Q: How long is the delivery time?
Answer: The general situation is 3-5 days for delivery. If you need a customized mask shape, it will take 7-10 days. Please refer to customer service for details.
Question: The machine I want is too inconsistent with what you showed on the Internet. Can I do it?
Answer: Yes, you need to provide machine pictures and finished mask pictures.
Question: What should I do if I buy a machine and I won’t install it back?
Answer: South Korea and Vietnam have after-sales and can be installed on site. Other countries can send installation videos and remote video guidance. Many foreign customers install this way. You only need to install the four screws of the connector of the filming machine and the earband machine, learn to load the cloth and operate normally. The company will be equipped with text version and video version of the whole teaching.
Q: How long is the warranty period?
Answer: The warranty period is one year. The ultrasound is three months. During the warranty period, the parts are damaged and the company provides new parts.
Why can't export masks be made with a mask machine? It is because of the lack of the core material of masks: melt blown cloth. What is the meltblown cloth? Cut a used medical mask, and you will find that the mask has three layers, (inner layer) moisture absorption layer, (middle layer) core filter layer, and (outer layer) water blocking layer. Because in accordance with national production regulations, medical masks contain at least 3 layers of non-woven fabrics (N95-level masks, structurally optimized: (middle layer) the core filter has more layers and thicker). S layer: Polypropylene special resin (Sinopec)-Non-woven fabric factory-Mask factory M layer: High melt index polypropylene special resin (Sinopec)-Modified plastic factory (During the epidemic prevention period, Sinopec will produce melt blown cloth Special materials)-Meltblown non-woven fabric factory-Mask factory. Melt blown cloth, commonly known as the "heart" of the mask, is the filter layer in the middle of the mask, which can filter bacteria and prevent the spread of germs. Melt blown cloth is a kind of polypropylene with high melt index as a material, a film formed by stacking many criss-cross fibers in random directions. The fiber diameter ranges from 0.5 to 10 microns, and the fiber diameter is about 30 minutes of the hair. one.
How does the meltblown cloth filter out viruses in the environment with such a large gap? Although the size of the new coronavirus is very small, about 100 nanometers (0.1 micron), the virus cannot exist independently. Its transmission routes are mainly secretions and droplets during sneezing. The size of droplets is about 5 microns. First, second, the melt blown cloth is essentially a fiber filter. When the virus-containing droplets are close to the melt blown cloth, they will also be electrostatically adsorbed on the surface and cannot penetrate.
Although the S layer and M layer of the mask are made of special polypropylene resin, the special materials for meltblown cloth and other non-woven fabrics are very different in production technology and performance. Melt blown cloth
How does melt blown cloth come from?
The special material for melt blown cloth is polypropylene with high melt index. The higher the polypropylene melt index, the finer the melt-blown fibers and the better the filterability of the melt-blown cloth made.
On February 23, Shanghai Petrochemical's emergency R&D and conversion of special meltblown non-woven fabrics was successfully trial-produced. It can produce 6 tons per day, which will help to add nearly 6 million disposable medical masks per day.
Since the raw material polypropylene of melt blown cloth is derived from petroleum, petrochemical companies have an advantage in producing melt blown cloth. In order to solve the problem of high melt index, Shanghai Petrochemical has set up a research and development team to carry out formula research, test analysis and scale-up experiments, and strive to overcome the difficulties of equipment and technology, and finally successfully overcome the problem of high melt index polypropylene modified production.
Employees are analyzing the melt index of the samples. It is reported that through process optimization, Shanghai Petrochemical is expected to increase production by about 2 tons per day in the short term, reaching a daily output of 8 tons of special materials for melt blown cloth. We must know that domestic meltblown non-woven fabrics were relatively niche before, with an annual production capacity of 53,500 tons, accounting for 1% of non-woven fabric production capacity. They are mainly used for the production of masks, environmental protection materials, clothing, battery separators and other products.
It is said that the melt index of Shanghai Petrochemical's previous products is only one-thirtieth of the special material for mask meltblown cloth. Faced with the challenges of insufficient hardware such as slow pelletizing speed, short cooling distance, insufficient screw length, etc., the company has tried its best to meet the existing equipment conditions by transforming the electronic control system and transmission system, calling other production line tanks, and optimizing the die head. Carry out emergency transformations and adjustments to meet production needs. Comparing the cross-sectional view of the N95 mask and the medical surgical mask, the scanning electron microscope picture can clearly see that the thickness of the melt blown cloth of the surgical mask is 156 microns and the thickness of the melt blown cloth layer of the N95 mask is 521 microns, which is 3 times that of the surgical mask. .
As the demand for domestic masks, especially medical masks, is still relatively strong, there is a short-term supply gap for meltblown non-woven fabrics. However, as the epidemic situation outside Hubei Province is gradually controlled, the demand for masks is expected to gradually decline, so the price will remain high in the short term, but substantially The probability of an increase is small. In the future, with the prevention and control of the epidemic in place, the price of meltblown non-woven fabrics is expected to fall back to normal levels.
