40 results about "Photopolymer" patented technology

This invention provides a photosensitive conductive resin composition and its application. The photosensitive conductive resin composition comprises, by weight, the following components: 20-60 parts of a photosensitive polymer, 10-20 parts of an epoxy resin, 5-20 parts of an acrylate monomer, 0.5-5 parts of a photoinitiator, 20-60 parts of a conductive carbon filler, and 1-10 parts of an additive; the volume resistivity of the conductive carbon filler is ≤0.5 Ω·m. Through the screening and synergistic compounding of specific components, the photosensitive conductive film prepared from this resin composition exhibits excellent conductivity and peel strength, high photosensitivity resolution, and excellent developability, thus meeting the application requirements of photosensitive conductive films.

This invention relates to the technical field of photopolymer additive manufacturing, and specifically to a control system and method for continuous photopolymerization of multi-material composites. The system includes a control unit, a projection unit, and a composite molding execution unit. Since the composite molding execution unit is positioned above the projection unit, the Z-axis lifting module is perpendicular to the projection unit, and the X-axis translation module is connected to the Z-axis lifting module. This achieves physical isolation between the dual independent optomechanics and the material tank, continuous molding of functionally graded materials through dynamic parameters and multi-mode scheduling, and cross-tank collaborative control and interface strengthening treatment. The control method for continuous photopolymerization of multi-material composites of this invention, by achieving continuous printing of two materials through time-driven cross-tank collaborative control, improves the interfacial bonding strength of heterogeneous materials and increases printing speed, thereby solving the problems of poor multi-material compatibility, low switching efficiency, and low interfacial bonding strength.

A pane with thermal stabilization of at least one hologram element, includes at least one glass pane with an outer surface and an interior-side surface, at least one hologram element arranged on the outer surface or the interior-side surface of the at least one glass pane, wherein the at least one hologram element includes a photopolymer, and at least two temperature stabilization elements, wherein the at least two temperature stabilization elements are configured to stabilize the temperature of the at least one hologram element to a target temperature.

This invention provides a photopolymer composition, a holographic film, and a volume holographic grating. The photopolymer composition of this invention comprises a polymer matrix, a photopolymerizable monomer, and a photoinitiator; the polymer matrix comprises linear polyurethane, and the photopolymerizable monomer comprises a compound represented by Formula I. By using linear polyurethane as the polyurethane matrix and a compound represented by Formula I as the photopolymerizable monomer, the photopolymer composition of this invention possesses high refractive index modulation capability and low viscosity, enabling the formation of a holographic film with uniform material distribution, thereby achieving high diffraction efficiency in the volume holographic grating.

A method for producing and recycling a crosslinked photopolymer is disclosed. The method includes mixing reactive thiols, multifunctional alkenes, and a photoinitiator to create a homogeneous mixture that is crosslinked through exposure to light. The method also includes decrosslinking the crosslinked photopolymer through base-catalyzed thiol-disulfide exchange reactions by mixing the crosslinked photopolymer with a reactive thiol, a base catalyst, and a solvent to create a decrosslinked material including recycled thiol oligomers which are reactive. The method further includes removing the base catalyst and the solvent and recrosslinking the recycled thiol oligomers by mixing stoichiometric amounts of the recycled thiol oligomers and a reactive alkene such that a molar ratio between thiol end groups and ene end groups is maintained at 1:1. The method includes adding a photoinitiator and mixing to create a homogeneous mixture, and recrosslinking the homogeneous mixture through exposure to light. The recrosslinked photopolymer includes dynamic disulfide bonds.

A polymer composition is disclosed comprising, based on the total weight of the composition: (A) 65-90% by weight of an aromatic polycarbonate, (B) 5-25% by weight of an additive composition comprising titanium dioxide (B1) and at least one second component (B2) selected from zinc sulfide, zinc oxide, calcium carbonate and barium sulfate, wherein the weight ratio of B1 to B2 is 95:5-40:60, (C) 0.0001-0.1% by weight of carbon black, and (D) 1-10% by weight of other components, wherein the total amount of (A) to (D) is 100% by weight.

This utility model relates to the field of photopolymer 3D printing technology, and more particularly to a resin recovery device for a photopolymer 3D printing equipment, comprising: a worktable, a frame, a recovery component, a central assembly, and a multifunctional assembly; the central assembly is connected to the recovery component; a collection box is connected to the recovery component via a splicing frame, one side of the splicing frame is connected to a support plate, the support plate is connected to a base plate, the base plate is connected to a motor b, the motor b drives a rotating shaft, the rotating shaft is connected to a gear b, and the base plate is connected to a moving groove; the multifunctional assembly includes a moving cover; the moving cover is connected to a fixed plate, and the fixed plate is connected to a rack b. This utility model prevents dust from entering the collection box and affecting resin recovery, prevents oxygen and moisture in the air from contacting the recovered resin, facilitates the slowing down of resin oxidation and moisture absorption processes, and uses opaque materials for the collection box and the moving cover to prevent light sources in the working environment from triggering a curing reaction in the resin recovery process, which could lead to resin thickening, clumping, or even complete curing, thus conveniently improving the quality of resin recovery.

This invention belongs to the field of photopolymer additive manufacturing technology, and discloses a programmable photopolymer additive manufacturing apparatus and method based on induced orientation by scraping. The apparatus includes a motion platform, a material tank, a printing platform, and a rotating platform; a scraper, disposed on the rotating platform, is used to scrape the printing material; and a curing component is used to cure the printing material. The method includes the following steps: laying a layer of printing material to be cured on the printing platform; scraping the printing material according to a preset direction using the scraper, and the applied shear force induces an orientation structure within the printing material; curing the printing material with the orientation structure; and laying the printing material layer by layer and repeating the scraping and curing steps to form a printed part. This invention achieves in-situ, programmable control of the microscopic orientation of the material during the printing process, improves the freedom of structural design, and provides a manufacturing method with high process integration and flexibility for preparing three-dimensional components.

This utility model relates to the technical field of photopolymer 3D printer components, and discloses a heating material tank for a photopolymer 3D printer, including a material tank body and a movable base. A front limiting groove is formed on the upper front side of the interior of the material tank body, and a rear limiting groove is formed on the upper rear side of the interior of the material tank body. A threaded rod is rotatably installed inside the front limiting groove, and a guide rod is fixed inside the rear limiting groove. A servo motor for driving the threaded rod is provided on the upper right side of the material tank body, and the output end of the servo motor is connected to the threaded rod. A front limiting slider is fixed at the bottom front of the movable base, inserted into the front limiting groove and threadedly connected to the threaded rod. This facilitates better circulation and heating of the resin inside the material tank body, resulting in faster and more uniform heating of the resin inside the material tank body, and increased work efficiency.

This utility model relates to the field of 3D printers, specifically to a base structure for an LCD photopolymerization 3D printer. It includes a material tank, which is a through-frame structure with a pressing frame fixedly connected to its lower surface. The pressing frame presses and fixes a release film to the bottom surface of the material tank. A base, which is a through-platform structure, has a mounting platform on its top surface for mounting an LCD screen. An annular groove A surrounds the mounting platform on the base, the size of which matches the lower structure of the pressing frame. A through-hole is provided on the mounting platform for the LCD screen's ribbon cable to pass through. When the material tank is installed on the base, the release film adheres to the LCD screen and covers the mounting platform. The release film is an oxygen-permeable membrane. This utility model allows oxygen to pass through the breathable release film because of the resin's oxygen-inhibiting properties, preventing a single ultra-thin layer of liquid resin from curing.

This application provides an exposure control method, device, and storage medium for a photopolymer 3D printing device, relating to the field of 3D printing. The photopolymer 3D printing device includes a printing platform, a material tank, and a light source module. The light source module emits curing light to cure the material to be cured in the material tank and connect it to the printing platform. The method includes: controlling the printing platform to move to a preset printing position and keeping the light source module in an off state; acquiring a first detection value characterizing the flow rate of the material to be cured in the material tank; and controlling the light source module to turn on exposure when the first detection value is within a preset detection value range. In this embodiment, the user does not need to set the off time of the light source module; instead, based on the detection value characterizing the flow rate of the material to be cured in the material tank, the off time is automatically and accurately determined, achieving accurate exposure of the light source module and improving printing efficiency and printing effect.

A dual-layer optical encryption fluorescent polymer waveguide chip based on optical pulse code modulation technology belongs to the field of functional photonic chip technology. It consists of a substrate layer, a buffer layer, a cladding layer, a bottom waveguide layer, and a top waveguide layer. The cladding layer is divided into three parts: a lower cladding layer, a middle cladding layer, and an upper cladding layer. The bottom waveguide is located within the middle cladding layer, and the top waveguide is located within the upper cladding layer. The bottom and top waveguides do not overlap in the chip's top-view plane. The waveguide layer material is obtained by doping fluorescent small-molecule oligomer chromophores into a polymer material. This invention achieves signal optical pulse coding by modulating the pump light power intensity. By detecting changes in optical transmission loss in the fiber optic system, it determines whether eavesdropping has occurred. Eavesdropping is indicated by optical transmission loss exceeding a threshold. False information is displayed in the bottom waveguide for disguise, while the modulated information is transmitted encrypted through the top waveguide, thus solving the problems of limited controllability and insufficient security in traditional encryption technologies.

A process for manufacture of a flexographic printing plate pursuant to a plurality of process steps, including at least an imaging step, a curing step, a washing or other non-cured-polymer-removal step, each step performed by a processing machine having at least one variable operating parameter. The process includes providing a smart plate tracking (SPT) code on each flexographic printing plate, storing in computer memory instructions readable by a computer processor information corresponding to the at least one variable operating parameter for each of the processing machines in association with the SPT code, and in response to receiving the SPT code as an input from a user or machine interface corresponding to one of the processing machines, the computer processor returning instructions corresponding to one of the processing machines.

This invention discloses a filter for casting single-crystal blades, its preparation method, and its application. The filter includes a main body with a threaded structure. The main body includes a first filter structure and a second filter structure arranged sequentially from top to bottom. The pore size of the first filter structure is larger than that of the second filter structure. The filter is formed by photopolymer ceramic 3D printing, and the printing material is alumina or zirconium oxide with a solid content greater than 50%. The printed filter is laid flat in the air for calcination. The filter is used for casting single-crystal blades and is installed on the casting mold shell of the single-crystal blade. This invention uses a graded, threaded filter printed by photopolymer ceramic 3D printing, which is screwed into the casting mold shell to prevent the filter from floating during the alloy liquid casting process. It is easy to operate and avoids the inclusions that may be introduced during the filter installation process, ensuring the purification effect of the alloy liquid during the casting of single-crystal blades and significantly reducing the scrap rate of aerospace single-crystal blades due to metallurgical inclusions.

The prosthetic screw is for securing dental or bone-implant prosthetics to anchors, such as multi-unit abutments (MUAs). The screw includes a body with a threaded bottom portion for attachment, a head portion at the top for tool engagement, and a midsection with a curved transition profile. This curved profile eliminates right angles, evenly distributes vertical clamping forces, and reduces stress on the prosthetic, enhancing durability. The design accommodates prosthetics made from materials such as zirconia, PMMA, 3D printable photopolymer resin, and titanium, with thread sizes including M1.4, M1.6, and M1.72. The head's larger diameter facilitates secure attachment and stress management. The screw ensures reliable attachment, stress moderation, and extended functionality in dental and bone-implant systems.

The present application discloses a photopolymer-based holographic recording medium, a volume holographic grating and a preparation method therefor, and a holographic device. The photopolymer-based holographic recording medium at least comprises a compound having a plurality of isocyanate reactive functional groups and a polyisocyanate-based compound, wherein the number of the isocyanate reactive functional groups is different from the number of isocyanate groups. The volume holographic grating prepared in the present application has a relatively high refractive index modulation for red, green and blue light.

The present disclosure relates to a photopolymer film comprising a substrate film and a recording layer, and having a maximum reduction rate of a predetermined band area in a graph derived from the results of photothermal infrared (PTIR) spectroscopic analysis in a thickness direction from one surface of the recording layer, a composition for forming such photopolymer film, a holographic recording medium and an optical element comprising the same.

This utility model relates to the field of 3D printing technology, and particularly to a laser power detection device and a laser module for a photopolymer 3D printer. The laser power detection device includes a mounting base, an electrical integration box, a drive assembly, and a detection assembly. The mounting base has an L-shaped structure with several oblong holes. The electrical integration box is fixedly connected to a vertical plate. The drive assembly is a pen-shaped cylinder used to control the horizontal displacement of the detection assembly. The detection assembly includes a housing, a lens, and a detector, with the lens and detector coaxially assembled in a detection hole on the housing. Furthermore, the laser power detection device also includes a counterweight and a rotating assembly for rotating the detection assembly around an axis. This laser power detection device overcomes the limitations of fixed installation in existing laser power detection devices, enabling flexible detection and real-time online monitoring of laser power. When applied to laser modules for photopolymer 3D printers, it improves the performance and reliability of photopolymer 3D printing technology.

An additive manufacturing technique uses digital mask-based illumination and a polar-based build environment for increased throughput. In one embodiment, the build environment comprises a rotating element having a surface. A coater is configured to deposit photopolymer material on the rotating element at a given flow rate. As the element rotates and the coater deposits the photopolymer material, a radiation source of an image scanning system projects an array of point sources (an image) onto the photopolymer material for an exposure time to cure a given layer. As the photopolymer material is deposited layer-upon-layer, and for each layer, a control system adjusts a relative position of the coater with respect to the surface, adjusts a speed of rotation of the rotating element, and maintains the flow rate and the exposure time constant.

The present disclosure relates to a photopolymer composition, a hologram recording medium, a preparation method thereof, and an optical element comprising the same. The photopolymer composition is able to provide a hologram recording medium and an optical element comprising the same, which exhibit not only excellent optical recording characteristics but also outstanding reliability and transparency even under high temperatures.

A 3D printing system includes a tank containing a liquid photopolymer resin. A textured surface is fixedly disposed in the tank and through which light is configured to pass into the liquid photopolymer resin. A layer of an inert material is directly disposed between the textured surface and the liquid photopolymer resin. The layer of the inert material is disposed directly on the textured surface. The light is configured to pass through the layer of the inert material into the liquid photopolymer resin. The layer of the inert material is substantially immiscible and non-reactive with the liquid photopolymer resin. A refractive index of the inert material is approximately equal to a refractive index of the textured surface to minimize diffraction of the light passing through the textured surface.

This utility model relates to the technical field of photopolymer 3D printing equipment, and particularly to a photopolymer 3D printer. The device includes a base, a material tank, a light path module, a lifting platform, a forming module, and a quick-release fixing assembly. The light path module is embedded inside the base, with its exposure surface facing upwards and lower than the top surface of the base; the material tank is located above the base, with its bottom corresponding to the exposure surface of the light path module; the lifting platform is installed above the base, and the quick-release fixing assembly connects the forming module and the lifting platform. The surface of the forming module near the material tank has several recessed grooves extending in a direction perpendicular to the plane of the forming module. The cross-sectional profile of these grooves is composed of a first sidewall, an arc-shaped bottom wall, and a second sidewall that are smoothly connected sequentially. The first and second sidewalls are symmetrically distributed, and the arc-shaped bottom wall is a circular arc structure protruding away from the outer surface of the forming module. This structure improves model adhesion and facilitates model peeling, thereby improving printing stability and efficiency.

The application discloses a red light photosensitive initiation system, a photopolymer type holographic recording medium, a holographic optical element and a display device. The photopolymer type holographic recording medium comprises a film-forming resin, a writing monomer, a red light photosensitive initiation system, a chain transfer agent, a catalyst and an additive. The film-forming resin comprises a compound with multiple isocyanate reactive functional groups and a polyisocyanate-based compound. The red light photosensitive initiation system comprises a red light photosensitive dye and a co-initiator. In this way, the monomer can be efficiently initiated to polymerize, the dye can be quickly photobleached under irradiation of a corresponding wavelength, the material cost is low, and the holographic recording performance of the photopolymer is effectively improved.

This utility model discloses a detachable forming platform for a photopolymer 3D printer, relating to the field of 3D printing technology. A lifting electric slide rail is symmetrically embedded at one end of a fixed processing box. A lifting operation plate is mounted on one end of the lifting electric slide rail via a slide rail seat. Several lifting electric push rods are equidistantly installed at the bottom of the lifting operation plate. A universal joint is installed at the bottom of each lifting electric push rod, and a fixed locking frame is welded to the bottom of the universal joint. A symmetrical insertion connecting strip is inserted into one end of the fixed locking frame, and a forming fixing platform is welded to the bottom of two insertion connecting strips. This utility model utilizes direct insertion and pressing connections to achieve rapid disassembly and replacement of the platform. This allows for quick operation by directly replacing the platform when the product needs to be retrieved, avoiding internal size limitations of the printing equipment, reducing the risk of product tilting and damage due to misalignment during handling, and enabling rapid platform maintenance. It also ensures stable and continuous printing, guaranteeing the speed and stability of printing production.

The utility model discloses a 3D printing waste light solidification plastics photolysis removes initiator device outer cylinder, central light source, guide cylinder, lower blow pipe, upper blow pipe, filter component, the central light source sets up at the outer cylinder central place, including light source cylinder, a plurality of light source fluorescent tube, the reflection piece, is provided with the guide cylinder between light source cylinder outside and the outer cylinder inner wall, and lower blow pipe passes through the outer cylinder and is set up in the guide cylinder lower part of guide cylinder, lower blow pipe includes the gas pipe section, annular distribution pipe the utility model provides a kind of 3D printing waste light solidification plastics photolysis removes initiator device for the waste light solidification plastics particle after crushing processing, realizes the agitation to granular material using air floatation mode, cooperate central light source to realize its photolysis operation. Through the optimization of the internal guide cylinder combined to blow gas device, the cyclic agitation of granular material can be realized. Central light source uses multiple fluorescent tubes, cooperate reflection piece, while maintaining the light intensity in subsequent use process.

FIELD: dentistry.SUBSTANCE: intended for practicing manual endodontic treatment skills in students to improve the effectiveness of treating diseases of the periapical tissues of teeth. A phantom simulation model of a tooth with external root resorption is used, which includes a 3D-printed model of a tooth with a root canal having a hemispherical expansion at the root apex. In this case, the phantom simulation model of the tooth is made of transparent or radiopaque photopolymer resin, has a length of 30 mm with a red-colored canal system of 15 mm in length. In this case, the transparent model of the affected tooth is intended for the initial level of manual skill, and the opaque radiopaque model of the affected tooth is intended for the process of training in endodontic root canal treatment, where quality control of treatment and filling of root canals is possible only by radiographic method. In this case, the root apex has a size of No. 80 according to ISO, and the hemispherical expansion at the root apex of the tooth model, simulating a chronic lesion of the periapical tissues of the tooth, has a diameter of 8 mm. In this case, using Blue Sky Bio software, a three-dimensional image of the affected tooth is extracted from the patient's cone-beam computed tomography (CBCT) scan in DICOM format, then, using artificial intelligence algorithms in Blender software, the model is corrected, virtually modeling a tooth with a root cyst and external resorption. After this, the model is imported into STL format, 1.9 ml of resin is collected for subsequent slicing and 3D printing, and the walls of the root canal system of the resulting model are painted red with Funtodo photopolymer resin.EFFECT: inventions, by simulating endodontic treatment training conditions that are as close as possible to real conditions, namely, an apical plug in the area of the wide apex of a tooth root during inflammatory external resorption or after apical resection, allow for the practice of existing variations of endodontic treatment, and also minimize the time costs for model production.3 cl, 14 dwg, 1 ex

This invention belongs to the field of additive manufacturing technology for ceramic biomimetic materials, and provides a method for preparing ceramic biomimetic structural composite materials by photopolymerization additive manufacturing. This method utilizes a layer-by-layer scanning strategy and parameterized control of the gaps and interlayer overlaps of the curing units to construct a three-dimensional interconnected porous structure with gradient, periodic, or biomimetic morphology during the forming stage. Optimized ultrasonic cleaning and staged precise degreasing processes ensure the integrity of the preform. The composite material is then achieved through melt infiltration, impregnation, or sol-gel processes. This invention solves the technical problems in existing photopolymerization manufacturing, such as the difficulty in accurately constructing biomimetic multi-level structures, uneven interfacial bonding of composite materials, and easy deformation of the preform during heat treatment. It is suitable for preparing high-performance composite materials such as bamboo-inspired gradient structures and shell-inspired periodic structures, and has significant application value in fields such as biomedical implants.

This utility model discloses a quick-release structure for photopolymer 3D printed parts and a photopolymer 3D printing device, including a molding substrate for supporting the printed parts and a rotatable disassembly plate assembled on the molding substrate. The disassembly plate has a plurality of grids arranged in parallel at intervals. The side of the molding substrate facing the resin cylinder has a plurality of clearance grooves that match the grids and are arranged in parallel. The grids are detachably inserted into the clearance grooves. When removing the part, the disassembly plate rotates relative to the molding substrate so that part of the grids protrudes out of the clearance grooves and pushes out the printed part on the molding substrate. This eliminates the need to remove the molding substrate and connector assembly and use the scraper, and also reduces the probability of damage to the printed parts and injury to the operator caused by improper cutting position.

This invention discloses a synchronous additive and subtractive manufacturing device based on orthogonal light fields, relating to the field of photopolymer additive manufacturing technology. The device includes: a printing container; a forming platform; a dual-wavelength orthogonal light generation unit; a light field coordination unit; and a control unit. This synchronous additive and subtractive manufacturing device uses the dual-wavelength orthogonal light generation unit and the light field coordination unit to couple the initiating light and suppressing light into a composite light field with synchronous action. This, combined with the control unit, enables synchronous execution of additive curing in the target area and subtractive suppression in the non-target area. It is adaptable to various photopolymer additive manufacturing processes such as DLP, SLA, and CAL. Relying on precise optical path adjustment, beam calibration, phase delay compensation, and refractive index matching correction, it effectively eliminates over-curing, contour distortion, and porosity defects caused by light scattering, significantly improving forming accuracy and surface quality. Simultaneously, it achieves integrated synchronous additive and subtractive manufacturing, simplifying processing steps and avoiding secondary positioning errors.