The present invention relates to radiation curable compositions, comprising (A1) at least one water-soluble reactive diluent (A1); (A2) at least one water-soluble reactive oligomer (A2); (B) at least one reactive component selected from the group consisting of a water insoluble reactive diluent (B1a), a slightly water-soluble reactive diluent (B1b) and a water insoluble, or slightly water-soluble reactive oligomer (B2); and (C) optionally a photoinitiator (C), wherein the amount of component (A1) and (A2) is greater than 20% by weight, especially 30% by weight based on the amount of components (A1), (A2), (B1a), (B1b) and (B2) and the amount of components (B1a), (B1b) and (B2) is greater than 10% by weight, especially 20% by weight based on the amount of components (A1), (A2), (B1a), (B1b) and (B2); radiation curable composition, comprising (A1′) at least one slightly water-soluble reactive diluent (B1b); (A2) at least one water-soluble reactive oligomer (A2); (B) at least one reactive component selected from the group consisting of a water insoluble reactive diluent (B1a) and a water insoluble, or slightly water-soluble reactive oligomer (B2); and (C) optionally a photoinitiator (C), wherein the amount of component (B1b) and (A2) is greater than 40% by weight, especially 50% by weight based on the amount of components (A2), (B1a), (B1b) and (B2) and the amount of components (B1a), (B1b) and (B2) is greater than 10% by weight, especially 20% by weight based on the amount of components (A2), (B1a), (B1b) and (B2). The radiation curable compositions can be cleaned by pure water with no assistance of any solvent or detergent. The printed three-dimensional products have clean, smooth, tack-free surface after washing with water and sufficient post-curing. The fully cured three-dimensional products are high-temperature resistant and have excellent mechanical performance above glass transition temperature, e.g. 200° C.

The present invention relates to radiation curable compositions, comprising (A1) at least one water-soluble reactive diluent (A1); (A2) at least one water-soluble reactive oligomer (A2); (B) at least one reactive component selected from the group consisting of a water insoluble reactive diluent (B1a), a slightly water-soluble reactive diluent (B1b) and a water insoluble, or slightly water-soluble reactive oligomer (B2); and (C) optionally a photoinitiator (C), wherein the amount of component (A1) and (A2) is greater than 20% by weight, especially 30% by weight based on the amount of components (A1), (A2), (B1a), (B1b) and (B2) and the amount of components (B1a), (B1b) and (B2) is greater than 10% by weight, especially 20% by weight based on the amount of components (A1), (A2), (B1a), (B1b) and (B2); radiation curable composition, comprising (A1′) at least one slightly water-soluble reactive diluent (B1b); (A2) at least one water-soluble reactive oligomer (A2); (B) at least one reactive component selected from the group consisting of a water insoluble reactive diluent (B1a) and a water insoluble, or slightly water-soluble reactive oligomer (B2); and (C) optionally a photoinitiator (C), wherein the amount of component (B1b) and (A2) is greater than 40% by weight, especially 50% by weight based on the amount of components (A2), (B1a), (B1b) and (B2) and the amount of components (B1a), (B1b) and (B2) is greater than 10% by weight, especially 20% by weight based on the amount of components (A2), (B1a), (B1b) and (B2). The radiation curable compositions can be cleaned by pure water with no assistance of any solvent or detergent. The printed three-dimensional products have clean, smooth, tack-free surface after washing with water and sufficient post-curing. The fully cured three-dimensional products are high-temperature resistant and have excellent mechanical performance above glass transition temperature, e.g. 200° C.

In the embodiments of the present disclosure, additive manufacturing devices and methods are provided. The additive manufacturing device includes a light source, a building device, and a light scattering member. The light source is configured to provide light to cure photocurable resins. The building device includes a resin tank configured to store the photocurable resins. The building device has a building surface on which the photocurable resins are cured. The light scattering member is arranged between the light source and the building surface. The light scattering member is configured to alter a light propagation direction of the light from the light source to cause an inner-pixel light intensity change on the building surface.

The present invention relates to poly(aryl ether) polymers which can for example be used in lithographic processes for the photofabrication of three-dimensional (3D) articles. The invention further relates to compositions including these poly(aryl ether) polymers. Still further, the invention relates to lithographic methods to form 3D articles or objects that incorporate the aforementioned polymer compositions.

The present invention relates to poly(aryl ether) polymers which can for example be used in lithographic processes for the photofabrication of three-dimensional (3D) articles. The invention further relates to compositions including these poly(aryl ether) polymers. Still further, the invention relates to lithographic methods to form 3D articles or objects that incorporate the aforementioned polymer compositions.

Disclosed are light-curing printer display devices, 3-dimensional (3D) printers, control methods and devices, and electronic devices. In some embodiments, the light-curing printer display device include a screen, a light source assembly, a shielding plate, and a controller. In other embodiments, the light source assembly is arranged on a back side of the screen and the light source assembly includes multiple Light Emitting Diode (LED) light sources independent of each other. The shielding plate is arranged between the screen and the light source assembly and is provided with multiple light holes with the same number as that of the multiple LED light sources. The multiple light holes correspond to the multiple LED light sources one by one. The controller is electrically connected with the multiple LED light sources and is configured to control at least one LED light source to emit light.

A 3D printer includes: a tank containing a photocurable resin; a spatial light modulator disposed under the tank and selectively delivering light to a specific region of the photocurable resin, the spatial light modulator including a light source; a positioning stage disposed under the spatial light modulator and moving the spatial light modulator along multiple axes; and a controller controlling the spatial light modulator and the positioning stage, wherein the controller controls the spatial light modulator and the positioning stage such that the spatial light modulator is moved along a specific path and regions of the photocurable resin illuminated with the light partially overlap one another to allow a cumulatively illuminated region to be cured.

A method of making a workpiece in an additive manufacturing process includes determining a preferred angular orientation of the grid array about a build axis extending perpendicular to a layer to be built for a first layer of a workpiece. The preferred angular orientation is selected to align an edge of one or more pixels with an edge of the layer of the workpiece being built. The method further includes orienting a patterned image of radiant energy to the preferred angular orientation by rotating a projector before solidifying a portion of a resin that forms the first layer of the workpiece.

A method of making a workpiece in an additive manufacturing process includes determining a preferred angular orientation of the grid array about a build axis extending perpendicular to a layer to be built for a first layer of a workpiece. The preferred angular orientation is selected to align an edge of one or more pixels with an edge of the layer of the workpiece being built. The method further includes orienting a patterned image of radiant energy to the preferred angular orientation by rotating a projector before solidifying a portion of a resin that forms the first layer of the workpiece.

A method of printing one or more three-dimensional objects comprises: providing a volume of a photopolymerizable liquid in a closed container including an entry port and an exit port, the entry port and the exit port being connected by a channel therebetween, the container including at least one printing zone comprising at least an optically transparent window to facilitate irradiating excitation light at a first wavelength into a printing zone through the at least an optically transparent window, wherein the photopolymerizable liquid displays non-Newtonian rheological behavior such that the object formed in the photopolymerizable liquid within the printing zone remains at a fixed position or is minimally displaced in the unpolymerized photopolymerizable liquid during formation, directing the excitation light through the at least an optically transparent window into the printing zone to selectively photopolymerize the photopolymerizable liquid in the printing zone without support structures to form a printed object, wherein the printed object remains at a fixed position or is minimally displaced in the unpolymerized photopolymerizable liquid during formation, and applying pressure to the contents of the closed container and/or pumping additional photopolymerizable liquid into the closed container through the entry port to at least transport the printed object out of the printing zone toward the exit port, thereby discharging at least a portion of contents of the closed container out of the closed container through the exit port. Systems for printing one or more three-dimensional objects are also disclosed.