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Additive manufacturing method for making a three-dimensional object using selective laser sintering

A technology of additive manufacturing and laser sintering, applied in the field of 3D objects, which can solve the problems of SLS machinability and recycling effects and limitations

Inactive Publication Date: 2020-05-01
SOLVAY SPECIALTY POLYMERS USA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some semi-crystalline polymers, such as poly(etheretherketone) (PEEK), processing temperatures are too high leading to degradation and / or crosslinking, which negatively affects SLS processability and recycling
Therefore, the potential of the SLS method is limited by the limited number of materials optimized for the method

Method used

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  • Additive manufacturing method for making a three-dimensional object using selective laser sintering
  • Additive manufacturing method for making a three-dimensional object using selective laser sintering
  • Additive manufacturing method for making a three-dimensional object using selective laser sintering

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example

[0184] The present disclosure will now be described in more detail with reference to the following examples, which are for purposes of illustration only and are not intended to limit the scope of the present disclosure.

[0185] starting material

[0186] PEEK#1 : Poly(ether ether ketone) (PEEK) with MFI (400° C. / 2.16 kg) of 36 g / 10 min prepared according to the following method:

[0187] In a 500 ml 4-neck equipped with stirrer, N2 inlet tube, Claisen adapter with thermocouple inserted into the reaction medium, and Dean-Stark trap with condenser and dry ice trap Into the reaction flask, 128 g of diphenylsulfone, 28.6 g of p-hydroquinone and 57.2 g of 4,4′-difluorobenzophenone were introduced.

[0188] The reaction mixture was slowly heated to 150 °C. At 150 °C, 28.43 g of dry Na 2 CO 3 and 0.18 g dry K 2 CO 3 The mixture was added to the reaction mixture within 30 minutes. At the end of the addition, the reaction mixture was heated to 320°C at 1°C / min.

[0189] Afte...

example E10

[0259] Instance E10: Monolayers of Blend 1 printed with the defined printing conditions exhibited well-defined coalescence without the possibility of disintegration. This printed monolayer exhibits the ability to print at temperatures between 180°C and 200°C (less than 260°C (Tg+40)). The powder surrounding this printed monolayer remains unsintered and does not agglomerate.

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Abstract

The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprisingat least one poly(ether ether ketone) (PEEK) polymer, and at least one poly(aryl ether sulfone) (PAES) polymer, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (DEG C): Tp<Tg + 40, wherein Tg (DEG C) is the glass transition temperature of the PAES polymer, as measured by differential scanning calorimetry (DSC) according to ASTM D3418.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application 62 / 559,933, filed September 18, 2017, and European Application 17207188.8, filed December 14, 2017, the entire contents of each of these applications being incorporated by reference for all purposes incorporated into this application. technical field [0003] The present disclosure relates to an additive manufacturing (AM) method for manufacturing three-dimensional (3D) objects using a powdered polymer material (M) comprising at least one poly(ether ether ketone) (PEEK) polymer, in particular to a A 3D object obtainable from this powdered polymer material (M) by laser sintering. Background technique [0004] Additive manufacturing systems are used to print or otherwise build 3D objects from digital blueprints created with computer-aided design (CAD) modeling software. Selective laser sintering ("SLS"), one of the additive manufacturing techniques availa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40C08G75/23C08L71/00B29C64/153
CPCC08G75/23C08L71/00B29C64/153C08G2650/40C08L81/06B33Y10/00B33Y80/00B29C64/264B29K2071/00B29K2081/06
Inventor S.乔尔C.沃德V.里奥
Owner SOLVAY SPECIALTY POLYMERS USA LLC