223results about How to "Good light diffusion effect" patented technology

The invention provides a polycarbonate combination and a preparation method thereof. In terms of 100 parts of polycarbonate materials by weight, the polycarbonate combination comprises the following components in parts by weight: 100 parts of polycarbonate, 1-10 parts of copolyester, 0.01-0.5 part of aromatic sulphosalts fire retardant, 0.05-0.35 part of organic silicon fire retardant, 0.05-5 parts of anti-dripping agent, 1-15 parts of photodiffusion agent master batches and 0.05-5 parts of antioxidant. The preparation method of the polycarbonate combination comprises the following steps: adding the components of the polycarbonate combination as required into a blender mixer, and evenly stirring and mixing; and carrying out melt mixing, extrusion and granulation on the evenly mixed raw materials in eight temperature areas of a double-screw extruder. The polycarbonate combination provided by the invention has excellent photodiffusion performance, high light transmittance, excellent flame retardant property, safety, environmental protection, favorable heat resistance, easy molding and reduced crystal point defect.

The invention discloses a polycarbonate composite material suitable for an LED (light-emitting diode) lamp cover and a preparation method thereof. Based on the 100 weight parts PHR (parts per hundreds of rubber or resin) of a substrate polycarbonate material, the composition of the composite comprises the following components in PHR: 100PHR of polycarbonate, 5-15PHR of light scattering master batch, 0.2-1.0PHR of flame retardant, 1-3PHR of nano master batch and 0.2-1.0PHR of other additives. In the method, engineering plastic polycarbonate is used as a main body; and the light scattering master batch and the nano additive master batch are firstly prepared through an internal mixer and then smashed at high speed, and finally, the light scattering master batch and other raw materials are subjected to blending, extruding and granulating by adopting a side feeding method. By using the method, the problem that the dispersion of a light dispersing agent and other additives is not uniform issolved, and the obtained light dispersing material has high transmissivity and haze. The polycarbonate composite material disclosed by the invention can be used for preparation of related products inthe optical field, is environment-friendly, high in safety and excellent in various physical and mechanical properties, and is suitable for preparing the LED lamp covers and other light guiding materials.

The invention relates to the technical field of polystyrene composition, particularly to high light-transmittance and high light-shielding polystyrene composition. The high light-transmittance and high light-shielding polystyrene composition is prepared from the following materials by weight: 98.2%-99.6% of polystyrene, 0-1% of silicon light diffusing agent, 0.1-0.2% of a lubricating agent, 0.1-0.2% of a dispersing agent, 0.1-0.3% of antioxidant A and 0.1-0.2% of antioxidant B. The preparation method comprises the steps of uniformly agitating the constituents except for polystyrene by a high-speed mixer; putting the polystyrene and the uniformly mixed materials into the high-speed mixer to carry out three-segment agitation, and extruding and pelletizing the uniformly mixed materials by a double-screw extruder. The polystyrene composition disclosed by the invention is high in light transmittance, high in light shielding property, good in impact strength, good in balance of haze and light transmittance, high in structure strength of the prepared product, simple in process, low in production cost and beneficial for generalization and application.

Exemplary embodiments of the present invention provide an optimal manufacturing method of a microlens to diffuse light. According to exemplary embodiments, a manufacturing method of microlens includes forming a generally convex shaped lens portions made from a light transmissive resin on a substrate having light transmissivity, and curing the lens portions, forming the lens portions being a process in which a plurality of the lens portions are formed so as to be coupled on the substrate.

A diffuser plate with higher light diffusion efficiency and brightness applied to backlight module of Liquid Crystal Display TV (LCD TV) for providing uniform light is disclosed. An optical lens with a diffusion layer is disposed on one side of the substrate. The diffusion layer is arranged above the optical lens for enhancing diffusion effect. The other side of the diffuser plate can be a plane or having a lens structure. By Lenticular lens, the homogeneity of emitted light is improved so as to reduce the amount of diffusion particles being added into the diffusion plate Therefore, the light transmission is increased and the brightness is enhanced. Meanwhile, ability of shielding lamps is considered and Moiré effect is eliminated. Moreover, the diffusion layer is co-extruded on surface of the Lenticular lens together with the substrate so that the device is easy to be produced.

A multiple-layer optical film comprising: a transparent base layer, a diffusion layer formed on the base layer, and an upper prismatic layer formed on the diffusion layer having a plurality of root portions protruding downwardly from the upper prismatic layer to be respectively engaged with a plurality of recesses as recessed in the diffusion layer for firmly interlocking the upper prismatic layer with the diffusion layer. The diffusion layer includes nano or micron particles homogeneously dispersed in a resin matrix to obtain a composite layer having better light diffusibility; and the upper prismatic layer having nice light concentrating effect, thereby cooperatively synergetically forming a multiple-layer optical film having enhanced brightness, light uniformity, and dimensional stability.

The invention discloses a light diffuser board integrated with high transmittance, high haze and high toughness in one body. A fiber-level GPPS such as transparent and blue-background polystyrene is taken as a main material, glass beads are taken as a silicon diffusion agent, and a high haze flexibilizer SCBS is innovatively added. Based on the diffuser board having functions of light collection, light diffusion and light reflection, a product formula is improved and added, auxiliary agents such as a diffusion agent, a light stabilizing agent and a high haze flexibilizer are added to a raw material, and thereby functions of light refraction, light reflection and light diffusion are realized in products, not only can quite high light diffusion and emergent light uniformity be realized, but also a utilization rate of the power source is high, anti-folding performance and shielding performance are good, a penetration rate of products can reach 93%+ / -5%, and the haze can reach 99%+ / -1%.

The invention discloses an acrylic polyurethane coating and a preparation method and application thereof in manufacture of a connecting material or a protective coating. The acrylic polyurethane coating is prepared by mixing hydroxyl acrylic resin, a hydroxyl polyurethane plasticizer and a polyisocyanate curing agent. The acrylic polyurethane coating is mainly used for making the resin connecting material of an optical diffusion film, and the coating after the film formation has good light transmittance and light diffusion property and high scratch resistance, and has the advantages of prevention of falling off of resin micro beads in a diffusion layer. The acrylic polyurethane coating can also be used for making optical films such as brightening films and reflecting films, and the ratio of the three components can be adjusted according to the use and the substrate characteristics of different optical films so as to achieve the coating performances required by different purposes.

The disclosed diffuser film with pores is used in the backlighting unit of a thin-film transistor liquid crystal display. The diffuser film with pores of the present invention includes a substrate of synthetic resin; a diffuser layer with pores on the surface of the substrate has pores, wherein The air hole is formed by coating a composition comprising light-scattering resin and light-scattering particles contained in the light-scattering resin under the synthetic application pressure of 1-5MPa and the moving speed of the substrate at 10-200m / min; And forming an anti-adhesion layer on the other surface of the substrate. The diffusion plate of the present invention may be applied to the back lighting unit of the thin film transistor liquid crystal display.

The invention provides a polycarbonate material composition of a reinforced LED lamp shade. The polycarbonate material composition comprises 100-120 parts of polycarbonate, 10-15 parts of polymethyl methacrylate, 5-15 parts of light scattering master batch, 4-8 parts of interface reinforcing phase, 2-4 parts of inorganic nanoparticles, 2.0-2.5 parts of methoxyl polyglycol acetic acid, 2-4 parts of a compatilizer MAH-g-EPDM and 0.5-1.5 parts of other functional additives, wherein the interface reinforcing phase is at least one of nanometer aluminum oxide crystal particles or crystal whiskers. The polycarbonate material composition of the reinforced LED lamp shade, which is provided by the invention, is relatively excellent in light permeability and light scattering property, is capable of eliminating the phenomena of halo or dark spot generated from the dispersibility, and is also relatively excellent in mechanical property.

Exemplary embodiments of the present invention provide an optimal manufacturing method of a microlens to diffuse light. According to exemplary embodiments, a manufacturing method of microlens includes forming a generally convex shaped lens portions made from a light transmissive resin on a substrate having light transmissivity, and curing the lens portions, forming the lens portions being a process in which a plurality of the lens portions are formed so as to be coupled on the substrate.

A light reflector including a laminate film having a light-diffusive layer on one surface of a substrate layer, wherein the surface roughness index of the light-reflective surface is at least 1, the reflectance thereof is at least 95%, and the regular reflectance thereof is at most 3%. The light reflector has higher brightness and higher reflectivity.