摘要
为理清口罩过滤效率检测用颗粒物粒径的相关科学概念,介绍了GB 2626—2006《呼吸防护用品自吸过滤式防颗粒物呼吸器》中所用颗粒物粒径及粒径分布的基本概念和描述方法。在回顾呼吸性粉尘和空气动力学质量中位径(MMAD)概念的基础上,重点介绍了计数中位径(CMD)换算为MMAD的方法,通过计算证明GB 2626—2006中过滤效率测试用颗粒物的MMAD为0.3μm,该粒径为最具有穿透性的颗粒物粒径。应用该换算方法,探讨了AQ 1114—2014《煤矿用自吸过滤式防尘口罩》中以MMAD大于7μm粗粉尘颗粒物测试过滤效率的局限性,并采用MMAD为0.3μm的颗粒物评估典型口罩材料的过滤效率,为正确评价国内外防颗粒物口罩标准提供专业指导。
To clarify the related scientific concept of particle size used in testing mask filter efficiency,this paper systematically introduced the basic concepts and descriptive methods of particle size and particle size distribution for filter efficiency test in the Chinese national standard GB 2626—2006"Respiratory protective equipment-non-owered air-purifying particle respirator".On the basis of reviewing the concepts of respirable dust and mass median aerodynamic diameter(MMAD),emphasis was laid on the calculation method for converting the count median diameter(CMD)into MMAD,which proved that the CMD provided in GB 2626—2006 meets the requirement of MMAD 0.3μm,the most penetrating particle size,used for the filter efficiency test.Based on the conversion method,the dust size with MMAD higher than 7μm used in AQ 1114—2014"Self-inhalation filter type dust respirator for coal mines"for filter efficiency test was discussed.The particle filter efficiency of typical filtration media used in masks was tested using the 0.3μm particles.It provided professional guidance for the correct evaluation of domestic and foreign standards for particle masks.
作者
杨小兵
程钧
张守鑫
姚红
陆林
丁松涛
YANG Xiaobing;CHENG Jun;ZHANG Shouxin;YAO Hong;LU Lin;DING Songtao(State Key Laboratory of NBC Protection for Civilian,Research Institute of Chemical Defense,Military Science Academy,Beijing100191,China;Beijing Key Laboratory of Ambient Particles Health Effects and Prevention Techniques,Beijing100191,China;Sinosteel Wuhan Safety&Environment Protection Research Institute Co.,Ltd.,Wuhan,Hubei430081,China;3 M China Company,Beijing100176,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2020年第8期152-157,171,共7页
Journal of Textile Research
基金
国家重点研发计划项目(2017YFC0804907)
国家标准制修订计划项目(201311680-Q-450)
核化应急救援科研基金项目(W3106)。
关键词
口罩
颗粒物防护
粒径分布
空气动力学质量中位径
最易穿透粒径
过滤效率
标准
mask
particle protection
particle size distribution
mass median aerodynamic diameter
most penetrating particle size
filter efficiency
standard
