Glass black mark forming method and black mark process thereof

Abstract

The application discloses a glass black mark forming method and a black mark process thereof, relates to the glass black mark forming field, and comprises a color band, the color band comprises a back film and a black mark smeared on the back film, and the black mark comprises the following composition components and steps: a metal copper foil, a black agent, a glass powder, silver powder, a dispersing agent and a binder. The application realizes the deep black permanent mark required by high-end glass. Since the mark process is a normal-temperature physical transfer combined with subsequent thermal strengthening, immediate high-temperature curing is not needed, the contrast between the formed black mark and the glass background is extremely high, the core color band of the application is a coiled material, the cost is controllable, the process is a non-contact laser transfer, there are no problems such as nozzle blockage and screen wear, the adhesion is excellent, and the durability is strong: after preliminary transfer, the pattern is firmly attached.

Description

Technical Field

[0001] This invention relates to the field of glass black label molding, specifically a glass black label molding method and black label process. Background Technology

[0002] With the continuous development of intelligent manufacturing and product traceability systems, achieving high adhesion and high contrast permanent markings (such as logos, certification marks, unique QR codes, etc.) on glass surfaces has become a key requirement for high-end glass products (such as automotive glass, high-speed rail glass, high-end shower rooms, etc.) and intelligent production lines. Currently, the industry mainly relies on the following technical solutions:

[0003] Screen printing: Although this method can achieve multi-color printing, it has fundamental defects. First, the ink must be baked at a high temperature of over 600°C after printing to cure and adhere. This means that this process can only be arranged in the final stage of glass production (such as after tempering). It is impossible to mark the glass in the middle process to achieve traceability of the entire production process. Second, the screen is prone to clogging, which makes it difficult to guarantee printing accuracy and consistency. It is not suitable for high-quality appearance requirements. Most importantly, it cannot achieve economical and efficient printing of unique variable information (such as serial numbers and QR codes) for each piece of glass.

[0004] Laser engraving: This method uses a laser to directly mark the glass surface, enabling personalized marking of variable information. However, the resulting mark is essentially a micro-melting or vaporization of the glass surface, usually presenting a grayish-white frosted effect with a single color. This is seriously inconsistent with the deep black, high-contrast markings required by many high-end application scenarios (such as black brand logos on car windows). In addition, the scanning recognition rate of frosted QR codes is low, and the requirements for the performance of the barcode reader and the ambient lighting conditions are extremely demanding. Recognition is unstable in complex industrial environments, and if high-performance barcode readers need to be deployed at multiple workstations, the system cost will be high.

[0005] High-resolution inkjet printing: Although this method offers a rich variety of colors, it also faces the limitation of high-temperature curing (>600℃), making it unsuitable for process traceability. Its core pain point lies in equipment cost and maintenance: high-precision printheads rely on imports, are expensive, and are extremely fragile and easily damaged. In industrial environments, their lifespan is typically only 1-2 years, maintenance is cumbersome, and the cost of use remains high, making it difficult to promote and apply on a large scale.

[0006] In summary, existing technologies all have significant shortcomings: they either fail to meet the aesthetic and color requirements of high-end products (laser engraving), or are incompatible with the processes and variable information needs of intelligent production traceability (screen printing, printing), or have excessively high overall costs and insufficient reliability (printing). Therefore, the market urgently needs a new solution that can be applied at any stage of glass production, form a permanent and robust deep black high-precision mark, and is suitable for efficient coding of variable data. Summary of the Invention

[0007] The purpose of this invention is to provide a glass black label forming method and black label process to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a glass black label process, characterized in that the color strip includes a PET substrate and a transfer layer coated on the PET substrate, the transfer layer comprising the following components and steps: copper foil, blackening agent, glass powder, silver powder, dispersant and adhesive;

[0009] Step 1: Sputter metallic copper onto a PET substrate using a vacuum magnetron sputtering copper target, with a coating thickness between 20 nanometers and 120 nanometers, to form a metallic copper foil;

[0010] Step 2: Add 72% blackening agent, 10% glass powder, 8% silver powder, 5% dispersant and 5% binder to the mixing tank in the specified proportions and stir to obtain a viscous coating.

[0011] Step 3: Apply an adhesive coating to one side of the copper foil using a coating method to form a transfer layer;

[0012] Step 4: After the coating dries and cures, it forms a roll material, which is then slit into smaller rolls.

[0013] As a further embodiment of the present invention: the blackening agent comprises one or a mixture of several of the following: cobalt black (average particle size 1μm-5μm), iron chromium black (average particle size 1μm-4μm), copper chromium black (average particle size 1μm-2.5μm), manganese iron black (average particle size 1μm-2.5μm), titanium black (average particle size 1μm-3μm) powder, and graphite (average particle size 2-8μm).

[0014] As a further embodiment of the present invention, the organic solvent is one or a mixture of several of methanol, butanone, ethyl acetate, xylene, and N,N-dimethylformamide.

[0015] As a further aspect of the present invention: the organic solvent and the blackening agent are dispersed by ultrasonication and physical stirring during the mixing process, so that the solid powder of the blackening agent is uniformly dispersed in the solvent.

[0016] As a further embodiment of the present invention: the adhesive is one or more of epoxy resin, acrylic resin, polyurethane resin, ethyl cellulose, and rubber, or different types of the same type of resin, which are thoroughly mixed and added slowly to the solution being stirred. The amount added is five percent of the solid mass. The mixture is then dispersed for more than one hour by ultrasonic vibration and physical stirring until all components are uniformly mixed, and finally formulated into a black viscous coating suitable for coating processes.

[0017] As a further aspect of the present invention: the black viscous coating is applied evenly to the copper foil surface of PET by coating method, and the coating thickness is between 5μm and 40μm.

[0018] A method for forming a glass black label includes the following steps:

[0019] Step 1: First, place the ribbon on the top surface of the support plate, then lay the ribbon flat on the surface of the glass to be tempered, then lay a layer of celluloid backing film on top of the ribbon for barrier, and finally cover the backing film with a glass cover plate with a light transmittance of 60%-90%, and press this glass cover plate firmly onto the surface of the glass to be processed.

[0020] Step 2: The high-energy-density laser beam emitted by the MOPA pulsed laser penetrates the black transfer layer, peels off the transfer layer and the copper foil, and separates it from the PET carrier film. The high energy acting on the glass will cause microscopic damage to the glass surface, while the black color layer and copper layer are "embedded" into the glass to a certain depth, achieving strong adhesion on the glass before tempering.

[0021] Step 3: Remove the glass cover, celluloid backing film, and PET substrate with ribbon. A black pattern will then be formed on the surface of the tempered glass to be processed. This pattern will solidify after processing and has extremely strong adhesion.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. Achieves permanent deep black marking required for high-end glass: This invention uses a specially formulated coating containing a blackening agent (such as cobalt black or titanium black) to form a deep black pattern with pure color and strong adhesion on the glass surface after laser transfer. This perfectly meets the stringent appearance requirements for black logos in automobiles, high-speed rail, and high-end architectural glass, filling the gap in existing laser direct marking technology in this field.

[0024] 2. Compatible with intelligent full-process traceability, breaking through process limitations: Since the marking process is a combination of room temperature physical transfer and subsequent thermal strengthening, it does not require immediate high-temperature curing. Therefore, it can be coded (such as QR code) in any early process of glass cutting, edge grinding, coating and other production processes. This lays the technical foundation for realizing full life cycle traceability of "one item, one code" and solves the pain point that screen printing and inkjet printing can only be carried out in the last process.

[0025] 3. Significantly improves the reliability and economy of traceability scanning: The resulting black markings have a very high contrast with the glass background. In actual traceability, a simple white background board is placed at the workstation to create a clear black-and-white visual contrast, enabling ordinary industrial barcode readers to achieve a reading rate of nearly 100%. This significantly reduces the reliance on expensive high-end visual recognition equipment, simplifies system deployment, and greatly reduces the construction and maintenance costs of smart manufacturing production lines.

[0026] 4. Low overall cost, high reliability, and easy maintenance: The core ribbon of this invention is roll material, which makes the cost controllable. During use, it is a non-contact laser transfer process, eliminating consumable issues such as printhead clogging and screen wear. The laser and optical system are stable and durable, requiring far less maintenance than high-precision inkjet equipment. The ribbon manufacturing process is mature and can be domestically produced, eliminating dependence on imported precision printheads and significantly improving supply chain security and economic benefits.

[0027] 5. Excellent adhesion and strong durability: The pattern is firmly attached after the initial transfer. More importantly, the glass powder in its coating composition can work synergistically with the subsequent tempering process (~800℃) to form a chemical bond with the glass substrate at high temperature, so that the weather resistance, wear resistance and high temperature resistance of the marking reach or even exceed the level of traditional high temperature inks. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] In the diagram: 1. Support plate; 2. Tempered glass; 3. Color strip; 4. Celluloid backing film; 5. Glass cover plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1In this embodiment of the invention, a glass black label forming method and black label process are provided, including a color ribbon 3. The color ribbon 3 includes a PET substrate and a transfer layer coated on the PET substrate. The transfer layer includes the following components and steps: copper foil, blackening agent, glass powder, silver powder, dispersant and adhesive.

[0032] Step 1: Sputter metallic copper onto a PET substrate using a vacuum magnetron sputtering copper target, with a coating thickness between 20 nanometers and 120 nanometers, to form a metallic copper foil;

[0033] Step 2: Add 72% blackening agent, 10% glass powder, 8% silver powder, 5% dispersant and 5% binder to the mixing tank in the specified proportions and stir to obtain a viscous coating.

[0034] Step 3: Apply an adhesive coating to one side of the copper foil using a coating method to form a transfer layer;

[0035] Step 4: After the coating dries and cures, it forms a roll material, which is then slit into smaller rolls.

[0036] In this embodiment, the copper foil plays a role in efficiently absorbing laser energy and instantly converting it into uniform heat energy. Combined with the high laser transmittance and flexibility of the PET substrate, it ensures that the laser energy can pass through the substrate without damage and be accurately absorbed. This provides an instantaneous and localized heat source for the melting and transfer of the coating. Furthermore, after being heated, it can form a metallic luster on the surface, increasing its aesthetic appeal.

[0037] Please refer to this carefully. Figure 1 The blackening agent includes one or a mixture of several of the following: cobalt black (average particle size 1μm-5μm), iron chromium black (average particle size 1μm-4μm), copper chromium black (average particle size 1μm-2.5μm), manganese iron black (average particle size 1μm-2.5μm), titanium black (average particle size 1μm-3μm) powder, and graphite (average particle size 2-8μm).

[0038] In this embodiment, the developer should contain at least one component: cobalt black. If combined with other components, it will have the following effect: the developer, which is a combination of cobalt black and other components, provides a high-contrast permanent black color. Cobalt black is responsible for high-temperature stability, while other components enhance the absorption efficiency of near-infrared laser. They work together to form a pure black mark with excellent weather resistance under the action of laser.

[0039] Please refer to this carefully. Figure 1 The organic solvent is one or a mixture of several of methanol, butanone, ethyl acetate, xylene, and N,N-dimethylformamide.

[0040] In this embodiment, the organic solvent plays a role in regulating the leveling properties and drying speed of the coating, and provides faster initial volatility, so that the coating can be quickly set and fully leveled during the coating process, avoiding defects such as orange peel or pinholes.

[0041] Please refer to this carefully. Figure 1 During the mixing process of organic solvent and developer, ultrasonic and physical stirring are used to disperse the solid powder of developer in the solvent.

[0042] In this embodiment, the combined process of ultrasonic dispersion and physical-mechanical stirring enables the nanopowder to fully deagglomerate and disperse evenly in the solvent. Ultrasonic waves provide high-energy microscopic breaking force, while physical stirring achieves macroscopic fluid circulation. The two work together to ensure that solid components such as blackening agents and glass powder achieve a highly uniform and stable dispersion state in the system.

[0043] Please refer to this carefully. Figure 1 The adhesive is one or more of epoxy resin, acrylic resin, polyurethane resin, ethyl cellulose, and rubber, or different types of the same type of resin. The mixture is thoroughly mixed and slowly added to the solution under stirring. The amount added is five percent of the solid mass. The mixture is then dispersed for more than one hour using ultrasonic vibration and physical stirring until all components are evenly mixed. Finally, a black viscous coating suitable for coating processes is prepared.

[0044] In this embodiment, the adhesive serves to provide both temporary bonding and adhesion, giving the coating appropriate brittleness for laser peeling, thus realizing the functional transformation of the coating from "easy to transfer" to "firmly adhered".

[0045] Please refer to this carefully. Figure 1 The black viscous coating is applied evenly to the copper foil surface of PET through a coating process, with a coating thickness between 5μm and 40μm.

[0046] In this embodiment, the combination of copper foil and silver powder can achieve uniform heat transfer into the coating, ensuring that the temperature of the coating remains consistent both inside and outside.

[0047] A method for forming a glass black label includes the following steps:

[0048] Step 1: First, place the ribbon 3 on the top surface of the support plate 1, then lay the ribbon 3 flat on the surface of the glass 2 to be tempered, then lay a layer of celluloid backing film 4 on top of the ribbon 3 for barrier, and finally cover the backing film with a glass cover plate 5 with a light transmittance of 60%-90%, and press the glass cover plate 5 tightly onto the surface of the tempered glass 2 to be processed by pressure.

[0049] Step 2: The high-energy-density laser beam emitted by the MOPA pulsed laser penetrates the black transfer layer, peels off the transfer layer and the copper foil, and separates it from the PET carrier film. The high energy acting on the glass will cause microscopic damage to the glass surface, while the black color layer and copper layer are "embedded" into the glass to a certain depth, achieving strong adhesion on the glass before tempering.

[0050] Step 3: Remove the glass cover plate 5, celluloid backing film 4 and PET substrate of ribbon 3. A black pattern will be formed on the surface of the tempered glass 2 to be processed. This pattern will be solidified after processing and has extremely strong adhesion.

[0051] In this embodiment, the MOPA pulsed laser and its set parameters (wavelength 1064nm, pulse frequency 200kHz) provide a high-precision, high-thermal-control energy beam. The high repetition rate ensures processing efficiency. The adjustable pulse waveform and short pulse width, combined with the absorption characteristics of the ribbon coating, can precisely confine heat to an extremely thin area at the interface, achieving clean melting and transfer of the coating without damaging the glass substrate. The laser-formed pattern and the subsequent tempering process work together to complete the final curing of the mark. Laser processing enables the pattern to initially adhere, while the subsequent high-temperature tempering process melts the glass powder in the coating and chemically bonds it with the glass substrate. The two work together to achieve the mark's exceptional adhesion and durability.

[0052] It should be noted that during laser printing, graphics or text are designed using computer software, and the direction of the laser is controlled to form a specific pattern.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A glass black label process, comprising a color strip (3), characterized in that, The ribbon (3) includes a PET substrate and a transfer layer coated on the PET substrate. The transfer layer includes the following components and steps: copper foil, blackening agent, glass powder, silver powder, dispersant and adhesive. Step 1: Sputter metallic copper onto a PET substrate using a vacuum magnetron sputtering copper target, with a coating thickness between 20 nanometers and 120 nanometers, to form a metallic copper foil; Step 2: Add 72% blackening agent, 10% glass powder, 8% silver powder, 5% dispersant and 5% binder to the mixing tank in the specified proportions and stir to obtain a viscous coating. Step 3: Apply an adhesive coating to one side of the copper foil using a coating method to form a transfer layer; Step 4: After the coating dries and cures, it forms a roll material, which is then slit into smaller rolls.

2. The glass black label process according to claim 1, characterized in that, The blackening agent comprises one or a mixture of several of the following: cobalt black (average particle size 1μm-5μm), iron chromium black (average particle size 1μm-4μm), copper chromium black (average particle size 1μm-2.5μm), manganese iron black (average particle size 1μm-2.5μm), titanium black (average particle size 1μm-3μm) powder, and graphite (average particle size 2-8μm).

3. The glass black label process according to claim 1, characterized in that, The organic solvent is one or a mixture of several of methanol, butanone, ethyl acetate, xylene, and N,N-dimethylformamide.

4. The glass black label process according to claim 3, characterized in that, The organic solvent and the blackening agent are dispersed by ultrasonication and physical stirring during the mixing process, so that the solid powder of the blackening agent is evenly dispersed in the solvent.

5. The glass black label process according to claim 1, characterized in that, The adhesive is one or more of epoxy resin, acrylic resin, polyurethane resin, ethyl cellulose, and rubber, or different types of the same type of resin. The mixture is thoroughly mixed and slowly added to the stirred solution at a rate of 5% of the solid mass. The mixture is then dispersed for more than 1 hour using ultrasonic vibration and physical stirring until all components are evenly mixed, and finally formulated into a black viscous coating suitable for coating processes.

6. The glass black label process according to claim 5, characterized in that, The black viscous coating is applied evenly to the copper foil surface of the PET by coating method, with a coating thickness between 5μm and 40μm.

7. A method for forming a glass black label, used to solidify the black label process described in any one of claims 1-6 onto the surface of a color strip (3), characterized in that, Includes the following steps: Step 1: First, place the ribbon (3) on the top surface of the support plate (1), then lay the ribbon (3) flat on the surface of the glass (2) to be tempered, then lay a layer of celluloid backing film (4) on top of the ribbon (3) for barrier, and finally cover the backing film with a glass cover plate (5) with a light transmittance of 60%-90%, and press the glass cover plate (5) onto the surface of the tempered glass (2) to be processed by pressure. Step 2: The high-energy-density laser beam emitted by the MOPA pulsed laser penetrates the black transfer layer, peels off the transfer layer and the copper foil, and separates them from the PET carrier film. The high energy acting on the glass will cause microscopic damage to the glass surface, while the black color layer and copper layer are "embedded" into the glass to a certain depth, achieving strong adhesion on the glass before tempering. Step 3: Remove the PET substrate of the glass cover (5), celluloid backing film (4) and color strip (3), and a black pattern will be formed on the surface of the tempered glass (2) to be processed. This pattern is solidified after processing and has extremely strong adhesion.

Images