A kind of conductive polypropylene composite powder for selective laser sintering and its preparation method

A composite powder and laser sintering technology, which is applied in the field of 3D printing technology and plastic processing, to achieve the effects of preventing adhesion, good dispersion and fluidity, and prolonging the service life

Active Publication Date: 2018-06-22
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of electronics or electrical appliances, it is hoped that PP powder can have good electrical conductivity while having higher mechanical properties, but there is no relevant literature report so far.

Method used

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  • A kind of conductive polypropylene composite powder for selective laser sintering and its preparation method
  • A kind of conductive polypropylene composite powder for selective laser sintering and its preparation method
  • A kind of conductive polypropylene composite powder for selective laser sintering and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The conductive polypropylene composite powder for selective laser sintering of this embodiment is made of the following raw materials in parts by weight: polypropylene powder 100, alkyl modified carbon nanotubes 3, copper powder 10, flow aid (talc powder 0.3, magnesium stearate 0.4), antioxidant 1010 0.3 and powder release agent (magnesium stearate 0.1, calcium carbonate 3.0). The polypropylene powder is spherical / quasi-spherical, the particle size range is 20~100μm, and the particle size distribution is D10=45μm, D50=80μm, D90=110μm. The melt index of polypropylene powder is 49 g / 10min measured at 190°C under a load of 2.16kg; the copper powder is spherical / spherical, with a particle size range of 10-120 μm and a particle size distribution of D10=32 μm, D50=95 μm, D90=125μm.

[0039] The preparation method of the conductive polypropylene composite powder for selective laser sintering of the present embodiment is characterized in that it comprises the following steps: ...

Embodiment 2~6

[0049] Table 2 shows the specific formulation of the conductive polypropylene composite powder for selective laser sintering prepared in Examples 2-6 and the test results of the mechanical properties and electrical conductivity of the sample formed by selective laser sintering. The preparation method of the conductive polypropylene composite powder for selective laser sintering in Examples 2-6 is the same as that in Example 1.

[0050] Table 2 Material formula (weight / part) and performance measurement results of Examples 2-6

[0051]

[0052]

[0053] It can be seen from Table 2 that the conductive polypropylene composite powder for selective laser sintering prepared within the scope of the components of the present invention has better mechanical properties and excellent electrical conductivity after selective laser sintering, which meets the electronic requirements. Or the requirements for polypropylene powder materials in the electrical field.

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Abstract

The invention discloses conductive polypropylene composite powder for selective laser sintering and a preparation method thereof.The conductive polypropylene composite powder is prepared from, by weight, 100 parts of polypropylene powder, 0.05-10 parts of alkyl modified carbon nano tubes, 0.05-20 parts of metal powder, 0.1-1.0 part of flow promoter, 0.1-1.0 part of antioxidant and 0.1-5 parts of powder separant.Due to addition of the alkyl modified carbon nano tubes and the metal powder, the conductive polypropylene composite powder for selective laser sintering has good conductivity.The invention further provides the preparation method of the conductive polypropylene composite powder for selective laser sintering.The process is simple, the conductive polypropylene composite powder with the powder size and distribution meeting SLS technological requirements and the alkyl modified carbon nano tubes and the metal powder scattered uniformly can be obtained, operation is easy, large-scale production and popularization can be realized, and broad market prospects and excellent market benefits are achieved.

Description

technical field [0001] The invention relates to a conductive polypropylene composite powder for selective laser sintering and a preparation method thereof, and relates to the fields of 3D printing technology and plastic processing. Background technique [0002] 3D printing technology, also known as rapid prototyping manufacturing technology, has the common characteristics of "layer-by-layer manufacturing and layer-by-layer superposition". As a powerful means of researching and developing new products, 3D printing technology has developed into an emerging industry in high-tech manufacturing technology. 3D printing technology involves many aspects such as information technology, material science, precision machinery, etc. It is becoming more and more competitive in today's manufacturing industry, so it is called "manufacturing technology with industrial revolution significance". [0003] Selective Laser Sintering (Selective Laser Sintering, referred to as SLS) is a kind of 3D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/04C08K7/24C08K3/08C08K5/098C08K3/26C08K3/22C08K3/30B33Y70/00
CPCC08K3/08C08K3/22C08K3/26C08K3/30C08K5/098C08K7/24C08K9/04C08K13/06C08K2003/0806C08K2003/0831C08K2003/085C08K2003/0856C08K2003/0862C08K2003/2227C08K2003/2244C08K2003/2296C08K2003/265C08K2003/3045C08K2201/001C08K2201/003C08K2201/004C08K2201/011C08L2201/08C08L23/12
Inventor 于翔王延伟徐茜丁宁
Owner HENAN INST OF ENG
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