Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Stratasys, Inc.

Karlsruher Institut Fur Technologie

Dirk Dijkstra

Dirk Achten

Roland Wagner

Thomas Büsgen

Nicolas Degiorgio

Levent Akbas

Peter Reichert

Harald Kraus

Wolfgang Arndt

Jörg Büchner

Matthias Wintermantel

Pantea Nazaran

Heinz-Werner Lucas

Lothar Stempniewski

Moritz Urban

Friedrich-Karl Bruder

Thomas Fäcke

Thomas Rölle

Marc-Stephan Weiser

Dennis Hönel

Sebastian Dörr

Joachim Petzoldt

Christoph Thiebes

Bettina Mettmann

Christoph Tomczyk

Michael Kessler

Peter Kueker

Jürgen Hättig

Ute Flemm

Juergen Kempkes

Thomas Busgen

Daniel Hentschel

Arnaud Guedou

Udo Wipperfuerth

Ruediger Musch

Thomas BÜSGEN

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 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

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 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

A method for reinforcing a part of a building comprises the step of adhesively bonding a textile to the surface of the part of a building by means of an adhesive. The invention relates further to such a reinforced part of a building and to the use of a textile in combination with an adhesive for reinforcing a part of a building, wherein the textile is adhesively bonded to the surface of the part of a building by means of an adhesive.

Method for reinforcing a building component

A process for manufacturing an article comprises the steps of: applying a layer that consists of particles to a target area; allowing, in a chamber, energy to act on a selected portion of the layer, according to a cross-section of the article, so that the particles in the selected portion are bonded, and repeating the steps of applying and allowing energy to act for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form the article, at least part of the particles comprising 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 1/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 powder-based additive manufacturing processes.

Powder-based additive manufacturing process at low temperatures

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 &#x2265;200 &#x3bc;m to &#x2264;50 mm, the struts have an average thickness of &#x2265;100 &#x3bc;m to &#x2264;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 &#x2265;10 to &#x2264;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.

This invention relates to a holographic medium comprising a protective layer and a photopolymer film which is bonded to the protective layer and contains polyurethane matrix polymers, acrylate writing monomers and photoinitiators, wherein the protective layer is impermeable to the constituents of the photopolymer film, is optically clear and is transparent to electromagnetic radiation having a wavelength in the range of from 350 to 800 nm. The invention further provides the use of a holographic medium according to the invention in the production of holograms, and a process for the production of a holographic medium according to the invention.

Holographic medium having a protective layer

The invention relates to an aqueous adhesive composition containing at least one acrylate polymer with a glass transition temperature Tg&#x3e;50&#xb0; C. and at least one amorphous polyurethane or polyurethane-polyurea polymer with a glass transition temperature Tg&#x3c;+10&#xb0; C., the use of the adhesive compositions for the manufacture of heat-activated adhesive layers, and planar formations containing adhesive layers based on the adhesive composition.

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Odenthal, Germany

Dirk Dijkstra