Nanjing HONE Twin Screw Extruder PP Meltblown Material Production Line


PP meltblown materials are mainly used in medical and health care, clean materials, thermal insulation and sound insulation cotton, oil absorption materials, battery separators, air filtration, and daily necessities. The most important protective data masks, whether N95 or disposable masks, mainly include inner and outer spunbond layers (S layers) and middle meltblown layers (M layers), which are the heart parts of masks, the main function is to block and adsorb particles and droplets. The main material of M layer is PP meltblown material, which is characterized by high melt index, low molecular weight, high stability, low odor, and high strength fiber web structure. The main brands are distinguished by melt index. Most of the mask materials are 1500 brands with an average molecular weight of 50000-80000. The physical properties are almost the same as those of polypropylene plastic particles. The performance index includes melt index, molecular weight distribution, yellow index, anti-aging time, etc.

The PP meltblown material required for the production of meltblown non-woven fabrics is partially depolymerized by adding peroxide to polypropylene, and the melt index MI is about 1500. Meltblown non-woven fabric has melt spinning performance. It is a kind of superfine electrostatic fiber cloth, which can capture dust. When droplets containing pneumonia virus approach the meltblown non-woven fabric, they will be electrostatically adsorbed on the surface of the non-woven fabric and cannot pass through. It can be used for the ultra-important filter layer (M layer) in the mask, mainly to isolate droplets, particles, acid mist, microorganisms, etc.

Parallel co-rotating twin-screw extruder is the key equipment for the production of PP spray melt. In the process of depolymerization of polypropylene in the twin screw, the precision must be strictly controlled, the liquid peroxide with accurate ratio must be added, and the intensity of melt mixing in the process must be fully controlled.

The twin-screw extruder produced by Nanjing Hanyi Machinery and Electronics Co., Ltd. has a high-precision filtration system, reasonable extruder head runner design and die discharge structure, which is convenient for extrusion granulation.

nanjing hanyi machinery and electronics co., ltd., 20 years specializing in the production of twin screw mixing extruder production line, can be used for masks special pp spray melt material production.

  

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