According to the latest regulations, masks must conform to the GB2626-2006 standard. In terms of dust masks, they are categorized into three grades: KN100, KN95, and KN90. The highest grade, KN100, can offer a protection rate of almost 100% (above 99.97%) against ultrafine dust with a particle size of 0.75 microns or smaller. For larger particle sizes, one can use a KN95 grade mask. It is essential to follow the appropriate mask grade to ensure maximum protection against harmful dust particles.
Dust masks offer protection based on two factors: the effectiveness of the filter cotton in filtering out particles and the tightness of the mask's fit on the face. These two aspects collectively determine the level of protection provided by the mask against harmful dust and particles.
To ensure proper protection, it's important that masks come in different sizes as the fit can vary from person to person. Even within the same size, the mask may not fit the same on all faces. Therefore, it's crucial that people try on different sizes and styles to find the best one that provides a secure and comfortable fit. It's also important to note that wearing a mask alone cannot fully protect against the transmission of viruses, and should be combined with other preventative measures such as social distancing and proper hand hygiene.
To ensure effective and long-term protection in occupational settings, it is crucial to choose a duplex half mask type over disposable masks. This is because disposable masks have a high air leakage rate, making them unsuitable for extended use and professional purposes.
To ensure adequate protection against harmful dust particles, it is important to choose dust filter cotton that meets KN100 grade standards. Failure to do so may result in bodily harm from inadequate protection. Therefore, it is crucial to prioritize safety and select high-quality dust filter cotton when working in dusty environments.
I would recommend opting for a silicone material as it provides enhanced comfort. Silicone is particularly suitable for long-term wear and reduces the likelihood of allergic reactions. It's worth noting that masks with higher hardness levels can lead to facial indentation, which can be quite uncomfortable.
4. The division of masks into different sizes is of utmost importance, making it crucial to avoid purchasing supposedly generic masks that are prone to leakage.
When it comes to masks, there are two different types to choose from. One covers both the mouth and nose, while the other only covers the lower jaw. It is suggested that you opt for the latter as it's more comfortable to wear.
It is advisable to select a breathing mask that offers a smooth experience. Specifically, there are certain masks that utilize double filter cotton, which has two sides for filtering purposes. This feature ensures that breathing through such masks is relatively easy and comfortable.