JP5462498B2 - Wood board and manufacturing method thereof - Google Patents

Description

The present invention relates to a wooden board and a method for manufacturing the same.

  In recent years, one in three people in Japan are said to suffer from allergic diseases such as atopic dermatitis, bronchial asthma, and allergic rhinitis. Causes of allergic diseases include mites, pollen, mold, pet hair and the like.

  In particular, dust mite allergens (hereinafter referred to as “mite allergens”), which account for 70% or more of the mites detected from indoors, are a problem. It is said that the dust mites are allergens such as worms, carcasses, shells, and fungi. Among these, mite-derived mite allergens are the most problematic because they have high allergen activity and are very small and easily soar, so they often come into contact with the human body.

  In general, the flooring floor in the room is considered to have almost no mite allergen compared to carpets and tatami mats. However, in recent years, it has been reported that mite allergens exist on the flooring floor, which greatly exceeds the guidelines provided by the Ministry of Health, Labor and Welfare. Also, mite allergens present on the flooring are very likely to soar, so even a small amount has been reported to be as dangerous to the human body as carpets contaminated with ticks, removing allergen particles from the flooring. Is very effective in preventing allergic diseases.

  Also, mite allergens and pet-derived allergen substances that are very small and easily fluttered adhere to the wall surface of the room, and they are regarded as a problem because they are very likely to flutter during cleaning.

  Examples of a method for reducing and removing mite allergens that have accumulated and adhered to the flooring and the wall surface include a method for removing mite allergens with a vacuum cleaner, mop, or the like. However, mite allergens are very small and easily soared that it was virtually impossible to remove them completely.

  On the other hand, as a method for suppressing allergens present in the room, a method of applying an antiallergen agent such as zirconium salt to a building material has been proposed (see Patent Document 1).

  Further, as a method for suppressing allergens present on the indoor flooring floor, a method of applying a floor polish containing an anti-allergen agent has been proposed (see Patent Document 2). According to this method, it is possible to suppress allergens by periodically applying a floor polish containing an anti-allergen agent.

  However, according to the method described in Patent Document 2, the floor polish itself has poor wear resistance, chemical resistance, and alkali resistance, and seasonings such as pet excreta, alcohol, vinegar, detergents, bleaching agents, etc. are adhered. In such a case, peeling, elution, whitening, etc. easily occur, and it has not always been a sufficient measure for allergen suppression.

  In order to solve this problem, a water-insoluble polymer having a phenolic hydroxyl group is used as an antiallergenic agent, and a curable resin composition containing active energy rays such as ultraviolet rays and electron beams containing the polymer is used as a wooden substrate. There has been proposed a flooring in which a curable resin coating film containing an antiallergen agent is formed on the surface thereof by applying and curing the coating (Patent Document 3). According to this flooring material, durability such as wear resistance and chemical resistance can be imparted to the curable resin coating film containing the anti-allergen agent.

JP 2001-212806 A JP 2001-214130 A JP 2008-239721 A

  However, in the technique described in Patent Document 3, a curable resin coating film containing an anti-allergen agent is formed on a wooden substrate having a relatively non-uniform thickness. Therefore, the thickness of the curable resin coating film is not stable, and the antiallergen performance may not be stably exhibited. Moreover, since the thickness of the wood substrate is relatively non-uniform, it is necessary to make the thickness of the curable resin coating film relatively large. Therefore, the amount of the anti-allergen agent to be used must be increased, and the cost is reduced. There were restrictions on

  In addition, when a curable resin composition containing an anti-allergen agent is applied to a wooden substrate processed into a curved surface or a three-dimensional shape instead of a flat shape like a normal flooring material, application of the curable resin composition In some cases, unevenness occurs or the coating operation becomes complicated. Furthermore, due to the curved surface or three-dimensional shape of the wooden base material, a shadowed portion is generated when the active energy ray is irradiated, and there is a case where poor curing occurs in this portion.

The present invention has been made in view of the circumstances as described above, can exhibit anti-allergen performance stably, can reduce the cost by reducing the amount of anti-allergen agent used, An object of the present invention is to provide a wooden board capable of improving the productivity of the wooden board and a method for manufacturing the same.

  The present invention is characterized by the following in order to solve the above problems.

First, the wood board of the present invention contains a reactive monomer including at least a water-insoluble polymer antiallergen having a phenolic hydroxyl group not supported on an inorganic carrier, a reactive oligomer, and an aliphatic acrylate monomer. A decorative sheet having a curable resin coating film formed by curing a curable resin composition containing an active energy ray-curable resin is bonded to a wooden substrate. .

Secondly, the method for producing a wood board of the present invention comprises a reactive agent comprising at least a water-insoluble polymer anti-allergen having a phenolic hydroxyl group not supported on an inorganic carrier, a reactive oligomer, and an aliphatic acrylate monomer. A process for obtaining a decorative sheet having a curable resin coating film containing an anti-allergen agent on its surface by applying a curable resin composition containing an active energy ray-curable resin containing a monomer to the decorative sheet and curing the composition. And a step of sticking the decorative sheet to the wooden substrate with the curable resin coating film containing the anti-allergen agent on the outside.

  According to the first aspect, since the decorative sheet has a uniform thickness, the curable resin composition containing the anti-allergen agent is applied to the uniform decorative sheet to form a curable resin coating film. Thus, the thickness of the curable resin coating film is stabilized, and the antiallergen performance can be exhibited stably. Moreover, since the decorative sheet has a uniform thickness, the thickness of the curable resin coating film can be reduced. Therefore, even if a small amount of the anti-allergen agent is contained in the curable resin coating film, the anti-allergen agent is exposed on the surface of the curable resin coating film, and the anti-allergen performance can be exhibited stably. Therefore, the usage-amount of an antiallergen agent can be reduced and cost reduction can be achieved.

Moreover, by using an active energy ray-curable resin as the curable resin, in addition to the effect of the first invention, a decorative sheet coated with a durable curable resin coating film can be easily obtained in a short time. Can do.

According to the second invention, since the decorative sheet having a curable resin coating film containing an anti-allergen agent formed on the surface thereof is adhered to the wooden substrate, the productivity of the wooden board is improved. improves. That is, when a decorative sheet is applied to a wooden substrate processed into a curved surface or a three-dimensional shape, and then a curable resin composition containing an anti-allergen agent is applied and cured to form a curable resin coating film Compared to the above, the occurrence of uneven coating of the curable resin composition can be suppressed, and the coating operation is facilitated. Further, when an active energy ray curable resin is used as the curable resin, a curable resin composition containing an anti-allergen agent after a decorative sheet is attached to a wooden substrate processed into a curved surface or a three-dimensional shape. Is applied, a shadowed portion is generated when the active energy ray is irradiated due to the curved surface or three-dimensional shape of the wooden base material, and this portion may cause poor curing. However, such a curing failure can be prevented by applying a curable resin composition containing an anti-allergen agent to a decorative sheet in advance and curing to form a curable resin coating film.

It is an expanded sectional view showing an embodiment of a decorative sheet of the present invention. It is sectional drawing which shows embodiment of the wooden board of this invention. It is sectional drawing which shows another embodiment of the wooden board of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an enlarged cross-sectional view showing an embodiment of the decorative sheet of the present invention.

  As shown in the figure, the decorative sheet 1 of the present embodiment has a curable resin coating 3 containing an anti-allergen agent 2 on the surface.

  As the decorative sheet 1, for example, a sheet in which a pattern such as a wood grain pattern or an abstract pattern is formed by printing or the like can be used. Examples of the material of the decorative sheet 1 include resin materials such as polypropylene, polyethylene, polyester, and acrylic, and paper materials. The decorative sheet 1 may have a single-layer configuration of these materials, or may have two or more multilayer configurations.

  Examples of the anti-allergen agent 2 contained in the curable resin coating 3 on the surface of the decorative sheet 1 include an anionic surfactant supported on an inorganic carrier, a compound or polymer having a hydroxyl group supported on an inorganic carrier, inorganic Examples thereof include a metal salt supported on a carrier. Further, a water-insoluble polymer having a phenolic hydroxyl group can be used as the anti-allergen agent 2.

  Examples of the anionic surfactant as the antiallergen agent 2 include sodium benzenesulfonate, disodium lauryl diphenyl ether sulfonate, sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium polyoxylen lauryl ether sulfate, hexadecylpyridinium chloride, Examples include hexadecylpyridinium bromide, octadecylpyridinium bromide, dodecylpicolinium bromide, dodecylpyridinium chloride, benzylpyridinium chloride, butylpyridinium chloride, ammonium salts, amines such as triethanolamine and octadecyltrimethylamine, and amine salts. These may be used alone or in combination of two or more.

  Examples of the compound or polymer having a hydroxyl group as the antiallergen 2 include gallic acid, polyvinyl alcohol, poly (4-vinylphenol), polytyrosine, lignophenol derivative, cellulose, starch, hydroxyethylcellulose, methylcellulose, ethylcellulose, Examples thereof include hydroxypropylcellulose, inulin, chitosan, cluster dextrin, guar gum, tannic acid, catechin, chitin, chitosan, plant extract and the like. These may be used alone or in combination of two or more.

  Examples of the metal salt as the anti-allergen agent 2 include sulfates, acetates and phosphates of divalent and tetravalent metals such as copper, zinc, zirconium, tin, lead and aluminum, lithium, sodium, potassium, Examples thereof include carbonates of alkali metals such as rubidium, cesium, and francium, and double salts containing these. For example, zinc sulfate, alum, lead acetate, and the like can be used. These may be used alone or in combination of two or more.

  The anionic surfactant, the compound or polymer having a hydroxyl group, and the metal salt as the anti-allergen agent 2 described above are low in coloring level and do not impair the appearance of the substrate, and are easily available on the market. Those having high safety are preferably used. These anti-allergen agents 2 are supported on an inorganic carrier and used as inorganic particles.

  As the inorganic carrier, conventionally known inorganic carriers can be used without particular limitation, and those having a large surface area are usually preferred. Specifically, inorganic oxides, that is, oxides such as Al, La, Ce, Si, Ti, Zr, Th, V, Nb, Ta, Cr, or a combination of two or more thereof, for example, silica Silica gel, silica alumina, silica magnesia, silica titania, alumina titania, hydroxyapatite, zeolite, zirconium phosphate, porous ceramics can be used, or clay minerals such as montmorillonite and kaolin, and natural products such as diatomaceous earth are used. You can also. Among them, those which are physically and chemically stable for a long time are preferable, and silica, silica gel, zirconium phosphate and the like are particularly preferable.

  As the inorganic carrier, those obtained by carrying silver ions or copper ions on the inorganic carrier as exemplified above are preferably used.

  The method for supporting the anti-allergen agent 2 on the inorganic carrier is not particularly limited, and for example, a conventionally known method can be used. For example, by impregnating an inorganic carrier molded into a powder, pellet or the like with an aqueous solution of the desired anti-allergen agent 2, removing excess water by filtration or evaporation, drying, and then firing as necessary The anti-allergen agent 2 can be supported on an inorganic carrier. Alternatively, the anti-allergen agent 2 can be supported on the inorganic carrier by adding an aqueous solution of the desired anti-allergen agent 2 to the hydrosol or slurry of the inorganic carrier, kneading, drying, and firing if necessary.

  The amount of the anti-allergen agent 2 supported on the inorganic carrier is not particularly limited, and varies depending on the type of the inorganic carrier or the anti-allergen agent 2, but if it is too much, the long-term stability of the inorganic carrier will not be exhibited. The performance of the allergen agent 2 is not exhibited. The loading amount of the anti-allergen agent 2 on the inorganic carrier is usually 0.1 to 80% by mass, preferably 1 to 60% by mass with respect to the inorganic carrier.

  The water-insoluble polymer having a phenolic hydroxyl group as the anti-allergen agent 2 adsorbs and captures the allergen substance by the phenolic hydroxyl group and deactivates (suppresses) its energy activity. Moreover, since it is a water-insoluble polymer, it can prevent bleeding and dissolution in the presence of water and high humidity conditions. When a water-insoluble polymer having a phenolic hydroxyl group is used as the antiallergen agent 2, it can be used without being supported on an inorganic carrier as described in Patent Document 3.

  Examples of the water-insoluble polymer having a phenolic hydroxyl group include polyvinylphenol such as poly (3,4,5-hydroxybenzoic acid vinyl) and poly (4-vinylphenol), polytyrosine, and poly (1-vinyl- 5-hydroxynaphthalene), poly (1-vinyl-6-hydroxynaphthalene), poly (1-vinyl-5-hydroxyanthracene) and the like. Among them, polyvinylphenol is preferably used because it is a monophenol, has a low coloring level, does not impair the appearance of the substrate, has high workability, and is easily available as a commercial product.

  The content of the anti-allergen agent 2 is any anti-allergen agent 2 such as the anionic surfactants exemplified above, a compound or polymer having a hydroxyl group, a metal salt, and a water-insoluble polymer having a phenolic hydroxyl group. Even when used, it is preferably 5 to 50% by mass, more preferably 10 to 30% by mass, based on the total amount of the curable resin composition to be described later for forming the curable resin coating film 3. If the content is too small, the anti-allergen performance may not be sufficiently exhibited. On the other hand, if the content is too large, the durability of the curable resin coating film 3 may be insufficient.

  The curable resin composition used in the present invention forms the curable resin coating film 3 by curing the resin by crosslinking. By using such a curable resin composition, the durability of the curable resin coating film 3 can be improved. Examples of the curable resin composition include those using an active energy ray curable resin, a thermosetting resin, or the like as the curable resin.

  Examples of the active energy ray curable resin include an ultraviolet curable resin and an electron beam curable resin.

  Examples of the thermosetting resin include polyester resin, urethane resin, melamine resin, epoxy resin, and silicone resin.

  In the present invention, an active energy ray curable resin is preferably used because the decorative sheet 1 coated with the durable curable resin coating 3 can be easily obtained in a short time.

  Hereinafter, the curable resin composition using the active energy ray-curable resin will be described. This curable resin composition is cured with an active energy ray together with the anti-allergen agent 2 (hereinafter referred to as “anti-allergen agent 2” as including inorganic particles carrying the anti-allergen agent 2 on the above-mentioned inorganic carrier). The mold resin contains at least one selected from reactive oligomers and reactive monomers.

  The reactive oligomer can improve the coating strength such as stain resistance and scratch resistance by blending it with the curable resin composition. The reactive oligomer is preferably a resin obtained by polymerizing a photocurable (meth) acrylate monomer having two or more acryloyl groups or methacryloyl groups in one molecule. Examples of reactive oligomers include urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate, epoxy (meth) acrylate, polybutadiene (meth) acrylate, silicone (meth) acrylate, and acrylic ester co-polymerization. Examples thereof include a copolymer (meth) acrylate having an acryloyl group or a methacryloyl group introduced into the side chain of the coalescence. Further, it may be a copolymer containing a unit derived from a fluorine-containing olefin, a unit derived from a polymerizable unsaturated group-containing silicone, or a unit derived from a hydroxyl group-containing unsaturated ether.

  Said reactive oligomer may be used individually by 1 type, and may use 2 or more types together. Preferably, urethane acrylate or ester-modified epoxy acrylate having 3 or more acryloyl groups in one molecule is used.

  The molecular weight (Mw) of the reactive oligomer is preferably in the range of 500 to 4000. If the molecular weight is too small, the coating strength of the curable resin coating 3 may be insufficient. When the molecular weight is too large, it becomes difficult to obtain a good balance between the viscosity, the stain resistance, and the antiallergen performance of the curable resin composition.

  The compounding amount of the reactive oligomer is preferably 10 to 70% by mass, more preferably 20 to 50% by mass with respect to the total amount of the curable resin composition. If the amount is too small, the coating strength of the curable resin coating 3 may be insufficient. If the amount is too large, the curable resin coating film 3 may be too hard and brittle.

  The reactive monomer is used as a reactive diluent or a crosslinking agent. Specific examples of the reactive monomer include acrylic acid, methacrylic acid, acryloylmorpholine, N-vinylformamide, 2-ethylhexyl acrylate, lauryl acrylate, isobornyl acrylate, 3-methoxydibutyl acrylate, ethyl carbitol acrylate, methoxytril Propylene glycol acrylate, phenoxyethyl acrylate, phenoxy polyethylene glycol acrylate, 2-ethylhexyl acrylate, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, hydroxypivalate neopentyl glycol acrylate, 2- (2-ethoxyethoxy) ethyl acrylate, tetrahydrofurfuryl acrylate, 2 Phenoxyethyl acrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, 1,3-butylene glycol diacrylate, tripropylene glycol diacrylate, 1,9-nonanediol diacrylate, 1,10-decanediol diacrylate, tricyclode Canmethanol diacrylate, glycerin triacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, ditrimethylolpropane tetraacrylate, dipentaerythritol hexaacrylate, dipentaerythritol penta (hexa) acrylate, methoxypolyethylene glycol # 400 acrylate, isocyanuric acid ethyl Emissions oxide-modified diacrylate, tris (acryloxyethyl) isocyanurate. These may be used alone or in combination of two or more.

  Among the above-mentioned reactive monomers, a monomer having 1 to 3 (meth) acryloyl groups and having a Tg (glass transition temperature) of 100 ° C. or higher is added to the curable resin composition so that the curable resin coating is used. The stain resistance, scratch resistance and crack resistance of the film 3 can be improved. Examples of such monomers having a Tg of 100 ° C. or higher include isobornyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, acryloyl morpholine, tricyclodecane dimethylol di (meth) acrylate, isocyanuric acid ethylene oxide-modified diacrylate, And tris (acryloxyethyl) isocyanurate. These may be used alone or in combination of two or more.

Moreover, among the above reactive monomers, an aliphatic acrylate monomer having 1 to 2 (meth) acryloyl groups can be used to blend a curable resin composition without deteriorating antiallergen performance. The viscosity can be reduced.

Since the anti-allergen agent 2 usually has a functional group having a high hydrogen bonding ability, an interaction works with a polymer having a carbonyl group or an ether group. However, if an interaction due to hydrogen bonding acts between a functional group having a high hydrogen bonding ability, which is an active site that inactivates an allergen substance, and a polymer, sufficient antiallergen performance may be difficult to develop. On the other hand, by using an aliphatic acrylate monomer in which the anti-allergen agent 2 can be dispersed, the viscosity of the curable resin composition can be reduced without reducing the anti-allergen performance.

Examples of the aliphatic acrylate monomer include 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, hydroxypivalate neopentyl glycol acrylate, and 1,9-nonanediol diacrylate. 1,10-decanediol diacrylate, glycerin triacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate and the like. These may be used alone or in combination of two or more.

The blending amount of the aliphatic acrylate monomer realizes low viscosity of the curable resin composition without lowering the antiallergen performance, and also secures other coating film properties. Preferably it is 3-45 mass% with respect to solid content, More preferably, it is 5-40 mass%.

  In addition to the anti-allergen agent 2, the reactive oligomer, and the reactive monomer, the curable resin composition may contain a photopolymerization initiator within a range that does not impair the effects of the present invention.

  As the photopolymerization initiator, a hydrogen abstraction type or an intramolecular cleavage type can be used.

  Examples of the hydrogen abstraction type photopolymerization initiator include benzophenone / amine-based, Michler ketone / benzophenone-based, and thioxanthone / amine-based photopolymerization initiators.

  Examples of the intramolecular cleavage type photopolymerization initiator include benzoin type, acetophenone type, benzophenone type, thioxanthone type, and acylphosphine oxide type photopolymerization initiators. Among them, highly reactive acetophenone type 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- [4- (2 -Hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, phenylglyoxylic acid methyl ester, acylphosphine oxide type monoacylphossine whose absorption edge extends to a long wavelength Fin oxide and bisacylphosphine oxide are preferred.

  The blending amount of the photopolymerization initiator is preferably 1 to 10% by mass with respect to the resin solid content of the curable resin composition from the viewpoint of enhancing the reactivity and not impairing the physical properties of the coating film. Preferably it is 3-6 mass.

  To the curable resin composition, additives other than the anti-allergen agent 2, the reactive oligomer, the reactive monomer, and the photopolymerization initiator can be blended within the range not impairing the effects of the present invention. Examples of such additives include waxes, antibacterial agents, antifungal agents, non-reactive diluents, polymerization inhibitors, matting materials, antifoaming agents, antisettling agents, leveling agents, dispersing agents, heat stabilizers. , Ultraviolet absorbers, organic solvents and the like. Examples of the organic solvent include alcohols, ketones, esters, amines, and the like. Among these, solvents having high electron donating properties such as alcohols, ketones, and esters are preferable because they are easily dissolved.

  The curable resin composition using the active energy ray-curable resin or the thermosetting resin described above is applied to the decorative sheet 1 and then cured, whereby the curable resin coating film 3 is applied to the decorative sheet 1. Is formed. The means for applying the curable resin composition to the decorative sheet 1 is not particularly limited. For example, the curable resin composition is applied to the decorative sheet 1 by using a roll knife coater, a die coater, a reverse roll coater, or the like. It can be applied uniformly.

The curable resin composition using the active energy ray-curable resin can cure the coating film by irradiating active energy rays such as ultraviolet rays and electron beams after applying it to the decorative sheet 1. From an economic viewpoint, it is preferable to use ultraviolet rays. For example, when a high-pressure mercury lamp is used, the coating film can be cured at an irradiation amount of 250 to 400 mJ / cm ² . When an electron beam is used, for example, the coating film can be cured by irradiating the electron beam under conditions of an acceleration voltage of 200 kV and an electron dose of 30 kGy in a nitrogen atmosphere.

  In addition, a semi-cure process may be introduced in advance before the curable resin composition is completely cured with active energy rays.

  A curable resin composition using a thermosetting resin can cure a coating film by proceeding a curing reaction, for example, at normal temperature or under heating, according to a conventional method.

  The thickness of the curable resin coating film 3 thus formed is preferably 1 to 50 μm. If the thickness is too small, it may be difficult to stably apply the curable resin composition. On the other hand, if the thickness is too large, the decorative sheet 1 may crack when the lapping process is performed on the wooden base material 4 shown in FIGS. 2 and 3, which will be described later, and the amount of the anti-allergen agent 2 used increases. Cost reduction may be difficult.

  According to the decorative sheet 1 of the present embodiment, the curable resin composition containing the anti-allergen agent 2 is applied to the decorative sheet 1 having a uniform thickness to form the curable resin coating film 3, thereby forming the curable resin. The thickness of the coating film 3 is stable, and the antiallergen performance can be exhibited stably. Moreover, since the decorative sheet 1 has a uniform thickness, the thickness of the curable resin coating film 3 can be reduced. Therefore, even if the anti-allergen agent 2 contained in the curable resin coating 3 is a small amount, the anti-allergen agent 2 is exposed on the surface of the curable resin coating 3, and the anti-allergen performance can be exhibited stably. Therefore, the usage-amount of the antiallergen agent 2 can be reduced and cost reduction can be achieved.

  FIG. 2 is a cross-sectional view showing an embodiment of the wood board of the present invention. The wooden board 5 shown in the figure is obtained by sticking the decorative sheet 1 of the above-described embodiment to the wooden base material 4 with the curable resin coating film 3 containing the anti-allergen agent 2 outside. is there.

  Examples of the wood substrate 4 include MDF (medium density fiberboard) and plywood.

  When adhering the decorative sheet 1 to the wooden base material 4, for example, depending on the shape of the wooden base material 4, the decorative sheet 1 is laminated on the wooden base material 4 with a laminator, a wrapping machine, a vacuum forming machine or the like and bonded. Adhere with an agent. Examples of the adhesive used at the time of lamination include a reactive hot melt adhesive, a solvent dilution adhesive, and an aqueous two-component urethane adhesive.

  The wood board 5 thus obtained is a single or a combination of a plurality of flooring materials such as flooring floors, joinery, construction materials, indoor wall materials, stairs, fences, doors, counters, and side panels of furniture. It can be used as a front plate or the like.

  FIG. 3 is a cross-sectional view showing another embodiment of the wood board of the present invention. As shown in the figure, in the present embodiment, a wooden substrate 4 having a curved surface and processed into a three-dimensional shape is used. And the wooden board 5 was obtained by sticking the decorative sheet 1 to the wooden base material 4 with the curable resin coating film 3 containing the anti-allergen agent 2 outside as in the embodiment described above. is there.

  According to this embodiment, after applying the decorative sheet 1 to the wooden substrate 4 having a curved surface and processed into a three-dimensional shape, the curable resin composition containing the anti-allergen agent 2 is applied and cured. Compared with the case where the curable resin coating film 3 is formed, the occurrence of uneven application of the curable resin composition can be suppressed, and the application work is facilitated.

  In addition, when an active energy ray-curable resin is used as the curable resin, the curing containing the anti-allergen agent 2 after the decorative sheet 1 is attached to the wooden substrate 4 having a curved surface and processed into a three-dimensional shape. When the curable resin composition is applied, a shadowed portion is generated when the active energy ray is irradiated due to the curved surface or three-dimensional shape of the wooden substrate 4, and curing failure may occur in this portion. However, in this embodiment, since the curable resin composition containing the anti-allergen agent 2 is previously applied to the decorative sheet 1 and cured to form the curable resin coating film 3, such a curing failure can be prevented. .

  Although the present invention has been described above based on the embodiments, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Cosmetic sheet 2 Antiallergen agent 3 Curable resin coating film 4 Wood substrate 5 Wood board

Claims (2)

A water-insoluble polymer anti-allergen agent having a phenolic hydroxyl group not supported on an inorganic carrier, a reactive oligomer, and an active energy ray-curable resin containing a reactive monomer containing at least an aliphatic acrylate monomer A wood board, wherein a decorative sheet having a curable resin coating film formed by curing a curable resin composition is attached to a wood substrate. A water-insoluble polymer anti-allergen agent having a phenolic hydroxyl group not supported on an inorganic carrier, a reactive oligomer, and an active energy ray-curable resin containing a reactive monomer containing at least an aliphatic acrylate monomer A step of obtaining a decorative sheet having a curable resin coating film containing an anti-allergen agent on its surface by applying and curing the curable resin composition on the decorative sheet; and a curable resin coating film containing the anti-allergen agent And a step of attaching the decorative sheet to the wooden substrate on the outside.

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