PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
"New Crown" outbreak, ePTFE membrane filtration N95 mask become the first choice.
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-11-22
Visits:
In 2020, due to the outbreak of novel coronavirus pneumonia, masks have become a necessity for many people, especially N95 masks (referring to our country's filtering effect on particulate matter
Masks are greater than or equal to 95%), the market has appeared out of stock, at present, there are many mask manufacturers are also working overtime manufacturing.
At present, most of the international range of mask filtration process is still stuck in the melting cloth deep adsorption filtration stage. To improve the filtration efficiency, the thickness of the filter material must be increased. But as the thickness of the filter material increases
Plus, its respiratory resistance is bound to increase. Solving the contradiction between the two parameters of "filtration efficiency" and "respiratory resistance" has become the research direction of the majority of mask manufacturers. Under regular circumstances,
The filtration efficiency of the filter material reaches more than 90%, and the wearer will have a clear feeling of tightness. If the filtration efficiency reaches more than 95%, it is difficult to breathe normally. Due to the coarse fibers and large voids of meltblown nonwovens
Many particles can overcome the adsorption of fibers and pass through the filter material. The filtration accuracy of the deep adsorption filtration process is difficult to do very high.
PTFE material, with excellent chemical inertness, wide temperature range, small coefficient of friction and many other superior characteristics, has become the first choice of mask material, and ePTFE mask special microporous filter film is also in research and development.
This membrane is one of the more difficult PTFE products to manufacture, and by using ePTFE filtration technology to make N95 protective masks, the performance of respiratory protective masks has been achieved.
The improvement of the style and the revolutionary change. This means that any particles larger than 0.2 microns, including many bacteria, cold viruses, etc., are almost completely filtered out.
Figure 1: N95 type mask source: network
In order to better realize environmental protection, the reinforcing base cloth of ePTFE microporous filter membrane mask can adopt PP non-woven fabric substrate, and the adhesive can adopt environmentally friendly water-based latex, which will make the mask even after more
The second cleaning will not affect the use effect.
Under the premise of ensuring efficient filtration, the ePTFE membrane filter N95 mask can breathe normally for a long time without the aid of a breathing valve.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Preferred, filtration, mask, n95,eptfe, adsorption, particulate matter, environmental protection
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