Polyamide powders for 3D printing

A dual-polyamide powder composition with distinct chemical natures broadens the working window and improves mechanical properties by reducing curling and enhancing layer adhesion in additive manufacturing.

WO2026027835A1PCT designated stage Publication Date: 2026-02-05ARKEMA FRANCE SA
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Patent Information

Application Number
PCT/FR2025/050719
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-01
Filing Date
2025-07-30
Publication Date
2026-02-05

AI Technical Summary

Technical Problem

Long-chain polyamide powders used in additive manufacturing exhibit narrow working windows, leading to issues like curling and poor layer adhesion, which complicates the printing process and affects mechanical properties of the printed parts.

Method used

A composition of polyamide powders with distinct chemical natures, specifically polyamide A1 and polyamide A2, is formulated to broaden the working window by reducing sintering temperatures and improving layer adhesion, using a specific ratio and percentage of each powder.

Benefits of technology

The composition enhances the processability of polyamide powders, reduces curling, and improves the mechanical properties of printed parts, particularly along the Z-axis, by expanding the working window towards lower temperatures.

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Abstract

The present invention relates to a long-chain polyamide powder composition for manufacturing items by 3D printing, in particular by sintering, making it possible to improve the processability of the material during printing. The invention also relates to a method for preparing this powder composition, to the use thereof in a sintering-based manufacturing process, and to the items manufactured from said powder composition.
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Citation Information

Patent Citations

  • Preparation of precipitated polyamide powders with a narrow grain size distribution and low porosity

    EP0863174B1

  • Process for increasing the melting point and the melting enthalpy of polyamides by water treatment

    EP1413595A1

  • Process for obtaining polyamide or copolyesteramide particles

    EP1814931B1

  • Moisture detecting system and method for use in an IGBT or a mosfet

    EP3542430A1

  • metal spoke wheel

    FR656024A