JPH10119174A - Inorganic decorative laminated sheet having excellent anti-fouling property and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inorganic decorative laminated sheet having an excellent anti-fouling property, having very little possibility of generating peel-off even if it is used in the kitchen area including a sink and a gas range, a heat resistance and a flame resistance, capable of eliminating adhered fouling only by wiping with dry cloth, having an excellent surface mirror property as to the appearance design. SOLUTION: In an inorganic decorative laminated sheet having excellent anti-fouling property, comprising a base coat layer 3, a pattern printing layer 4, and a top coat layer 5successively laminated on the upper surface of an inorganic substrate 2, the pattern printing layer 4 is formed by a transfer method, and the top coat layer 5 is formed by coating an ionizing radiation hardening resin containing a fluorine additive so as to cover the film having an ionizing radiation permeability and irradiating an ionizing radiation ray.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior decorative board having excellent antifouling properties, which is used around a kitchen such as a sink or a gas stove, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as an inorganic decorative board used around a kitchen such as a sink and a gas stove, for example, a pattern is formed on an inorganic base material such as a calcium silicate board, an asbestos slate board and a cement slate board. After providing a pattern pattern layer by a method of pasting decorative paper, a method of directly printing a pattern pattern on an inorganic base material, or a method of transferring a pattern pattern to an inorganic base material surface using a transfer sheet, It is known that a transparent paint is applied from the top of the pattern layer to form a top coat layer, but when used around a kitchen such as a sink or a gas stove, seasoning of oil smoke, or soy sauce, sauce, curry, etc. There is a drawback that the material is scattered and adheres to the surrounding wall surface and is easily stained, and the attached stain is difficult to remove.

In order to solve the above-mentioned drawbacks, after a pattern is provided on the surface of an inorganic base material by a method of transferring the pattern, etc., an ionizing radiation-curable resin is used as a transparent coating for the top coat layer. They are used as those having excellent surface properties such as surface hardness, abrasion resistance and scratch resistance.
However, those using an ionizing radiation-curable resin as the top coat layer can remove most of the dirt when a wet cloth or detergent is used for removing dirt, but the dirt can be removed by dry wiping which is the simplest wiping method. However, in terms of external design, it is difficult to mirror-finish the surface, and defects such as fine foreign matter and air bubbles are conspicuous, resulting in poor product yield and an increase in cost.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to be used even around kitchens such as sinks and gas stoves.
Extremely little peeling, heat resistance, fire resistance,
We provide an inorganic veneer with excellent antifouling properties that can easily remove dirt attached by dry wiping, and have an excellent surface design with excellent surface specularity, and a good yield of inorganic veneers with excellent antifouling properties. An object of the present invention is to provide a method for producing an inorganic decorative board excellent in antifouling properties, which can be easily produced.

[0005]

Means for Solving the Problems To achieve the above object, a solution of the present invention is to provide an inorganic decorative board in which a base coat layer, a pattern print layer and a top coat layer are sequentially laminated on the top surface of an inorganic base material. Wherein the top coat layer is formed of an ionizing radiation curable resin mixed with a fluorine-based additive. With this configuration, the fluorine-based additive migrates to the surface of the ionizing radiation-curable resin layer and modifies the surface layer, so that the stain resistance of the decorative board surface can be further improved and can be easily wiped dry. It is possible to wipe off dirt. In addition, a fine pattern printing layer can be formed on the surface of the inorganic base material without using decorative paper, and there is no decrease in adhesion even when used around a water flow such as a sink, and even when used around a gas stove, it is heat resistant. Can be used as a decorative board without concern about heat resistance and fire resistance.

[0006] In the transfer sheet having the pattern printing layer provided with the pattern printing layer formed on one surface of the transfer sheet substrate, the surface having the pattern printing layer is in contact with the base coat layer surface of the inorganic base material. The transfer sheet is formed by peeling off the transfer base sheet of the transfer sheet after the transfer sheet is placed and heated and pressed. This makes it possible to easily form a fine pattern printing layer on the surface of the inorganic base material without using decorative paper.

A step of preparing a transfer sheet in which a pattern printing layer is laminated on one surface of the transfer sheet substrate; a step of coating a base coat layer on the upper surface of the inorganic base material; A step of placing the base sheet layer on the inorganic base material so as to be in contact with the base coat layer and heating and pressing the same; a step of forming a pattern print layer on the upper surface of the inorganic base material by peeling off the transfer sheet base material of the transfer sheet; A step of applying an ionizing radiation-curable resin mixed with a fluorine-based additive to the surface of the printing layer, and covering an ionizing radiation-transmitting film on the upper surface of the ionizing radiation-curable resin; A step of irradiating the film with ionizing radiation from the film, and a step of forming a top coat layer by peeling off the film having ionizing radiation transparency. The by excellent manufacturing method for the inorganic-based veneer, no deposition of foreign matters, in which it antifouling excellent in inorganic-based decorative plate is easily and reliably manufactured with a surface of the mirror-finished.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a laminated sectional view showing an embodiment of an inorganic decorative board of the present invention, FIG. 2 is a laminated sectional view for explaining an example of a method of manufacturing the inorganic decorative board of the present invention, and 1 is an inorganic decorative board. 2 is an inorganic base material, 3 is a base coat layer, 3a is a sealer layer, 3b is a primer layer, 4 is a picture printing layer, 4a is a solid ink layer, 4b is a picture ink layer, 5 is a top coat layer, 6 is a transfer sheet, Reference numeral 7 denotes a transfer sheet substrate, 8 denotes a film having ionizing radiation permeability, and R denotes ionizing radiation.

As shown in FIG. 1, the inorganic decorative board 1 of the present invention has a pattern printing layer 4 and a fluorine-based additive mixed through a base coat layer 3 provided on the surface of an inorganic base material 2. It has a configuration in which a top coat layer 5 formed of an ionizing radiation curable resin is laminated. The pattern printing layer 4 is composed of a solid ink layer 4a and a pattern ink layer 4b,
Ionizing radiation formed on the surface of the base coat layer 3 composed of the sealer layer 3a and the primer layer 3b provided on the upper surface of the inorganic base material 2 by a transfer method, and further mixed with a fluorine-based additive on the upper surface of the pattern print layer 4 It is characterized in that a curable resin is applied, a film having an ionizing radiation transmitting property is covered thereon, and an ionizing radiation is irradiated from above, and a top coat layer 5 having excellent antifouling property is provided by curing. I do.

Next, an example of a method for producing the inorganic decorative board 1 of the present invention will be described with reference to the drawings. First, FIG.
As shown in (a), a pattern printing layer 4 composed of a pattern ink layer 4b and a solid ink layer 4a is formed on the surface of the polyolefin resin layer 7b of the transfer sheet substrate 7 having the polyolefin resin layer 7b provided on the surface of the thin paper 7a. The transfer sheet 6 provided is prepared. Next, as shown in FIG. 2B, a base coat layer 3 composed of a sealer layer 3a and a primer layer 3b was provided on the upper surface of the inorganic base material 2. Next, as shown in FIG. 2C, the pattern printing layer 4 of the transfer sheet 6 is overlapped with the base coat layer 3 provided on the surface of the inorganic base material 2 so as to face the transfer sheet base material. Heat and pressurize from the surface of No. 7. Next, as shown in FIG. 2D, the transfer sheet base material 7 of the transfer sheet 6 is peeled off, and the pattern printing layer 4 is provided on the base coat layer 3 surface of the inorganic base material 2. Next, as shown in FIG. 2 (e), an ionizing radiation curable resin 5 mixed with a fluorine-based additive is applied on the upper surface of the inorganic base material 2 including the picture printing layer 4, and ionizing radiation is applied thereon. The film 8 having transparency is covered, and further, the film 8 having transparency with ionizing radiation is irradiated with ionizing radiation R to be cured. Further, as shown in FIG. 2 (f), by peeling the film 8 having the ionizing radiation transparency, the mirror-finished inorganic decorative board 1 having excellent antifouling property can be obtained.

The inorganic base material 2 used for the inorganic decorative board 1 of the present invention is generally a calcium silicate board,
Examples include cement boards such as asbestos slate board, lightweight foam concrete board, hollow extruded cement board, etc., gypsum boards such as gypsum board and gypsum slag board, and fiber cement boards such as pulp cement board, asbestos cement board and wood chip cement board.

The base coat layer 3 is formed to prevent alkali components from being eluted from the inorganic base material 2 and to improve the adhesion between the inorganic base material 2 and the picture print layer 4 and the transferability of the picture print layer 4. It is provided for the purpose of the appearance of a design feeling, the configuration is optional, and it is a matter of course that it may be a single layer configuration of a resin composition having both of the above physical properties, but as a method of improving quality performance, To prevent elution of alkali components, a sealer layer 3a made of a curable resin such as a polyisocyanate-based resin, a moisture-curable urethane-based resin, and a styrene-acrylate copolymer resin, and a pattern printing on the surface of the inorganic base material 2. A primer layer 3b made of an acrylic urethane-based resin, a methacrylate-based resin paint or the like for the purpose of improving the adhesion and transferability of the layer 4;
It is desirable to have a layer configuration. Furthermore, by making the primer layer 3b colored and opaque, it is possible to impart concealing properties and to prevent the pattern printing layer 4 formed on the substrate from being affected by the color of the substrate to be bonded. .

As shown in FIG. 2A, the transfer sheet 6 for forming the pattern printing layer 4 on the inorganic decorative board 1 is composed of a polyolefin as a release layer on one side of a thin paper 7b. An arbitrary pattern printing layer 4 is laminated on the surface of the polyolefin resin layer 7a of the transfer sheet substrate 7 on which the entire resin layer 7a is formed. As the transfer sheet base material 7, a plastic film such as a polyethylene film, a polypropylene film, or a polyester film, a thin paper, a paper such as a pure white paper, or a composite film thereof, which is used as a base material of a normal transfer sheet is used. What laminated | stacked the polyolefin resin layer 7a, such as a polyethylene and a polypropylene, on the upper surface of the thin paper 7b is used preferably. In order to improve the thermal conductivity at the time of transfer, it is preferable that the transfer sheet base material 7 is as thin as possible. However, when the transfer sheet base material 7 is too thin, the base material is easily stretched at the time of printing such as gravure printing and the printability is deteriorated. It is desirable to back the thin paper 7b or the like from the viewpoint of printability.
It is most preferable that the substrate is coated with a polyolefin resin of 10 to 30 μm. Further, by using a polyolefin-based resin such as polyethylene or polypropylene, the transfer can be facilitated by utilizing the thermal flexibility even in the uneven shape of the surface of the inorganic base material 2.

As the pattern printing layer 4, a solid ink layer 4a of solid printing on the entire surface and a pattern ink layer 4b expressing, for example, a stone pattern, a cloth pattern, a surface pattern of natural leather, an abstract pattern, and the like are provided. As a vehicle of the ink for forming 4, a general-purpose resin such as an alkyd-based resin, a urethane-based resin, or a vinyl chloride-based resin is used, and if necessary, other additives such as an organic or inorganic pigment. A suitable mixture of a coloring agent such as a dye, an extender pigment, a stabilizer, a plasticizer, a solvent and the like can be used.

As the transparent resin forming the top coat layer 5, it is desirable to form a film having excellent surface properties such as stain resistance, scratch resistance, and solvent resistance. An ionizing radiation-curable resin such as urethane acrylate is suitable, and as a coating method,
Known coating means such as curtain flow coating, roll coating, spray coating and the like can be used, and the coating thickness is preferably 50 to 100 μm.

The fluorine-based additive to be mixed with the ionizing radiation-curable resin forming the top coat layer 5 includes a perfluoroalkyl group in which all hydrogen atoms of an alkyl group in the molecule are replaced by fluorine atoms, and a hydrophilic group. Alternatively, it is a surfactant having a lipophilic group. Then, the surface of the resin is modified by utilizing the surface migration property of the perfluoroalkyl group, and the perfluoroalkyl group is aggregated in the same molecule to improve the surface orientation, Transfer to the resin surface with a small amount of addition to modify the resin surface. As the addition amount of the fluorine-based surfactant, the resin surface is fluorine-modified by adding 0.5 to 2.0 parts by weight based on the resin solid content, the ionizing radiation-curable resin surface is made water- and oil-repellent, Antifouling,
Detackified.

Inorganic decorative board 1 of the present invention having excellent antifouling properties
The film 8 having an ionizing radiation transmitting property used for the preparation of the resin is a material that can transmit the ionizing radiation to be used, and is a material that can be released from the cured ionizing radiation-curable resin and has smoothness. Although, the fluorine-based surfactant mixed with the ionizing radiation-curable resin has an aerobic property that moves to the air side in the resin solution, and the fluorine-based surfactant moves to the resin surface, Since the antifouling property is exhibited by performing the surface modification of the resin layer, the film 8 having ionizing radiation transmitting property covering the ionizing radiation curable resin surface
It is preferable that the material be a material having good gas permeability, for example, a silicon resin film is used. In addition, after applying the ionizing radiation-curable resin, the fluorine-based surfactant is transferred to the surface of the resin solution, and the time until the curing of the resin solution is adjusted so that the surface-modified layer is easily formed. It may be.

[0018]

【Example】

Example 1 20 μm of polyethylene resin was applied to thin paper having a weight of 40 g / m ^2.
A desired pattern was printed on the polyethylene resin layer surface of the transfer sheet base material coated to a thickness of m using an alkyd resin-based ink with a gravure rotary printing machine to prepare a transfer sheet. Separately, a moisture-curable urethane-based resin paint is applied as a sealer layer to a calcium silicate plate having a thickness of 3 mm at a rate of 30 g / m ² ,
Further, 100 g / m ² of an acrylic urethane resin paint was applied as a white primer layer, and dried at 80 ° C. for 20 minutes. Next, the transfer sheet was placed on the coating film surface such that the pattern printing surface of the transfer sheet was opposed, and the hot platen temperature was 135 ° C and the pressure was 15 kg /
The image was transferred under heating and pressure at 5 cm ² for 5 minutes. After peeling off the transfer sheet base material of the transfer sheet, a UV-curable resin paint having the following composition is applied to the pattern transfer surface with a coating thickness of 50 to 60 μm.
(Dry) with a curtain flow coater, then covered with a silicone resin film, passed through an irradiation device equipped with two 80 w / cm ozoneless ultraviolet lamps at a speed of 20 m / min, and irradiated with ultraviolet light. The engineered resin liquid was cured. Next, the silicone resin film was peeled off to obtain an inorganic decorative board having excellent antifouling properties. [Ultraviolet curable resin coating composition] 100 parts by weight of polyester acrylate 3 parts by weight of photoinitiator (2-human peroxy-2-methyl-1-phenyl-fluorovan-1one bisamylphosphine oxide) 1 part by weight of fluorine additive (large) DEFENSA MCF-323SF manufactured by Nippon Ink Chemicals)

[0019]

As described above, according to the present invention, since the top coat layer is formed of the ionizing radiation curable resin mixed with the fluorine-based additive, the antifouling property of the decorative board surface is improved, and Thus, it is possible to obtain an inorganic decorative board excellent in antifouling properties that can easily wipe off dirt.

In addition, the film having ion-permeation radiation transparency is irradiated with ionizing radiation to cure the ionizing radiation-curable resin, and then the film is peeled off. The finished inorganic decorative board excellent in antifouling property can be obtained with good yield.

Further, since the pattern printing layer is provided directly on the base coat layer surface provided on the surface of the inorganic base material without using printing paper by transfer, even when used around a water flow such as a sink, the adhesiveness is low. It can be used as a decorative panel without any reduction and without heat resistance and fire resistance even when used around a gas stove, and can be used as a kitchen back panel.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an inorganic decorative board according to the present invention.

FIG. 2 is a cross-sectional view illustrating an example of the method for producing an inorganic decorative board according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inorganic decorative board 2 Inorganic base material 3 Base coat layer 3a Sealer layer 3b Primer layer 4 Picture printing layer 4a Solid ink layer 4b Picture ink layer 5 Top coat layer 6 Transfer sheet 7 Transfer sheet base material 8 Film having ionizing radiation transparency R ionizing radiation

Claims (3)

[Claims] 1. An inorganic decorative board in which a base coat layer, a pattern print layer and a top coat layer are sequentially laminated on an upper surface of an inorganic base material, wherein the top coat layer is ionizing radiation curable mixed with a fluorine-based additive. An inorganic decorative board excellent in antifouling properties, characterized by being formed of a resin. 2. A transfer sheet having a configuration in which the pattern printing layer has a pattern printing layer formed on one surface of a transfer sheet substrate, and a transfer sheet having the pattern printing layer and a base coat layer of an inorganic base material. The inorganic decorative board excellent in antifouling property according to claim 1, wherein the transfer base sheet is formed by peeling the transfer base sheet of the transfer sheet after placing the base sheet so as to be in contact with the base sheet and heating and pressing. . 3. A step of preparing a transfer sheet in which a pattern printing layer is laminated on one surface of a transfer sheet substrate, a step of coating a base coat layer on an upper surface of an inorganic base material, and A step of placing the base sheet layer on the inorganic base material so as to be in contact with the base coat layer and heating and pressing the same; a step of forming a pattern print layer on the upper surface of the inorganic base material by peeling off the transfer sheet base material of the transfer sheet; A step of applying an ionizing radiation-curable resin mixed with a fluorine-based additive to the surface of the printing layer, and covering an ionizing radiation-transmitting film on the upper surface of the ionizing radiation-curable resin; Irradiating ionizing radiation from
A method for producing an inorganic-based decorative board excellent in antifouling properties, comprising a step of forming a top coat layer by peeling off the film having ionizing radiation transparency.