Production process of medical protective clothing

 Generally speaking, the production of medical protective coveralls needs to go through the steps of raw material preparation, cutting, stitching, tightening, adhesive and pressing, finished products, sterilization and disinfection, warehousing and so on. Among them, sterilization and disinfection takes the longest time. Ethylene oxide is mostly used for sterilization and disinfection of materials, which requires 7-14 days of analysis, seriously affecting the production efficiency of medical protective gown, and a more efficient sterilization method is urgently needed. Irradiation sterilization can be sterilized without disassembly and assembly, which is efficient and prevents secondary pollution. In 2011, Japan has listed the operation specifications of irradiation sterilization in the sterilization standard for protective clothing, which will reduce the sterilization time to less than 1 d. In order to address the shortage of medical protective clothes during the pandemic, sterilization by irradiation is permitted as a temporary emergency solution, but this emergency solution is specifically limited to emergency use during the pandemic because the strength of fabric materials may be reduced by irradiation at different absorbed doses.

Raw materials for medical protective coveralls

In the fight against COVID-19 in 2020, medical protective clothing manufacturers played a significant role, including 3M medical protective gown, DuPont Tyvek1422A rubber strip medical protective clothing, anhui MedPurest Medical Technology Co., LTD., medical disposable protective gown, etc.

From the use times, the current market applications are almost all disposable medical protective clothes, the fundamental reason is in reusable medical

In terms of disinfection treatment of protective coveralls, for example, secondary virus transmission may occur in the process of collection and transportation, as well as the overall high cost and lack of relevant standards. In addition, the breathability and moisture permeability of the reproducible medical protective coverall is poor, which can not meet the current needs in terms of comfort. Although disposable medical protective clothing may cause heat stress and other reactions in the process of wearing for a long time, compared with the repeatable medical protective clothing, disposable medical protective suit has a qualitative leap in the comfort of wearing for a long time. Therefore, more disposable medical protective gowns is selected in the market.

From the perspective of material, several medical protective suits currently applied in the market are basically composed of nonwoven products and selective microporous membranes, except duPont which uses Tyvek as a single material. The preparation method of Tyvek material, namely flash nonwoven material, is to make spinning solution by dissolving the polymer in a certain solvent, which is spewed out through the spinnet hole. Due to the rapid evaporation of solvent, the polymer is re-solidified into fiber, which is attached to the collection device and formed by strengthening. Other non-woven materials used in medical protective clothing are mainly spunbond, SMS, SMMS non-woven materials. Spunbond nonwovens are spunbond nonwovens with a certain viscosity of the polymer in high temperature melting conditions through the screw extrusion through a small hole, after drawing and wire into a net reinforcement to form spunbond nonwovens, commonly used polymers are PET and PP; SMS and SMMS materials are prepared with 1-2 layers of melt-blown nonwoven materials between 2 layers of spunbond by online or off-line composite process. The more melt-blown layers, the better the protection performance. Polytetrafluoroethylene (PTFE) permeable film and polyethylene (PE) permeable film are often chosen for permeable film. MedPurest medical protective coveralls are made of PP) nonwoven fabric and PE breathable film, as well as SMS and SFS medical protective gowns. Where S stands for spunbond layer; M stands for melt-blown layer; F stands for PE breathable layer. Comparative study shows that membrane products with high barrier make the best protection, medical protective clothing market applications; SMS products have the best comfort due to their lightness and softness, but lack of barrier. They are mostly used in surgical gowns and lack of virus protection effect. Flash nonwoven materials have the best comprehensive effect, both high barrier and excellent comfort.