Corrosion-resistant sandwich panel

Abstract

The utility model discloses a corrosion-resistant sandwich panel which comprises a color steel panel, a sandwich panel body and a color steel bottom plate which are sequentially and tightly stacked from top to bottom. Composite coatings are arranged on the outer surface of the color steel face plate and the outer surface of the color steel bottom plate, and each composite coating comprises a first polyvinylidene fluoride coating and a second polyvinylidene fluoride coating which are tightly attached in sequence. The inner surface of the color steel face plate and the inner surface of the color steel bottom plate are each provided with a high-weather-resistance polyester coating. And the multi-layer combined composite coating can better improve the corrosion resistance effect of the sandwich panel and prolong the service life of the sandwich panel. On the other hand, the polyvinylidene fluoride coating can be coated at normal temperature, the process is simpler and easier to implement, and the advantages of being high in normal-temperature curing speed, high in production efficiency and the like are achieved. And the composite coating is made of the same material, so that the problems caused by coating of different materials can be greatly avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sandwich panels, in particular to a corrosion-resistant sandwich panel. Background Art

[0002] Color steel sandwich panels are a common product in current building materials. They are not only flame retardant and soundproof, but also environmentally friendly and efficient. Color steel sandwich panels are made of two layers of metal panels and a middle layer of polymer insulation core. They are easy to install, light in weight, environmentally friendly and efficient. In addition, the closed cell molecular structure used in the filling system can prevent condensation of water vapor.

[0003] The Chinese utility model with announcement number CN208473104U discloses a corrosion-resistant light-weight color steel sandwich panel, including a first corrosion-resistant color steel panel, a first glass fiber panel, a second glass fiber panel, a third glass fiber panel and a second corrosion-resistant color steel panel, the second glass fiber panel is sandwiched between two layers of rock wool silicon aluminum aerogel panels; the first glass fiber panel and the third glass fiber panel are arranged outside the two layers of rock wool silicon aluminum aerogel panels, and the two layers of corrosion-resistant color steel panels are arranged outside the first glass fiber panel and the third glass fiber panel; the corrosion-resistant color steel panel includes, from outside to inside, a second corrosion-resistant surface layer, a first corrosion-resistant surface layer, a second corrosion-resistant base layer, a first corrosion-resistant base layer, a color steel panel, a third corrosion-resistant base layer, a third corrosion-resistant surface layer and a fourth corrosion-resistant surface layer. The color steel panel used in the utility model is provided with a multi-layer corrosion-resistant paint coating, and the paint coating can be as thin as 80-120 microns, which improves the corrosion resistance effect, reduces the formation of micropores, provides corrosion resistance, and is lighter in material.

[0004] The applicant has found that the existing corrosion-resistant lightweight color steel sandwich panels have a certain corrosion resistance effect, although the surface is protected by multi-layer paint coating. However, this sandwich panel product formed by multi-layer paint coating has high requirements for process and production equipment, which restricts the production of color steel sandwich panels; on the other hand, during the production process, the stress between different coatings may cause peeling or cracking between the coatings, which may cause the coating system to lose integrity and reduce its performance and corrosion resistance. Utility Model Content

[0005] In order to overcome the above technical defects, the utility model provides a corrosion-resistant sandwich panel.

[0006] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0007] The corrosion-resistant sandwich panel of the utility model comprises a color steel panel, a sandwich panel and a color steel bottom plate which are tightly stacked from top to bottom;

[0008] The outer surfaces of the color steel panel and the color steel bottom plate are both provided with a composite coating, and the composite coating comprises a first polyvinylidene fluoride coating and a second polyvinylidene fluoride coating which are closely attached in sequence;

[0009] The inner surfaces of the color steel panel and the color steel bottom plate are both provided with a highly weather-resistant polyester coating.

[0010] Preferably, the thickness of the first polyvinylidene fluoride coating and the second polyvinylidene fluoride coating is 20 to 30 μm;

[0011] The thickness of the highly weather-resistant polyester coating is 5 to 12 μm.

[0012] Preferably, the first polyvinylidene fluoride coating is used to coat the outer surfaces of the color steel panel and the color steel bottom plate;

[0013] The outer surface of the second polyvinylidene fluoride coating is provided with a super hydrophobic coating.

[0014] Preferably, the sandwich panel comprises a first rubber cushion layer, a polyester foam layer and a second rubber cushion layer which are closely fitted in sequence;

[0015] The first rubber cushion layer is closely fitted to the inner surface of the color steel panel, and the second rubber cushion layer is closely fitted to the inner surface of the color steel bottom plate.

[0016] Preferably, the first rubber cushion layer and the second rubber cushion layer are both made of hydrogenated nitrile rubber.

[0017] Preferably, the sandwich panel is provided with a rectangular frame, and the rectangular frame surrounds four side walls of the sandwich panel;

[0018] The rectangular frame includes four hollow profiles and four right-angle connectors, one right-angle connector connects two adjacent hollow profiles, and the four hollow profiles are spliced ​​through the four right-angle connectors.

[0019] Preferably, the four sides of the color steel panel are respectively provided with first edges extending downward, so that the color steel panel has a box-shaped structure;

[0020] The color steel panel covers the upper surface of the sandwich panel, and the first edge is attached to a partial side wall of the sandwich panel.

[0021] Preferably, the four sides of the color steel bottom plate are respectively provided with second edges extending upward, so that the color steel bottom plate has a box-shaped structure;

[0022] The color steel bottom plate covers the lower surface of the sandwich plate, and the second edge is attached to a partial side wall of the sandwich plate.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model provides a corrosion-resistant sandwich panel, comprising a color steel panel, a sandwich panel and a color steel bottom plate which are tightly stacked from top to bottom; the outer surfaces of the color steel panel and the color steel bottom plate are both provided with a composite coating, and the composite coating comprises a first polyvinylidene fluoride coating and a second polyvinylidene fluoride coating which are tightly fitted in sequence; the inner surfaces of the color steel panel and the color steel bottom plate are both provided with a high weather-resistant polyester coating.

[0025] In the utility model, a multi-layer polyvinylidene fluoride coating is arranged on the outer surface of the color steel panel and the color steel bottom plate. The polyvinylidene fluoride coating has excellent chemical stability, can withstand corrosion from a variety of chemical substances such as strong acids, strong alkalis, organic solvents, and has excellent weather resistance, can resist the erosion of ultraviolet rays, moisture, oxidation and pollutants for a long time, and also has excellent properties such as wear resistance. The multi-layer combined composite coating can better improve the corrosion resistance and service life of the sandwich panel. On the other hand, the polyvinylidene fluoride coating can be applied at room temperature, which is simpler and easier to implement in terms of process, and has the advantages of fast curing speed at room temperature and high production efficiency. And the composite coatings are all made of the same material, which can greatly avoid the problems between coatings with different materials.

[0026] Setting a highly weather-resistant polyester coating on the inner surface of the color steel panel and the color steel bottom plate has better cost advantages, and the synergistic composite coating improves the overall corrosion resistance of the sandwich panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the corrosion-resistant sandwich panel of the utility model;

[0029] Figure 2 It is a schematic diagram of the assembly of the corrosion-resistant sandwich panel of the utility model;

[0030] Figure 3 It is an abbreviated schematic diagram of a cross section of the corrosion-resistant sandwich panel of the utility model;

[0031] Figure 4 It is a schematic diagram of the assembly of the hollow profile and the right-angle connector of the utility model;

[0032] In the figure:

[0033] 10-color steel panel, 11-first edge;

[0034] 20-sandwich plate, 21-first rubber cushion layer, 22-phenolic foam layer, 23-rubber cushion layer;

[0035] 30-color steel bottom plate, 31-second edge;

[0036] 40 - rectangular frame, 41 - hollow profile, 411 - first groove, 412 - plug-in groove, 42 - right-angle connector, 421 - second groove, 422 - plug-in portion. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] like Figure 1 to Figure 4 As shown, a preferred structure of a corrosion-resistant sandwich panel described in the utility model.

[0039] like Figure 2 As shown, the corrosion-resistant sandwich panel comprises a color steel panel 10, a sandwich panel 20 and a color steel bottom plate 30 which are tightly stacked from top to bottom. The color steel panel, the sandwich panel and the color steel bottom plate can be fixedly connected by an adhesive to form an integrated structure.

[0040] Among the main innovations of this patented technology, this technology sets a color steel panel and a color steel bottom plate. The color steel plate is a steel plate with a composite coating, which has the advantages of good corrosion resistance, bright colors, beautiful appearance, convenient processing and molding, and the original strength of the steel plate, and the cost is low. The color steel plate is combined with the corrosion-resistant composite coating of the technology including a multi-layer polyvinylidene fluoride coating + a high weather-resistant polyester coating. Among them, a multi-layer polyvinylidene fluoride coating is arranged on the outer surface of the color steel panel and the color steel bottom plate. The polyvinylidene fluoride coating has excellent chemical stability, can withstand corrosion from a variety of chemical substances such as strong acids, strong alkalis, and organic solvents, and has excellent weather resistance. It can resist the erosion of ultraviolet rays, moisture, oxidation and pollutants for a long time, and also has excellent properties such as wear resistance. The multi-layer combined composite coating can better improve the corrosion resistance and service life of the sandwich panel. On the other hand, the polyvinylidene fluoride coating can be applied at room temperature, which is simpler and easier to implement in terms of process, and has the advantages of fast curing speed at room temperature and high production efficiency. And the composite coatings are all made of the same material, which can greatly avoid the problems between coatings with different materials.

[0041] Setting a highly weather-resistant polyester coating on the inner surface of the color steel panel and the color steel bottom plate has better cost advantages, and the synergistic composite coating improves the overall corrosion resistance of the sandwich panel.

[0042] In the specific implementation, the high weather-resistant polyester coating is directly purchased from commercial products, which is an existing product and does not belong to the innovation and protection of this patent. High weather-resistant polyester is generally synthesized using aliphatic and alicyclic polyacids and polyol monomers to achieve a balance between resin weather resistance, processability and cost, and aromatic polyols and polyacids are not selected to reduce the resin's absorption of UV and achieve high weather resistance of the resin.

[0043] In another preferred implementation, a rectangular frame is provided on the sandwich panel, and the rectangular frame is used to strengthen the structural strength to enhance the overall structural strength of the PVC plastic decorative panel. This solves the problem of low strength of the traditional single color steel sandwich panel. The corrosion-resistant sandwich panel of this technology combines the excellent corrosion resistance and insulation of the color steel panel, and is a high-quality product of building decoration materials.

[0044] like Figure 2 As shown, the sandwich panel 20 is provided with a rectangular frame 40, which surrounds the four side walls of the sandwich panel.

[0045] In a preferred implementation, the rectangular frame 40 includes four hollow profiles 41 and four right-angle connectors 42, one right-angle connector connects two adjacent hollow profiles, and the four hollow profiles are spliced ​​by the four right-angle connectors.

[0046] Specifically, the hollow profile is made of aluminum profile. Aluminum profiles can show excellent corrosion resistance. Combined with the color steel panel, combined with the excellent corrosion resistance of the color steel panel, the corrosion-resistant sandwich panel as a whole has a good anti-corrosion effect. On the other hand, the aluminum profile has the advantages of good strength and lighter weight. The weight of the sandwich panel is appropriate and not too heavy.

[0047] Through the combination of the above-mentioned technical means, the corrosion-resistant sandwich panels of this technology have more application scenarios and meet various usage needs.

[0048] like Figure 4 As shown, the right-angle connector 42 has two plug-in parts 422 arranged perpendicular to each other; the end of the hollow profile 42 is provided with a plug-in groove 412 adapted to the plug-in part, and the right-angle connector 42 is plug-connected to the hollow profile.

[0049] In a specific implementation, the right-angle connector is made of hard plastic, and the hard plastic is any one of styrene-butylene-acrylonitrile copolymer, polyoxymethylene, polystyrene, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, and polyphenylene oxide. The right-angle connector made of hard plastic has good mechanical properties, can withstand a certain impact strength, and plays a role in preventing deformation.

[0050] In the prior art, decorative panels are spliced ​​together by plugging, such as male and female panels, where the male panel has a convex structure and the female panel has a concave structure, so as to achieve plug-in assembly of two adjacent male and female panels.

[0051] To this end, the present technology also provides a new type of plate structure, specifically a female plate in a male and female plate. Figure 4 As shown, the outer side surface of each hollow profile is provided with a first groove 411, and the length of the first groove is adapted to the length of the hollow profile; the outer side surface of the right-angle connector is provided with a second groove 421 adjacent to the first groove, and the first groove and the second groove make the side wall of the corrosion-resistant sandwich panel have a groove structure.

[0052] Specifically, the groove depth and width of the first groove and the second groove are matched, and the end groove of the first groove is connected to the end groove of the second groove, so that the groove structure is completely through. On the other hand, the setting of the first groove has the effect of strengthening the structural strength of the hollow profile.

[0053] like Figure 3 As shown, the four sides of the color steel panel 10 are respectively provided with a first edge 11 extending downward, so that the color steel panel is in a box-shaped structure; the color steel panel covers the upper surface of the sandwich plate, and the first edge is attached to the partial side wall of the sandwich plate. Through this design, the contact area between the color steel panel and the sandwich plate is increased, and an adhesive can be provided on the inner wall of the first edge to improve the fixing strength, and the box-shaped color steel panel makes the outer surface of the corrosion-resistant sandwich panel more beautiful without obvious plate edges.

[0054] In a preferred implementation, the color steel bottom plate 30 adopts a structure similar to that of the color steel panel, and the four sides of the color steel bottom plate are respectively provided with a second edge 31 extending upward, so that the color steel bottom plate has a box-shaped structure; the color steel bottom plate covers the lower surface of the sandwich panel, and the second edge is in contact with the partial side wall of the sandwich panel.

[0055] In a preferred embodiment, the color steel bottom plate is a stainless steel plate or an aluminum plate. The second edge is formed by bending the edge of the back plate, and has a certain structural reinforcement effect to enhance the overall structural strength of the decorative plate.

[0056] In a preferred embodiment, the sandwich panel 20 includes a first 3D spacer fabric layer 21, a rubber cushion layer 22, a phenolic foam layer 23 and a second 3D spacer fabric layer 24 which are sequentially arranged from top to bottom.

[0057] In this technology, 3D spacer fabric is a kind of fabric, also called three-dimensional spacer fabric. Also known as sandwich fabric, it is a three-dimensional structure fabric composed of two upper and lower surface fabric layers connected by a number of spacer yarns. The spacer yarns support the two surface fabric layers to form a spacer layer of a certain thickness. This special three-dimensional structure allows a large amount of still air to be stored in the spacer layer. Still air is the medium with the smallest thermal conductivity in nature, which makes it have better thermal insulation performance and can be used as a high-performance thermal insulation material.

[0058] In the prior art, three-dimensional spacer fabric is a double-layer woven fabric integrally woven by a three-dimensional loom. The upper fabric and the lower fabric are connected by column yarns running through the fabric, and the interior is hollow. The three-dimensional woven spacer fabric composite material has the advantages of light weight, high strength and excellent integrity.

[0059] The sandwich panel made by combining three-dimensional spacer fabric with phenolic foam layer has good impact resistance and other mechanical properties. On the other hand, the inner layer of the sandwich is strengthened by rubber pad, which gives it good strength and other mechanical properties, improving the application scenarios of the product.

[0060] In a specific implementation, the rubber cushion layer is made of chlorinated butyl rubber cushion, which is made by passing chlorine into a butyl rubber solution. Chlorobutyl rubber is an important material for shock-absorbing products, has excellent heat resistance, and the vulcanized rubber has a tight structure and excellent flexural resistance. The purpose is to improve the strength of the sandwich panel, improve the vibration absorption ability and have a certain sound insulation effect.

[0061] For other structures of the corrosion-resistant sandwich panel described in this embodiment, refer to the prior art.

[0062] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A corrosion-resistant sandwich panel, characterized in that: It includes color steel panels, sandwich panels and color steel bottom panels which are tightly stacked from top to bottom; The outer surfaces of the color steel panel and the color steel bottom plate are both provided with a composite coating, and the composite coating comprises a first polyvinylidene fluoride coating and a second polyvinylidene fluoride coating which are closely attached in sequence; The inner surfaces of the color steel panel and the color steel bottom plate are both provided with a highly weather-resistant polyester coating.

2. The corrosion-resistant sandwich panel according to claim 1, characterized in that: The thickness of the first polyvinylidene fluoride coating and the second polyvinylidene fluoride coating is 20 to 30 μm; The thickness of the highly weather-resistant polyester coating is 5 to 12 μm.

3. A corrosion-resistant sandwich panel according to claim 1 or 2, characterized in that: The first polyvinylidene fluoride coating is used to coat the outer surfaces of the color steel panel and the color steel bottom plate; The outer surface of the second polyvinylidene fluoride coating is provided with a super hydrophobic coating.

4. The corrosion-resistant sandwich panel according to claim 3, characterized in that: The sandwich panel comprises a first rubber cushion layer, a polyester foam layer and a second rubber cushion layer which are closely attached in sequence; The first rubber cushion layer is closely fitted to the inner surface of the color steel panel, and the second rubber cushion layer is closely fitted to the inner surface of the color steel bottom plate.

5. The corrosion-resistant sandwich panel according to claim 4, characterized in that: The first rubber cushion layer and the second rubber cushion layer are both made of hydrogenated nitrile rubber.

6. The corrosion-resistant sandwich panel according to claim 5, characterized in that: The sandwich panel is provided with a rectangular frame, and the rectangular frame surrounds four side walls of the sandwich panel; The rectangular frame includes four hollow profiles and four right-angle connectors, one right-angle connector connects two adjacent hollow profiles, and the four hollow profiles are spliced ​​through the four right-angle connectors.

7. The corrosion-resistant sandwich panel according to claim 6, characterized in that: The four sides of the color steel panel are respectively provided with first edges extending downward, so that the color steel panel has a box-shaped structure; The color steel panel covers the upper surface of the sandwich panel, and the first edge is attached to a partial side wall of the sandwich panel.

8. The corrosion-resistant sandwich panel according to claim 7, characterized in that: The four sides of the color steel bottom plate are respectively provided with second edges extending upward, so that the color steel bottom plate has a box-shaped structure; The color steel bottom plate covers the lower surface of the sandwich plate, and the second edge is attached to a partial side wall of the sandwich plate.

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