JP2959045B2 - Exterior decorative material and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to an exterior decorative material having a design, and also includes a method of manufacturing the same.

[Prior art]

Exteriors of buildings and the like are often sprayed with paint, but due to demands for shortening the construction period and consideration for the environment, the dry construction method is increasingly used. For this purpose, a decorative material in which a paint is applied to an inorganic base material for exterior such as gypsum slag board has come to be used. However, this decorative material has only a monochromatic and uniform surface. This is unsatisfactory for some applications, and a decorative material with a beautiful design is required.

[Problems to be solved by the invention]

An object of the present invention is to provide an exterior decorative material having a beautiful appearance with an arbitrary pattern and a method for producing the same, in response to the above demand.

[Means for Solving the Problems]

As shown in the drawing, the exterior decorative material of the present invention comprises an exterior substrate (1) in which the surface of a plate-shaped substrate (11) is treated with a waterproof sealing material (12) made of a moisture-curable urethane paint. An intermediate layer (2) made of a synthetic resin having a smooth surface, a primer layer (3), a pattern printing layer (4), and a surface protective layer (5) made of a weather-resistant synthetic resin are sequentially provided thereon. It is preferable to provide a waterproof sealing material on the back surface of the plate-like base material and to provide the same resin layer (6) as the intermediate layer because the flatness of the product can be maintained and the waterproofness can be increased. It is more preferable to perform the same treatment on the end face, since sufficient waterproofness can be obtained. The method of the present invention for producing the above-mentioned exterior decorative material, the surface of the plate-shaped substrate is treated with a waterproof sealing material made of a moisture-curable urethane paint to prepare an exterior substrate, and on that, Apply the same or similar synthetic resin paint as the primer, dry and polish to form an intermediate layer with a smooth surface, apply the primer paint and heat it. After forming a primer layer, applying a transfer sheet to it, applying heat and pressure, peeling off the transfer board, transferring the pattern printing layer, applying a synthetic resin paint with excellent weather resistance, drying and surface protection layer To form In the formation of the intermediate layer, the application and polishing of the paint are performed twice or more as necessary. Usually, it is preferable to carry out twice, and that is sufficient. The plate-shaped substrate used in the present invention can be arbitrarily selected from those used in the production of exterior materials. Examples include gypsum board such as gypsum board and gypsum slag board, glass fiber reinforced concrete board, lightweight foam concrete board, cement board such as hollow extruded cement board, calcium silicate board, and unglazed ceramic board. As described above, a moisture-curable urethane resin is used as the waterproof sealing material. A room-temperature-curable urethane resin and an acrylic-urethane resin are preferable, and in addition, a water-based elastic coating such as an acrylic emulsion or an acrylic-vinyl acetate emulsion may be used. The synthetic resin used for the intermediate layer and the primer layer is selected in consideration of the ink vehicle of the picture printing layer. For example,
When a pattern printed with an acrylic resin-based ink is to be transferred, a mixture of an acrylic resin and a urethane resin may be used because the waterproof sealing material is a urethane resin. It is not necessary to form the intermediate layer and the primer layer with the same kind of resin, but it goes without saying that materials that strongly adhere to each other should be used. The coating means for forming these layers may be a known means such as a flow coat, a knife coat, a roll coat and the like. Drying uses hot air,
A method using far-infrared rays is optional. Polishing uses sand cloth or the like in which fine abrasive grains are adhered to cloth. The transfer for providing the pattern printing layer is performed by forming a release layer, if necessary, on a suitable transfer sheet, for example, a transfer board represented by a biaxially stretched polyethylene terephthalate film, and printing a desired pattern thereon. And may be performed according to a known technique. The synthetic resin having excellent weather resistance for forming the surface protective layer is a two-part curable resin such as a fluororesin, an acrylic resin, and an acrylic silicone resin. Adding a UV absorber to increase weather resistance is a recommended embodiment. The ultraviolet absorber may be selected from commercially available products.
The formation of the surface protective layer may be performed by the same means as described above. The coating and drying means when the synthetic resin layer is provided on the back surface or the end surface of the exterior base material are the same as described above. It is convenient in the manufacturing process to form this resin layer before the primer layer.

[Operation]

The cosmetic material for exterior of the present invention, by being treated with a waterproof sealant made of a moisture-curable urethane paint, facilitates obtaining a smooth intermediate layer while ensuring waterproofness,
The provision of the intermediate layer having a smooth surface makes it possible to provide a picture printing layer thereon. The presence of the intermediate layer further improves waterproofness. According to the production method of the present invention, an intermediate layer is formed on the waterproof sealing material, and the surface is smoothed by polishing. This effect is particularly high in a preferred embodiment in which the intermediate layer is applied twice. The first coat formation and rough surface polishing eliminates most of the irregularities on the substrate surface, but if a primer is applied directly on top of this, the remaining irregularities appear, so a second coat is formed. And finish polishing. As a result, the irregularities are reduced to such an extent that they cannot be visually recognized. The reason why the transfer is performed before the primer layer is completely dried is, of course, to strengthen the adhesion to the picture printing layer. By employing the process of the present invention, a primer layer,
There is almost no unevenness at the interface between the picture printing layer and the surface protective layer, and the respective layers are firmly adhered to each other, so that an exterior decorative material having a high waterproof property and a beautiful appearance can be obtained.

【Example】

Square with a side of 30.3cm (that is, shaku angle) and thickness 1.2c
The moisture-curable urethane resin-based waterproof sealing material "V-Seran # 100" (made by Dainippon Paint) is applied on the front, back and end surfaces of the fiber reinforced gypsum slag board of 10 m in dry weight of 10 g.
An exterior base material was prepared by applying a flow coater so as to form a square shape and drying by hot air to obtain a waterproof treatment. A surface coater “400GA” (manufactured by Dainippon Paint) containing an acrylic resin and a urethane resin was applied to both surfaces of the base material using a flow coater so that the application amount was 20 g / sharp angle, and dried with hot air. The surface of the coating on one side of the substrate was polished sequentially with wide belt sanders # 180 and # 240. A similar coating film was formed thereon again, and wide belt sanders # 240 and # 3
The surface was finished by polishing successively at 20 to provide an intermediate layer. An acrylic resin-urethane resin-based primer “CONITAN 220” (manufactured by Osaka Varnish) was flow-coated on this intermediate layer so that the coating amount was 10 g / sharp angle. Hot air of 70 ° C. was applied for 5 minutes to bring the primer layer into a half-cured state. Using a biaxially stretched polyethylene terephthalate film "Diafoil S # 25" (manufactured by Diafoil) as a transfer board,
Prepare a transfer sheet on which an extract pattern is printed with an ink using a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer as a vehicle, and overlay the transfer sheet on the half-cured primer layer,
Roll transfer was performed at a temperature of 145 ° C. and a pressure of 5 kg / cm ² , and the mount was peeled off to provide a picture printing layer. On top of that, a benzotriazone-based UV absorber "Tinuvin
Fluorine resin “L-1” containing “900” (manufactured by Ciba-Geigy)
“0 Flor” (manufactured by Osaka Varnish) was flow-coated so that the coating amount was 15 g / shaku angle, to obtain a decorative material for exterior of the present invention.

【The invention's effect】

According to the present invention, an exterior cosmetic material having a beautiful appearance and high waterproofness having an arbitrary pattern has been realized. This decorative material can be widely used for dry construction and enriches the design of the building.

[Brief description of the drawings]

The drawing is a schematic cross-sectional view for explaining a preferred embodiment of the exterior decorative material of the present invention. DESCRIPTION OF SYMBOLS 1 ... Base material for exterior 11 ... Plate-shaped base material, 12 ... Waterproof sealing material 2 ... Intermediate layer, 3 ... Primer layer 4 ... Picture printing layer, 5 ... Surface protective layer 6 ... Resin layer

Claims (4)

(57) [Claims] 1. An intermediate layer, a primer layer, and a pattern printing of a synthetic resin having a smooth surface on an exterior substrate obtained by treating the surface of a plate-shaped substrate with a waterproof sealing material made of a moisture-curable urethane paint. An exterior decorative material comprising a layer and a surface protective layer made of a weather-resistant synthetic resin in this order. 2. A moisture-curable urethane paint as a waterproof sealant, an acrylic resin paint as a primer, and a fluororesin, an acrylic resin, or an acrylic-silicone resin to which an ultraviolet absorber is added as a weather-resistant synthetic resin. The exterior decorative material according to claim 1, which is used for each. 3. The exterior decorative material according to claim 1, wherein a layer of the same synthetic resin as the intermediate layer is provided also on the back surface of the exterior substrate. 4. The surface of a plate-shaped substrate is treated with a waterproof sealing material made of a moisture-curable urethane paint to prepare an exterior substrate, on which a synthetic resin of the same kind or a close relation to the primer is formed. Apply paint, dry and polish to form an intermediate layer with a smooth surface, apply primer paint and heat to form a primer layer with no fluidity but not completely dried and transferred to it After applying a sheet and applying heat and pressure, the transfer board is peeled off, the pattern printing layer is transferred, and then a coating of a synthetic resin having excellent weather resistance is applied and dried to form a surface protective layer, which is a decorative material for exterior use. Manufacturing method.