JP7202215B2 - veneer - Google Patents

Description

The present invention relates to decorative laminates.

Interior materials (decorative boards) based on inorganic boards such as gypsum boards, calcium silicate boards, fiber-reinforced cement boards, etc. are conventionally known. An extruded cement board is a panel made of cement, calcium silicate, and inorganic fiber and extruded into a hollow board shape. The extruded cement board is a building material that is lightweight, yet has excellent strength, weather resistance, fire resistance, and earthquake resistance, as well as aesthetic appearance and design. The extruded cement plate is not limited to a flat shape, and has a high degree of freedom in design, such as a rib shape or an embossed pattern on the surface depending on the shape of the nozzle used when extruding.

JP-A-2000-43185

However, in order to impart a design to the conventional extruded cement board, it has been common practice to apply a single-color coating to the surface thereof.

Therefore, there arises a technical problem to be solved, which is to provide a decorative board with a high degree of designability, and an object of the present invention is to solve this problem.

In order to achieve the above object, the decorative board according to the present invention comprises an extruded cement board having a smooth surface formed of a fiber-reinforced cement board, and a primer layer, a base layer and a pearl layer in this order from the bottom. The amount of pearl added to the pearl layer is set to 0.5 to 1.0% by weight .

According to this configuration, since the decorative board is provided with the pearl layer in which an appropriate amount of pearl is blended, it is possible to give the decorative board a lustrous feeling peculiar to pearls.

Further, in the decorative sheet according to the present invention, it is preferable that a topcoat layer is laminated on the pearl layer.

According to this configuration, by laminating the topcoat layer on the pearl layer, it is possible to impart a sense of depth and gloss to the decorative board.

It is possible to give the surface of an inorganic board, which has only been painted in a single color, a design with a pearl-specific luster.

FIG. 2 is a cross-sectional view of the configuration of the decorative board of the present invention.

An embodiment of the present invention will be described based on the drawings. In addition, hereinafter, when referring to the number, numerical value, amount, range, etc. of the constituent elements, unless otherwise specified or clearly limited to a specific number in principle, it is limited to the specific number It does not matter if the number is greater than or less than a certain number.

In addition, when referring to the shape or positional relationship of components, etc., unless otherwise specified or in principle clearly considered otherwise, etc. include.

In addition, the drawings may exaggerate characteristic parts by enlarging them in order to make the characteristics easier to understand. In addition, in cross-sectional views, hatching of some components may be omitted in order to facilitate understanding of the cross-sectional structure of the components.

A decorative sheet 1 according to the present invention comprises a primer layer 3 , a base layer 4 and a pearl layer 5 laminated on an inorganic base material 2 .

Examples of materials for the inorganic base material 2 include a cement board, a fiber-reinforced cement board, a volcanic vitreous double layer board, a calcium silicate board, a magnesium silicate board, etc. These base materials have high flame retardancy and strength. Excellent for

In particular, as the material for the inorganic base material 2, a fiber-reinforced cement board is preferable because it is excellent in strength, impact resistance, and dimensional stability. A fiber-reinforced cement board can be obtained by using cement as a matrix, blending reinforcing fibers, silica powder, and pigments, adding water and kneading the mixture, extruding the mixture, and then curing it in an autoclave.

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

Examples of 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 a calcium-silicate-based crystalline substance through a hydrothermal reaction with the calcium component in the cement during autoclave curing, thereby improving the strength.

The inorganic base material 2 is extruded using, for example, a screw extruder. If the autoclave curing conditions are 110 to 200° C. and the holding time is 1 to 24 hours, a lightweight and high-strength fiber-reinforced cement board can be obtained.

The thickness of the inorganic base material 2 is preferably 50 mm to 100 mm in terms of strength and ease of handling. Further, the density of the inorganic base material 2 is preferably 0.5 to 2.0 g/cm3. If the density is less than the lower limit, the primer layer 2 is likely to be absorbed, and if it exceeds the upper limit, it becomes heavy and the handleability tends to deteriorate.

The surface of the inorganic base material 2 is ground smooth by sandblasting, shot blasting, diamond roll, sandpaper, or the like.

The primer layer 3 laminated on the inorganic base material 2 prevents the alkaline component of the inorganic base material 2 from eluting. The primer layer 3 is formed by applying a primer paint onto the inorganic base material 2 .

Nylon resins, alkyd resins, epoxy resins, acrylic resins, acrylic-modified silicone resins, chlorinated rubber resins, urethane resins, phenol resins, polyester resins and melamine resins, alkyl silicates or their hydrolyzed condensates, etc. can be used as primer paints. be. In addition, titanium oxide may be blended in the primer coating in order to improve hiding power.

The coating amount of the primer paint may be about 10 to 100 μm in film thickness, and is carried out by a known roll coater, flow coater, spray coating, or the like. If the coating amount is less than the lower limit, adhesion to the underlying layer 4 tends to be poor, and if the coating amount exceeds the upper limit, foaming is likely to occur, and the appearance of the finished product tends to be poor.

An underlying layer 4 is laminated on the primer layer 3 . The base layer 4 is formed by applying a toned base paint onto the primer layer 3 .

Base paints include organopolysiloxane resin paints, fluorine resin paints, two-component curing acrylic urethane resin paints, acrylic resin paints, epoxy resin paints, polyurethane resin paints, vinyl chloride resin paints, vinylidene chloride resin paints, and acrylic silicone resin paints. and the like, and are appropriately selected in consideration of the drying property of the coating film, the surface hardness of the coating film, the adhesion to the primer layer 3, and the chemical resistance and contamination resistance of the coating film.

The coating amount of the base coating material may be about 10 to 100 μm in film thickness, and the coating is performed by a known roll coater, flow coater, spray coating, or the like. If the coating amount is less than the lower limit, adhesion to the primer layer 3 tends to be poor, and if the coating amount exceeds the upper limit, foaming is likely to occur, and the appearance of the finished product tends to be poor.

A pearl layer 5 is laminated on the base layer 4 . The pearl layer 5 is formed by coating the base layer 4 with a pearl paint containing an appropriate amount of pearl powder.

Pearl paints include organopolysiloxane resin paints, fluorine resin paints, two-component curing acrylic urethane resin paints, acrylic resin paints, epoxy resin paints, polyurethane resin paints, vinyl chloride resin paints, vinylidene chloride resin paints, and acrylic silicone resin paints. and the like, and are appropriately selected in consideration of the drying property of the coating film, the surface hardness of the coating film, the adhesion to the base layer 4, the chemical resistance and stain resistance of the coating film, and the degree of dispersion of pearls.

The coating amount of the pearl paint may be about 10 to 100 μm in film thickness, and the coating is performed by a known roll coater, flow coater, spray coating, or the like. If the coating amount is less than the lower limit, adhesion to the underlying layer 4 tends to be poor, and if the coating amount exceeds the upper limit, foaming is likely to occur, and the appearance of the finished product tends to be poor.

The amount of pearl powder to be added can be arbitrarily adjusted within a range in which the pearl layer 5 can obtain a lustrous feeling peculiar to pearl and the pearl does not settle in the pearl layer 5 . Since the pearl layer 5 is translucent, the coloring of the decorative board 1 can be adjusted according to the color tone of the base layer 4 .

A topcoat layer 6 is preferably laminated on the pearl layer 5 for the purpose of improving the chemical resistance of the decorative board 1 . Further, by laminating the topcoat layer 6, the pearl layer 5 can be given a sense of depth. The topcoat layer 6 is formed by applying a topcoat paint on the pearl layer 5 .

Topcoat paints include organopolysiloxane resin paints, fluorine resin paints, two-component curing acrylic urethane resin paints, acrylic resin paints, epoxy resin paints, polyurethane resin paints, vinyl chloride resin paints, vinylidene chloride resin paints, and acrylic silicone resin paints. and the like, and are appropriately selected in consideration of the drying property of the coating film, the surface hardness of the coating film, the adhesion to the pearl layer 5, and the chemical resistance and contamination resistance of the coating film.

The coating amount of the top coating may be about 10 to 100 μm in film thickness, and the coating is performed by a known roll coater, flow coater, spray coating, or the like. If the coating amount is less than the lower limit, adhesion to the pearl layer 5 tends to be poor, and if the coating amount exceeds the upper limit, foaming is likely to occur, and the appearance of the finished product tends to be poor.

Next, a detailed description will be given with reference to examples and comparative examples according to the present invention.

[Example 1]
The decorative board 1 according to Example 1 is constructed by the following procedure.
[Inorganic base material (fiber reinforced cement board)]
Mace (registered trademark) MHN-6060A (manufactured by Aika Tech Kenzai Co., Ltd., thickness 60 mm) is prepared as an extruded cement board.

[Primer layer]
The surface of the inorganic base material 2 is ground with a dial roll and sandpaper, and a primer coating is applied to the inorganic base material 2 by spraying so that the thickness of the primer layer 3 is 30 to 40 μm. Dried for 20 minutes.
・ Main agent: #130 Primer III (manufactured by AGC Coatec Co., Ltd., epoxy resin type)
・ Curing agent: #130 primer III (manufactured by AGC Coatec Co., Ltd., amine type)
・Mixing ratio: main agent: curing agent = 4:1

[Underlayer]
After coating the primer layer 3 with a spray so that the film thickness of the underlayer 4 was 30 to 40 μm, the undercoat was dried at 150° C. for 20 minutes.
・ Main agent: Bonflon GT5200 main agent (manufactured by AGC Coatec Co., Ltd., fluorine resin)
Curing agent: Bonflon GT5200 curing agent (manufactured by AGC Coatec Co., Ltd., isocyanate type)
・Mixing ratio: main agent: curing agent = 13:1

[Pearl layer]
A pearl paint was applied onto the base layer 4 by spraying so that the pearl layer 5 had a film thickness of 30 to 40 μm, and then dried at 150° C. for 20 minutes.
・Main agent: Bonflon 5200 Pearl A (manufactured by AGC Coatec Co., Ltd., fluorine resin), Pearl addition amount 1.0%
Curing agent: Bonflon 5200 Pearl A curing agent (manufactured by AGC Coatec Co., Ltd., isocyanate type)
・Mixing ratio: main agent: curing agent = 13:1

[Example 2]
The decorative board 1 according to Example 2 was obtained by laminating the following topcoat layer 6 on the pearl layer 5 of Example 1, and was carried out in the same manner as in Example 1 except for this.

[Topcoat layer]
After coating the pearl layer 5 with a top coat paint by spraying so that the thickness of the top coat layer 6 is 30 to 40 μm, it is dried at 150° C. for 20 minutes.
・ Main agent: Bonflon 5200 clear main agent (manufactured by AGC Coatec Co., Ltd., fluorine resin)
・ Curing agent: Bonflon 5200 clear curing agent (manufactured by AGC Coatec Co., Ltd., isocyanate type)
・Mixing ratio: main agent: curing agent = 13:1

[Example 3]
The decorative laminate 1 according to Example 3 was prepared in the same manner as in Example 1 except that the amount of pearl added in Example 1 was set to 0.5%.

[Example 4]
The decorative board 1 according to Example 4 was obtained by laminating the topcoat layer 6 similar to that of Example 2 on the pearl layer 5 of Example 3, and was carried out in the same manner as in Example 3 except for this.

[Example 5]
The decorative laminate 1 according to Example 5 was prepared in the same manner as in Example 1 except that the amount of pearl added in Example 1 was set to 10%.

[Example 6]
The decorative board 1 according to Example 6 was obtained by laminating the topcoat layer 6 similar to that of Example 2 on the pearl layer 5 of Example 5, and was carried out in the same manner as in Example 5 except for this.

Comparative Examples 1 to 6 below were prepared as objects for comparison with Examples 1 to 6.

[Comparative Example 1]
Comparative Example 1 was carried out in the same manner as in Example 1 except that the primer layer 3 of Example 1 was omitted.

[Comparative Example 2]
Comparative Example 2 was carried out in the same manner as in Example 2 except that the primer layer 3 of Example 2 was omitted.

[Comparative Example 3]
Comparative Example 3 was carried out in the same manner as in Example 1 except that the amount of pearl added in Example 1 was set to 0.2%.

[Comparative Example 4]
Comparative Example 4 was carried out in the same manner as in Example 2 except that the amount of pearl added in Example 2 was set to 0.2%.

[Comparative Example 5]
Comparative Example 5 was carried out in the same manner as in Example 1 except that the amount of pearl added in Example 1 was set to 15%.

[Comparative Example 6]
In Comparative Example 6, the amount of pearl added in Example 2 was set to 15%.

Table 1 shows the evaluation results of Examples 1 to 6 and Comparative Examples 1 to 6.

The test methods and evaluation methods for Examples 1 to 6 and Comparative Examples 1 to 6 are as follows.

[Appearance test]
It was visually confirmed whether there was any appearance abnormality such as cracks or blisters.
[Adhesion test]
A cross-cut method conforming to JIS K5600-5-4 was used. If peeling did not occur in 25 squares with an interval of 4 mm, it was evaluated as ◯, and if peeling occurred, it was evaluated as ×.

According to Table 1, for Examples 1 to 6, no abnormality was found in the appearance test and adhesion test. On the other hand, it can be seen from Comparative Examples 3 to 6 that there is a preferable range for the amount of pearl added in terms of quality. Specifically, in the components of the pearl layer described above, when the amount of pearl added is reduced to 0.2%, the luster peculiar to pearl becomes poor, while when the amount of pearl added is increased to 15%, excessive glossiness is obtained in the pearl layer. Pearl sedimentation causes painting defects.

DESCRIPTION OF SYMBOLS 1... Decorative board 2... Inorganic base material 3... Primer layer 4... Base layer 5... Pearl layer 6... Topcoat layer

Claims (2)

A primer layer, a base layer and a pearl layer are laminated in this order from the bottom on an extruded cement board made of a fiber-reinforced cement board having a smooth surface,
The decorative board, wherein the amount of pearl added to the pearl layer is set to 0.5 to 1.0% by weight . 2. The decorative board according to claim 1, wherein a topcoat layer is laminated on said pearl layer.

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