One year after the global outbreak of the covid-19 pandemic, it still hasn't stopped. Although the vaccine has gradually become popular, the virus mutation rate has reached 55%. I am afraid that the effect of the vaccine has yet to be investigated. Among them, the European and American epidemics are the most serious. Due to the large number of infections, the number of confirmed cases is still high. Masks need to be worn continuously and normal life has not been restored.
According to data from Johns Hopkins University in the United States, there are currently more than 30 million confirmed cases of COVID-19 and more than 540,000 deaths in the United States, ranking first in the world.（Click to share to LinkedIn）
In recent days, although the epidemic curve in the United States has shown a downward trend, many states have relaxed epidemic prevention measures, and the crowds on beaches and streets have surged, and many people have taken off their masks. Health experts warn that within a few weeks, the United States may still "see another surge in cases."
Why is it necessary to wear a mask during a pandemic? Because the mask has a good anti-pandemic effect, it can block the spread of the virus, which is determined by the material of the mask. The main material of the mask is composed of meltblown non-woven fabric and viscose non-woven fabric. In fact, both fabrics are composed of polypropylene (PP), but the technology of processing into fabric is different.（Click to share to Facebook）
Melt blown cloth is to melt the polypropylene pellets (Polymer Chips) first, then spray the liquefied polypropylene into ultra-fine filaments with air, and finally roll it into a cloth shape. The whole process is like rolling a marshmallow. The non-woven fabric made by the melt-blown method has very fine fibers, soft texture and light weight, but the fibers are unevenly distributed and easy to break; it can be used for filtration, oil absorption, clothing, etc., and is very versatile. Moreover, the production speed of meltblown non-woven fabrics is fast, and the materials used are few.（try Suntech ST-AMB Meltblown machine）
Viscose non-woven fabric is polypropylene melted and pressed into a cloth shape. The fiber is thicker, tens to a hundred times thicker than that of meltblown nonwoven fabric. The distribution is more even and stronger. Therefore, it can protect the fragile meltblown when made into a mask. Non-woven.
At the beginning of the pandemic, there was a shortage of melt blown cloth, which caused the price of melt blown cloth to soar and fell into a "mask shortage". Why is it so difficult to produce melt blown cloth? Because the melt-blown technology is complicated, the melt-blown equipment is difficult to manufacture and the cost is high.
Meltblown technology was invented by the US Navy and was used to isolate radiation when handling instruments. It was later popularized by Exxon Mobil Corporation for civil use. The production technology of meltblown nonwovens is still under development, and is currently led by multinational chemical companies in Europe, America and Japan, such as Dupont and Toray. The meltblown technology of related companies can produce meltblown nonwovens with nanometer-level fineness, which are used in innovative industries such as medical treatment, such as kidney dialysis machines. The latest research is even used for cell tissue cultivation.
The most difficult part in meltblown technology is the spinning part, because it is necessary to determine the thickness, direction, and fiber distribution. Although advanced nano-level technology is mainly mastered by developed countries, many companies’ production lines for ordinary products are located in China, and the cost of related machinery is about 2 million to 10 million yuan. However, the machinery occupies a relatively large area and only large-scale factories has melt blown machines.
Melt-blown cloth products are made very well in China, but only high-end products have a gap. The epidemic is developing rapidly, so the previous production volume cannot catch up. After China resumes work and expands production, it will not only meet domestic demand, but also support overseas demand.
With 50 years of technical precipitation and design experience, Suntech has developed and produced intelligent meltblown machines, integrated intelligent elements, solved complex meltblown technology, solved meltblown cloth production problems, reduced the cost of masks, and assisted the production of masks with "precision and intelligent manufacturing" standards and human health.