Preparation method of superfine fiber melt-blown cloth

A technology of ultra-fine fiber and melt-blown cloth, which is applied in the directions of melt spinning, fiber processing, non-woven fabrics, etc., can solve the problems of high fiber difficulty, difficulty in filtration efficiency reaching 99.99%, and the filtration effect cannot meet the demand, etc. The effect of performance improvement

Inactive Publication Date: 2021-02-12
武汉多戈科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the melt-blown non-woven fabric forming process, commonly used equipment generally includes screw extruder, melt filter, gear metering pump, melt nozzle and receiving device, and the screw extruder transports the melt to the melt filter Afterwards, the filtered melt is transported to the gear metering pump, metered and transported to the melt nozzle, and the melt is sprayed to the receiving device under the pressure cooperation of the air

Method used

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  • Preparation method of superfine fiber melt-blown cloth
  • Preparation method of superfine fiber melt-blown cloth
  • Preparation method of superfine fiber melt-blown cloth

Examples

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Effect test

preparation example Construction

[0022] figure 1 It is a flow chart of a common preparation device for melt-blown non-woven fabrics. As shown in the figure, it includes a screw extruder 1, a melt filter 2, a gear metering pump 3, a melt-blown die head assembly and a receiving device. The general process is First place the raw material slices in the hopper of the screw extruder, and after melting, the melt is transported to the melt filter, and then the filtered melt is transported to the gear metering pump, and the metering is transported to the melt-blown die head assembly. 4 The air holes on both sides of the spinneret hole are pressurized to eject the melt, and the air holes on both sides of the spinneret hole of the melt nozzle 11 are pressurized and filled with air by the external air compressor 6 and the air heater 7, The receiving device receives and forms the non-woven fabric, and the receiving device can choose a condensing net curtain or a roller, preferably using a mesh belt receiver 10 and a suppo...

Embodiment 1

[0028] A preparation method of superfine fiber melt-blown cloth, comprising the following steps:

[0029] 1) Supercritical infiltration: such as figure 2 As shown, the particles made of PP material commonly used in the melt blown process are placed in the high-pressure reactor body, and the carbon dioxide enters the preheating storage tank through the booster pump from the gas storage tank through the condensation conveying device, is heated into gas, and then pressurized into the In the kettle body, the temperature in the kettle body is raised, and the pressure is increased to 13Mpa, and the temperature is about 52°C, so that the carbon dioxide is in a supercritical state and maintained for 3 hours. After that, the gas in the kettle body is quickly emptied, and the PP particles are placed in the air for 3 hours, and the treatment is completed. .

[0030] 2) Place the treated PP particles in figure 1 In the hopper of the screw extruder shown in , set the temperature of each...

Embodiment 2

[0033] A preparation method of superfine fiber melt-blown cloth, comprising the following steps:

[0034] 1) Supercritical infiltration: such as figure 1 As shown, the particles prepared by PET material polyester commonly used in the melt blown process are placed in the high-pressure reactor body, and the carbon dioxide enters the preheating storage tank through the booster pump from the gas storage tank through the condensation conveying device, and is heated into gas, and then added The pressure enters the kettle body, and the temperature in the kettle body is raised, and the pressure is increased to 14Mpa, and the temperature is about 35°C, so that the carbon dioxide is in a supercritical state and maintained for 4 hours. Finished.

[0035] 2) Place the treated PET particles in figure 1In the hopper of the screw extruder shown in , set the temperature of each zone of the extruder, the temperature of zone 1 is 170°C, the temperature of zone 2 is 210°C, the temperature of z...

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Abstract

The invention discloses a preparation method of a superfine fiber melt-blown fabric. The preparation method comprises the following step: carrying out supercritical carbon dioxide permeation treatmenton raw material particles suitable for a melt-blown non-woven fabric; and carrying out melt-blowing by taking the particles prepared in the previous step as raw materials, arranging a high-voltage electrostatic field between a melt-blowing nozzle and a receiving device, and stretching a melt sprayed from the melt-blowing nozzle onto the receiving device by electrostatic traction. The inventor accidentally finds in tests that after the raw material particles of the melt-blown non-woven fabric are subjected to supercritical carbon dioxide permeation treatment, a large number of micro-bubble holes can appear in the surface of fiber yarn obtained through re-melt-blowing, the specific surface area is increased, the porosity is increased, the filtering performance of the melt-blown fabric formed by the fiber yarn is greatly improved, in addition, the plasticizing performance of fluid sprayed out from the melt-blowing nozzle is enhanced, the melt-blown fabric formed by superfine fibers can be easily formed through traction and stretching of the high-voltage electrostatic field, and the filtering performance of the melt-blown fabric is further improved.

Description

technical field [0001] The invention relates to the technical field of preparation of melt blown cloth, in particular to a preparation method of ultrafine fiber melt blown cloth. Background technique [0002] In the melt-blown non-woven fabric forming process, commonly used equipment generally includes screw extruder, melt filter, gear metering pump, melt nozzle and receiving device, and the screw extruder transports the melt to the melt filter Afterwards, the filtered melt is transported to the gear metering pump, metered and transported to the melt nozzle, and the melt is sprayed to the receiving device under the pressure cooperation of the air holes on both sides of the spinneret hole of the melt nozzle, and the formed non-woven fiber diameter is It is generally higher than 3 μm, NaCl particle filtration detection, flow rate 85L / min, for 0.3um particles, double-layer fiber cloth with a unit area of ​​50g, its filtration efficiency is difficult to reach 99.99%, the filtrat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D04H1/56D01D5/098D01D5/247D01F1/08
CPCD01D5/098D01D5/0985D01D5/247D01F1/08D04H1/56
Inventor 秦柳马文良郭珍梁宇光
Owner 武汉多戈科技有限公司
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