47results about How to "Light transmittance has little effect" patented technology

The invention relates to a light diffusing agent, a PMMA (polymethyl methacrylate) light diffusing plate and a manufacturing method thereof. The light diffusing agent is a random copolymer of styrene (St) and methacryloxypropylisobutyl polyhedral oligomer silsesquioxane (MAiBuPOSS). The PMMA light diffusing plate comprises the following components in percentage by weight: 97.0-99.5% of polymethyl methacrylate and 0.5-3.0% of light diffusing agent. The refractive indexes of the styrene component and the MAiBuPOSS component in the light diffusing agent differ from the refractive index of PMMA; when passing through a material, a light ray is refracted for many times and becomes bright and soft after passing through a substrate. Meanwhile, the MAiBuPOSS component ensures that the dispersibility of PS (Poly Styrene) in PMMA is remarkably improved, excellent light transmission and light scattering are obtained, and the optical efficacy is high. The PMMA light diffusing plate manufactured by the invention can be used for LED (Light Emitting Diode) illumination lamps, such as a plate lamp, an advertising lamp box, a professional film viewer, a down lamp and the like.

The invention discloses weather-resistant and flame-resistant light-diffusion PC applicable to outdoor lampshades and a preparation method of the weather-resistant and flame-resistant light-diffusion PC. The weather-resistant and flame-resistant light-diffusion PC is prepared by, by weight percentage, 81.25-90.17% of PC, 5-15% of toughening agent, 0.8% of light diffusion agent, 1.5-2.5% of flame retardant, 0.4-0.6% of synergic-effect flame retardant, 0.1-0.5% of hydrolysis-resistant agent, 0.1-0.5% of anti-UV agent, 0.03-0.05% of pigment, 0.3% of antioxidant and 0.3% of dispersing agent. The light-diffusion PC has the advantages that the light-diffusion PC is good in flame-retardant effect and weather resistance, indoor and outdoor use requirements can be satisfied, the light-diffusion PC is high in light permeability, good in toughness and ideal in appearance color, and consumers' requirements on lamps can be satisfied.

The invention discloses an LED fluorescent glue that improves the uniformity of light emission. In parts by weight, the fluorescent glue consists of 1 part of packaging glue, 0.01-1 part of fluorescent powder, 0.01-0.1 part of silica-based inorganic nanoparticles, 0.01 part of ‑1 part silicone granules. Inorganic nanomaterials and silicone particles are mixed in the encapsulation glue, which reduces the sedimentation rate of the phosphor in the encapsulation glue, improves the uniformity of the phosphor distribution in the colloid, makes the white light spot more uniform, and improves the light diffusivity and transmittance. The light rate is maximized, and by changing the propagation path of the light, the light of various wavelengths is more fully mixed, and the spatial color uniformity of the light is further improved. It also provides an LED packaging method and LED that improve the uniformity of light emission, which improves the consistency of products, reduces the probability of uneven color distribution in space due to uneven distribution of phosphor powder, and improves product yield and product production. efficiency.

The invention discloses a flame-retardant light-diffusing PP material with the thermal-oxidative aging resistant function and a preparation method thereof. The PP material comprises a polypropylene resin, a composite flame retardant, a light diffusing agent, a composite antioxidant, a high temperature resistant heat stabilizer, an anti-ultraviolet agent, and other auxiliary agents. The prepared flame-retardant light-diffusing PP material has the characteristics of high luminous flux, good flame retardancy, no precipitation of the flame retardant during the use, long service life, and the like.

Hydrophobic dust-proof coating for greenhouse film, a preparing method thereof and applications of the coating are disclosed. The coating includes, by mass, 40-71% of modified fluorocarbon resin, 0-1%of a leveling agent, 16-56% of a diluting agent and 4-12% of a curing agent. The preparing method of the coating is also disclosed. The fluorocarbon-resin-containing coating prepared by the method has excellent film forming performance, adhesion and flexibility, good ultraviolet resistance, weather fastness and resistance to dirt, and the like, and is convenient to scrub and simple in process. Aproduction process is substantially free of pollution. The coating is prone to industrial production and large-scale popularization and application.

The invention belongs to the technical field of semiconductor packaging and discloses high-heat-resistance packaging adhesive, an LED packaged device employing the same and a packaging method. The high-heat-resistance packaging adhesive is made from, by weight, 100 parts of an adhesive material and 5-500 parts of a fluoride material. Compared with traditional packaging adhesive materials, the high-heat-resistance packaging adhesive has a higher doping ratio of the inorganic fluoride material, which helps effectively improve heat resistance and heat-dissipating property of the packaging adhesive; more importantly, the high-ratio mixing of the fluoride powder material herein brings very low influence on the light transmittance of the adhesive material; after the high-heat-resistance packaging adhesive is applied to an LED packaged device and solidifies, very high light transmittance can be maintained for the device herein, and therefore, light emergence efficiency of the pacakaged deviceis never affected.

The invention discloses a water-based hydrophobic coating as well as a preparation method and application thereof. The coating comprises the following components in mass fraction: 57-80% of modified fluorocarbon resin, 2.4-4.8% of coalescing agent, 0.5-0.8% of base material wetting agent, 0.3-0.8% of leveling agent, 0-0.2% of antifoaming agent, 0-1% of thickener, 1-2% of hydrophobic agent, 3.8-7.7% of curing agent, and the balance liquid paraffin. The prepared fluorocarbon resin water-based hydrophobic coating has excellent film forming property and hydrophobicity, has high coating adhesion, is safe and environment-friendly, has simple process, and is easy for industrial production and large-scale popularization and application.

The invention discloses a system precision processing method of a fragile transparent special-shaped 3D structure. The system precision processing method comprises the following steps of building a laser welding platform of the special-shaped 3D structure, wherein the platform comprises a laser, a laser path, a coaxial vision system, a paraxial vision system, a welding head, a clamp, a horizontalwelding bracket and a movement platform; clamping a sample by the clamp; mounting the clamp after clamping the sample to the movement platform, and adjusting the clamp by the coaxial vision system and the horizontal adjusting bracket; and grabbing a welding profile by the paraxial vision system to perform profile positioning and processing path planning; generating laser by the laser, and focusing the laser on a welding interface to be welded through the laser path and the welding head, and moving the movement platform according to the positioned profile and the planned processing path untilfinishing the welding; placing a welded sample in an annealing furnace, and annealing according to a temperature curve of heating, constant annealing temperature and cooling; and placing the annealedwelded sample in a reinforcing furnace to be reinforced.

The invention provides a conductive 3D printing material, and a preparation method and application thereof. The conductive 3D printing material is prepared from the following components in parts by mass: 60 to 90 parts of acrylate resin, 5 to 20 parts of an acrylic reactive diluent, 0.5 to 5 parts of a photoinitiator, 0.5 to 20 parts of a nanometer conductive filler and 0.5 to 2 parts of a dispersing agent. As needed, the conductive 3D printing material may also comprises 0-0.2 part of a fluorescent whitening agent and 0-2 parts of a pigment and other second fillers. The conductive filler adopted by the conductive 3D printing material is nano-sized, so the problem of sedimentation of the conductive filler in the storage and application processes of the conductive 3D printing material is relieved, and the problem of low light transmittance of a 3D part printed by the conductive 3D printing material is also relieved. The conductive filler is in a rod shape, a point shape, a sheet shape and the like, so a net-shaped conductive system with high conductivity can be formed, cost is finally reduced, conductivity is improved, and the sedimentation problem of the conductive filler is relieved.

The invention discloses an aluminate light conversion agent and a preparation method thereof as well as a light conversion film containing the aluminate light conversion agent. The general formula of the aluminate light conversion agent is A1-xZnxAl12O19: Mn<4+>, wherein A is at least one of Ca<2+>, Sr<2+> and Ba<2+> and x is more than or equal to 0 and less than 1. The preparation method comprises the following steps: sufficiently grinding metal oxide, nano metal oxide, alkaline-earth salt, an activating agent and a fluxing agent, and uniformly mixing; adding a mixture into a crucible; putting the crucible into a high-temperature furnace; and carrying out program temperature rising and cooling to obtain the aluminate light conversion agent. The light conversion film containing the aluminate light conversion agent is prepared from the following raw materials in parts by mass: 100 parts of a thin film matrix, 8-45 parts of a master batch matrix, 0.5-10 parts of the aluminate light conversion agent, 0.15-0.3 part of a lubricating agent, 0.5-1.5 parts of a light stabilizer and 0.3-1.5 parts of an antioxygen. The aluminate light conversion agent disclosed by the invention has the advantages of high light emitting strength, high light conversion efficiency, good stability, long service life and simple preparation method; the adding amount in an agricultural thin film is small, and the aluminate light conversion agent has good compatibility with the thin film matrix and has less influences on light transmittance of the thin film.

The invention relates to the field of light diffusion materials, and particularly discloses a foamed light diffusion material and a preparation method thereof. The foamed light diffusion material is prepared from the components in parts by weight: 93-105 parts of PC, 0.1-0.5 part of antioxidant and 0.3-0.8 part of a release agent. The preparation method comprises the following steps that granules are prepared, and 93-105 parts by weight of PC, 0.1-0.5 part by weight of antioxidant and 0.3-0.8 part by weight of the release agent are uniformly mixed and extruded to obtain the granules; and injection molding foaming and monomer removal are carried out, supercritical carbon dioxide is injected in the injection molding process to carry out foaming and steam stripping monomer removal to obtain the foamed light diffusion material. The temperatures of different areas of a screw rod are 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 280 to 300 DEG C, 230 to 380 DEG C and 60 to 80 DEG C in sequence; and the pressure maintaining pressure is 60 to 100 MPa. The foamed light diffusion material can be used for processing an LED lamp housing, and has the advantages of high haze and low residual monomer content; and in addition, the preparation method has the advantage of reducing the possibility of mold sticking of a product in the processing process.

The invention belongs to the technical field of antireflection films, and particularly relates to a preparation method of a high-light-transmittance amphiphobic antireflection film. The method comprises the following steps: preparing grass-like alumina sol and silicon dioxide solid sphere sol by a sol-gel method, plating the mixed sol on a glass substrate by a dipping-pulling method, and modifying grass-like aluminum oxide and silicon dioxide solid spheres by using 1H,1H,2H,2H-perfluorodecyl triethoxy silane through chemical vapor deposition. The coating prepared by the method is high in light transmittance, and has excellent properties of super-hydrophobicity, oleophobicity, self-cleaning and the like. The sol-gel method is simple in process, extensible, low in cost and high in light transmittance by adopting a sol-gel method, and has a great prospect in solar energy, building glass, optical equipment and other applications.

The invention discloses a hardened flame-retardant heat-insulating master batch and a production method therefor. The hardened flame-retardant heat-insulating master batch is prepared from the following raw materials in parts by weight: 50-70 parts of support resin polyethylene terephthalate (PET), 20-30 parts of polyethylene naphthalate (PEN), 5-10 parts of flame retardant, 5-10 parts of heat-insulating auxiliaries and 5-10 parts of dispersant. According to the hardened flame-retardant heat-insulating master batch and the production method therefor, after the PET master batch is added into aPET material product, a flame retardant rating of an obtained PET product can reach a level V0 (UL94), meanwhile, the infrared ray barrier rate reaches 60% to 99% (changing along with an addition level), and the influence on light transmittance of the product is relatively low. The PET master batch disclosed by the invention is prepared through subjecting various additives and the PET resin to mixing granulation, the preparation process is simple, and the cost is relatively low. The PEN resin is added into a formula of the PET master batch, so that mechanical properties and barrier performanceof the product can be improved, and thus, the field of application of the PET product is enlarged.

The invention discloses a transparent wood processing technology for manufacturing high-light-transmittance wood crafts, and relates to the technical field of wood processing. The processing technology comprises the following steps: after lignin is removed from wood, the wood is placed in steeping liquor containing silver nanowires for steeping treatment, and then is steeped with transparent resin to obtain transparent wood. According to the method, before the delignified wood is filled with a polymer matrix, the silver nanowires with the length-diameter ratio are filled in the channels of the wood, the film channels constructed by the silver nanowire films are formed in the channels of the wood, and due to the fact that the silver nanowire films have good flexibility, the film channels formed in the wood channels have good stress dispersion functions, so that the polymer matrix is added to the wood channels, such that the film channels formed in the wood channels have the good stress dispersion effect so as to dissipate the stress generated during the curing expansion of the polymer matrix by the film channels so as to achieve the technical effects of no damage to the internal weak structure of the wood and no collapse of wood cells.

The invention discloses a reflective polypropylene composite material suitable for automotive interiors and a preparation method of the reflective polypropylene composite material. The polypropylene composite material is composed of the following raw materials in percentage by weight: 10-70% of homo-polypropylene; 0-45% of polypropylene random copolymer; 5-25% of a propylene-ethylene copolymer toughening agent; 10-40% of whisker master batch; 1-10% of reflective powder; 0.1-2% of an antioxidant; and 0-5% of other additives. Compared with the conventional light-proof inorganic filler (such as talcum powder, calcium carbonate and the like), the light-transmitting whisker has the advantages that the loss of light transmittance of the material can be greatly reduced on one hand, and a better stiffening effect can be achieved on the other hand; compared with common light-transmitting filler glass fibers, the crystal whiskers can avoid the size control problem caused by height orientation during injection molding of the glass fibers. The high light transmittance of the material ensures that the reflective filler in the material can fully play a role, so that the use amount of the reflective filler can be remarkably reduced.