Porcelain enamel composite panel, preparation method therefor, and application thereof

Abstract

Disclosed are a porcelain enamel composite panel, a preparation method therefor, and an application thereof. The porcelain enamel composite panel preparation method specifically comprises the following steps: (1) subjecting a porcelain enameled steel sheet to abrasive blasting treatment, applying a slurry coating, firing at a high temperature, stacking and laying-up, and pre-pressing and shaping; (2) subjecting an aluminum backing sheet to abrasive blasting treatment; and (3) sequentially laminating the porcelain enameled steel sheet, an aluminum honeycomb core, and the aluminum backing sheet by using an epoxy adhesive, so as to obtain the porcelain enamel composite panel. The porcelain enamel composite panel of the present invention has excellent performance, with significantly improved bond strength, weather resistance, and panel flatness. The porcelain enamel composite panel is not only suitable for interior installation, but also can be widely applied to architectural facades, thereby expanding the scope of application and increasing the economic value thereof.

Description

An enamel composite panel, its preparation method and application Technical Field

[0001] This invention relates to the field of curtain wall and enamel composite panel technology, and more specifically to an enamel composite panel, its preparation method and application. Background Technology

[0002] A curtain wall is a non-load-bearing exterior wall covering for a building. It is hung up like a curtain, hence the name "curtain wall". It is a lightweight wall structure with decorative effects commonly used in modern large and high-rise buildings.

[0003] Enameled composite panels are mainly composed of three parts: enamel-coated steel sheets, aluminum honeycomb cores, and aluminum backing sheets. They are not only aesthetically pleasing and easy to clean, but also have good rust resistance. However, when applied to curtain walls, the significant plastic deformation within the enamel-coated composite panels after high-temperature sintering makes it difficult for traditional pressing processes to achieve a smooth finish. Furthermore, the exposure to sunlight, rain, and extreme temperatures places higher demands on the adhesives used in curtain wall enamel composite panels, as the internal adhesives are unsuitable.

[0004] Therefore, how to develop an enamel composite panel suitable for curtain walls is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an enamel composite plate, its preparation method and application, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for preparing an enamel composite panel specifically includes the following steps:

[0008] (1) Sandblasting the enamel steel plate, spraying glaze, firing at high temperature, stacking and pre-pressing to shape;

[0009] (2) Sandblast the backing aluminum plate;

[0010] (3) The enamel steel plate, aluminum honeycomb core and backing aluminum plate are bonded together in sequence using epoxy adhesive. Specifically, the enamel steel plate and aluminum honeycomb core are first bonded together with epoxy adhesive, and then the aluminum honeycomb core and backing aluminum plate are also bonded together with adhesive to obtain the enamel composite plate.

[0011] Furthermore, in step (1) above, the roughness of the enamel steel plate is 1.5-1.7 after sandblasting.

[0012] The further beneficial effect of the above-mentioned method is that the present invention improves the surface roughness of the bonding surface between the enamel steel plate and the backing aluminum plate through sandblasting, enhances the contact area between the epoxy adhesive and the contact surface, and changes the line contact to a volume contact.

[0013] Furthermore, in step (1) above, the coating thickness of the glaze is 100-150 μm.

[0014] The further beneficial effect of the above-mentioned method is that the bonding surface of the enamel steel plate of the present invention is sandblasted and then coated with enamel, which not only improves the adhesion between the enamel steel plate and the enamel, but also improves the roughness of the enamel surface.

[0015] Furthermore, in step (1) above, the pre-compression shaping pressure is 2-3 MPa and the time is more than 10 minutes.

[0016] The further beneficial effect of the above-mentioned method is that the present invention pre-presses and shapes the enamel steel plate before composite bonding, and eliminates the internal stress generated by high-temperature firing through static overload.

[0017] Furthermore, in step (2) above, the roughness of the backing aluminum plate is 1.5-1.7 after sandblasting.

[0018] The further beneficial effect of the above-mentioned method is that the aluminum backing plate of the present invention is sandblasted before use, which not only removes the oxide layer of the aluminum backing plate, but also improves the surface roughness of the aluminum backing plate.

[0019] Furthermore, in step (3) above, the epoxy adhesive includes component A and component B in a mass ratio of 2:1;

[0020] By mass percentage, component A comprises 30%-40% epoxy resin, 30%-40% modified epoxy toughening agent, 5%-10% core-shell toughening particles, 5%-10% reactive diluent, 1%-5% silane coupling agent, 0.5%-1% wetting and dispersing agent, and 15%-25% filler;

[0021] By mass percentage, component B comprises 30%-40% polyamide, 10%-20% modified amine, 1%-5% accelerator, 0.5%-1% wetting and dispersing agent, and 30%-40% filler;

[0022] The epoxy resin is at least one of NPEL-128, EPOKIKDO YD-128, NPEF-170, YDF-170, DEN 431 and NPPN 631;

[0023] The modified epoxy toughening agent is at least one of SL-102C-2, 102C-4H, 102C-4L, 102C-4T, 102C-4R, PD3604, PD3614, JEF-0211 and ERS-172;

[0024] The core-shell toughening particles are at least one of Kaneka MZ100, Kaneka MZ200, Kaneka B-564, and Kaneka M-701;

[0025] The active diluent is at least one of 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, cashew phenol diglycidyl ether, and pentaerythritol tetraglycidyl ether;

[0026] The silane coupling agent is γ-glycidyl ether propyltriethoxysilane (KH560);

[0027] The wetting and dispersing agent is at least one of BYK-2151, BYK-163, EFKA-4010 and Silok 7631;

[0028] The filler is at least one of 150-mesh heavy calcium carbonate, 800-mesh light calcium carbonate, 1500-mesh talc, fumed silica, and kaolin.

[0029] The polyamide is at least one of Versamid 140, WSCM-4140, D8140, Ancamide2784, G-640, G-0930 and G-5022;

[0030] The modified amine is at least one of LT-477, SF-PAA-5035P, SF-PAA-4530, R-2269 and R-3611;

[0031] The accelerator is at least one of 2,4,6-tris(dimethylaminomethyl)phenol, 2-ethyl-4-methylimidazolium, salicylic acid, triphenylphosphine, and 1,8-diazabicycloundec-7-ene.

[0032] The further beneficial effects of the above-mentioned method are that the epoxy adhesive of the present invention has high heat resistance, high peel strength, and good heat and aging resistance. It can be cured at room temperature (25°C) and has good adhesion to various metal substrates after curing.

[0033] Furthermore, in step (3) above, the application rate of epoxy adhesive is 400-500 g / m². 2 The adhesive application process involves first applying adhesive and then scraping it off.

[0034] The further beneficial effect of the above-mentioned method is that by rationally controlling the amount of epoxy adhesive used, unnecessary waste can be reduced while ensuring product quality. Using a coating equipment, the deviation in adhesive application can be precisely controlled within 0.5%, thereby accurately controlling the mixing ratio of component A and component B in the epoxy adhesive. Simultaneously, the application process of coating first and then scraping ensures that the entire board surface is uniformly coated with epoxy adhesive. This invention optimizes the epoxy adhesive application process, improving the mixing uniformity, application uniformity, and stability of the adhesive application amount.

[0035] Furthermore, in step (3) above, the temperature for compounding is 30-35℃, the pressure is 2-3MPa, and the time is 12-16h.

[0036] The present invention also claims protection for an enamel composite board prepared by the above-described preparation method.

[0037] The present invention also claims protection for the use of an enamel composite panel prepared by the above-described method in interior decoration and curtain wall construction.

[0038] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] The enamel composite panel of this invention has excellent performance, with significantly improved bonding strength, weather resistance, and panel flatness. It is not only suitable for interior decoration but can also be widely used in building curtain walls, thereby expanding its application range and increasing its economic value. Attached Figure Description

[0040] Figure 1 is a schematic diagram of the structure of the enamel composite panel. Detailed Implementation

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0042] In the following examples, the manufacturer of NPEL-128 is Nan Ya Electronic Materials (Kunshan) Co., Ltd., and the product batch number is 20230523;

[0043] The manufacturer of SL-102C-2 is Taizhou Hengchuang Insulation Materials Co., Ltd., and the product batch number is HC 20230417.

[0044] The manufacturer of Kaneka MZ100 is Keneka, and the product batch number is MZ 22022.

[0045] The manufacturer of cashew phenol glycidyl ether is Shanghai Meidong Biotechnology Co., Ltd., and the product batch number is MD 20230413.

[0046] The manufacturer of γ-glycidyl ether propyltriethoxysilane is Nanjing Shuguang Silane Chemical Co., Ltd., and the product batch number is 20230312S.

[0047] The manufacturer of Silok 7631 is Guangzhou Silok New Material Co., Ltd., and the product batch number is 20.

[0048] The manufacturer of 800-mesh light calcium carbonate is Jiangxi Guangyuan Chemical Co., Ltd., and the product batch number is 20230610.

[0049] The manufacturer of Versamid 140 is GABRIEL, and the product batch number is V1002230201.

[0050] R-2269 is manufactured by Riki (Guangdong) Technology Co., Ltd., and its product batch number is R20230423.

[0051] The manufacturer of 2,4,6-tris(dimethylaminomethyl)phenol is EVONIK, and the product batch number is EK200323.

[0052] The manufacturer of the 1500 mesh talc powder is Jiangxi Guangyuan Chemical Co., Ltd., and the product batch number is 20230523.

[0053] Example 1

[0054] The preparation method of enamel composite board specifically includes the following steps:

[0055] (1) The enamel steel plate is sandblasted to a roughness of 1.5, coated with enamel material to a thickness of 100μm, fired at high temperature, stacked and pre-pressed under 2MPa pressure for 10min.

[0056] (2) The backing aluminum plate is sandblasted to a roughness of 1.5;

[0057] (3) The enamel steel plate, aluminum honeycomb core, and backing aluminum plate are laminated using epoxy adhesive. The application rate of epoxy adhesive is 400 g / m². 2 The adhesive application process involves first applying adhesive and then scraping it off. The composite temperature is 30℃, the pressure is 2MPa, and the time is 16h, which yields the enamel composite board.

[0058] The epoxy adhesive includes component A and component B in a mass ratio of 2:1.

[0059] Component A per 100g includes NPEL-128 30g, SL-102C-2 30g, kaneka MZ100 10g, cashew phenol glycidyl ether 10g, γ-glycidyl ether propyltriethoxysilane 4g, Silok 7631 1g and 800 mesh light calcium carbonate 15g;

[0060] Component B per 100g includes Versamid 140 40g, R-2269 20g, 2,4,6-tris(dimethylaminomethyl)phenol 4g, Silok 7631 1g and 1500 mesh talc 35g.

[0061] Example 2

[0062] The preparation method of enamel composite board specifically includes the following steps:

[0063] (1) The enamel steel plate was sandblasted to a roughness of 1.6, coated with enamel material to a thickness of 120μm, fired at high temperature, stacked and pre-pressed for 10min under a pressure of 2.5MPa.

[0064] (2) Sandblast the backing aluminum plate to a roughness of 1.6;

[0065] (3) The enamel steel plate, aluminum honeycomb core, and backing aluminum plate are laminated using epoxy adhesive. The application rate of epoxy adhesive is 450 g / m². 2 The adhesive application process involves first applying adhesive and then scraping it off. The lamination temperature is 32℃, the pressure is 2.5MPa, and the time is 14h, which yields the enamel composite board.

[0066] The epoxy adhesive includes component A and component B in a mass ratio of 2:1.

[0067] Component A per 100g includes NPEL-128 30g, SL-102C-2 30g, kaneka MZ100 10g, cashew phenol glycidyl ether 10g, γ-glycidyl ether propyltriethoxysilane 4g, Silok 7631 1g and 800 mesh light calcium carbonate 15g;

[0068] Component B per 100g includes Versamid 140 40g, R-2269 20g, 2,4,6-tris(dimethylaminomethyl)phenol 4g, Silok 7631 1g and 1500 mesh talc 35g.

[0069] Example 3

[0070] The preparation method of enamel composite board specifically includes the following steps:

[0071] (1) The enamel steel plate is sandblasted to a roughness of 1.7, coated with enamel material to a thickness of 150μm, fired at high temperature, stacked and pre-pressed under 3MPa pressure for 10min.

[0072] (2) The backing aluminum plate is sandblasted to a roughness of 1.7;

[0073] (3) The enamel steel plate, aluminum honeycomb core, and backing aluminum plate are laminated using epoxy adhesive. The application rate of epoxy adhesive is 500 g / m². 2 The adhesive application process involves first applying adhesive and then scraping it off. The lamination temperature is 35℃, the pressure is 3MPa, and the time is 12h, which yields the enamel composite board.

[0074] The epoxy adhesive includes component A and component B in a mass ratio of 2:1.

[0075] Component A per 100g includes NPEL-128 30g, SL-102C-2 30g, kaneka MZ100 10g, cashew phenol glycidyl ether 10g, γ-glycidyl ether propyltriethoxysilane 4g, Silok 7631 1g and 800 mesh light calcium carbonate 15g;

[0076] Component B per 100g includes Versamid 140 40g, R-2269 20g, 2,4,6-tris(dimethylaminomethyl)phenol 4g, Silok 7631 1g and 1500 mesh talc 35g.

[0077] Performance testing

[0078] 1. Determining the mixing ratio

[0079] The selected materials have no sandblasted bonding surfaces, and the adhesive application rate is 350g / m². 2 Curing conditions: 20℃, 12h, using traditional scraping adhesive process.

[0080] The test results are shown in Table 1.

[0081] The test standard for tensile strength is GB / T1452-2005 (Test Method for Tensile Strength of Sandwich Structures); the test standard for roller peel strength is GB / T1457-2005 (Test Method for Roller Peel Strength of Sandwich Structures).

[0082] Table 1. Effect of mixing ratio on tensile strength and roller peel strength (average)

[0083] As shown in Table 1, when the mass ratio of component A to component B in the epoxy adhesive is 2:1, the tensile strength and roller peel strength reach their optimal state, indicating that precise control of the amount of adhesive applied plays a relatively important role.

[0084] 2. Determination of the adhesive application process

[0085] The mass ratio of component A to component B in the epoxy adhesive is 2:1. The selected materials have no sandblasted bonding surfaces, and the application rate is 350g / m². 2 Curing conditions: 20℃, 12h.

[0086] The test results are shown in Table 2.

[0087] Table 2. Effect of sizing process on tensile strength and roller peel strength (average values)

[0088] Table 2 shows that under the glue coating method, the tensile strength and roller peel strength values ​​are relatively uniform, but overall low. Under the glue scraping method, the tensile strength and roller peel strength values ​​fluctuate significantly. Under the glue coating + scraping method, the tensile strength and roller peel strength values ​​are relatively uniform, and the strength is guaranteed.

[0089] 3. Determining the amount of adhesive to be applied

[0090] The mass ratio of component A to component B in the epoxy adhesive is 2:1. The selected material has no sandblasting on the bonding surface. The curing conditions are 20℃ for 12 hours, and the adhesive is applied using a spraying and scraping process.

[0091] The test results are shown in Table 3.

[0092] Table 3. Effect of sizing amount on tensile strength and roller peel strength (average)

[0093] Table 3 shows that the application rate is 500 g / m². 2 Within a certain range, tensile strength and roller peel strength show an increasing trend. The application rate is 500g / m². 2 At the above values, the increase in tensile strength and roller peel strength is not significant. Therefore, the application rate is determined to be 400-500 g / m². 2 .

[0094] 4. Determination of surface roughness

[0095] The epoxy adhesive has a component A to component B mass ratio of 2:1. Curing conditions: 20℃, 12 hours. A spraying + scraping process is used, with an application rate of 400-500 g / m². 2 .

[0096] The test results are shown in Table 4.

[0097] Table 4. Effect of roughness on tensile strength and roller peel strength (average values)

[0098] As shown in Table 4, increasing the surface roughness of the bonding surface between the enamel steel plate and the backing aluminum plate has a significant promoting effect on improving the tensile strength and the peel strength of the roller. However, the increase in roughness will invisibly increase the manufacturing cost. Considering the overall performance, a roughness of 1.5-1.7 is feasible.

[0099] 5. Determining the pressure and time

[0100] The mass ratio of component A to component B in the epoxy adhesive is 2:1. The surface roughness of the selected materials is 1.5-1.7. The curing conditions are 20℃ for 12 hours, using a spraying and scraping process, with an application rate of 400-500 g / m². 2 .

[0101] The test results are shown in Table 5.

[0102] Table 5. Effects of pressure and time on the flatness of the slabs after preloading and compositing.

[0103] As shown in Table 5, the greater the pre-compression forming pressure and the longer the holding time, the smaller the deformation and the flatter the plate. The required flatness can be achieved with a plate pressure of 2-3 MPa and a time of 10 minutes.

[0104] 6. Performance testing of enamel composite panels

[0105] The enamel composite panel prepared in Example 2 was applied to the exterior curtain wall, and its resistance to salt water, acid, alkali, adhesion, resistance to impact from hard objects, resistance to impact from soft heavy objects, combustion performance A, and temperature difference were tested respectively.

[0106] The test results are shown in Table 6.

[0107] Table 6 Performance Test Results of Enamelled Composite Panels for Exterior Curtain Walls

[0108] As shown in Table 6, through rigorous testing and experimentation, the enamel composite panel for exterior curtain walls of this invention exhibits excellent performance and safety characteristics under various harsh environments.

[0109] The above tests demonstrate that the enamel composite panel of this invention has excellent performance, with significantly improved bonding strength, weather resistance, and panel flatness. It is not only suitable for interior decoration but can also be widely used in building curtain walls, thereby expanding its application scope and increasing its economic value.

[0110] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for producing a enamel composite panel, characterized in that, Specifically, the following steps are included: (1) Sandblasting the enamel steel plate, spraying glaze, firing at high temperature, stacking and pre-pressing to shape; (2) Sandblast the backing aluminum plate; (3) The enamel steel plate, aluminum honeycomb core and backing aluminum plate are sequentially bonded together with epoxy adhesive to obtain the enamel composite plate.

2. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (1), the roughness of the enamel steel plate after sandblasting is 1.5-1.

7.

3. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (1), the coating thickness of the glaze is 100-150 μm.

4. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (1), the pressure of the pre-compression shaping is 2-3 MPa, and the time is more than 10 minutes.

5. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (2), the roughness of the sandblasting process to the backing aluminum plate is 1.5-1.

7.

6. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (3), the epoxy adhesive comprises component A and component B in a mass ratio of 2:1; By mass percentage, component A comprises 30%-40% epoxy resin, 30%-40% modified epoxy toughening agent, 5%-10% core-shell toughening particles, 5%-10% reactive diluent, 1%-5% silane coupling agent, 0.5%-1% wetting and dispersing agent, and 15%-25% filler; By mass percentage, component B comprises 30%-40% polyamide, 10%-20% modified amine, 1%-5% accelerator, 0.5%-1% wetting and dispersing agent, and 30%-40% filler; The epoxy resin is at least one of NPEL-128, EPOKIKDO YD-128, NPEF-170, YDF-170, DEN 431, and NPPN 631; The modified epoxy toughening agent is at least one of SL-102C-2, 102C-4H, 102C-4L, 102C-4T, 102C-4R, PD3604, PD3614, JEF-0211 and ERS-172; The core-shell toughening particles are at least one of Kaneka MZ100, Kaneka MZ200, Kaneka B-564, and Kaneka M-701; The active diluent is at least one of 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, cashew phenol diglycidyl ether, and pentaerythritol tetraglycidyl ether. The silane coupling agent is γ-glycidyl ether propyltriethoxysilane; The wetting and dispersing agent is at least one of BYK-2151, BYK-163, EFKA-4010 and Silok 7631; The filler is at least one of 150-mesh heavy calcium carbonate, 800-mesh light calcium carbonate, 1500-mesh talc, fumed silica, and kaolin. The polyamide is at least one of Versamid 140, WSCM-4140, D8140, Ancamide2784, G-640, G-0930 and G-5022; The modified amine is at least one of LT-477, SF-PAA-5035P, SF-PAA-4530, R-2269 and R-3611; The accelerator is at least one selected from 2,4,6-tris(dimethylaminomethyl)phenol, 2-ethyl-4-methylimidazolium, salicylic acid, triphenylphosphine, and 1,8-diazabicycloundec-7-ene.

7. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (3), the epoxy adhesive is applied at a quantity of 400-500 g / m 2 , and the application process is to apply the adhesive first and then to scrape the adhesive.

8. The method for preparing an enamel composite panel according to claim 1, characterized in that, In step (3), the temperature of the composite is 30-35℃, the pressure is 2-3MPa, and the time is 12-16h.

9. An enamel composite board prepared by the preparation method according to any one of claims 1-8.

10. The application of an enamel composite panel prepared by any one of claims 1-8 in interior decoration and curtain wall construction.

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