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Melt-blow nozzle and fiber preparation device

A nozzle and meltblown technology, applied in melt spinning, textile and papermaking, spinneret assemblies, etc. Problems such as increased processing difficulty, to achieve the effect of reducing processing difficulty, reducing diameter, and improving stretching effect

Pending Publication Date: 2018-10-19
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the pointed nozzle is that the processing accuracy of the pointed nozzle is very high, and the processing of the spinneret hole is difficult
Reducing the diameter of the spinneret hole and increasing the aspect ratio of the spinneret hole can also reduce the fiber diameter, but both will increase the processing difficulty of the spinneret hole, and the too small diameter of the spinneret hole will also make the raw material adaptability of the melt blown technology change. Difference

Method used

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  • Melt-blow nozzle and fiber preparation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The polymer melt is extruded from the annular spinneret holes to form filaments, the high-speed first airflow is ejected from the first airflow passage, and at the same time, the high-speed second airflow is ejected from the second airflow passage. Wherein, the included angle of two second airflow channels is 60 °, the outlet width e of the second airflow channel is 0.6mm, the diameter c of the first airflow channel is 0.1mm, and the difference d of the inner and outer radii of the annular spinneret holes is 0.35mm. Provide raw material polypropylene, the melt flow rate of polypropylene is 1000g / 10min, the flow rate of polypropylene is 0.022g / s, the initial temperature of polypropylene is 290°C, the pressure of the first airflow is 350kPa, and the pressure of the second airflow is 150kPa , The gas pressure of the existing melt-blown double-slot nozzle is 500kPa, and the initial gas temperature is 310°C.

[0051] The average diameter of the melt-blown fibers prepared un...

Embodiment 2

[0053] The polymer melt is extruded from the annular spinneret holes to form filaments, the high-speed first airflow is ejected from the first airflow passage, and at the same time, the high-speed second airflow is ejected from the second airflow passage. Wherein, the included angle of two second airflow channels is 60 °, the outlet width e of the second airflow channel is 0.6mm, the diameter c of the first airflow channel is 0.8mm, and the difference d of the inner and outer radii of the annular spinneret holes is 0.53mm. Provide raw material polypropylene, the melt flow rate of polypropylene is 75g / 10min, the flow rate of polypropylene is 0.006g / s, the initial temperature of polypropylene is 310°C, the pressure of the first airflow is 260kPa, and the pressure of the second airflow is 190kPa , The gas pressure of the existing melt-blown double-slot nozzle is 450kPa, and the initial gas temperature is 380°C.

[0054] The average diameter of the melt-blown fibers prepared unde...

Embodiment 3

[0056] The polymer melt is extruded from the annular spinneret holes to form filaments, the high-speed first airflow is ejected from the first airflow passage, and at the same time, the high-speed second airflow is ejected from the second airflow passage. Wherein, the included angle of two second airflow passages is 60 °, the outlet width e of the second airflow passage is 0.6mm, the diameter c of the first airflow passage is 0.2mm, and the difference d of the inner and outer radii of the annular spinneret holes is 0.36mm. Provide raw material polypropylene, the melt flow rate of polypropylene is 800g / 10min, the flow rate of polypropylene is 0.031g / s, the initial temperature of polypropylene is 280°C, the pressure of the first airflow is 350kPa, and the pressure of the second airflow is 200kPa , The gas pressure of the existing melt-blown double-slot nozzle is 550kPa, and the initial gas temperature is 300°C.

[0057] The average diameter of the melt-blown fibers prepared und...

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Abstract

The invention discloses a melt-blow nozzle and a fiber preparation device. The melt-blow nozzle comprises a first air flow channel used for jetting a first air flow, a circular spinneret hole which sleeves the first air flow channel and used for jetting spinning strips and a second air flow channel located on the outer side of the circular spinneret hole and used for jetting a second air flow, wherein the first air flow and the second air flow are both used for stretching the spinning strips. In the melt-blow nozzle, the first air flow forms an air flow field in the spinning strips, the secondair flow applies action outside the spinning strips, that is, the first air flow and the second air flow jointly stretch the spinning strips from the inside and the outside of the spinning strips, compared with the prior art that only the air flow outside the spinning strips is adopted to stretch the spinning strips, the stretching effect is effectively improved, and accordingly the diameter of melt-blow fiber is reduced. Only the first air flow channel needs to be arranged on the basis of the original melt-blow nozzle, no other changes need to make, the machining difficulty of the melt-blownozzle is effectively reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fiber preparation, more specifically, to a melt blowing nozzle and a fiber preparation device. Background technique [0002] Non-woven fabrics refer to sheet-like products made directly from fibers without the usual spinning and weaving process, commonly known as non-woven fabrics. The advantages of nonwovens are short process flow, high production speed, and wide product uses. The melt blown method is a method mainly used to prepare ultrafine fiber nonwovens. The meltblown method uses high-speed, high-temperature airflow to stretch polymer melt into ultrafine fibers. Microfibers have a diameter between 1 μm and 5 μm. Melt-blown nonwovens are widely used in medicine, metallurgy, electronics, chemical industry, food, machinery, nuclear industry, automobile, etc. due to their ultra-fine fibers, many pores, and small pore size. It can also be used as an advanced filter material for environmental purifica...

Claims

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Application Information

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IPC IPC(8): D01D4/02D01D5/098
CPCD01D4/02D01D5/0985Y02P70/62
Inventor 陈廷吴丽莉叶雨薇
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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