JP4212660B2 - Manufacturing method of decorative board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a decorative board used for interiors and exteriors of houses and buildings, and particularly relates to a method for manufacturing a decorative board having a high design using a transfer method.
[0002]
[Prior art]
Various methods for manufacturing decorative boards using the transfer method have been proposed, but as a base coating film for transfer, a method using a urethane-based paint with polyisocyanate as a curing agent is generally used, and more production is possible. There were few examples using highly UV curable paints. This is a general characteristic of the transfer method, but the adhesiveness of the transfer layer cannot be obtained when the undercoat is completely cured. However, in the case of UV curable paints, the cured state of the coat is incomplete and incomplete. This is because it is usually difficult to control.
[0003]
For this reason, conventionally, a method has been used in which the transfer foil is pressure-bonded when the base coating is still in a liquid state, or a non-reactive component is added so that adhesiveness remains after curing. However, according to the former method, it is difficult to obtain a smooth surface, and according to the latter method, physical performance such as boiling resistance is not sufficient.
[0004]
[Problems to be solved by the invention]
The present invention has been made in order to solve these problems, and the object of the present invention is to make the base paint of the decorative board in a cured state so that adhesion of the transfer of the pattern can be obtained, and to have a smooth surface It is another object of the present invention to provide a production method capable of easily and efficiently obtaining a decorative board having sufficient physical properties.
[0005]
In order to achieve the above object in the present invention, in claim 1, 100 parts of resin (Daicel UCB Co., Ltd .: “Evekril 810” (registered trademark)) on the surface of the base material, bifunctional acrylic acid Apply UV curable paint with no added wax, which inhibits curing by oxygen consisting of 40 parts of ester monomer, 80 parts of pigment (titanium oxide) and 0.5 part of photoinitiator (2 ethoxy-2-phenylacetophenone). , Irradiated with ultraviolet rays to make the coated surface incompletely cured by inhibiting the curing, transfer an arbitrary pattern, and resin (Daicel UCB Co., Ltd .: “Evekril 810” (registered trademark)) 100 parts , 40 parts of 2-functional acrylate monomer, a wax (manufactured by Dainippon Ink and Chemicals Incorporated: "RS-401" (trade name)) 1 part photoinitiator (Ciba Geigy Ltd.: "DAROCUR # 1173" (registered trademark)) an ultraviolet curable coating material that does not cause curing inhibition and 0.5 part of was applied, and characterized in that by completely curing the whole was irradiated with ultraviolet light A method for manufacturing a decorative board is provided.
[0006]
The present inventor has paid attention to the phenomenon that a certain type of ultraviolet curable coating material inhibits curing due to oxygen in the air and causes the surface to become sticky, and various studies have been made on whether or not a transfer decorative board can be produced using this phenomenon. As a result, the design layer is transferred to the surface of the UV curable paint that has been incompletely cured due to the inhibition of curing by oxygen, and the UV curable paint is then applied to the UV curable paint. This is a method for producing a decorative board, wherein the whole is cured.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
As the base material 1 used in the present invention, a flat base material or an uneven base material in which the surface of an inorganic plate base material such as calcium silicate board, asbestos cement board, gypsum slag board is subjected to sealer treatment, surface polishing treatment, etc. Etc. can be used.
[0008]
The UV curable paint 3 that inhibits curing by oxygen is obtained by adding a monofunctional or polyfunctional acrylate monomer or methacrylate monomer to an acrylic acid ester oligomer or methacrylic acid ester oligomer such as urethane acrylate, polyester acrylate, or epoxy acrylate. Can be used.
[0009]
Some of the ultraviolet curable paints are usually added with wax so as not to cause curing inhibition by oxygen, but in the case of the present invention, those not added are used.
Moreover, in order to improve paintability and adhesiveness, adding an organic solvent is also performed suitably. In this case, the viscosity to be adjusted is preferably from several tens to several thousand cps.
Further, as a photoinitiator for supplementing the addition of a matting agent or pigment, exponential energy decay of incident light (Lambert-Beer's law), etc., 2-ethoxy-2-phenylamine or tertiary amine (P-dimethylaminobenz) Aldehyde, DMABA) may be added.
The coating amount is suitably 10 to 300 g / m ² , and usually 20 to 150 g / m ² is preferable.
[0010]
A normal high-pressure mercury lamp or a metal halide lamp can be used for ultraviolet irradiation. The ultraviolet curable coating is irradiated in an oxygen atmosphere to cause curing inhibition and give the surface stickiness.
The cure inhibition by oxygen in UV curing is usually the reaction of radical and oxygen (10 ⁹ l / mol · s), and the growth reaction of radical and monomer (10 ³ l / mol · s) is 1 million times. (Eiichi Takiyama: “Polyester Resin Handbook”, Nikkan Kogyo Shimbun, Inc.) will cause curing inhibition unless special measures are taken.
[0011]
Next, the pattern layer 4 is transferred. As a transfer method, transfer using a transfer sheet is possible. What is necessary is just to select suitably as a base film of a transfer sheet according to the surface shape and transfer temperature of a decorative board. When the substrate surface is flat, a transfer sheet using PP laminated paper or PET film as a base sheet can be used.
In addition, when the substrate surface has an uneven shape, a thermoplastic resin film that can follow the surface shape of the uneven substrate by heat of thermocompression bonding during transfer with a heat-resistant rubber roll or the like can be used. Specifically, there are a vinyl chloride film, a polyethylene film, a polypropylene film, or a laminate film of a polyethylene film or a polypropylene film and a vinyl chloride resin film.
[0012]
As the resin system of the binder for the ink of the pattern layer 4, a vinyl acetate resin system, a urethane resin system, a polyvinyl butyral resin system, or the like can be used depending on the required quality.
Moreover, the printing of the pattern to the base sheet of a transfer sheet can use well-known methods, such as gravure printing, offset printing, and silk screen printing.
[0013]
As the ultraviolet curable coating 5 used on the surface, a coating that does not inhibit curing by oxygen is used. What added the monofunctional or polyfunctional acrylate ester monomer or the methacrylic ester monomer to acrylic ester oligomers or methacrylic ester oligomers such as urethane acrylate, polyester acrylate, epoxy acrylate and silicone acrylate can be used. Further, an additive such as a matting agent or a wax that floats on the surface may be added, and the photoinitiator may be added.
Further, if the ultraviolet curable coating 5 used on the surface is transparent, the transferred pattern can be seen more three-dimensionally from the surface, which is preferable in terms of design.
These are mixed with a solvent to adjust to several tens to several thousand cps. The coating amount is suitably 5 to several hundred g / m ² , and usually preferably ²⁰ to 150 g / m ² .
[0014]
【Example】
<Example 1>
A flat asbestos-cement board having a thickness of 5 mm was used as a base material, and after applying a urethane resin sealer, a paint having the following formulation was applied as an ultraviolet curable paint causing inhibition of curing.
[0015]
<UV curable paint>
Resin (Daicel UCB Co., Ltd .: “Evecril 810” (registered trademark)) 100 parts Bifunctional acrylate monomer 40 parts Pigment (titanium oxide) 80 parts Photoinitiator (2 ethoxy-2-phenylacetophenone) 0.5 Department [0016]
After the coating material is adjusted to 200 cps and applied with a flow coater at 50 g / m ² , the surface is irradiated with ultraviolet rays with six 120 W / cm high-pressure mercury lamps at a line speed of 20 m / min, and the surface has adhesiveness due to inhibition of curing. Only the inside was cured.
[0017]
As a transfer sheet base film, a vinyl chloride film (8 parts by weight of plasticizer with respect to 100 parts by weight, 80 μm in thickness) was extruded and laminated with 20 μm of polypropylene resin, and this was printed with urethane resin ink. Thus, a transfer sheet was obtained.
[0018]
The pattern was transferred at a linear pressure of 20 kgf / cm and a line speed of 10 m / min with a silicon rubber roll heated to 160 ° C. with a rubber hardness of 80 degrees by combining the pattern layer side of the transfer sheet and the ultraviolet curable coating layer.
[0019]
Next, 40 g / m ^{2 of} an ultraviolet curable paint having the following composition was applied and cured by irradiating ultraviolet rays with six 120 W / cm high-pressure mercury lamps in air to obtain a decorative board.
[0020]
<UV curable paint>
Resin (Daicel UCB Co., Ltd .: “Evekril 810” (registered trademark)) 100 parts Bifunctional acrylate monomer 40 parts
Wax (Dainippon Ink & Chemicals, Inc .: “RS-401” (trade name)) 1 part
Photoinitiator (Ciba Geigy Co., Ltd .: “Darocur # 1173” (registered trademark)) 0.5 part
In the obtained decorative board, each layer was completely adhered and integrated, and was excellent in various physical properties such as surface hardness and stain resistance.
[0022]
【The invention's effect】
Since this invention is the above structure, there exist the following effects.
In other words, by causing the inhibition of curing upon irradiation with ultraviolet rays on the surface of the ultraviolet curable paint provided with the transfer pattern layer, initial ink adhesion can be obtained even when transferred at a low temperature.
In addition, the UV curable paint that has inhibited the curing is completely cured together when the surface UV curable paint is cured. Since the entire surface is cured after the shrinkage stress is relieved because the surface has adhesiveness due to inhibition of curing, each layer exhibits strong adhesion.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of a cross-sectional structure of a decorative board according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Sealer layer 3 ... The ultraviolet curable coating material which inhibits hardening by oxygen 4 ... Picture layer 5 ... The ultraviolet curable coating material which does not produce hardening inhibition by oxygen

Claims (1)

On the surface of the substrate, 100 parts of resin (manufactured by Daicel UCB Co., Ltd .: “Evekril 810” (registered trademark)) , 40 parts of bifunctional acrylate monomer, 80 parts of pigment (titanium oxide), photoinitiator (2 (Ethoxy-2-phenylacetophenone) Oxygen consisting of 0.5 parts causes curing inhibition, applies a UV curable paint without added wax, and irradiates UV to make the coated surface incompletely cured due to inhibition of curing. An arbitrary pattern is transferred, and 100 parts of resin (manufactured by Daicel UCB Co., Ltd .: “Evekril 810” (registered trademark)) , 40 parts of bifunctional acrylate monomer, wax (Dainippon Ink Chemical Co., Ltd.) Co., Ltd.): "RS-401" (trade name)), 1 part of a photoinitiator (Ciba-Geigy Co., Ltd.: "Darocure # 1173" (registered trademark)) 0.5 parts Applying a UV curable coating that does not result in Li Cheng curing inhibition, manufacturing method of decorative laminate, characterized by being formed by completely curing the whole was irradiated with ultraviolet light.

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