Tips for purchasing masks

Lead: In foggy weather, masks have become a must for travel. Stars love masks, colorful colors and fashionable styles, and they go in and out of airports and streets, becoming a beautiful landscape. However, can such a mask effectively prevent smog?

Tips for choosing masks 1. Dust-proof efficiency

The dust barrier efficiency of the mask is based on its barrier efficiency to fine dust, especially to breathable dust below 2.5 microns. Because dust with this particle size can directly enter alveoli, it has the greatest impact on human health. Dust mask, its filter material is composed of activated carbon fiber felt pad or non-woven fabric, and those inhalable dust smaller than 2.5 microns pass through this filter material.

Second, the tightness.

The side leakage prevention design of mask is a technical requirement to prevent air from being inhaled through the gap between mask and human face without filtering. Air is like water flow, where there is little resistance, it flows first. When the shape of the mask is not close to a person's face, dangerous substances in the air will leak into a closed place and enter the human respiratory tract. Well, even if you choose the mask with the best filter material. It can't guarantee your health. Many foreign laws and regulations require workers to regularly test the tightness of masks. The purpose is to ensure that workers choose suitable masks and wear them according to the correct steps.

Third, it is comfortable to wear.

In this way, workers will be willing to wear them in the workplace and improve work efficiency. At present, foreign maintenance-free masks do not need to be cleaned or replaced, and they are discarded when the dust resistance is saturated or the mask is damaged, which not only ensures the hygiene of the mask, but also saves the time and energy for workers to maintain the mask. Moreover, many masks are arched, which can not only ensure a good fit with the face, but also reserve a certain space at the nose and mouth, making them comfortable to wear.

Precautions for wearing a mask. There is no need to wear a mask for a long time.

Wearing a mask for a long time is not only uncomfortable, but also unnecessary. It is often seen that someone is walking alone in an empty street and wearing a mask. From the perspective of preventing the spread of diseases, this is meaningless. In the current influenza epidemic season, it is recommended that citizens wear masks when they encounter the following situations: (1) Go to the fever clinic of the hospital by themselves or with their families; Family nursing care of patients with respiratory infectious diseases such as mild influenza A (h 1n*); When patients with mild influenza go out to have close contact with others; When taking public transportation such as buses and subways.

Second, the correct use of masks

Usually disposable masks bought by pharmacies are medical surgical masks. Before wearing a mask, you should wash your hands to avoid polluting the inside of the mask. After wearing the mask, you can pull the folds of the mask up and down with both hands to completely cover the nose, mouth and chin, and press the metal strips on both sides of the nose with your fingers to make the upper end of the mask close to the nose, thus better protecting the nose.

Third, pay attention to the degree of fit with the face.

Air is like water flow, where there is little resistance, it flows first. When the shape of the mask is not close to a person's face, dangerous substances in the air will leak into a closed place and enter the human respiratory tract. Well, even if you choose the mask with the best filter material. It can't guarantee your health. At present, many foreign laws and standards stipulate that workers should regularly test the air tightness of masks. The purpose is to ensure that workers choose suitable masks and wear them according to the correct steps.

Fourth, be diligent in cleaning.

The part of the mask that touches the nose and mouth will leave saliva. If it is not cleaned frequently, it is easy to breed bacteria and does not meet the hygiene requirements. The fibers of cotton masks are generally very thick, which can not effectively filter smaller particles, and most of them have not passed the international safety certification, so the protection effect can not be guaranteed. Gauze masks are almost useless, and there is too much air leakage on both sides of nostrils.

The above is the basic knowledge of wearing a mask. Wearing a mask generally refers to a device worn on the nose and mouth to filter the air in and out of the nose and prevent harmful gases, smells and droplets from entering and leaving the wearer's nose and mouth. It is mostly made of cloth or paper and should be discarded after each use.