Method for coating organic glass with electric heating film

Abstract

The invention relates to the technical field of glass coating, and discloses a method for coating organic glass with an electric heating film. Comprising the following steps: preparing a prime coat paint and a protective coating paint; the prepared coating is subjected to defoaming treatment; organic glass is cut, and the surface of the organic glass is polished; performing surface infrared drying and degassing treatment on the organic glass; printing a bus for the first time on the organic glass, and drying and curing; carrying out vacuum degassing treatment on the surface of the organic glass; the prime coating is constructed on organic glass, and the prime coating is dried; carrying out ultraviolet curing on the base coating; coating a conductive film in vacuum; coating of the protective coating is constructed on organic glass, and the protective coating is dried; performing ultraviolet curing on the protective coating; the secondary bus is printed on the anchoring bus and is dried and cured; the current-carrying electrode is bonded on the secondary bus and is dried and cured; constructing a laminated organic interlayer; construction of a hot-pressing procedure; the device has the advantages that the current-carrying capacity of the bus is improved, and the electrifying stress between electric heating systems is shared.

Description

Technical Field

[0001] The present invention relates to the technical field of plexiglass treatment, and particularly to a method for coating an electrothermal film on plexiglass. Background Art

[0002] When coating an electrothermal film on plexiglass, it is easy to cause problems such as cracking of the film layer when the energized current deforms the electrothermal coating film layer, and delamination between the electrothermal coating film layer and the conductive electrode.

[0003] Due to the fact that plexiglass is not resistant to high temperatures, it is impossible to use high-temperature deposition coating technology to fabricate the electrothermal film layer, and the high adhesion strength characteristics of high-temperature deposition coating technology cannot be achieved.

[0004] Plexiglass coating usually requires the use of a special coating in combination with plexiglass and the coating layer to ensure the adhesion strength between the electrothermal coating film layer and the substrate and increase the reliability of the electrothermal coating.

[0005] Therefore, a method for coating an electrothermal film on plexiglass is provided to solve the above problems. Summary of the Invention

[0006] The main object of the present invention is to solve the problems that when coating an electrothermal film on plexiglass, it is easy to cause problems such as cracking of the film layer when the energized current deforms the electrothermal coating film layer, and delamination between the electrothermal coating film layer and the conductive electrode. Due to the fact that plexiglass is not resistant to high temperatures, it is impossible to use high-temperature deposition coating technology to fabricate the electrothermal film layer, and the high adhesion strength characteristics of high-temperature deposition coating technology cannot be achieved.

[0007] The first aspect of the present invention provides a method for coating an electrothermal film on plexiglass, and the method for coating an electrothermal film on plexiglass includes:

[0008] Step 1: Prepare the primer coating and the protective coating for the plexiglass substrate according to the formula;

[0009] Step 2: Degas the prepared coating;

[0010] Step 3: Cut the plexiglass into appropriate sizes and polish the surface;

[0011] Step 4: Perform surface infrared drying and degassing treatment on the polished plexiglass;

[0012] Step 5: Print the first bus bar in the designed electrothermal electrode area;

[0013] Step 6: Perform vacuum degassing treatment on the plexiglass surface;

[0014] Step 7: Apply the primer coating on the plexiglass and use infrared irradiation to surface-dry the primer coating;

[0015] Step 8: Ultraviolet-cure the primer coating;

[0016] Step 9: Vacuum coat the conductive film;

[0017] Step 10: Apply the protective coating on the plexiglass and use infrared irradiation to surface-dry the protective coating;

[0018] Step 11: Ultraviolet-cure the protective coating;

[0019] Step 12: Print the secondary busbar on the anchored busbar in the appropriate area and perform the second drying and curing;

[0020] Step 13: Bond the current-carrying electrode to the secondary busbar and perform the third drying and curing;

[0021] Step 14: Construct the laminated organic interlayer;

[0022] Step 15: Perform the hot pressing process.

[0023] Furthermore, the defoaming treatment includes clean defoaming methods such as vacuum defoaming and ultrasonic defoaming.

[0024] Furthermore, the infrared drying and degassing treatment includes the methods of infrared irradiation or hot air drying, and the required temperature is lower than the temperature range at which the plexiglass undergoes thermal deformation.

[0025] Furthermore, the degassing vacuum degree is lower than 5000 Pa.

[0026] Furthermore, the required temperature for surface drying is lower than the temperature at which the plexiglass undergoes thermal deformation and higher than the curing temperature of the primer coating.

[0027] Furthermore, the required temperature for drying during the first drying and curing is lower than the temperature at which the plexiglass undergoes thermal deformation and higher than the curing temperature of the busbar.

[0028] Furthermore, the required temperature for drying during the second drying and curing is lower than the temperature at which the plexiglass undergoes thermal deformation and higher than the curing temperature of the protective coating.

[0029] Furthermore, the required temperature for drying during the third drying and curing is lower than the temperature at which the plexiglass undergoes thermal deformation and higher than the curing temperature of the adhesive.

[0030] Furthermore, the primer coating includes epoxy resin-based and acrylate-based coatings, and the protective coating includes acrylate-based and polyurethane-based coatings.

[0031] The defoaming treatment of the coating in Step 2 can reduce the residual gas on the surface of the fabricated coating, resulting in a higher qualified rate of the coating. The drying degassing in Step 4 and the vacuum degassing in Step 6 can reduce the gas residue inside the PMMA substrate body, avoiding various failure modes caused by substrate impurities and making the fabrication of each functional layer on the substrate more reliable. The design of the anchor busbar in Step 5 can improve the bonding strength and load-bearing capacity of the electrodes in the electric heating system between the substrate, the conductive film, and the coating, making the entire system more reliable. Using the protective coating on the conductive film in Steps 10-11 can enhance the construction environment resistance of the conductive film before the lamination process and increase the bonding strength between the large-area conductive film and the laminated organic interlayer. Connecting the current-carrying electrode to the busbar in Step 13 can increase the current-carrying capacity of the busbar and share the energization stress between the electric heating systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flowchart of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0033] An embodiment of the present invention provides a method for coating an electric heating film on PMMA, including: Step 1: Prepare the primer coating and the protective coating for the PMMA substrate according to the formula; Step 2: Perform defoaming treatment on the prepared coatings; Step 3: Cut the PMMA into appropriate sizes and polish the surface; Step 4: Perform surface infrared drying degassing treatment on the polished PMMA; Step 5: Print the first busbar in the designed electric heating electrode area; Step 6: Perform vacuum degassing treatment on the PMMA surface; Step 7: Apply the primer coating on the PMMA and use infrared irradiation to dry the primer coating on the surface; Step 8: Ultraviolet-cure the primer coating; Step 9: Deposit the conductive film by vacuum coating; Step 10: Apply the protective coating on the PMMA and use infrared irradiation to dry the protective coating on the surface; Step 11: Ultraviolet-cure the protective coating; Step 12: Print the secondary busbar on the anchor busbar in the appropriate area and perform the second drying and curing; Step 13: Bond the current-carrying electrode to the secondary busbar and perform the third drying and curing; Step 14: Perform the lamination of the organic interlayer; Step 15: Perform the hot pressing process. The main purpose of the present invention is to solve the problems that when coating an electric heating film on PMMA, it is easy to cause cracking of the film layer when the energizing current deforms the electric heating coating film layer, and delamination between the electric heating coating film layer and the conductive electrode, etc. Due to the fact that PMMA is not resistant to high temperatures, it is impossible to use the high-temperature deposition coating technology to fabricate the electric heating film layer, and the high adhesion strength characteristics of the high-temperature deposition coating technology cannot be achieved.

[0034] In the description, claims and above-mentioned drawings of the present invention, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0035] For ease of understanding, the specific process of the embodiments of the present invention will be described below. The first embodiment of the method for coating an electrothermal film on plexiglass provided by the present invention includes:

[0036] Step 1: Prepare the primer coating and the protective coating for the plexiglass substrate according to the formula. The primer coating includes epoxy resin-based and acrylate-based coatings, and the protective coating includes acrylate-based and polyurethane-based coatings.

[0037] Step 2: Perform defoaming treatment on the prepared coatings. The defoaming treatment includes clean defoaming methods such as vacuum defoaming and ultrasonic defoaming.

[0038] Step 3: Cut plexiglass to a suitable size and polish its surface.

[0039] Step 4: Perform surface infrared drying and degassing treatment on the polished plexiglass. The infrared drying and degassing treatment includes methods such as infrared irradiation or hot air drying, and the required temperature is lower than the temperature range at which the plexiglass undergoes thermal deformation.

[0040] Step 5: In a suitable area on the plexiglass, print the first busbar, i.e., the anchor busbar, and perform the first drying and curing. The drying temperature is lower than the temperature range at which the plexiglass undergoes thermal deformation and higher than the busbar curing temperature.

[0041] Step 6: Perform vacuum degassing treatment on the plexiglass surface. The degassing vacuum degree needs to be lower than 5000 Pa.

[0042] Step 7: Apply the primer coating on the plexiglass and use infrared irradiation to surface-dry the primer coating. The required surface-drying temperature is lower than the temperature range at which the plexiglass undergoes thermal deformation and higher than the primer coating curing temperature.

[0043] Step 8: Cure the primer coating by ultraviolet light.

[0044] Step 9: Deposit a conductive film by vacuum coating.

[0045] Step 10: Apply the protective coating on the plexiglass and use infrared irradiation to dry the surface of the protective coating. The drying temperature should be lower than the temperature at which the plexiglass deforms due to heat and higher than the curing temperature of the protective coating.

[0046] Step 11: Cure the protective coating by ultraviolet light.

[0047] Step 12: Print the secondary busbars on the anchor busbars in the appropriate area and perform the second drying and curing. The drying temperature should be lower than the temperature at which the plexiglass deforms due to heat and higher than the curing temperature of the busbars.

[0048] Step 13: Bond the current-carrying electrodes to the secondary busbars and perform the third drying and curing. The drying temperature should be lower than the temperature at which the plexiglass deforms due to heat and higher than the curing temperature of the adhesive.

[0049] Step 14: Construct the laminated organic interlayer.

[0050] Step 15: Perform the hot pressing process.

[0051] 1. The defoaming treatment of the coating in Step 2 can reduce the residual gas on the surface of the produced coating, resulting in a higher qualified rate of the coating.

[0052] 2. The drying degassing and vacuum degassing in Steps 4 and 6 can reduce the gas residue inside the plexiglass substrate body, avoid various failure forms caused by substrate impurities, and improve the reliability of fabricating each functional layer on the substrate.

[0053] 3. The design of the anchor busbars in Step 5 can improve the bonding strength and bearing foundation of the electrodes in the electrothermal heating system between the substrate, the conductive film, and the coating, making the entire system more reliable.

[0054] 4. Using the protective coating on the conductive film in Steps 10 - 11 can increase the resistance of the conductive film to the construction environment before the lamination process and increase the bonding strength between the large-area conductive film and the laminated organic interlayer.

[0055] 5. Bonding the current-carrying electrodes to the busbars in Step 13 can increase the current-carrying capacity of the busbars and share the energization stress between the electrothermal heating systems.

[0056] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems or devices and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0057] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for coating an electric heating film on organic glass, characterized in that: include: Step 1: Prepare the primer coating and protective coating coating of the organic glass substrate according to the formula; Step 2: Defoam the prepared coating; Step 3: Cut the plexiglass into appropriate sizes and polish the surface; Step 4: The polished organic glass is subjected to infrared drying and degassing treatment on the surface; Step 5: Print the first busbar in the designed electric heating electrode area; Step 6: Vacuum degassing the surface of the organic glass; Step 7: Apply the primer coating on the plexiglass and use infrared radiation to dry the primer coating on the surface; Step 8: UV curing primer coating; Step 9: Vacuum coating of conductive film; Step 10: The protective coating is applied on the plexiglass and the protective coating is dried using infrared radiation on the surface; Step 11: UV curing protective coating; Step 12: The secondary busbar is printed on the anchor busbar in the appropriate area and dried and cured for the second time; Step 13: The current-carrying electrode is bonded to the secondary busbar and dried and cured for the third time; Step 14: Lamination of organic interlayer construction; Step 15: Hot pressing process construction.

2. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: Defoaming treatment includes vacuum defoaming and ultrasonic defoaming.

3. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: Infrared drying and degassing treatment includes infrared irradiation or hot air drying, and the required temperature is lower than the thermal deformation temperature range of organic glass.

4. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The degassing vacuum is lower than 5000Pa.

5. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The temperature required for surface drying is lower than the thermal deformation temperature of organic glass and higher than the curing temperature of the primer.

6. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The temperature required for the first drying and curing is lower than the thermal deformation temperature of the organic glass and higher than the curing temperature of the busbar.

7. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The temperature required for the second drying and curing is lower than the thermal deformation temperature of the organic glass and higher than the curing temperature of the protective coating.

8. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The temperature required for the third drying and curing is lower than the thermal deformation temperature of the organic glass and higher than the curing temperature of the adhesive.

9. The method for coating an electric heating film on organic glass according to claim 1, characterized in that: The primer coating includes epoxy resin and acrylate coating, and the protective coating coating includes acrylate and polyurethane coating.

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