JPH035561A - Panel for building - Google Patents

Abstract

PURPOSE:To improve durability of a panel by a method wherein a filmy paint film layer on which paint is applied thick and which can be peeled is formed on the decorative surface of a panel, and during deterioration and contamination of a paint film, the paint film is peeled and recoating is applied thereon. CONSTITUTION:Paint which protects a surface and produces a filmy state after curing is applied on a decorative surface 3 of a metallic or wood dry type panel A. A treating material layer the adhesion of which is deteriorated with a time is located between the decorative surface 3 and a paint film layer 6. When the paint film layer 6 is deteriorated and contaminated, the paint film layer is peeled, and a paint film layer is formed again. This constitution holds the decorative surface in a neat state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention forms a protective film on the decorative surface of architectural panels, especially dry-type panels, to protect the paint film on the main body and to prevent peeling when aged. This invention relates to a construction panel whose durability and stain resistance are easily improved by forming a protective film again on top of the original decorative coating.

[Conventional technology]

Conventionally, the decorative surface of this type of panel is formed by a baked paint film or room temperature drying paint film, which provides waterproofness, corrosion resistance, color addition,
The aim was to improve stain resistance.

[Problems to be Solved by the Invention] However, this type of panel usually has disadvantages such as deterioration of the coating film during construction or over time, causing discoloration, efflorescence, and severe contamination. there were. Furthermore, recently there has been a trend to wash walls, which has accelerated the deterioration of decorative coatings, which has the disadvantage of exposing rust to decorative surfaces. Moreover, when it deteriorates, it must be repainted, and it has the disadvantage that its adhesion to the base and weather resistance are significantly lower than the initial decorative coating.

[Means to solve the problem]

In order to eliminate such drawbacks, the present invention forms a coating film on the decorative surface of at least architectural panels (hereinafter simply referred to as panels) that can be peeled off after 1 to 3 years, thereby enhancing weather resistance and stain resistance. This project proposes a panel with less damage that delays color fastness.

〔Example〕

EMBODIMENT OF THE INVENTION Below, the panel based on this invention is demonstrated in detail using drawing. FIG. 1 is a representative example of the above-mentioned panel A, which has a sandwich structure consisting of a top surface material, a core material 7, and a back surface material 8. To explain further, the surface material is a plate material having male and female connecting portions 4.5 and a decorative surface portion 3, and its materials include, for example, Al, Fe, Cu, stainless steel, aluminum/zinc alloy plated steel sheet, and colored steel sheet. , enameled steel sheet, fluororesin coated steel sheet, clad steel sheet, sandwich steel sheet, etc., are formed by press molding, extrusion molding, roll forming, etc. Panel A shown in Fig. 1 has a decorative surface part 3, a male type connection A portion 4 and a female connecting portion 5 are formed. More specifically, a peelable film layer 6 is provided on the surface material, for example, in the case of a colored steel sheet, a peelable film layer 6 is provided on a base 2 including a galvanized steel sheet, a chemical conversion coating, an undercoat, and a topcoat. That is, the coating layer 6 is prepared by cleaning the surface of the base 2, applying the coating layer 6 in liquid form to this without being affected by the shape of the base 2, and then gradually hardening until the final film thickness is 5 to 5. It has a diameter of about 1000 microns and can be peeled off in the form of a film. Raw materials include water-based paints in which acrylic monomers are graft-polymerized onto an epoxy resin skeleton, vinyl acetate-based paints, water-based saturated polyesters, alkyd paints, acrylic polymers, vinylidene fluoride-hexafluoropropene-based paints,
Acrylic lacquer, melamine, polystyrene, ABS
, vinyl chloride, melamine, polypropylene, cellulose acetate, ethylene, propylene, diene rubber, cellulose acetate, etc. Incidentally, between the decorative surface portion 3 and the coating layer 6, there is interposed a seek material layer or a treatment material layer whose adhesiveness deteriorates over time due to a suitable viscosity. The core material 7 is made of synthetic resin foam such as polyisocyanurate foam, phenol foam, polyurea foam, polyimide foam, etc., and flame retardants (borates, borates, etc.) are added to these synthetic resin foams.
silicates, phosphates, etc.), flame retardant aids (gypsum slag, talc, shirasu balloons, etc.), aggregates (perlite, glass peas, etc.), fibrous materials (long and short fibers), etc., in coarse or dense form. Mixed products, products made by coating pearlite with phenol foam powder and foaming it by heating and pressurizing it, gypsum board, rock wool board, glass wool board, ALC.

It is made of a single material, such as insulation board, wood chip board, glass wool, etc., or a combination of multiple materials. The backing material 8 is made of one type of kraft paper, aluminum kraft paper, noncombustible paper, etc., and contributes to preventing the core material 7 from leaking to the outside from the surface material and increasing the strength.

Next, the manufacturing method will be briefly explained. First, the base 2 (approximately 20 microns of unsaturated polyester baked on) of the decorative panel (0.8 m deep, embossed surface with a random pattern) formed on the panel as shown in Figure 1 was washed, and this surface was coated with acrylic and vinegar. Apply vinyl-based paint (water-based) with a viscosity of 300CP/20°C to the entire surface with a spray gun or brush, and then heat to 50°C.
The sample was passed through a curing oven for 1 minute to achieve apparent curing. Of course, even if it is dried and cured at room temperature, it can be produced satisfactorily as long as the work efficiency is not considered. The thickness of this coating layer 6 was 0.5 mm+. Note that the color of the base 2 was somewhat less vivid due to concealment. This panel A had no damage to the decorative surface portion 3 during delivery, and in particular, none of the panels broke through the base 2 to reach the galvanized layer. Further, after 1000 hours of accelerated weather resistance test (JIS-K-5400), the gloss decreased to 60% and the stain was severe, so an attempt was made to peel off the coating layer 6. At this time, the coating layer 6 became a film and could be peeled off. Therefore, the base 2 was intact and the decorative surface part 3 was as good as new without fading. Of course, this decorative surface part 3 is washed again, another paint is applied, and it is hardened to form a new decorative surface part 3.

[Other Examples]

What has been described above is only one embodiment of the panel according to the present invention, and the coating layer 6 can be formed as shown in FIGS. 3(a) to 3(C). That is, Figure (a) shows a panel A formed by alternately arranging and applying various coating layers 6 on two base surfaces.
, (b) shows panel A in which the base 2 is embossed and a coating layer 6 is formed in the recesses 2a,
) This is a panel A having a decorative surface portion 3 in which a transparent film 9 made of fluororesin, polyethylene resin, acrylic resin, etc. is adhered and integrated with a base 2 shown in the figure. Further, as other embodiments of the shape of the panel A, it can be formed into shapes such as those shown in FIGS. 4(a) to (n) and FIGS. 5(a) to (■).

〔Effect of the invention〕

As mentioned above, according to the construction panel according to the present invention, ■
The base of the decorative surface (initial coating film) is protected for a long time. ■No damage to the paint film during construction. - Even if the decorative surface is uneven, it is easy to form a coating layer that can be peeled off. ■A new decorative surface can be created by applying paints of different hues to the decorative surface and applying the paint with a brush. (2) By interposing a thin layer between the decorative surface and the coating layer that deteriorates over time, for example due to the transmission of ultraviolet rays, any resin coating can be peeled off after several years in the form of a film. ■It is possible to prevent rust at the ends of wood ends, etc. It has the following characteristics and effects.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the construction panel according to the present invention, Fig. 2 is an enlarged view showing a part thereof, and Figs. 3(a) to 3).
(C) is an explanatory diagram showing other embodiments of the decorative surface part, the fourth
Figures (a) to (n), Figures 5 (a) to (■ are explanatory diagrams showing other examples. Work...surface material, 2...base material, 3...part, 7... ...Core material, 8...Back surface material. - Decorative surface Figure 1, Figure B... Surface material 2... Base material 6... Coating film layer 7... Core material 8... Back surface material + Figure (0, n (C) td No. S Figure Figure (η)

Claims (1)

[Claims] (1) An architectural panel characterized in that a paint is thickly applied to at least a decorative surface of metal or wood, cured and formed into a film, and then a removable paint layer is provided.