Dust (especially industrial dust) is the enemy of human health. The finer the dust, the longer it stays in the air, and the more easily it is inhaled by the human body, especially the respiratory dust less than 5 microns, which will directly enter the alveoli and deposit, leading to silicosis or other pneumoconiosis, and even the ability to work. And then die.

With the emergence of various air pollution problems, dust masks have become a necessity in people's lives. How much do you know about the dust masks you use frequently? Introduce some knowledge about dust masks.

First, the type of dust mask

1. Classification of dust masks:

According to its structure and working principle, it is divided into two categories: self-priming filter and air supply.

Self-priming filter: The working principle of the filter mask is to filter the air containing the harmful substances through the filter material of the mask and then inhale it;

Air supply type: refers to a clean air source that will be isolated from harmful substances. It can be sent to the person's face for breathing through the tube and mask through dynamic action such as air compressor and compressed gas cylinder device.

The structure of the self-priming filter type dust mask is divided into two parts: one is the mask of the mask, we can simply understand that it is a mask shelf; the other is the filter part, including the filter cotton for dustproof and anti-virus Chemical filter boxes used, etc.

Self-priming filter dust masks are available in several types:

Half-face: a mask that only covers the respiratory organs (mouth and nose);

Comprehensive type: the mask can cover the entire face including the eyes;

Electric air supply type: that is, driven by battery and motor, the air containing harmful substances is pumped into the filter material and filtered for human breathing.

Half masks are divided into:

Maintenance-free type: This kind of mask is mostly dustproof, and the main body and the filter material are combined into one, and the filter material cannot be replaced;

Low maintenance type: The main body of the mask has no replaceable parts, such as replacing the entire mask when damaged;

General maintenance type: When the parts of the mask are damaged, they can be replaced one by one, and also pay attention to maintenance.

Second, the maintenance method of dust mask

1, when not wearing masks, should be folded into the clean envelope, and close to the nose and mouth of a face in the folded, should not casually stuffed in his pocket or hung around the neck.

2, dust masks should be adhered to daily cleaning and disinfection, whether it is gauze masks, or air filter masks can be heated by means of sterilization.

The specific approach is:

(1) Cleaning.

Gently lick the gauze mask with warm water and soap. The bowl-shaped mask can be gently brushed with a soft brush and then washed with water. Please note that you should never use force, because if the latitude and longitude gap of the gauze is too large, the effect of anti-stopping droplets will be lost.

(2) Disinfection.

Place the cleaned mask in a 2% peracetic acid solution for 30 minutes or boil in boiling water for 20 minutes or in a steamer for 15 minutes, then allow to dry. This method is suitable for gauze masks and bowl masks.

(3) Inspection.

Before using it again, you should carefully check whether the mask and mask are still intact. For the gauze mask and mask, you can take the light transmission method, that is, take the light before the light to see if there is any obvious light spot, and the middle part and the edge part are transparent. Is the rate consistent? If there is any doubt, it is necessary to replace it with a new one. In any case, masks and masks are generally updated after 3 to 7 washes, and masks of exceptional quality can be cleaned 10 times. Activated carbon adsorption masks should pay attention to the regular replacement of the activated carbon interlayer. If the activated carbon interlayer is not replaceable, it should be replaced after 7 to 14 days. This mask can not be used after cleaning.