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Modified polyphenylene sulfide composite material used for selective laser sintering, and preparation method thereof

A technology of composite materials and polyphenylene sulfide, which is applied in the field of additive manufacturing, can solve the problems of performance differences of polyphenylene sulfide powder composite materials, uneven overall performance of sintered parts, and low mechanical strength of workpieces, so as to promote compatibility , Improve powder fluidity and excellent mechanical properties

Inactive Publication Date: 2018-06-15
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the mechanical strength of the workpiece obtained by pure polyphenylene sulfide powder used in selective laser sintering is not high, and the fiber-reinforced polyphenylene sulfide material can greatly improve its mechanical and thermal properties, but due to the fiber in Orientation occurs during selective laser sintering, which leads to differences in the performance of polyphenylene sulfide powder composites on the horizontal plane, making the mechanical properties along the long axis of the fiber much higher than those perpendicular to the long axis of the fiber. performance, so that the overall performance of the sintered parts is not uniform

Method used

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  • Modified polyphenylene sulfide composite material used for selective laser sintering, and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing a modified polyphenylene sulfide composite material for selective laser sintering, comprising:

[0037] Mix and stir the components included in the modified polyphenylene sulfide composite material for selective laser sintering described in any one of the above, and dry to obtain the modified polyphenylene sulfide for selective laser sintering Ether composites.

[0038] In a specific implementation, the rotational speed of the mixing and stirring is 500-2000 r / min, and the mixing and stirring time is 1-60 minutes; the temperature of the drying is below 100° C., and the drying time is 1-48 hours.

Embodiment 1

[0041] (1) Prepare raw materials according to the following components and their weight ratios:

[0042] Polyphenylene sulfide powder 55 parts

[0043] 30 parts glass fiber

[0044] 15 slices of glass

[0045] 0.1 parts of coupling agent

[0046] Powder flow aid 0.2 parts

[0047] The average particle size of the polyphenylene sulfide powder is 60 μm, the average diameter of the glass fibers is 5 μm, and the average length is 75 μm. The glass sheet is an irregular structure of different sizes, with an average thickness of 8 μm; the coupling agent is sodium dodecylbenzenesulfonate with good compatibility and a particle size of 1.8 μm; the powder flow aid The agent is fumed silica.

[0048] (2) Weigh the above raw materials according to the above weight ratio, add them into a high-speed mixer and mix and stir for 25 minutes to obtain a polyphenylene sulfide composite powder mixture; place the mixture powder in a 90°C drying oven for 10 Hours, the polyphenylene sulfide comp...

Embodiment 2

[0050] (1) Prepare raw materials according to the following components and their weight ratios:

[0051] Polyphenylene sulfide powder 65 parts

[0052] 25 parts glass fiber

[0053] 10 slices of glass

[0054]0.2 parts of coupling agent

[0055] Powder flow aid 0.3 parts

[0056] The average particle diameter of the polyphenylene sulfide powder is 75 μm, the average diameter of the glass fibers is 12 μm, and the average length is 97 μm. The glass flakes are irregular structures of different sizes, with an average thickness of 15 μm. The coupling agent is dodecyl ethoxy sulfobetaine with good compatibility and a particle size of 2.4 μm, and the powder flow aid is nano-alumina.

[0057] (2) Weigh the above raw materials according to the above weight ratio, add them into a high-speed mixer and mix and stir for 10 minutes to obtain a polyphenylene sulfide composite powder mixture; and place the mixture powder in an 80°C drying oven for 12 Hours, the polyphenylene sulfide com...

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Abstract

The invention discloses a modified polyphenylene sulfide composite material used for selective laser sintering, and a preparation method thereof. The modified polyphenylene sulfide composite materialused for selective laser sintering comprises, by weight, 50 to 95 parts of polyphenylene sulfide powder, 2 to 35 parts of glass fiber, 2 to 20 parts of glass flake, 0.1 to 1 part of a coupling agent,and 0.1 to 1 part of a powder flow promoter; the average thickness of the glass flake ranges from 1 to 100<mu>m, and the average particle size ranges from 20 to 300<mu>m. The modified polyphenylene sulfide composite material used for selective laser sintering and the preparation method are capable of solving a fiber composite material powder coating orientation technical problem; powder fluidity is excellent; sintering technology is stable; the anisotropic mechanical properties are excellent and more uniform.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a modified polyphenylene sulfide composite material for selective laser sintering and a preparation method thereof. Background technique [0002] 3D printing technology is a general term for additive manufacturing technology. It is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Establish a digital description model based on the combination information of structure, structure and selected materials, and then output this information to the computer-controlled electromechanical integrated manufacturing system for point-by-point, line-by-line, and surface-by-surface three-dimensional stacking to produce three-dimensional entities. Compared with the traditional subtractive manufacturing processing technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K13/04C08K7/14C08K3/40C08K5/42C08K3/36C08K3/22C08J5/04
CPCC08K13/04C08J5/043C08J2381/02C08K3/22C08K3/36C08K3/40C08K5/42C08K7/14C08K2003/2206C08K2003/2227C08K2003/2241C08K2201/003C08K2201/004C08K2201/011C08L81/02
Inventor 杨云龙袁博冯晓宏冯娟
Owner HUNAN FARSOON HIGH TECH CO LTD