JPH03224952A - High weather proof metal decorative plate - Google Patents

Abstract

PURPOSE:To promote design efficiency and, at the same time, to make it possible to strengthen weather-proofness by forming projected patterns on the face of a metal plate by a mastic coating material, and coating the whole face including the projected patterns with fluoropaint to integrate. CONSTITUTION:A mastic coating material is sprayed randomly on the face of a base material 2 such as a metal plate, etc., in the shape of a stucco finish to form projected patterns 3. The whole face including the projected patterns 3 is coated with fluoropaint 5 to integrate. According to the constitution, the thee dimensional appearance of the projected patterns 3 is promoted and, at the same time, weather-proofness, pollution resistance and mildew-proofing can be greatly strengthened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a highly weather-resistant metal decorative board useful for building materials such as roofing materials and exterior wall materials, in which a random convex pattern is formed on at least the decorative surface of a thin metal sheet. It is.

[Conventional technology]

Generally, embossing and ricin coating are known for creating a three-dimensional effect on the decorative surface of a metal plate.

[Problem to be solved by the invention]

However, embossing has limitations in the three-dimensional effect due to cracks in the coating film and depth, and ricin coating has the disadvantage of not being able to form large patterns and lacking in three-dimensional effect.

[Means to solve the problem]

In order to eliminate these drawbacks, the present invention makes it possible to form irregularities with a three-dimensional effect and a large pattern using mastic paint on the decorative surface of a metal plate, and further improves weather resistance, stain resistance, and mold resistance. We propose a highly weather-resistant metal decorative board that can be strengthened.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a highly weather-resistant metal decorative board (hereinafter simply referred to as a decorative board) according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram showing a part of the cross section of the above-mentioned decorative board. Reference numeral 1 is a decorative board with a convex pattern 3 provided on the surface of the base material 2 and is fixed to the entire decorative surface 4 including the convex pattern 3. This is a decorative board coated with a fluorine paint film 5 made of fluorine paint. To explain further, the base material 2 is made of one type such as a stainless steel plate, an aluminum plate, a galvanized iron plate, a colored steel plate, a flat plate such as a titanium plate, an embossed plate, etc. Preferably, a colored steel plate is used because it combines cost and weather resistance. In this case, it is desirable to have the configuration shown in FIG. 2, for example, as an example of a cross section thereof. That is, the base material 2 has a core 1A, iron (A), zinc metal, a chemical conversion coating (C), an undercoat layer (2), and a topcoat layer (E). In this case, the top coat layer E is a coating film that has good similarity and adhesion to the convex pattern 3. The convex pattern 3 is made of one or more types of raw materials such as ■synthetic resin emulsion-based multi-layer pattern composition, or ■reactive and hardening synthetic resin emulsion-based multi-layer pattern composition, and has a crater-like, stucco-like, uneven pattern, etc. It was formed. It is preferable that the composition contains a few percent of fluorine resin. The thickness and the size of the convex pattern 3 are arbitrary, but the thickness is set to about 0.5 to 3 mm, and the decorative surface 2a of the base material 2 and the convex pattern 3 are made of acrylic urethane so that the decorative surface 2a and the convex pattern 3 are easily attached. Resin or epoxy resin may also be applied.

The fluorine coating film 5 is made of, for example, acrylic resin, acrylic lacquer, acrylic urethane, ethylene oxide adduct of polyester resin and bisphenol A, straight-set polymer polyester resin, polyolefins, epoxy resin,
Consisting of one or more types of coating film, etc., containing 20 to 60 parts by weight of an acrylic resin containing 85% or more of fluoroolefin vinyl monomer copolymer and acrylic (meth)acrylate I, a pigment, and a curing agent. and about 10 to 10
The thickness is approximately 0 micron (well). In addition, the abbreviations for fluorocarbon resin include PTFIE, FEP,
PF8, EPE, PCTFIE, PVIIF,, ET
It contains about 10 to 50% of the vehicle, such as FIE and PVF. To give a specific example, (1) 80 to 40 parts by weight of a fluoroolefin-vinyl monomer copolymer with 2 to 5 carbon atoms and a molecular weight of 15.000 to 40,00;
A paint composition containing 20 to 60 parts by weight of an acrylic resin containing 85% or more of 0.0 alkyl (meth)acrylate, a pigment, and a curing agent, the main component of which is an acrylic-modified vinylidene fluoride resin, and an ultraviolet absorber. The viscosity at the time of application is about 30 to 500 CPS. Here, a color steel plate is used as a base material, and mastic paint (type 2) is randomly sprayed on the surface, the so-called decorative surface, in a stucco-like manner to a thickness of 2 mm.
A test specimen (example) completed by drying to about 0% to form a convex pattern 3, then applying fluorine paint to the entire decorative surface 4, drying, and baking if necessary, and a surface coating film of a colored steel plate. The table below compares the performance, appearance, etc. of a polyester resin prepared with a test specimen (comparative example) having the same composition.

In terms of appearance, in contrast to the examples where the unevenness was more pronounced, the appearance was less clear in the comparative example.

◎-〇-Δ -Poor However, ■ indicates 60° specular reflectance, ■ Magic ink removability, ■ Pencil hardness after baking, ■ Gohan's eyes Cellotape peeling test, 01000 hours, ■ Xanshine weather meter irradiation 3000 hours.

What has been described above is only one embodiment of the decorative board according to the present invention, and the sandwich panel shown in FIGS. 3(a) to 3(u) may also be used. Furthermore, as shown in FIGS. 4(a) to (C), a flat top surface 3 is obtained by cutting the top of the convex pattern 3.
a, and when the fluorine coating film 5 is applied thereon, due to the relationship between viscosity, shape, and surface tension, the peripheral edge 3b of the convex pattern 3 becomes a thin coating film, making it look like a sludge, or forming a parallel line on the top surface 3a. It is also possible to create a three-dimensional effect due to more diffused reflection by providing a separate line such as a mouthpiece.

In particular, the figures (b) and (C) only show the pattern on the top surface 3a of the convex pattern 3.

〔Effect of the invention〕

As described above, according to the decorative board according to the present invention, (1) a fluorine coating film can be formed on the decorative surface of the multilayer pattern.

■The exterior looks more three-dimensional. ■Despite the large unevenness, the adhesion of dust and the growth of mold can be significantly reduced due to the stain resistance, weather resistance, corrosion resistance, and gloss of the fluorine coating.

■If there is a pattern engraved or pressed on the top surface, the contrast between diffuse reflection and specular reflection will be doubled. It has the following characteristics.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an enlarged part of the highly weather-resistant metal decorative laminate according to the present invention, FIG. 2 is an explanatory diagram showing a further enlarged extraction of the above-mentioned decorative laminate, and FIG. - (u) are sectional views showing other examples of building materials using the above decorative board, and Figs. 4 (a) - (C) are explanatory views showing other examples with convex patterns. Top... Highly weather resistant metal decorative board, 2... Base material, 3...
Convex pattern, 5... Fluorine coating film. Figure 3 Ship C] Figure 3 (α)

Claims (1)

[Claims] (1) A highly weather-resistant metal decorative board characterized in that a convex pattern is provided on the decorative surface of a metal plate using mastic paint, and the entire decorative surface including the convex pattern is coated and integrated with a fluorine coating film.