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Bonding glue and bonding method for segment code liquid crystal screen and tft liquid crystal screen combined instrument cover
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A technology of combination instrument and LCD screen, applied in the field of vehicle instrumentation, can solve the problem of segment code LCD screen being easily broken, etc.
Active Publication Date: 2018-08-28
HEILONGJIANG TIANYOUWEI ELECTRONICS CO LTD
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[0003] The purpose of the present invention is to solve the problem that the segment code LCD screen under the cover plate is easily broken under the force during the bonding process of the existing segment code LCD screen and the cover plate of the TFT LCD screen combination instrument
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specific Embodiment approach 1
[0028] Specific Embodiment 1: A bonding glue for a segment code liquid crystal screen and a TFT liquid crystal screen combination meter cover of this embodiment includes the following components in weight percentage: 35.0% polyurethaneacrylateprepolymer, 12.0% epoxy resin monomer %, acrylate monomer 45.0%, coupling agent 1.5%, photoinitiator 3.5%, adhesion promoter 2.0%, fluorescent substance 1.0%.
[0029] Further, the epoxy resin is an alicyclic epoxy resin, and the cured product of the alicyclic epoxy resin has high compressive and tensile strength, and can still maintain good mechanical properties under long-term exposure to high temperature conditions. Arc resistance, UV aging resistance and weather resistance are good, avoiding the cover plate delamination caused by the aging of the adhesive, which affects the service life of the entire instrument.
[0030] Further, the weight average molecular weight of the polyurethane acrylate is 5000-8000.
[0031] Further, the ac...
specific Embodiment approach 2
[0037] Specific implementation mode 2: the bonding method of segment code liquid crystal screen and TFT liquid crystal screen combined meter cover in this embodiment, the specific steps include:
[0038] Step a. Use acetone or ethanol solution to clean the surface of the segment code LCD screen and the bonding surface of the cover;
[0039] Step b, using the gluing equipment on the surface of the segment code LCD screen to evenly coat the adhesive glue on the segment code LCD screen set glue area according to a specific track;
[0040] Step c, cover the cover plate on the segment code LCD screen, align and fit;
[0041] Step d, irradiating with ultraviolet light to pre-cure the bonding glue;
[0042] Step e, using a fluorescent substance detector to detect the distribution range of the fluorescent substance, and then detect the outline of the glue coating, so as to judge whether the coating range exceeds the set glue application area or is not filled with the set glue applica...
specific Embodiment approach 3
[0047] Specific embodiment 3. The difference between this embodiment and the specific embodiment is that the gluing track described in step b is a repeated "X" shape, such as figure 2 shown.
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Abstract
The invention belongs to the technical field of vehicle instruments, specifically relates to a joint adhesive for a segment LCD screen and a cover plate of a TFT LCD screen combination instrument anda jointing method, and aims at solving the problem that an existing segment LCD screen is easily broken by force while the segment LCD screen and the cover plate of the TFT LCD screen combination instrument are jointed. The joint adhesive comprises the following components in percentage by weight: 30.0-35.0% of polyurethane-acrylateprepolymer, 10.0-15.0% of epoxy resin monomer, 45.0-50.0% of acrylatemonomer, 0.5-2.0% of a coupling agent, 3.0-5.0% of a photoinitiator, 2.0-5.0% of adhesion promoter, and 0.5-1.0% of fluorescent material. The jointing method comprises the steps of cleaning, coating the adhesive, pre-curing, detecting, reworking, and completely curing. The joint adhesive and the jointing method are applicable to the jointing operation of the cover plates of various vehicle-mounted instruments and display screens.
Description
technical field [0001] The invention belongs to the technical field of vehicle instruments, and in particular relates to a bonding glue and a bonding method for a combined instrument cover plate of a segment code liquid crystal screen and a TFT liquid crystal screen. Background technique [0002] With the increasing intelligence and entertainment of vehicles, the segment code LCD screen and color LCD screen combination instrument of the vehicle are developing in the direction of large screen and human-computer interaction. The segment code LCD screen cannot display dynamic effects. If you want to realize For dynamic display, TFT LCD screen must be used, but the cost of TFT (Thin Film Transistor, thin film transistor) LCD screen instrument is relatively high, and the development cycle is long, which seriously affects the research and development cycle and production cost of the whole vehicle, which restricts the development of human-computer interface in China. For the applic...
Claims
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