Misunderstanding one, use the gauze mask as a dust mask:
Therefore, the country expressly stipulates that the gauze mask can not be used as a dust mask: the dust-proof principle of the general gauze mask is mechanical filtration, that is, when the dust collides with the gauze, the layer of the barrier is blocked, and some large particles of dust are blocked in the gauze. For fine dust, especially dust below 5 microns, which is the most harmful to the human body, it will enter the human respiratory system through the mesh of gauze.
Misunderstanding 2, continue to use the non-woven dust mask after washing:
The common anti-fog mask material on the market is a melt-blown non-woven material. This material is composed of fibers filled with permanent static electricity, which can capture dust. After the dust is captured by the electrostatic fibers, it is extremely difficult to be separated by washing, and the washing will be Destroy static electricity. Therefore, the mask of the anti-fog mask material is not cleanable and is discarded after use. In order to save costs, some companies require employees to clean the anti-mite mask and continue to use it twice. Some N95 mask manufacturers put a layer of melt-blown non-woven fabric in the middle of the traditional gauze mask to produce so-called 'high-efficiency washable' dust mask. These are all wrong and dangerous behaviors.
Misunderstanding 3, often wearing a disposable mask will not get pneumoconiosis:
Disposable dust masks have a certain filtration volume, which exceeds its filtering capacity and cannot be dustproof. Therefore, in a workplace with a high dust concentration, the dust concentration should first be reduced to below the allowable concentration through engineering, and then consider choosing to wear a suitable dust mask. In addition, improper wearing of disposable masks can not be dustproof. This requires that the disposable mask be properly worn in strict accordance with the instructions for use to ensure that it does not leak and replace the failed dust mask in time.