How to choose a dust mask? First of all, we know that dust masks are special labor protection products in China and must comply with the national standard GB2626-2019 "Self-Priming Filtering Particulate Respirator". The standard divides dust masks into three levels: KN100, KN95, and KN90. For example, Baoshunan's 3216 KN100 and 3219 KN100 dust masks can achieve a protection efficiency of more than 99.97% against ultrafine dust above 0.075 microns.
Let's share our experience in choosing dust masks.
The protective effectiveness of the dust mask depends on two aspects:
First, the filtration efficiency of the filter cotton
Second, the leakage after The mask ; is suitable for facial gas rate;
Scientific selection of dust masks certified by GB2626-2019 standard can help precome lung damage.
(1) Choose duplex half mask type: disposable masks are not suitable for long-term protection or work due to their high air leakage rate
< p>(2) Choose level KN100; : very dusty environment Low protection rate will cause physical damage;(3) Choose a silicone mask, which has a relatively long service life, is soft and comfortable. Wearing it for a long time is not likely to cause allergic reactions; very hard masks can easily cause indentations on the face;
(4) It is extremely important that masks are divided into large and small sizes. It is not recommended to purchase these so-called universal masks. Different people are different sizes, short, fat and thin, and have different face shapes. Universal models definitely won't fit anyone's face.ut the world and are prone to air leaks; /p>
(5) There are two types of masks: covering the mouth and nose, and covering the mouth, nose and chin. It is recommended to use the latter, which is relatively more comfortable; p> (6) It is recommended to choose a mask with gentle breathing: in particular the use of double filter cotton + double filter. The dust mask with surface design has a longer service life and is relatively easier to breathe.
Can the dust produced by lithium batteries be used as raw material
Why don't lithium battery companies allow family members to 'enter?
This is for safety reasons, because lithium batteries Lithium battery is a kind of secondary rechargeable battery. The battery structure includes positive and negative electrodes, separator, organic electrolyteand a battery box. There are specific placement and retention requirements. If there are a lot of people coming in and out, there will be some safety risks.
How to clean dust: Scientific choice of dust masks certified by GB2626-2006 standard can help prevent lung damage.
1. Choose the duplex half mask type. Disposable masks have a high air leak rate.
2. Choose grade KN100 for good protection.
3. Choose a silicone mask, relatively soft and comfortable.
4. Masks are divided into large and small sizes. It is not recommended to purchase these so-called universal masks, which are prone to air leaks.
5. It is recommended to choose a smooth breathing mask.