CN211647063U - Graphene powder coated aluminum veneer for architectural decoration - Google Patents

Abstract

The utility model discloses a graphite alkene powder coating aluminium veneer for architectural decoration, including aluminum alloy base plate, chromizing film, graphite alkene finish paint layer, fluororesin varnish layer. The production process of the aluminum veneer comprises three parts, namely a sheet metal process, a pretreatment process and a spraying process, wherein the surface coating technology of the aluminum veneer adopts a ' two-coating and two-baking ' process, namely a two-coating and two-baking ' process, wherein the pretreatment process is finished to form a chromized film, the chromized film is baked at 80 ℃ for 8min-10min to remove clear water residue on the surface of the aluminum plate in the pretreatment process so that the aluminum plate reaches a state suitable for spraying, and then graphene finish paint and fluororesin varnish are sequentially sprayed and baked at 220 ℃ to 250 ℃ for 10 min-. The utility model discloses a graphite alkene powder coating is as the finish paint layer of aluminium veneer and the architectural decoration material new product of the production technology development through "two are scribbled two and are baked" has new performances such as good heat conduction, ultraviolet resistance, fire-retardant, corrosion-resistant, more is fit for using on the coastal or offshore structure outer wall decoration of the abominable, high corrosivity of environment and salt fog nature.

Description

Graphene powder coated aluminum veneer for architectural decoration

Technical Field

The utility model relates to a graphite alkene powder coating aluminium veneer for architectural decoration belongs to architectural decoration material technical field

Background

The requirements of the building design industry for green environmental protection, high efficiency and energy conservation of building material products are stronger at present, but the production industry of aluminum veneers for downstream building decoration still mainly sprays solvent type fluorocarbon paint, the pressure maintaining force in the production process of the products is huge, although a pollution-free solvent-free powder spraying process is provided, the powder spraying does not have the excellent ultraviolet resistance of fluorocarbon spraying, and the products fade even in 3-5 years under long-term sunlight irradiation, so that the building appearance has obvious color difference. Graphene is a two-dimensional crystal formed by tightly packing carbon atoms, is the thinnest and most hard nano material known at present, and has the novel performances of ultrahigh strength, good heat conduction, ultraviolet resistance, flame retardance, corrosion resistance and the like as a novel two-dimensional nano material. If the graphene modification is combined with the existing powder spraying process technology as an additive material, the developed graphene powder-coated aluminum veneer has good heat conduction and excellent ultraviolet resistance, so that the technical problem that the building appearance is obviously color-different due to the fact that the powder spraying process product in the existing industry is easy to fade under the irradiation of ultraviolet rays is solved. Meanwhile, the graphene powder coated aluminum veneer developed in view of excellent performances of flame retardance and corrosion resistance is particularly suitable for being applied to exterior wall decoration of coastal or offshore buildings with severe environment, high corrosivity and salt fog. Meanwhile, the powder spraying process is adopted, and solvents such as benzene and xylene are not adopted, so that VOC (volatile organic compounds) emission in the production process can be effectively reduced, and the pressure on environmental protection is reduced.

The utility model provides a graphite alkene powder coating aluminium veneer for architectural decoration, through to through pretreatment process and spraying graphite alkene finish paint in proper order on the aluminum alloy base plate that forms the chromizing membrane, fluororesin varnish forms stable surface coating through toasting the solidification, make the graphite alkene powder coating aluminium veneer of development have good heat conduction with the help of graphite alkene powder coating's excellent performance, ultraviolet resistance, fire-retardant, performances such as corrosion-resistant, its performance index has further promotion for traditional powder spraying aluminium veneer.

Disclosure of Invention

The utility model aims at providing a not enough to prior art, provide a graphite alkene powder coating aluminium veneer for architectural decoration. The graphene material is modified and applied to the powder coating by virtue of the unique structure and material characteristics of the graphene material, the graphene retains the original properties after being subjected to functional modification, and the graphene is attached with the reactivity of a modified gene group, so that the dispersibility and compatibility of the graphene in a coating system can be effectively improved, the graphene and polymer resin are compounded firstly, and then the functional coating is prepared from the composite material, so that the purpose of improving the performances of good flame retardance, ultraviolet resistance, corrosion resistance and the like of the coating on the metal surface is achieved.

The utility model discloses the technical problem that will solve adopts following technical scheme to realize:

the utility model relates to a graphite alkene coating aluminum veneer for architectural decoration comprises aluminum alloy base plate, chromizing film, graphite alkene finish paint layer, fluororesin varnish layer.

Preferably, the aluminum alloy base plate is made of 3003 series aluminum alloy plates, then the required product shape is formed through sheet metal machining processes of blanking, stamping, bending, welding, polishing and the like, and a pretreatment process and a spraying process are sequentially performed after sheet metal machining is completed. The pretreatment process mainly comprises the following steps: degreasing the aluminum alloy base plate by using a degreasing agent, removing residual degreasing agent by washing with water for the first time, removing oxide by pickling, removing residual pickling solution by washing with water for the second time, performing chromizing on the aluminum alloy base plate by using a chromate solution to form a chromized film, removing residual chromate solution by washing with water for the third time, baking for the first time, and removing residual clear water on the surface of the aluminum alloy base plate by baking for 8-10 min at 80 ℃, thereby finishing the pretreatment process; the spraying process comprises the steps of spraying diluted graphene powder coating on the surface of an aluminum alloy base layer plate which is subjected to a pretreatment process, performing a leveling process, spraying a fluororesin varnish layer on the leveled graphene varnish layer, performing a leveling process, and finally baking at 220-250 ℃ for 10-15 min to solidify the whole plate surface coating.

Preferably, the aluminum alloy base plate needs to be shaped through a sheet metal process, two grinding procedures of coarse grinding and fine grinding are respectively needed before spraying to improve the roughness of the surface of the aluminum alloy base plate, so that the adhesion of a paint film on the aluminum alloy base plate is improved, the aluminum alloy base plate needs to be subjected to alkali washing degreasing, acid washing oxide removal and chromizing before spraying to form a protective chromized film, and the residual of a treatment solution is washed away by clear water, so that the surface of the treated aluminum alloy base plate achieves the purpose of corrosion prevention of a base material, and meanwhile, the treated surface effect can meet the requirement of graphene powder spraying, so that the graphene powder paint can be attached to the surface of the aluminum alloy base plate to the maximum extent.

Preferably, the chromizing film is formed by spraying a chromate solution on the aluminum alloy base layer plate to form a compact golden-yellow chromizing film on the surface of the aluminum alloy base layer plate, the formed chromizing film can protect the metal surface to improve the corrosion resistance of the base material, and can improve the adhesive force of the graphene finish paint layer to the aluminum base material, and the thickness of the chromizing film is about 5 mu m.

Preferably, the graphene finish paint layer is prepared by firstly performing functional modification on a graphene material to improve the dispersibility and compatibility of graphene in a paint system, then compounding the graphene and epoxy resin to prepare a functional paint, and spraying the novel functional paint on an aluminum alloy base layer plate to improve the ultraviolet resistance, corrosion resistance, flame retardance and other properties of the aluminum alloy base layer plate, wherein the thickness of the formed graphene finish paint layer is 30 micrometers.

Preferably, the fluororesin varnish layer is a colorless and transparent varnish layer with fluororesin as a main component, and is coated on the graphene top coat layer to achieve the purposes of protecting the top coat, improving the corrosion resistance and keeping the glossiness, and the thickness of the formed varnish layer is 15 μm.

The beneficial effects of the utility model are that, the utility model discloses remove to make compound functional coating in applying powder coating after carrying out the functionalization modification with graphite alkene material for the first time, this coating is used and is removed the aluminium veneer that has novel material coating who adopts the technical process of "two scribbles two roast" to obtain in the metal surface spraying and is applied to the architectural decoration field, the graphite alkene powder that obtains with the help of graphite alkene material's excellent performance spouts the ultraviolet resistance of aluminium veneer, corrosion resistance, performances such as fire resistance promote greatly, for in the abominable area of environment, coastal area and coastal waters building exterior finishing material's application provides better selection.

Drawings

Fig. 1 is a schematic structural view of a graphene powder coated aluminum single plate of the present invention;

in the figure, 1, an aluminum alloy base plate; 2. chromizing the film; 3. a graphene topcoat layer; 4. fluororesin varnish layer

Detailed Description

The invention will be further elucidated with reference to a specific embodiment and a drawing.

As shown in fig. 1, a graphene coated aluminum veneer for architectural decoration comprises an aluminum alloy base layer plate 1, a chromizing film 2, a graphene finish paint layer 3 and a fluororesin varnish layer 4, wherein the aluminum alloy base layer 1 is 2.5mm thick or 3.0mm thick and is 3003 series aluminum alloy, the aluminum alloy base layer is made of 3003 series aluminum alloy, the aluminum alloy base layer is made to reach a required shape through a sheet metal processing technology, and the surface to be sprayed is polished by 80-mesh abrasive paper to treat defects of scratches, pits, indentations and the like on the surface of the plate, so that the roughness of the surface to be sprayed is increased, and the adhesive; the chromizing film 2 is a compact golden protective film which is formed by spraying chromate solution on the aluminum alloy base layer plate in the chromizing process in the pretreatment process, has the thickness of about 5 mu m, and can increase the corrosion resistance of the base material and the adhesive force of the graphene finish paint layer 3 on the aluminum alloy base layer plate 1; the graphene finish paint layer 3 is formed by spraying powder paint formed by compounding modified graphene serving as an additive material with the powder paint, firstly, the graphene material is functionally modified to improve the dispersibility and compatibility of the graphene in a paint system, then the graphene is compounded with epoxy resin to prepare functional paint for spraying an aluminum alloy base layer plate, and finally, a finish paint layer with the thickness of about 30 micrometers is formed; the fluororesin varnish layer 4 is a colorless and transparent varnish layer which takes fluororesin as a main component and has the thickness of about 15 mu m, and is coated on the graphene top coat layer 3 to achieve the purposes of protecting the top coat, improving the corrosion resistance and keeping the glossiness.

As shown in fig. 1, a graphene coated aluminum veneer for architectural decoration is produced by a sheet metal process, a pretreatment process and a spraying process, wherein the spraying process adopts a "two-coating and two-baking" production technology. The sheet metal process comprises the working procedures of blanking, stamping, bending, welding, polishing and the like; the pretreatment process comprises the working procedures of alkali washing and degreasing, acid washing to remove oxides, chromizing to form a chromized film, washing with clear water to remove solution residues, baking to remove clear water residues and the like; the spraying process comprises the working procedures of spraying graphene finish, leveling the finish, spraying fluororesin varnish, leveling the varnish, baking and curing and the like; in the production technology of 'two-coating and two-baking', two coatings are sprayed with graphene finish and fluororesin varnish, the two coatings are baked for 8min-10min at 80 ℃ after pretreatment is finished to remove clear water residue on the board surface in the pretreatment process, and the coatings are baked for 10min-15min at 220 ℃ to 250 ℃ after the varnish layer is sprayed to cure the coatings to finally complete the whole production process.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (1)

1. The graphene powder coated aluminum veneer for architectural decoration is characterized by comprising an aluminum alloy base plate, a chromizing film, a graphene finish paint layer and a fluororesin varnish layer; the aluminum alloy base plate is made of 3003 series aluminum alloy plates; the graphene finish paint layer is made of graphene powder paint; the fluororesin varnish layer is a normal-temperature curing type two-component colorless transparent varnish layer with fluororesin as a main component; the thickness of the graphene finish paint layer is 30 micrometers, and the thickness of the fluororesin varnish layer is 15 micrometers.

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