JP2018144359A - Decorative plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart design rich in variation to an inorganic basic material.SOLUTION: A decorative plate 9 is provided in which a primer layer 3, a pattern layer 2 and a top coat layer 1 are formed in this order on an inorganic basic material 7. In the primer layer 3, titanium oxide is preferably blended with a resin such as a nylon resin, an alkyd resin, an alkyd resin, an epoxy resin, an urethane resin and alkyl silicate in order to improve concealability. In the pattern layer 2, desired pattern and hue are formed by gravure printing, flexographic printing, screen printing, inkjet printing and a decorative film, the top coat layer 1 is formed of a coating material, an organopolysiloxane-based resin coating material and a fluorine resin coating material are used as the coating material, a fiber-reinforced cement plate is preferable as the inorganic basic material 7, and the decorative plate preferably has a thickness of 3-100 mm and a density of 0.5-2.0 g/cm3 in terms of strength and handleability.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative board.

  Conventionally, interior materials based on inorganic boards such as gypsum board, calcium silicate board, and fiber reinforced cement board are known. Among them, the extrusion-molded cement board is a panel that is extruded into a hollow plate shape from cement, calcium silicate, and inorganic fibers. Although it is lightweight, it is a building material that is excellent in strength, weather resistance, fire resistance, and earthquake resistance, and has both aesthetics and design.

JP 2000-43185 A JP 2012-213857 A

  The fiber-reinforced cement board is generally flat in shape, but a rib shape or an embossed pattern can be applied to the surface by processing a die at the time of extrusion. In addition, it is common to impart design properties to the surface of an extrusion-molded cement board, but most of them are monochromatic.

  On the other hand, a non-residential outer wall can be imparted with high designability by, for example, stretching natural stone on a fiber-reinforced cement board, but there are problems in that it takes time and cost for construction.

  The present invention has been studied in view of such a situation, and the above-described problems can be solved by sequentially forming a primer layer, a picture layer, and a top coat layer on an inorganic base material.

  The surface of the inorganic board, which has been monochromatic coating so far, can be given a design such as stone or wood, resulting in a rich finish. Furthermore, it saves time and labor compared to placing natural stones, which can lead to cost reduction.

The structure sectional view of the decorative board of the present invention. The structure sectional drawing of the conventional cosmetics.

Hereinafter, the present invention will be described in detail.
Examples of the inorganic base material related to the present invention include cement board, fiber reinforced cement board, volcanic glassy multilayer board, calcium silicate board, magnesium silicate board, and the like. The finished cosmetic material with abundant colors and patterns on the surface looks great and has excellent strength.

  Among these, a fiber reinforced cement board excellent in strength, impact resistance and dimensional stability is preferable. This fiber-reinforced cement board can be obtained by using cement as a matrix, blending reinforcing fibers, silica powder, and pigment, kneading by adding water, extrusion molding, and then curing in an autoclave.

  The cement is not particularly limited, and examples thereof include ordinary portland cement, blast furnace cement, silica cement, mixed cement such as fly ash cement, and alumina cement.

  Examples of the reinforcing fibers include inorganic fibers such as glass fibers, carbon fibers, and wollastonite, natural organic fibers such as pulp fibers, and organic synthetic fibers such as polyethylene fibers, polypropylene fibers, vinylidene fibers, and aramid fibers.

  The silica component of the fine silica powder becomes calcium silicate crystalline by hydrothermal reaction with the calcium component in the cement during autoclave curing and improves the strength.

  Extrusion molding is performed using, for example, a screw type extruder. When the autoclave curing conditions are 110 to 200 ° C. and a holding time of 1 to 24 hours, a lightweight and high-strength fiber reinforced cement board is obtained.

  The thickness of the inorganic base material is preferably 3 mm to 100 mm in view of strength and ease of handling. The density is preferably 0.5 to 2.0 g / cm 3. If the density is less than the lower limit, the underlayer is easily sucked, and if the density exceeds the upper limit, it becomes heavier and tends to be inferior in handleability.

  The inorganic base material is subjected to surface grinding by sandblasting, shot blasting, diamond roll, sandpaper, etc., and then a primer layer is provided for improving the smoothness of the base material surface and preventing alkaline component elution. For the primer layer, nylon resin, alkyd resin, epoxy resin, acrylic resin, acrylic modified silicone resin, chlorinated rubber resin, urethane resin, phenol resin, polyester resin and melamine resin, alkyl silicate or hydrolysis condensate thereof can be adopted. In order to improve the concealing property, titanium oxide may be blended.

  The primer coating amount may be about 10 to 100 g / m 2 in terms of solid content, and is performed by a known roll coater, flow coater, spray coating or the like. If the coating amount is less than the lower limit, the adhesion with the pattern layer tends to be inferior, and if the amount exceeds the upper limit, the foamed product tends to foam and the finished product tends to be inferior in appearance.

  A pattern layer is provided on the primer layer. The pattern layer can form a desired pattern and color tone by gravure printing, flexographic printing, screen printing, inkjet printing, decorative film, and the like. When a decorative film is employed, high weather resistance can be imparted to the pattern layer. Adopting ink jet printing suitable for small-volume production is economical because there is little wasted ink. The decorative film is provided with a printing layer on a plastic film and an adhesive layer on the front and back of the printing layer, and the printing layer is transferred by pressing. When there is no adhesive layer, an adhesive is applied on the primer layer. The decorative film is not limited to the one in which the adhesive layer and the printing layer are integrally laminated, and for example, the decorative film is laminated in the order of the adhesive layer and the printing layer on the primer layer. It doesn't matter.

  Examples of the material of the plastic film include polyethylene terephthalate (PET), polyvinyl chloride film, acrylic, polyolefin, polyester, polyvinylidene chloride, polystyrene, polycarbonate, polyvinyl alcohol, and polyamide.

A top coat layer made of a paint is formed on the pattern layer for the purpose of improving chemical resistance. Paints include organopolysiloxane resin paint, fluororesin paint, two-part curable acrylic urethane resin paint, acrylic resin paint, epoxy resin paint, polyurethane resin paint, vinyl chloride resin paint, vinylidene chloride resin paint, acrylic silicone resin paint These are selected as appropriate in consideration of the coating film drying property, coating film surface hardness, chemical resistance and contamination resistance of the coating film. The coating is applied by a roll coater, flow coater, spray coating or the like.
Hereinafter, examples and comparative examples will be described in detail.

Fiber Reinforced Cement Board Mess (registered trademark) MHN-6060A (manufactured by Aikatec Building Materials Co., Ltd., thickness 60 mm) was prepared as an extruded cement board.

Primer main agent # 130 Primer II (AGC Co-Tech Co., Ltd., epoxy resin type)
Curing agent # 130 Primer II (AGC Co-Tech, Amine)
An epoxy primer was obtained by blending the main agent: curing agent in a ratio of 4: 1.

Picture layer A film made of PET (polyethylene terephthalate) as a base material, a picture layer printed with a stone pattern by ink, and a pattern decorative film with an acrylic resin adhesive layer on both sides of the picture layer ( Dai Nippon Printing Co., Ltd.) was prepared.

Top coat (A)
Main agent: Super inorganic guard Z # 100 clear matte (Kikusui Chemical Co., Ltd., component: modified organopolysiloxane)
Curing agent: Super inorganic guard Z # 100 clear matte (Kikusui Chemical Co., Ltd., component: epoxy-modified silane compound)
The mixture was mixed at a ratio of main agent: curing agent of 30: 1 to obtain an organopolysiloxane-modified paint.

Manufacture of decorative board The surface of the fiber reinforced cement board is ground with a diamond roll or sandpaper, the primer is applied by spraying so that the coating amount is 60 g / m 2 in solid content, dried at 100 ° C. for 10 minutes, and then 150 ° C. For 10 minutes.
Next, a decorative film was placed on the primer layer and pressed, and the PET film was peeled off to transfer the pattern layer.
Next, the top coat (A) was applied onto the pattern layer by spraying so that the coating amount was 33 g / m 2 in solid content, and dried at 100 ° C. for 20 minutes to obtain a decorative board.

Top coat (B)
Bonflon aqueous SR last coat II (manufactured by AGC Co-Tech Co., Ltd., component: fluororesin) fluororesin-based paint was prepared.

Manufacture of a decorative board In Example 1, it implemented similarly except having used the topcoat (B) instead of the topcoat (A).

Comparative Example 1
In Example 1, it implemented similarly except not having apply | coated the primer.

Comparative Example 2
In Example 2, it implemented similarly except not having apply | coated the primer.

Comparative Example 3
In Example 1, it implemented similarly except not using the pattern printing film.

Comparative Example 4
In Example 2, it implemented similarly except not using the pattern printing film.

Comparative Example 5
In Example 1, it implemented similarly except not having apply | coated topcoat (A).

Comparative Example 6
In Example 2, it implemented similarly except not having apply | coated topcoat (B).

The evaluation results are shown in Table 1.

The test method and evaluation method were as follows.

Appearance: Visual confirmation. The appearance of abnormal appearance such as cracks and blisters was marked with ◯, and with blisters marked with ×.

Adhesion: evaluated by cross-cut tape peeling (based on JIS 5400 cross-cut test). 25/25 was evaluated as ◯, and 24/25 or less as X.

Acid resistance: 0.1 ml of 5% hydrochloric acid aqueous solution was dropped, and after standing for 24 hours, the appearance was confirmed.

Alkali resistance: 0.1 ml of a saturated calcium carbonate aqueous solution was dropped, and after standing for 24 hours, the appearance was confirmed.

DESCRIPTION OF SYMBOLS 1 Topcoat layer 2 Picture layer 3 Primer layer 7 Inorganic base material 9 Decorative plate 20 Cosmetic material

Claims (3)

  A decorative board, wherein a primer layer, a pattern layer, and a topcoat layer are sequentially formed on an inorganic base material.   The decorative board according to claim 1, wherein the pattern layer is made of a decorative film.   The decorative board according to claim 1, wherein the inorganic base material is a fiber-reinforced cement board.