1860 results about "Light curing" patented technology

The invention provides a ceramic slurry preparation and 3D (three dimensional) printing light curing molding method. 25-85vol% of ceramic powder and 15-75vol% of an optical resin premix solution are mainly involved, and the method includes: A), preparation of the optical resin premix : namely stirring a low polymer, a reactive diluent, a photoinitiator, a dispersing agent, a photosensitizer and a sensitizer according to a certain proportion under intermediate speed for 0.5-3 hours to enable the components to be mixed evenly; B), placing the premix solution and the ceramic powder in a ball mill according to certain volume for ball-milling for 5-15 hours to prepare the ceramic slurry high in solid content and low in viscosity; subjecting the ceramic slurry to curing molding layer by layer gradually on a 3D light curing molding machine to obtain a ceramic green body prior to aftertreatment of drying, degreasing, sintering and the like to obtain ceramic part. The method is high in preparation molding precision and free of molds to prepare complex structure parts, the ceramic product can reach more than 92% in density, 320-1750MPa in flexural strength and 1800-4500MPa in compression strength.

A process for manufacturing an ammunition article, including: (a) providing a cartridge including a projectile disposed in a casing and presenting a joint between the projectile and the casing; (b) applying to the joint a sealingly effective amount of a light-curable sealant composition; and (c) exposing the applied sealant composition to curingly effective light. The resulting ammunition article is sealed at the projectile/casing joint against moisture incursion, and such article is amenable to high-speed, high-volume production by the method of the invention.

The invention relates to an ultraviolet light curing anti fogging coating composite with fine anti fogging effect and a preparing method thereof. The ultraviolet light curing coating composite comprises hydrophilic activated oligomer, hydrophobic light curing resin, hydrophilic polymeric monomers, hydrophobic activated diluent, photoinitiator and additive. The method comprises the following steps: accurately weighting and placing the hydrophilic activated oligomer and the hydrophobic light curing resin into a container, adding the hydrophilic polymeric monomers, the activated diluent and the additive in turn to mix for 10min, and then adding the photoinitiator, mixing for 5min to obtain the composite in the invention which is preserved in dark place. The ultraviolet light curing anti fogging coating composite provided by the invention can be coated on thermal sensitivity plastic base material such as PC, PMMA, PET and the like; the coating after the ultraviolet light curing has fine hydrophily and physical performance. The invention has fine anti fogging and fog inhibiting effect, and the coating has good adhesive force and water resistance which can ensure the durability of the anti fogging performance.

The invention provides a graphene oxide / light cured resin composite and its preparation method and application, the graphene oxide / light cured resin composite comprises two phases of graphene oxide and light cured resin, the graphene oxide is evenly dispersed in the light curing resin, the content of the graphene oxide is 0.1-1wt%, and the light cured resin comprises an oligomer, a light initiator and an active diluent. A graphene oxide nano material is dispersed in the light curing resin to obtain the graphene oxide / light cured resin nano composite, elongation at break and maximum bending strain of ordinary light cured resin is improved to a certain extent, and the impact strength of a coating film is increased by 2 times, so that a part printed by a 3D printer has better mechanical property.

A semiconductor radiation source has a base body on which at least two LED chips are directly mounted and are fitted to the base body using a thermally conductive connection. At least one printed circuit board is mounted on the base body and extends from the centrally arranged LED chips to the outside, in particular to the peripheral region of the base body, and projects, in particular, into free areas which extend laterally beside the chips or between the latter.

The invention relates to a photo-cured nanometer composite material which consists of 0 to 64 weight percent of film forming substance, 1 to 60 weight percent of inorganic nanometer particles, 1 to 56 weight percent of active thinner, 1 to 9.3 weight percent of evocating agent, 0 to 8 weight percent of coating additive and 0 to 31 weight percent of solvent. The manufacturing method comprises the following steps: (1) the prepared photo-cured nanometer composite material is counted by 100 weight percent; according to the proportion, each composition is weighed; (2) through a sol-gel method, a mechanical dispersion method or the combination of two methods, the inorganic nanometer particles are introduced to the active thinner to obtain a mixed master material; and (3) the mixed master material, an oligomer, the evocating agent, the coating additive and the solvent are mixed and evenly stirred to prepare the photocuring nanometer composite material. The photocuring nanometer composite material has the characteristics of high content of nanometer particles, good levelling performance, high transparency, good lustrousness, high adhesive force with a polymer substrate, high rigidity, scratching resistance, ultraviolet resistance and the like.

The invention relates to an ultraviolet curable ink and a preparation method thereof. The ink comprises 30-60% of light sensitive resins, 15-45% of active monomers, 1-10% of ultraviolet light initiators, 10-20% of pigments and 0.5-2% of auxiliaries by mass and is an ink which is transformed from liquid state to solid state to be cured after binders in the ink are cross-linked under the irradiation of ultraviolet lights with certain wavelengths. The ultraviolet curable ink provided by the invention has the advantages of short light curing time, no need of heating, conservation in energy consumption, no volatile organic solvent VOC (Volatile Organic Compounds) in the ink, no pollution to the atmosphere, smaller effect of temperature variation on system viscosity, high solid content, suitability for multiple production methods and production requirements and excellent comprehensive properties, can be machined and used within a wider temperature range; and very good printing effects of the ultraviolet curable ink on both a hard substrate and a soft substrate can be obtained.

The present invention is directed to root canal obturation in a tooth. In one embodiment, a plug is positioned in a root canal and bonded to the root canal by applying a light-curing adhesive to the canal and exposing the plug to a light source to bond the plug to the root canal. In another embodiment, a carrier is disclosed having an optically transmissive plug portion for insertion into the canal. In still another embodiment, the plug portion of the carrier includes an optical fiber to transmit light from a light source into the plug portion. In still yet another embodiment, a filler material is heated and injected into the root canal in a semi-liquid state and exposed to light to cure the adhesive.

The invention provides a UV-cured peelable blue gel for temporary protection of a touch screen and a preparation method thereof. The UV-cured peelable blue gel comprises the following components of 50-70 parts of modified acrylate resin, 20-30 parts of acrylate monomer, 1.0-5.0 parts of light curing agent, 0.1-1.0 part of thixotropic agent, 0.1-5.0 parts of auxiliary and 0.1-1.0 part of pigment; and the preparation method comprises the following steps of: accurately weighing various raw materials according to a formula ratio; firstly adding the modified acrylate resin, the acrylate monomer, the light curing agent, the auxiliary and the pigment to a reaction kettle in sequence and then stirring these materials in the reaction kettle; after these materials are uniformly stirred, adding the thixotropic agent to these materials; and uniformly dispersing an obtained mixture to discharge out a material. The UV-cured peelable blue gel provided by the invention is a non-solvent and a system containing no phthalate substance and is much safer and more environment-friendly. Through the adoption of a UV curing system, the film curing and forming speed is high and the production efficiency of the touch screen is greatly increased.

Ink jet printing is provided on large area substrates such as wide width textile webs. The printheads are driven by linear servo motors (633) across a bridge (630) that extends across the substrate. The timing of the jetting of the ink is coordinated with the motion of the printheads (640,641), so that the heads can be rapidly moved and the ink can be jetted while the printheads are accelerating or decelerating as they move on the bridge. Preferably, ultraviolet (UV) light curable ink is jetted and first partially cured with UV light (645,646) and then subjected to heating to more completely reduce uncured monomers of the ink on the substrate. Preferably, the heat is applied by contacting the substrate with a heated plate (661,662). Ink jet printing is provided using ultraviolet (UV) light curable or other curable composition or stable or other printable substance. In certain embodiments the UV ink has a dye-component therein. The ink is jetted onto a substrate, the composition is cured, then heated to set the dye. Sublimation dye-based UV ink printing onto polyester is preferred. A release layer of protective material (702,704), such as a TEFLON film or sheet, covers a substrate support (705,706). A porous substrate to be printed, such as a textile material (711), is supported on or above the support. Ink is jetted onto the substrate, with some of the ink passing through pores in the substrate and landing on the protective material. UV curable ink is preferably used and is exposed by UV light from a UV light curing head, which solidifies the ink on the substrate. The UV curing light has a long enough focal length to focus on the surface of the substrate and also, where it passes through pores in the substrate, on ink on the protective material, thereby solidifying the ink on the protective material. When the substrate is removed from the support, the solidified ink on the protective material may be wiped from the protective material. The protective material may be a coating on the support over which the substrate slides or a belt that moves with the substrate. A textile substrate may be preconditioned by singeing or shaving to remove fuzz from the fabric that could clog the printheads. A printhead cleaning station is also provided.

The invention relates to a novel polyurethane-acrylic acid-epoxy resin photosensitive pre-polymer, a synthesis method of the pre-polymer, a high-performance ultraviolet (UV) cured polyurethane modified acrylic acid epoxy resin adhesive prepared from the pre-polymer and application of the UV cured adhesive to bonding of a nylon membrane material and a polyurethane or modified polyurethane elastic body. A method for preparing the photosensitive pre-polymer comprises the following steps of: 1, synthesizing a lower-viscosity epoxy acrylic ester pre-polymer; 2, preparing a pre-polymer of urethane acrylate resin; and 3, mixing or reacting the two pre-polymers in a certain ratio so as to obtain the polyurethane-acrylic acid-epoxy resin photosensitive pre-polymer. A polyurethane-acrylic acid-epoxy resin UV cured adhesive is further prepared by adding a photoinitiator, a photosensitive diluent, a light curing crosslinking agent, other necessary aids and the like.

Ink jet printing is provided on large area substrates such as wide width textile webs. The printheads are driven by linear servo motors (633) across a bridge (630) that extends across the substrate. The timing of the jetting of the ink is coordinated with the motion of the printheads (640, 641), so that the heads can be rapidly moved and the ink can be jetted while the printheads are accelerating or decelerating as they move on the bridge. Preferably, ultraviolet (UV) light curable ink is jetted and first partially cured with UV light (645, 646) and then subjected to heating to more completely reduce uncured monomers of the ink on the substrate. Preferably, the heat is applied by contacting the substrate with a heated plate (661, 662). Ink jet printing is provided using ultraviolet (UV) light curable or other curable composition or stable or other printable substance. In certain embodiments the UV ink has a dye-component therein. The ink is jetted onto a substrate, the composition is cured, then heated to set the dye. Sublimation dye-based UV ink printing onto polyester is preferred. A release layer of protective material (702, 704) such as a TEFLON film or sheet, covers a substrate support (705, 706). A porous substrate to be printed, such as a textile material (711), is supported on or above the support. Ink is jetted onto the substrate, with some of the ink passing through pores in the substrate and landing on the protective material. UV curable ink is preferably used and is exposed by UV light from a UV light curing head, which solidifies the ink on the substrate. The UV curing light has a long enough focal length to focus on the surface of the substrate and also, where it passes through pores in the substrate, on ink on the protective material, thereby solidifying the ink on the protective material. When the substrate is removed from the support, the solidified ink on the protective material may be wiped from the protective material.

The present invention relates to metal paint, and is especially visible light cured paint for the surface protection and decoration of various kinds of metal. The visible light cured paint for metal consists of prepolymer of unsaturated olefin radical 0-20 wt%, monomer of unsaturated olefin radical 20-80 wt%, light initiator 1-10 wt%, initiator assistant 0.5-30 wt%, assistant 0-10 wt%, stuffing or pigment 0-40 wt% and solvent 0-30 wt%. The visible light cured paint may be used widely in surface coating of iron and steel, aluminum, copper and other metals and alloys.

The invention relates to an ultraviolet photo-thermal double curing paint with oxygen inhibition resistant effect and a manufacturing method thereof. The double paint comprise the following compositions in weight percentage: 3.0 to 57.0 percent of ultraviolet curing oligomer, 7.0 to 40.0 percent of thermal curing polyhydroxy oligomer, 10.0 to 41.0 percent of curing agent, 15.0 to 60.0 percent of active diluted monomer, 0.5 to 9.0 percent of light evocating agent and 0.5 to 5.2 percent of additive. The double curing paint composition is prepared without needing complicated equipment and has application period as long as 7 hours; the main chain structure of the oligomer is provided with a tertiary amine group which removes the influence of oxygen inhibition effect so as to greatly accelerate the curing speed and complete the light curing process in a short period of between 5 and 15 seconds; after the ultraviolet photo-thermal double curing, a thick paint film with thickness of between 60 and 120 mu m can be prepared; and the obtained paint film has good leveling, high hardness, good impact resistance, good toughness and strong adhesive force and is suitable for coating various substrates.

The invention discloses a flexographic plate CTP (computer to plate) direct printing method and equipment based on a 3D rapid forming printing principle and belongs to the technical field of printing flexographic plate manufacture. The equipment comprises a computer, a 3D rapid forming printer and one of photocuring equipment and heat drying equipment. The 3D rapid forming printer is utilized to spray a solidifiable forming material on the base surface of a flexographic plate so as to form a relieve image, the relieve image is subjected to light curing or thermocuring on-line drying so that the printing information is stabilized on the base surface of the flexographic plate, and then the printer can be used for printing; and the base of the flexographic plate is an organic polymer plate or an organic polymer-organic polymer compound plate. The method omits the middle process such as exposure and development, the plate manufacturing speed is greatly accelerated, the printing quality is improved, the printing cost is reduced, the flow is greatly shortened, the flexography environment friendliness is realized, and the application area is further expanded.

The invention discloses water-based UV black ink with super-high solid content and a preparation method thereof. The black ink comprises the following components in percentage by weight: 20%-60% of high-functionality water-based polyurethane acrylate, 5%-8% of compound photoinitiator, 15%-35% of hydrophilic acrylate diluted body or prepolymer, 10%-25% of solvent and 5%-15% of nano-carbon black pigment. The light curing time of the water-based UV black colored paint of the invention is shorter than 5 seconds, the bottom layer can be completely cured, the comprehensive properties of adhesive force, hardness, toughness and the like are excellent, and the water-based UV black colored paint can be widely applied to the fields of ink, wood paint and the like; the solid content is as high as 80%;and the water-based UV black ink has short drying and curing time, simple construction technology and high production efficiency, can be diluted by water or ethanol or other nontoxic solvents for regulating the viscosity, is suitable for various production modes and production requirements, and is environment-friendly and nontoxic.

The invention relates to a method for improving the laser scanning image light-curing quick-molding efficiency, and in particular relates to an imaging system capable of enabling liquid-state light-sensitive cured resin to be efficiently and quickly cured based on a multi-light-beam laser scanning technology. According to a specific implementation mode, light emitted by a laser light source (3) passes through a collimating lens (4), collimated laser light beams enter an optical fiber beam splitter (5), a beam of laser is split into 1*N light beam matrixes, the laser beams are reflected by scanning galvanometers (7 and 8) and are focused on a light-cured resin surface (10) by virtue of a field lens (9), a workpiece graph layer is efficiently scanned, and N workpieces can be finally, simultaneously and quickly molded. Therefore, the scanning efficiency is improved by N times correspondingly.

The invention relates to a method for directly making a hollow blade ceramic mold based on a photo-curing process. The method is as follows: firstly, ceramic powder and pre-mix liquid are evenly mixed so as to make ceramic slurry; secondly, according to a hollow blade model, a hollow blade mold model containing a gating system is obtained, and the ceramic slurry is directly made into a ceramic mold biscuit on a photo-curing forming machine according to the hollow blade mold model; then, the ceramic mold biscuit is dewatered to obtain a dry ceramic mold; finally, the dry ceramic mold is placed in a high-temperature baking furnace so as to carry out degreasing and sintering, thereby making the hollow blade ceramic mold. The ceramic mold can be used in the casting of a hollow blade, and replaces a multi-layer ceramic shell and core manufacturing process adopted in the prior investment casting. The method does not need the processes of investment pattern making, slurry coating and sand spreading adopted in the prior process, and has the characteristics of simple process, short cycle, low cost and quick returns, etc.

The invention relates to a method for preparing waterborne light-cured urethane resin. The waterborne light-cured urethane resin consists of polyatomic alcohol components, diisocyanate, hydroxyl (methyl) acrylic ester, a neutralizer, a catalyst, a solvent, a polymerization inhibitor and water. The target resin is prepared by one-step solution polymerization or bulk polymerization, and the preparation method is simple and easily operated. The densities of the light-curable group and hydrophilic group of the resin prepared are adjustable, and the resin has the advantages of unique hydrophilicity, superior light curing performance and high hardness of film forming matters, and has wide application prospect in the fields of coating, adhesives, ink, etc.

The invention discloses macromolecule weight urethane acrylate, which is formed by reaction on the basis of aliphatic polyester diatomic alcohol with the molecular weight of 500 to 8000, aliphatic diisocyanate and hydroxy acrylic acid monomer; wherein, polyesterglycol comprises ring-shaped resin, and the mechanical property and hydrolysis resistance property of light curing film are improved. The molecular weight of synthetic resin is 10000 to 50000 units, and acrylic ester double keys on the two ends of molecule chain enable the resin to produce high-efficiency free radical aggregation linkage under the effect of photoinitiators through the radiation of ultraviolet light. The aggregation linkage product of the finished film has good flexility and adhesive force, extremely low light curing contraction percentage, higher tensile strength and breaking elongation with hydrolysis resistance property improved. The invention can be used as the main ingredient or assistant matieral of light curing paint, light curing printing ink and light curing adhesive.

The invention discloses a 3D laser printer with a leveling function. The printer comprises an outer frame unit, a trough, a printing unit, an irradiation unit, a leveling unit and a control unit, wherein the outer frame unit is used for forming a low-cost framework; the trough is used for containing a printing stock solution; the printing unit can longitudinally move relative to the outer frame unit and is positioned at an operation station in the trough; the irradiation unit is used for providing a light-curing laser light source; the leveling unit is positioned between the printing unit and the irradiation unit and is used for leveling the printing surface; the control unit is used for controlling the operating state of each unit; and the leveling unit can longitudinally move, a leveling plate arranged on the leveling unit can horizontally and transversely move in the trough, and the scraping action and leveling action can be simultaneously finished in a reciprocating motion. The invention also discloses a light curing printing method suitable for the 3D printer. The printer disclosed by the invention is stable in printing and high in precision, the levelness of each section is well controlled, and the overall printing deformation rate is low.