In general, some manufacturers supporting the air compressor because the air compressor used for many years on the air compressor to understand more about the Roots fan to understand less, but the air compressor does have many shortcomings, and now the meltblown cloth standard requirements are getting higher and higher, a lot of masks are stuck in the export of the standard is not up to the requirements of the meltblown cloth, the requirements of the strict or recommended preference for the Roots fan. To me in detail:
1, we should have eaten cotton candy, right? Manufacturing meltblown cloth and cotton candy principle is largely the same. The difference is that the meltblown cloth is used in the molten state of the polymer (such as polypropylene), and is not like syrup as "flung" out, but in the role of high-pressure hot air from the role of a lot of small nozzles in the mold out.
2, air compressor or Roots fan is a high-pressure hot air flow of the gas source equipment, but the air compressor is relying on the piston in the closed chamber compressed air output airflow, piston and the casing to be lubricated with lubricating oil to lubricate, not to overheat and burn, and then the gas out of the oil filtration, but only most of the oil can be filtered mist, or a small amount of oil mist with the air with the air sprayed with a molten state! Polymer to form a meltblown cloth, with feet think can also understand, this meltblown cloth will certainly have oil mist odor. In addition, the air compressor pressure of 100KPA-10000KPA or more, this pressure is too high for the meltblown cloth, need to reduce the pressure to use.
3, while the Roots fan is working in this way, the use of the casing and the impeller between the small gap, forced the air out, the cavity does not use lubricating oil, so the output air does not contain oil, sprayed out of the meltblown cloth does not contain impurities and no odor. The pressure range of Roots fan is 10-100KPA, generally the best meltblown cloth pressure requirement is 58.8KPA, because it is just suitable for meltblown machine. Moreover, the efficiency is much higher than air compressor under low pressure working condition below 100KPA, and its simple internal structure is easier to maintain than air compressor.
4, the use of Roots fan manufacturing meltblown fabric fibers not only will not have oil mist odor, because there are no impurities will also be stacked and bonded, but also entangled with each other, with enough cohesion, can form a higher strength and stable structure. Jin Gong has more than 150 meltblown cloth supporting the Roots fan, which is the result of experience.