Glue capable of automatically displaying distribution state as well as preparation and use methods thereof

Abstract

The invention belongs to the technical field of glue measurement, and relates to glue capable of automatically displaying a distribution state as well as a preparation method and a use method of the glue, by adding a specific proportion of UV fluorescent powder into the glue, fluorescence display of the glue under ultraviolet irradiation is realized, and the glue is used for real-time monitoring of a gluing process. Compared with the prior art, the real-time fluorescence intensity detection device is utilized, the fluorescent powder is excited through the UV light source, fluorescence signals emitted by the fluorescent powder are captured, the coating path, thickness and uniformity are measured, analysis is carried out through the data processing unit, and coating abnormity is found in time. According to the technical scheme, the gluing quality and the production reliability can be remarkably improved, and the method is suitable for high-precision coating application scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of glue measurement, and relates to glue capable of self-displaying distribution state and a preparation and use method thereof. Background Art

[0002] As a key bonding material in the industrial and manufacturing fields, glue is widely used in scenarios such as electronic product assembly, automobile manufacturing, and medical equipment processing. Its discharge volume and distribution state are directly related to the bonding quality and the final performance of the product. If the amount of glue is insufficient during the gluing process, it will lead to a decrease in bonding strength and poor sealing, and it is easy to cause problems such as loose components and leakage; while excessive or unevenly distributed glue may not be completely cured and cause overflow, which not only affects the appearance of the product, but may also cause functional failure. In actual operation, traditional gluing methods mostly rely on experience judgment or indirect testing, which is difficult to achieve accurate real-time monitoring. This method can easily lead to the loss of control of the gluing process, uneven, excessive or insufficient situations, which not only increases rework and scrap rates, but may also affect production efficiency and material costs, and even reduce product stability and market competitiveness.

[0003] At present, in order to improve the quality of glue coating, some technologies try to use flow sensors or weight measurement methods to monitor the amount of glue discharged, but these methods have obvious shortcomings: on the one hand, they can usually only be measured before and after coating, and it is difficult to reflect the distribution status during the glue coating process in real time; on the other hand, these methods require the additional installation of complex sensors and data processing systems, which increases equipment costs and maintenance difficulties. In addition, for glues with special properties such as transparent or high-viscosity glues, traditional methods are less applicable in high-precision glue coating scenarios. To overcome the above problems, optical measurement technology has been developed in recent years. The glue coating situation is directly observed through a camera and calculated in combination with an AOI recognition algorithm. However, this technology is difficult to effectively distinguish when dealing with transparent glue or glue with a color similar to that of the substrate. At the same time, it is limited by lighting conditions and product form. Slight disturbances can affect the recognition accuracy, thereby reducing the reliability and applicability of the measurement.

[0004] Therefore, developing a new type of glue that can not only measure the glue coating amount in real time and accurately through optical means, but also accurately measure the dispensing status through optical data has become an urgent need to improve the quality of the glue coating process. Summary of the invention

[0005] The purpose of the present invention is to provide a glue that can self-display its distribution status and a method of using it. By improving the glue formula, it can exhibit fluorescent properties under UV light, taking into account both optical properties and bonding properties, and displaying the glue discharge amount and distribution status, thereby realizing real-time monitoring of the gluing process. It can be applied to a variety of industrial scenarios to meet the requirements of modern production lines for precision and efficiency.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A first aspect of the present invention provides a glue capable of self-displaying a distribution state, characterized in that it comprises a glue matrix and UV fluorescent powder distributed in the glue matrix.

[0008] The present invention improves the glue formula so that it exhibits fluorescent properties under UV light irradiation, thereby achieving real-time monitoring of the glue coating process. Specifically, the present invention adds a certain proportion of UV fluorescent powder to the glue, and uses the luminous properties of the fluorescent material under UV light irradiation of a specific wavelength to make the distribution state and discharge volume of the glue visually visible. Combined with optical detection equipment such as a spectrophotometer and a data processing algorithm, the glue coating situation can be captured in real time and accurately analyzed.

[0009] In some specific embodiments, the glue matrix is ​​a transparent or translucent glue matrix.

[0010] In some specific embodiments, the glue matrix is ​​selected from at least one of epoxy resin glue (EP), acrylic glue (AA), polyurethane glue (PU), silicone glue (SI), UV curing glue (UV), hot melt glue (HM), vinyl glue (VA) or acrylate glue (MA), and has high temperature resistance, UV resistance and aging resistance.

[0011] In some specific embodiments, the UV phosphor is a phosphor that can emit strong visible light under specific UV light, and can be specifically selected from UV-A (320-400nm) excited phosphor, UV-B (280-320nm) excited phosphor or UV-C (100-280nm) excited phosphor. The main body is a colorless or white powder, which is suitable for mixing in glue.

[0012] In some specific embodiments, the mass ratio of the glue matrix to the UV phosphor is 20:(1-6).

[0013] The second aspect of the present invention provides a method for preparing glue capable of self-displaying distribution state, comprising: mixing a glue matrix with UV fluorescent powder.

[0014] In some specific embodiments, the mixing method used is selected from at least one of mechanical stirring, centrifugal dispersion or ultrasonic mixing. Through efficient mixing, dispersion and homogenization, the phosphor is evenly distributed in the matrix, thereby ensuring the stability of the fluorescent performance and the quality of the final product.

[0015] In some specific embodiments, when the mixing device used is a stirrer, the stirring speed is 30 to 80 rad / min, and the stirring time is 20 to 40 min.

[0016] A third aspect of the present invention provides a method for using glue that can self-display distribution status, comprising the following steps:

[0017] S1: applying glue on the substrate to form a glue area;

[0018] S2: Use an ultraviolet light source to irradiate the glue area, and use a fluorescence intensity detector to detect the fluorescence intensity and distribution of the glue in real time.

[0019] In some specific embodiments, step S1 is used to evenly coat the glue on the surface of the target substrate, wherein the coating method includes at least one of spray coating, roller coating, blade coating, dispensing coating or extrusion coating.

[0020] In some specific embodiments, in step S2, the ultraviolet light source is used to excite the fluorescent powder contained in the glue to make it emit fluorescence of a specific wavelength.

[0021] The fluorescence intensity detector captures the visible light signal in the fluorescence, measures its intensity distribution, and transmits the signal to the data processing unit for analysis. Through real-time monitoring and calculation of visible light intensity, the coating path, thickness and uniformity of the glue can be accurately determined, and problems such as uneven coating or missing coating can be discovered in time, thereby effectively improving the coating quality and production reliability.

[0022] Specifically, the fluorescence intensity detector is selected from at least one of a photometer, a spectrophotometer, a spectrometer, a photomultiplier tube or an optical camera.

[0023] In some specific embodiments, in step S2, the ultraviolet light source and the fluorescence intensity detector are located above both sides of the glue area and form an angle of 10° to 60° with the glue area.

[0024] In some specific embodiments, in step S2, the ultraviolet light source is directed toward the glue area parallel to the substrate surface, and the fluorescence intensity detector is directed toward the glue area perpendicular to the substrate surface.

[0025] The present invention relates to a technology for improving the glue formula and integrating UV fluorescent powder into the glue, that is, by adding a specific proportion of UV fluorescent powder into the glue, the fluorescent appearance of the glue under ultraviolet light is realized, which is used for real-time monitoring of the glue coating process. The glue matrix adopts a transparent or translucent material (such as polycarbonate or acrylic resin) with high temperature resistance, UV resistance and anti-aging performance; the fluorescent powder selects a colorless or white powder form, which can emit bright visible light under a specific wavelength of UV light. In order to ensure the uniformity of the distribution of the fluorescent powder, the present invention adopts high-efficiency dispersing equipment such as mechanical stirring, centrifugal stirring or ultrasonic dispersion for mixing. Combined with a precision glue coating system, the glue coating process is accurately managed by controlling the glue discharge amount, path and speed. At the same time, a real-time fluorescence intensity detection device is used to excite the fluorescent powder through a UV light source and capture the fluorescent signal emitted by it, measure the coating path, thickness and uniformity, and analyze it through a data processing unit to timely discover coating abnormalities. This technical solution can significantly improve the quality of glue coating and production reliability, and is suitable for high-precision coating application scenarios.

[0026] Compared with the prior art, the present invention has the following characteristics:

[0027] 1) Innovative fusion of fluorescent powder and glue: UV fluorescent powder is directly integrated into the glue, so that the glue exhibits fluorescent properties under UV light. This design can make the distribution state of the glue coating process visually intuitive and clear, solving the problem that it is difficult to detect the discharge amount and distribution state of traditional glue with the naked eye.

[0028] 2) Improved anti-UV performance of glue: UV fluorescent powder is directly integrated into the glue, so that the glue can convert ultraviolet light into visible light. Since ultraviolet light is absorbed and converted by the fluorescent powder, the damage to the glue is reduced, which can significantly improve the anti-UV performance of the glue.

[0029] 3) Improve UV curing efficiency: UV phosphors can absorb ultraviolet (UV) light and re-emit visible light, which can increase the activation efficiency of visible light initiators in the glue. In this way, the glue can be effectively cured under low UV light irradiation, which helps to ensure that even areas where UV light is difficult to reach can obtain a certain amount of light energy, thereby ensuring uniform curing. For objects with complex shapes or thick coatings, the addition of phosphors can greatly improve the depth and uniformity of curing.

[0030] 4) Real-time monitoring and intelligent analysis: Through optical detection equipment (such as photometer) combined with image processing algorithms, the real-time capture and analysis of the fluorescence intensity distribution during the glue coating process can be achieved. This technology can automatically detect the glue coating quality on the production line, thereby reducing the error of manual detection.

[0031] 5) Efficient and uniform dispersion process: Use advanced technologies such as ultrasonic dispersion to evenly distribute the phosphor in the glue matrix, and use vacuum degassing technology to improve the uniformity and stability of the glue to avoid particle agglomeration and bubble influence.

[0032] 6) Precise control of coating system: The glue coating system is combined with a precision control algorithm to achieve precise control of the discharge volume, speed and path to ensure the uniformity and quality of coating.

[0033] 7) Multifunctional optical detection system: The detection system includes UV light source, optical lens, sensor and data processing module, which can capture fluorescence intensity and distribution status at the same time, providing all-round guarantee for glue coating quality.

[0034] 8) Full-process closed-loop optimization: From glue preparation, coating to testing, the entire process forms a closed-loop feedback through fluorescence characteristics and real-time monitoring, which can adjust coating parameters in time to improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a detectable UV spectrum of the UV fluorescent powder used in Example 1.

[0036] Figure 2 This is a spectrum diagram of the visible light band emitted by the UV phosphor used in Example 1.

[0037] Figure 3 This is a visible light spectrum diagram when no UV phosphor is added to the glue in Example 1.

[0038] Figure 4 Schematic diagram of the structure of the glue distribution state detection equipment used in Example 1.

[0039] Figure 5 This is a schematic diagram of the structure of the glue distribution state detection equipment used in Example 14.

[0040] Figure 6 This is a schematic diagram of the structure of the glue distribution state detection equipment used in Example 15.

[0041] Figure 7 This is a schematic diagram of the structure of the glue distribution status detection equipment used in Example 16.

[0042] Figure 8 This is a schematic diagram of the structure of the glue distribution status detection equipment used in Example 17.

[0043] Description of the markings in the figure:

[0044] 1- glue area; 2- UV LED; 3- photometer; 4- spectrometer; 5- optical fiber; 6- spectrometer probe; 7- photomultiplier tube; 8- optical camera. DETAILED DESCRIPTION

[0045] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] A glue capable of self-displaying distribution state and a method for using the glue, comprising:

[0047] 1. Glue and UV fluorescent powder:

[0048] The glue uses a transparent or translucent glue matrix (such as epoxy resin glue (EP), acrylic glue (AA)) with high temperature resistance, UV resistance and anti-aging properties. The fluorescent powder is selected to be able to stimulate strong visible light under specific UV light, and the main body is a colorless or white powder, which is suitable for mixing in glue.

[0049] 2. Phosphor dispersion equipment:

[0050] Phosphor dispersion equipment is a device specially used to evenly disperse phosphor into a matrix (such as glue, paint or resin). Its purpose is to evenly distribute the phosphor in the matrix through efficient mixing, dispersion and homogenization, thereby ensuring the stability of the fluorescent performance and the quality of the final product. The main methods of dispersing phosphors include mechanical stirring, centrifugal stirring, ultrasonic dispersion and other methods.

[0051] 3. Glue coating system:

[0052] The glue coating system is a device used to evenly coat glue on the target surface. The system usually consists of a glue storage device, a delivery pipeline, a coating nozzle and a control unit. The glue is transported from the storage device to the nozzle through a pressure pump or a pneumatic device, and combined with a precise control algorithm, precise control of the coating path, glue output and speed can be achieved.

[0053] 4. Real-time fluorescence intensity detection

[0054] The real-time fluorescence intensity detection part is mainly composed of a light source, an optical lens, a visible light sensor, and a data processing unit. The light source is UV light, which is used to excite the fluorescent powder contained in the glue to emit fluorescence of a specific wavelength. The visible light sensor captures the visible light signal in the fluorescence through the optical lens, measures its intensity distribution, and transmits the signal to the data processing unit for analysis. Through real-time monitoring and calculation of the visible light intensity, the coating path, thickness and uniformity of the glue can be accurately determined, and problems such as uneven coating or missing coating can be discovered in time, thereby effectively improving the coating quality and production reliability.

[0055] How it works

[0056] 1. Mix UV fluorescent powder and glue:

[0057] The process of mixing UV phosphor with glue is designed to achieve uniform distribution of phosphor particles in the glue, ensuring a stable fluorescence response under UV light. First, add the phosphor to the base glue in proportion, mix it preliminarily by stirring at a low speed, and then use equipment such as a blender or ultrasonic disperser to disperse it efficiently to prevent particle agglomeration. After mixing, remove bubbles by vacuum degassing, test the strength, uniformity and stability of the fluorescent glue, and finally seal it for storage to ensure consistent performance during coating and real-time optical inspection.

[0058] 2. Glue coating:

[0059] The glue coating process is a key step to evenly coat the glue with specific functions on the target surface to meet the bonding or functional requirements. The process usually includes three main stages: glue preparation, coating control and curing treatment. First, the glue is fully mixed and degassed with the phosphor to ensure its uniformity and stability; then the glue is accurately coated on the surface of the substrate by a dispensing machine, scraper or spraying equipment. The coating process can use flow control and visual monitoring systems to ensure the accuracy of the discharge volume and distribution state; finally, according to the characteristics of the glue, it is cured at room temperature or by heating, UV light, etc., so that the glue forms a firm bond with the substrate, while avoiding problems such as bubbles, offset or uneven thickness during the coating process.

[0060] 3. Real-time fluorescence intensity detection

[0061] The real-time fluorescence intensity detection process is a precise detection method for monitoring the quality of glue coating. Its core steps include fluorescence light source excitation, signal acquisition and processing, and data analysis. First, during the coating process, the fluorescent powder in the glue is excited by a UV light source to emit a fluorescence signal of a specific visible light wavelength; then, the detection system uses a highly sensitive optical sensor (such as a photometer) to capture the intensity and distribution of visible light and transmit the signal to the data processing module; finally, the algorithm analyzes the fluorescence uniformity, intensity change, and coverage status of the coating area to evaluate the glue discharge and distribution quality in real time.

[0062] How it works

[0063] 1. Mix UV fluorescent powder and glue:

[0064] The process of mixing UV phosphor with glue is designed to achieve uniform distribution of phosphor particles in the glue, ensuring a stable fluorescence response under UV light. First, add the phosphor to the base glue in proportion, mix it preliminarily by stirring at a low speed, and then use equipment such as a blender or ultrasonic disperser to disperse it efficiently to prevent particle agglomeration. After mixing, remove bubbles by vacuum degassing, test the strength, uniformity and stability of the fluorescent glue, and finally seal it for storage to ensure consistent performance during coating and real-time optical inspection.

[0065] 2. Glue coating:

[0066] The glue coating process is a key step to evenly coat the glue with specific functions on the target surface to meet the bonding or functional requirements. The process usually includes three main stages: glue preparation, coating control and curing treatment. First, the glue is fully mixed and degassed with the phosphor to ensure its uniformity and stability; then the glue is accurately coated on the surface of the substrate by a dispensing machine, scraper or spraying equipment. The coating process can use flow control and visual monitoring systems to ensure the accuracy of the discharge volume and distribution state; finally, according to the characteristics of the glue, it is cured at room temperature or by heating, UV light, etc., so that the glue forms a firm bond with the substrate, while avoiding problems such as bubbles, offset or uneven thickness during the coating process.

[0067] 3. Real-time fluorescence intensity detection

[0068] The real-time fluorescence intensity detection process is a precise detection method for monitoring the quality of glue coating. Its core steps include fluorescence light source excitation, signal acquisition and processing, and data analysis. First, during the coating process, the fluorescent powder in the glue is excited by a UV light source to emit a fluorescence signal of a specific visible light wavelength; then, the detection system uses a highly sensitive optical sensor (such as a photometer) to capture the intensity and distribution of visible light and transmit the signal to the data processing module; finally, the algorithm analyzes the fluorescence uniformity, intensity change, and coverage status of the coating area to evaluate the glue discharge and distribution quality in real time.

[0069] In this technical solution, the glue that can self-display the distribution state and the method of using it have the characteristics of accurate measurement, high real-time performance, and quantifiable evaluation.

[0070] In some specific embodiments, a glue capable of self-displaying distribution state has the characteristics of accurate measurement, high real-time performance, and quantifiable evaluation, and its production method and use method include the following steps:

[0071] 1) Choose transparent or translucent glue. Make sure the UV phosphor can be evenly distributed in the glue and has good optical and bonding properties;

[0072] 2) Select fluorescent powder suitable for UV light and ensure that it can emit visible light under UV light; ensure that the fluorescent powder has high luminous efficiency and is compatible with the selected glue material;

[0073] 3) Using the phosphor dispersion process, the phosphor is mixed with the glue and vacuum degassed;

[0074] 4) Load the degassed glue into the glue coating system;

[0075] 5) Use a coating system to evenly coat the glue on the substrate;

[0076] 6) The real-time fluorescence intensity detection probe follows the coating system for detection;

[0077] 7) Input the detected visible light data into the computer for processing to determine whether there is a lack of glue, glue leakage or other defects.

[0078] This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0079] The following are more detailed implementation cases, which further illustrate the technical solutions of the present invention and the technical effects that can be obtained.

[0080] In the following examples, unless otherwise specified, raw materials, reagents or processing techniques are all conventional commercial products or conventional processing techniques in the art.

[0081] In the following examples, the UV phosphor was prepared according to the preparation method of 2LiY20Ag phosphor in the literature Luminescence Control of Silver Nanoclusters by Tailoring Extra-Framework Cations in FAU-Y Zeolite: Implications for Tunable Emission, ACS Appl. Nano Mater., 4, 13692-13699, (2021).

[0082] The UV LED model is PCF-10-V1.

[0083] The epoxy resin glue (EP) model is ResinLab EP750 A / B transparent.

[0084] The model of polyurethane glue (PU) is HL-9050A / B.

[0085] The silicone (SI) model is LOCTITE SI 5088.

[0086] The UV curing glue (UV) model is XG-D1410.

[0087] Hot melt adhesive (HM) model is Dow DOWSIL TM HM-2600.

[0088] The model of vinyl glue (VA) is EVA VA930 19-400.

[0089] The model of acrylic glue (MA) is LOCTITE 3189UV.

[0090] The glass substrate is KK3 high-aluminum glass produced by China Southern Glass Group Co., Ltd.

[0091] The mixer model is Vd-30s produced by Shanghai Danshun Industrial Co., Ltd.

[0092] The centrifuge model is TP-5 produced by Henan Beihong Industrial Co., Ltd.

[0093] The ultrasonic mixer model is JH1500-20 produced by Hangzhou Jinghao Machinery Co., Ltd.

[0094] The spray coating system model is SATAjet 1000B.

[0095] The roller coating system model is DEK Horizon 03iX.

[0096] The blade coating system model is Yasui Seiki TC-200.

[0097] The dispensing and coating system model is Nordson EFD Ultimus V.

[0098] The extrusion coating system model is ITW Dynatec Dynamini.

[0099] The photometer model is Konica Minolta CL-200A.

[0100] The spectrometer model is Ocean Insight FLAME-S-VIS-NIR.

[0101] The photomultiplier tube model was ET Enterprises 9111.

[0102] The optical camera model is Sony Pregius IMX250.

[0103] Embodiment 1:

[0104] A glue capable of self-displaying distribution state, the preparation method of which comprises the following steps:

[0105] A1: Mix epoxy resin glue (EP) and UV phosphor in a mass ratio of 100:9; the UV spectrum and visible light spectrum of the UV phosphor are as follows: Figure 1 and Figure 2 As shown; the visible light spectrum of epoxy resin glue (EP) without UV phosphor is as follows Figure 3 As shown;

[0106] A2: The mixed glue is put into a glue mixer, the speed is set to 60 rad / min, and stirred for 30 minutes to obtain glue that can self-display the distribution state.

[0107] A method of using the above glue, such as Figure 4 As shown, the following steps are included:

[0108] B1: Put the glue into the spray coating system and spray it on the glass substrate to form glue area 1;

[0109] B2: Place UV LED 2 and photometer 3 symmetrically above both sides of glue area 1, with an angle of 45° relative to glue area 1;

[0110] B3: Move the UV LED 2 and the photometer 3 along the glue area 1 and inspect;

[0111] B4: Input the data collected by photometer 3 into the computer. If the photometer has brightness readings in the visible light band and the brightness value is greater than 1cd / m 2 , then it is normal.

[0112] Embodiment 2:

[0113] A glue capable of self-displaying distribution state, the preparation method thereof is different from that of Example 1 in that:

[0114] In step A1, the epoxy resin glue (EP) is replaced with polyurethane glue (PU) of equal mass.

[0115] The rest is the same as in Example 1.

[0116] Embodiment 3:

[0117] A glue capable of self-displaying distribution state, the preparation method thereof is different from that of Example 1 in that:

[0118] In step A1, the epoxy resin glue (EP) is replaced with an equal mass of silicone glue (SI).

[0119] The rest is the same as in Example 1.

[0120] Embodiment 4:

[0121] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0122] In step A1, the epoxy resin glue (EP) is replaced with an equal mass of UV curing glue (UV).

[0123] The rest is the same as in Example 1.

[0124] Embodiment 5:

[0125] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0126] In step A1, the epoxy resin glue (EP) is replaced with an equal mass of hot melt glue (HM).

[0127] The rest is the same as in Example 1.

[0128] Embodiment 6:

[0129] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0130] In step A1, the epoxy resin glue (EP) is replaced with an equal mass of vinyl glue (VA).

[0131] The rest is the same as in Example 1.

[0132] Embodiment 7:

[0133] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0134] In step A1, the epoxy resin glue (EP) is replaced with an equal mass of acrylic glue (MA).

[0135] The rest is the same as in Example 1.

[0136] Embodiment 8:

[0137] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0138] In step A2, the mixer was replaced with a centrifuge, set to 900 r / min, and centrifuged for 10 min.

[0139] Embodiment 9:

[0140] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0141] In step A2, the stirrer was replaced with an ultrasonic mixer, set to 180 r / min, and mixed for 10 min.

[0142] Embodiment 10:

[0143] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0144] In step B1, the spray coating system is replaced with a roller coating system.

[0145] Embodiment 11:

[0146] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0147] In step B1, the spray coating system is replaced with a blade coating system.

[0148] Embodiment 12:

[0149] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0150] In step B1, the spray coating system is replaced with a dispensing coating system.

[0151] Embodiment 13:

[0152] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0153] In step B1, the spray coating system is replaced with an extrusion coating system.

[0154] Embodiment 14:

[0155] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0156] In steps B2 to B4, if Figure 5 As shown, the photometer 3 is replaced by a spectrometer 4 and a spectrometer probe 6 connected by an optical fiber 5. The spectrometer probe 6 is symmetrically arranged with the UV LED 2 and moved along the glue area 1 for inspection.

[0157] Embodiment 15:

[0158] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0159] In steps B2 to B4, if Figure 6 As shown, the photometer 3 is replaced by a photomultiplier tube 7 .

[0160] Embodiment 16:

[0161] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0162] In steps B2 to B4, if Figure 7 As shown, the photometer 3 is replaced by an optical camera 8 .

[0163] Embodiment 17:

[0164] A glue capable of self-displaying distribution state, the preparation method and use method of which are different from those of Example 1, except that:

[0165] In step B2, if Figure 8 As shown, the UV LED 2 and the photometer 3 are placed vertically opposite to each other, that is, the UV LED 2 is parallel to the surface of the substrate and points to the glue area 1, and the photometer 3 is vertically pointed to the glue area 1. This can save machine layout space and detect the bonding condition between the glue and the substrate.

[0166] Embodiment 18:

[0167] A glue capable of self-displaying distribution state, the preparation method of which comprises the following steps:

[0168] A1: Mix epoxy resin glue (EP) and UV phosphor in a mass ratio of 100:9; the UV spectrum and visible light spectrum of the UV phosphor are as follows: Figure 1 and Figure 2 As shown;

[0169] A2: The mixed glue is put into a glue mixer, the speed is set to 60 rad / min, and stirred for 30 minutes to obtain glue that can self-display the distribution state.

[0170] A method for using the above glue comprises the following steps:

[0171] B1: Put the glue into the spray coating system and spray it on the glass substrate to form glue area 1;

[0172] B2: Cover the sprayed area with another glass substrate;

[0173] B3: Place UV LED 2 and photometer 3 symmetrically above the glue area 1 on both sides, with the angle formed relative to the glue area 1 being 45°. Figure 3 As shown;

[0174] B4: Move the UV LED 2 and the photometer 3 along the glue area 1 and inspect;

[0175] B5: Input the data collected by photometer 3 into the computer. If the photometer has brightness readings in the visible light band and the brightness value is greater than 1cd / m 2 , then it is normal.

[0176] B6: Place the bonded substrates into a high temperature curing oven, with the curing temperature at 80°C and the curing time at 2 hours.

[0177] B7: After curing, the bonded glass can emit green light under ultraviolet light, which can absorb ultraviolet light and reduce the damage of ultraviolet light to the glue.

[0178] Embodiment 19:

[0179] A glue capable of self-displaying distribution state, the preparation method of which comprises the following steps:

[0180] A1: Mix epoxy resin glue (EP) and UV phosphor in a mass ratio of 100:9; the UV spectrum and visible light spectrum of the UV phosphor are as follows: Figure 1 and Figure 2 As shown;

[0181] A2: The mixed glue is put into a glue mixer, the speed is set to 60 rad / min, and stirred for 30 minutes to obtain glue that can self-display the distribution state.

[0182] A method for using the above glue comprises the following steps:

[0183] B1: Spray glue on the surface of the electronic product shell to form a glue layer;

[0184] B2: Use ultraviolet light to irradiate the glue surface and observe the morphology of the green luminous area on the glue surface;

[0185] B3: Detect the intensity of green light and compare it with the standard value to ensure that the coating quality of the glue meets the requirements;

[0186] B4: Perform curing treatment at a temperature of 80°C for 2 hours.

[0187] B5: After curing, the glue forms a protective layer on the surface of the electronic components, which can not only protect the electronic components from damage by external UV light, but also protect the glue itself from the effects of UV light.

[0188] The invention adds a certain proportion of UV fluorescent powder to the glue, and uses the luminous characteristics of the fluorescent material under UV light of a specific wavelength to make the distribution state and discharge amount of the glue clearly visible visually. Combined with optical detection equipment such as a spectrophotometer and a data processing algorithm, the glue coating situation can be captured in real time and accurately analyzed.

[0189] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A glue capable of self-displaying distribution state, characterized in that: It includes a glue matrix and UV fluorescent powder distributed in the glue matrix.

2. The glue capable of self-displaying distribution state according to claim 1, characterized in that: The glue matrix is ​​a transparent or translucent glue matrix.

3. The glue capable of self-displaying distribution state according to claim 2, characterized in that: The glue matrix is ​​selected from at least one of epoxy glue, acrylic glue, polyurethane glue, silicone glue, UV curing glue, hot melt glue, vinyl glue or acrylate glue; and / or, The UV phosphor is selected from one of UV-A excited phosphor, UV-B excited phosphor or UV-C excited phosphor.

4. The glue capable of self-displaying distribution state according to claim 1, characterized in that: The mass ratio of the glue matrix to the UV fluorescent powder is 20:(1-6).

5. A method for preparing the glue according to any one of claims 1 to 4, characterized in that: include: The glue matrix is ​​mixed with UV fluorescent powder.

6. The method for preparing glue according to claim 5, characterized in that: The mixing method used is selected from at least one of mechanical stirring, centrifugal dispersion or ultrasonic mixing.

7. The glue capable of self-displaying distribution state according to claim 6, characterized in that: When the mixing device used is a stirrer, the stirring speed is 30 to 80 rad / min, and the stirring time is 20 to 40 min.

8. A method for using the glue according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: applying glue on a substrate to form a glue area (1); S2: Use an ultraviolet light source to irradiate the glue area (1), and use a fluorescence intensity detector to detect the fluorescence intensity and distribution of the glue in real time.

9. The method for using the glue according to claim 8, characterized in that: In step S1, the coating method includes at least one of spray coating, roller coating, blade coating, dispensing coating or extrusion coating; In step S2, the fluorescence intensity detector is selected from at least one of a photometer, a spectrophotometer, a spectrometer, a photomultiplier tube or an optical camera.

10. The method for using the glue according to claim 8, characterized in that: In step S2, the ultraviolet light source and the fluorescence intensity detector are located above both sides of the glue area (1) and form an angle of 10° to 60° with the glue area (1); or, The ultraviolet light source is parallel to the substrate surface and points toward the glue area (1), and the fluorescence intensity detector is perpendicular to the substrate surface and points toward the glue area (1).

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