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Melt-blown material with high oily particle filtering efficiency, and preparation method and application of melt-blown material

A particle filtration efficiency and oily technology, applied in the medical and health field, can solve the problems of large difference in effect, low filtration efficiency, poor filtration effect of oily particles, etc., and achieve long charge retention time, uniform filtration efficiency and long retention time.

Pending Publication Date: 2020-11-10
DONGGUAN HONOUR E P
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the extrusion process of the existing meltblown materials is easy to block the die head, the meltblown cloth has poor toughness, low filtration efficiency, uneven distribution of filtration effect, poor filtration effect on oily particles, and long retention time of filtration efficiency. Short and other defects, improve the problem of uneven filtration efficiency and large difference in effect of materials in different equipment and dies, provide a high oil particle filtration efficiency melt-blown material and its preparation method and use

Method used

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  • Melt-blown material with high oily particle filtering efficiency, and preparation method and application of melt-blown material

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preparation example Construction

[0034] A preparation method of a high oil particle filtration efficiency melt-blown material, the steps are as follows:

[0035] Step 1: Ultrasonic crush tourmaline powder and fluoropolymer in a solvent, add oleophobic agent and mix evenly to obtain compound electret agent, filter, dry, and pulverize to obtain powdery particles.

[0036] Step 2: Put the ultra-high flow polypropylene and antioxidant into the mixer for pre-mixing for 150s; put the mixed polypropylene into the twin-screw extruder, in which the compound electret agent is mainly added through the side feeding port, extruded The melt-blown material with high oil particle filtration efficiency can be obtained.

[0037] The production process of the melt-blown cloth is as follows: melt-blown equipment, the diameter of the screw is 60mm, the screw has 6 temperature-controlled heating zones, the die head is a single die head, the number of spinneret holes is 156, and the diameter of the spinneret holes is 0.2mm;

[003...

Embodiment 1

[0042] The preparation method of the melt blown material with high oily particle filtration efficiency in Example 1 follows the following steps: Step 1: ultrasonically crush 20% tourmaline powder and 50% fluoropolymer in a solvent, and add 30% oleophobic agent Mix evenly to obtain compound electret agent, filter, dry, and grind to obtain powdery particles. Step 2: Put 98.5% ultra-high flow polypropylene and 0.5% antioxidant into the mixer for pre-mixing for 150s; put the mixed polypropylene into the twin-screw extruder, of which 1% composite electret agent mainly passes through the side The feed port is added and extruded to obtain a melt-blown material with high oily particle filtration efficiency.

Embodiment 2

[0043] The preparation method of the high oil particle filtration efficiency melt-blown material of embodiment 2 is as follows: step 1: 20% tourmaline powder and 60% fluoropolymer are ultrasonically crushed in a solvent, and 20% oleophobic agent is added Mix evenly to obtain compound electret agent, filter, dry, and grind to obtain powdery particles. Step 2: put 99.4% ultra-high flow polypropylene and 0.1% antioxidant into the mixer for pre-mixing for 150s; put the mixed polypropylene into the twin-screw extruder, of which 0.5% composite electret agent mainly passes through the side The feed port is added and extruded to obtain a melt-blown material with high oily particle filtration efficiency.

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Abstract

The invention discloses a melt-blown material with high oily particle filtering efficiency, and a preparation method and application of the melt-blown material. The melt-blown material comprises the following raw materials in parts by weight: ultra-high-flowability polypropylene, an antioxidant and a compound electret, wherein the compound electret is composed of, in parts by weight, tourmaline powder, a fluorine-containing polymer and an oleophobic agent. The melt-blown material and the preparation method and application thereof are directed at the defects that a die head is easy to block inthe extrusion process of an existing melt-blown material, the filtering efficiency of oily particles is low, filtering efficiency retention time is short and the like, and overcome the problems that the material has non-uniform filtering efficiency in different equipment and mouth dies and is large in effect difference.

Description

technical field [0001] The invention relates to the field of medical and health technology, in particular to a high-efficiency oily particle filtration melt-blown material and its preparation method and application. Background technique [0002] At present, the technology of producing melt-blown cloth mainly adopts the chemical degradation method of polypropylene to obtain melt-blown polypropylene (PP), and then adds electret masterbatch through physical mixing. This method has poor compatibility between electret masterbatch and melt-blown PP, and the dispersion is not uniform enough. During the spinning process, it is easy to block the die head, and the surface of the melt-blown cloth is easy to produce crystal points, the toughness of the melt-blown cloth is reduced, and it is easy to lose part of the electrostatic effect, which makes the filter efficiency of the produced melt-blown cloth low, and the same material is used in different equipment. If it is made with the die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L27/12C08K3/38B01D39/08A41D13/11
CPCC08L23/12B01D39/083A41D13/11
Inventor 许永昌曹建伟迟胜南蒙学阳
Owner DONGGUAN HONOUR E P
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