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Electret high-melt-index polypropylene master batch and preparation method thereof

A polypropylene, high-body technology, applied in the field of electret high-melting index polypropylene masterbatch and its preparation, can solve the problems of increasing the electrostatic adsorption and negative ion sterilization ability of melt-blown cloth, the material is difficult to disperse, and the nozzle is easy to block, and achieves Avoid the problem of nozzle clogging, improve the filtering effect and reduce the resistance effect

Inactive Publication Date: 2020-11-13
海泰伲克(天津)实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to overcome the shortcomings in the prior art, provide an electret high-melting index polypropylene masterbatch and its preparation method, which can solve the problems of difficult dispersion, easy nozzle blockage, instability and easy drift of a single polypropylene particle material ;Increase the ability of electrostatic adsorption and negative ion sterilization of melt-blown cloth, and effectively block droplets, dust, viruses, etc. below microns

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0039] Another embodiment of the present application provides a method for preparing an electret high melting point polypropylene masterbatch, the steps comprising:

[0040] 101. Mixing the raw materials;

[0041] Mix polypropylene powder and di-tert-butyl peroxide evenly in a low-speed mixer;

[0042] Put in nucleating agent, antioxidant, lubricant and dielectric, mix and disperse evenly in a low-speed mixer.

[0043] 102. Feed the mixed material into the extruder;

[0044] The extruder is a twin-screw extruder, the length-to-diameter ratio of the twin-screw extruder is 48-60, the temperature of the extruder barrel is set at 160-265°C; the screw speed is 300-600 rpm, and the feeder speed is 28-48HZ, polypropylene undergoes free radical degradation reaction under the action of organic peroxide initiator, high temperature melting and screw shearing, and complete degradation will not block the spinneret.

[0045] 103. Carry out vacuum devolatilization treatment on the materia...

Embodiment 1

[0053] Example 1: 50kg of polypropylene powder (grade 230 powder) and 600ml of di-tert-butyl peroxide were mixed evenly in a low-speed mixer, and 150 grams of compounded transparent nucleating agent, 200 g of antioxidant 1010, and 150 g of lubricant FFB were added , 75g dielectric, 50kg polypropylene powder (grade 230 powder) are mixed evenly and dispersed in the low-speed mixer of the mixer, and the mixed material is fed to the extruder through the hopper of the intermediate feeding system;

[0054] The aspect ratio of the twin-screw extruder is 48-60; the barrel temperature of the extruder is set at 160-250°C; the screw speed is 300-600 rpm, and the feeder speed is 28--48 Hz; polypropylene Under the action of organic peroxide initiator, high temperature melting and screw shearing, free radical degradation reaction occurs, complete degradation will not block the spinneret.

[0055] Vacuum devolatilization controls the vacuum degree at -0.12~-0.08MPa, exhausts devolatilization...

Embodiment 2

[0061] Example 2: 50kg of polypropylene powder (grade 230 powder) and 700ml of di-tert-butyl peroxide are mixed evenly in a low-speed mixer, and 200 grams of compound transparent nucleating agent, 250g of 1010 antioxidant, and 200g of lubricant FFB are added Mix and 100g dielectric in the low-speed mixer of the mixer and disperse evenly, and the mixed material is fed to the extruder through the hopper of the intermediate feeding system;

[0062] The aspect ratio of the twin-screw extruder is 48-60; the barrel temperature of the extruder is set at 160-250°C; the screw speed is 300-600 rpm, and the feeder speed is 28--48 Hz; polypropylene Under the action of organic peroxide initiator, high temperature melting and screw shearing, free radical degradation reaction occurs, the molecular weight changes from high to low, and the melt index changes from low to high;

[0063] Vacuum devolatilization controls the vacuum degree at -0.12~-0.08MPa, exhausts devolatilization and stabilizat...

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Abstract

The invention provides an electret high-melt-index polypropylene master batch and a preparation method thereof. The electret high-melt-index polypropylene master batch is prepared from the following components in percentage by weight: 95%-99% of polypropylene powder; 0.3%-2% of di-tert-butyl peroxide; 0.1%-0.3% of a nucleating agent; 0.2%-1% of an antioxidant; 0.1%-0.5% of a lubricant; and 0.2%-1%of a dielectric medium. The preparation method comprises the following steps: mixing raw materials; feeding the mixed materials into an extruder; carrying out a vacuum de-volatilization treatment onthe materials in the extruder; cooling, molding, dicing; sieving, transferring, and drying. The problems of difficult dispersion, easy nozzle blockage, instability and easy drifting of a single polypropylene particle material can be solved; the electrostatic adsorption and negative ion sterilization capabilities of melt-blown cloth are improved, and droplets, dust, and viruses with a size less than microns are effectively blocked.

Description

technical field [0001] The application relates to the technical field of polymer materials, in particular to a kind of electret high melting point polypropylene masterbatch and a preparation method thereof. Background technique [0002] Studies have shown that the particles caused by pollution in the air, especially those with an aerodynamic equivalent of 2.5 microns or less, are small in size and rich in toxic and harmful substances. These particles can stay in the air for a long time and are easily absorbed into the body to cause respiratory diseases, lung injury, carcinogenicity, cardiovascular disease, reproductive system, fetal development and other diseases. Therefore, in the field of air purification, people pay more and more attention to the development of materials that can adsorb these particulate matter. At present, polymer materials that can adsorb these particles after polarization have become a research hotspot. The melt-blown polypropylene fiber filter mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/04C08K5/14C08K7/00C08K3/34C08K5/134C08K5/526C08J3/22D01F6/46D01F1/10D04H1/413D04H1/4291D04H1/70B01D39/16
CPCC08J3/226D01F6/46D01F1/10D04H1/4291D04H1/413D04H1/70B01D39/1623C08J2323/12C08J2323/14C08J2423/12C08J2423/14C08K13/04C08K5/14C08K7/00C08K3/34C08K5/1345C08K5/526
Inventor 易佳胜白海军
Owner 海泰伲克(天津)实业有限公司
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