Covestro Deutschland Ag

Stratasys, Inc.

Parker-hannifin Corporation

Covestro Intellectual Property Gmbh & Co. Kg

Thomas Büsgen

Dirk Achten

Roland Wagner

Nicolas Degiorgio

Levent Akbas

Dirk Dijkstra

Christoph Tomczyk

Michael Ludewig

Bettina Mettmann

Jörg Tillack

Rolf Wehrmann

Hans-Josef Laas

Helmut Werner Heuer

Jörg Büchner

Jürgen Hättig

Jan Weikard

Thomas Fäcke

Michael Kessler

Thomas Michaelis

Frank Richter

Martin Melchiors

Eckhard Wenz

Harald Kraus

Rolf Gertzmann

Peter Reichert

Joachim Wagner

Gerhard Maier

Christoph Eggert

Wolfgang Arndt

Florian Johannes Stempfle

Stefanie Eiden

Jonas Kuenzel

Paul Heinz

Fabian Schuster

Florian Golling

Werner Jenninger

Evelyn Peiffer

Richard Meisenheimer

Ting Liu

Maximilian Wolf

Ralf Rott

Jonas Künzel

Robert Gärtner

Julien Guiu

Alisa Kayser

Arnaud Guedou

Maria Elisabeth Beenen-Fuchs

Maria Elisabeth Beenen-fuchs

Rolf Albach

Ingo Steffens

The invention relates to a method for producing an at least partially coated object, comprising the step of producing the object from a construction material by means of an additive manufacturing method, the construction material comprising a thermoplastic polyurethane material. Following the production of the object, the method comprises the step of at least partially bringing a preparation into contact with the object, the preparation being selected from: an aqueous polyurethane dispersion; an aqueous dispersion of a polymer comprising OH groups, this dispersion also containing a compound comprising NCO groups; an aqueous preparation of a compound containing NCO groups, but not containing any polymers comprising OH groups; or a combination of at least two thereof. The invention also relates to an at least partially coated object that was obtained by a method according to the invention.

Method for producing an at least partially coated object

It is a feature of a porous body () comprising a three-dimensional network of node points () joined to one another by struts (), and a void volume () present between the struts (), that the struts () have an average length of ≥200 to ≤50 mm, the struts () have an average thickness of ≥100 μm to ≤5 mm, and that the porous body has a compression hardness (40% compression, DIN EN ISO 3386-1: 2010-09) in at least one spatial direction of ≥10 to ≤100 kPa. The porous body according to the invention combines the advantages of a conventional mattress or cushion with ventilatability which results from its porous structure and is not achievable in conventional foams. The invention further relates to a method of producing such a porous body () and to an apparatus comprising said body () for supporting and/or bearing a person.

Porous body, additive manufacturing method for the body and apparatus for supporting and/or bearing a person

A method for producing an article in which a layer with a radically cross-linkable resin is selectively crosslinked at least partially. This takes place according to a selected cross section of the article to be formed by means of selective application of a radical initiator. The at least partially crosslinked material is added on layer by layer to a carrier or to previous layers bonded to the carrier. A system that is suitable for carrying out the method according to the invention has a substrate, a control unit, an application unit for applying the resin to the substrate, an application unit for applying an initiator to the resin, an energy exposure unit and a contacting unit.

Method for producing an article by layer-by-layer buildup with separately patterned resin and initiator wherein the resin has a storage modulus greater than loss modulus at 20 C

The present invention relates to polymerizable compositions which contain components that can be crosslinked both via isocyanurate bonds and by a radical reaction mechanism. The invention further relates to methods by way of which polymers can be produced from said compositions.

Dual-curing isocyanurate polymers

A process for producing an object from a precursor comprises the steps of: I) depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; II) depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; III) repeating step II) until the precursor is formed; IV) treating the precursor obtained after step III) under conditions sufficient to at least partially trimerize to isocyanurate groups NCO groups present in the free-radically crosslinked resin of the obtained precursor to obtain the object.

Method for producing an object from a precursor, and use of a radically crosslinkable resin in an additive production method

The invention relates to a method for producing an object from a construction material, the construction material comprising radically crosslinkable groups, NCO groups and groups having Zerewitinoff active H atoms, and the object being a three-dimensional object and/or a layer. During and/or after the production of the object, the construction material is heated to a temperature of &#x3e;50&#xb0; C., and the construction material comprises one or more cyclic tin compounds of formula F-I, F-II and/or F-III.

Dual cure method using Zerewitinoff-active H tin catalysts

The invention relates to a method for producing an object by means of a fused deposition modeling method (FDM), from a construction material, wherein the construction material comprises a polycarbonate and a di-glycerol ester. The invention also relates to the use of a polycarbonate with improved flowability comprising a diglycerol as construction material in an additive fused deposition modeling method.

Method for producing an object by means of an additive manufacturing process using a polycarbonate building material with improved flowability

A process is described for producing a three dimensional structure, the process including the following steps a) applying of at least a first material Monto a substrate to build a first layer Lon the substrate; b) layering of at least one further layer Lof the first material Mor of a further material Monto the first layer L, wherein the at least one further layer Ly covers the first layer Land/or previous layer Lat least partially to build a precursor of the three dimensional structure; c) curing the precursor to achieve the three dimensional structure; wherein at least one of the materials Mor Mprovides a Mooney viscosity of &#x3e;10 ME at 60&#xb0; C. and of &#x3c;200 ME at 100&#xb0; C. before curing and wherein at least one of the first material Mi or of the further material Mis a powder. Also, a three dimensional structure is described which is available according to the process according to the invention.

Process for producing 3D structures from powdered rubber material and its products

The invention relates to a method for producing an object, comprising the step of producing the object from a construction material by means of an additive manufacturing process, wherein the construction material comprises a plurality of thermoplastic polyurethane materials. The materials differ by at least one mechanical property such as the shore hardness or the elongation at break. The invention also relates to an object obtained according to said method.

Additive manufacturing process using several thermoplastic polyurethanes

A process for manufacturing an article comprises the steps of: I) applying a filament of an at least partially fused construction material to a support so as to obtain a layer of the construction material which corresponds to a first selected cross-section of the article; II) applying a filament of the at least partially fused construction material to a previously applied layer of the construction material so as to obtain a further layer of the construction material which corresponds to a further selected cross-section of the article and which is bonded to the previously applied layer; and III) repeating step II) until the article is formed. At least steps II) and III) are carried out in a chamber and the construction material comprises a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of &#x2265;20&#xb0; C. to &#x2264;100&#xb0; C. The fusible polymer further has a complex viscosity |&#x3b7;*| (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100&#xb0; C. and a shear rate of l/s) of &#x2265;10 Pas to &#x2264;1000000 Pas. Finally, the temperature inside the chamber is &#x2264;50&#xb0; C. The invention also relates to an article manufactured by the process according to the invention, to an article having a substrate and to an article bonded to the substrate, the article being in the form of an adhesive joint or varnish region, and to the use of a particular polyurethane in fused deposition modeling-based additive manufacturing processes.

Fused deposition modeling-based additive manufacturing process at low temperatures

The present invention relates to a method for producing an object, comprising the step of producing the object according to an additive production process from a construction material, wherein the construction material comprises a mixture of a plurality of powdery thermoplastic materials which are different from one another due to at least one mechanical property and at least one thermoplastic material is a thermoplastic polyurethane material. The invention also relates to an object obtained according to said method.

Additive production process using a mixed thermoplastic construction material

A method for producing an object with layers of different materials in an additive manufacturing process comprises the following steps: &#x2022;I) providing a construction material heated at least in part to a temperature above its glass transition temperature on a substrate, so that a layer of the construction material is obtained which corresponds to a first selected cross section of the object; &#x2022;II) providing a construction material heated at least in part to a temperature above its glass transition temperature on a previously provided layer of the construction material, so that another layer of the construction material is obtained which corresponds to another selected cross section of the object and which is connected to the previously provided layer; &#x2022;III) repeating step II) until the object is formed. In the individual steps II) in the method, the construction material is selected each time from a first construction material and a second construction material different from the first, the first construction material being a polycarbonate, polyester, polyester carbonate, polyimide, polylactic acid, polyvinyl chloride, polystyrene, polymethyl(meth)acrylate or mixtures of at least two thereof. Step II) is carried out at least once with the first construction material and step II) is carried out at least once with the second construction material. The invention further relates to an object that is obtainable using the method described above.

Layered manufacturing process for an object with different layer material and object with different layer material

The invention relates to a method for the mechanical testing of a structure () formed as one part, comprising the following steps: a) identifying a sub-element () in the structure () formed as one part for generating a test element (') that is intended to undergo mechanical testing, wherein the sub-element () only represents a portion of the structure () formed as one part, b) determining the spatial-geometrical structure of the sub-element (), c) generating the test element (&#x2032;) on the basis of the spatial-geometrical structure of the sub-element () and at least in part or in full by way of a 3D printing process, d) carrying out at least one mechanical test on the test element (&#x2032;) generated. A further subject matter of the present invention is a method for modifying the structural design data of the structure () formed as one part, in which the data of the mechanical testing that is obtained from the aforementioned method is used for a modification of the structural design data of the structure ().

Method for the mechanical testing of a structure formed as one part on the basis of test pieces generated by a 3D printing process

A process is described for producing a three dimensional structure, the process including the following steps a) applying of at least a first material Monto a substrate to build a first layer Lon the substrate; b) layering of at least one further layer Lof the first material Mor of a further material Monto the first layer L, wherein the at least one further layer Lcovers the first layer Land/or previous layer Lat least partially to build a precursor of the three dimensional structure; c) curing the precursor to achieve the three dimensional structure; wherein at least one of the materials Mor Mprovides a Mooney viscosity of &#x3e;10 ME at 60&#xb0; C. and of &#x3c;200 ME at 100&#xb0; C. before curing. Also, a three dimensional structure is described which is available according to the process according to the invention.

Process for producing 3D structures from rubber material

The invention relates to a print head () for an additive fused deposition modelling method having a thermoplastic construction material, comprising:&#x2014;at least one inlet () for receiving a construction material () into the print head;&#x2014;at least one melt region, for melting the construction material (), which is arranged downstream of the inlet () and is fluidically connected, at least temporarily, to the inlet (); and&#x2014;at least one first outlet () that is fluidically connected, at least temporarily, to the melt region (), for discharging melted construction material () out of the melt region () at a first discharge rate; wherein&#x2014;the print head () also comprises at least one second outlet () that is fluidically connected, at least temporarily, to the melt region () for discharging melted or non-melted construction material () out of the melt region () at a second discharge rate; and&#x2014;the first discharge rate can be influenced by a first discharge rate influencing device () for the melted construction material ().

Print head, method and system for 3D printing having variable discharge rate

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Leverkusen, Germany

Thomas Büsgen