A kind of polyphenylene sulfide powder material for selective laser sintering and its preparation method

A polyphenylene sulfide and laser sintering technology, which is applied in the field of polymer materials, can solve the problems of poor heat resistance of powder, warping of parts, yellowing of molded products, etc., and achieve good mechanical properties and improved dimensional stability Effect

Active Publication Date: 2018-05-25
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of the currently used polyamide powders is also that they often lead to unsatisfactory mechanical properties
In addition, if the molded product is exposed to strong radiation containing UV light or to direct sunlight for a long time, the molded product may yellow during subsequent use of the finished component
The nylon powder prepared by the existing method still has many defects when it is used for SLS molding and manufacturing, such as powder particle shape and particle size distribution are not uniform enough, the heat resistance of the powder is poor, and the sintering window of the powder material is narrow. And equipment requirements are strict, improper control of sintering temperature will lead to difficult control of powder melting during sintering process or parts warping and deformation due to internal stress, thus affecting the quality of SLS parts

Method used

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  • A kind of polyphenylene sulfide powder material for selective laser sintering and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A polyphenylene sulfide powder material for laser sintering rapid prototyping products, which is prepared according to the following method:

[0032] (1) Cool 1000 parts of polyphenylene sulfide powder in refrigeration equipment to -60°C, pulverize with a rod-pin structure type pulverizer at a disc speed of 250m / s to obtain polyphenylene sulfide powder;

[0033] (2) Put the above-mentioned polyphenylene sulfide powder into a high-speed mixer, add 15 parts of sodium dodecylbenzene sulfonate, stir the mixer at 900m / s and then dry at 120°C to prepare the base material;

[0034] (3) Add 100 parts of polyethylene grafted maleic anhydride and 200 parts of aluminum particles to the base material after surface treatment, and mix them uniformly in a high-speed mixer at a speed of 1100m / s; put the above-mentioned modified powder in the machine The vibrating screen is sieved at a vibration speed of 1400 RPM to obtain a polyphenylene sulfide powder material with a particle size of 60 μm f...

Embodiment 2

[0036] A polyphenylene sulfide powder material for laser sintering rapid prototyping products, which is prepared according to the following method:

[0037] (1) Cool 1000 parts of polyphenylene sulfide powder in a refrigeration equipment to -80°C, pulverize with a rod-pin structure type pulverizer at a disc speed of 230m / s to obtain polyphenylene sulfide powder;

[0038] (2) Put the above-mentioned polyphenylene sulfide powder into a high-speed mixer, add 5 parts of dodecyl ethoxy sulfobetaine, mix the mixer at 800 m / s, and then dry at 80 ℃ to prepare the base material ;

[0039] (3) Add 60 parts of ethylene-ethyl acetate copolymer and 150 parts of solid glass beads to the base material after surface treatment, and mix them evenly in a high-speed mixer at a speed of 1000m / s;

[0040] (4) The modified powder is sieved in a mechanical vibrating sieve at a vibration speed of 2000 RPM to obtain a polyphenylene sulfide powder material with a particle size of 140 μm for selective laser sint...

Embodiment 3

[0042] A polyphenylene sulfide powder material for laser sintering rapid prototyping products, which is prepared according to the following method:

[0043] (1) Cool 1000 parts of polyphenylene sulfide powder in a refrigeration equipment to -70°C, and pulverize with a rod-pin structure type pulverizer at a disc speed of 200m / s to obtain polyphenylene sulfide powder;

[0044] (2) Put the above-mentioned polyphenylene sulfide powder into a high-speed mixer, add 10 parts of sodium dodecylbenzene sulfonate, stir evenly in the mixer at 1100m / s and then dry at 100°C to prepare the base material;

[0045] (3) Add 10 parts of polypropylene grafted maleic anhydride and 80 parts of calcium carbonate to the base material after surface treatment, and mix them evenly in a high-speed mixer at 1300m / s;

[0046] (4) The modified powder is sieved in a mechanical vibrating screen at a vibration speed of 1000 RPM to obtain a polyphenylene sulfide powder material with a particle size of 120 μm for selecti...

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Abstract

The invention belongs to the field of polymer materials, and relates to a polyphenylene sulfide powder material for selective laser sintering and a preparation method thereof. The polyphenylene sulfide powder material is made of the following components by weight: 1000 parts of polyphenylene sulfide, 5-15 parts of surfactant, 10-100 parts of compatibilizer, and 30-200 parts of filler. The polyphenylene sulfide powder material prepared by the invention has good laser sintering performance, and the molded product has a very smooth surface. The very good dimensional stability of the device greatly improves the reliability of processing, and the moldings made of sintered powder have good mechanical properties, especially in flexural modulus, tensile strength and impact strength.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and relates to a polyphenylene sulfide powder material and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) is one of the most widely used rapid prototyping technologies at present. It uses solid powder as raw material and uses the principle of layering-superimposition to directly produce three-dimensional entities from CAD models. In theory, any Powders with reduced viscosity when heated can be used as SLS sintered materials, and a wide range of materials is one of the important factors that the SLS process can be widely used in various fields. Using this method to repeatedly irradiate newly applied layers in a constant order can realize simple and rapid manufacturing of three-dimensional products. [0003] The product does not need to undergo injection molding to obtain molded parts with high strength and good toughness. It can be directly used to test the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08K7/20C08K7/28C08K3/08C08K3/26
Inventor 杨桂生赵陈嘉
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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