A study on UV-curable adhesive sealant for LCD panel

Abstract

With a view to suppressing the overlap shift between the TFT substrate and the color filter substrate, application of UV sealant is considered in the LCD panel assembly process. The initial tensile strength and moisture resistance of the UV sealant are evaluated and studied. In regard to the initial tensile strength, the stress applied to the sealing part during the glass cutting process, in which the peeling of the seal is most likely, is quantized by a numerical method based on the finite element method. By comparison of this result with tensile intensity tests of the UV sealant, acceptable performance is confirmed. The resistance to moisture is degraded due to large distortions on the interface between the sealant and the glass substrate, since a UV sealant hardened only by UV light has a large shrinkage on solidifying. Such shrinkage is small in a UV sealant that is hardened completely by applying heat after illumination of UV light, and hence presents practically no problem, with a moisture resistance equal to that in conventional heat curing‐type sealant. From these results, the UV sealant completely hardened by applying heat after UV light illumination is found to be applicable to TFT‐LCD from the point of view of tensile strength and humidity resistance. © 2000 Scripta Technica, Electron Comm Jpn Pt 2, 83(5): 21–27, 2000

Progress in optical adhesive and lamination process of touch screen in 3C products

“…LOCA is liquid at room temperature and has fluidity. Process flow of LOCA lamination can be divided into 4 steps of dispensing, lamination, leveling, and curing, 94 as shown in Figure 9. The main performance comparison between OCA and LOCA is given in Table 6.…”

Preparation of transparent nanocomposites from UV‐ and thermo‐curable epoxyacrylate and graphene oxide for the application of corrosion protection coatings

“…Alternative methods such as UV and microwave assisted curing have been developed to solve these problems. UV curing has several advantages such as a solvent‐free process, low energy consumption, room temperature operation and shortened curing time; yet, severe curing shrinkage, low moisture resistance and insufficient strength are found in UV‐cured epoxy materials. It would be desirable to combine the advantages of UV‐ and thermo‐cure processes for protective coatings.…”

Dependence of Optical Properties of UV-Curable Sealant on Amount of Catalyst N, N-Dimethylbenzylamine

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