Abstract: A method for producing an object comprises the step of producing the object by means of an additive manufacturing process from a construction material. The construction material comprises a first polyurethane polymer which has: a weight percentage ratio of O to N of ?2 to ?2.5, determined by elementary analysis; a weight percentage ratio of N to C of ?0.1 to ?0.25, determined by elementary analysis; a full-width at half maximum of the melting peak of ?20 K, determined by dynamic differential scanning calorimetry DSC (2nd heating at heating rate 20 k/min); and a difference between the melting temperature and the recrystallisation temperature of ?5 K and ?100 K, determined by dynamic differential scanning calorimetry DSC (2nd heating) at a heating and cooling rate of 20 K/min.

Abstract: In an embodiment a nanostamping method includes forming a nanostructure in a layer of optical embossing material on a first carrier substrate by a forming stamp having a nano-relief, wherein the nanostructure comprises a plurality of nano-elevations which are connected via an embossing material base, generating a coated nanostructure by covering the nano-elevations with a filler material layer, wherein the filler material layer and the optical embossing material comprise different refractive indices, applying a second carrier substrate on the coated nanostructure, detaching the first carrier substrate and removing a material of the embossing material base.

Abstract: The disclosure relates to the technical field of nonwoven fabric manufacturing, in particular to a novel antibacterial breathable fabric and a preparation method thereof. The preparation method includes following steps: S1, surface hot rolling treatment: performing the surface hot rolling treatment on a fiber mesh layer, where a lower surface of the fiber mesh layer is supported by a flexible belt, and a hot rolling member contacts and hot rolls an upper surface of the fiber mesh layer, so as to prepare the fiber mesh layer with fibers on the upper surface thermally bonded and fibers on the lower surface fluffy; and S2, spunlace processing treatment: performing the spunlace processing treatment on the lower surface of the fiber mesh layer prepared in the S1; and the flexible belt is made of a high-temperature resistant flexible material.

Abstract: A system and method for manufacturing three-dimensional structures is provided. The system comprises a plurality of printing stations for performing parallel printing in an confined space enclosed by a housing, wherein each printing station comprises a carrier, a deposition unit with at least one nozzle arranged for dispensing filaments of build material paste through an opening area thereof and a station controller configured to operate the deposition unit for deposition of filaments of a build material paste on the carrier in an interconnected arrangement in a plurality of stacked layers in order to form one or more three-dimensional structures, the at least one nozzle and the detachable carrier being relatively moveable with respect to each other, wherein the deposition unit is coupled to a reservoir unit configured to house the build material paste, wherein the reservoir unit includes at least one reservoir arranged outside of the confined space.

Abstract: A weather seal includes an elongated micro-cellular foam bulb, and an elongated micro-cellular foam fin element attached to an extending along the length of the foam bulb. The fin elements includes a spine having opposed planar surfaces and at least one microcellular foam barb extending outwardly and at a downward angle from each surface and along the length of the spine. As an alternative to barbs, another option is to use a higher durometer foamed thermoplastic elastomer in a hollow circle shape that would push into a retention pocket. A t-slot version that has a foamed bulb and a polypropylene base is another option.

Abstract: A method of making nonwoven webs comprising providing a spinneret including a pattern of conduits forming an extrusion region; directing only a first stream of molten propylene polymer into a region adjacent the first side of the spinneret, directing only a second stream of molten propylene polymer into a region distal to the first side of the spinneret, extruding only the first stream propylene polymer through the exit openings in a first zone where the exit opening comprises exit ports in the first zone having a first density; extruding only the second stream propylene polymer through the exit openings of a second zone where the exit opening comprises exit ports in the second zone having a second density less than the first density; and the second zone is distal to the first side with the first zone being between the second zone and the first side.

Abstract: Cardiac tissue-on-a-chip platforms aimed at mimicking human cardiac tissue structures, are valuable tools to model, and serve as preclinical platforms for drug testing or therapies for cardiac repair. We have developed three types of electrospun scaffolds including furfuryl gelatin (f-gelatin) alone, with polycaprolactone (PCL) in the ratio of f-gelatin and PCL (1:1), and coaxial scaffolds with PCL (core) and f-gelatin (sheath). Scaffolds were developed through single nozzle electrospinning and coaxial electrospinning, respectively, to serve as scaffolds for cardiac tissue-on-a-chip platforms.

Abstract: There is provided a method of forming a structure that is in contact with an object, the method comprising: (i) supporting a flowable precursor with a flowable support at a position that allows said flowable precursor to be in contact with the object; and (ii) crosslinking at least part of the flowable precursor that is in contact with the object to form a structure that is in contact with the object, wherein a top surface of the part of the flowable precursor that is to be crosslinked, is in interface with a fluid medium. Also provided is a system for performing the method.

Abstract: A method of recycling a PET-containing material comprises: (1) providing a polymer crystallizer comprising at least one heating element, and at least one blower; (2) providing an MRS extruder having an MRS section comprising a plurality of satellite screws; (3) providing a vacuum pump in fluid communication with the MRS section; (4) grinding and washing the PET-containing material; (5) heating the PET-containing material in the crystallizer to at least partially dry the PET-containing material; (6) shearing the PET-containing material in the MRS extruder to produce a PET-containing melt; (7) increasing a surface area of the PET-containing melt by distributing the PET-containing melt across a plurality of satellite screws in the MRS extruder; (8) drawing off vapors from the PET-containing melt by reducing the pressure in the MRS section with the vacuum pump; (9) collating the PET-containing melt in the MRS extruder; and (10) extruding a recycled PET-containing material.

Abstract: The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, using a part material (M) comprising at least one poly(ether ketone ketone) (PEKK) polymer, in particular to a 3D object obtainable by Fused Deposition Modelling (FDM) or Fused Filament Fabrication (FFF) from this part material (M).

Abstract: A method for forming an object includes moving a recoat assembly (200) in a coating direction over a build material, wherein the recoat assembly (200) comprises a first roller (202) and a second roller (204) that is spaced apart from the first roller; rotating the first roller (202) of the recoat assembly in a counter-rotation direction, such that a bottom of the first roller moves in the coating direction; contacting the build material with the first roller of the recoat assembly, thereby fluidizing at least a portion of the build material; irradiating, with a front energy source (260) coupled to a front end of the recoat assembly, an initial layer of build material positioned in a build area; subsequent to irradiating the initial layer of build material, spreading the build material on the build area with the first roller, thereby depositing a second layer of the build material over the initial layer of build material; and subsequent to spreading the second layer of the build material, irradiating, with a r

Abstract: An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.

Abstract: The invention relates to an additive manufacturing process for producing a silicone elastomer item. In particular, the invention relates to an additive manufacturing method for producing a silicone elastomer item from a photocrosslinkable silicone composition. The invention also relates to a photocrosslinkable silicone composition.

Abstract: A method of forming prefabricated units used in production of systems of prosthetic aortic valve transcatheter implantation and prosthetic aortic valve prefabricated unit with an non-thrombogenic smooth surface layer or with a porous fibrous layer constituting a scaffold for epithelium cell culture, intended for manufacturing TAVI system. Stents for covering and solutions of polycarbonate silicones and/or polycarbonate urethanes and/or polyurethane with average molecular weight in the range from 50 000 g/mol to 200 000 g/mol in the solvent DMAC are prepared. Initially a smooth layer of polycarbonate silicone is applied in the electrospinning machine by electrospraying with use of the solution in DMAC with the concentration of 2-8% w/w.

Abstract: The invention describes a process for starting up a film production in a film manufacturing machine, in particular a blown film machine, by means of a control device, comprising the following steps: detecting a start-up request setting start-up parameters providing film material commencing the film production setting film production parameters.

Abstract: A method is provided for treating the surface of a shaped melded part produced with a plastic having ester, ketone and/or ether bonds. The plastic is selected from the group including a polymer, copolymer, polymer blend and combinations of the same. The method includes a pretreatment step for cationically modifying the surface of the melded shaped part. The cationic modification is carried out with a reactant dissolved in a solvent and having one or more amine, imine and/or amide groups.

Abstract: This invention relates to a method and apparatus for creating a three-dimensional structure from a binder-free powder. A corona discharge (plasma) generator forms a controllable electric field, positioning the binder-free powder within the influence of the electric field generated by the corona discharge generator, and activating the corona discharge generator to attract the binder-free powder into a three-dimensional structure. The corona discharge generator includes a grounded bottom substrate and a top substrate elevated above the bottom substrate in a substantially parallel planar orientation. The binder-free powder is placed in the interstitial space between the bottom substrate and the top substrate. An electrode above the top substrate, in electrical communication with the bottom substrate and coupled to a voltage power supply, creates the electrical field. The resulting three-dimensional structure is formed far more rapidly than known additive manufacturing techniques.

Abstract: The method for producing wet spun fibers/a wet formed film using a double-walled pipe type micronozzle apparatus according to the present invention is a production method, wherein, in a step of extruding an internal phase comprising a fiber/film material and a good solvent for the fiber/film material in a linear form from the circular/rectangular end of the internal pipe of the apparatus into an external phase comprising a poor solvent for the fiber/film material, the external phase flowing in the external pipe of the apparatus, the ratio of the external phase flow rate to the internal phase flow rate is set to 1 or more, and further for the wet spun fibers, the external phase line speed at the orifice portion at which the internal phase and the external phase merge is set to 0.1 ms?1 or more.

Abstract: There is provided a method of manufacturing a concrete product. A composition including a slag-based binder, an aggregate, water and an additive selected from the group consisting of calcium chloride, ground eggshells, sodium carbonate, sodium bicarbonate, sodium hydroxide, fine calcium carbonate, calcium oxide, borax, ammonium chloride and combinations thereof, is mixed to obtain a concrete mixture. The concrete mixture is formed into a desired shape to obtain a formed concrete, the formed concrete having a first water-to-binder ratio. The formed concrete is dried to obtain a dried concrete having a second water-to-binder ratio less than the first water-to-binder ratio. The concrete mixture is carbon cured to obtain the concrete product.

Abstract: Methods for forming optical articles with antireflective nanostructured (ARN) surfaces. An aluminum layer is deposited or otherwise applied to the cavity of an injection mold tool. Sequential chemical treatments such as anodization and etching steps form an ARN mold texture on the interior surface of the cavity. The ARN mold texture is a negative of a desired surface texture of the article. During injection molding, the desired ARN surface is thereby produced in the optical article.