UV-curing light guide adhesive and preparation method thereof

Abstract

The invention discloses UV-curing light guide adhesive and a preparation method thereof; the UV-curing light guide adhesive comprises a photoinitiator, a monomer, polybutadiene dimethacrylate, aliphatic polyurethane acrylate, a rheological agent, a leveling agent, a dispersant, a coupling agent, a defoaming agent, and light guide powder; the preparation method comprises the steps of first, mixing well a photo-curing monomer, polybutadiene dimethacrylate and a coupling agent; second, adding aliphatic polyurethane acrylate, a leveling agent, a dispersant, a defoaming agent and a photo-curing agent, and mixing well; third, adding light guide powder, and mixing well; fourth, adding a rheological agent, and mixing well to obtain a finished product; the prepared UV-curing light guide adhesive has excellent advantages of excellent yellowing resistance, peel strength, impact resistance, high luminance, uniformity and the like; the UV-curing light guide adhesive is applied to the surface of reflecting film by means of printing, roll coating, brush coating, and curtaining and is cured by UV irradiation, the technique omits the procedure of manufacturing a light guide plate, production efficiency is improved, and production cost is lowered.

Description

technical field [0001] The invention relates to a functional adhesive, in particular to a UV light curing light guide adhesive used in a liquid crystal display backlight module and a preparation method thereof. Background technique [0002] With the continuous improvement of high-brightness LED point light sources, the design of edge-lit LED line light sources also promotes the development of liquid crystal displays such as LCDs in the direction of thinness and lightness. Liquid crystal displays usually include liquid crystal panels and backlight modules, etc. It is composed of light guide plate, emission plate and light source. [0003] The light guide plate materials mainly include optical acrylic, polycarbonate, styrene copolymer, and cycloolefin polymer. The optical acrylic is used as the base material, and a luminous body is installed on the side. The high light conductivity of the light spot makes the light passing through the light guide plate irradiate each light gu...

AI Technical Summary

Problems solved by technology

Screen printing has the advantages of small investment in equipment, wide applicability to plates, high production efficiency, and is suitable for mass production of a single product. However, screen printing has the advantages of large investment in auxiliary raw materials, complicated production process, time-consuming, and many quality control links. , High defect rate, difficult to improve luminous efficiency, difficult to adjust luminous uniformity, easy to yellow, ink easy to fall off and yellow, serious light decay, not environmentally friendly, corrosion, poisonous, high processing costs and other defects, and light guide ink only It can be printed on the surface of optical acrylic board; the direct injection molding method has defects such as large equipment investment, high mold cost, difficult production process, and inability to produce large-scale light guide plates; laser engraving has high requirements for equipment, and is currently limited to acrylic materials. The speed is slow, and it is almost impossible to produce large graphic dots or large-scale designs that require tens or even millions of dots, let alone glass light guide plates

[0005] In the prior art, the reflective film is separated from the light guide plate. Generally, the reflective film is relatively thin and needs a back plate as a support. The flatness of the back plate will affect the quality of the picture. The relevant mechanical vibration experiments have proved that the structure of the separated reflective film and light guide plate, It is easy to wear each other, and it will also affect the image quality, which is also one of the key factors restricting the development of ultra-thin and large-size LCD displays

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