The BYD mask is a Chinese brand.
BYD mask is a three-layer mask, the production date of February 23, 2020, the use of 1 year, produced by BYD Precision Manufacturing Co., Ltd. can be used for health care, clean room, food service, etc., by the two layers of non-woven + the middle layer of a layer of non-woven filtration layer composed of the intermediate layer of anti-bacterial effect, are made by the ultrasonic welding and become.
BYD mask
Mask regular size 17.5x9.5, error 0.5, light color facing inward, dark color outward wear, if not good to distinguish the color you can look at the ear band, the side of the ear band mounted on the inner side. Aluminum-plastic nose clip upwards, worn at the mouth and nose, the ear band hangs on the ear.
This new coronavirus is mainly transmitted by droplet, droplet size between 0.1 ~ 0.3 microns, usually the transmission medium droplet diameter greater than 5 microns of particulate matter (but PM2.5 masks can not be completely effective in filtering droplets, and each layer of the material structure and function of the difference).
So we recommend that you wear disposable medical masks and N95 level masks, wear as much as possible so that the mask close to the face, adjust the position of the mask as far as possible without touching the hands of the mouth and nose of the mask circulation, masks must be replaced once the wet, every 4 hours to change the standard of masks is based on here.
Because of the high impedance of N95 mask airflow, will cause breathing difficulties, the general public should avoid long time wearing. For their own poor lung function, pregnant women or people with chronic respiratory diseases, asthma are also not suitable for use. It is best to simply avoid going out.