A production process of a composite panel for instrument display and the composite panel produced thereby

Abstract

The application relates to the technical field of instrument display, in particular to a production process of a composite panel for instrument display and the prepared composite panel. The production process comprises the following steps: step A: printing ink on the surface of a transparent film, curing, and forming a pattern layer on the surface; step B: coating UV adhesive on one side of the pattern layer of the transparent film, and forming an uncured UV adhesive layer on the surface; and step C: bonding the uncured UV adhesive layer on the transparent film with an anti-haze film, and curing to obtain a composite material. The pattern layer is arranged between the anti-haze film and the transparent film, and display is carried out through the transparent film, so that the pattern can be effectively observed, and the pattern layer is protected, and problems such as corrosion and falling-off are avoided. Through the bonding effect of the UV adhesive, the transparent film and the anti-haze film are stably connected, the structural stability of the composite panel is improved, and the possibility of falling-off after long-term use or in a harsh environment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of instrument display, more specifically, it relates to a production process of a composite panel for instrument display and the composite panel prepared thereby. BACKGROUND

[0002] Instrument display panels are an indispensable part of various instruments, mainly used for displaying measurement data and operation information. With the progress of science and technology, the application range of instrument display panels has gradually expanded, covering the fields of pressure instruments, flow instruments, and various analytical instruments. In particular, in high-end temperature control meters and other precision instruments, the quality of the panel directly affects the overall performance of the equipment and the user experience. Therefore, how to improve the display effect, durability and aesthetics of the panel has become the focus of the industry.

[0003] At present, the commonly used instrument display panels on the market are mostly made by hot pressing composite of acrylic film and tea-colored PC film, and printing LOGO patterns on the surface. This traditional manufacturing method can meet the basic display and protection needs, but there are still some deficiencies in actual application. For example, after long-term use, the printed LOGO pattern is prone to falling off, and the adhesion strength between the acrylic film and the tea-colored PC film is low, which can easily cause cracking and other problems. In addition, in harsh environments such as high temperature and high humidity, the performance of the panel will further decrease, and the wear resistance and durability of the pattern are difficult to guarantee, thereby affecting the service life and appearance quality of the product.

[0004] Although the existing production method can achieve the basic function of the panel to a certain extent, there are obvious deficiencies in the wear resistance and durability of the pattern. Especially in extreme environmental conditions such as high temperature and high humidity, the panel produced by the traditional hot pressing composite process is prone to pattern falling off, poor adhesion, and other problems, which not only affects the service life of the product, but also reduces the user's satisfaction. Therefore, it is urgent to develop a new production process to solve these problems in the existing technology and improve the comprehensive performance of the panel. SUMMARY

[0005] In order to protect the pattern and reduce the phenomenon of falling off of the composite panel, the present application provides a production process of a composite panel for instrument display and the panel prepared thereby.

[0006] In a first aspect, the present application provides a production process of a composite panel for instrument display,

[0007] Step A: printing ink on the surface of the transparent film, curing, and forming a pattern layer on the surface thereof;

[0008] Step B: coating UV adhesive on one side of the pattern layer of the transparent film, and forming an uncured UV adhesive layer on the surface thereof;

[0009] Step C: one side of the transparent film on the uncured UV glue layer is attached with the anti-halo film, and is completely cured to obtain a composite material.

[0010] In the above process, the transparent film is printed with ink, and the pattern layer is formed after curing. After the transparent film with the pattern layer is coated with UV adhesive, the uncured UV glue layer is attached with the anti-halo film, which facilitates the stable attachment of the transparent film and the anti-halo film by the uncured UV glue layer. After the UV glue layer is completely cured, the anti-halo film is stably connected with the transparent film, and the pattern layer between the anti-halo film and the transparent film can provide better protection, avoiding scratching, corrosion, and falling off when the panel is used in instrument display, and improving the protection of the LOGO pattern.

[0011] Specifically, the composite panel is used for panel display of instruments, the anti-halo film is located at the bottom of the composite material, and the transparent film is located at the surface of the composite material, so that the LOGO pattern can be clearly observed through the transparent film. The LOGO pattern is better protected, and the transparent film has high transparency, so that the pattern can be clearly observed. The anti-halo film is a tea-colored PC, which is stably attached after being connected with the transparent film by UV adhesive curing, avoiding the possibility of cracking and delamination in harsh environments such as high temperature and high humidity, and improving the structural stability of the composite panel.

[0012] In summary, by arranging the pattern layer between the anti-halo film and the transparent film and displaying through the transparent film, the pattern can be effectively observed, and the pattern layer can be better protected to avoid corrosion and falling off. The transparent film and the anti-halo film are stably connected by the attachment of the UV adhesive, which improves the structural stability of the composite panel and reduces the possibility of falling off after long-term use or in harsh environments.

[0013] Further, the transparent film can be a transparent PC film, a transparent PET film, a transparent PMMA film, a transparent PBT, etc. In the present embodiment, the transparent PET film with a light transmittance of 92-93% is preferred.

[0014] By using the above technical solution, the transparent film is preferably a transparent PET film with a light transmittance of 93%, which improves the transparency and optical performance of the composite panel, ensures the clear visibility of the pattern, and at the same time enhances the overall weather resistance and mechanical strength of the composite panel, prolonging the service life of the composite panel.

[0015] Preferably, the thickness of the transparent film is 0.05-0.15 mm; the thickness of the anti-halo film is 0.5-0.8 mm; and the thickness of the UV glue layer is 0.2-0.8 microns.

[0016] By adopting the above technical scheme, the thickness of the transparent film is 0.05-0.15 mm, the thickness of the anti-dazzling film is 0.5-0.8 mm, and the thickness of the UV glue layer is 0.2-0.8 microns, so as to ensure the matching and stability between the layers. The thickness of the transparent film is moderate, which not only ensures sufficient transparency and mechanical strength, but also does not increase unnecessary thickness, thereby improving the overall lightness of the composite panel. The thickness of the anti-dazzling film is reasonably designed, which can ensure the anti-dazzling effect while avoiding the increase of cost and processing difficulty caused by excessive thickness. The thickness of the UV glue layer is controlled within the range of 0.2-0.8 microns, which can not only ensure good adhesion effect, but also avoid the reduction of transparency and the increase of cost caused by excessive thickness of the glue layer. The optimization of these size parameters significantly improves the structural stability of the composite panel in long-term use and harsh environment, reduces the risk of cracking, falling off and other risks, and prolongs the service life of the product.

[0017] Preferably, the curing degree in step A is complete curing, and the surface of the pattern layer is non-sticky, and the curing condition is 65-75℃ and the curing time is 25-35 minutes.

[0018] By adopting the above technical scheme, the completely cured pattern layer can ensure that its surface is non-sticky, thereby avoiding unnecessary adhesion of the pattern layer with other substances in the subsequent processing process, and improving the clarity and integrity of the pattern. At the same time, the optimized curing condition (65-75℃, 25-35 minutes) can ensure sufficient curing of the pattern layer while avoiding the performance degradation of the material caused by excessive temperature or time, thereby improving the overall quality and service life of the composite panel.

[0019] Preferably, the ink is composed of the following raw materials in weight percentage:

[0020] Epoxy-modified acrylate 40-58%

[0021] Polyurethane acrylate 20-33%

[0022] Photoinitiator 1-3%

[0023] Thermal initiator 0.5-2%

[0024] Colorant 0.1-5%

[0025] The balance is an active diluent.

[0026] By adopting the above technical scheme, the epoxy-modified acrylate and the polyurethane acrylate in the ink both have high-temperature resistance, high-humidity resistance and good adhesion, and can form a pattern layer with high adhesion stability under the action of the initiator. In addition, the active diluent further reacts with the epoxy-modified acrylate and the polyurethane acrylate to form a cross-linked macromolecular polymer, which not only improves the adhesion stability, high-temperature resistance and high-humidity resistance of the pattern layer, but also promotes the uniform dispersion of the colorant in the raw material system, ensuring that a clear and stable pattern is formed on the surface of the transparent film. This significantly improves the durability and appearance quality of the composite panel, avoiding problems such as pattern peeling and wear in long-term use or harsh environments.

[0027] Preferably, the UV adhesive is composed of the following raw materials in weight percentage:

[0028] Polyurethane acrylate 65-85%

[0029] Photoinitiator 1-3%

[0030] The balance is an active diluent.

[0031] By adopting the above technical scheme, the combination of polyurethane acrylate and active diluent makes the UV adhesive have good adhesion and curing performance. During the curing process, the polyurethane acrylate can form stable chemical bonding with the transparent film and the anti-dazzle film, thereby enhancing the connection strength of the two, avoiding cracking and peeling in long-term use or harsh environments. The presence of the photoinitiator ensures the rapid curing of the UV adhesive layer under light, improving production efficiency. The addition of the active diluent reduces the viscosity of the adhesive, making it easier to spread and evenly distribute, while also enhancing the flexibility and adhesion of the adhesive, improving the overall structural stability of the composite panel.

[0032] Preferably, the polyurethane acrylate is a polyurethane acrylate composite, which is composed of the following raw materials in weight percentage:

[0033] Polyurethane acrylate 48-65%

[0034] Methacrylate single-terminated dimethyl polysiloxane 10-20%

[0035] Methacryloyloxyethyl maleate monoester 10-30%

[0036] Polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer.

[0037] By adopting the above technical scheme, the components in the polyurethane acrylate compound play a synergistic role, which can further improve the dispersion uniformity and stability of the colorant, enhance the high temperature resistance, high humidity resistance, adhesion and tackiness. When used in ink, it can form a more stable pattern layer, improve the adhesion stability of the pattern layer, and prevent problems such as peeling, corrosion, etc. in long-term use or harsh environment. At the same time, when used in UV adhesive, it can promote the bonding stability between the UV adhesive layer and the pattern layer, further improve the connection stability of the transparent film and the anti-haze film, thereby improving the overall structural stability and durability of the composite panel. At the same time, when applied to instrument display, after long-term use, it can prevent the pattern layer from peeling off, the transparent film and the anti-haze film from cracking and peeling off, etc., thereby improving the durability of the composite panel. Preferably, the active diluent in the UV adhesive and the active diluent in the ink are one or more of THFA diluent, NVP diluent and HDDA diluent.

[0038] By adopting the above technical scheme, the active diluent in the UV adhesive and the active diluent in the ink are one or more of THFA diluent, NVP diluent and HDDA diluent, which can significantly improve the adhesion performance of the UV adhesive layer and the pattern layer, and enhance the overall structural stability of the composite panel. THFA diluent has excellent adhesion and chemical resistance, NVP diluent can be crosslinked with vinyl ether or acrylic functional groups to form a highly active diluent, and HDDA diluent has low viscosity and good adhesion, which can improve the flexibility of the cured film. These properties work together to ensure that the composite panel does not easily peel off the pattern layer, crack or delaminate the transparent film and the anti-haze film in long-term use or harsh environment, thereby greatly improving the durability and reliability of the composite panel.

[0039] THFA is the abbreviation of tetrahydrofurfuryl acrylate, which has good adhesion, dilution, chemical resistance and water resistance. NVP is the abbreviation of N-vinyl pyrrolidone, which functions to crosslink with vinyl ether or acrylic functional groups to form a highly active diluent in these systems. HDDA is 1,6-hexanediol diacrylate, which has low viscosity, strong dilution capacity, good adhesion, and can improve the flexibility of the cured film.

[0040] Preferably, the curing degree in step A is semi-curing, and the cured pattern layer has certain adhesion. The curing condition is 65-75℃, and the curing time is 2-5 minutes.

[0041] By adopting the above technical scheme, the curing degree in step A is semi-curing, so that the pattern layer after curing has certain adhesion, the curing condition is 65-75 DEG C, and the curing time is 2-5 minutes. The semi-curing treatment mode makes the pattern layer more easily connected with the UV glue layer in the subsequent contact with the UV glue layer, and interacts with the UV glue layer, further improves the connection strength between the transparent film and the anti-haze film, enhances the overall structural stability of the composite panel, and reduces the risk of pattern layer falling off in long-term use.

[0042] In a second aspect, the application provides a composite panel for instrument display, comprising a transparent film and an anti-haze film, wherein the transparent film is provided with a pattern layer on one side close to the anti-haze film, and the transparent film and the anti-haze film are connected through a UV glue layer, and the composite material is made by a production process of a composite panel for instrument display.

[0043] By adopting the above technical scheme, the transparent film and the anti-haze film of the composite panel are connected through the UV glue layer, and the transparent film is provided with the pattern layer on one side close to the anti-haze film, so as to ensure that the pattern layer is located between the two films, thereby effectively preventing the pattern layer from being worn, corroded, and falling off in long-term use or harsh environment. At the same time, the transparent film has high transparency and can clearly display the pattern, and the anti-haze film enhances the anti-haze effect of the panel, improves the visual comfort and aesthetics of the panel. The use of the UV glue layer further improves the adhesion stability between the transparent film and the anti-haze film, avoids the problems of cracking and delamination in harsh environments such as high temperature and high humidity, and improves the overall structural stability and durability of the composite panel.

[0044] Preferably, one side of the pattern layer away from the transparent film is fixedly bonded to the anti-haze film.

[0045] By adopting the above technical scheme, one side of the pattern layer away from the transparent film is fixedly bonded to the anti-haze film, so as to ensure that the pattern layer is firmly clamped between the transparent film and the anti-haze film, improve the wear resistance and corrosion resistance of the pattern layer, and prevent the pattern layer from falling off or being damaged in long-term use. At the same time, this fixed bonding mode enhances the overall structural stability of the composite panel, reduces the risk of cracking and delamination in harsh environments such as high temperature and high humidity, and prolongs the service life of the composite panel.

[0046] In summary, the application has at least one of the following beneficial technical effects:

[0047] 1. By arranging the pattern layer between the transparent film and the anti-haze film, and displaying through the transparent film, not only the pattern can be effectively observed, but also the pattern layer can be well protected, avoiding corrosion, falling off and other problems, and improving the wear resistance and durability of the pattern;

[0048] 2. The transparent film is connected with the anti-haze film stably by the lamination of UV adhesive, avoiding cracking and delamination in harsh environments such as high temperature and high humidity, improving the structural stability of the composite panel and prolonging the service life of the product;

[0049] 3. The use of special formula ink and UV adhesive improves the high temperature resistance, high humidity resistance and adhesion stability of the pattern layer and the composite panel, further improving the reliability and aesthetics of the composite panel in long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is a schematic diagram of the layer structure of the composite panel for instrument display of Example 1 of the application;

[0051] Figure 2 is a schematic diagram of the layer structure of the composite panel for instrument display of Example 3 of the application.

[0052] Explanation of reference signs: 1, transparent film; 2, anti-haze film; 3, pattern layer; 4, UV adhesive layer. DETAILED DESCRIPTION

[0053] The application will be further described in detail below in combination with the Figures 1-2 and examples.

[0054] Part of the raw material description:

[0055] The polyurethane acrylate is a six-functionality polyurethane acrylate, and the manufacturer is preferably Jining Fanghe Chemical Co., Ltd., model RJ423;

[0056] The viscosity-average molecular weight of the polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer is 5000-1000;

[0057] The epoxy-modified acrylate manufacturer model is preferably WDS-6225 of Jining Sunwisesun Biotechnology Co., Ltd.;

[0058] The ink is preferably the ink of brand and model G201 of Weiqiao (already containing photoinitiator) and aluminum powder in a weight ratio of 99:1; the UV adhesive is preferably the epoxy resin adhesive NK9008 of Nok.

[0059] Preparation example of polyurethane acrylate compound

[0060] Preparation example 1

[0061] A polyurethane acrylate compound is prepared by the following method:

[0062] Take 55% polyurethane acrylate, 10% methacrylate mono-end capped dimethyl polysiloxane, 30% methacryloyloxyethyl maleate monoester, 5% polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer by weight percentage, stir for 10 min at 100 r / min, to obtain polyurethane acrylate compound.

[0063] Preparation Example 2-3

[0064] Preparation Example 2-3 is different from Preparation Example 1 in that the amount of raw materials is different, as shown in Table 1.

[0065] Table 1 Raw material usage (%) of Preparation Examples 1-3

[0066]

[0067] Preparation Comparative Example

[0068] Preparation Comparative Example 1

[0069] Preparation Comparative Example 1 is different from Preparation Example 1 in that the methacrylate mono-end capped dimethyl polysiloxane is replaced by an equal amount of methacryloyloxyethyl maleate monoester.

[0070] Preparation Comparative Example 2

[0071] Preparation Comparative Example 2 is different from Preparation Example 1 in that the methacryloyloxyethyl maleate monoester is replaced by an equal amount of methacrylate mono-end capped dimethyl polysiloxane.

[0072] Preparation Comparative Example 3

[0073] Preparation Comparative Example 3 is different from Preparation Example 1 in that the polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer is replaced by an equal amount of polyurethane acrylate.

[0074] Preparation Comparative Example 4

[0075] Preparation Comparative Example 4 is different from Preparation Example 1 in that both the methacrylate mono-end capped dimethyl polysiloxane and the methacryloyloxyethyl maleate monoester are replaced by an equal amount of polyurethane acrylate.

[0076] Ink Preparation Example

[0077] Preparation Example 5

[0078] An ink is prepared by the following method:

[0079] Take 52% epoxy-modified acrylate, 25% polyurethane acrylate, 2% photoinitiator, 1% thermal initiator, 3% colorant, and active diluent by weight percentage, and place them into a stirring device, stir for 20 min at 100 r / min, to obtain an ink.

[0080] wherein the colorant is aluminum powder; the photoinitiator is Darocur 184, and the thermal initiator is benzoyl peroxide.

[0081] Preparation Example 6-7

[0082] Preparation Example 6-7 differs from Preparation Example 5 in that the amounts of the raw materials are different, as shown in Table 2.

[0083] Table 2 Amounts of Raw Materials for Inks of Preparation Examples 5-7

[0084] Raw materials Preparation Example 5 Preparation Example 6 Preparation Example 7 Epoxy-modified acrylate 52 40 58 Polyurethane acrylate 25 33 20 Photoinitiator 2 1 3 Thermal initiator 1 2 0.5 Colorant 1 1 1 Active diluent 19 23 17.5

[0085] Preparation Examples 8-14

[0086] Preparation Examples 8-14 differ from Preparation Example 5 in that the polyurethane acrylate is a polyurethane acrylate complex, and the source of the polyurethane acrylate complex is different in each of the preparation examples, as shown in Table 3.

[0087] Table 3 Sources of Polyurethane Acrylate Complexes for Preparation Examples 8-14

[0088]

[0089]

[0090] Preparation Example of UV Adhesive

[0091] Preparation Example 15

[0092] A UV adhesive was prepared by the following method:

[0093] 65% by weight of polyurethane acrylate, 3% by weight of photoinitiator, and 32% by weight of reactive diluent were weighed into a stirring device and mixed at a rotation speed of 100 r / min for 10 min to obtain the UV adhesive.

[0094] The photoinitiator was Darocur 184, and the reactive diluent was

[0095] Preparation Example 16

[0096] Preparation Example 16 differs from Preparation Example 15 in that the amounts of the raw materials are different, as follows:

[0097] 75% by weight of polyurethane acrylate, 2% by weight of photoinitiator, and 23% by weight of reactive diluent.

[0098] Preparation Example 17

[0099] Preparation Example 17 differs from Preparation Example 15 in that the amounts of the raw materials are different, as follows:

[0100] By weight, it contains 85% polyurethane acrylate, 1% photoinitiator, and 14% reactive diluent.

[0101] Preparation Examples 18-24

[0102] The difference between Preparation Examples 18-24 and Preparation Example 15 is that the sources of the polyurethane acrylate composites are different, and the sources of the polyurethane acrylate composites in each preparation example are different, as shown in Table 4.

[0103] Table 4. Sources of polyurethane acrylate composites in Preparation Examples 18-24

[0104] Preparation Example Source of polyurethane acrylate complex Preparation Example 18 Preparation Example 1 Preparation Example 19 Preparation Example 2 Preparation Example 20 Preparation Example 3 Preparation Example 21 Preparation Comparative Example 1 Preparation Example 22 Preparation Comparative Example 2 Preparation Example 23 Preparation Comparative Example 3 Preparation Example 24 Preparation Comparative Example 4

[0105] Example

[0106] Example 1

[0107] A composite panel for instrument display, such as Figure 1 As shown, the composite panel includes a transparent film 1 and an anti-glare film 2. A pattern layer 3 is provided on the side of the transparent film 1 near the anti-glare film 2. The transparent film 1 and the anti-glare film 2 are connected by a UV adhesive layer 4, and the side of the pattern layer 3 away from the anti-glare film 2 is fixedly connected to the UV adhesive layer 4. The manufacturing process of this composite panel for instrument display is as follows: Step A: Ink is printed on the surface of the transparent film using a screen printing device, and cured to form a pattern layer on its surface;

[0108] Step B: Apply UV adhesive to one side of the patterned layer of the transparent film to form an uncured UV adhesive layer on its surface;

[0109] Step C: The uncured UV adhesive layer side of the transparent film is conveyed by a conveying device to be bonded to the anti-glare film, rolled, and pressed at a pressure of 20N. Then it is transferred to a curing device for complete curing to obtain the composite material.

[0110] The ink is a commercially available ink; the UV adhesive is a commercially available UV adhesive.

[0111] The thickness of the transparent film is 0.1t; the thickness of the anti-glare film is 0.5t; the thickness of the UV adhesive layer is 0.5 micrometers (referring to the position that does not contact the surface of the pattern layer). The thickness of the pattern layer 3 from the side away from the anti-glare film 2 to the anti-glare film is 0.25 micrometers.

[0112] The curing degree in step A is complete curing, and the surface of the pattern layer is no longer sticky. The curing conditions are 70℃ and 30min.

[0113] The anti-glare film is made of brown PC film, while 92-93% is made of transparent PET film.

[0114] Example 2

[0115] Example 2 is different from Example 1 in that the thickness, process parameters are different, as follows:

[0116] The thickness of the transparent film is 0.15t; the thickness of the anti-vortex film is 0.5t; the thickness of the UV adhesive layer is 0.8 microns (referring to the position not in contact with the surface of the pattern layer). The thickness of the pattern layer 3 away from the anti-vortex film 2 to the anti-vortex film is 0.4 microns.

[0117] The degree of curing in Step A is complete curing, and the surface of the pattern layer has no adhesion, and the curing condition is 75℃, and the curing time is 25min

[0118] Example 3

[0119] Example 3 is different from Example 1 in that Figure 2 , the pattern layer 3 away from the transparent film 1 is fixedly bonded to the anti-vortex film 2.

[0120] and the degree of curing in Step A is semi-curing, and the pattern layer after curing has certain adhesion, and the curing condition is 70℃, and the curing time is 3min. The ink is the ink of Preparation Example 5, and the UV adhesive is the UV adhesive of Preparation Example 15. The thickness of the pattern layer is equal to the thickness of the UV adhesive layer.

[0121] Example 4

[0122] Example 4 is different from Example 1 in that the UV adhesive is the UV adhesive of Preparation Example 15.

[0123] Example 5

[0124] Examples 5-16 are different from Example 4 in that the sources of the ink and the UV adhesive are different, as shown in Table 5;

[0125] Table 5 Sources of ink and UV adhesive of Examples 4-16

[0126]

[0127] Comparative Example

[0128] Comparative Example 1

[0129] Comparative Example 1 is different from Example 1 in that the transparent film and the anti-vortex film are hot-pressed, and the pattern layer is located on the side of the transparent film away from the anti-vortex film, and the specific process is as follows:

[0130] The transparent film was laminated with the anti-dazzling film and preheated at 130℃ for 3 min, and then hot-pressed, the hot-pressing temperature of the side close to the anti-dazzling film was 180℃, the hot-pressing temperature of the side close to the transparent film was 230℃, the hot-pressing pressure was 30 MPa, and the hot-pressing time was 1 s. The obtained composite film was printed with ink on its surface, the ink was the same as that of Example 1, and then cured by the method of Example 1 to form an ink layer with the same thickness as the ink layer of Example 1. The thickness of the anti-dazzling film was 0.5t plus 0.5 microns.

[0131] Performance detection test

[0132] Detection method / test method

[0133] Peeling force test: the composite panels obtained in Examples 1-16 and Comparative Example 1 were tested according to GB / T 2792-1998, wherein one side of the anti-dazzling film of the composite panel was fixed on a test plate, and the transparent film on the composite panel was cut open with a knife to form a 1*1 mm area, and the cut open area did not contain the pattern layer, and the pattern layers on the test sample were the same size and evenly distributed, and the area ratio of the pattern layer to the UV adhesive layer was 1:15.

[0134] Aging test: the composite panels obtained in Examples 1-16 and Comparative Example 1 were subjected to aging treatment, the aging temperature was 85℃, the humidity was 85%, and the time was 3h, after taking out, it was placed in a 50℃ oven for drying for 2h, and the obtained sample parameters were tested by the above peeling force test. And calculate the peeling force residual rate, the peeling force residual rate is equal to the peeling force after aging test divided by the peeling force before aging test, and then multiplied by 100%.

[0135] Printed clarity: whether the pattern layer of the transparent film exists reflection, color development unclear phenomenon; using colorimeter for detection, compared with sample, when color difference value is less than 0.1, it is qualified, and greater than is unqualified;

[0136] The experimental data is shown in Table 6 as follows;

[0137] Table 6 Experimental data of Examples 1-16 and Comparative Example 1

[0138] Test item Peel force (g / inch) Peel force residual (%) Printed sharpness Example 1 2468 85.1 Pass Example 2 2472 85.2 Pass Example 3 2673 87.0 Pass Example 4 3014 90.6 Pass Example 5 3024 91.2 Pass Example 6 3018 90.7 Pass Example 7 3324 95.7 Pass Example 8 3350 96.7 Pass Example 9 3298 96.1 Pass Example 10 3189 93.2 Pass Example 11 3177 93.9 Pass Example 12 3214 94.5 Pass Example 13 3168 92.5 Pass Example 14 3235 94.2 Pass Example 15 3108 92.6 Pass Example 16 3116 93.1 Pass Comparative Example 1 1874 74.1 Pass

[0139] It can be seen from Examples 1 and Comparative Example 1 and Table 6 that the peeling force and peeling force residual of Example 1 are higher than those of Comparative Example 1, and the pattern layer of Example 1 is also observed to be clearer, which shows that the adhesion method using the UV lamination adhesive of the present application, thus making the composite panel have better structural stability, and the pattern layer is arranged between the transparent film layer and the anti-dazzling film, which does not need to directly contact the pattern layer during use, and has a better protection effect on the pattern layer, and avoids the possibility of falling off.

[0140] It can be seen from the combination of Example 1 and Example 3 and Table 6 that the peeling force and peeling force residue of Example 3 are both higher than those of Example 1, which indicates that the use of the ink and the UV laminating adhesive prepared in the present application and the combination of the ink and the process prepared in the present application make the composite panel composite structure more stable and reduce the possibility of falling off.

[0141] It can be seen from the combination of Example 3 and Example 4 and Table 6 that the peeling force and peeling force residue of Example 4 are both higher than those of Example 3, which indicates that the use of the ink prepared in the present application and the UV laminating adhesive prepared in the present application makes the composite panel layer structure stable and reduces the possibility of falling off.

[0142] It can be seen from the combination of Example 7, Example 4 and Examples 10-13 and Table 6 that the peeling force and peeling force residue of Examples 4 and 10-13 are both higher than those of Example 7, which indicates that the use of polyurethane acrylate, methyl methacrylate single-terminated dimethyl polysiloxane, methacryloyloxyethyl maleate and polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer in combination plays a synergistic role, further improves the stability of the composite panel layer structure, and has better temperature resistance and water resistance, reducing the possibility of falling off, cracking and the like during long-term use.

[0143] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A manufacturing process for a composite panel used in instrument displays, characterized in that, Includes the following steps: Step A: Print ink on the surface of the transparent film, cure it, and form a patterned layer on its surface; Step B: Apply UV adhesive to one side of the patterned layer of the transparent film to form an uncured UV adhesive layer on its surface; Step C: Lay the side of the uncured UV adhesive layer on the transparent film onto the anti-glare film, and allow it to fully cure to obtain the composite material; The ink is composed of the following raw materials by weight percentage: Epoxy-modified acrylate 40-58% Polyurethane acrylate 20-33% Photoinitiator 1-3% Thermal initiator 0.5-2% Pigment 0.1-5% The remainder is reactive diluent; The UV adhesive is composed of the following raw materials by weight percentage: Polyurethane acrylate 65-85% Photoinitiator 1-3% The remainder is reactive diluent; The polyurethane acrylate in the ink and the UV adhesive is a polyurethane acrylate composite, which is composed of the following raw materials by weight percentage: Polyurethane acrylate 48-65% 10-20% methacrylate mono-terminated dimethyl polysiloxane 10-30% Methacryloxyethyl maleate 5% of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer.

2. The manufacturing process of a composite panel for instrument display according to claim 1, characterized in that: The thickness of the transparent film is 0.05-0.15 mm; the thickness of the anti-glare film is 0.5-0.8 mm; and the thickness of the UV adhesive layer is 0.2-0.8 micrometers.

3. The manufacturing process of a composite panel for instrument display according to claim 1, characterized in that: The curing degree in step A is complete curing, and the surface of the pattern layer is no longer sticky. The curing conditions are 65-75℃ and the curing time is 25-35min.

4. The manufacturing process of a composite panel for instrument display according to claim 1, characterized in that: The reactive diluent in the UV adhesive and the reactive diluent in the ink are one or more of THFA diluent, NVP diluent, and HDDA diluent.

5. The manufacturing process of a composite panel for instrument display according to claim 1, characterized in that: The curing degree in step A is semi-curing. The cured pattern layer has a certain degree of adhesion. The curing conditions are 65-75℃ and the curing time is 2-5 minutes.

6. A composite panel for instrument display, manufactured using the production process of a composite panel for instrument display as described in any one of claims 1-5, characterized in that: It includes a transparent film and an anti-glare film. The transparent film has a patterned layer on the side close to the anti-glare film. The transparent film and the anti-glare film are connected by a UV adhesive layer.

7. A composite panel for instrument display according to claim 6, characterized in that: The side of the patterned layer away from the transparent film is fixedly bonded to the anti-glare film.

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