How Much Do You Know About P3 Dust Filter?

November 26,2021

The P3 dust filter is indispensable protective equipment for workers engaged in and exposed to dust. It is mainly used in working environments that contain low concentrations of harmful gases and vapors. For firefighters and flour mill workers, P3 dust filters can protect them from dust hazards. However, due to the different functions and materials of masks, such as silicone half mask or rubber half mask, many people do not know how to choose when wholesale p3 dust filter. The following content may give you some references.


wholesale p3 dust filter


For dust masks, what do N, R, and P mean?


According to NIOSH's standard, it can be classified:


  • N series: protection against non-oily suspended particles, no time limit;


  • R series: protect non-oily suspended particles and sweat oily suspended particles, the time limit is eight hours;


  • P series: protection of non-oily suspended particles and sweat oily suspended particles, no time limit;


For people in some special industries, P3 dust filters are undoubtedly the best choice, so do you know what’s the difference between the P3 mask and N95 mask?


The difference between the P3 mask and the N95 mask


  • The grade types and standards of P3 masks and N95 masks are different. The P in the P3 mask refers to "Oil Protective" (oil-resistant particulate matter), which means that it can filter both oily and non-oily particulates. The N in the N95 mask stands for "Non-oil" (non-oil resistant particles). Generally, non-oily particulate matter refers to coal dust, cement dust, acid mist, microorganisms, etc. In the current haze pollution, most of the suspended particles are non-oily. The oily particulate matter refers to oil fume, oil mist, asphalt fume, and so on.


  • The filtration efficiency of the P3 mask and N95 mask is different. P3 mask means that the filtration efficiency of non-oily particles (such as dust, paint mist, acid mist, microorganisms, etc.) under the test conditions specified in the standard is at least 99%, while the N95 mask is 95%.


What factors affect the performance of the P3 dust filter?


Dust filters, as the name suggests, are to prevent the inhalation of dust. The key to its role is the performance of the filter material, mainly:


Fiber fineness of filter material


It is expressed in terms of fiber diameter and the unit is micrometers. Generally, the fiber diameter of the filter material used for dust masks is preferably less than 5 microns. The diameter of the commonly used polypropylene ultrafine fiber is 4.0 microns, and the fiber diameter of the perchloroethylene ultrafine fiber filter material is less than 2 microns. The drug abuse of fiber is positively correlated with the dust blocking efficiency, that is, the thinner the fiber, the higher the dust blocking efficiency.


The composition structure of the filter material


The organizational structure of the filter material is related to the manufacturing process of the filter material. At present, the molding process of synthetic fiber non-woven filter material mainly includes the acupuncture method, direct injection method, the bonding method, hot melt method, etc. The hot melt injection molding method is mostly used, and with this method, two or more different fiber materials can be used for composite molding, which improves the efficiency of dust resistance, is relatively soft, and has good air permeability.


Chargeability of filter media


The size of the filter belt classic two is positively correlated with the composition efficiency, that is, the greater the amount of static charge, the higher the dust resistance efficiency.


When dust passes through the filter material, the following happens:


  • Collision retention: When the particle size of the dust is larger than the gap between the filter media fibers, the dust collides on the surface of the filter media, changes direction due to the reaction of inertia and force, and settles and adheres to the surface of the filter media.


  • Hooking effect: There are burrs on the fiber. When the dust passes through the filter material, it is hooked by the burrs on the fiber to prevent particles from penetrating.


  • Multi-layer filtration: The filter material is made of superfine fibers lapped and woven into a net, and it has a multi-layered "three-dimensional structure". When the dust passes through the filter material, it is intercepted layer by layer.


  • Electrostatic effect: The filter material is electrostatically charged, which repels quite polar dust particles, and has an adsorption effect on dust particles of the opposite nature, that is, capture dust.