Electret melt-blown polypropylene material and preparation method thereof

A technology of melt-blown polypropylene and polypropylene, which is applied in the field of electret melt-blown polypropylene materials and its preparation, can solve the problems of low surface static charge retention rate and retention time, achieve obvious market competitiveness, prevent charge loss, Effect of preventing charge drift

Pending Publication Date: 2021-10-26
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of electret melt-blown polypropylene material and preparation method thereof, to solve the problem of low electrostatic charge retention rate and retention time on the surface of polypropylene melt-blown nonwoven material in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take by weight 98.3 parts of melt-blown grade polypropylene, 1.5 parts of nanocellulose, and 0.2 parts of antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and mix After uniformity, it is fed into a twin-screw extruder from the main material inlet, and after being melted, extruded, granulated and dried, the final product is obtained. Among them, the main engine speed of the twin-screw extruder is controlled at 320rpm, and the processing temperature of each zone of the twin-screw extruder is: the temperature of the first zone is 180°C, the temperature of the second zone is 180°C, the temperature of the third zone is 200°C, and the fourth zone is 210°C. Zone 5 is 200°C.

Embodiment 2

[0018] Weigh 99.05 parts of melt-blown grade polypropylene, 0.8 parts of nanocellulose, and 0.15 parts of antioxidant tris[2.4-di-tert-butylphenyl] phosphite according to parts by weight. In the machine, after melting, extruding, granulating and drying, the final product is obtained. Among them, the main engine speed of the twin-screw extruder is controlled at 260rpm, and the processing temperature of each zone of the twin-screw extruder is: the temperature of the first zone is 180°C, the temperature of the second zone is 185°C, the temperature of the third zone is 190°C, and the fourth zone is 200°C. Zone 5 is 210°C.

Embodiment 3

[0020] Take by weight 95.25 parts of melt-blown grade polypropylene, 1.5 parts of nanocellulose, and 0.25 parts of antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and mix After uniformity, it is fed into a twin-screw extruder from the main material inlet, and after being melted, extruded, granulated and dried, the final product is obtained. Among them, the main engine speed of the twin-screw extruder is controlled at 360rpm, and the processing temperature of each zone of the twin-screw extruder is: the temperature of the first zone is 200°C, the temperature of the second zone is 210°C, the temperature of the third zone is 210°C, and the fourth zone is 220°C. Zone 5 is 220°C.

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Abstract

The invention discloses an electret melt-blown polypropylene material and a preparation method thereof. The electret melt-blown polypropylene material is prepared from, by weight, 0.5-2 parts of nano cellulose, 97.7-99.4 parts of melt-blown polypropylene and 0.1-0.3 part of an antioxidant. The nano cellulose is added into the material, the nano cellulose is distributed in a polypropylene matrix to prevent the crystalline state of polypropylene by utilizing the higher length-diameter ratio and smaller particle size of the nano cellulose, and is limited by the rod-like structure of the nano cellulose, so that polypropylene crystals distributed around the nano cellulose easily grow into a slender shape along the wall of the nano cellulose, so charge drift is effectively prevented. Meanwhile, the surface of the nano cellulose is rich in hydroxyl, has relatively high activity, effectively attracts and traps charges, and prevents charge loss. Therefore, the electron capturing capability and the lasting electrification capability of the polypropylene melt-blown non-woven material after electret treatment are improved, the filtering effect of the material is improved, and the service life of the material is prolonged.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an electret melt-blown polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene melt-blown nonwovens have the characteristics of ultra-fine fibers, large specific surface area, small voids, and high porosity. They can play the advantages of high efficiency and low resistance in general filtration, and achieve the purpose of blocking dust and bacteria and viruses. PP non-textile materials are currently widely used in medical masks, air filtration products, etc. At the same time, the market has also put forward higher requirements for materials. The commonly used treatment method is that the polypropylene meltblown nonwoven material is given a large amount of electrostatic charge on the surface of the material through corona electret treatment, which can make the surface of the meltblown filter material achieve bette...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L1/02C08K5/134C08K5/526D01F6/46D01F1/10
CPCC08L23/12D01F6/46D01F1/10C08L2203/12C08L1/02C08K5/1345C08K5/526
Inventor 杨桂生计娉婷姚晨光朱敏廖雄兵赵鑫
Owner HEFEI GENIUS NEW MATERIALS
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