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Now that the new coronavirus is sweeping the world, it is imperative to fully expand the production of masks. At present in China, the equipment for producing PP meltblown fabrics is in short supply. All kinds of equipment for producing PP meltblown cloth with high stability and reliability, with high output and high cost performance, welcome to consultation.
The production of polypropylene PP medical-grade masks with excellent filtration capacity needs to go through the following three main production steps.
The first production step is to feed the polypropylene PP raw material, mixed with a certain proportion of free radical initiator (DCPD), lubricant (Erucyl amide) and antioxidant, into a feeding hole of a parallel twin screw extruder to be compounded, to get a ultra-high melt index MFI 1500 which is suitable for the raw material to make mask fabric by a melt-blown process way, referred to as the high melt index PP melt-blown material.
According to the different output requirements, the suppliers can provide multi-model parallel twin-screw compounding production lines with L/D52~56.
Main Parameters of Twin Screw Extruder for PP Melt blown Production
PP Meltblown Cloth Width
Daily Capacity
Single Extruder Model
600mm
180kg
SJ-45/33
800mm
300kg
SJ-55/33
1600mm
1500kg
SJ-90/33
2400mm
2500kg
SJ-105/33
3200mm
4000kg
SJ-135/33
The second production step is to feed PP meltblown raw material, which or purchased, or self-made, mixed with a certain stabilizer, whitening agent and masterbatch, into a feeding hole of a single screw extruder. With a cooperation of auxiliary devices such as netting, metering pump, spinneret, and winder, PP melt-blown fabrics with different widths are manufactured.
Single screw extruder parameters for PP meltblown cloth production
PP Meltblown Cloth Width
Daily Capacity
Single Extruder Model
600mm
180kg
SJ-45/33
800mm
300kg
SJ-55/33
1600mm
1500kg
SJ-90/33
2400mm
2500kg
SJ-105/33
3200mm
4000kg
SJ-135/33
The third process step is to use PP meltblown fabric as a raw material to produce various masks, which will not be repeated here.
