There are many factors that affect the quality level of Meltblown Non-Woven Fabrics. From raw materials to equipment, each process is very important. Even if there are only individual factors, the quality of the final product may vary greatly. After the in-depth research and repeated testing of Ruize , Meltblown non-woven fabric reaches N95+, and the following eight aspects must be strictly controlled. Now I will tell you in detail
1.It has low odor, low ash content, high isotacticity and narrow molecular weight distribution.
2. Higher liquidity.
3. Excellent fiber-forming performance, which can make the fiber elongation higher and the wire diameter smaller.
4. Continuous silk, dripping, better spinnability.
5. Easy to get on the machine and more stable processing performance.
6. It can be used in the production of melt-blown technology for filtering materials, oil-absorbing cotton, clothing accessories, battery diaphragms, etc.
1.To make the cloth, the fiber must be made thin, the raw material melting rate and the spinneret aperture are matched, and the spinning process is optimized, and the fiber reaches 0.3um.
2. It is necessary to match good electret equipment and select good electret masterbatch. A good electret masterbatch must have the ability to store charges and permanently generate an electric field.
3. The validity period of mask electret mainly depends on the additive content of electret masterbatch. The electret masterbatch is similar to a battery, and the addition ratio will determine its service life and adsorption capacity.
4. Store the finished melt blown cloth dry and not in contact with the humidity of the outside air. Vacuum packaging is best. The moisture in the air and the charge of the melt-blown cloth will be converted into negative ions, and the loss of charge will affect the filtration efficiency.
1.Spinneret and melt blown equipment
2. Electrostatic electret equipment
3. Long-lasting electrostatic electret masterbatch
4. Melt blown material or high melt finger fiber material
5. Professional and experienced tuning master
6. Meltblown production site management
Melt Blown Machine
1.Melt finger: polypropylene can be made into nano-sized fibers by adding peroxide thermal degradation or metallocene hydrogen modulation method, etc., polypropylene melt finger reaching a suitable higher level.
2. The melting point of the particles should be reduced to between 150-170°C.
3. After adding the electret masterbatch, the melt blown cloth will have electrostatic adsorption performance through the electret device to block the virus.
4. After the polypropylene particles are modified, the fibers sprayed by the Melt Blown Machine at high temperature and high pressure are thin and long.
5. The fluid fiber sprayed from the melt nozzle of the raw material is flexible, tough and firm.
6. High temperature sterilization and disinfection.
1.Whether the electrostatic load time can be charged for a long time for 1 year or more.
2. The electret masterbatch does not block the melt blown hole, and the melt blown cloth is loaded with electric charge. How to make the positive charge stay on the melt blown cloth for a long time? It can be a test electret mother after six months or one year without losing charge. The key indicators of grain and electret technology.
3. Long blocking period, long-term electret, PFE exceeds 95.
1.Most mainstream applications are the corona charging method for electret treatment of meltblown cloth. The charging voltage, charging time, charging distance and environmental humidity all affect the electret treatment effect. Among them, the charging voltage has the most obvious influence on the electret effect, the charging distance has a medium influence, and the charging time has the least influence. Pay attention when debugging the machine.
2. The environmental humidity has an impact on the generation and loss of static electricity. Meltblown cloth companies should always monitor the temperature and humidity in the workshop. Increase the corresponding equipment to keep the temperature and humidity of the workshop within a certain range.
1.Melt blown polypropylene is easy to be sintered and carbonized if it stays at high temperature and high pressure for a long time.
2. When adjusting the machine, the temperature must first be determined, whether the actual temperature of the barrel and mold of the melt blown machine is consistent with the set temperature. Generally, the displayed temperature of small melt blown equipment and the actual temperature will be very different.
3. If the melting point of polypropylene is 1500, if the temperature is set above 270℃, it is a bit high.
1.The configuration should be complete: extruder→screen changer→metering pump→die head→distribution plate (auxiliary hot air)→spinneret→netting device to form melt blown cloth.
2. The speed of the extruder, the parameters of the metering pump, the advantages and disadvantages of the die, the temperature and speed parameters of the hot air flow, the angle of the die, the angle of the air knife, the receiving distance of the meltblown material, the adsorption parameters under the netting device, etc. The quality of the cloth.
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