Colored steel plate

Abstract

This utility model relates to a color-coated steel sheet, comprising: a metal substrate having multiple through holes; fiber filaments that weave and interweave between the through holes in the metal substrate to form a base fabric layer that is spatially interconnected with and covers the metal substrate, the base fabric layer and the metal substrate forming a steel mesh sheet; and a resin protective layer that fills the gaps in the steel mesh sheet and covers it. The advantages are: combining the perforated metal sheet with the woven fiber base fabric fundamentally solves the defects of traditional color-coated steel sheets, such as low tensile strength and easy tearing; the outer dense resin film (such as PTFE or non-PTFE resin) completely fills and covers the metal substrate, thoroughly isolating moisture and corrosive media, avoiding corrosion problems caused by coating damage; and the addition of a foamed resin layer on the outside of the steel mesh sheet significantly improves heat insulation and sound insulation performance, solving the "drumming effect" and thermal bridging problems of traditional color-coated steel sheets.

Description

Technical Field

[0001] This utility model relates to the field of building material technology, and in particular to a color-coated steel plate. Background Technology

[0002] Color-coated steel sheets (i.e., color-coated steel sheets) are widely used as lightweight, aesthetically pleasing, and easy-to-install building cladding materials in the exterior walls and roofs of industrial plants, warehouses, prefabricated houses, cold storage facilities, and public buildings. Their typical structure consists of a cold-rolled substrate, a galvanized or aluminized zinc coating, an organic coating (such as polyester, silicone-modified polyester, PVDF, etc.), and an organic insulation core material (such as polystyrene, rock wool, polyurethane, etc.). However, with the increasing demands for energy conservation, safety, environmental protection, and durability in buildings, traditional color-coated steel sheets have revealed numerous technical defects in practical applications, severely hindering their further promotion in the construction field. Specific defects are as follows:

[0003] 1. Significant challenges in environmental recycling: Traditional color-coated steel sheets are made by bonding metal panels with organic core materials (such as polyurethane and polystyrene). Effective separation between the metal and organic materials is difficult, leading to high costs and complex technologies for recycling and processing waste sheets. Currently, most waste color-coated steel sheets end up in landfills or incineration, which not only occupies land resources but also releases toxic gases (such as dioxins) during incineration, placing a serious burden on the ecological environment. This is inconsistent with the national "dual-carbon" strategy and the development direction of a circular economy.

[0004] 2. Significant shortcomings in mechanical properties: The tensile strength of traditional color steel plates mainly depends on the thickness of the substrate (usually 0.4mm to 0.8mm), resulting in insufficient overall structural rigidity. Under wind suction, snow load, or localized concentrated loads, they are prone to deformation or even buckling failure. More seriously, their tear resistance is extremely poor: Due to the poor performance of the metal substrate and coating in dealing with concentrated stress or localized damage, once cracks or small holes appear at the edges of the plate, drilled holes, or surface coating due to impacts, improper installation, aging, etc., the cracks can easily expand and extend rapidly along the plate direction under wind load, snow load, or construction load (i.e., "tear"), causing large-area damage to the enclosure system and even leading to safety accidents. This damage is particularly prominent in areas prone to strong winds and typhoons.

[0005] 3. Insufficient corrosion and weather resistance: Although the surface of the color steel plate is coated with an organic coating and a galvanized layer, minor bumps and scratches during transportation, installation, or use can damage the coating, exposing the metal substrate which then rapidly undergoes electrochemical corrosion. The rust products not only affect the appearance but also weaken the structural load-bearing capacity. In harsh environments such as acid rain, coastal high-salt fog, and industrial pollution, ordinary polyester coatings are prone to chalking and peeling, significantly reducing durability, resulting in high maintenance costs, affecting aesthetics, and further weakening structural strength.

[0006] 4. Poor acoustic and thermal performance: Traditional color steel panels are thin-walled metal structures with a significant "drum-like effect." Noise from raindrops, wind vibration, or equipment operation is amplified by the metal panels, resulting in a poor indoor acoustic environment. Furthermore, due to poor sound insulation, whispers in prefabricated houses are easily heard. Simultaneously, the high thermal conductivity of metal materials and lack of effective thermal resistance cause a rapid increase in surface temperature under summer sunlight, leading to quick heat transfer into the room and significantly increasing air conditioning energy consumption. In winter, cold bridges are easily formed, increasing the risk of condensation and affecting user comfort and building energy efficiency.

[0007] Furthermore, existing color steel panels are mostly designed with a single function in mind, making it difficult to balance structural strength, fire resistance, self-cleaning ability, and sustainability. Although some high-end products use PVDF coatings or add insulation layers to improve performance, they still do not fundamentally solve the inherent defects brought about by the composite structure of the materials.

[0008] Therefore, this case is brought. Utility Model Content

[0009] The purpose of this utility model is to provide a color-coated steel sheet that can significantly improve its mechanical properties, durability, energy-saving and environmental protection characteristics and recyclability while retaining the advantages of color-coated steel sheets such as light weight, beautiful appearance and convenient construction.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] A color-coated steel sheet, comprising:

[0012] A metal substrate having multiple through holes;

[0013] Fiber filaments, which shuttle and weave between the through holes of the metal substrate to form a base fabric layer that is interconnected with and covers the metal substrate, and the base fabric layer and the metal substrate form a steel mesh fabric plate.

[0014] A resin protective layer fills the gaps in the steel mesh fabric and encases the steel mesh fabric.

[0015] Furthermore, the fiber filament is a non-metallic fiber filament.

[0016] Furthermore, the fiber filament is one or more of the following: glass fiber filament, aramid fiber filament, carbon fiber filament, polyethylene fiber filament, polyester fiber filament, polypropylene fiber filament, and basalt fiber filament.

[0017] Furthermore, the resin protective layer is filled and coated with PTFE resin.

[0018] Furthermore, the resin protective layer includes a foamed resin layer on one side of the steel mesh fabric and a resin film layer on the other side of the steel mesh fabric.

[0019] Furthermore, the resin film layer is filled and coated with PTFE resin.

[0020] Furthermore, the resin film layer is filled and coated with non-PTFE resin, and the outer surface of the resin film layer is coated with a surface treatment layer.

[0021] Furthermore, the surface treatment layer adopts one or more of the following: PVDF coating, nano-titanium dioxide photocatalytic self-cleaning coating, liquid acrylic coating, and fluorocarbon coating.

[0022] The advantages of this utility model are:

[0023] 1. The new type of color-coated steel sheet innovatively combines perforated metal sheets with fiber-woven base fabric to form a spatially interconnected "steel mesh fabric sheet" structure, fundamentally solving the fatal defects of traditional color-coated steel sheets, such as low tensile strength and easy tearing. The introduction of high-strength fiber filaments (such as aramid and glass fiber) can effectively inhibit crack propagation, significantly improving the overall mechanical properties and structural safety of the sheet, especially under extreme conditions such as wind loads and snow loads.

[0024] 2. In terms of durability and environmental adaptability, the product completely fills and coats the metal substrate with a dense outer resin film (such as PTFE or non-PTFE resin), thoroughly isolating it from moisture and corrosive media, thus avoiding rust problems caused by coating damage. Combined with PVDF, nano-titanium dioxide photocatalysis, or PTFE self-cleaning surface treatment technology, it achieves excellent weather resistance, stain resistance, and maintenance-free characteristics, making it suitable for harsh environments such as acid rain, coastal salt spray, and industrial pollution, with a service life far exceeding that of traditional color steel plates.

[0025] 3. By setting a foamed resin layer (such as PU, PP, etc.) on the outside of the steel mesh panel, the heat insulation and sound insulation performance are greatly improved, effectively reducing building energy consumption and improving the indoor acoustic environment, and solving the "drumming effect" and thermal bridging problems of traditional color steel panels.

[0026] 4. The use of cut-flocking fabric process can achieve efficient separation of metal substrate and fiber filament material, enabling waste board to be recycled and reused, reducing construction waste at the source, which is in line with the development direction of green building and circular economy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the perforated metal plate in Example 1;

[0028] Figure 2 This is a schematic diagram of the steel mesh fabric plate in Example 1;

[0029] Figure 3 This is an exploded view of the color filter steel plate in Example 1;

[0030] Figure 4 This is a schematic diagram of the finished product of the color filter steel plate in Example 1;

[0031] Figure 5 This is an exploded view of the color filter steel plate in Example 2;

[0032] Figure 6 This is a schematic diagram of the finished product of the color filter steel plate in Example 2.

[0033] Label Explanation

[0034] 1. Metal substrate; 2. Fiber filaments; 3. Resin film layer; 4. Resin foam layer. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] Example 1

[0037] This embodiment proposes a corrosion-resistant color-coated steel sheet, such as... Figures 1 to 4 As shown, it includes a metal substrate, fiber filaments, and a resin protective layer. The metal substrate can be made of galvanized steel sheet, aluminized zinc steel sheet, or stainless steel sheet, with a thickness between 0.4 mm and 1.2 mm. Holes are drilled in the metal substrate using a drilling device to form a structure as shown. Figure 1 The diagram shows a metal substrate with several through holes on its surface. Fibers weave and interweave between these through holes, forming a base fabric layer that is spatially interconnected with and covers the metal substrate. In this embodiment, the composite structure of the base fabric layer and the metal substrate is defined as a steel mesh fabric plate. The introduction of high-strength fiber filaments effectively inhibits crack propagation, significantly improving the overall mechanical properties and structural safety of the plate, fundamentally solving the fatal defects of traditional color steel plates, such as low tensile strength and easy tearing. A resin protective layer fills the gaps within the steel mesh fabric plate (such as gaps between fiber filaments, gaps between fiber filaments and the surface of the metal substrate, and gaps between fiber filaments and through holes) and encapsulates the steel mesh fabric plate. The resin protective layer provides corrosion resistance, sound insulation, and heat insulation, extending the product's service life.

[0038] Preferably, in this embodiment, the fiber filament is a non-metallic fiber filament, which can be one or more of the following: glass fiber filament, aramid fiber filament, carbon fiber filament, polyethylene fiber filament, polyester fiber filament, polypropylene fiber filament, and basalt fiber filament. The type of fiber filament selected can be determined according to the on-site working conditions. The following is a statistical table of the performance characteristics of different fiber filaments, the role of the color-coated steel plate in this embodiment, and applicable scenarios.

[0039]

[0040]

[0041] In this embodiment, the resin protective layer is made of PTFE resin, which fills and coats the steel mesh plate. PTFE resin itself has self-cleaning and corrosion-resistant properties, eliminating the need for an additional coating. By adding pigments to the resin material during processing, a smooth, glossy, and colorful film can be formed on the surface of the steel mesh plate.

[0042] The color-coated steel sheet of this embodiment has good environmental performance and recyclability. The use of spun cloth process can achieve efficient separation of metal substrate and fiber filament material, so that waste sheet can be recycled and reused, reducing construction waste from the source, which is in line with the development direction of green building and circular economy.

[0043] Example 2

[0044] This embodiment is similar in principle to Embodiment 1, both combining a perforated metal plate with a fiber-woven base fabric to form a spatially interconnected "steel mesh fabric plate" structure, fundamentally solving the fatal defects of traditional color steel plates, such as low tensile strength and easy tearing. The difference lies in the modification of the resin protective layer in this embodiment. For example... Figure 5 and Figure 6 As shown, the resin protective layer in this embodiment includes a foamed resin layer on one side of the steel mesh panel and a resin film layer on the other side of the steel mesh panel. The foamed resin layer has good sound and heat insulation effects and serves as the inner surface (i.e., the indoor side). Specifically, easily foamable resins such as PU, PP, and PE can be selected. The resin film layer uses PTFE resin to fill and coat the steel mesh panel and can be used on the outdoor side. PTFE resin has low surface energy and chemical inertness, giving it good self-cleaning properties and corrosion resistance, allowing it to meet the requirements of most harsh environments without the need for additional functional coatings.

[0045] Example 3

[0046] This embodiment is similar in principle to Embodiment 2, except that the resin film layer in Embodiment 2 used PTFE resin, while the resin film layer in this embodiment uses a non-PTFE resin, such as polyethylene (PE), polypropylene (PP), polyester (PET), or acrylic resin. Since non-PTFE resins lack self-cleaning and corrosion-resistant properties, this embodiment coats the outer surface of the non-PTFE resin film layer with a surface treatment layer, such as one or more of PVDF coating, nano-titanium dioxide photocatalytic self-cleaning coating, liquid acrylic coating, or fluorocarbon coating, to improve self-cleaning and corrosion resistance. The nano-titanium dioxide photocatalytic self-cleaning coating also provides antibacterial properties.

[0047] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A color-coated steel sheet, characterized in that, include: A metal substrate having multiple through holes; Fiber filaments, which shuttle and weave between the through holes of the metal substrate to form a base fabric layer that is interconnected with and covers the metal substrate, and the base fabric layer and the metal substrate form a steel mesh fabric plate. A resin protective layer fills the gaps in the steel mesh fabric and encases the steel mesh fabric.

2. The color-coated steel sheet as described in claim 1, characterized in that, The fiber filaments are non-metallic fiber filaments.

3. A color-coated steel sheet as described in claim 2, characterized in that, The fiber filament is one or more of the following: glass fiber filament, aramid fiber filament, carbon fiber filament, polyethylene fiber filament, polyester fiber filament, polypropylene fiber filament, and basalt fiber filament.

4. A color-coated steel sheet as described in claim 1, characterized in that, The resin protective layer is filled and coated with PTFE resin.

5. A color-coated steel sheet as described in claim 1, characterized in that, The resin protective layer includes a foamed resin layer on one side of the steel mesh board and a resin film layer on the other side of the steel mesh board.

6. A color-coated steel sheet as described in claim 5, characterized in that, The resin film layer is filled and coated with PTFE resin.

7. A color-coated steel sheet as described in claim 5, characterized in that, The resin film layer is filled and coated with non-PTFE resin, and the outer surface of the resin film layer is coated with a surface treatment layer.

8. A color-coated steel sheet as described in claim 7, characterized in that, The surface treatment layer is one or more of the following: PVDF coating, nano-titanium dioxide photocatalytic self-cleaning coating, liquid acrylic coating, and fluorocarbon coating.

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