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.
