A preparation method of an aluminum honeycomb panel - slate composite panel

Abstract

This application relates to the field of processing of large composite boards, and more specifically, it relates to a preparation method of an aluminum honeycomb panel - stone composite board. The method includes the following steps: 1) Pretreat the surfaces of the aluminum honeycomb panel and several stone slabs respectively to obtain a pretreated aluminum honeycomb panel and stone slabs; 2) Attach several pretreated stone slabs to the pretreated aluminum honeycomb panel sequentially through an adhesive, and use an auxiliary bonding workpiece to adjust the distance between two adjacent stone slabs to be less than 1 mm, then perform vacuum pressing and curing to obtain a first composite board; 3) Level, clean and dry the edges of the first composite board to obtain a second composite board; 4) Fill the gaps between the second composite boards with a caulking adhesive, cure, clean and package to obtain the aluminum honeycomb panel - stone composite board. This application is for an ultra-large aluminum honeycomb panel - stone composite board, which has good structural stability, and the gaps are invisible within 1 m. At the same time, it is convenient for decoration of floors, walls, etc., improving its practicality.

Description

Technical Field

[0001] The present application relates to the field of processing of large composite plates, and more specifically, to a method for preparing an aluminum honeycomb panel - stone composite panel. Background Art

[0002] With the progress of society, people have become more and more strict about high - quality life. At the same time, the awareness of environmental protection and energy conservation of materials has increased, and the use of synthetic materials has gradually decreased, especially for stone - like imitations. Natural stone slabs are usually used for decorating walls, floors, etc. However, when processing large - area stone slabs, the stone slabs are prone to breakage during transportation, processing, or use, which affects their practicality.

[0003] Therefore, an aluminum honeycomb panel - stone composite panel is used to replace the stone slab. The aluminum honeycomb panel - stone composite panel is also called a stone - aluminum honeycomb panel, and is generally formed by bonding a stone material and an aluminum honeycomb panel with a special adhesive. It has the characteristics of light weight, small radiation pollution, saving stone materials, large panel size, flame retardancy, environmental protection, etc., and is used for decorating roofs, curtain walls, walls, floors, etc., so it is widely used in building decoration and other aspects.

[0004] Usually, the area of the aluminum honeycomb panel - stone composite panel is small, mostly within 1 m 2 When a larger wall or floor needs to be formed, several aluminum honeycomb panel - stone composite panels need to be spliced. For example, when a 6 m 2 wall needs to be formed, at least 6 aluminum honeycomb panel - stone composite panels need to be spliced. During the splicing process, it is difficult to control the size of the gaps formed, and visible gaps are also likely to be formed on the panel surface after filling the gaps. Therefore, it affects the decorative beauty of the aluminum honeycomb panel - stone composite panel. At the same time, during the splicing in the construction process, it is also easy to cause its structure to be unstable, and phenomena such as cracking and falling off are likely to occur. Summary of the Invention

[0005] In order to obtain an ultra - large aluminum honeycomb panel - stone composite panel, and at the same time improve the structural stability, invisibility of gaps, and construction convenience of the aluminum honeycomb panel - stone composite panel, the present application provides a method for preparing an aluminum honeycomb panel - stone composite panel.

[0006] The present application provides a method for preparing an aluminum honeycomb panel - stone composite panel, including the following steps:

[0007] 1) Level, clean, and dry the surfaces of the aluminum honeycomb panel and several stone slabs respectively to obtain a pretreated aluminum honeycomb panel and stone slabs;

[0008] 2) Attach several pre-treated stone slabs to the pre-treated aluminum honeycomb panel successively with adhesive. During the attachment process, use an auxiliary bonding workpiece to adjust the distance between adjacent two stone slabs to be less than 1 mm, then perform vacuum pressing and curing to obtain the first composite panel.

[0009] 3) Level, clean and dry the edges of the first composite panel to obtain the second composite panel.

[0010] 4) Fill the gaps between the second composite panels with caulking glue, then cure, grind, level, clean, dry and package to obtain the aluminum honeycomb panel - stone slab composite panel.

[0011] Using the above preparation method can obtain an extra-large aluminum honeycomb panel - stone slab composite panel, which has good structural stability, construction convenience and the gaps are invisible beyond 1 m.

[0012] Specifically, in 1), through treatment processes such as leveling, cleaning and drying, the adhesion of dust and other impurities on the surfaces of the aluminum honeycomb panel and the stone slab is reduced and made flat, which is convenient for subsequent stable bonding. In 2), the adhesive has good bonding effect, and with the assistance of vacuum, the aluminum honeycomb panel and the stone slab adhere stably, improving the structural stability of the aluminum honeycomb panel - stone slab composite panel. And adjusting the distance to less than 1 mm will reduce the possibility that the obtained extra-large aluminum honeycomb panel - stone slab composite panel has gaps and affects the overall aesthetics.

[0013] In 1), the first composite panel is further leveled, cleaned, dried and other processed to keep its surface clean, which is convenient for subsequent caulking treatment. In 4), after filling with caulking glue, the gaps are filled flat, reducing the possibility that the aluminum honeycomb panel - stone slab composite panel has gaps.

[0014] The "extra-large" in the extra-large aluminum honeycomb panel - stone slab composite panel obtained in this application means an aluminum honeycomb panel - stone slab composite panel with an area of more than 2 m 2 and even more than 5 m 2 of the aluminum honeycomb panel - stone slab composite panel.

[0015] In summary, through processes such as pre-treatment, adhesive bonding, vacuum pressing, gap adjustment, caulking glue filling, etc. in this application, several stone slabs are stably bonded to the aluminum honeycomb panel to form an extra-large aluminum honeycomb panel - stone slab composite panel, which is convenient for use in wall surface decoration, etc. At the same time, there are no obvious gaps on the panel surface, further improving the aesthetics of the aluminum honeycomb panel - stone slab composite panel.

[0016] Furthermore, the extra-large aluminum honeycomb panel - stone slab composite panel obtained in this application can be further spliced to form an ultra-large aluminum honeycomb panel - stone slab composite panel, and caulking glue is used to make the gaps invisible beyond 1 m, improving its aesthetics. However, the caulking glue prepared in this application needs to be used.

[0017] Preferably, the curing time in 2) is 4 to 8 h, and the curing temperature is 70 to 90 °C.

[0018] The above selection of curing time and temperature makes the obtained aluminum honeycomb panel - stone composite panel have better structural stability.

[0019] Preferably, the thickness of the aluminum honeycomb panel - stone composite panel is ≧5 mm; the area of the aluminum honeycomb panel is ≧2.4 m 2 .

[0020] Through the preparation method of the present application, stable bonding can be achieved for a thickness of 5 mm and above, forming a structurally stable and super - large aluminum honeycomb panel - stone composite panel. At the same time, it can ensure that the gaps on the panel surface are invisible beyond 1 m, improving the aesthetics and practicality of the super - large aluminum honeycomb panel - stone composite panel.

[0021] Preferably, the adhesive is composed of epoxy resin glue and a curing agent in a weight ratio of 100:(3 - 8).

[0022] Mixing epoxy resin glue and a curing agent in the above dosages further improves the bonding stability between the aluminum honeycomb panel and the stone slab, making the structure of the obtained super - large aluminum honeycomb panel - stone composite panel more stable. Since the main component of epoxy resin glue is epoxy resin and it has good waterproofness and adhesiveness, it further improves the layer structure stability of the super - large aluminum honeycomb panel - stone composite panel, reduces phenomena such as moisture absorption and collapse, and improves its practicality.

[0023] Preferably, the caulking adhesive is marble glue.

[0024] The marble glue used in the present application is a customized marble glue, and its color is similar to that of the stone slab. Therefore, after filling, it can not only make the adjacent stone slabs bond stably, but also reduce color difference, achieving invisible gaps beyond 1 m.

[0025] Preferably, the caulking adhesive is composed of component A and component B in a weight ratio of 100:(10 - 20); component A is composed of raw materials with the following weight percentages:

[0026] Water - based epoxy resin 40 - 55%

[0027] Water - based modified melamine formaldehyde resin 3 - 8%

[0028] Water - based acrylate emulsion 5 - 12%

[0029] Environment - friendly plasticizer 0.3 - 0.8%

[0030] Initiator 0.01 - 0.06%

[0031] First filler 3 - 8%

[0032] The remainder is water;

[0033] The B component is composed of the following raw materials by weight percentage:

[0034] Waterborne curing agent 15-22%

[0035] Second filler 30-50%

[0036] The remainder is water.

[0037] The selection of the above raw materials and their dosages are all within the preferred range of this application. The waterborne epoxy resin is a substance with water as the dispersant, having excellent room-temperature curability, fast curing speed, environmental protection, and drying and water resistance after curing. The waterborne epoxy resin in this application has a solid content of 53%, an epoxy equivalent of 900 g / eq, and a viscosity (25°C) of 6000 mPa·s; its brand is preferably Adicol EM1006 from Japan.

[0038] The waterborne acrylate emulsion is an acrylate copolymer self-crosslinking emulsion, prepared from monomers such as methyl acrylate, ethyl acrylate, acrylic acid, and methacrylate. It has good gloss, abrasion resistance, environmental protection, water resistance, etc. Its rotational viscosity (23°C, 60 rpm) is greater than or equal to 1000 mPa·s, and the solid content is 46%.

[0039] The waterborne modified melamine formaldehyde resin is a water-soluble etherified melamine resin prepolymer, a highly etherified melamine formaldehyde resin, MF resin, amino resin, having good stability and high gloss, and having crosslinking and compatibility with the raw material system of the A component; its preferred solid content in this application is 60, and the viscosity at 25°C is greater than or equal to 100 CPS. Its manufacturer can be selected as the one produced by Luoyang Ye Wan New Material Technology Co., Ltd.

[0040] The environmentally friendly plasticizer is preferably a citric acid-based plasticizer, synthetic plant ester, etc., such as trioctyl citrate, having good environmental protection and being able to improve the flexibility of the sealant after curing.

[0041] This application uses waterborne epoxy resin, waterborne modified melamine formaldehyde resin, and waterborne acrylate emulsion, combines their properties, and with the assistance of initiators, environmentally friendly plasticizers, first fillers, etc., prepares the A component, which has good adhesion and imitation stone slab effect. After being combined with the B component, the obtained sealant has good filling, adhesion, and environmental protection, and after filling and curing, it forms a color similar to that of the stone slab, achieving seamless connection.

[0042] The waterborne curing agent can promote the curing of Component A and improve the environmental friendliness of the raw material system, enabling the sealant to cure at room temperature or under heating conditions. The effective component of the waterborne curing agent is 70%, with a viscosity of 450 mPa·s at 25°C, an amine value of 320 mgKOH / g, and an active hydrogen equivalent of 115 g / eq. The preferred brand is Adeka WEH-102 from Japan.

[0043] By mixing the waterborne curing agent and the second filler to form Component B, and then compounding it with Component A, the resulting sealant has good filling performance, adhesion, and environmental friendliness. Under the action of the second filler, its glossiness is close to that of the stone material. Therefore, after filling and curing, it forms a color similar to that of the slate, achieving seamless connection, further enhancing the aesthetics of the aluminum honeycomb panel - slate composite panel, and also further improving the bonding stability and waterproofness between the slates, reducing the possibility of cracking.

[0044] Preferably, both the first filler and the second filler are composed of the following raw materials in parts by weight:

[0045] Micro - powdered fluorinated modified wax: 1 - 8 parts

[0046] Alkylphenol polyoxyethylene ether: 0.5 - 3 parts

[0047] Anti - sagging aid: 0.5 - 2 parts

[0048] Stone powder: 10 - 20 parts

[0049] Colorant: 0 - 3 parts.

[0050] The above raw materials are the preferred choices for this application. Among them, the micro - powdered fluorinated modified wax is a waterborne fluorinated modified wax with good slip and abrasion resistance, and is easy to disperse. It interacts with the colorant, stone powder, etc., making the color and color tone of the sealant similar to that of marble. The particle size of the micro - powdered fluorinated modified wax is 1 - 10 microns, and the preferred brand is Lencolo 8412W.

[0051] Alkylphenol polyoxyethylene ether acts as a surfactant, which can further improve the dispersibility of the raw material system. Its HLB value is 13.4 - 14.

[0052] The brand and model of the anti - sagging aid are Tokuyama QS - 10LS from Japan, which has advantages such as good dust prevention, thickening, anti - sagging, and thixotropy.

[0053] The stone powder is generally selected according to the stone material to be processed, usually being the powder generated during the processing of the slate or the powder formed by grinding the slate.

[0054] The colorant is also selected according to the color of the slate and used in combination with the micro - powdered fluorinated modified wax and stone powder.

[0055] In summary, the present application adjusts the color, brightness, etc. of its caulking agent through micronized fluorine-modified wax, micronized fluorine-modified wax, stone powder, and colorant. With the auxiliary effect of anti-sagging agent and alkylphenol polyoxyethylene ether, the color and gloss of the first filler and the second filler formed are similar to the color of the stone. Then, by combining with the raw material systems of Group A and Group B, the color, glossiness, etc. of the cured caulking adhesive are closer to those of the slate, and the adhesiveness is better. Therefore, the seamless connection effect is better, making the obtained aluminum honeycomb panel-slate composite panel more beautiful and structurally stable.

[0056] Preferably, the mesh number of the stone powder is 200-1000 meshes; the stone powder is composed of one or more of quartz powder, marble powder, and granite powder.

[0057] The selection of the above mesh number of the stone powder can be better dispersed in the raw material system of the caulking adhesive, making the color and gloss of the cured caulking adhesive closer to those of the stone.

[0058] Preferably, the colorant is composed of one or more of lead chromate yellow, iron blue, cinnabar, red clay, realgar, malachite green, and stone powder.

[0059] Preferably, the caulking adhesive is obtained by the following preparation method:

[0060] Component A: By weight percentage, weigh waterborne epoxy resin, waterborne modified melamine formaldehyde resin, waterborne acrylate emulsion, environmental protection plasticizer, initiator, the first filler, and water, mix them evenly, heat to 55-65 °C, and stir for 1-2 h to obtain Component A;

[0061] Component B: By weight percentage, weigh waterborne curing agent, the second filler, and water, mix them evenly to obtain Component B; Mix Component A and Component B evenly at a weight ratio of 100:(10-20) to obtain the caulking adhesive.

[0062] The caulking adhesive obtained through the above preparation process is easy to fill into the gap, and has the advantages of short curing time and stable adhesion. At the same time, the color and glossiness after curing are similar to those of the slate, making the super-large aluminum honeycomb panel-slate composite panel present a better seamless connection effect.

[0063] Further, the colorant of the present application is a surface-treated colorant, and the specific process is as follows: Heat 1-3 parts of PE wax and 1-3 parts of carnauba wax to 90-120 °C, then add 0.1-0.5 parts of γ-glycidoxypropyltrimethoxysilane, stir evenly, then add 15-30 parts of the colorant, stir for 20-30 min, pulverize, and sieve through 200-1000 meshes to obtain the surface-treated colorant. After the surface treatment, the surface of the colorant has a certain wax type, so it is not easy to disperse and has good gloss, making the surface of the obtained sealant present an irregular dyeing effect after curing, and making the effect of imitating the color of the stone slab better. This surface-treated colorant is suitable for slate with patterns.

[0064] In summary, the present application has the following beneficial effects:

[0065] 1. Through processes such as pre-treatment, adhesive bonding, vacuum pressing, gap adjustment, and sealant filling, several stone slabs are stably bonded to the aluminum honeycomb panel to form a super-large aluminum honeycomb panel-stone slab composite panel, which is convenient for use in wall decoration and other aspects. At the same time, there are no obvious gaps on the panel surface, further improving the aesthetics of the aluminum honeycomb panel-stone slab composite panel. Specific Embodiments

[0066] The following further elaborates on the present application with reference to examples.

[0067] Sources of Some Raw Materials

[0068] The epoxy resin is epoxy resin E-44 adhesive, and the manufacturer is Jinan Qiwei Chemical Co., Ltd.;

[0069] The curing agent is Zaoqiang Weishuai Composite Materials Co., Ltd., and the model is epoxy resin curing agent;

[0070] The marble glue manufacturer is Handeli Glue Industry Co., Ltd. in Handan City, and the model is customized according to the surface color of the stone material. Its shear strength is 36 MPa and its tensile bond strength is 16 MPa;

[0071] The average molecular weight of PE wax is 20000-50000.

[0072] Preparation Example of Marble Glue

[0073] Preparation Example 1

[0074] A sealant is prepared by the following method:

[0075] Component A: By weight percentage, weigh 55% waterborne epoxy resin, 3% waterborne modified melamine formaldehyde resin, 5% waterborne acrylate emulsion, 0.3% environmentally friendly plasticizer (synthetic plant ester), 0.01% initiator (ammonium persulfate), 3% first filler, and 33.69% water, mix evenly, heat to 60 °C, and stir for 1.5 h to obtain Component A;

[0076] Component B: According to weight percentage, weigh 22% water-based curing agent, 50% second filler and 28% water and mix them evenly to obtain component B;

[0077] Component A and component B were mixed evenly at a weight (kg) ratio of 10:1 to obtain a sealant.

[0078] Preparation of the first filler: 100 kg of micronized fluorine-modified wax, 50 kg of alkylphenol polyoxyethylene ether, 50 kg of anti-sagging agent, and 1000 g of stone powder were weighed and mixed for 10 minutes to obtain the first filler.

[0079] Preparation of the second filler: 100 kg of micronized fluorine-modified wax, 50 kg of alkylphenol polyoxyethylene ether, 50 kg of anti-sagging agent, 1000 g of stone powder and 100 g of colorant were weighed and mixed for 10 minutes to obtain the first filler.

[0080] Among them, the stone powder is marble powder; the colorant is composed of lead chrome yellow, malachite green, and realgar in a weight (g) ratio of 1:0.3:0.7.

[0081] Preparation Examples 2-3

[0082] Preparation Examples 2 to 3 differ from Preparation Example 1 in that the amounts of raw materials used are different, as shown in Table 1.

[0083] Table 1 Amount of raw materials used in Preparation Examples 1 to 5

[0084]

[0085]

[0086] Preparation Example 6

[0087] The difference between Preparation Example 6 and Preparation Example 4 is that the color powder is a surface-treated color powder, and the surface treatment process is as follows: 1 kg of PE wax and 1 kg of carnauba wax are heated to 120°C, 0.3 kg of γ-glycidyloxypropyltrimethylsilane is added, and the mixture is stirred evenly. 20 kg of colorant is added, stirred for 30 minutes, crushed, and sieved through 500 mesh to obtain a surface-treated colorant.

[0088] Example

[0089] Example 1

[0090] An aluminum honeycomb panel-stone composite panel is prepared by the following method:

[0091] 1) Sand the surfaces and edges of the aluminum honeycomb panel, and the bottom surfaces and edges of the four stone slabs respectively using sandpaper to make their surfaces flat. Then rinse them with clean water to make them clean, and place them in an oven at 50°C until their surfaces are completely dry and the moisture on their surfaces evaporates. Alternatively, they can be exposed to the sun to completely evaporate the moisture on their surfaces, obtaining the pretreated aluminum honeycomb panel and stone slabs.

[0092] 2) First, place the pretreated aluminum honeycomb panel on the workbench, then coat the top surface of the pretreated aluminum honeycomb panel with the adhesive. Next, place the pretreated stone slabs on the pretreated aluminum honeycomb panel in sequence, making their bottom surfaces contact the adhesive. At the same time, assist with the bonding workpiece and adjust the distance between two adjacent stone slabs to 0.5 mm to obtain the composite panel to be pressed. Transfer the composite panel to be pressed to the vacuum pressing equipment through the conveying device, start the equipment, and perform pressing under a vacuum value of ~0.1 Mpa with a pressure of 20 kg to obtain the pressed composite panel. Transfer the pressed composite panel to the oven through the conveying device for curing. The curing time is 5 h and the curing temperature is 80°C to obtain the first composite panel.

[0093] 3) Sand the edges of the first composite panel using sandpaper to make its edges flat, then clean it with clean water, and then place it in an oven at 50°C for drying for 2 h to completely evaporate the moisture on its surface, obtaining the second composite panel.

[0094] 4) Through the caulking auxiliary workpiece, make the caulking glue completely fill the gaps between the second composite panels, and place them at room temperature to make them completely cured; or through heating, make the caulking glue cure quickly. No matter which method is adopted, when the caulking glue is completely cured, then level it to make the stone slab surfaces flat, rinse with clean water, then place it in the oven for drying, and finally package it to obtain the aluminum honeycomb panel - stone slab composite panel.

[0095] In the above process, large processing equipment is used, such as a large vacuum press, oven, etc.; the 2m * 3m super-large aluminum honeycomb panel - stone slab composite panel is made in this embodiment. The thickness of the aluminum honeycomb panel - stone slab composite panel is 10 mm, and the stone slabs use 6 pieces of 1m * 1m marble with a small amount of texture. The adhesive is obtained by mixing epoxy resin glue and curing agent evenly at a weight (kg) ratio of 20:1. The caulking glue is marble glue.

[0096] Examples 2 - 7

[0097] The differences between Examples 2 - 7 and Example 1 are: the sources of the caulking glue are different, as shown in Table 2 specifically;

[0098] Table 2 Caulking Glue for Examples 2 - 7

[0099]

[0100]

[0101] Comparative Example

[0102] Comparative Example 1

[0103] The difference between Comparative Example 1 and Example 1 is as follows: the number of slate is 1, and the size of the aluminum honeycomb panel is the same as that of the slate. The specific process is as follows:

[0104] 1) The surfaces of the aluminum honeycomb panel, the bottom surface and the edges of the slate were respectively polished with sandpaper, leveled, rinsed and dried to obtain a pretreated aluminum honeycomb panel and a slate;

[0105] 2) First, place the pretreated aluminum honeycomb panel on the operating table, then coat the top surface of the pretreated aluminum honeycomb panel with the adhesive, and then place the pretreated slate on the pretreated aluminum honeycomb panel in sequence so that its bottom surface contacts the adhesive to obtain a composite panel to be pressed. The composite panel to be pressed is conveyed to the vacuum pressing equipment through the conveying device, and the equipment is started to perform pressing under a vacuum value of ~0.1 Mpa and a pressure of 20 kg to obtain a pressed composite panel. The pressed composite panel is conveyed to the oven through the conveying device for curing. The curing time is 5 h and the curing temperature is 80 °C to obtain an aluminum honeycomb panel - slate composite panel.

[0106] Comparative Example 2

[0107] The difference between Comparative Example 2 and Example 1 is that the aluminum honeycomb panel - slate composite panel is a marble slab.

[0108] Comparative Example 3

[0109] The difference between Comparative Example 3 and Example 1 is that the spacing is 2 mm.

[0110] Performance Detection Test

[0111] Detection Method / Test Method

[0112] Physical Properties (I)

[0113] The aluminum honeycomb panel - slate composite panels obtained in Example 1 and Comparative Examples 1 - 3 were laid on a 2m * 3m ground. The aluminum honeycomb panel - slate composite panel of Comparative Example 1 was laid by splicing and filled with marble glue until completely cured. From the perspective of laying alone, the aluminum honeycomb panel - slate composite panel of the present application can be produced according to the size of the ground or its wall surface and can be directly used when installed or laid. However, the size of the composite panel in Comparative Example 1 is smaller, and splicing is required during installation. It is difficult to control the spacing between the composite panels and the connection stability of the composite panels during on-site splicing. Then, the aluminum honeycomb panel - slate composite panels obtained in Examples 1 - 7 and Comparative Examples 1 - 3 were subjected to performance detection:

[0114] (1) The observer stands vertically, observes the surface of the floor covered with the aluminum honeycomb panel - stone composite panel at a horizontal distance of 1 m from the floor with the line of sight parallel to the ground, and checks whether there are visible gaps (referring to lines longer than 50 cm). The observer must wear corrective glasses.

[0115] (2) A 20 - kg lead ball is dropped freely from a height of 2 m and hits the surface of the floor covered with the aluminum honeycomb panel - stone composite panel three times. Each hitting area is different. Observe whether there are phenomena such as dents and cracks on the surface of the floor covered with the aluminum honeycomb panel - stone composite panel. When such phenomena occur, it is recorded as unqualified.

[0116] Table 3 Experimental data of Example 1 and Comparative Examples 1 - 3

[0117] Example Observation Experiment (1) Free Fall Experiment Example 1 Qualified Qualified Comparative Example 1 Unqualified Unqualified Comparative Example 2 Qualified Unqualified Comparative Example 3 Unqualified Qualified

[0118] Combining Example 1 and Comparative Examples 1 - 2 and referring to Table 1, it can be seen that in Comparative Example 1, the splicing method is used during construction, and it is difficult to adjust the gap to less than 1 mm. At the same time, the filling process is also likely to result in visible gaps. In Example 2, forming large marble slabs not only takes a lot of time but also is prone to cracking, and some even crack during transportation or processing. In Comparative Example 3, the gap is relatively large, and the formed gap is more likely to produce color differences with adjacent stone slabs, making the gap more obvious and easier to observe.

[0119] Physical Test (2)

[0120] 1. Place the aluminum honeycomb panel - stone composite panels obtained from Examples 1 - 7 vertically. The observer stands at 1 m and 0.5 m respectively to observe their surfaces. When a gap longer than 0.5 m is observed on the panel surface, it is a visible gap; when it is less than 0.5 m, it is an invisible gap. The observer must wear corrective glasses.

[0121] 2. Take the gap and the area 3 cm away from the gap of the aluminum honeycomb panel - stone composite panels of Examples 1 - 7, and use the LS192 Linshang marble glossiness tester to measure the corresponding glossiness. When testing, the light is aligned with the gap. The glossiness at a distance of 3 cm from the gap is recorded as A1, and the glossiness at the gap is recorded as A2. The glossiness difference = |A1 - A2|. Each is tested in 3 groups and the average value is taken. At the same time, use the Linshang LS175 handheld color difference meter to detect the color difference between the gap and the area 3 cm away from the gap of the aluminum honeycomb panel - stone composite panels of Examples 1 - 7. Read the values three times. The specific data are shown in Table 4.

[0122] Table 4 Experimental data of Examples 1 - 7

[0123]

[0124]

[0125] As can be seen from the above table, for the aluminum honeycomb panel - slate composite panel prepared in this application, its gaps are invisible when the gap width is 1 m, while in Examples 2 - 7, the gaps are invisible when the gap width reaches 0.5 m. At the same time, the color difference and gloss difference of this application are similar. Therefore, it is generally difficult to observe the gaps of the obtained ultra - large aluminum honeycomb panel - slate composite panel, improving its aesthetics.

[0126] This specific embodiment is only an interpretation of this application and does not limit this application. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A preparation method of an aluminum honeycomb panel - slate composite panel, characterized in that, It includes the following steps: 1) Level, clean and dry the surfaces of the aluminum honeycomb panel and several stone slabs respectively to obtain a pretreated aluminum honeycomb panel and stone slabs; 2) Attach several pretreated stone slabs to the pretreated aluminum honeycomb panel successively through an adhesive. During the attachment process, use an auxiliary bonding workpiece to adjust the distance between two adjacent stone slabs to be less than 1 mm, then perform vacuum pressing and curing to obtain a first composite panel; 3) Level, clean and dry the edges of the first composite panel to obtain a second composite panel; 4) Fill the gaps between the second composite panels with a caulking adhesive, cure, grind, level, clean, dry and package to obtain an aluminum honeycomb panel-stone slab composite panel; The caulking adhesive is composed of component A and component B in a weight ratio of 100:(10 - 20); Component A is composed of the following raw materials in weight percentages: Water-based epoxy resin: 40 - 55% Water-based modified melamine formaldehyde resin: 3 - 8% Water-based acrylate emulsion: 5 - 12% Environmentally friendly plasticizer: 0.3 - 0.8% Initiator: 0.01 - 0.06% First filler: 3 - 8% The balance is water; Component B is composed of the following raw materials in weight percentages: Water-based curing agent: 15 - 22% Second filler: 30 - 50% The balance is water; Both the first filler and the second filler are composed of the following raw materials in weight parts: Micronized fluorine-modified wax: 1 - 8 parts Alkylphenol polyoxyethylene ether: 0.5 - 3 parts Anti-sagging aid: 0.5 - 2 parts Stone powder: 10 - 20 parts Colorant: 0 - 3 parts.

2. The preparation method of an aluminum honeycomb panel - slate composite panel according to claim 1, characterized in that: The curing time in step 2) is 4 - 8 h, and the curing temperature is 70 - 90 °C.

3. The preparation method of an aluminum honeycomb panel - slate composite panel according to claim 1, characterized in that: The thickness of the aluminum honeycomb panel - slate composite panel is ≥ 5 mm; the area of the aluminum honeycomb panel is ≥ 2.4 m 2 .

4. The preparation method of an aluminum honeycomb panel - slate composite panel according to claim 1, characterized in that: The adhesive is composed of epoxy resin adhesive and curing agent in a weight ratio of 100:(3 - 8).

5. The preparation method of an aluminum honeycomb panel - slate composite panel according to claim 1, characterized in that: The mesh number of the stone powder is 200 - 1000 mesh; The stone powder is composed of one or more of quartz powder, marble powder, and granite powder.

6. The preparation method of an aluminum honeycomb panel - slate composite panel according to claim 1, characterized in that: The colorant is composed of one or more of lead chromate yellow, iron blue, cinnabar, red clay, realgar, and malachite green.

7. A method for preparing an aluminum honeycomb panel - slate composite panel according to any one of claims 1 to 6, characterized in that, The caulking adhesive is obtained by the following preparation method: Component A: Weigh water-based epoxy resin, water-based modified melamine formaldehyde resin, water-based acrylate emulsion, environmentally friendly plasticizer, initiator, first filler, and water according to weight percentages, mix them evenly, heat to 55 - 65 °C, and stir for 1 - 2 h to obtain component A; Component B: Weigh water-based curing agent, second filler, and water according to weight percentages, mix them evenly to obtain component B; Mix component A and component B evenly in a weight ratio of 100:(10 - 20) to obtain the caulking adhesive.

Images