English
Industrial protective masks are respiratory equipment used for environmental protection against industrial dust, toxic gases, etc., commonly found in mining, construction, smelting, chemical and other scenarios.
Standard and classification: China's industrial protective masks comply with the GB2626-2019 standard. KN class only filters non oily particles and is suitable for conventional dust scenes; KP can filter both oily and non oily particles, suitable for environments with oil fumes and mist. Each category is divided into three levels based on filtration efficiency: level 95 (≥ 95%) and level 100 (≥ 99.97%). General dust can be selected at level 95; Silicon dust and welding fumes are recommended to be rated at level 100; Heavy metal dust should be selected at level 100.
Type of face mask structure: Disposable face mask, non removable, replaceable upon failure, suitable for short-term operation. The filter element of the replaceable half face mask can be replaced separately, suitable for medium and long-term use. A full face mask covers the mouth, nose, and eyes, suitable for high concentration dust environments. Taking the Fangdun1105 series half face mask as an example, the mask body is made of food grade liquid silicone, designed ergonomically according to the Chinese face shape, and fits the face without easily producing pressure marks. It is available in two models: through type (1105C) and easy to buckle type (1105K).
Core technical parameters: When selecting, in addition to filtration efficiency, attention should also be paid to respiratory resistance and total leakage rate. The measured expiratory resistance of the half mask is less than 50Pa, the inspiratory resistance is less than 20Pa, and the KN95 level effective filtration is ≥ 0.3 microns.
Notice on toxic gas environment: GB2626-2019 dust masks are only applicable to particulate matter and cannot filter harmful gases and vapors. When toxic gases are present, a gas mask that meets the GB2890-2022 standard should be selected and paired with a filter box. If dust and toxic gases coexist, the dust-proof filter cotton should be used in combination with the filter box. The Fangdun1105 series supports modular configuration and can be paired with KN100 grade filter cotton and 5000 series filter cartridges to achieve dual protection against dust and toxins.
Key points for use: After wearing, perform an air tightness check to ensure that the face fits snugly without any air leaks. When there is a significant increase in respiratory resistance, or when the mask is damaged or unable to fit properly, it should be replaced in a timely manner. Disposable masks cannot be cleaned. The filter cotton of the replaceable face mask is a consumable part, and it is recommended to establish a replacement record according to the frequency of use.
