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
CN112359486AInactive Publication Date: 2021-02-12武汉多戈科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
武汉多戈科技有限公司
Publication Date
2021-02-12
Estimated Expiration
Not applicable · inactive patent

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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.
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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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