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What is meltblown nonwoven fabric?

Time:December 31 2020 Author:Jingde Medical Views:16120

Melt blown non-woven fabric is the filter layer in the middle of the mask, which can filter bacteria and prevent the spread of germs. Melt blown fabric is a kind of polypropylene with high melt index. Roots blower is irreplaceable in the melt blown cloth industry The role of. Melt-blown cloth uses high-speed hot air flow to draw the thin stream of melt extruded from the die orifice, thereby forming ultra-fine fibers and collecting them on the mesh curtain or roller, and at the same time bonding themselves to become a melt-blown method Non-woven. Melt blown cloth is a filter material with polypropylene as the main raw material. The fiber diameter can reach 1 to 5 microns.

The difference between PE film and melt blown cloth?

1. Melt-blown process is one of the melt-spinning processes.

The melt-blown non-woven process uses high-speed hot air flow to draw the thin polymer melt extruded from the die orifice, thereby forming ultra-fine fibers and collecting them on the mesh curtain or drum, and at the same time bonding themselves. Become a meltblown nonwoven fabric. At present, there are two main production processes for meltblown nonwovens: Exxon and Biax, most of which are Exxon processes, which are characterized by the use of a single row of spinneret holes, and high-temperature polymer melt The spinneret in the center of the plate is sprayed out, and then it is drawn by the high-temperature air blown from both sides at a certain angle, and finally it is self-consolidated into a melt-blown cloth by the waste heat of the fiber on the collecting device.

Sometimes it is wrong to say spunmelt. Spunmelt is short for spunbond and meltblown. In fact, spunbond and meltblown are similar, but they are essentially different. Spunbond and meltblown composite processes form a combined machine.

2. The biggest advantage of PE protective film is that the protected product is not polluted, corroded, scratched during production, transportation, storage and use, and protects the original smooth and shiny surface, thereby improving the quality of the product and the market Competitiveness.


How to choose a meltblown non-woven mask?

The first choice should be based on the concentration and toxicity of the dust. According to GB/"Selection, Use and Maintenance of Respiratory Protective Equipment", as a half-face mask, all dust masks are suitable for environments where the concentration of harmful substances does not exceed 10 times the occupational exposure limit. Otherwise, a full face mask or a higher level of protection should be used. High respirator.

If the particulate matter is highly toxic, carcinogenic and radioactive, the filter material with the highest filtering efficiency should be selected. If the particulate matter is oily, be sure to select a suitable filter material.

If the particulate matter is needle-like fibers, such as slag wool, asbestos, glass fiber, etc., dust masks cannot be washed with water, and masks with microfibers attached to the sealing parts of the face can easily cause facial irritation and are not suitable for use. For high temperature and high humidity environments, it will be more comfortable to choose a mask with an exhalation valve. Choosing a mask that can remove ozone for welding can provide additional protection.

The outer layer of the mask often accumulates a lot of dust, bacteria and other dirt in the outside air, while the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides cannot be used alternately, otherwise the dirt on the outer layer will be directly attached. It becomes a source of infection by inhaling the body when it is face. When the mask is not worn, it should be folded into a clean envelope, and the side close to the nose and mouth should be folded inward. Do not put it in your pocket or hang it around your neck.

If the mask is wetted by exhaled heat or saliva, its function of blocking germs will be greatly reduced. Therefore, it is best to prepare a few more masks so that they can be replaced and washed once a day. 

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