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Mar 07, 2020 The civilian protective masks are all flat. This mask is one level lower than the disposable medical mask protection. The structure is the same as that of the disposable medical mask, except that the melt blown cloth used in the middle is a common melt blown without electret treatment. Cloth, this kind of barrier effect is only droplets.

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b. Gb2626 2006 according to the leakage rate of mask and the filtering efficiency of mask itself, masks are divided into three grades90 (Kn90, kp90), 95 (kn95, kp95), 100 (kn100, kp100). This standard is closer to international standards, such as EU standard en149, NIOSH certification of the United States, as 1716 of Australia, js t 8151 of

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Apr 02, 2020 According to Chinese Standard GB 2626 2006, KN95, KN100, filtration efficiency using sodium chloride particulate matter detection is 95%, 99.97%, KP95, KP100 filtration efficiency using oil particulate matter detection is 95%, 99.97 %. These standards are the same as the US NIOSH

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Gb2626 2006 according to the leakage rate of the mask and the filtering efficiency of the mask itself, the mask is divided into three grades90 (Kn90, kp90), 95 (kn95, kp95) and 100 (kn100, kp100). This standard is closer to the international standard, such as the European Union standard EN 149, NIOSH certified mask in the United States, as

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Apr 02, 2020 According to Chinese Standard GB 2626 2006, KN95, KN100, filtration efficiency using sodium chloride particulate matter detection is 95%, 99.97%, KP95, KP100 filtration efficiency using oil particulate matter detection is 95%, 99.97 %. These standards are the same as the US NIOSH

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Gb2626 2006 according to the leakage rate of the mask and the filtering efficiency of the mask itself, the mask is divided into three grades90 (Kn90, kp90), 95 (kn95, kp95) and 100 (kn100, kp100). This standard is closer to the international standard, such as the European Union standard EN 149, NIOSH certified mask in the United States, as

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Nov 16, 2018 In China, there were two kinds of respiratorsKN90\KN95\KN100 (not resistant to oil) and KP90\KP95\KP100 (resistant to oil) . The NIOSH required the N95 (95% filter efficiency) mask as the least depending on the workers exposure to different types of coal dust and crystalline silica . However, in China, field investigations suggested that

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