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Selective laser sintering polyimide powder material and preparation and application methods thereof

A polyimide powder and laser sintering technology, which is applied in the direction of additive processing, etc., can solve problems such as high melt viscosity, no crystallinity, no fixed melting temperature and sintering window

Active Publication Date: 2019-05-14
宁波领科新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application documents with publication numbers CN 106380847A, CN 106432757A and CN 106433126A all use polyimide materials in selective laser sintering molding, but these polyimide materials are all amorphous and do not have crystallinity
[0005] In summary, in the prior art, amorphous polyimide materials are mostly used in selective laser sintering molding, without fixed melting temperature and sintering window, high melt viscosity, and poor overall performance of sintered parts

Method used

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  • Selective laser sintering polyimide powder material and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A polyimide powder material for selective laser sintering, which consists of (by weight):

[0042] ① 100 parts of crystalline polyimide resin powder (synthesized from the following aromatic dianhydride monomers, aromatic diamine monomers, and end-capping agents, and the aromatic dianhydride monomers are 3,3',4,4'- 55 parts of triphenyl ether tetra-acid dianhydride, 32 parts of 1,4-bis(4'-aminophenoxy)benzene and 12 parts of 3,4'-diaminodiphenyl ether as aromatic diamine, end-capping agent It is 1 part of terephthalic anhydride, and the number average molecular weight of the resin is 25000g / mol)

[0043] ②0.3 parts of polyphenylene sulfide resin powder [coating grade, melt index (316℃ / 5kg) is 1700g / 10min, particle size is 10μm-150μm spherical powder solid]

[0044] ③0.5 part of antioxidant (0.3 part of antioxidant 1010 and 0.2 part of antioxidant 168)

[0045] The preparation method of the polyimide powder material for selective laser sintering:

[0046] (1) Cool the ...

Embodiment 2

[0052] A polyimide powder material for selective laser sintering, which consists of (by weight):

[0053] ① 90 parts of crystalline polyimide resin powder (synthesized from the following aromatic dianhydride monomers and aromatic diamine monomers, the aromatic dianhydride monomer is 3,3',4,4'-triphenylene ether 56 parts of tetra-acid dianhydride, 32 parts of 1,3-bis(4'-aminophenoxy)benzene and 10 parts of 3,4'-diaminodiphenyl ether as the aromatic diamine monomer, and homogeneous 2 parts of phthalic anhydride, resin number average molecular weight 25000g / mol)

[0054] ② 2 parts polyphenylene sulfide resin powder [coating grade, melt index (316℃ / 5kg) is 1700g / 10min, particle size is 10μm-150μm spherical powder solid]

[0055] ③ 10 parts of nano silicon dioxide

[0056] ④ Antioxidant 0.5 part (antioxidant 1010 0.4 part and antioxidant 168 0.1 part)

[0057] The preparation method of the polyimide powder material for selective laser sintering:

[0058] (1) Cool the polyimide ...

Embodiment 3

[0064] A polyimide powder material for selective laser sintering, which consists of (by weight):

[0065] ① 90 parts of crystalline polyimide resin powder (synthesized from the following aromatic dianhydride monomers and aromatic diamine monomers, the aromatic dianhydride monomer is 3,3',4,4'-triphenylene ether A mixture of 8.5 parts of tetracarboxylic dianhydride and 35.5 parts of 3,3',4,4'-biphenyl tetracarboxylic dianhydride, the aromatic diamine monomer is 1,3-bis(4'-aminophenoxy)benzene 44.5 parts, the end-capping agent is 1.5 parts of terephthalic anhydride, and the number average molecular weight of the resin is 20000g / mol)

[0066] ② 2 parts polyphenylene sulfide resin powder [coating grade, melt index (316℃ / 5kg) is 1700g / 10min, particle size is 10μm-150μm spherical powder solid]

[0067] ③Carbon nanotubes 10 parts

[0068] ④ 0.5 parts of antioxidant (0.2 parts of antioxidant 1010 and 0.3 parts of antioxidant 168)

[0069] The preparation method of the polyimide pow...

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Abstract

The invention relates to a laser sintering rapidly shaping powder material and preparation and application methods thereof, belongs to the field of rapidly shaping high-polymer materials and particularly relates to a selective laser sintering polyimide powder material and a preparation method thereof. The selective laser sintering polyimide powder material is composed of raw materials including, by weight part, 70-100 parts of crystalline polyimide resin, 0-30 parts of nanometer inorganic filler, 0.1-5 parts of polyphenylene sulfide resin and 0.1-3 parts of antioxidant. The selective laser sintering polyimide powder material can facilitate layering during a printing process; 3D (three-dimensional) products printed by the selective laser sintering polyimide powder material can be continuously applied at 330-380 DEG C.

Description

technical field [0001] The invention relates to a laser sintering rapid prototyping powder material and its preparation method and application, belonging to the field of rapid prototyping polymer materials, in particular to a polyimide powder material for selective laser sintering and its preparation method. Background technique [0002] Selective laser sintering (SLS) technology appeared in the late 1980s. It is a 3D printing technology based on additive manufacturing. It can directly manufacture three-dimensional complex structures and is known as the key technology of the "third industrial revolution". Sintered material is an important factor restricting the development of SLS technology. At present, among many types of laser sintering materials, polymer materials have overcome the "spheroidization" effect of metal powder sintering due to their low forming temperature, low surface energy, high melt viscosity, and low laser power required for sintering. And other characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L81/02C08K3/36C08K3/04C08K3/22B33Y70/00
Inventor 王玮钟国伦
Owner 宁波领科新材料科技有限公司
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