Heat-conducting high density polyethylene composite material and preparation method as well as application thereof

A technology of high-density polyethylene and composite materials, which is applied in the field of engineering plastics, can solve problems such as the reduction of mechanical properties of composite materials and limit the application of thermally conductive composite materials, and achieve the effects of low cost, high thermal conductivity and mechanical properties, and simple operation

Inactive Publication Date: 2012-01-11
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, due to the addition of a large amount of thermally conductive fillers, the mechanical properties of the composite material are significantly reduced, which limits the application of thermally conductive composite materials

Method used

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  • Heat-conducting high density polyethylene composite material and preparation method as well as application thereof
  • Heat-conducting high density polyethylene composite material and preparation method as well as application thereof
  • Heat-conducting high density polyethylene composite material and preparation method as well as application thereof

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preparation example Construction

[0024] see figure 1 , figure 1 Show the flow chart of the method for preparing a thermally conductive high-density polyethylene composite material according to an embodiment of the present invention, including the following steps:

[0025] In step S01, an active thermally conductive filler is prepared

[0026] Mix the inorganic heat-conducting agent and the coupling agent according to the mass ratio of 95-98%: 2-5%, and stir for 5-10 minutes at a temperature of 90-110°C to obtain the active heat-conducting filler;

[0027] S02, mixed

[0028] Mix the following components in mass percentage to obtain a mixture;

[0029]

[0030] S03, extrusion processing

[0031] The mixture is extruded at a temperature of 150-180° C. to obtain a thermally conductive high-density polyethylene composite material.

[0032] Specifically, the heat-conducting high-density polyethylene, lubricant, antioxidant, inorganic heat-conducting agent and coupling agent are the same as those described ...

Embodiment 1

[0046] The preparation method of the high-density polyethylene composite material of the embodiment of the present invention comprises the following steps:

[0047] 90% by mass of HDPE, 5% by mass of active thermally conductive filler, 3% by mass of maleic anhydride grafted high-density polyethylene, 1% by mass of lubricating agent, the mass percent content is 1% antioxidant and mixes uniformly in the high-speed mixer, and wherein this maleic anhydride grafted high-density polyethylene is self-made maleic anhydride grafted high-density polyethylene;

[0048] Put the mixed material into the hopper of the twin-screw extruder, melt and blend, extrude and granulate to obtain a high-density polyethylene composite material, wherein the temperature settings of each zone of the screw are: Zone 1 temperature: 120-130 ℃; Zone 2 temperature: 130~140℃; Zone 3 temperature: 140~150℃; Zone 4 temperature: 140~170℃; Zone 5 temperature: 140~170℃; Zone 6 temperature: 140~170℃; : 140~170℃; eight...

Embodiment 2

[0050] The preparation method of the high-density polyethylene composite material of the embodiment of the present invention comprises the following steps:

[0051] 82% by mass of HDPE, 10% by mass of active thermally conductive filler, 5% by mass of maleic anhydride grafted high-density polyethylene, 1.5% by mass of lubricating agent, a mass percent content of 1.5% antioxidant is mixed uniformly in a high-speed mixer, wherein the maleic anhydride grafted high-density polyethylene is a self-made maleic anhydride grafted high-density polyethylene;

[0052] The mixed materials are put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated into alloy materials. Among them, the temperature setting of each zone of the screw is as follows: first zone temperature: 120-130°C; second zone temperature: 130-140°C; third zone temperature: 140-150°C; fourth zone temperature: 140-170°C; fifth zone temperature: 140 ~170°C; Six-zone temperature: 140-170°C; Se...

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Abstract

The invention is applicable to the technical field of engineering plastic, and provides a heat-conducting high density polyethylene (HDPE) composite material and a preparation method as well as application thereof. The heat-conducting high density polyethylene composite material comprises the following components in percentage by mass: 70-90 percent of high density polyethylene, 5-20 percent of active heat-conducting filler, 3-7 percent of maleic anhydride-drafted high density polyethylene, 1-2 percent of lubricating agent and 1-2 percent of antioxidant, wherein the maleic anhydride-drafted high density polyethylene indicates a compound of maleic anhydride-drafted polyethylene. In the heat-conducting high density polyethylene composite material, surface active treatment is performed on the filler, the compound of the maleic anhydride-drafted polyethylene is used as the maleic anhydride-drafted high density polyethylene (particularly self-made maleic anhydride-drafted high density polyethylene), the filler can be uniformly dispersed in an HDPE substrate, and the prepared composite material also has high heat conductivity and mechanical property. The preparation method in the embodiment of the invention is easy to operate, low in cost and suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a heat-conducting high-density polyethylene composite material, its preparation method and application. Background technique [0002] Generally, there are two ways to improve the thermal conductivity of plastics. One is to synthesize structural plastics with high thermal conductivity, such as polyacetylene, polyaniline, polypyrrole, etc., with good thermal conductivity, but the synthesis process is cumbersome and the design is not flexible; the other The first is to fill the plastic with high thermal conductivity fillers, and use the method of melt blending to obtain low-cost, easy-to-form thermal-conductive plastics, which can be used in some special fields after proper processing. Therefore, the method of melt blending is often used to prepare composite materials with high thermal conductivity. [0003] During the melt blending process, some materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L51/06C08K13/06C08K9/04C09K5/14B29C47/92B29C48/92
Inventor 徐东徐永马旭辉
Owner SHENZHEN KEJU NEW MATERIAL
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