A device for preparing ultrafine fiber nonwovens by using turbulent flow

Abstract

The invention discloses a device for preparing superfine fiber non-woven fabric through turbulent flow. The device comprises a hopper. An outlet of the hopper is communicated with a heating screw, anoutlet of the heating screw is communicated with a quantitative distributing device, the quantitative distributing device is communicated with a die head, a quick-change connector is connected to thedie mold and connected with an air heater through a connecting pipe, and the air heater is communicated with a draught fan. The die head comprises an upper die, a cylindrical turbulent flow device isarranged in the upper die, a lower die is arranged under the upper die, and the lower die and the upper die are connected through a fastening device. After pressure drag brought by cylindrical turbulent flow is added, the diameter of polymer melt is reduced more continuously, the requirements of the melt-blowing process are better met, the device is high in working efficiency, good in practicalityand worthy of popularization, and energy is saved.

Description

technical field [0001] The invention belongs to the technical field of non-woven equipment, and in particular relates to a device for preparing superfine fiber non-woven fabrics by using turbulent flow. Background technique [0002] At present, the technology that can prepare non-woven ultrafine fibers is called "melt blown". Then, through the extrusion and heating of the high-temperature screw, the pellet slices are melted into a polymer melt. The polymer melt is extruded from the spinneret through the quantitative output of the metering pump, and the extruded polymer melt is blown into ultra-fine fibers by the high-temperature and high-speed airflow generated by the fan. The ultra-fine fiber preparation device is as follows: figure 2 shown. The fineness of melt-blown fibers is 1-10 microns, and it exists in the form of non-woven fabrics. The uses of melt-blown ultra-fine fibers to illegally manufacture cloth include: air conditioner filters, masks, purifier filters, etc....

AI Technical Summary

Problems solved by technology

However, after a force analysis of the effects of airflow friction resistance and pressure difference resistance, it is found that under the same conditions, pressure difference resistance has a very significant effect on the stretching of fibers, and its force on fibers is many times greater than friction resistance. , while in the traditional meltblown process, the drawing effect of the pressure difference resistance of the airflow on the polymer melt is not effectively utilized

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