Method for manufacturing a particulate semi-crystalline polyamide for 3D printing
A two-stage heating process enhances the melting temperature and enthalpy of semi-crystalline polyamide powders, addressing energy inefficiencies and maintaining mechanical properties for efficient reuse in 3D printing.
FR3169748A1Pending Publication Date: 2026-06-19ARKEMA FRANCE SA
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Patent Information
- Application Number
- FR2024014502
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- 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 particulate semi-crystalline polyamide with water and at least one acid to obtain a mixture; a first step of heating the mixture to a first temperature T1 greater than or equal to Tc-20°C, Tc representing the crystallization temperature of the initial polyamide, then a second step of heating the mixture to a second temperature T2 greater than the first temperature T1, T2 being less than Tf, Tf being the melting temperature of the particulate semi-crystalline polyamide at the end of the first heating step, and a step of collecting the 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