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Introduction to the function and performance of dust masks

Release time:

2022-10-31 14:58

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Dust masks are mainly used in working environments with low concentrations of harmful gases and vapors. Filter boxes contain only sorbent or sorbent. Some cartridges also contain a filter to keep out aerosols. Some military protective masks mainly use activated carbon cloth, or waterproof and oil-resistant fabric as the outer layer, glass fiber filter material as the inner layer, and polyurethane foam soaked in activated carbon as the bottom layer, which can provide temporary protection in case of sudden gas attack. Next, let's take a look at the function and performance of dust masks.

1. The role of dust masks

1. Prevent or reduce the dust in the air from entering the human respiratory organs;

2 , Material: Dust masks mostly use two layers of non-woven fabric inside and outside, and a layer of filter cloth (melt blown cloth) structure;

3. Filtration principle: Dust filtration mainly depends on the filter cloth in the middle, because the melt blown filter cloth has its own electrostatic characteristics and can absorb small particles. Because dust is adsorbed on the filter cloth, and the filter cloth cannot be cleaned with static electricity, the dust mask is disposable.

4. Remarks: The international requirements for the use of dust masks are quite strict.

2. Introduction to the performance of dust masks

The working principle of the air filter mask, or the filter mask for short, is to filter the air containing harmful substances through the filter material of the mask and inhale it. The structure of the filter mask is divided into two parts, one is the main body of the mask, and the other is the filter material part, including the filter cotton for dust removal and the chemical filter box for gas protection.

Surgical mask: Made of three-layer "non-woven fabric" suitable for the operating room environment; it can block more than 4 micron particles.

Activated carbon medical mask: The main function of adding activated carbon material is to isolate the taste, not to prevent bacteria and viruses. Respiratory resistance will increase, and the bacterial function will reach 98%.

Dust-proof mask: mainly dust-proof, with general antibacterial function.

Ordinary paper masks: useful for blocking larger particles and viruses with a diameter less than 5 microns, easy to spread, and isolated Functionality is limited.

Industrial dust masks: The national standard GB2626-2006 "Self-priming filter type anti-particulate respirator" divides masks into Three types: full-cover air supply masks refer to clean air sources isolated from harmful substances, which are sent to the face by tubes and masks for breathing through the dynamic action of air compressors, compressed gas cylinders and other devices.

 

 

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