EP3844210A1 - Verfahren zur additiven fertigung von werkstücken aus einem flammhemmend ausgerüsteten polyamidmaterial, dadurch erhältliche werkstücke und verwendung des polyamidmaterials - Google Patents
Verfahren zur additiven fertigung von werkstücken aus einem flammhemmend ausgerüsteten polyamidmaterial, dadurch erhältliche werkstücke und verwendung des polyamidmaterialsInfo
- Publication number
- EP3844210A1 EP3844210A1 EP19773740.6A EP19773740A EP3844210A1 EP 3844210 A1 EP3844210 A1 EP 3844210A1 EP 19773740 A EP19773740 A EP 19773740A EP 3844210 A1 EP3844210 A1 EP 3844210A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flame
- polyamide
- retardant
- melamine
- polyamide material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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 [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D 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
- 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
- C08J3/28—Treatment by wave energy or particle radiation
-
- 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
-
- 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
- C08K3/32—Phosphorus-containing compounds
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34922—Melamine; Derivatives thereof
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K2003/026—Phosphorus
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0066—Flame-proofing or flame-retarding additives
Definitions
- the invention relates to a method for the additive manufacturing of a workpiece from a flame-retardant polyamide material and the workpieces obtainable by this method.
- It also relates to a flame-retardant powdered polyamide material and its use in an additive manufacturing process.
- Additive manufacturing processes were initially used primarily for the production of individual prototypes (“rapid prototyping”). With the improvement of manufacturing processes, additive manufacturing processes are becoming increasingly important for the production of series products (“rapid manufacturing”).
- Selective laser sintering is one of the additive manufacturing processes used in industry.
- An essential application of selective laser sintering is in the production of objects from a thermoplastic.
- the thermoplastics that can be used in the SLS process are also referred to below as thermoplastic polymer materials or polymer materials for short.
- the starting point is the polymer materials which, in isotropic production processes, such as the injection molding of a polymer mass softened in an extruder, lead to products with the desired property profile.
- these include, for example, good mechanical properties, such as tensile strength, and chemical properties, such as resistance to lubricants and fuels, and good fire protection properties.
- polymers are usually given flame retardants with flame retardants.
- the polymer materials must be suitable for use under the specific process conditions of selective laser sintering. For example, at the high temperature of the powder bed near the melting temperature of the polymer material, the polymer particles must be able to be distributed evenly with a doctor blade to form a thin layer.
- the powdery polymer materials are intended to supply a powder bed that is quiet even when a protective gas flows through it.
- the end product it is necessary that products with a suitable porosity are obtained with the powdery polymer material.
- the porosity of the sintered polymer is decisive for the strength of the finished workpiece.
- the powdery polymer material must be constructed in such a way and the selective laser sintering must be carried out in such a way that there is no oversintering.
- polystyrenes A variety of polymer materials can be used in selective laser sintering. Polyolefins, polycarbonates, polyamides, polyvinyl chlorides, polybutylene terephthalates, polyacetals, polystyrenes can be used. However, the number of industrially usable polymer materials is rather small for demanding applications in the high-performance sector. Some of the materials available show an inadequate property profile.
- polyamide materials show an advantageous property profile. They have high strength and rigidity, good chemical resistance and long-term stability. In addition, they are well suited for selective laser sintering due to their good separation resolution, their level of detail and the post-treatment options.
- polyamide materials can be used in aircraft construction, they must be equipped with flame retardants.
- Inorganic-mineral flame retardants, nitrogen-containing flame retardants, phosphorus-containing flame retardants and halogen-containing flame retardants are available for the flame-retardant finishing of polymers.
- the problem with the introduction of such flame retardants is that they can influence the chemical and physical properties of polyamide materials.
- the multitude of requirements placed on polymer materials for additive manufacturing processes, in particular selective laser sintering, has led to the development of powdered special products suitable for additive manufacturing. Powdery polymer materials available on the market have therefore been specially optimized for selective laser sintering and are typically not used in injection molding and extrusion processes.
- a flame-retardant polyamide material specially developed for additive manufacturing is commercially available from EOS GmbH under the name PA 2241 FR.
- This is a polyamide 12 that contains a halogen-containing flame retardant.
- PA 2241 FR is a white polymer powder and, due to its flame-retardant properties, can be used as a high-performance plastic in the aerospace industry.
- PA 2210 FR Another flame-retardant polyamide material specially developed for additive manufacturing is commercially available from EOS GmbH under the name PA 2210 FR. This is a polyamide 12 that contains a halogen-free flame retardant. PA 2210 FR is a white polymer powder for which aerospace, electrical engineering and electrics are specified as possible areas of application.
- the invention relates to a method for additively manufacturing a workpiece from a flame-retardant polyamide material, the flame retardant for the flame-retardant finish of the polyamide material being selected from one or more of red phosphorus, phosphorus-containing compounds and flame retardants based on melamine.
- the flame retardant used in the polyamide material may consist of a single one of the above-mentioned materials, such as red phosphorus, or a combination of the above-mentioned materials, such as red phosphorus and a melamine-based flame retardant.
- the additive manufacturing process can essentially be a process carried out in a powder bed, such as selective laser sintering (SLS), selective laser melting (SLM) or selective absorbing sintering (SAS).
- SLS selective laser sintering
- SLM selective laser melting
- SAS selective absorbing sintering
- the flame retardant polyamide materials can also be used in fused deposition modeling, fused layer modeling (FLM), mask sintering and polyjet modeling.
- the flame-retardant polyamide material is processed in the form of a filament or in the form of pellets.
- the method comprises the following steps:
- the powdery flame-retardant polyamide material is well suited for processing in a powder bed. It can be spread easily and homogeneously with a doctor blade on the powder bed of the build platform and shows a very good flow behavior in the sintering process and in connection with this an advantageous layer application and particle arrangement.
- the processing window or process window is significantly enlarged. Powdery polyamide material that was not solidified during laser sintering can be reused in the installation space. The refresh rate of the laser sinter powder is high.
- the workpiece obtained based on a polyamide material and at least one flame retardant, such as red phosphorus, shows in the fire test according to AITM- 0002 method B (measurement of the fire length), according to AITM2-0007 (measurement of the flue gas density) and AITM3-0005 (toxicity ) improved fire and toxicity properties.
- Another advantage of the method according to the invention is that the workpiece, which is additionally manufactured from a powder, is obtained with a higher surface smoothness after it has been removed from the powder bed.
- the polyamide material comprises one or more polyamides or a polymer blend of one or more polyamides with one or more miscible, compatible or immiscible polymers, which are selected in particular from polyolefins, polystyrenes, thermoplastic elastomers and polyacetals, wherein the polyamide content in the polymer blend is at least 30% by weight, preferably at least 50% by weight, preferably at least 70% by weight, more preferably at least 90% by weight.
- the one or more phosphorus-containing compounds be selected from a group comprising: aromatic and aliphatic esters of phosphoric acid, such as resorcinol-bis (diphenylphosphate) (RDP), bisphenol-A- bis (diphenyl phosphate) (BPD) and its oligomers, triphenyl phosphate (TPP), tris (2-ethylhexyl) phosphate (TEHP), tricresyl phosphate (TKP), isopropylated triphenyl phosphate (ITP), ethylenediamine diphosphate, ammonium phosphate, ammonium polyatephosphate, such as Salts of hypophosphorous acid and their derivatives, such as alkyl phosphinate salts, e.g.
- aromatic and aliphatic esters of phosphoric acid such as resorcinol-bis (diphenylphosphate) (RDP), bisphenol-A- bis (diphenyl phosphate) (BPD)
- the flame retardant can consist of red phosphorus or contain red phosphorus.
- the one or more melamine-based flame retardants be selected from a group comprising: melamine, melamine derivatives, melamine condensation products, melamine salts, Meier, melam, melon, benzoguanamine, allantoin, polyisocyanurate, melamine cyanurate, melamine phosphate, Dimelamine phosphate, melamine pyrophosphate, melamine polyphosphate, melamine metal phosphates, such as melamine aluminum phosphate, melamine zinc phosphate, melamine magnesium phosphate, the corresponding pyrophosphates and polyphosphates, poly- [2,4- (piperazin-1, 4-yl) -6- (morpholine -4-yl) -1, 3,5-triazine].
- the flame retardant is incorporated into the polyamide material in a proportion in the range from 0.1 to 20% by weight, preferably 1 to 15% by weight, based on the total weight of the flame-retardant polyamide material.
- the polyamide material contains one or more polyamides selected from the group consisting of polyamide 6, polyamide 11, polyamide 12, polyamide 6.6, polyamide 6.9, polyamide 6.10, polyamide 6.12, polyamide 10.10 and copolyamides thereof, such as polyamide 6/12, PA 6.6 / 6.10, or consists of one or more of these polyamides. It is particularly preferred that the polyamide material consists of polyamide 6 or polyamide 6 in a proportion of at least 30% by weight, preferably at least 50% by weight, preferably at least 70% by weight, more preferably at least 90% by weight contains.
- a powdered flame-retardant polyamide material which delivers particularly good results in selective laser sintering comprises polyamide 6 and red phosphorus (hereinafter abbreviated to: PA6-RP), the red phosphorus preferably being present in a proportion of 1 to 15% by weight.
- PA6-RP red phosphorus
- the workpiece obtained by selective laser sintering from PA6-RP shows good fire properties, which are also retained in connection with lacquers. With a higher proportion of red phosphorus, such as 14%, V0 can also be achieved in the UL-94 standard. An important fire property is achieved, such as z. B. is required in the railway industry.
- PA6-RP workpieces show improved properties in fire testing according to AITM-0002 method B (measuring the fire length), according to AITM2-0007 (measuring the smoke density) and AITM3-0005 (toxicity). A heat resistance of at least 85 ° C was determined. Due to this fire behavior, workpieces available from PA6-RP in the additive manufacturing process can be used for the interior of aircraft.
- Powdered PA6-RP shows a very good flow behavior in the sintering process with regard to layer application and particle arrangement.
- the material consolidates well. A high degree of form accuracy (little distortion) is found.
- the processing window (process window) is significantly enlarged. Powdered PA6-RP that has not solidified can be reused in the installation space. It shows a high refresh rate.
- the polyamide material contains, in addition to the flame retardant, other auxiliaries, in particular antistatic agents, dyes such as, for example soluble inorganic and / or organic pigments and / or insoluble dyes, fillers, such as, for example, glass fibers, chalk, graphite, carbon black, lubricants, stabilizers and plasticizers.
- auxiliaries in particular antistatic agents, dyes such as, for example soluble inorganic and / or organic pigments and / or insoluble dyes
- fillers such as, for example, glass fibers, chalk, graphite, carbon black, lubricants, stabilizers and plasticizers.
- the powdered, flame-retardant polyamide material has a particle size, in particular in the range from 40 to 110 m ⁇ ti.
- the angular surface of the particles of the powdery material obtained after grinding can be rounded before or after sieving.
- step c) the powder layer is irradiated with laser radiation with a wavelength that lies within the absorption band of the flame retardant, in particular of red phosphorus.
- the absorption by the flame retardant contributes to the required heating of the sintered powder.
- step c) the powder layer is irradiated with laser radiation with a wavelength that lies outside the absorption band of the flame retardant, in particular of red phosphorus, which is in particular on the long-wave side of visible light or more precisely in the range the infrared radiation is above 3000 nm.
- the powder layers are exposed outside the absorption band of the flame retardant, in particular of red phosphorus, the required heating of the sintered powder advantageously takes place predominantly through absorption of the polyamide material.
- the laser radiation is emitted by an infrared laser, such as a CO2 laser, an Nd: YAG laser or a fiber laser.
- an infrared laser such as a CO2 laser, an Nd: YAG laser or a fiber laser.
- the laser energy radiated in step c) is in the range from approximately 0.10 to 0.30 J / mm 3 , preferably approximately 0.15 to 0.25 J / mm 2 , in particular approximately 0.2 J / mm 2 mm 3 lies.
- the procedure for determining the optimally radiated energy is described in connection with the exemplary embodiment.
- the invention relates to a flame-retardant workpiece that can be obtained by an additive manufacturing process as described above.
- the invention relates to the use of a flame-retardant polyamide material, which is as defined above and in particular is in powder form, for additive manufacturing, in particular by means of selective laser sintering or selective laser melting, of a flame-retardant workpiece , in particular a flame-retardant workpiece with a high surface smoothness.
- the invention relates to a flame-retardant polyamide material, as defined above and in particular in powder form, for the additive manufacturing of a flame-retardant workpiece, in particular by selective laser sintering or selective laser melting.
- the flame-retardant powdered polyamide material is obtainable from
- the angular surface of the particles obtained from the pulverulent material can be rounded off.
- the additive manufacturing method according to the invention in particular selective laser sintering, can be used for the manufacture of various workpieces, in particular components for interior applications in aircraft, such as interior fittings, for example system installations. Molded edge protectors can be manufactured to protect sandwich components in the aircraft interior, such as corner connector butt strips.
- the improved flame retardant properties by combining a polyamide material with a flame retardant as defined above, such as in particular red phosphorus, is particularly important for the pressurized area of the aircraft.
- FIGS. 1 to 5 The invention is described below on the basis of an exemplary embodiment with reference to FIGS. 1 to 5, in which:
- Fig. 3 shows the photographic representation of the flow behavior of in the drum of
- Revolution Powder Analyzers rotating powdered polyamide materials shows a system for carrying out the additive manufacturing of workpieces according to the invention and workpieces used for comparison;
- FIG. 5 shows a diagram in which the component density is plotted as a function of the volume energy density.
- a flame-retardant polyamide material according to the invention which comprises polyamide 6 as the polymer base and red phosphorus as the flame retardant (hereinafter referred to as PA6-RP), a polyamide material made of polyamide 6 without flame retardant (hereinafter referred to as PA6) and a polyamide material made from polyamide are examined 12 with proven suitability for selective laser sintering as a second comparison (hereinafter referred to as PA12).
- the powdered PA6-RP and the powdered PA6 are processed into test specimens by selective laser sintering.
- the proportion of red phosphorus in the PA6-RP can advantageously be 1 to 15%.
- the PA6-PR used in the following experiments contains 3 to 6% red phosphorus.
- a cast PA6-RP block or a coarse-grained granulate is used as the starting material for the production of the PA6-RP sinter powder.
- the block or granulate is cryogenically ground with a mill to a fine, powdery material.
- a sieve fraction with a grain size distribution desired for additive manufacturing is obtained.
- the particles After cryogenic grinding, the particles have, for example, a particle size in the range from 40 to 110 m ⁇ ti and in particular an angular, irregular surface.
- the comparative powdered PA6 without flame retardant is produced using the same process.
- Powdered PA6-RP, PA6 and PA12 are analyzed in a Revolution Powder Analyzer (RPA).
- RPA Revolution Powder Analyzer
- the powdered PA6-RP and PA6 obtained in this way are placed in the powder storage container 118 of the manufacturing device 100 according to FIG. 4.
- the optimal laser energy is first determined in laser sintering experiments. Subsequently, test specimens are produced for further investigations by selective laser sintering.
- the preliminary tests for determining the density of the workpieces as a function of the exposure parameters and the production of test specimens are carried out in a conventional laser sintering system, the structure of which corresponds to the manufacturing device 100 shown schematically in FIG. 4.
- the manufacturing device 100 has a CO2 laser 104, a system for guiding the laser beam 106, a powder bed 108 with a vertically movable construction platform 110, in which the workpiece 102 is produced, a powder storage container 118, a powder collecting container 124 and a powder application device 112 with a Squeegee 120 on. Furthermore, a control device 114 is provided for controlling the manufacturing process.
- control device 114 controls the laser beam steering device 106 and thus the speed of the focused laser in the building plane, the laser power, the vertical movement of the building platform 110 and the horizontal movement of the powder application device 112.
- the laser sintering system furthermore has one or more heating devices for heating the powdery polyamide material or material powder 116 in the powder bed to a temperature above the glass transition temperature and below the melting temperature of the powdery polyamide material (heating devices not shown).
- the sintered powders 116 made of PA6-RP or PA6 produced under A. are shaped into the workpiece 102 in the laser beam powder bed manufacturing device 100.
- the CO2 laser 104 generates a high-energy laser beam at a wavelength of 10.6 m ⁇ ti, with which the powdered PA6-RP and the powdered PA6 are shaped into test specimens.
- the powdered PA6-RP 116 from the powder reservoir 118 with the doctor blade 120 is distributed uniformly and repeatedly in thin powder layers on the building platform 110.
- a powder collecting container 124 is provided, which holds excess powdered PA6-RP or PA6.
- Data on the shape of the workpiece 102 are stored in the control device 114.
- the control device 114 then directs the laser beam 122 by means of the laser beam steering device 106 such that the entire cross section of the workpiece 102 is consolidated at the level of this layer.
- the control device 114 then moves the building platform 110 downward by a certain amount in order to apply the next layer of powder and to solidify the cross section again.
- Selective laser sintering produces porous workpieces, with the porosity and density of the material depending on the exposure parameters, such as beam diameter and beam power and the speed at which the laser beam moves across the powder layer. These physical parameters determine the amount of energy introduced into a certain volume of the powder layer (measured quantity here is J / mm3). Since the porosity and density of the sintered workpiece are decisive for the material properties, such as workpiece strength, the best exposure conditions for PA6-RP are determined in preliminary tests. Table 1 shows the results for 19 tests with different parameters, Table 2 the results of the density measurement and the evaluation. The evaluation is made with: +++ (particularly well suited), ++ (well suited) to + (usable).
- test specimen 102 made of PA6-RP and PA6 in the form of test specimens for the investigation of the fire behavior are produced in the setting device 100.
- the test specimens are pulled out of the powder bed. Loose sinter powder adhering to the test specimens can be easily removed. The surface of the test specimen is smooth.
- PA6-RP is suitable for the production of components for the interior of aircraft, such as the pressurized area.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018121230.5A DE102018121230A1 (de) | 2018-08-30 | 2018-08-30 | Verfahren zur additiven Fertigung von Werkstücken aus einem flammhemmend ausgerüsteten Polyamidmaterial, dadurch erhältliche Werkstücke und Verwendung des Polyamidmaterials |
| PCT/EP2019/073230 WO2020043886A1 (de) | 2018-08-30 | 2019-08-30 | Verfahren zur additiven fertigung von werkstücken aus einem flammhemmend ausgerüsteten polyamidmaterial, dadurch erhältliche werkstücke und verwendung des polyamidmaterials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3844210A1 true EP3844210A1 (de) | 2021-07-07 |
Family
ID=68062886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19773740.6A Withdrawn EP3844210A1 (de) | 2018-08-30 | 2019-08-30 | Verfahren zur additiven fertigung von werkstücken aus einem flammhemmend ausgerüsteten polyamidmaterial, dadurch erhältliche werkstücke und verwendung des polyamidmaterials |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3844210A1 (de) |
| DE (1) | DE102018121230A1 (de) |
| WO (1) | WO2020043886A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388974B (zh) * | 2020-10-13 | 2024-08-27 | 华侨大学 | 粉体流动性及铺展特性的检测设备及其检测方法 |
| CN112409784B (zh) * | 2020-11-27 | 2023-04-11 | 湖南华曙高科技股份有限公司 | 一种选择性激光烧结用防滴落尼龙材料及其制备方法 |
| WO2024036299A1 (en) * | 2022-08-12 | 2024-02-15 | 3D Systems, Inc. | Flame resistant compositions for additive manufacturing and associated printed 3d articles comprising expandable graphite |
| US20240059909A1 (en) * | 2022-08-12 | 2024-02-22 | 3D Systems, Inc. | Flame resistant compositions for additive manufacturing and associated printed 3d articles comprising oxygen-deprivation additives |
| CN115594475B (zh) * | 2022-09-28 | 2023-06-30 | 杭州蓝田涂料有限公司 | 一种保温石膏基自流平砂浆及其制备方法 |
| WO2026005715A1 (en) * | 2024-06-28 | 2026-01-02 | Technická Univerzita V Košiciach | The principle of shell objects creation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004001324A1 (de) * | 2003-07-25 | 2005-02-10 | Degussa Ag | Pulverförmige Komposition von Polymer und ammoniumpolyphosphathaltigem Flammschutzmittel, Verfahren zu dessen Herstellung und Formkörper, hergestellt aus diesem Pulver |
| DE10334497A1 (de) * | 2003-07-29 | 2005-02-24 | Degussa Ag | Polymerpulver mit phosphonatbasierendem Flammschutzmittel, Verfahren zu dessen Herstellung und Formkörper, hergestellt aus diesem Polymerpulver |
| DE102004012683A1 (de) * | 2004-03-16 | 2005-10-06 | Degussa Ag | Lasersintern mit Lasern mit einer Wellenlänge von 100 bis 3000 nm |
| FR2873380B1 (fr) * | 2004-07-20 | 2006-11-03 | Arkema Sa | Poudres de polyamides ignifuges et leur utilisation dans un procede d'agglomeration par fusion |
| US20060041041A1 (en) * | 2004-07-20 | 2006-02-23 | Patrick Douais | Fireproofing polyamide powders and their use in a sintering process |
| CN106987116A (zh) * | 2017-04-28 | 2017-07-28 | 湖南华曙高科技有限责任公司 | 用于选择性激光烧结的无卤阻燃尼龙材料及其制备方法 |
-
2018
- 2018-08-30 DE DE102018121230.5A patent/DE102018121230A1/de not_active Withdrawn
-
2019
- 2019-08-30 EP EP19773740.6A patent/EP3844210A1/de not_active Withdrawn
- 2019-08-30 WO PCT/EP2019/073230 patent/WO2020043886A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018121230A1 (de) | 2020-03-05 |
| WO2020043886A1 (de) | 2020-03-05 |
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