The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light-activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.

An example of a multi-fluid kit for three-dimensional (3D) printing kit includes a fusing agent and a build material reactive functional agent. The fusing agent includes water and an electromagnetic radiation absorber. The build material reactive functional agent includes a vehicle and trifluoroacetic anhydride. The multi-fluid kit may also be part of a 3D printing kit.

Provided is an apparatus for post-processing an additively manufactured polymer part, comprising a reservoir (402) for containing a liquid solvent; a processing chamber (408) in controllable fluid communication with the reservoir; and a controller (418) configured to controllably post-process an additively manufactured polymer part located in the processing chamber by the solvent responsive to at least one parameter associated with the part. A method for post-processing an additively manufactured polymer part is also provided.

A method for sterile packaging of a surface modified implantable device includes irradiating a surface of the device such that the hydrophobicity of the surface is decreased and, optionally, the device is simultaneously sterilized. The surface of the sterile, surface-modified implantable device is then covered in a polar solution to prevent hydrophobic recovery of the surface.

A photosensitive resin composition for cell culture substrates that enables the low-cost manufacture of a cell culture substrate, that can easily form patterns of various shapes when providing a pattern on the surface of a cell culture substrate, has low cytotoxicity, and that can form a cell culture substrate; a cell culture substrate that is formed using the photosensitive resin composition; and a cell culture substrate manufacturing method that uses the photosensitive resin composition. The photosensitive resin composition includes a photopolymerizable monomer and a photopolymerization initiator. The photopolymerizable monomer contains a defined amount of a polyfunctional monomer that is at least trifunctional, and the content of the photopolymerization initiator is within a prescribed range.

A method of manufacturing a three-dimensional object facilitates the removal of support material from the object. The method includes moving the object to a position opposite a microwave radiator and operating the microwave radiator to change the phase of the support material from solid to liquid. A controller either monitors the expiration of a predetermined time period or a temperature of the object to determine when the microwave radiator operation is terminated. The microwave radiation does not damage the object because the support material has a dielectric loss factor that is greater than the dielectric loss factor of the object.

A method of manufacturing a three-dimensional object is disclosed. The method includes operating a first ejector of a three-dimensional object printer to eject a first material towards a platen to form an object. The method further includes operating a second ejector of the three-dimensional object printer to eject a second material towards the platen to form support for portions of the object, the support being configured to provide support for portions of the object during the operation of the first ejector to form the object, at least one portion of the support having a body with at least one fluid path that connects at least one opening in the body to at least one other opening in the body. The method further includes connecting a fluid source to the at least one fluid path of the support to enable fluid to flow through the at least one fluid path to remove at least an inner portion the support from the object.

A flexible pipe body and methods of producing a flexible pipe body are disclosed. The method may include providing a tubular length of polymeric material for forming a polymeric layer of flexible pipe body; providing a strength layer radially outwards of the polymeric layer; and treating the polymeric layer with a non-ambient temperature and pressure.

In a method for manufacturing a polyolefin microporous film, non-uniformity in a film resulting from non-uniform drying during solvent extraction is minimized, high-speed drying and high-speed continuous productivity of the polyolefin microporous film are implemented. In the method for manufacturing a polyolefin microporous film, in which a composition composed of a polyolefin resin and a plasticizer is made into a film form using extrusion, the plasticizer is extracted and removed using a solvent, and the film is thereafter dried. After the foregoing extraction and before the drying, the film is brought into close contact with a roll, or its width is mechanically restrained. A liquid (heating medium) having a temperature greater than or equal to the boiling point of the solvent is made to contact the film while the film is in close contact with the roll or while the width is restrained, whereby the film is heated and dried.

Methods of making polymeric devices, such as stents, with one or more modifications such as addition of plasticizers, to improve processing, and the devices made by these methods.