Method for manufacturing a particulate semi-crystalline polyamide for 3D printing
A treatment process for semi-crystalline polyamide using water and acid heating enhances melting temperature and enthalpy, addressing energy inefficiencies and property degradation in 3D printing, ensuring efficient and cost-effective reuse of polyamide powder.
FR3169749A1Pending Publication Date: 2026-06-19ARKEMA FRANCE SA
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- ARKEMA FRANCE SA
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-19
Abstract
The invention relates to a process for treating a particulate semi-crystalline polyamide comprising a step of contacting an initial polyamide with water and at least one acid to obtain a mixture; at least one step of heating the mixture to a temperature between Tc - 20°C and Tc + 20°C, Tc representing the crystallization temperature of the initial polyamide; at least one step of separating the mixture by a solid-liquid separation means, to obtain a solid fraction with a moisture content of less than 25% by weight, and a step of drying the solid fraction, leading to the recovery of dried treated particulate semi-crystalline polyamide.
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Citation Information
Patent Citations
Process for increasing the melting point and the melting enthalpy of polyamides by water treatment
EP1413595A1
Method for increasing the recyclability of a polyamide used in sintering
EP2530121A1
Process for producing a polyamide powder by precipitation
US20200010627A1