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Heat-conductive electromagnetic-shielding polypropylene composite material and preparation method of same

A composite material and electromagnetic shielding technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as complex construction, high density, and difficult molding, and achieve high equipment efficiency, excellent processing performance, and improved thermal conductivity. The effect of electromagnetic shielding performance

Inactive Publication Date: 2018-12-04
杭州高兴工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The materials used for electromagnetic shielding are mainly ferromagnetic materials, ferroelectric materials, conductive polymer materials, conductive coatings, etc. The commonly used electromagnetic shielding materials are mainly metals, which are generally used in the form of plates, strips or coatings. These materials are widely used But there are also some shortcomings, such as high density, complex construction, and difficult molding, so the development of materials with light weight and good electromagnetic shielding performance has high use value

Method used

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  • Heat-conductive electromagnetic-shielding polypropylene composite material and preparation method of same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A heat-conducting electromagnetic shielding polypropylene material component and weight percent are 53 parts of pp resin, 5 parts of PE, 20 parts of silicon carbide, 15 parts of nanoscale graphene with a particle size of 10mm, 0.5 parts of antioxidant 168 and 1010, 1.5 parts lubricant, 5 parts compatibilizer.

[0027] Prepare the modified polypropylene material of the thermally conductive electromagnetic shielding material as follows:

[0028] A, take each raw material by weighing raw material ratio;

[0029] B, the polypropylene resin that will take by weighing, toughening agent, compatibilizer are mixed in high-speed mixer;

[0030] C. Add antioxidant and lubricant, and add conductive agent and thermal conductive agent through side feeding, and further mix evenly;

[0031] D. Send the mixed material to the twin-screw extruder for extrusion. The extrusion temperature is: the temperature of the first zone is 181°C, the temperature of the second zone is 198°C, the temp...

Embodiment 2

[0034] The mass composition ratio of a thermally conductive electromagnetic shielding polypropylene material is as follows: 52 parts of pp resin, 5 parts of PE, 19 parts of magnesium oxide, 17 parts of nano-scale carbon nanotubes with a diameter of 20 mm, and 0.5 parts of antioxidant 1010 , 1.5 parts of lubricant, 5 parts of compatibilizer.

[0035] Prepare the modified polypropylene material of the thermally conductive electromagnetic shielding material as follows:

[0036] A, take each raw material by weighing raw material ratio;

[0037] B, the polypropylene resin that will take by weighing, toughening agent, compatibilizer are mixed in high-speed mixer;

[0038] C. Add antioxidant and lubricant, and add conductive agent and thermal conductive agent through side feeding, and further mix evenly;

[0039] D. Send the mixed material to the twin-screw extruder for extrusion. The extrusion temperature is: the temperature of the first zone is 183°C, the temperature of the secon...

Embodiment 3

[0042] The mass composition ratio of a thermally conductive electromagnetic shielding polypropylene material is as follows: 51 parts of pp resin, 5 parts of PE, 18 parts of alumina, 19 parts of carbon fiber with a diameter of 2 mm, 0.5 parts of antioxidant 1098, and 1.5 parts of lubricating agent, 5 parts of compatibilizer.

[0043] Prepare the modified polypropylene material of the thermally conductive electromagnetic shielding material as follows:

[0044] A, take each raw material by weighing raw material ratio;

[0045] B, the polypropylene resin that will take by weighing, toughening agent, compatibilizer are mixed in high-speed mixer;

[0046] C. Add antioxidant and lubricant, and add conductive agent and thermal conductive agent through side feeding, and further mix evenly;

[0047] D. Send the mixed material to the twin-screw extruder for extrusion. The extrusion temperature is: the temperature of the first zone is 185°C, the temperature of the second zone is 201°C, ...

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Abstract

The invention discloses a heat-conductive electromagnetic-shielding polypropylene composite material and a preparation method of same. The composite material comprises, by weight, 40-60% of polypropylene resin, 5-10% of a toughening agent, 5-20% of a heat-conductive agent, 10-25% of an electric-conductive agent, 0.2-0.5% of an antioxidant, 0.5-1% of a lubricant, and 1-10% of a compatibilizer. Thepreparation method includes: premixing the polypropylene resin, toughening agent and compatibilizer, adding the antioxidant and lubricant, adding the heat-conductive agent and electric-conductive agent in a side-feeding manner, and performing extrusive granulation through a twin-screw extruder at 180-220 DEG C. The product is low in cost and light in weight, has excellent mechanical performance, is easy to shape, has great heat-conductive and electromagnetic-shielding properties, and can be extensively applied to the communication fields, such as electronics and telecommunications.

Description

technical field [0001] The invention relates to the technical field of polymer modified materials, in particular to a heat-conducting electromagnetic shielding polypropylene composite material and a preparation method thereof. Background technique [0002] With the rapid development of society, polypropylene plastics are widely used in various fields such as electronics, communication components and office supplies, but these components will generate a lot of heat when they are in operation. If the heat is not transferred out in time, the components will fail lifespan will be greatly reduced. The electromagnetic interference and electromagnetic radiation generated by these electronic and communication equipment are increasingly harmful to people's daily life. Therefore, it is imperative to vigorously develop materials with thermal conductivity and electromagnetic shielding, and the requirements for thermal conductivity and electromagnetic shielding materials are also increas...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L51/06C08K13/02C08K3/34C08K3/04C08K5/134C08K5/526C09K5/14
CPCC08K2201/003C08K2201/011C08L23/12C08L2205/03C09K5/14C08L23/06C08L51/06C08K13/02C08K3/34C08K3/042C08K5/1345C08K5/526
Inventor 贺热民王冰俞正标梁宁
Owner 杭州高兴工程塑料有限公司
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