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Preparation method of high-molecular polymer powder material applied to 3D printing

A technology of high molecular polymer and powder material, which is applied in the field of preparation of high molecular polymer powder material for 3D printing, can solve the problems of high equipment requirements and complicated preparation process of film-coated powder, and achieves good fluidity and dispersion. Effect

Inactive Publication Date: 2014-12-10
丹阳惠达模具材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation process of coating powder is relatively complicated, and the requirements for equipment are very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Put 100 grams of polyether ether ketone (PEEK) polymer powder, 3 grams of nylon 12 resin, 1000 grams of ethanol solvent and 0.2 grams of composite antioxidant into a jacketed 10L stainless steel reaction kettle, and the reaction kettle Sealed, vacuumed, through N 2 Gas protection;

[0031] (2) Gradually raise the temperature to 142°C at a rate of 1°C / min, so that the nylon 12 resin is completely dissolved in the solvent, and keep the heat and pressure for 1 hour;

[0032] (3) Under vigorous stirring, gradually cool down to room temperature at a rate of 2°C / min, so that nylon 12 uses polyetheretherketone powder particles as the core, and gradually crystallizes and coats the surface of polyetheretherketone particles to form nylon 12 coated poly Ether ether ketone polymer powder suspension.

[0033] (4) In the reaction kettle, the cooled suspension is subjected to solid-liquid separation by vacuum distillation, and the obtained ethanol solvent can be recycled repeate...

Embodiment 2

[0036] (1) Put 200 grams of polyimide (PI) polymer powder, 8 grams of nylon 12 resin, 2500 grams of ethanol solvent and 0.5 grams of composite antioxidant into a jacketed 10L stainless steel reactor, and the reactor Sealed, vacuumed, through N 2 Gas protection;

[0037] (2) Gradually raise the temperature to 145°C at a rate of 2°C / min, so that the nylon 12 resin is completely dissolved in the solvent, and hold the heat for 1 hour;

[0038](3) Under vigorous stirring, gradually cool down to room temperature at a rate of 2°C / min, so that nylon 12 uses polyimide powder particles as the nucleus, and gradually crystallizes and coats the surface of polyimide particles to form nylon 12 coated polyimide. Imide polymer powder suspension.

[0039] (4) In the reaction kettle, the cooled suspension is subjected to solid-liquid separation by vacuum distillation, and the obtained ethanol solvent can be recycled repeatedly.

[0040] (5) After the obtained powder aggregates are vacuum-drie...

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Abstract

The invention discloses a preparation method of a nylon-coated high-molecular polymer powder material. The preparation method of the nylon-coated high-molecular polymer powder material comprises the following steps: firstly heating a mixture of nylon resin, an ethyl alcohol solvent, high-molecular polymer powder and an antioxidant in a sealed container, dissolving nylon in the solvent, then gradually cooling, gradually crystallizing the nylon resin by taking high-molecular polymer particles as the core, coating the surfaces of the high-molecular polymer particles with the nylon resin, carrying out vacuum drying and ball milling, and screening, so that powder with certain particle diameter distribution is selected as the nylon-coated high-molecular polymer powder material. The high-molecular polymer powder / nylon resin composite material prepared by the method is excellent in sintering furnace and high in fluidity; the material has a small amount of nylon; a selective laser sintering (SLS) initial shape blank has relatively high accuracy and strength, so that the material is very suitable for indirectly manufacturing high-molecular function parts by virtue of SLS.

Description

technical field [0001] The invention belongs to the field of material preparation in advanced rapid manufacturing, and in particular relates to a method for preparing a polymer powder material for 3D printing. The polymer powder material modified on the surface of nylon coating is especially suitable for the rapid manufacture of polymer parts by selective laser sintering (Slective Laser Sinter, SLS). technical background [0002] As an important structural material, some polymer materials (polyether ether ketone, polyimide, etc.) have the advantages of high strength, high hardness, wear resistance, and corrosion resistance. It has a wide range of applications in many fields. However, for polymer parts with complex shapes, complex molds are required to shape them. However, complex molds require high manufacturing costs and a long manufacturing cycle. At the same time, once the mold is manufactured, the size, shape and other parameters of the polymer product cannot be modifi...

Claims

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Application Information

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IPC IPC(8): B29C67/00
Inventor 魏青松王爱华李正阳丁刚张海龙
Owner 丹阳惠达模具材料科技有限公司
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