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FR3128959A1 - Polymer powder for the manufacture of high definition and low roughness parts - Google Patents

Polymer powder for the manufacture of high definition and low roughness parts Download PDF

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Publication number
FR3128959A1
FR3128959A1 FR2111866A FR2111866A FR3128959A1 FR 3128959 A1 FR3128959 A1 FR 3128959A1 FR 2111866 A FR2111866 A FR 2111866A FR 2111866 A FR2111866 A FR 2111866A FR 3128959 A1 FR3128959 A1 FR 3128959A1
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Prior art keywords
powder
composition according
polymer powder
ratio
additive manufacturing
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French (fr)
Inventor
Geoffroy CAMMAGE
Hervé STER
Arnaud LEMAITRE
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Arkema France SA
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Arkema France SA
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Priority to FR2111866A priority Critical patent/FR3128959A1/en
Priority to JP2024527170A priority patent/JP2024540414A/en
Priority to EP22814354.1A priority patent/EP4430108A1/en
Priority to PCT/EP2022/081129 priority patent/WO2023083809A1/en
Publication of FR3128959A1 publication Critical patent/FR3128959A1/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14—Lactams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L’invention vise principalement une composition de poudre de polymère thermoplastique adaptée pour la fabrication additive par fusion sélective, dans laquelle la poudre de polymère présente  une granulométrie caractérisée par :un diamètre moyen en volume Dv < 55 µm, etun span inférieur à 1,20, et telle qu’un ratio d est compris entre 0,40 et 0,55, le ratio d étant de formule suivante : dans laquelle dp est la densité apparente de la poudre mesurée selon la norme ISO 787-11:1981 ; et dm est la densité du matériau mesurée sur la poudre après fusion selon la norme ISO 1183-1. The invention primarily relates to a thermoplastic polymer powder composition suitable for additive manufacturing by selective melting, in which the polymer powder has a particle size distribution characterized by: a volume average diameter Dv < 55 µm, and a span less than 1.20, and such that a ratio d is between 0.40 and 0.55, the ratio d being of the following formula: in which dp is the apparent density of the powder measured according to ISO 787-11:1981; and dm is the density of the material measured on the powder after melting according to ISO 1183-1.

Description

Poudre polymère pour la fabrication de pièces de haute définition et de faible rugositéPolymer powder for the manufacture of high definition and low roughness parts

La présente demande de brevet concerne une poudre de polymère thermoplastique pour la fabrication additive de pièces de haute définition et de faible rugosité.This patent application relates to a thermoplastic polymer powder for the additive manufacturing of high definition and low roughness parts.

L’impression 3D par fusion sélective de poudres de polymères thermoplastiques (SLS, MJF, HSS…) permet de construire des pièces de géométrie complexe. Néanmoins, la définition des pièces ainsi imprimées ainsi que leur rugosité de surface ne sont pas encore complètement satisfaisantes.3D printing by selective melting of thermoplastic polymer powders (SLS, MJF, HSS, etc.) makes it possible to build parts with complex geometry. Nevertheless, the definition of the parts thus printed as well as their surface roughness are not yet completely satisfactory.

Il est connu d’améliorer l’état de surface de pièces construites par fusion sélective par un traitement physique et/ou chimique. Cependant, ces traitements augmentent de manière substantielle le temps de production et donc le coût de fabrication des pièces.It is known to improve the surface condition of parts built by selective melting by a physical and/or chemical treatment. However, these treatments substantially increase the production time and therefore the manufacturing cost of the parts.

Certains procédés ont également été décrits dans lesquels on traite la poudre de polymère à utiliser dans l’impression 3D. Ainsi, le brevet européen EP1742986 B1 enseigne qu’une poudre de polyamide présentant une enthalpie de fusion et une température de fusion éloignée de la température de cristallisation permet d’améliorer la définition des pièces construites par fusion sélective.Some processes have also been described in which the polymer powder to be used in 3D printing is processed. Thus, European patent EP1742986 B1 teaches that a polyamide powder having a melting enthalpy and a melting temperature far from the crystallization temperature makes it possible to improve the definition of parts built by selective melting.

Le brevet EP 1 413 595 B1 décrit un procédé pour augmenter au moins l'un des deux paramètres suivants d'un polyamide : (i) sa température de fusion et (ii) son enthalpie de fusion ∆Hf dans lequel on met en contact ce polyamide à l'état solide avec de l'eau ou de la vapeur d'eau à une température proche de sa température de cristallisation Tc pendant une durée suffisante pour effectuer cette augmentation, puis on sépare l'eau (ou la vapeur d'eau) du polyamide et on sèche le polyamide.Patent EP 1 413 595 B1 describes a process for increasing at least one of the following two parameters of a polyamide: (i) its melting temperature and (ii) its enthalpy of fusion ∆Hf in which this polyamide in the solid state with water or water vapor at a temperature close to its crystallization temperature Tc for a time sufficient to effect this increase, then the water (or water vapor) is separated ) of the polyamide and the polyamide is dried.

Par ailleurs, les brevets EP 2 115 043 B1 et EP 2 627 687 B1 enseignent que le traitement thermique de poudres de PAEK permet d’améliorer la définition des pièces construites.Furthermore, patents EP 2 115 043 B1 and EP 2 627 687 B1 teach that the heat treatment of PAEK powders makes it possible to improve the definition of constructed parts.

Néanmoins, ces méthodes sont spécifiques à certains polymères et n’apportent par ailleurs pas toujours une entière satisfaction.However, these methods are specific to certain polymers and do not always provide complete satisfaction.

L’invention a donc pour but de proposer une poudre de polymère permettant d’améliorer la définition et l’aspect de surface des pièces produites par fusion sélective.The object of the invention is therefore to propose a polymer powder making it possible to improve the definition and the surface appearance of parts produced by selective melting.

En effet, la présente invention repose sur la constatation qu’une poudre de morphologie adaptée et présentant une granulométrie appropriée permet d’améliorer la définition des pièces et réduit la rugosité de surface des articles produits par des méthodes d’impression 3D par fusion sélective.Indeed, the present invention is based on the observation that a powder of suitable morphology and having an appropriate particle size makes it possible to improve the definition of the parts and reduces the surface roughness of the articles produced by 3D printing methods by selective melting.

Plus spécifiquement, il a été constaté qu’une poudre à distribution granulométrique resserrée avec peu de particules fines permet d’optimiser la fusion des grains visés, en ce qu’elle réduit le risque de fusion de grains voisins, et améliore dès lors la définition des pièces construites. Par ailleurs, la faible concentration en grosses particules limite la texturation de la surface et de ce fait la perte de définition et la rugosité de la surface qui pourraient en découler.More specifically, it has been observed that a powder with a narrow particle size distribution with few fine particles makes it possible to optimize the fusion of the targeted grains, in that it reduces the risk of fusion of neighboring grains, and therefore improves the definition built parts. Moreover, the low concentration of large particles limits the texturing of the surface and therefore the loss of definition and the roughness of the surface which could result therefrom.

Enfin, il a été constaté que l’utilisation d’une poudre dont la densité apparente est telle que le rapport avec celle du matériau vaut entre 0.40 à 0.55 permet d’optimiser la définition des pièces. La densité apparente de la poudre varie notamment en fonction de la morphologie de la poudre mais aussi selon sa cristallinité. Une telle poudre permet par ailleurs d’éviter les défauts de construction sur les pièces notamment rondes ou penchées tout en conservant une bonne productivité.Finally, it was found that the use of a powder whose apparent density is such that the ratio with that of the material is between 0.40 and 0.55 makes it possible to optimize the definition of the parts. The apparent density of the powder varies in particular according to the morphology of the powder but also according to its crystallinity. Such a powder also makes it possible to avoid construction defects on parts, in particular round or bent, while maintaining good productivity.

Aussi, selon un premier aspect, l’invention a pour objet une composition de poudre de polymère thermoplastique adaptée pour la fabrication additive par fusion sélective, dans laquelle la poudre de polymère présenteAlso, according to a first aspect, the subject of the invention is a composition of thermoplastic polymer powder suitable for additive manufacturing by selective melting, in which the polymer powder has

  • une granulométrie caractérisée par :
    • un diamètre moyen en volume Dv < 55 µm, et
    • un span inférieur à 1.2, et
    a particle size characterized by:
    • an average volume diameter Dv < 55 µm, and
    • a span less than 1.2, and
  • telle qu’un ratio d est compris entre 0.40 et 0.55, le ratio d étant de formule suivante :such that a ratio d is between 0.40 and 0.55, the ratio d being of the following formula:

dans laquellein which

dpest la densité apparente de la poudre mesurée selon la norme ISO 787-11:1981 ; etd p is the apparent density of the powder measured according to standard ISO 787-11:1981; And

dmest la densité du matériau mesurée sur la poudre après fusion selon la norme ISO 1183-1.d m is the density of the material measured on the powder after fusion according to the ISO 1183-1 standard.

Selon un mode de réalisation, le polymère thermoplastique comprend ou est constitué d’un polymère thermoplastique choisi dans le groupe consistant en les polyesters, le chlorure de polyvinyle, le polyacétal, les polyoléfines comme le polypropylène et le polyéthylène, le polystyrène, le polycarbonate, le poly-(N-méthylméthactlumide, PMMI), le polyméthylméthacrylate (PMMA), les ionomères, les polyamides, les élastomères thermoplastiques tels que les polyétherblock amides, les PAEK, et leurs mélanges, et en particulier il comprend ou est constitué de PA 11, PA 12, polyamide semi-aromatique tel que le PA 11/10T, un PEBA ou un PAEK tel que le PEKK, le PEEK, le PEEK-PEDEK et le PEEK-PEmEK.According to one embodiment, the thermoplastic polymer comprises or consists of a thermoplastic polymer chosen from the group consisting of polyesters, polyvinyl chloride, polyacetal, polyolefins such as polypropylene and polyethylene, polystyrene, polycarbonate, poly-(N-methylmethactlumide, PMMI), polymethylmethacrylate (PMMA), ionomers, polyamides, thermoplastic elastomers such as polyetherblock amides, PAEKs, and mixtures thereof, and in particular it comprises or consists of PA 11 , PA 12, semi-aromatic polyamide such as PA 11/10T, a PEBA or a PAEK such as PEKK, PEEK, PEEK-PEDEK and PEEK-PEmEK.

Selon un mode de réalisation, la composition comprend en outre un agent d’écoulement.According to one embodiment, the composition further comprises a flow agent.

Avantageusement, la poudre de polymère présente un span inférieur à 1.00, et de préférence inférieur à 0.90.Advantageously, the polymer powder has a span of less than 1.00, and preferably less than 0.90.

De préférence, la poudre de polymère présente un ratio d compris entre 0.45 et 0.55, et notamment compris entre 0.47 et 0.51.Preferably, the polymer powder has a ratio d of between 0.45 and 0.55, and in particular of between 0.47 and 0.51.

Avantageusement, la poudre de polymère présente par ailleurs une viscosité inhérente de 0.65 à 1.50, préférentiellement de 0.85 à 1.40, et de manière davantage préférée de 1.00 à 1.30.Advantageously, the polymer powder also has an inherent viscosity of 0.65 to 1.50, preferentially of 0.85 to 1.40, and more preferably of 1.00 to 1.30.

Selon un deuxième aspect, l’invention vise un procédé de fabrication de la composition de la poudre décrite, comprenant les étapes de :According to a second aspect, the invention relates to a process for manufacturing the composition of the powder described, comprising the steps of:

  1. Prépolymérisation du ou des monomères du polymère thermoplastique et granulation subséquente ;Prepolymerization of the thermoplastic polymer monomer(s) and subsequent granulation;
  2. Broyage en une poudre ;Grinding into a powder;
  3. Tamisage subséquent éventuel de la poudre de prépolymère obtenue ; etPossible subsequent sieving of the prepolymer powder obtained; And
  4. Soumission de la poudre de prépolymère obtenue à une polycondensation en phase solide pour obtenir une poudre de polymère.Subjecting the obtained prepolymer powder to solid phase polycondensation to obtain a polymer powder.

Selon un troisième aspect, l’invention vise l’utilisation de la composition décrite ou obtenue selon le procédé ci-dessus pour la fabrication d’articles par fabrication additive au moyen de fusion sélective, notamment choisie parmi le SLS, MJF et le HSS.According to a third aspect, the invention relates to the use of the composition described or obtained according to the above process for the manufacture of articles by additive manufacturing by means of selective melting, in particular chosen from SLS, MJF and HSS.

Selon un quatrième aspect enfin, l’invention vise un article susceptible d’être obtenu par fabrication additive au moyen de fusion sélective de la composition décrite ou obtenue selon le procédé décrit.Finally, according to a fourth aspect, the invention relates to an article capable of being obtained by additive manufacturing by means of selective melting of the composition described or obtained according to the method described.

L’invention sera mieux comprise au regard de la description qui suit et des figures, lesquelles montrent :The invention will be better understood with regard to the following description and the figures, which show:

un dispositif d’impression 3D par frittage de type SLS (acronyme anglais pour « selective laser sintering », frittage sélectif par laser) ; a 3D printing device by sintering of the SLS type (English acronym for “selective laser sintering”, selective laser sintering);

l’évolution de l’épaisseur e de la poudre déposée après fusion par irradiation en fonction du nombre de couches n de 100 µm chacune dans une construction par frittage laser, calculée pour des poudres présentant un ratio d de 0.3 (●), de 0.5 (■) et de 0.7 (♦). the evolution of the thickness e of the powder deposited after melting by irradiation as a function of the number of layers n of 100 µm each in a construction by laser sintering, calculated for powders having a ratio d of 0.3 (●), of 0.5 (■) and 0.7 (♦).

Claims (13)

Composition de poudre de polymère thermoplastique adaptée pour la fabrication additive par fusion sélective, dans laquelle la poudre de polymère présente
  • une granulométrie caractérisée par :
    • un diamètre moyen en volume Dv < 55 µm, et
    • un span inférieur à 1.20, et
  • telle qu’un ratio d est compris entre 0.40 et 0.55, le ratio d étant de formule suivante :

dans laquelle
dpest la densité apparente de la poudre mesurée selon la norme ISO 787-11:1981 ; et
dmest la densité du matériau mesurée sur la poudre après fusion selon la norme ISO 1183-1.A thermoplastic polymer powder composition suitable for additive manufacturing by selective melting, wherein the polymer powder has
  • a particle size characterized by:
    • an average volume diameter Dv < 55 µm, and
    • a span less than 1.20, and
  • such that a ratio d is between 0.40 and 0.55, the ratio d being of the following formula:

in which
dpis the bulk density of the powder measured according to ISO 787-11:1981; And
dmis the density of the material measured on the powder after melting according to the ISO 1183-1 standard. Composition selon la revendication 1, dans laquelle le polymère thermoplastique comprend ou est constitué d’un polymère thermoplastique choisi dans le groupe consistant en les polyesters, le chlorure de polyvinyle, le polyacétal, les polyoléfines comme le polypropylène et le polyéthylène, le polystyrène, le polycarbonate, le poly-(N-méthylméthactlumide, PMMI), le polyméthylméthacrylate (PMMA), les ionomères, les polyamides, les élastomères thermoplastiques tels que les polyétherblock amides, les PAEK, et leurs mélanges.A composition according to claim 1, wherein the thermoplastic polymer comprises or consists of a thermoplastic polymer selected from the group consisting of polyesters, polyvinyl chloride, polyacetal, polyolefins such as polypropylene and polyethylene, polystyrene, polycarbonate, poly-(N-methylmethactlumide, PMMI), polymethylmethacrylate (PMMA), ionomers, polyamides, thermoplastic elastomers such as polyetherblock amides, PAEKs, and mixtures thereof. Composition selon la revendication 2, dans laquelle le polymère thermoplastique comprend ou est constitué de PA 11, PA 12, polyamide semi-aromatique tel que le PA 11/10T, un PEBA ou un PAEK tel que le PEKK, le PEEK, le PEEK-PEDEK et le PEEK-PEmEK.Composition according to Claim 2, in which the thermoplastic polymer comprises or consists of PA 11, PA 12, semi-aromatic polyamide such as PA 11/10T, a PEBA or a PAEK such as PEKK, PEEK, PEEK- PEDEK and PEEK-PEmEK. Composition selon l’une des revendications 1 à 3, comprenant en outre un agent d’écoulement.Composition according to one of Claims 1 to 3, further comprising a flow agent. Composition selon l’une des revendications 1 à 4, dans laquelle la poudre de polymère présente un span inférieur à 1.00.Composition according to one of Claims 1 to 4, in which the polymer powder has a span of less than 1.00. Composition selon la revendication 5, dans laquelle la poudre de polymère présente un span inférieur à 0.90.Composition according to Claim 5, in which the polymer powder has a span of less than 0.90. Composition selon l’une des revendications 1 à 6, dans laquelle la poudre de polymère présente un ratio d compris entre 0.45 et 0.55.Composition according to one of Claims 1 to 6, in which the polymer powder has a ratio d of between 0.45 and 0.55. Composition selon la revendication 7, dans laquelle la poudre de polymère présente un ratio d compris entre 0.47 et 0.51.Composition according to Claim 7, in which the polymer powder has a ratio d of between 0.47 and 0.51. Composition selon l’une des revendications 1 à8, dans laquelle la poudre de polymère présente une viscosité inhérente de 0.65 à 1.50, préférentiellement de 0.85 à 1.40, et de manière davantage préférée de 1.00 à 1.30.Composition according to one of claims 1 to 8, in which the polymer powder has an inherent viscosity of 0.65 to 1.50, preferably 0.85 to 1.40, and more preferably 1.00 to 1.30. Procédé de fabrication de la composition de la poudre selon l’une des revendications 1 à 10, comprenant les étapes de :
  1. Prépolymérisation du ou des monomères du polymère thermoplastique et granulation subséquente ;
  2. Broyage en une poudre ;
  3. Tamisage subséquent éventuel de la poudre de prépolymère obtenue ; et
  4. Soumission de la poudre de prépolymère obtenue à une polycondensation en phase solide pour obtenir une poudre de polymère.
Process for manufacturing the composition of the powder according to one of Claims 1 to 10, comprising the steps of:
  1. Prepolymerization of the thermoplastic polymer monomer(s) and subsequent granulation;
  2. Grinding into a powder;
  3. Possible subsequent sieving of the prepolymer powder obtained; And
  4. Subjecting the obtained prepolymer powder to solid phase polycondensation to obtain a polymer powder.
Utilisation de la composition selon l’une des revendications 1 à 9 ou obtenue avec le procédé selon la revendication 10 pour la fabrication d’articles par fabrication additive au moyen de fusion sélective.Use of the composition according to one of Claims 1 to 9 or obtained with the process according to Claim 10 for the manufacture of articles by additive manufacturing by means of selective melting. Utilisation selon la revendication 11, dans laquelle la fabrication additive est choisie parmi le frittage sélectif par laser (Selective Laser Sintering ou SLS), frittage du type Multi Jet Fusion (MJF) et le frittage du type High Speed Sintering (HSS).Use according to claim 11, in which the additive manufacturing is chosen from selective laser sintering (SLS), sintering of the Multi Jet Fusion (MJF) type and sintering of the High Speed Sintering (HSS) type. Article susceptible d’être obtenu par fabrication additive au moyen de fusion sélective de la composition selon l’une des revendications 1 à 9 ou susceptible d’être avec le procédé selon la revendication 10.Article capable of being obtained by additive manufacturing by means of selective melting of the composition according to one of claims 1 to 9 or capable of being with the process according to claim 10.
FR2111866A 2021-11-09 2021-11-09 Polymer powder for the manufacture of high definition and low roughness parts Pending FR3128959A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR2111866A FR3128959A1 (en) 2021-11-09 2021-11-09 Polymer powder for the manufacture of high definition and low roughness parts
JP2024527170A JP2024540414A (en) 2021-11-09 2022-11-08 Polymer powders for producing high-resolution, low-roughness parts
EP22814354.1A EP4430108A1 (en) 2021-11-09 2022-11-08 Polymer powder for manufacturing high-definition components of low roughness
PCT/EP2022/081129 WO2023083809A1 (en) 2021-11-09 2022-11-08 Polymer powder for manufacturing high-definition components of low roughness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2111866A FR3128959A1 (en) 2021-11-09 2021-11-09 Polymer powder for the manufacture of high definition and low roughness parts
FR2111866 2021-11-09

Publications (1)

Publication Number Publication Date
FR3128959A1 true FR3128959A1 (en) 2023-05-12

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