A composite board, furniture and a door panel

Abstract

The present invention provides a composite board, a piece of furniture, and a door panel. The composite board includes a base material and a ceramic substrate. The base material has a first surface and a second surface. The ceramic rock board is attached to the first surface of the base material. The ratio of the water absorption thickness swelling rate of the base material to the water absorption thickness swelling rate of the ceramic rock board is in the range of 0.05 to 20. Since the ceramic rock board is attached to the surface of the base material, the ceramic rock board can prevent scratches or cracks from appearing on the surface of the composite board. In addition, since the ratio of the water absorption thickness swelling rate of the base material to the water absorption thickness swelling rate of the ceramic rock board is in the range of 0.05 to 20, that is, the ratio of the water absorption dimensional changes of the base material and the ceramic rock board is small, it can avoid the phenomenon of delamination and breakage of the composite board caused by using cooling water for cooling during the cutting process of the composite board.

Description

Technical Field

[0001] The present invention belongs to the technical field of board materials, and particularly relates to a composite board, a furniture and a door panel. Background Art

[0002] With the improvement of living standards, people's requirements for the quality of life are also getting higher and higher. For furniture, people not only require the furniture board to be more beautiful, but also require the furniture board to have better quality. In order to meet the needs of customers, furniture manufacturers have developed various styles of composite boards to meet the requirements of both aesthetics and quality. A commonly used composite board is a wood and ceramic composite board, that is, a ceramic panel is covered on the surface of a wooden substrate to meet the requirements of both aesthetics and quality. However, in the wood and ceramic composite board, due to the relatively brittle texture of the ceramic panel, it is not suitable for mechanical processing to cut out various shapes to meet the needs of furniture. Even if the ceramic panel is reluctantly cut with a cutting tool, since water is usually used as a coolant in the process of ceramic cutting, the expansion coefficient differences of the wooden substrate and the ceramic panel after water absorption are relatively large, so that the wooden substrate and the ceramic panel are prone to delamination during the cutting process of the composite board (wooden substrate + ceramic panel), resulting in damage to the composite board. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a composite board to solve the problems that the processing performance of the existing wood and ceramic composite board is not good, and the wooden substrate and the ceramic panel are prone to delamination due to the easy water absorption of the wooden substrate during the water-cooled cutting process of the composite board.

[0004] One embodiment of the present invention provides a composite board, including: a substrate having a first surface and a second surface; and a ceramic rock board attached to the first surface of the substrate; wherein, the ratio of the water absorption thickness expansion rate of the substrate to the water absorption thickness expansion rate of the ceramic rock board is in the range of 0.05 to 20.

[0005] In one embodiment, the composite board further includes: a first adhesive layer disposed between the substrate and the ceramic rock board.

[0006] In one embodiment, the composite board further includes: a lining board attached to the second surface of the substrate.

[0007] In one embodiment, the composite board further includes: a second adhesive layer disposed between the substrate and the lining board.

[0008] In one embodiment, the production material of the first adhesive layer and / or the second adhesive layer includes a reactive polyurethane hot melt adhesive material.

[0009] In one embodiment, the thickness of the base material is in the range of 9 to 40 mm; and / or, the thickness of the ceramic rock board is in the range of 1 to 6 mm.

[0010] In one embodiment, the thickness ratio of the ceramic rock board to the lining board is n:1, where the value of n is in the range of 2 to 10.

[0011] In one embodiment, a glue laying groove is provided on the first surface of the base material, and the first glue layer is partially accommodated in the glue laying groove.

[0012] In one embodiment, the glue laying groove is of a wavy structure, the wave height of the glue laying groove is in the range of 0.8 to 1.2 mm, and the wavelength of the glue laying groove is in the range of 1.2 to 1.8 mm.

[0013] In one embodiment, the glue laying groove includes a plurality of linear grooves, and the plurality of linear grooves are arranged in parallel;

[0014] and / or, the glue laying groove includes a plurality of annular grooves, and the sizes of the plurality of annular grooves gradually increase from inside to outside; and / or, the glue laying groove includes a plurality of groove points, and the first glue layer is partially accommodated in the groove points.

[0015] In one embodiment, the base material is a straw board.

[0016] In one embodiment, the thickness swelling rate of the straw board after water absorption is less than or equal to 0.6%; and / or, the thickness swelling rate of the composite board after water absorption is less than or equal to 0.1%; and / or, the length change rate or width change rate of the straw board after water absorption is less than or equal to 0.4%.

[0017] In one embodiment, the ratio of the water absorption rate of the straw board to the water absorption rate of the ceramic rock board is in the range of 0.05 to 20.

[0018] In one embodiment, the water absorption rate of the straw board is less than or equal to 0.5%; and / or, the water absorption rate of the ceramic rock board is less than or equal to 0.05%; and / or, the water absorption rate of the composite board is less than or equal to 0.1%.

[0019] In one embodiment, the nail-holding force on the surface of the composite board is greater than or equal to 12 N / mm 2 ; and / or, the nail-holding force on the edge of the composite board is greater than or equal to 8 N / mm 2 .

[0020] In one embodiment, the fireproof performance of the composite board includes: the combustion growth rate of the composite board is less than or equal to 250 W / s;

[0021] And / or, the lateral flame spread range of the composite board is less than or equal to the edge of the composite board; and / or, when the composite board is exposed to the burner flame, the total heat release in the first 600 seconds is less than or equal to 15 MJ.

[0022] In one embodiment, the formaldehyde release amount of the composite board is less than or equal to 0.06 mg / m 3 .

[0023] In one embodiment, the density of the straw board is in the range of 0.4 to 0.8 g / cm 3 .

[0024] In one embodiment, the base material is a foam aluminum plate.

[0025] In one embodiment, the foam aluminum plate has a closed-cell structure; and / or, the porosity of the foam aluminum plate is in the range of 80% to 90%; and / or, the pore diameter of the foam aluminum plate is in the range of 0.4 to 5 mm.

[0026] In one embodiment, the ratio of the thermal expansion coefficient of the foam aluminum plate to the thermal expansion coefficient of the first ceramic rock plate is in the range of 0.2 to 5.

[0027] In one embodiment, the thickness of the foam aluminum plate is in the range of 12 to 40 mm; and / or, the thickness of the first ceramic rock plate is in the range of 3 to 6 mm.

[0028] In one embodiment, the nail-holding force of the surface of the composite board is greater than or equal to 10 N / mm 2 .

[0029] In one embodiment, the lining board includes a second ceramic rock plate; and / or, the thickness of the lining board is less than or equal to the thickness of the first ceramic rock plate.

[0030] In one embodiment, the first surface of the foam aluminum plate has a porous structure, and the first adhesive layer is partially disposed in the porous structure.

[0031] In one embodiment, the density of the foam aluminum plate is in the range of 0.2 to 0.4 g / cm 3 .

[0032] Another embodiment of the present invention further provides a piece of furniture, including a composite board. The composite board is the composite board described in any one of the above embodiments.

[0033] Another embodiment of the present invention further provides a door panel, including a composite board. The composite board is the composite board described in any one of the above embodiments.

[0034] In one embodiment, the door panel further includes: an edge banding strip attached to the outer periphery of the door panel.

[0035] In one embodiment, the edge banding strip includes an outer surface layer, and the outer surface layer is an aluminum sheet, an aluminum alloy sheet or an ABS plastic sheet.

[0036] In one embodiment, the edge banding strip further includes a PVC adhesive layer, and the PVC adhesive layer is disposed on the side where the outer surface layer is attached to the outer periphery of the door panel.

[0037] The composite board, furniture or door panel provided by the above embodiments of the present invention has the following beneficial effects:

[0038] 1. Since the ceramic rock board is attached to the surface of the base material, the ceramic rock board can improve the aesthetics and strength of the board surface, make the surface style of the board more diverse, so as to meet the appearance requirements of different people for the board, and further highlight the luxury and high-grade degree of the furniture. On the other hand, due to the high hardness and good wear resistance of the ceramic rock board itself, it can effectively prevent scratches or cracks on the board surface, so that the manufactured composite board has good stability.

[0039] 2. Since the ratio of the water absorption thickness swelling rate of the base material to the water absorption thickness swelling rate of the ceramic rock board is in the range of 0.05 to 20, the mechanical property difference between the base material and the ceramic rock board is small, thus avoiding the phenomenon that the composite board is damaged due to delamination of the base material and the ceramic rock board during long-term use. In particular, during the process of cutting the composite board, even if the ceramic rock board needs to be sprayed with water for cooling or dust removal during cutting, due to the low water absorption thickness swelling rate of the base material, the composite board is not likely to delaminate between the base material and the ceramic rock board during cutting, resulting in damage to the composite board.

[0040] 3. Since a lining board is attached to the other surface of the base material, the lining board can effectively protect the base material and prevent the lining board from being corroded. In particular, since one surface of the base material is covered by the ceramic rock board and the other surface is covered by the lining board, this setting method can further improve the waterproof performance of the composite board, thus further avoiding the phenomenon that the manufactured composite board delaminates and is damaged due to the different water absorption expansion rates of the base material and the ceramic rock board during use or cutting.

[0041] 4. The substrate is bonded to the ceramic rock board and the lining board through the first adhesive layer and the second adhesive layer respectively. The first adhesive layer or the second adhesive layer can be made of PUR hot melt adhesive material. Since the PUR hot melt adhesive material does not contain organic solvents, the colloid can be coated at a relatively low temperature. After the colloid is coated and cooled and solidified, the preliminary bonding can be completed. In the subsequent process, the PUR hot melt adhesive material will undergo moisture curing in the air and has excellent bonding strength and impact resistance after complete curing. Therefore, by using the PUR hot melt adhesive material to bond the substrate to the ceramic rock board and the lining board, the formed composite board has a relatively high bonding strength.

[0042] 5. In one embodiment, the substrate is made of a straw board. The straw board can effectively improve the nail-holding force of the composite board, thereby making the machining performance of the formed composite board better. In addition, the density of the straw board is set within the range of 0.4 to 0.8 g / cm 3 so as to ensure that the formed composite board has a relatively high nail-holding force while its overall weight is not too large. In one embodiment, when using a straw board as the substrate and compounding it with a ceramic rock board, the nail-holding force of the surface of the composite board is greater than or equal to 12 N / mm 2 , and the nail-holding force of the edge of the composite board is greater than or equal to 8 N / mm 2 ; and the composite board also has better fire resistance and less formaldehyde release. At this time, the composite board made of the straw board and the ceramic rock board is particularly suitable for making furniture.

[0043] 6. In one embodiment, the substrate is made of a foam aluminum plate. Due to the relatively stable properties of the foam aluminum plate, the dimensional change rate after water absorption is small. After it is compounded with the ceramic rock board, the machining performance of the formed composite board is good. During the process of cutting and processing the composite board, even if water spraying is required for cooling or dust removal during the cutting of the ceramic rock board, since the size of the foam aluminum plate basically does not change much after water absorption, the composite board is not prone to delamination of the foam aluminum plate and the ceramic rock board during the cutting process, resulting in damage to the composite board.

[0044] 7. Using a foam aluminum plate as the substrate of the composite board can improve the nail-holding force of the formed composite board. Since there are many pore structures with different sizes and irregular shapes inside the foam aluminum plate, when the screw penetrates into the inside of the foam aluminum plate, the inner walls of the pore structures with different sizes and irregular shapes can hold the screw, thereby effectively improving the nail-holding force of the foam aluminum plate.

[0045] 8. Using a foam aluminum plate as the substrate of the composite board, due to the relatively small density and light weight of the foam aluminum plate, the weight of the composite board can be effectively reduced. In one embodiment, the density of the foam aluminum plate is set within the range of 0.2 to 0.4 g / cm 3Within the range. The density of the foam aluminum plate is set within 0.2 to 0.4 g / cm 3 Within the range, it can ensure that while the composite board has a high nail-holding force, its weight will not be too large. At this time, the composite board made of the foam aluminum plate and the ceramic rock board is particularly suitable for preparing door panels.

[0046] 9. The foam aluminum plate has a closed-cell structure. By setting the foam aluminum plate into a closed-cell structure, the nail-holding force of the foam aluminum plate can be further improved, and the machinability of the foam aluminum plate can be enhanced. In addition, by selecting a foam aluminum plate with a pore diameter in the range of 0.4 to 5 mm, since the pore diameter of the pores therein is small, it can also improve the nail-holding force of the foam aluminum plate.

[0047] 10. When using the foam aluminum plate as the base material of the composite board and bonding the foam aluminum plate and the ceramic rock board with the first adhesive layer, the pore structure on the surface of the foam aluminum plate can increase the contact area between the first adhesive layer and the foam aluminum plate, thereby making the bonding performance between the foam aluminum plate and the ceramic rock board better. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0049] Figure 1 It is a schematic structural diagram of the composite board provided by the embodiment of the present invention;

[0050] Figure 2 It is a schematic structural diagram of the straw board provided by another embodiment of the present invention;

[0051] Figure 3 is Figure 2 a top view schematic diagram of the straw board in

[0052] Figure 4 is Figure 2 a schematic structural diagram of the straw board after attaching the ceramic rock board and the lining board in

[0053] Figure 5 It is a schematic structural diagram of the straw board provided by still another embodiment of the present invention;

[0054] Figure 6 It is a schematic structural diagram of the straw board provided by yet another embodiment of the present invention;

[0055] Figure 7 It is a schematic structural diagram of the composite board provided by another embodiment of the present invention;

[0056] Figure 8 is Figure 7 a schematic diagram of the porous structure on the surface of the foamed aluminum plate in

[0057] Figure 9 is Figure 7 a schematic diagram of the porous structure when a glue-laying groove is arranged on the surface of the foamed aluminum plate in

[0058] Figure 10 a schematic diagram of the structure of the door panel provided by another embodiment of the present invention;

[0059] Figure 11 is Figure 10 an enlarged schematic diagram of area A of the door panel in Specific embodiments

[0060] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0061] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] Please refer to Figure 1 , one embodiment of the present invention provides a composite board 100, which includes a base material 110 and a ceramic rock board 120.

[0064] The substrate 110 has a first surface 111 and a second surface 112.

[0065] The ceramic rock slab 120 is attached to the first surface 111 of the substrate 110.

[0066] Wherein, the ratio of the water absorption thickness swelling rate of the substrate 110 to the water absorption thickness swelling rate of the ceramic rock slab 120 is in the range of 0.05 to 20.

[0067] In the composite board 100 provided in this embodiment, since the ceramic rock slab 120 is attached to the surface of the substrate 110, the ceramic rock slab 120 can improve the appearance and strength of the board surface, make the surface style of the board more diversified, so as to meet the appearance requirements of different people for the board, and further highlight the luxury and high-grade degree of the furniture. On the other hand, due to the high hardness and good wear resistance of the ceramic rock slab 120 itself, it can effectively prevent scratches or cracks on the board surface, so that the manufactured composite board has good stability.

[0068] In addition, since the ratio of the water absorption thickness swelling rate of the substrate 110 to the water absorption thickness swelling rate of the ceramic rock slab 120 is in the range of 0.05 to 20, the mechanical property difference between the substrate 110 and the ceramic rock slab 120 is small, thus avoiding the phenomenon that the composite board 100 is damaged due to delamination of the substrate 110 and the ceramic rock slab 120 during long-term use. In particular, during the process of cutting the composite board 100, even if the ceramic rock slab 120 needs to be sprayed with water for cooling or dust removal during cutting, due to the low water absorption thickness swelling rate of the substrate 110, the composite board 100 is not prone to delamination of the substrate 110 and the ceramic rock slab 120 during cutting, resulting in damage to the composite board 100.

[0069] In this embodiment, the substrate 110 is a straw board. The straw board is a kind of excellent artificial composite board made from agricultural production residues such as wheat straw, corn straw, sorghum straw, rice straw, sugarcane bagasse, etc. This board is relatively environmentally friendly, waterproof, fireproof, and belongs to renewable resources. At the same time, the price of the straw board is relatively low, which can reduce the production cost of the composite board. In the actual manufacturing process of the straw board, after removing impurities such as soil from the wheat straw raw material, through processes such as mechanical crushing, screening, drying, mixing, paving, rolling, sawing the edges, and inspection, the finished board can be finally obtained. In this embodiment, the straw board 110 is made of valley wood biomass materials, which are processed by high temperature, high pressure, and mechanical extrusion technology from nearly 60% straw raw materials, more than 30% common salts and mineral oil synthetic substances.

[0070] The ceramic rock slab 120 is attached to the first surface of the straw board 110. A porcelain slab refers to a new type of plate-shaped inorganic material mainly made of clay and other inorganic non-metallic materials, which is produced through manufacturing techniques such as forming, drying, and high-temperature sintering. The body and the surface color of the porcelain slab are the same, and it can be processed by cutting, drilling, grinding, etc. according to design requirements. Ordinary ceramic plates or ceramic chips are difficult to implement mechanical processing techniques such as cutting and drilling due to their brittle texture and low strength, so as to meet the needs of various types of furniture. However, porcelain slabs can be processed by techniques such as cutting and drilling according to design requirements due to their high hardness, good impact resistance, and wear resistance. Therefore, the composite board made of the straw board 110 and the ceramic rock slab 120 can also be processed by cutting, drilling, grinding, etc. according to requirements, so as to meet the different types of furniture needs.

[0071] In the composite board 100 provided in this embodiment, since the straw board 110 is used as the base material inside the composite board 100, the straw board 110 can effectively improve the nail-holding force of the composite board 100, so that the prepared composite board 100 is easy to be spliced and assembled with screws, etc.

[0072] The water absorption thickness swelling rate refers to the ratio of the thickness difference of a certain amount of sample before and after water absorption measured after soaking the sample in water for a certain time according to the specified method to the thickness before water absorption. Since the humidity in the air often changes and furniture boards may often come into contact with water, the water absorption thickness swelling rate is an important evaluation factor for furniture boards. Generally, the mechanical properties of ceramic materials are relatively stable, and their water absorption thickness swelling rate is small. However, for conventional wood-based boards, their dimensions are prone to swelling after water absorption, resulting in a large water absorption thickness swelling rate. The water absorption thickness swelling rate of general wood-based boards may exceed 10% or more, while the water absorption thickness swelling rate of ceramic materials is generally less than 0.1%. The ratio of the water absorption thickness swelling rates of the two is relatively large. Therefore, for composite boards made of conventional wood-based substrates and ceramic materials, due to the large ratio of the water absorption thickness swelling rates of the two, after long-term use, the wood-based substrate and the ceramic materials are prone to delamination, resulting in damage to the composite board. In this embodiment, since the ratio of the water absorption thickness swelling rates of the straw board 110 and the ceramic rock slab 120 is within the range of 0.05 to 20, it can avoid the phenomenon that the composite board 100 is damaged due to the delamination of the straw board 110 and the ceramic rock slab 120 during long-term use.

[0073] In one embodiment, the density of the straw board 110 is set within the range of 0.4 to 0.8 g / cm 3 range. The density of the straw board 110 is set within the range of 0.4 to 0.8 g / cm3 Within this range, it can ensure that while having a high nail-holding force, the overall weight of the composite board 100 will not be too large. For example, when the density of the straw board 110 is set to 0.4 g / cm 3 ³, the overall mass of the composite board 100 is relatively light and is suitable for the side panels and door panels of furniture. At this time, while ensuring the nail-holding force, the use process of the composite board 100 is also relatively light. When the density of the straw board 110 is 0.8 g / cm 3 ³, the overall mass of the composite board 100 is increased and is suitable for the tabletop panels of furniture. At this time, the overall composite board 100 is relatively thick and safe, and its load-bearing capacity is also increased.

[0074] In one embodiment, the composite board 100 further includes a backing board 130. The backing board 130 is attached to the second surface 112 of the straw board 110 opposite to the first surface 111. Specifically, the thickness ratio of the ceramic rock board 120 to the backing board 130 is n:1, where the value range of n is within the range of 2 to 10. By attaching the backing board 130 to the second surface 112 of the straw board 110 opposite to the first surface 111, on the one hand, the backing board 130 can effectively protect the straw board 110 and prevent the straw board 110 from being corroded; on the other hand, since the two surfaces of the straw board 110 are respectively covered by the ceramic rock board 120 and the backing board 130, the waterproof performance of the composite board 100 can be further improved. At this time, during the use of the composite board 100, it is not easy to cause the composite board 100 to delaminate and break due to the difference in the water absorption expansion rates of the ceramic rock board 120 and the straw board 110.

[0075] In this embodiment, the water absorption thickness expansion rate of the straw board 110 is less than or equal to 0.6%. Since the water absorption thickness expansion rate of the straw board 110 is less than or equal to 0.6%, it can be fully adapted to the water absorption thickness expansion rate of the ceramic rock board 120. As needed, the water absorption thickness expansion rate of the composite board 100 is less than or equal to 0.1%. In one specific implementation manner, the water absorption thickness expansion rate of the composite board 100 is 0.07%. In addition to the consideration factor of the water absorption thickness expansion rate, the water absorption dimensional change rate in the length direction or the width direction is also an important consideration factor for furniture boards. As needed, the water absorption length change rate or the water absorption width change rate of the straw board 110 is less than or equal to 0.4% to achieve adaptation to the ceramic rock board 120. In this embodiment, the water absorption width change rate of the straw board 110 in the transverse direction is 0.37%; the water absorption length change rate of the straw board 110 in the longitudinal direction is 0.33%.

[0076] Understandably, the water absorption rates of the straw board 110 and the ceramic rock board 120 also affect the waterproof performance of the manufactured composite board 100. In one embodiment, the ratio of the water absorption rate of the straw board 110 to the water absorption rate of the ceramic rock board 120 is within the range of 0.05 to 20. Setting the ratio of the water absorption rates of the straw board 110 and the ceramic rock board 120 within the range of 0.05 to 20 can also avoid delamination caused by different dimensional changes after the straw board 110 and the ceramic rock board 120 absorb water. In this embodiment, the water absorption rate of the straw board 110 is less than or equal to 0.5%; the water absorption rate of the ceramic rock board 120 is less than or equal to 0.05%. The water absorption rate of the manufactured composite board 100 is less than or equal to 0.1%.

[0077] In one embodiment, the thickness of the straw board 110 is within the range of 9 to 40 mm. The thickness of the ceramic rock board 120 is within the range of 1 to 6 mm. The purpose of setting the thickness of the straw board 110 within the range of 9 to 40 mm is that: since the density of the straw board 110 is significantly less than the density of the ceramic rock board 120, the straw board 110 about 9 to 40 mm can significantly reduce the overall weight of the composite board 100; at the same time, setting the thickness of the straw board 110 to 9 to 40 mm can also ensure that the manufactured composite board 100 has a high nail-holding force. That is to say, when the thickness of the straw board 110 is within the range of 9 to 40 mm, the composite board 100 has a high nail-holding force while the weight of the board is not too large, which is convenient for installation and transportation and more comfortable to use. Generally, the nail-holding force refers to the performance of wood in fixing metal connectors (round nails, wood screws, etc.), which is calculated by the force required to pull out a screw of a certain size. According to needs, the nail-holding force on the board surface of the composite board 100 is greater than or equal to 12 N / mm 2 . The nail-holding force on the board edge of the composite board 100 is greater than or equal to 8 N / mm 2 . In one embodiment, the nail-holding force on the board surface of the composite board 100 is 12.7 N / mm 2 . The nail-holding force on the board edge of the composite board 100 is greater than or equal to 8.9 N / mm 2 . Among them, the test method is formulated according to EN 13446 to 2002, and the test conditions are set as:

[0078] Screw size: ST4.2×38;

[0079] Pull-out speed: 5 mm / min;

[0080] Sample size: 50 mm×50 mm;

[0081] Test environment: 21.6℃, 64%RH.

[0082] It can be seen that the composite board 100 provided by the embodiments of the present invention has a relatively high nail-holding force value, meeting the requirements of the furniture industry.

[0083] The purpose of setting the thickness of the ceramic rock board 120 within the range of 1 to 6 mm is to enable the ceramic rock board 120 to adapt to the requirements of different usage scenarios. When the composite board 100 is used on some non-high-bearing-capacity board surfaces such as the side panels or door panels of furniture, a thinner ceramic rock board 120 can be selected. When the composite board 100 is used on some high-bearing-capacity board surfaces such as the table top panels or cabinet panel of furniture, a thicker ceramic rock board 120 is selected. In this embodiment, the thickness of the ceramic rock board 120 is preferably 3 mm. At this time, the properties such as the weight, wear resistance, and bearing capacity of the ceramic rock board 120 are relatively moderate, meeting the needs of most users. Moreover, the production cost of the corresponding ceramic rock board 02 is relatively low and the comprehensiveness is strong.

[0084] In addition, the applicant also conducted a fire resistance test on the manufactured composite board 100. In one of the embodiments, the fire resistance of the composite board 100 includes:

[0085] The combustion growth rate of the composite board 100 is less than or equal to 250 W / s;

[0086] and / or, the lateral flame spread range of the composite board 100 is less than or equal to the edge of the composite board 100;

[0087] and / or, when the composite board 100 is exposed to the burner flame, the total heat release in the first 600 seconds is less than or equal to 15 MJ.

[0088] Specifically, during the fire resistance test process, the standard document relied on is: EN 13501-1:2018 Classification of the fire performance of building materials and products. The specific test method is as follows:

[0089] 1. EN 13823:2020 Fire tests on building products - Single burning item test for building materials (except floorings);

[0090] 2. EN ISO 11925-2:2020 Fire tests - Ignition of building products by a specified flame.

[0091] During the test process of the composite board 100, the installation and fixing method of the composite board 100 is determined according to the standard document: EN 13823:2020. Among them, there is no ventilation gap behind the composite board sample to be tested, the composite board sample stands freely upright, and the upper and lower ends of the composite board 100 are fixed.

[0092] The test results obtained are shown in the following table:

[0093]

[0094] Wherein:

[0095] FIGRA is the heat release rate index for classification [W / s];

[0096] For Class A2 and Class B, FIGRA = FIGRA 0.2MJ ;

[0097] For Class C and Class D, FIGRA = FIGRA 0.4MJ ;

[0098] LFS is the lateral flame spread length [m];

[0099] THR 600s is the total heat release [MJ] at 600 s;

[0100] SMOGRA is the smoke generation rate [m 2 / s 2 ;

[0101] TSP 600s is the total smoke generation [m 2 at 600 s.

[0102] As required, the applicant also tested the manufactured composite board 100 for RoHS directive items. During the RoHS directive item test, Pb / Cd / Hg / Cr6+ / PBBs / PBDEs tests and Phthalates tests were carried out respectively. The test methods refer to IEC62321-4:2013+A1:2017, IEC62321-5:2013, IEC62321-7-2:2017, IEC62321-6:2015 and IEC62321-8:2017, and ICP-OES, UV-Vis and GC-MS were used for analysis.

[0103] The obtained test results are shown in the following table:

[0104]

[0105]

[0106] Wherein:

[0107] (1) 1 mg / kg = 0.0001%;

[0108] (2) MDL = method detection limit;

[0109] (3) ND = not detected (<MDL);

[0110] (4) "To" = not specified.

[0111] It can be seen that the fabricated composite board 100 can obviously meet the requirements of the RoHS directive item test.

[0112] In one of the embodiments, in order to make the composite board 100 meet the environmental protection requirements, the formaldehyde emission of the composite board is less than or equal to 0.06 mg / m 3 , so as to avoid damage to human health. Accordingly, the applicant tested the formaldehyde emission of the fabricated composite board. The test method referred to EN 717-1:2004 and used UV-Vis analysis. The test results showed that the formaldehyde emission of the composite board 100 provided in the embodiment of the present invention was 0.050 mg / m 3 . In the BS EN 13986:2004+A1:2015 standard, when the formaldehyde emission ≤ 0.124 mg / m 3 , the sample reaches E1 grade. It can be seen that the formaldehyde emission of the composite board provided in the embodiment of the present invention is 0.050 mg / m 3 , which is significantly less than 0.124 mg / m 3 . Therefore, the fabricated composite board reaches the E1 grade in the BS EN 13986:2004+A1:2015 standard.

[0113] In one of the embodiments, the composite board 100 further includes a first adhesive layer 140 and a second adhesive layer 150.

[0114] The first adhesive layer 140 is disposed between the straw board 110 and the ceramic rock board 120 for attaching the ceramic rock board 120 to the straw board 110. The second adhesive layer 150 is disposed between the straw board 110 and the lining board 130 for attaching the lining board 130 to the straw board 110. Specifically, the lining board 130 can be made of a metal plate or a ceramic rock board. When the lining board 130 is made of a ceramic rock board, the material of the lining board 130 can be the same as or different from that of the ceramic rock board 120. Additionally, when the lining board 130 is made of a ceramic rock board, the thickness of the lining board 130 is less than that of the ceramic rock board 120. In this embodiment, the lining board 130 is made of a metal plate. The straw board 110 has a solid structure. The ceramic rock board 120 is attached to the first surface 111 of the straw board 110 through the first adhesive layer 140; the lining board 130 is attached to the second surface 112 of the straw board 110 through the second adhesive layer 150. Both the first adhesive layer 140 and the second adhesive layer 150 are reactive hot melt adhesive materials. It can be understood that either the first adhesive layer 140 or the second adhesive layer 150 can be set as a reactive hot melt adhesive material. In one embodiment, the reactive hot melt adhesive material is a reactive polyurethane (PUR, Polyurethane Reactive) hot melt adhesive material. Since the PUR hot melt adhesive material does not contain organic solvents, it can be coated at a relatively low temperature. After coating and cooling and solidifying, the preliminary bonding can be completed. In the subsequent process, the PUR hot melt adhesive material will undergo moisture curing in the air and has excellent bonding strength and impact resistance after complete curing. Therefore, by bonding the straw board 110, the ceramic rock board 120, and the lining board 130 together through the reactive hot melt adhesive material, the formed composite board 100 has a high bonding strength.

[0115] In the specific bonding process, the curing process of the PUR hot melt adhesive is divided into two stages, namely cooling and coagulation and moisture curing:

[0116] In the cooling and coagulation stage, the PUR hot melt adhesive is heated and coated on the straw board. After cooling and coagulating, the PUR hot melt adhesive generates preliminary bonding strength;

[0117] In the moisture curing stage, the PUR hot melt adhesive undergoes a chain extension reaction with the moisture in the air to form a rigid structure of polyurethane molecular chains, thereby making it have high bonding strength, as well as good chemical resistance, heat resistance, and hydrolysis resistance.

[0118] Therefore, in this embodiment, the ceramic rock board 120 and the lining board 130 are respectively attached to the first surface 111 and the second surface 112 of the straw board 110 through reactive hot melt adhesive. The straw board 110, the ceramic rock board 120, the lining board 130, the first adhesive layer 140 and the second adhesive layer 150 form an integrated composite board structure after being cured by heating and pressing.

[0119] In this embodiment, the lining board 130 is made of an aluminum alloy plate. At this time, the thickness of the lining board 130 is in the range of 0.2 to 0.8 mm. When the volume of the composite board during installation is large and a large installation bearing capacity is required, the thickness of the lining board 130 is selected as the larger value of 0.8 mm, which can provide a large installation bearing capacity for the board and make the board installation more stable. Correspondingly, when the volume of the composite board during installation is small, the thickness of the lining board 130 can be selected as the smaller value of 0.2 mm.

[0120] In one embodiment, the reactive hot melt adhesive is a PUR reactive hot melt adhesive. When attaching the ceramic rock slab 120 and the lining board 130 to the straw board 110, first put the PUR reactive hot melt adhesive into a hot melt machine. After preheating, heating, and dispensing, apply the PUR reactive hot melt adhesive on the surface of the lining board 130 to form a second adhesive layer 150 with a thickness of 0.1 to 0.2 mm. Then, place the straw board 110 directly on top of the second adhesive layer 150, and then apply a first adhesive layer 140 with a thickness of 0.1 to 0.2 mm on the upper surface (the first surface 11) of the straw board 110. Then place the ceramic rock slab 120 directly on top of the second adhesive layer 150 to form a pre-finished composite board, and then put the pre-finished composite board into a hot pressing device for heating and pressing to cure it into a finished composite board. During the manufacturing process, when the PUR reactive hot melt adhesive is preheated, the temperature is maintained within the range of 80 to 110 °C; when the PUR reactive hot melt adhesive is heated, the temperature is maintained within the range of 120 to 130 °C. If the heating temperature is too high, it is easy to cause phenomena such as bursting and carbonization of the PUR reactive hot melt adhesive, thus affecting its bonding performance. When the manufactured composite board is in use, it is cut and sawn according to the size of the board required for furniture processing, and then the outer periphery of the furniture board is edge-sealed to provide comprehensive protection for the furniture board. Therefore, the composite board provided by the embodiments of the present invention has characteristics such as fire resistance, water resistance, and insect resistance. In addition, in order to improve the adhesion between the straw board 110 and the ceramic rock slab 120, wavy glue-laying grooves can be opened on the first surface of the straw board 110. At the same time, in order to save the amount of PUR reactive hot melt adhesive used, the wave height of the glue-laying groove is controlled within the range of 0.8 to 1.2 mm, and the wavelength is controlled within the range of 1.2 to 1.8 mm. The glue-laying groove is integrally formed with the straw board 110 when the straw board 110 is manufactured and formed. When applying the PUR reactive hot melt adhesive on the straw board 110 with this structure, part of the PUR reactive hot melt adhesive sinks into the glue-laying groove, and the fusion with the PUR reactive hot melt adhesive is better, so that the adhesion between the straw board 110 and the ceramic rock slab 120 is more firm. And by strictly controlling the wave height and wavelength of the glue-laying groove, the waste of the PUR reactive hot melt adhesive can be effectively avoided, thus controlling the production cost of the composite board provided by the embodiments of the present invention. At the same time, the composite board of the present invention has passed the formaldehyde content test, and no formaldehyde has been detected, belonging to an environmentally friendly board product with zero formaldehyde.

[0121] Actually, during the process of preparing the composite board 100, the applicant tried to jointly manufacture composite boards with ceramic rock slabs using wooden boards, PVC (Polyvinylchloride) boards, bamboo charcoal fiber boards, honeycomb aluminum boards, etc., and their comprehensive performances were not satisfactory.

[0122] For the composite board made of wood board and ceramic rock board, on the one hand, there is a large difference in the water absorption expansion coefficient between the wood board and the ceramic rock board, and the two are prone to delamination after long-term use, resulting in damage to the composite board; on the other hand, the fire resistance of the wood board is also poor.

[0123] For the composite board made of PVC board and ceramic rock board, similarly, because there is a large difference in the water absorption expansion coefficient between the PVC board and the ceramic rock board, the two are prone to delamination after long-term use, resulting in damage to the composite board. In addition, chemical reactions may occur inside the PVC board under sunlight irradiation, leading to deterioration of the material properties.

[0124] For the composite board made of bamboo charcoal fiber board and ceramic rock board, similarly, because there is a large difference in the water absorption expansion coefficient between the bamboo charcoal fiber board and the ceramic rock board, the two are prone to delamination after long-term use, resulting in damage to the composite board. On the other hand, the fire resistance of the bamboo charcoal fiber board is also not good. Moreover, the bamboo charcoal fiber board contains lead elements, which are likely to damage people's physical health.

[0125] For the composite board made of honeycomb aluminum plate and ceramic rock board, on the one hand, the nail holding force of the honeycomb aluminum plate is small. When setting screws on the composite board made of honeycomb aluminum plate and ceramic rock board, the screws are prone to fall off from the composite board. In addition, the manufacturing process of the honeycomb aluminum plate is relatively complex, and its overall cost is also high.

[0126] It can be seen that the overall mechanical properties, waterproof properties, fire resistance properties and environmental protection properties of the composite board made of straw board and ceramic rock board are superior to those of the composite board made of the combination of the above wood board, PVC board, bamboo charcoal fiber board or honeycomb aluminum plate and ceramic rock board.

[0127] Example two:

[0128] Please refer to Figure 2 and Figure 3 , in one of the embodiments, the glue spreading groove includes a plurality of linear grooves 113. The plurality of linear grooves 113 are arranged in parallel. During the process of attaching the ceramic rock board 120 to the straw board 110, the plurality of linear grooves 113 can reduce the relative displacement between the ceramic rock board 120 and the straw board 110. According to needs, linear protrusions 210 corresponding to the linear grooves 113 of the straw board 110 can also be provided on the surface of the ceramic rock board 120 that fits the straw board 110. During the fitting process, the linear protrusions 210 of the ceramic rock board 120 can be correspondingly accommodated in the linear grooves 113 of the straw board 110, thereby further reducing the relative displacement between the ceramic rock board 120 and the straw board 110 during the fitting process. At this time, the manufactured composite board is as Figure 4 shown.

[0129] Example 3:

[0130] Please refer to Figure 5 , in one embodiment, the glue - spreading groove includes a plurality of annular grooves 121. The sizes of the plurality of annular grooves 121 gradually increase from the inside to the outside. Similarly, the purpose of setting the glue - spreading groove to include a plurality of annular grooves 121 is to reduce the relative displacement of the ceramic rock board 120 relative to the straw board 110 in all directions during the lamination process. According to needs, the surface of the ceramic rock board 120 that is laminated with the straw board 110 can also be provided with annular ridges corresponding to the annular grooves 121 of the straw board 110. During the lamination process, the annular ridges of the ceramic rock board 120 can be correspondingly received in the annular grooves 121 of the straw board 110, thereby further reducing the relative displacement of the ceramic rock board 120 and the straw board 110 during the lamination process.

[0131] Example 4:

[0132] Please refer to Figure 6 , in one embodiment, the glue - spreading groove includes a plurality of dimples 131 provided on the first surface 111 of the straw board 110. The reactive hot - melt adhesive partially sinks into the plurality of dimples 131. Similarly, the purpose of setting the glue - spreading groove to include a plurality of dimples 131 is to reduce the relative displacement of the ceramic rock board 120 relative to the straw board 110 in all directions during the lamination process. According to needs, the surface of the ceramic rock board 120 that is laminated with the straw board 110 can also be provided with bumps corresponding to the dimples 131 of the straw board 110. During the lamination process, the bumps of the ceramic rock board 120 can be correspondingly received in the dimples 131 of the straw board 110, thereby further reducing the relative displacement of the ceramic rock board 120 and the straw board 110 during the lamination process.

[0133] It can be understood that edge - sealing strips (not shown in the figure) are also provided on the sides of the straw board 110 and the ceramic rock board 120. The edge - sealing strips cover the sides of the straw board 110 and the ceramic rock board 120, thereby preventing water vapor or other pollutants from entering the interior of the composite board 100.

[0134] Example 5:

[0135] Another embodiment of the present invention further provides a piece of furniture, including a composite board 100. The composite board 100 is the composite board 100 described in any of the above embodiments. Since the composite board 100 includes a straw board 110 and a ceramic rock board 120 attached to the surface of the straw board 110. The ceramic rock board 120 can improve the aesthetics and resistance strength of the board surface, make the surface style of the board more diverse, meet the appearance needs of different people, and highlight the luxury and high-grade of the furniture. At the same time, due to the relatively high hardness and good wear resistance of the ceramic rock board 120 itself, it can effectively prevent scratches or cracks on the board surface, and the stability of the board is relatively high. In addition, since the inside of the composite board 100 uses the straw board 110 as the base material, the straw board 110 can effectively improve the nail-holding force of the composite board 100. In addition, since the ratio of the water absorption thickness swelling rate of the straw board 110 and the ceramic rock board 120 is within the range of 0.05 to 20, it can avoid the phenomenon that the composite board 100 is damaged due to the delamination of the straw board 110 and the ceramic rock board 120 during long-term use.

[0136] Embodiment Six:

[0137] Understandably, the base material 110 is not limited to being made of a straw board. Please refer to Figure 7 , one embodiment of the present invention provides a composite board 200, including a foam aluminum board 210 and a ceramic rock board 220.

[0138] The foam aluminum board 210 is made of foam aluminum material. Foam aluminum is made by adding additives to pure aluminum or aluminum alloy and then through a foaming process. Foam aluminum has both the characteristics of metal and pores, and it has the advantages of low density, strong high-impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, high forming accuracy, and can be surface-coated, etc.

[0139] The ceramic rock board 220 is attached to the first surface of the foam aluminum board 210.

[0140] In the composite board 200 provided in this embodiment, the ceramic rock board 220 is attached to the surface of the foam aluminum board 210. The ceramic rock board 220 can improve the aesthetics and resistance strength of the board surface, make the surface style of the board more diverse, meet the appearance needs of different people, and highlight the luxury and high-grade of the furniture. On the other hand, due to the relatively high hardness and good wear resistance of the ceramic rock board 220 itself, attaching the ceramic rock board 220 to the surface of the foam aluminum board 210 can effectively prevent scratches or cracks on the board surface, thereby making the stability of the composite board relatively high.

[0141] In addition, since the foam aluminum plate 210 is used as the base material inside the composite board 200, and there are many pores with different sizes and irregular shapes inside the foam aluminum plate 210, it can effectively improve the nail-holding force of the foam aluminum plate 210, so that the prepared composite board 200 is easy to be spliced and assembled with screws. On the other hand, due to the small difference in mechanical properties between the foam aluminum plate 210 and the ceramic rock plate 220, it can avoid the phenomenon that the composite board 200 is damaged due to the delamination of the foam aluminum plate 210 and the ceramic rock plate 220 during long-term use. In particular, during the cutting process of the composite board 200, even if the ceramic rock plate 220 needs to be sprayed with water during cutting, since the foam aluminum plate 210 is not easily deformed after absorbing water, the phenomenon of delamination of the foam aluminum plate 210 and the ceramic rock plate 220 during the cutting of the composite board 200 is avoided. That is to say, in this embodiment, since the foam aluminum plate 210 itself is made of metal material, its size is not easily changed after absorbing water, so that the phenomenon that the composite board is damaged due to the delamination of the foam aluminum plate 210 and the ceramic rock plate 220 during long-term use can be avoided.

[0142] In fact, in the field of furniture boards, another important evaluation factor for furniture boards is the mechanical processing performance of the boards. That is, a large board needs to be cut into small boards of various shapes or lengths, and then the cut boards are assembled together by bonding, screwing, etc. However, since the hardness and density of the ceramic rock plate are relatively high, water is usually needed for cooling when cutting the ceramic rock plate. If the base material of the composite board is made of wood, since the size change of the wood after absorbing water is relatively large, while the size change of the ceramic rock plate after absorbing water is relatively small, it is very easy for the composite board (wooden base + ceramic panel) to delaminate between the wooden base and the ceramic panel during the cutting process, resulting in damage to the composite board. In the composite board provided in the embodiment of the present invention, the base material of the composite board is the foam aluminum plate 210. Since the properties of the foam aluminum plate 210 are relatively stable, its size is not easily changed after absorbing water. Therefore, for the composite board composed of the foam aluminum plate 210 and the ceramic rock plate 220, even if water is used for cooling during the cutting process of the composite board, the size of the foam aluminum plate 210 therein will not change too much, so that the foam aluminum plate 210 and the ceramic rock plate 220 will not be damaged due to the inconsistent water absorption expansion rate. That is to say, the composite board made of the foam aluminum plate 210 and the ceramic rock plate 220 has good mechanical cutting resistance characteristics. Especially in the case where the ceramic rock plate 220 needs to be water-cooled cut, the mechanical cutting resistance characteristics of the composite board composed of the foam aluminum plate 210 and the ceramic rock plate 220 are even more excellent.

[0143] In one embodiment, the density of the foam aluminum plate 210 is set to be 0.2 to 0.4 g / cm 3Within a range. The density of the foamed aluminum plate 210 is set within the range of 0.2 to 0.4 g / cm 3 Within this range, it can ensure that while having a relatively high nail-holding force, the overall weight of the composite board will not be too large. For example, when using the composite board composed of the foamed aluminum plate 210 in a door panel, the manufactured door panel is lighter in weight and is easy to open and close. Additionally, due to the good sound insulation and noise reduction effect of the foamed aluminum plate 210, the sound insulation effect of the manufactured door panel is also relatively good.

[0144] In one embodiment, the composite board 200 further includes a lining board 230. The lining board 230 is attached to the second surface 212 of the foamed aluminum plate 210 opposite to the first surface 211. In this embodiment, the lining board 230 includes a second ceramic rock board. By providing a ceramic rock board 220 on the first surface 211 of the foamed aluminum plate 210 and a lining board 230 made of a second ceramic rock board on the second surface 212 of the foamed aluminum plate 210, the wear resistance of both sides of the composite board 200 will be better, making the composite board 200 more suitable for applications in the field of door panels. In this embodiment, the thickness of the lining board 230 is less than or equal to the thickness of the ceramic rock board 220. By attaching the lining board 230 to the second surface of the foamed aluminum plate 210 opposite to the first surface, on the one hand, the lining board 230 can effectively protect the foamed aluminum plate 210 from being corroded; on the other hand, since both surfaces of the foamed aluminum plate 210 are covered by the ceramic rock board 220 and the lining board 230 respectively, the waterproof performance of the composite board 200 can be further improved. At this time, during the use of the composite board 200, it is not easy to cause delamination and breakage of the composite board due to the different water absorption expansion rates of the ceramic rock board 220 and the foamed aluminum plate 210.

[0145] In this embodiment, the water absorption thickness expansion rate of the foamed aluminum plate 210 is less than or equal to 0.1%. Since the water absorption thickness expansion rate of the foamed aluminum plate 210 is less than or equal to 0.1%, it can be fully adapted to the water absorption thickness expansion rate of the ceramic rock board 220. According to requirements, the water absorption thickness expansion rate of the composite board 200 is less than or equal to 0.05%. In addition to the consideration factor of the water absorption thickness expansion rate, the water absorption dimensional change rate in the length direction or the width direction is also an important consideration factor for furniture boards. According to requirements, the water absorption length change rate or the water absorption width change rate of the foamed aluminum plate 210 is also less than or equal to 0.1%, so as to achieve the adaptation process with the ceramic rock board 220.

[0146] Understandably, the porosity and pore size of the foamed aluminum plate 210 also affect the mechanical properties of the manufactured composite plate 200. In one embodiment, the foamed aluminum plate 210 has a closed-cell structure. The porosity of the foamed aluminum plate 210 is in the range of 80% to 90%. The pore size of the foamed aluminum plate 210 is in the range of 0.4 to 5 mm. By setting the foamed aluminum plate 210 to have a closed-cell structure, the nail-holding force of the foamed aluminum plate 210 can be further improved, and the machinability of the foamed aluminum plate 210 can be enhanced. In addition, by selecting the foamed aluminum plate 210 with a pore size in the range of 0.4 to 5 mm, since the pore size of the air holes therein is small, the nail-holding force of the foamed aluminum plate 210 can also be improved.

[0147] In one embodiment, the ratio of the coefficient of thermal expansion of the foamed aluminum plate 210 to the coefficient of thermal expansion of the ceramic rock plate 220 is in the range of 0.2 to 5. Similarly, by setting the ratio of the coefficient of thermal expansion of the foamed aluminum plate 210 to the coefficient of thermal expansion of the ceramic rock plate 220 to be in the range of 0.2 to 5, when the temperature difference in the use environment of the composite plate is large, the foamed aluminum plate 210 and the ceramic rock plate 220 will not be damaged due to inconsistent dimensional changes of the two and resulting delamination.

[0148] The thickness of the foamed aluminum plate 210 is greater than or equal to 12 mm. In one embodiment, the thickness of the foamed aluminum plate 210 is in the range of 12 to 40 mm. The thickness of the ceramic rock plate 220 is greater than or equal to 1 mm. In one embodiment, the thickness of the ceramic rock plate 220 is in the range of 1 to 6 mm. The purpose of setting the thickness of the foamed aluminum plate 210 in the range of 12 to 40 mm is as follows: Since the density of the foamed aluminum plate 210 is significantly less than the density of the ceramic rock plate 220, the foamed aluminum plate 210 of about 12 to 40 mm can significantly reduce the overall weight of the composite plate 200; at the same time, setting the thickness of the foamed aluminum plate 210 to be 12 to 40 mm can also ensure that the manufactured composite plate 200 has a high nail-holding force. That is to say, when the thickness of the foamed aluminum plate 210 is in the range of 12 to 40 mm, the composite plate 200 has a high nail-holding force while the weight of the plate is not too large, making it convenient for installation and transportation and more comfortable to use. Generally, the nail-holding force refers to the performance of wood in fixing metal connectors (round nails, wood screws, etc.), which is calculated by the force required to pull out a screw of a certain size. In this embodiment, the nail-holding force of the surface of the composite plate composed of the foamed aluminum plate 210 and the ceramic rock plate 220 is greater than or equal to 10 N / mm 2 . It can be seen that the composite plate 200 provided by the embodiment of the present invention has a high value of nail-holding force, meeting the requirements of the furniture industry.

[0149] The purpose of setting the thickness of the ceramic rock slab 220 within the range of 1 to 6 mm is to enable the ceramic rock slab 220 to meet the requirements of different usage scenarios. When the composite board 200 is used on some non-high-bearing-capacity board surfaces such as the side panels or door panels of furniture, a relatively thin ceramic rock slab 220 can be selected. And when the composite board 200 is used on some high-bearing-capacity board surfaces such as the table top panels or cabinet panels of furniture, a relatively thick ceramic rock slab 220 is selected. In this embodiment, the thickness of the ceramic rock slab 220 is preferably 3 mm. At this time, the properties such as the weight, wear resistance, and bearing capacity of the ceramic rock slab 220 are relatively moderate, meeting the needs of most users. Moreover, the corresponding production cost of the ceramic rock slab 220 is relatively low and the comprehensiveness is strong.

[0150] In one of the embodiments, the composite board 200 further includes a first adhesive layer 240 and a second adhesive layer 250.

[0151] The first adhesive layer 240 is disposed between the foam aluminum plate 210 and the ceramic rock slab 220 for attaching the ceramic rock slab 220 to the foam aluminum plate 210. The second adhesive layer 250 is disposed between the foam aluminum plate 210 and the lining plate 230 for attaching the lining plate 230 to the foam aluminum plate 210. In this embodiment, the lining plate 230 can be made of a metal plate or a second ceramic rock slab. When the lining plate 230 is made of a second ceramic rock slab, the production material of the lining plate 230 can be the same as or different from the production material of the ceramic rock slab 220. Additionally, when the lining plate 230 is made of a second ceramic rock slab, the thickness of the lining plate 230 is less than the thickness of the ceramic rock slab 220. In this embodiment, the ceramic rock slab 220 is attached to the first surface of the foam aluminum plate 210 through the first adhesive layer 240; the lining plate 230 is attached to the second surface of the foam aluminum plate 210 through the second adhesive layer 250. Both the first adhesive layer 240 and the second adhesive layer 250 are reactive hot melt adhesive materials. It can be understood that one of the first adhesive layer 240 and the second adhesive layer 250 can also be set as a reactive hot melt adhesive material. In one of the embodiments, the reactive hot melt adhesive material is a reactive polyurethane (PUR, Polyurethane Reactive) hot melt adhesive material. Since the PUR hot melt adhesive material does not contain organic solvents, the colloid can be coated at a relatively low temperature. After the colloid is coated and cooled and solidified, the preliminary bonding can be completed. In the subsequent process, the PUR hot melt adhesive material will undergo moisture curing in the air and has excellent bonding strength and impact resistance after being completely cured. Therefore, by bonding the foam aluminum plate 210 with the ceramic rock slab 220 and the lining plate 230 through the reactive hot melt adhesive material, the formed composite board has a relatively high bonding strength.

[0152] Therefore, in this embodiment, the ceramic rock slab 2 and the lining plate 230 are respectively attached to the first surface 211 and the second surface 212 of the foam aluminum plate 210 by a reactive hot melt adhesive. The foam aluminum plate 210, the ceramic rock slab 220, the lining plate 230, the first adhesive layer 240 and the second adhesive layer 250 form an integrated composite plate structure after being heated, pressurized and cured.

[0153] In one embodiment, the reactive hot melt adhesive is a PUR reactive hot melt adhesive. When attaching the ceramic rock slab 220 and the lining plate 230 to the foam aluminum plate 210, first put the PUR reactive hot melt adhesive into a hot melt machine. After preheating, heating and dispensing, apply the PUR reactive hot melt adhesive on the surface of the lining plate 230 to form a second adhesive layer 250 with a thickness of 0.1 to 0.2 mm. Then, place the foam aluminum plate 210 directly on top of the second adhesive layer 250, and then apply a first adhesive layer 240 with a thickness of 0.1 to 0.2 mm on the upper surface (first surface) of the foam aluminum plate 210. Then place the ceramic rock slab 220 directly on top of the second adhesive layer 250 to form a pre-finished composite board, and then put the pre-finished composite board into a hot pressing device for heating, pressurizing and curing to form a finished composite board. During the manufacturing process, when the PUR reactive hot melt adhesive is preheated, the temperature is maintained in the range of 80 to 110 °C; when the PUR reactive hot melt adhesive is heated, the temperature is maintained in the range of 120 to 130 °C. If the heating temperature is too high, it is easy to cause phenomena such as bursting and carbonization of the PUR reactive hot melt adhesive, thus affecting its bonding performance. When the manufactured composite board is applied, it is cut and opened according to the size of the board required for furniture processing, and then the outer periphery of the furniture board is edge-sealed to provide comprehensive protection for the furniture board. Therefore, the composite board provided by the embodiments of the present invention has characteristics such as fire resistance, water resistance and insect resistance. In addition, in order to improve the adhesion between the foam aluminum plate 210 and the ceramic rock slab 220, wavy glue-laying grooves can be opened on the first surface of the foam aluminum plate 210. At the same time, in order to save the amount of PUR reactive hot melt adhesive, the wave height of the glue-laying groove is controlled in the range of 0.8 to 1.2 mm, and the wavelength is controlled in the range of 1.2 to 1.8 mm. The glue-laying groove is integrally formed with the foam aluminum plate 210 when the foam aluminum plate 210 is manufactured. When applying the PUR reactive hot melt adhesive on the foam aluminum plate 210 with this structure, part of the PUR reactive hot melt adhesive sinks into the glue-laying groove, and the fusion with the PUR reactive hot melt adhesive is better, so that the adhesion between the foam aluminum plate 210 and the ceramic rock slab 220 is more firm. And by strictly controlling the wave height and wavelength of the glue-laying groove, the waste of PUR reactive hot melt adhesive can be effectively avoided, thereby controlling the production cost of the composite board provided by the embodiments of the present invention. At the same time, the composite board of the present invention passes the formaldehyde content test, and no formaldehyde is detected, belonging to an environmentally friendly board product with zero formaldehyde.

[0154] In addition, in this embodiment, the foam aluminum plate 210 is used as the base material of the composite plate. The surface of the foam aluminum plate 210 that is adhered to the ceramic rock plate 220 has a porous structure 213, as Figure 8 shown. When the first adhesive layer 240 is used to bond the foam aluminum plate 210 and the ceramic rock plate 220, the first adhesive layer 240 is partially disposed in the porous structure 213. That is to say, when the first adhesive layer 240 is used to bond the foam aluminum plate 210 and the ceramic rock plate 220, the porous structure 213 on the surface of the foam aluminum plate 210 can increase the contact area between the first adhesive layer 240 and the foam aluminum plate 210, thereby making the bonding performance between the foam aluminum plate 210 and the ceramic rock plate 220 better.

[0155] Embodiment Seven:

[0156] Understandably, a glue-laying groove 214 can also be provided on the surface of the foam aluminum plate 210, as Figure 9 shown. The glue-laying groove 214 can improve the adhesion between the foam aluminum plate 210 and the ceramic rock plate 220. Understandably, since the surface of the foam aluminum plate 210 has a porous structure 213, at this time, the porous structure 213 is also located inside the groove body of the glue-laying groove 214, thereby further improving the adhesion between the foam aluminum plate 210 and the ceramic rock plate 220.

[0157] Understandably, a sealing strip (not shown in the figure) is also provided on the sides of the foam aluminum plate 210 and the ceramic rock plate 220. The sealing strip covers the sides of the foam aluminum plate 210 and the ceramic rock plate 220, thereby preventing moisture or other pollutants from entering the interior of the composite plate 200.

[0158] Embodiment Eight:

[0159] Another embodiment of the present invention also discloses a door panel made of the composite plate provided in any one of the above embodiments. Please refer to Figure 10 and Figure 11, the door panel 300 provided by the embodiment of the present invention includes a composite board 200, and the composite board 200 is the composite board 200 provided by any one of the above embodiments. In this embodiment, a sealing strip 260 is further provided on the outer periphery of the door panel 300. When manufacturing the door panel 300, generally, the composite board is cut into a door panel 300 with a specified size according to the specification size of the door panel 300. After cutting out the door panel 300, in order to protect the outer edge of the door panel 300 and avoid cracking and deformation of the door edge, edge sealing treatment will be performed on the outer periphery of the door panel 300. Specifically, in the door panel structure provided by the embodiment of the present invention, the door panel 300 is protected by attaching a sealing strip 260 to its outer periphery. Preferably, in order to further enhance the structural strength and appearance texture of the door panel structure, the sealing strip 260 includes an outer surface layer 270 for serving as the outer surface of the sealing strip 260. The manufacturing material of the outer surface layer 270 is an aluminum sheet, an aluminum alloy sheet or an ABS plastic sheet. Among them, ABS plastic is a terpolymer of three monomers: acrylonitrile (A), butadiene (B), and styrene (S). The relative contents of the three monomers can be changed arbitrarily to form various resins. ABS plastic has the common properties of all three components. Acrylonitrile (A) makes it resistant to chemical corrosion, heat-resistant, and has a certain surface hardness; butadiene (B) gives it high elasticity and toughness; styrene (S) gives it the processing and molding characteristics of thermoplastic plastics and improves electrical properties. Since the ABS plastic sheet has excellent properties, it can be used as the outer surface layer 270 of the sealing strip 260. Preferably, since the material cost of the aluminum sheet or aluminum alloy sheet is relatively high, in order to strictly control the cost of the sealing strip 260, the sealing strip 260 can be manufactured in the form of a composite layer of an aluminum sheet and a PVC adhesive layer 280 or a composite layer of an aluminum alloy sheet and a PVC adhesive layer 280. Among them, the thickness of the aluminum sheet or aluminum alloy sheet is 0.03 mm. A PVC adhesive layer 280 is provided on the side of the outer surface layer 270 that fits the outer periphery of the door panel 300. The thickness of the sealing strip 260 is 1 mm. The form of the composite layer of the aluminum sheet and the PVC adhesive layer 280, or the form of the composite layer of the aluminum alloy sheet and the PVC adhesive layer 280 can make the sealing strip 260 have the appearance texture of the aluminum sheet or aluminum alloy sheet on the outer side surface. At the same time, the inner composite PVC adhesive layer 280 can fully expand the aluminum sheet or aluminum alloy sheet to facilitate attachment, so that the sealing strip 260 has corresponding structural strength. Therefore, by forming a 1 mm thick sealing strip 260 through the composite of a 0.03 mm thick aluminum sheet or aluminum alloy sheet and a PVC adhesive layer 280, compared with the sealing strip 260 formed directly by using a 1 mm thick aluminum sheet or aluminum alloy sheet, its material cost is greatly reduced, and it has better toughness and better edge sealing effect. In this embodiment, the sealing strip 260 is attached to the outer periphery of the door panel 300 through a third glue layer 290. In addition, the sealing strip 260 can also be formed by laminating and compounding an ABS plastic sheet and a PVC adhesive layer 280.

[0160] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A composite board, characterized in that, The nail-holding force of the surface of the composite board is greater than or equal to 10 N / mm 2 , including: A base material, the base material having a first surface and a second surface, the base material being a foam aluminum plate, the density of the foam aluminum plate being in the range of 0.2 to 0.4 g / cm3, the thickness of the foam aluminum plate being in the range of 12 to 40 mm, the porosity of the foam aluminum plate being within the range of 80% to 90%, the pore diameter of the foam aluminum plate being within the range of 0.4 to 5 mm, and the water absorption thickness swelling rate of the foam aluminum plate being less than or equal to 0.1%; and A first ceramic rock slab, attached to the first surface of the base material; wherein, the ratio of the water absorption thickness swelling rate of the base material to the water absorption thickness swelling rate of the first ceramic rock slab is in the range of 0.05 to 20; The composite board further includes a lining board, The lining board includes a second ceramic rock slab; The thickness of the lining board is less than or equal to the thickness of the first ceramic rock slab.

2. The composite board according to claim 1, characterized in that, The lining board is attached to the second surface of the base material; The thickness ratio of the first ceramic rock slab to the lining board is n:1, wherein the value of n is in the range of 2 to 10.

3. The composite board according to claim 1, characterized in that, It includes a first adhesive layer, provided between the base material and the first ceramic rock slab.

4. The composite board according to claim 3, characterized in that, The first surface of the foam aluminum plate has a porous structure, and the first adhesive layer is partially disposed in the porous structure.

5. A door panel, comprising a composite board, characterized in that, The composite board is the composite board according to any one of claims 1 to 4.

6. The door panel according to claim 5, wherein, It further includes: An edge banding strip, attached to the outer periphery of the door panel.

7. The door panel according to claim 6, characterized in that, The edge banding strip includes an outer surface layer, and the outer surface layer is an aluminum sheet, an aluminum alloy sheet or an ABS plastic sheet.

8. The door panel according to claim 7, characterized in that, The edge banding strip further includes a PVC adhesive layer, and the PVC adhesive layer is disposed on the side where the outer surface layer is in contact with the outer periphery of the door panel.

9. A piece of furniture, comprising a composite board, characterized in that, The composite board is the composite board according to any one of claims 1 to 4.

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