Polyurethane composite material for 3D printing, and preparation method and application thereof

A composite material, 3D printing technology, applied in the direction of additive processing, can solve the problems of limited polymer materials, unused industrial production, poor flexibility, etc., to achieve good flexibility, enhance mechanical properties, and broaden the scope of application.

Inactive Publication Date: 2015-09-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the biggest problem with the selective laser sintering process is the limited polymer material available for sintering
In theory, all polymer powders can be used in the selective laser sintering process, but there are very few polymer materials that can be used for laser sintering on the market. Currently, nylon-12 is the most widely used, accounting for more than 95%, while Other polymer materials that can be used for laser sintering, such as nylon-11, polycarbonate, polystyrene, polyetheretherketone, etc., have less applications
At...

Method used

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  • Polyurethane composite material for 3D printing, and preparation method and application thereof
  • Polyurethane composite material for 3D printing, and preparation method and application thereof
  • Polyurethane composite material for 3D printing, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Melt and mix 100 parts of polyurethane, 0.1 part of carbon nanotubes, 0.1 part of 2,4-dihydroxybenzophenone, and 0.1 part of 2,6-tertiary butyl-4-methylphenol into mechanical grinding equipment including ball mills , grinding disc structure pulverizer, etc., after pulverization, polyurethane composite material powder with an average particle size of 10 μm is obtained.

Embodiment 2

[0034] 100 parts of polyurethane, 2 parts of silicon dioxide, 0.2 parts of 2,4-dihydroxybenzophenone, 0.2 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol The esters were melted and mixed and then added to a freeze pulverizer to obtain a polyurethane composite material powder with an average particle size of 40 μm after freeze pulverization.

Embodiment 3

[0036] Prepare 100 parts of polyurethane into polyurethane emulsion, 3 parts of aluminum oxide, 0.3 part of 5-chlorinated benzotriazole, 0.3 part of N,N'-bis-(3-(3,5-di-tert-butyl- Add 4-hydroxyphenyl)propionyl)hexamethylenediamine powder into the emulsion, add the emulsion into the spray drying equipment, spray the solution under high pressure, contact with hot air, remove the solvent to obtain polyurethane with an average particle size of 70μm Composite powder.

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Abstract

The invention discloses a polyurethane composite material for 3D printing, and a preparation method and application thereof. The invention is characterized in that the polyurethane composite material is prepared from the following initial raw materials in parts by weight: 100 parts of polyurethane, 0.1-10 parts of inorganic filler, 0.1-0.5 part of light stabilizer and 0.1-0.5 part of antioxidant. The preparation method comprises the following steps: evenly mixing 100 parts of polyurethane, 0.1-10 parts of inorganic filler, 0.1-0.5 part of light stabilizer and 0.1-0.5 part of antioxidant, and preparing power to obtain the composite material, wherein the average particle size of the composite material powder is 10-100 mu m. The product can be prepared by a 3D printing technique, such as selective laser sintering. The polyurethane has favorable flexibility; and the introduced inorganic filler improves the 3D printing performance of the polyurethane, so that the product has excellent mechanical properties. The tensile strength of the product prepared from the material by laser sintering can reach 20.12 MPa, and the elongation at break can reach 511.12%.

Description

technical field [0001] The invention relates to a polyurethane composite material for 3D printing and its preparation method and application, belonging to the field of polymer material processing. Background technique [0002] 3D printing technology, that is, rapid prototyping (RP) technology, it is based on the computer three-dimensional design model, using metal powder, ceramic powder, polymer powder materials to obtain products through layer-by-layer printing and superposition molding. 3D printing technologies include Stereo Lithography Apparatus, Laminated Object Manufacturing, Selective Laser Sintering and Fused Deposition Manufacturing. [0003] Selective laser sintering is the most widely used 3D printing technology. The idea of ​​selective laser sintering was proposed by C.R.Dechard of the University of Texas at Austin in 1986, and the selective laser sintering process was successfully developed in 1989. This process is the fastest-growing, most successful and comm...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K13/04C08K7/24C08K5/13C08K5/07C08K3/36C08K5/134C08K3/34C08K3/04C08K3/08B33Y70/00
Inventor 夏和生李志超费国霞
Owner SICHUAN UNIV
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