| A kinds of melt-blown Nonwovens including tourmalin powder were developed in this paper. This kind of Nonwovens can be used in many fields. Mixed with two different tourmaline in the polypropylene(pp) slices according to certain proportion, including 0 wt %,3 wt %,6 wt % and 8 wt% .This new type of tourmalin pp melt-blown nonwovens was made by method of melt-blowing process with corona charging.The results show that the electret of PP melt-blown nonwovens charged by corona-charging can be improved greatly. At the same time, Surface density of charge was increased form -3μc/ m~2 to -10μc/ m~2 , and more stable. In particular, the filtration efficiency (FE) of PP melt-blown nonwovens was 99.4% when the wind velocity is 2.83L/s and the area of filter is 50m~2, furthermore the filtration resistance (FR) declines. This kind of Nonwoven can be made to filter, the result show that this filter's FE is 98% and the fulteration velocity is 2.83L/s. Attain the level of the high efficiently filter.This kind of nonwoven has characteristic of far infrared, The result of the data prove that the content of tourmaline has evidently impact the photothermal properties of nonwovens. We also explore that the infrared emissivity has improved with the increasing of the tourmalin powder content, but the photothermal properties do not observe that rule. In a word, this kind of melt-blown nonwovens is a wonderful heat-storage material.This kind of nonwovens can discusses the negative ions and it's characteristic of anti-bacteria is also valuable for us. It can be made to health care material or medical protection material... |
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