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自五十年代后期以来,滤膜测尘法在国内得到逐步推广使用,到目前已成为普遍使用的测尘方法。关于滤膜的基本性能,滤尘效果,测尘技术和操作方法等,已有不少研究。认为滤膜具有重量轻,阻力小,憎水性强和滤尘效能高等特点,而且测尘方法简便,节省时间,可以正反两用,适用于生产现场粉尘浓度和分散度的测定。 我们在测尘工作实践中,还发现滤膜两面有所不同:一面光亮平整,表面纤维长而密,静电吸力作用较强,称作正面;另一面较暗,有“井”字纹理,表面纤维短而疏,静电吸力作用较弱,称作反面。从1975年开
Since the late fifties, the filter dust detection method has been gradually popularized and used in China, and it has become a commonly used dust detection method so far. On the basic performance of the filter, filter dust effect, dust measurement techniques and methods of operation, there have been many studies. It is considered that the filter has the characteristics of light weight, low resistance, strong hydrophobicity and high efficiency of filter dust. Besides, the method of measuring dust is simple, saves time, and can be used both positive and negative. It is suitable for the determination of dust concentration and dispersion in the production site. We dust in the practice of practice, but also found that the filter on both sides are different: a bright and smooth, long and dense fiber surface, strong electrostatic attraction, known as the positive; the other darker, the “well” texture, the surface Fibers are short and sparse, with weak electrostatic attraction, called backside. Opened from 1975