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A kind of melt-blown polypropylene electret with long-term electrostatic retention and its preparation method and application

A melt-blown polypropylene and electret technology is applied in separation methods, chemical instruments and methods, and complete sets of equipment for the production of artificial lines. Increase, good temperature resistance, stable charge storage effect

Active Publication Date: 2021-04-02
道恩高材(北京)科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the charge stability and long-term performance of melt-blown polypropylene electret materials are generally improved by simply blending inorganic particles to modify polypropylene, and using other polymer electret materials such as fluororesins, but the improvement effect is not significant or high cost issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]1) 75 parts of polypropylene (homopolypropylene melt-blown material, melt index 1000g / 10min, product of Shandong Dawn Polymer Materials Co., Ltd.), 10 parts of tourmaline (particle size 70-100nm), 5 parts of ultra-fine polymer Tetrafluoroethylene powder (particle size 0.2-0.4 μm), 1 part of dibenzylidene sorbitol, 10 parts of hydrophobic nano-silica (particle size 10-30nm), 2 parts of titanium dioxide (particle size 20-50nm), 3 1 part of magnesium stearate, 0.4 part of coupling agent A-187, 0.4 part of antioxidant 1010, add high-speed stirring and mixing, add twin-screw extruder to extrude and granulate to obtain crystallization-electret masterbatch;

[0034] 2) Melt-blown polypropylene raw material (Shandong Dawn Polymer Material Co., Ltd. homopolypropylene melt-blown material, melt index 1500g / 10min) is added with more than 3% masterbatch, added to a single-screw extruder, 150-180 ° C After the temperature is mixed, it is added to the melt-blown equipment, pumped into ...

Embodiment 2

[0038] 1) 70 parts of polypropylene (homopolypropylene melt-blown material, melt index 1000g / 10min, product of Shandong Dawn Polymer Materials Co., Ltd.), 15 parts of tourmaline (particle size 70-100nm), 10 parts of ultra-fine polymer Tetrafluoroethylene powder (particle size 0.2-0.4 μm), 2 parts of dibenzylidene sorbitol, 8 parts of hydrophobic nano-silica (particle size 10-30nm), 4 parts of magnesium stearate, 0.5 parts of coupling agent A-187, 0.4 parts of antioxidant 1010, add high-speed stirring and mixing, add twin-screw extruder to extrude and granulate to obtain crystallization-electret masterbatch;

[0039] 2) Melt-blown polypropylene raw material (Shandong Dawn Polymer Material Co., Ltd. homopolypropylene melt-blown material, melt index 1500g / 10min) is added with more than 2% masterbatch, added to a single-screw extruder, 150-180°C After the temperature is mixed, it is added to the melt-blown equipment, pumped into the spinneret through the melt pump, the temperature...

Embodiment 3

[0043] 1) 70 parts of polypropylene (homopolypropylene melt-blown material, melt index 1000g / 10min, product of Shandong Dawn Polymer Materials Co., Ltd.), 5 parts of tourmaline (particle size 70-100nm), 20 parts of ultra-fine polymer Tetrafluoroethylene powder (particle size 0.2-0.4 μm), 2 parts of dibenzylidene sorbitol, 5 parts of hydrophobic nano-silica (particle size 10-30nm), 2 parts of magnesium stearate, 0.3 parts of coupling agent A-187, 0.4 parts of antioxidant 1010, add high-speed stirring and mixing, add twin-screw extruder to extrude and granulate to obtain crystallization-electret masterbatch;

[0044] 2) Melt-blown polypropylene raw material (Shandong Dawn Polymer Material Co., Ltd. homopolypropylene melt-blown material, melt index 1500g / 10min) is added with more than 2% masterbatch, added to a single-screw extruder, 150-180°C After the temperature is mixed, it is added to the melt-blown equipment, pumped into the spinneret through the melt pump, the temperature ...

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PUM

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Abstract

The invention belongs to the field of high polymer materials, and provides a long-acting electrostatic holding meltblown polypropylene electret and a preparation method and an application thereof. Themeltblown polypropylene electret provided by the invention contains blended master batch and meltblown polypropylene; the master batch contains a matrix material, an electret filler, a modifier, a dispersing agent, a coupling agent and an antioxidant, wherein the matrix material is polypropylene; the electrets filler is tourmaline and / or a fluorine-containing polymer, and the modifier is a nucleating agent. The meltblown polypropylene electret provided by the invention is obtained by adding the master batch into the meltblown polypropylene for spinning and by passing through a corona electrets, and the obtained meltblown polypropylene electrets material is stable in charge storage, high in filtering efficiency and high in temperature resistance.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a long-term electrostatically maintained melt-blown polypropylene electret, a preparation method thereof and its application to filter materials. Background technique [0002] The short storage period of the mask is mainly due to the poor anti-aging performance of the melt-blown polypropylene of the melt-blown layer (M layer, that is, the filter layer), and the electrostatic and antibacterial effects are greatly attenuated in about 4 months, which is not suitable for long-term storage. There is a huge shortage of masks and medical protective clothing. Therefore, carrying out research on the preparation technology of electrostatically charged, long-lasting antibacterial, and ultra-long aging-resistant melt-blown grade polypropylene is the key to implementing the national policy of "the national collection and storage of masks and protective clothing" proposed by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/10B01D39/14D01D13/00D04H1/4291D04H1/4382D04H1/541D04H1/72
CPCB01D39/14B01D2239/04B01D2239/0435B01D2239/10D01D13/00D01F1/10D01F6/46D04H1/4291D04H1/4382D04H1/541D04H1/72
Inventor 张世甲卢咏来田洪池徐雪梅韩吉彬陈文泉王媛韩丽丽张立群
Owner 道恩高材(北京)科技有限公司
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