 8 thousand and 700 pieces in January 28th. The production volume is basically used in Hubei and Wuhan. Next, the state will do its best to resume production and expand production and further improve the supply capacity. In accordance with the State Council's deployment, unified management and unified allocation of the most urgent medical protective clothing have been carried out.

"Because protective clothing is disposable, the economic aspect requires that we should minimize the cost while ensuring the protective performance." The team of Jin Xiangyu researchers has been engaged in the research and development of medical protective materials since the outbreak of SARS (SARS) in 2003. Its medical protective clothing materials and other achievements have reached the leading international level. He said that the cost of protective clothing before this outbreak of pneumonia can be controlled within a few dozen yuan, while there is no limit to the length of single wear, depending on the intensity of medical work.
It needs to be reminded that wearing a N95 respirator is like a waste if it does not enter the "red area". The protective clothing is "medical personnel or epidemic prevention personnel dressed in crowds", leaving them as far as possible.