Stainless steel exterior trimming steel plate for automobile

Abstract

The utility model discloses a stainless steel exterior trimming steel plate for an automobile, which comprises a stainless steel base material layer, a steel protective layer, a bonding layer, a protective film layer and an appearance coating are sequentially arranged on one surface of the stainless steel base material layer in the thickness direction from inside to outside, the steel protective layer is a chromium-free, phosphorus-free and formaldehyde-free steel plate protective layer, and the appearance coating is a paint coating. The steel protection layer is non-toxic and environment-friendly, meets the environment-friendly requirement, and can improve the protection on the base material layer, improve the corrosion resistance and other functions of the product and prolong the service life of the product; the protective film is additionally arranged, protection on the base material layer is further improved, some functions such as ultraviolet resistance and aging resistance can be increased, and meanwhile the adhesive layer is adopted to improve the adsorption combining capacity of the protective film and the steel protective layer. And finally, an appearance coating is additionally arranged on the outer layer of the protective film, and the color of the appearance coating is selected according to actual requirements, so that the product has various colors, and the market competitiveness of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing coated metal plates, and particularly relates to stainless steel exterior plates for automobiles. Background Art

[0002] Due to their strong surface corrosion resistance and high-quality and beautiful appearance, stainless steel exterior parts for automobiles are pursued by more and more consumers. In order to meet the needs of consumers, major automobile manufacturers have added a large number of such decorative parts in the non-functional areas of the vehicle body. The main parts include window frame trim strips, door handle trim parts, door welcome trim panels, SUV pedal trim parts, etc.

[0003] The existing exterior steel plates for automobiles are generally made by spraying paint on the surface of a stainless steel substrate. The problems of the exterior steel plates for automobiles in the above technical solutions are simple structures and poor functionality, such as poor anti-corrosion and heat insulation effects and poor aesthetics. Therefore, it is necessary to provide a new stainless steel exterior plate for automobiles to solve the above technical problems. Summary of the Utility Model

[0004] To solve at least one of the above technical problems, the purpose of the utility model is to provide a stainless steel exterior plate for automobiles.

[0005] Based on the above problems, the technical solution provided by the utility model is as follows:

[0006] The purpose of the utility model is to provide a stainless steel exterior plate for automobiles, including a stainless steel substrate layer. On one surface of the stainless steel substrate layer in the thickness direction, a steel protection layer, an adhesive layer, a protective film layer, and an appearance coating are sequentially arranged from inside to outside. The steel protection layer is a chromium-free, phosphorus-free, and aldehyde-free steel plate protection layer, and the appearance coating is a paint coating.

[0007] In some embodiments, the protective film is a PET film, a PDF film, or a POD film.

[0008] In some embodiments, the material of the stainless steel substrate layer is 3-series stainless steel or 4-series stainless steel.

[0009] In some embodiments, the adhesive layer is nano glue.

[0010] In some embodiments, the adhesive layer is combined on the surface of the steel protection layer facing away from the stainless steel substrate layer by coating or spraying.

[0011] In some embodiments, the protective film is combined on the surface of the adhesive layer facing away from the steel protection layer by pressing.

[0012] In some embodiments, the appearance coating is a nano paint coating.

[0013] In some of these embodiments, the nano paint coating is nano water-based paint or nano oil-based paint.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] For the stainless steel exterior decorative steel plate for automobiles of the present utility model, a steel protection layer is formed on the surface of the stainless steel substrate layer, and this steel protection layer is non-toxic and environmentally friendly, meeting environmental protection requirements. It can also improve the protection of the substrate layer, enhance the corrosion resistance and other functionalities of the product, and extend the service life of the product. A protective film is additionally provided outside the steel protection layer to further improve the protection of the substrate layer, and some functionalities such as ultraviolet resistance and aging resistance can also be increased. At the same time, an adhesive layer is used to improve the adsorption and bonding ability between the protective film and the steel protection layer. Finally, an appearance coating is additionally provided outside the protective film, and the color of the appearance coating is selected according to actual needs, making the product have diverse colors and improving the market competitiveness of the product. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the stainless steel exterior decorative steel plate for automobiles of the present utility model.

[0018] Wherein:

[0019] 10. Stainless steel substrate layer; 20. Steel protection layer; 30. Adhesive layer; 40. Protective film layer; 50. Appearance coating. Specific Embodiments

[0020] The following further explains the above solutions in combination with specific embodiments. It should be understood that these embodiments are for explaining the present utility model and not for limiting the scope of the present utility model. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0021] For the stainless steel exterior decorative steel plate for automobiles in the embodiments of the present utility model, see Figure 1, from bottom to top, it successively includes a stainless steel substrate layer 10, a steel protective layer 20, an adhesive layer 30, a protective film layer 40, and an appearance coating layer 50. That is, on one surface (exemplarily the upper surface in the figure) in the thickness direction of the stainless steel substrate layer 10, there are successively arranged a steel protective layer 20, an adhesive layer 30, a protective film layer 40, and an appearance coating layer 50 from inside to outside. Among them, the stainless steel substrate layer 10 is subjected to ultrasonic cleaning and degreasing treatment with an alkaline solution to clean the surface of the stainless steel substrate layer 10 to remove sundries such as oil stains on the surface so as not to affect the adsorption of the subsequent steel protective layer 20. Then, a steel protective layer 20 is combined on one surface (exemplarily the upper surface in the figure) of the stainless steel substrate layer 10. It should be noted that the steel protective layer 20 in the embodiment of the present invention is a chromium-free, phosphorus-free, and aldehyde-free steel plate protective layer. The chromium-free, phosphorus-free, and aldehyde-free steel plate protective layer is a special metal surface treatment technology aimed at improving the corrosion resistance and other properties of the steel plate while avoiding the use of harmful chemical substances such as chromium, phosphorus, and aldehydes. This protective layer is usually achieved through a series of innovative processes and environmentally friendly materials to meet the high requirements of modern industry for material safety and environmental protection. Characteristics of the chromium-free, phosphorus-free, and aldehyde-free steel plate protective layer: Environmental friendliness: It does not use harmful substances such as chromium, phosphorus, and aldehydes, reducing potential harm to the environment and the human body. Corrosion resistance: Through special treatment processes and materials, a dense protective film is formed to effectively isolate corrosive media and improve the corrosion resistance of the steel plate. Aesthetic property: The surface of the protective layer is flat and smooth, and the color and gloss can be adjusted according to needs to meet the aesthetic requirements of different application scenarios. Durability: The protective layer is firmly bonded to the steel plate substrate and is not easily peeled off or cracked, ensuring the stability and reliability of long-term use. For the implementation method of the chromium-free, phosphorus-free, and aldehyde-free steel plate protective layer, no special description and limitation are made, and it may include but is not limited to chromium-free passivation technology: using an environmentally friendly passivating agent to form a dense protective film on the steel plate surface; organic coating technology: coating an environmentally friendly organic coating on the steel plate surface, such as epoxy resin, acrylic resin, etc.; composite treatment technology: combining multiple surface treatment technologies, such as phosphating, oxidation, galvanizing, etc., to form a composite protective layer, and by optimizing the ratio of each layer of material and process parameters, while achieving chromium-free, phosphorus-free, and aldehyde-free, improving the comprehensive performance of the steel plate. Then, an adhesive layer 30 is coated or sprayed on the outer surface of the steel protective layer 20, that is, the side facing away from the stainless steel substrate layer 10, for the purpose of subsequent adsorption of the protective film layer 40. Then, a protective film layer 40 is adsorbed on the outer surface of the adhesive layer 30, that is, the side facing away from the steel protective layer 20, by means of pressing. Finally, an appearance coating layer 50 is provided on the outer surface of the protective film layer 40, that is, the side facing away from the adhesive layer 30. The purpose of this appearance coating layer 50 is to make the color of the steel plate diverse and improve the aesthetic property. That is to say, the appearance coating layer 50 can select different colors according to actual needs.

[0022] In summary, the stainless steel exterior steel plate for automobiles in the embodiment of the utility model forms a steel protection layer 20 on the surface of the stainless steel substrate layer 10, and the steel protection layer 20 is non-toxic and environmentally friendly, meets environmental protection requirements, and can also improve the protection of the substrate layer, improve the corrosion resistance and other functionality of the product, and extend the service life of the product. A protective film is added outside the steel protection layer 20 to further improve the protection of the substrate layer, and some functionality such as UV resistance and aging resistance can also be added. At the same time, an adhesive layer 30 is used to improve the adsorption and bonding ability of the protective film and the steel protection layer 20. Finally, a layer of appearance coating 50 is added to the outer layer of the protective film, and the color of the appearance coating 50 is selected according to actual needs, so that the product color is diverse and the market competitiveness of the product is improved.

[0023] As for the material of the stainless steel substrate layer 10, in the embodiment of the utility model, conventional 3 series or 4 series stainless steel on the market can be selected, such as 304, 321, 410, 430, etc. The thickness of the stainless steel substrate is not limited and can be selected to be 0.2-1.0 mm.

[0024] For the bonding layer 30, conventional nano glue on the market is preferred in the embodiment of the utility model. It has high temperature resistance, does not corrode objects, is firmly bonded, and is not easy to fall off even under exposure. For the thickness of the bonding layer 30, no special limitation or description is made, and those skilled in the art can select and design it according to the actual scene or the usage requirement of the nano glue.

[0025] For the protective film layer 40, it can be an existing conventional PET protective film, PDF film or POD film. The POD (polyoxadiazole) film refers to a special porous breathable film material, which is made of ultra-high molecular weight polyethylene powder through a special process, has breathability and a low friction coefficient, and at the same time maintains the chemical resistance, wear resistance and adhesion elimination of ultra-high molecular weight polyethylene. This film is widely used in semiconductor manufacturing equipment. For example, it can play a key protective role in sensors. In the embodiment of the present utility model, the protective film layer 40 is preferably a PDF film. The PDF film usually refers to a polyvinylidene fluoride (PVDF) film, which is a polymer material. The PVDF film has excellent weather resistance, chemical corrosion resistance, oxidation resistance and light aging resistance. This film material has been specially treated and has good hydrophilic properties, which can effectively improve the filtration effect of the membrane element and obtain a higher water production. The PVDF film also has good chemical corrosion resistance, oxidation resistance and light aging resistance. Regular cleaning can effectively remove the impurities contained inside the film. In addition, the PVDF film material has a wide range of applications in membrane structure engineering, such as membrane structure engineering in the fields of building roofs and facades, stadiums, exhibition halls, storage facilities, etc. The characteristics of the PVDF film material make it an ideal choice for various application scenarios, especially in occasions where weather resistance and high appearance requirements are needed. For example, it is often used in membrane structure engineering in high-end building projects, airport terminals, large event venues, exhibition centers, etc. that require weather resistance and high appearance requirements. In addition, the PVDF film material is also used to make photovoltaic backsheets. Because of its good weather resistance and chemical corrosion resistance, it can effectively protect solar cells from environmental factors and improve the service life and performance of solar cells. In summary, the PDF film used in the present utility model has the functions of ultraviolet resistance and anti-aging. Since the exterior steel plates of automobiles often need to be exposed to sunlight, it can improve the ultraviolet resistance and anti-aging performance of the steel plates, thereby improving the service life of the products. The protective film in the embodiment of the present utility model can be optionally combined with the upper surface of the adhesive layer 30 in a pressing manner through an existing conventional pressing tooling to protect the steel protection layer 20 and avoid bumping and breaking during handling and transportation. Regarding the thickness of the protective film, no special description or limitation is made either. Those skilled in the art can select and design the thickness of the protective film according to the working conditions of the product to improve its protective performance.

[0026] For the appearance coating 50, in the embodiment of the present utility model, it is preferably an existing conventional nano paint on the market. Exemplarily, it can be a nano water-based paint or a nano oil-based paint. The nano water-based paint is environmentally friendly, has high construction efficiency and good weather resistance and wear resistance; the nano oil-based paint is relatively cheaper in price and has relatively better durability. Regarding its thickness, no special limitation is made either. Those skilled in the art can select a suitable thickness design according to the different uses of the exterior steel plates on the automobile.

[0027] In addition, it should be noted that Figure 1 the thickness shown for each layer in does not represent its actual thickness.

[0028] The above examples are only for explaining the technical concept and characteristics of the present utility model, and the purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly. It cannot be used to limit the protection scope of the present utility model. Any equivalent transformation or modification made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. The stainless steel exterior decorative steel plate for automobiles is characterized in that, It includes a stainless steel substrate layer, and on one surface in the thickness direction of the stainless steel substrate layer, there are successively arranged a steel protection layer, an adhesive layer, a protective film layer, and an appearance coating from inside to outside. The steel protection layer is a chromium-free, phosphorus-free, and formaldehyde-free steel plate protection layer, and the appearance coating is a paint coating.

2. The stainless steel exterior steel plate for automobiles according to claim 1, characterized in that, The protective film is a PET film, a PDF film, or a POD film.

3. The stainless steel exterior decorative steel plate for automobiles according to claim 1, wherein The material of the stainless steel substrate layer is 3-series stainless steel or 4-series stainless steel.

4. The stainless steel exterior steel plate for automobiles according to claim 1, wherein The adhesive layer is a nano glue.

5. The stainless steel exterior decorative steel plate for automobiles according to claim 1 or 4, characterized in that, The adhesive layer is combined on the surface of the steel protection layer facing away from the stainless steel substrate layer by means of coating or spraying.

6. The stainless steel exterior decorative steel plate for automobiles according to claim 1 or 2, characterized in that, The protective film is combined on the surface of the adhesive layer facing away from the steel protection layer by means of pressing.

7. The stainless steel exterior steel plate for automobiles according to claim 1, wherein The appearance coating is a nano paint coating.

8. The stainless steel exterior decorative steel plate for automobiles according to claim 7, characterized in that, The nano paint coating is a nano water-based paint or a nano oil-based paint.

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