These 5 Must-Dos prevent the spread of the COVID-19 pandemic. Ensure the lives of your near and dear ones are safe. Keep Safe! Be Happy!

 The dust blocking efficiency of the breathing respirator mask is based on its blocking efficiency for fine dust, especially for breathing dust under 5 micrometers. Because this size of dust can directly enter the alveoli, it has a great impact on human health. In general gauze masks, the principle of dust suppression is mechanical filtration, that is, when the dust hits the gauze, it passes through layers of barriers to block some large particles of dust in the gauze.

However, some fine dust, especially dust smaller than 5 microns, will pass through the gauze mesh and enter the respiratory system.

The outer layer with the respirator mask often accumulates a lot of dust, bacteria and other contaminants in the outside air, and the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides cannot be used interchangeably, otherwise the contaminated outer layer will be directly Inhale the human body when it is close to the face and become a source of infection. When the mask is not worn, it should be folded and placed in a clean envelope, and the side that is close to the nose and nose should be folded inwards. Do not stuff it into your pocket or hang it around your neck.

Respirator mask must be of the right size and worn in the correct way for the masks to be effective. Masks on the market are generally divided into two types, rectangular and cup-shaped. A rectangular mask must have a structure of at least three layers of paper in order to have a protective effect. KN95 respirator mask and KN90 respirator mask.

The KN90 respirator  mask can filter at least 90% of non-oily particles with an average diameter of 0.3 μm, while KN95 filters at least 95% of particles. From the perspective of anti-particulate matter, KN95 is better than KN90.

The user needs to press the iron wire on the mask against the bridge of the nose, and then spread the entire mask along the bridge of the nose in order to exert the effect. Let the child wear a rectangular surgical mask because it has no fixed shape, and if it is tied well, it can be close to the child's face. Cup-shaped masks must ensure that the masks have sufficient density after they are attached to the face, so that the exhaled air will not leak out to be effective. When wearing a cup-shaped mask, cover the mask with both hands and try to blow air. Check whether there is air leakage from the edge of the mask. If the mask is not tight, you must readjust the position before wearing it.