CN108363224B - Glass backboard preparation process, glass backboard and metal frame attaching process - Google Patents
Glass backboard preparation process, glass backboard and metal frame attaching process Download PDFInfo
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- CN108363224B CN108363224B CN201810147169.8A CN201810147169A CN108363224B CN 108363224 B CN108363224 B CN 108363224B CN 201810147169 A CN201810147169 A CN 201810147169A CN 108363224 B CN108363224 B CN 108363224B
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- screen printing
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3405—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of organic materials
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133331—Cover glasses
Abstract
The invention relates to the technical field of liquid crystal display, and discloses a glass back plate preparation process, a glass back plate and a metal frame attaching process; the preparation process of the glass back plate comprises the following steps: s1, processing the shape of the glass to be processed; s2, carrying out primary silk-screen printing, namely silk-screen printing of a first ink layer on one surface of the processed glass; s3, tempering and quenching, namely tempering the glass after primary screen printing, and quenching the first ink layer after primary screen printing; s4, performing secondary silk-screen printing, namely silk-screen printing a second ink layer on the quenched first ink layer; and S5, setting an explosion-proof membrane, and setting a layer of explosion-proof membrane on the second ink layer on the glass after the secondary screen printing. The tempering and quenching treatment increases the surface stress and the impact strength of the glass back plate and improves the adhesive force of the first ink layer; the first ink layer and the second ink layer increase the optical density of the glass back plate, and the problem of light transmission of the glass back plate is solved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a glass back plate preparation process, a glass back plate and a metal frame attaching process.
Background
With the popularization of liquid crystal televisions and the demand of consumers for high-quality television sets, the traditional metal back plate cannot meet the demand of consumers. The glass back plate has the characteristics of good smoothness, light weight, thinness, cleanness, anti-glare property, good weather resistance and the like, the high color value of the glass back plate gives high-end ornamental perception to people, and the glass back plate used on high-end products of liquid crystal televisions is a trend in the future.
At present, manufacturers applying the glass back plate to liquid crystal televisions have a lot of fingers. Because glass is fragile and poor in impact resistance, the back plate is difficult to process in light transmission when used on a liquid crystal television. Meanwhile, the glass cannot be punched, riveted and welded. The above difficulties all limit the use of the glass backplane in the lcd tv.
Therefore, a glass backplane manufacturing process, a glass backplane and a metal frame attaching process are needed to solve the above technical problems.
Disclosure of Invention
The first objective of the present invention is to provide a process for manufacturing a glass backplane, wherein the manufactured glass backplane as a module backplane does not leak light and has a high-end visual effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation process of a glass backboard comprises the following steps:
s1, processing the shape of the glass to be processed;
s2, carrying out primary silk-screen printing, namely silk-screen printing of a first ink layer on one surface of the processed glass;
s3, tempering and quenching, namely tempering the glass after primary screen printing, and quenching the first ink layer after primary screen printing;
s4, performing secondary silk-screen printing, namely silk-screen printing a second ink layer on the quenched first ink layer;
and S5, setting an explosion-proof membrane, and setting a layer of explosion-proof membrane on the second ink layer on the glass after the secondary screen printing.
Polishing the periphery of the glass to be processed to remove edges and corners; the tempering and quenching treatment increases the surface stress and the impact strength of the glass back plate and improves the adhesive force of the first ink layer; the first ink layer and the second ink layer increase the optical density of the glass back plate, and the problem of light transmission of the glass back plate is solved; the explosion-proof film is arranged, so that the explosion-proof characteristic of the glass back plate is improved, and the use safety is improved.
Preferably, the printing ink on the first printing ink layer is high-temperature printing ink, the printing ink on the second printing ink layer is low-temperature printing ink, the area of the second printing ink layer is smaller than that of the first printing ink layer, and the second printing ink layer and the first printing ink layer are arranged in a shape of a Chinese character 'hui'. The characteristic of few pinholes of low-temperature ink is utilized to make up the problem that the high-temperature ink is easy to generate pinholes; the area of the second printing ink layer is not silk-screened by the first printing ink layer, the pasting area is high-temperature printing ink, the adhesive force is high, and the problem that the pasting part is easy to peel off from the printing ink layer due to the fact that low-temperature printing ink is used in the pasting area is solved.
Preferably, before step S3, the method further includes: preheating the glass after primary screen printing in a tunnel furnace at 160-180 deg.C (such as 160 deg.C, 165 deg.C, 168 deg.C, 170 deg.C, 173 deg.C, 178 deg.C, 180 deg.C) for 15-20 min (such as 15min, 16min, 17min, 18min, 19min, 20 min).
Preferably, step S3 is performed in a tempering furnace, the temperature in the furnace is 600 ℃ to 700 ℃ (for example, 600 ℃, 615 ℃, 635 ℃, 650 ℃, 670 ℃, 685 ℃, 700 ℃, etc.), the quenching time is 100S to 150S (for example, 100S, 110S, 118S, 125S, 133S, 140S, 143S, 148S, 150S, etc.), and the surface stress of the side of the tempered glass far away from the first ink layer should be between 60MPa and 90 MPa.
Preferably, the optical density of the glass after the primary screen printing is not lower than 3.8 (such as 3.8, 3.9, 4.0, 4.1, 4.2 and the like); the optical density of the glass after the secondary silk-screen printing is not lower than 4.8 (such as 4.8, 4.9, 5.0, 5.1, 5.2 and the like).
Preferably, the explosion-proof membrane is a PET (polyethylene terephthalate) thin film, and is bonded to the surface of the second ink layer through an acrylic adhesive.
The second objective of the present invention is to provide a glass backplane, which is a module backplane without light leakage and has a high-end visual effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the glass back plate is prepared by the glass back plate preparation process, the glass back plate comprises tempered glass, a first ink layer is arranged on one surface of the tempered glass, a second ink layer is arranged on one side, away from the tempered glass, of the first ink layer, and the explosion-proof membrane is arranged on one side, away from the first ink layer, of the second ink layer. The first ink layer and the second ink layer increase the optical density of the glass back plate, and the problem of light transmission of the glass back plate is solved; the explosion-proof film is arranged, so that the explosion-proof characteristic of the glass back plate is improved, and the use safety is improved.
Preferably, toughened glass's thickness is 3mm, the thickness of first printing ink layer is 0.01mm, the thickness of second printing ink layer is 0.01mm, the thickness of rupture membrane is 0.075 mm.
The third purpose of the invention is to provide a metal frame attaching process which is simple to operate and can tightly fix a metal frame on a glass back plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the metal frame attaching process adopts the glass back plate prepared by the glass back plate preparation process, the area of the first ink layer on the glass back plate, on which the second ink layer is not silk-screened, is a pasting area, and the metal frame is pasted on the pasting area.
Preferably, the metal frame is bonded to the bonding area through acrylic acid AB structural adhesive, a first groove is formed in the bonding surface of the metal frame, and the volume ratio of the adhesive A to the adhesive B in the acrylic acid AB structural adhesive is 10: 1;
pressure maintaining, wherein the pressure maintaining jig maintains the pressure of the metal frame and the glass back plate in the pasting process, and the pressure value of the pressure maintaining is 40g/mm2；
Heating and curing, namely placing the metal frame and the glass back plate after pressure maintaining in a tunnel furnace for heating and curing, wherein the heating temperature is 60-70 ℃ (for example, 60 ℃, 62 ℃, 63 ℃, 65 ℃, 67 ℃, 68 ℃, 70 ℃ and the like), and the heating time is 3-5 min (for example, 3min, 3.2min, 3.5min, 3.8min, 4min, 4.2min, 4.5min, 4.8min, 5min and the like);
and standing and maintaining, namely standing and maintaining the heated and cured metal frame and the glass back plate for 24 hours at room temperature.
The first groove arranged on the pasting surface of the metal frame and the pasting area form a cavity, so that the glue cannot flow out of the cavity, and the overall pasting strength of the frame can be ensured; the optimal bonding strength between the metal frame and the glass back plate can be ensured by heating, curing and standing.
The invention has the beneficial effects that: polishing the periphery of the glass to be processed to remove edges and corners; the tempering and quenching treatment increases the surface stress and the impact strength of the glass back plate and improves the adhesive force of the first ink layer; the first ink layer and the second ink layer increase the optical density of the glass back plate, and the problem of light transmission of the glass back plate is solved; the explosion-proof film is arranged, so that the explosion-proof characteristic of the glass back plate is improved, and the use safety is improved.
In addition, the characteristic of less pinholes of low-temperature ink is utilized to make up the problem that the pinholes are easy to generate in high-temperature ink; the area of the first ink layer where the second ink layer is not silk-screened is high-temperature ink, so that the adhesive force is high, and the problem that the adhesive part is easy to peel off from the ink layer due to the fact that the adhesive area uses low-temperature ink is solved;
the first groove arranged on the pasting surface of the metal frame and the pasting area form a cavity, so that the glue cannot flow out of the cavity, and the overall pasting strength of the frame can be ensured; the optimal bonding strength between the metal frame and the glass back plate can be ensured by heating, curing and standing.
Drawings
FIG. 1 is a schematic structural diagram of a glass backplane provided in example 1 of the present invention;
fig. 2 is a schematic structural view of a glass backplane provided in embodiment 2 of the present invention and attached with a metal frame.
In the figure:
1. tempering the glass; 2. a first ink layer; 3. a second ink layer; 4. an explosion-proof membrane; 5. a metal frame; 51. a first groove; 52. a second groove.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1
The embodiment discloses a glass back plate preparation process and a glass back plate. As shown in fig. 1, the glass back plate includes a tempered glass 1, a first ink layer 2 is disposed on one surface of the tempered glass 1, a second ink layer 3 is disposed on one side of the first ink layer 2 away from the tempered glass 1, and an explosion-proof membrane 4 is disposed on one side of the second ink layer 3 away from the first ink layer 2. The first ink layer 2 and the second ink layer 3 increase the optical density of the glass back plate 1, and the problem of light transmission of the glass back plate is solved; the explosion-proof film 4 is arranged, so that the explosion-proof characteristic of the glass back plate is improved, and the use safety is improved. The preferred values of the parameters of the glass back plate in the embodiment are as follows: the thickness of toughened glass 1 is 3mm, and the thickness of first printing ink layer 2 is 0.01mm, and the thickness of second printing ink layer 3 is 0.01mm, and the thickness of rupture membrane 4 is 0.075 mm. The glass back plate is mainly applied to a liquid crystal television; the back plate can also be applied to other display devices, such as monitors, computer monitors, projectors and other devices needing the back plate.
The preparation process of the glass backboard comprises the following steps:
(1) processing, namely processing the appearance of the glass to be processed; the glass to be processed is common transparent float car glass with the light transmittance of T3mm being 88%, the edge of the glass to be processed is processed by CNC, and edges and corners are polished.
(2) Performing primary silk-screen printing, namely silk-screen printing a first ink layer 2 on one surface of the processed glass; the ink of the first ink layer 2 is high-temperature ink, and the optical density of the glass after one-time screen printing is not lower than 3.8 (in this embodiment, it is preferably 4.0, but may be other values as long as it is not lower than 3.8).
(3) Tempering and quenching, namely tempering the glass after the primary screen printing, and quenching the first ink layer after the primary screen printing.
The glass after the primary screen printing is preheated in a tunnel furnace before tempering and quenching, the preheating temperature is 160-180 ℃ (in the embodiment, 170 ℃ is preferred, and other temperature values can be certainly realized as long as the temperature is 160-180 ℃), and the preheating time is 15-20 min (in the embodiment, 16min is preferred, and other time values can be certainly realized as long as the time is 15-20 min).
Tempering and quenching are carried out in a tempering furnace, the preheated glass is placed in the tempering furnace, the temperature in the furnace is 600-700 ℃ (in the embodiment, 680 ℃ is preferred, and other temperature values can be certainly realized as long as the temperature is between 600 ℃ and 700 ℃), the quenching time is 100-150 s (in the embodiment, the time is 100s is preferred, and other time values can be certainly realized as long as the time is between 100s and 150 s), and the surface stress of the tempered glass on the side away from the first ink layer 2 is 81 MPa. The tempering and quenching treatment increases the surface stress and the impact strength of the glass back plate and improves the adhesive force of the first ink layer 2;
(4) performing secondary silk-screen printing, namely silk-screen printing a second ink layer 3 on the quenched first ink layer 2; the printing ink of the second printing ink layer 3 is low-temperature printing ink, the area of the second printing ink layer 3 is smaller than that of the first printing ink layer 2, and the second printing ink layer 3 and the first printing ink layer 2 are arranged in a shape like a Chinese character 'hui'. The optical density of the glass after the secondary screen printing is not less than 4.8 (in the embodiment, 5.1 is preferred, but other values can be used as long as not less than 4.8). After the glass back plate is subjected to twice printing ink silk-screen printing, the falling ball impact strength of the glass back plate can reach 1m high free falling impact of a 510g steel ball without cracking.
The characteristic of few pinholes of low-temperature ink is utilized to make up the problem that the high-temperature ink is easy to generate pinholes, the optical density of the glass back plate is increased, and the problem of light transmission of the glass back plate is solved; the area of the first ink layer without the silk-screen printing of the second ink layer is a pasting area, the pasting area is high-temperature ink, the adhesive force is high, and the problem that the pasting area uses low-temperature ink and a pasting piece is easy to peel off from the ink layer is solved.
(5) Arranging an explosion-proof membrane, and arranging a layer of explosion-proof membrane on the second ink layer 3 on the glass after the secondary screen printing; the explosion-proof membrane is a PET (polyethylene terephthalate) film, and is adhered to the surface of the second ink layer through an acrylic adhesive. In this embodiment, it is preferable that: coating a layer of acrylic acid adhesive on the PET material film, wherein the adhesive has the characteristic of high temperature resistance, the 90-degree peeling force of the explosion-proof film on the glass back plate is not less than 1.2kgf/25mm, and the color of the explosion-proof film is black. The explosion-proof film is arranged, so that the explosion-proof characteristic of the glass back plate is improved, and the use safety is improved.
When the parameters of the glass back plate are selected as follows: the thickness of toughened glass 1 is 3mm, and the thickness of first printing ink layer 2 is 0.01mm, and the thickness of second printing ink layer 3 is 0.01mm, and the thickness of rupture membrane 4 is 0.075 mm. The surface stress values of the glass backing sheet obtained are shown in table 1.
TABLE 1
It can be known from the data in table 1 that the surface stress of the glass back plate is above 60MPa, and the surface stress of the glass back plate is related to the tempering temperature and the quenching time, and we speculate that the reason is that the higher the tempering temperature is, the larger the surface stress of the glass back plate is, and the shorter the quenching time is, the stress relaxation of the material can be avoided, so that the glass back plate can maintain the surface stress of the material, therefore, the tempering temperature and the quenching time can be matched with each other to adjust the surface stress, and in consideration of the process economy and the performance requirements of the glass back plate, when the tempering temperature and the quenching time are 680 ℃, 100s, the performance of the glass back plate obtained by the invention can be optimal.
Example 2
The embodiment discloses a metal frame fitting process; the glass backplane used in this example was the glass backplane of example 1. The area of the first ink layer 1 on the glass back plate, where the second ink layer 3 is not silk-screened, is a pasting area, and the metal frame 5 (in this embodiment, the material of the metal frame 5 is preferably aluminum) is pasted on the pasting area. The metal frame 5 is bonded on the bonding area through acrylic acid AB structural adhesive, a first groove 51 is arranged on the bonding surface of the metal frame 5, and a plurality of second grooves 52, preferably three grooves, are arranged on the bottom surface of the first groove 51. The first groove 51 and the second groove 52 arranged on the pasting surface of the metal frame 5 form a cavity with the pasting area, glue cannot flow out in the cavity, and meanwhile the whole pasting strength of the frame can be guaranteed. The second groove 52 may enhance the adhesion of the glue on the metal rim 5. The volume ratio of the glue A to the glue B in the acrylic AB structural glue is 10:1, and the proportioned glue is dispensed on the first groove 51 by using a screw valve glue dispenser.
Pressure maintaining, wherein the pressure maintaining jig maintains the pressure of the metal frame 5 and the glass back plate in the pasting process, and the pressure value of the pressure maintaining is 40g/mm2；
In the pressure maintaining process, the metal frame 5 and the glass back plate need to be subjected to pressure maintaining in place for one time, and the second operation is strictly forbidden, so that the bonding strength of the glue is reduced.
Heating and curing, namely putting the metal frame 5 and the glass back plate after pressure maintaining in a tunnel furnace for heating and curing, wherein the heating temperature is 60-70 ℃ (in the embodiment, 65 ℃ is preferred, and other temperature values can be certainly realized as long as the temperature is between 60-70 ℃), and the heating time is 3-5 min (in the embodiment, 3min is preferred, and other time values can be certainly realized as long as the temperature is between 3min-5 min); and after the heating and curing are finished, taking out the sample, and standing and curing at room temperature for 24H to ensure that the optimal bonding strength between the metal frame 5 and the glass backboard is achieved.
The selected glue is 10:1, acrylic AB structure glue, wherein the shear strength of the glue is 19.4MPa and the peel strength is 3.2KN/m under the condition that the film thickness of the test glue is 100 mu m; the shear strength of the glue is 16.9MPa and the peel strength is 4.2KN/m under the condition that the film thickness of the glue is 200 mu m; from the above data, it can be seen that the shear strength of the glue decreases with increasing thickness of the glue film, and the peel strength of the glue increases with increasing thickness of the glue film. In order to balance the shearing strength and the peeling strength of the glue, the film thickness of the glue is verified to be about 150 μm, and the adhesion performance and the adhesion stability are optimal through experiments, so that the film thickness of the glue is ensured to be about 150 μm. Therefore, the depth of the first groove 51 of the metal bezel 5 is selected to be 150 μm.
Before the metal frame 5 and the glass back plate are attached, the metal frame 5 and the glass back plate are cleaned by automatic cleaning equipment (dust, impurities, oil stains and the like), a 38- # dyne pen is used for testing dyne values of a glass back plate attaching area and a metal frame attaching surface, whether the attaching area meets an attaching condition or not is judged, and the attaching strength of the metal frame and the glass back plate can be influenced due to the dyne value of the attaching area.
The structure of the glass back panel manufactured by the metal frame attaching process and attached with the metal frame is shown in fig. 2, and includes the glass back panel in embodiment 1, and the glass back panel is attached with the metal frame 5.
The applicant declares that the present invention is exemplarily described by the above embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above manner, and it is within the protection scope of the present invention as long as various insubstantial modifications are made by using the concept and technical scheme of the present invention, or the concept and technical scheme of the present invention are directly applied to other occasions without modifications.
Claims (9)
1. The preparation process of the glass backboard is characterized by comprising the following steps:
s1, processing the shape of the glass to be processed;
s2, carrying out primary silk-screen printing, namely silk-screen printing of a first ink layer on one surface of the processed glass;
s3, tempering and quenching, namely tempering the glass after primary screen printing, and quenching the first ink layer after primary screen printing;
s4, performing secondary silk-screen printing, namely silk-screen printing a second ink layer on the quenched first ink layer;
s5, arranging an explosion-proof membrane, and arranging a layer of explosion-proof membrane on the second ink layer on the glass after the secondary screen printing;
the printing ink on the first printing ink layer is high-temperature printing ink, the printing ink on the second printing ink layer is low-temperature printing ink, the area of the second printing ink layer is smaller than that of the first printing ink layer, and the second printing ink layer and the first printing ink layer are arranged in a 'returning' shape.
2. The process for preparing a glass backsheet according to claim 1, further comprising, before step S3: preheating the glass after the primary screen printing in a tunnel furnace, wherein the preheating temperature is 160-180 ℃, and the preheating time is 15-20 min.
3. The process for preparing a glass back sheet according to claim 1, wherein the step S3 is carried out in a tempering furnace at a temperature of 600 ℃ to 700 ℃ for a quenching time of 100S to 150S.
4. The process for preparing a glass backboard according to claim 1, wherein the optical density of the glass after the primary screen printing is not less than 3.8; the optical density of the glass after the secondary silk-screen printing is not lower than 4.8.
5. The preparation process of the glass backboard according to claim 1, wherein the explosion-proof film is a PET (polyethylene terephthalate) film, and the explosion-proof film is adhered to the surface of the second ink layer through an acrylic adhesive.
6. The glass backboard is characterized by being manufactured by adopting the glass backboard manufacturing process according to any one of claims 1 to 5, the glass backboard comprises tempered glass (1), a first ink layer (2) is arranged on one surface of the tempered glass (1), a second ink layer (3) is arranged on one side, away from the tempered glass (1), of the first ink layer (2), and the explosion-proof membrane (4) is arranged on one side, away from the first ink layer (2), of the second ink layer (3).
7. The glass backboard according to claim 6, wherein the thickness of the tempered glass (1) is 3mm, the thickness of the first ink layer (2) is 0.01mm, the thickness of the second ink layer (3) is 0.01mm, and the thickness of the explosion-proof film (4) is 0.075 mm.
8. The process for attaching the metal frame is characterized in that the glass back plate prepared by the process for preparing the glass back plate as claimed in any one of claims 1 to 5 is adopted, the area of the first ink layer on the glass back plate, on which the second ink layer is not silk-screened, is a pasting area, and the metal frame is pasted on the pasting area.
9. The metal frame attaching process according to claim 8, wherein the metal frame is attached to the attaching area through acrylic AB structural adhesive, a first groove is formed in the attaching surface of the metal frame, and the volume ratio of the adhesive A to the adhesive B in the acrylic AB structural adhesive is 10: 1;
pressure maintaining, wherein the pressure maintaining jig maintains the pressure of the metal frame and the glass back plate in the pasting process, and the pressure value of the pressure maintaining is 40g/mm2；
Heating and curing, namely putting the metal frame and the glass back plate after pressure maintaining in a tunnel furnace for heating and curing, wherein the heating temperature is 60-70 ℃, and the heating time is 3-5 min;
and standing and maintaining, namely standing and maintaining the heated and cured metal frame and the glass back plate for 24 hours at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109809706A (en) * | 2019-03-27 | 2019-05-28 | 深圳创维－Rgb电子有限公司 | The preparation method of 3D glass television base, TV and 3D glass television base |
| US20210191185A1 (en) * | 2019-11-22 | 2021-06-24 | K-Tronics (Suzhou) Technology Co., Ltd. | Glass backplane and method of manufacturing the same, and display apparatus |
| CN112379551A (en) * | 2020-11-13 | 2021-02-19 | 广州易博士管理咨询有限公司 | Low-cost LCOS packaging method and LCOS packaged by same |
| CN116282956A (en) * | 2023-02-28 | 2023-06-23 | 合肥金龙浩科技有限公司 | Technology for assembling decoration by AF (AF) coated glass |
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