Meltblown non-woven fabric is different from traditional spunbond production. It uses high-speed hot air to stretch the polymer trickle from the spinneret of the module, turning it into an ultra-fine short. The fiber is guided to the roller and cooled by its own adhesive force to form.
Its production process is a flowing water process, from the loading and unloading of polymer materials to the melting and extrusion of the materials, after the metering pump, it uses a special nozzle module to spray, and the high-speed hot air blows the spray.
The polymer trickle coming out of the silk hole is properly stretched and guided, and after cooling, it is formed on the roller and the material is received and processed at the lower end. It is all done in one go. Any problem in any link may cause production interruption. Therefore, it is necessary for us to understand the following system components of the meltblown nonwoven production line.
The function of the extruder system is to melt the polymer slices and deliver the molten polymer to the metering pump continuously and stably. The speed of the extruder is controlled by a frequency converter, which can realize step-less speed regulation.
Melt delivery system
The melt conveying system mainly includes a melt filtering device (ie screen changer), metering pump, pipeline, and high-temperature melt temperature and pressure sensor. Its function is to transfer the molten polymer in the extruder to the die continuously and stably through the precise metering of the metering pump after rough filtration.
The core device of the spinning system is the die. Its function is to spray the molten polymer with a certain pressure from the extruder through the spinneret, and at the same time, under the action of the high temperature and high-speed airflow on both sides of the spinneret, it forms superfine fiber.
Air system: The system includes two subsystems
(1) Hot air drafting system
The main equipment of the system includes a Roots blower, heated air tank, and pipes. The function of this system is to transport the compressed hot air to the die through the pipe and then spray it from the air gaps on both sides of the die to realize the drafting of the molten polymer sprayed from the spinneret. The pressure and temperature of the compressed air should be determined according to the properties of the raw materials used and the surrounding environment.
(2) Vacuum suction system
The vacuum suction device is installed under the receiving net curtain of the receiving device. The device mainly includes an airflow equalization box, a pipe, and a suction fan. Its function is to make the fibers formed by the high-speed and high-temperature drafting air flow evenly spread on the receiving net curtain to prevent wire skipping.
Web Forming System: This system is mainly composed of two subsystems:
(1) Receiving device system
The device mainly includes a receiving net curtain, a roller, and a hand wheel for correcting the deviation of the receiving net curtain. Its function is to uniformly collect the superfine fibers formed by high-speed and high-temperature air drafting on the web forming curtain (or on the roller) of the receiving device, and make the receiving web curtain not deviate.
(2) Winding and slitting system
The system mainly includes a slitting machine and a winding machine. The function is to cut the meltblown nonwoven material formed on the receiving screen and wind it into a roll.
This is mainly used to support the various components of the production line.
Electrostatic electret system
Digital controlled 60Kv high-voltage electrostatic generator, with self-recovery over-voltage and over-current protection; electrostatic electret loading roller and electrode device.
(1) Through the frequency converter, the precise control of the speed of the extruder, metering pump, receiving screen, and the rolling roll is realized, and at the same time, the precise control of the output airflow of the Roots blower is realized through the frequency converter.
(2) Through the high-temperature melt temperature control sensor, the extruder, screen changer, metering pump, melt conveying pipeline, and die heating device can be accurately controlled to achieve the temperature of each part within the set temperature range Inside, making production stable.
(3) Adjust the speed of extruder and metering pump through high-temperature melt pressure sensor and frequency conversion to realize the control of extruder head pressure and pressure before and after the metering pump, so as to stabilize melt pressure and make production continuous and stable. At the same time, through the pressure display, determine the time to replace the filter screen of the screen changer and the die head filter.
If you want to learn more about the spunbond nonwoven production line after reading the above, you can contact AZX for professional advice.
With excellent R&D technology and professional products, AZX has quickly become one of the leading non-woven machine manufacturers. Our professional production team and strict quality inspection system can provide customers with safe and high-quality products. At the same time, we put the needs of customers first, which can improve the thoughtful one-stop service and effective solution technology. If you are interested in our automated anti-adhesive non-woven equipment, please contact us immediately!