Title of invention: Method for manufacturing transfer sheet and melamine decorative board
Technical field
[0001]
The present invention relates to a method for producing a transfer sheet and a melamine decorative board.
Background technology
[0002]
Conventionally, for example, a transfer sheet has been proposed in which a transfer layer and an adhesion layer are laminated in this order on one surface side of a base material layer, and the transfer layer contains a cured product of an ionizing radiation curable resin (for example). , Patent Document 1). In the transfer sheet described in Patent Document 1, a transfer sheet is laminated on a laminate in which a core layer and an uncured melamine resin layer are laminated, and heating and pressurization are performed (thermal pressure transfer) to obtain an uncured melamine resin layer. Is cured to produce a melamine decorative board.
Further, as the laminate laminated with the transfer sheet, there is a base paper, a pattern layer, and a layer having a liquid-repellent layer that imparts a gloss difference synchronized with the pattern of the pattern layer (see, for example, Patent Document 2). ..
Prior art literature
Patent documents
[0003]
Patent Document 1: JP-A-2019-64132
Patent Document 2: Japanese Unexamined Patent Publication No. 2018-176484
Outline of the invention
Problems to be solved by the invention
[0004]
However, when the transfer sheet described in Patent Document 1 is applied to the laminate described in Patent Document 2, the ionized radiation curable resin of the transfer layer may crack during thermal pressure transfer.
The present invention focuses on the above points, and an object of the present invention is to provide a method for manufacturing a transfer sheet and a melamine decorative board capable of preventing film cracking during thermal pressure transfer.
Means to solve the problem
[0005]
In order to solve the above problems, one aspect of the present invention includes (a) a base material layer, (b) a transfer layer provided on one surface side of the base material layer, and (c) a base material of the transfer layer. The resin constituting the transfer layer is an uncured ionizing radiation curable resin, and the resin constituting the adhesion layer is provided with an adhesion layer provided on the surface side opposite to the layer. The gist is that the transfer sheet is a heat-curable resin that does not contain a component that exhibits liquid repellency.
[0006]
Further, another aspect of the present invention is (a) a method for producing a melamine decorative board using the transfer sheet, and (b) a repellent partially provided on one surface side of the core layer and the core layer. The first laminated body having the liquid layer is immersed in an aqueous melamine resin solution, and the second laminated body formed by laminating the transfer sheet on the surface of the immersed first laminated body on the liquid-repellent layer side is pressurized and heated. A step of curing the uncured product of the aqueous melamine resin solution contained in the core layer, (c) the base material layer of the transfer sheet is peeled off from the first laminated body, and a part of the transfer layer of the transfer sheet is first. The gist of the present invention is a method for producing a melamine decorative board, which comprises a step of transferring to a laminated body and (d) a step of irradiating the first laminated body with ionizing radiation to cure the ionized radiation curable resin of the transfer layer.
Effect of the invention
[0007]
According to one aspect of the present invention, the ionized radiation curable resin of the transfer layer is in an uncured and flexible state, and the heat-curable resin of the adhesion layer does not contain a component that develops liquid repellency. It is possible to provide a method for producing a transfer sheet and a melamine decorative board capable of preventing film cracking of the transfer layer due to pressure transfer.
A brief description of the drawing
[0008]
FIG. 1 is a cross-sectional view showing a transfer sheet according to an embodiment of the present invention.
2A and 2B are views showing how to use the transfer sheet, in which FIG. 2A is a sectional view showing a first laminated body, FIG. 2B is a sectional view showing a second laminated body, and FIG. 2C is a sectional view showing the second laminated body. It is sectional drawing which shows the melamine decorative board.
Embodiment for carrying out the invention
[0009]
Next, an embodiment of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each layer, etc. are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention describes the material, shape, structure, etc. of the constituent parts as follows. It is not specific to the thing. The technical idea of ​​the present invention may be modified in various ways within the technical scope specified by the claims described in the scope of patent claims.
[0010]
(Transfer sheet)
As shown in FIG. 1, the transfer sheet 1 of the present embodiment is formed by laminating the transfer layer 3 and the adhesion layer 4 on one surface 2a side of the base material layer 2 in this order.
[0011]
(Base layer)
The base material layer 2 is the base layer of the transfer sheet 1. As the material of the base material layer 2, a material having high flexibility is preferable from the viewpoint of easiness of peeling after transfer. For example, polyester resin such as polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, polyester-based thermoplastic elastomer; polyolefin such as polyethylene resin, polypropylene resin, polymethylpentene resin, olefin-based thermoplastic elastomer. Resin: Leaf thin paper on which a polyolefin resin is laminated on the surface can be adopted. In particular, polyester resin is preferable from the viewpoint of heat resistance and dimensional stability.
At least one of mirror finish and matte finish is performed on a part or the entire surface of one surface 2a of the base material layer 2. The gloss value of the matte-finished portion is not particularly limited.
[0012]
(Transfer layer)
The transfer layer 3 is a layer that is transferred to the first laminated body 8 (described later) used in the production of the melamine decorative board 12. An uncured ionizing radiation curable resin is used as the resin constituting the transfer layer 3. As the ionizing radiation curable resin, for example, a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes into a three-dimensional polymer structure can be adopted. As the ionized radiation, for example, an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule can be adopted. Examples thereof include ultraviolet rays (UV), electron beams (EB), electromagnetic waves, and charged particle beams. The ionizing radiation curable resin has a tack-free property that the resin does not adhere only by heat drying, and an aftercure property that can be cured by irradiating an ultraviolet ray or an electron beam even after thermal pressure transfer. , At least one of an ultraviolet curable resin and an electron beam curable resin is preferable.
[0013]
The ultraviolet curable resin is not particularly limited, and is a transparent resin containing a prepolymer (including an oligomer) and / or a monomer as a main component, which contains a radically polymerizable double bond in the molecule, which can undergo a polymerization cross-linking reaction by irradiation with ultraviolet rays. Can be adopted. As the prepolymer or monomer, a compound having a radically polymerizable unsaturated group such as a (meth) acryloyl group, a (meth) acryloyloxy group, a cationically polymerizable functional group such as an epoxy group, or the like can be adopted in the molecule. Further, a polyene / thiol-based prepolymer obtained by combining polyene and polythiol is also preferable. Here, the (meth) acryloyl group means an acryloyl group or a methacryloyl group.
[0014]
Examples of the prepolymer having a radically polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and silicone (meth) acrylate. Can be mentioned. These molecular weights are preferably about 250 to 100,000.
Examples of the monomer having a radically polymerizable unsaturated group include methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and phenoxyethyl (meth) acrylate. Further, for example, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethyl propanetri (meth) acrylate, trimethyl propaneethylene oxide tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipenta. Examples thereof include erythritol penta (meth) acrylate and dipenta erythritol hexa (meth) acrylate.
[0015]
Examples of the prepolymer having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol type epoxy resin and novolak type epoxy compound, and vinyl ether resin such as fatty acid vinyl ether and aromatic vinyl ether. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Further, examples of the polyene include those in which allyl alcohol is added to both ends of a polyurethane made of diol and diisocyanate.
[0016]
The electron beam curable resin is not particularly limited, and examples thereof include unsaturated polyesters, vinyl group-containing compounds, and acrylic acid (methacrylic acid) ester compounds. Examples of the acrylic acid ester-based compound include one or more of oligomers or prepolymers such as urethane acrylate, polyester acrylate, polyol acrylate, epoxy acrylate and polyester acrylate having one or more acrylic groups.
[0017]
(Adhesion layer)
The adhesion layer 4 is a layer for improving the adhesion between the transfer layer 3 and the first laminated body 8. As the resin constituting the adhesion layer 4, for example, a heat-curable resin such as a urethane resin or an acrylic resin can be adopted. As the heat-curable resin, it is preferable to use a resin that does not contain a component that exhibits liquid repellency, such as silicon oil. As a result, the unrepelled melamine resin on the liquid-repellent layer 7 of the first laminated body 8 can be attached to the adhesion layer 4 at the time of thermal pressure transfer, and the whitening of the liquid-repellent layer 7 due to the unrepelled melamine resin can be prevented. can. As the resin that does not contain a component that exhibits liquid repellency, a resin in which the surface 4a of the adhesion layer 4 opposite to the transfer layer 3 has a contact angle with pure water of 90 degrees or less is preferable, and 60 degrees or less. The resin is more preferable, and the resin having a temperature of 30 degrees or less is most preferable.
The adhesion layer 4 is bonded to the pattern layer 6 (described later) of the first laminated body 8 but not to the liquid repellent layer 7 (described later) by thermal pressure transfer during the production of the melamine decorative plate 12. Has properties.
[0018]
(How to use the transfer sheet)
Next, a method of using the transfer sheet 1 according to the present embodiment will be described. FIG. 2 is a diagram for explaining a method of manufacturing a melamine decorative board 12 using the transfer sheet 1.
First, as shown in FIG. 2A, a first laminated body 8 in which the pattern layer 6 and the liquid-repellent layer 7 are laminated in this order is formed on one surface 5a side of the core layer 5. The liquid-repellent layer 7 is partially provided on one surface 5a of the core layer 5 to impart a gloss difference between a portion where the liquid-repellent layer 7 is present and a portion where the liquid-repellent layer 7 is not present.
[0019]
Here, as the core layer 5, for example, a phenol resin-impregnated paper or a laminate thereof can be used. The phenol resin impregnated paper is obtained, for example, by impregnating kraft paper with a resin containing a phenol resin as a main component and drying it. Further, as the core layer 5, a glass cloth or a glass non-woven fabric may be used, or a prepreg using a glass cloth or a glass non-woven fabric as a base material may be used. The prepreg can be obtained, for example, by impregnating a glass cloth or a glass non-woven fabric with a resin composition containing a thermoplastic resin, a thermosetting resin and the like.
The pattern layer 6 is a layer for imparting a design with a pattern to the melamine decorative board 12. As the pattern, for example, a wood grain pattern can be adopted. The pattern layer 6 can be provided by a known printing method. As the printing ink, a water-based ink is preferable from the viewpoint of resin impregnation suitability.
[0020]
The liquid-repellent layer 7 is a layer for imparting a design due to gloss difference to the melamine decorative board 12. As the gloss difference, for example, the gloss difference of the conduit pattern synchronized with the wood grain pattern of the pattern layer 6 can be adopted. As the resin constituting the liquid-repellent layer 7, for example, a heat-curable resin having a urethane bond such as a two-component curable urethane resin or a curable resin such as an ionized radiation curable resin can be used. Examples of the curable resin include melamine-based resin, epoxy-based resin, urea-based resin, phenol-based resin, unsaturated polyester-based resin, diallyl phthalate-based resin, benzoguanamine-based resin, urethane-based resin, aminoalkide-based resin, and silicone-based resin. Thermo-curable resin such as resin; ionization radiation curable resin such as (meth) acrylate-based resin and unsaturated polyester-based resin can be adopted.
[0021] Subsequently, the formed first laminated body 8 is immersed in an aqueous melamine resin solution, and then the transfer sheet 1 is laminated on the surface 8a on the liquid repellent layer 7 side of the first laminated body 8 to form the second laminated body 9. do. At that time, the repellent residue of the aqueous melamine resin solution remaining on the liquid-repellent layer 7 is removed by the adhesion layer 4 of the transfer sheet 1. Subsequently, as shown in FIG. 2B, the formed second laminated body 9 is sandwiched between the two mirror surface plates 10 and 11, and the second laminated body 9 is pressurized and heated to form a core layer. The uncured product of the aqueous melamine resin solution contained in 5 is cured (thermal pressure transfer). By thermal pressure transfer, the transfer layer 3 of the transfer sheet 1 is bonded to the pattern layer 6 (hereinafter, also referred to as “cured melamine resin layer 6”) via the adhesion layer 4. The portion of the pattern layer 6 where the liquid repellent layer 7 is provided is not joined to the adhesion layer 4.
[0022]
Subsequently, as shown in FIG. 2 (c), the base material layer 2 is peeled off from the first laminated body 8. When the base material layer 2 is peeled off from the first laminated body 8, the portion of the transfer layer 3 and the adhesive layer 4 bonded to the cured melamine resin layer 6 remains on the first laminated body 8 side. As a result, the surface 3b on the base material layer 2 side of the transfer layer 3 is exposed, and the surface of the melamine decorative plate 12 is formed on the exposed surface 3b. On the other hand, of the transfer layer 3 and the adhesion layer 4, the portion not bonded to the cured melamine resin layer 6, that is, the portion in contact with the liquid repellent layer 7, remains on the base material layer 2 side. As a result, the liquid-repellent layer 7 is exposed, the surface of the melamine decorative plate 12 is formed by the exposed liquid-repellent layer 7, and a design is imparted by the gloss difference between the portion where the liquid-repellent layer 7 is present and the portion where the liquid-repellent layer 7 is not present. Subsequently, the first laminated body 8 after peeling is irradiated with ionizing radiation to cure the ionizing radiation curable resin of the transfer layer 3, and the melamine decorative plate 12 is completed.
[0023]
As described above, in the transfer sheet 1 according to the present embodiment, since the resin constituting the transfer layer 3 is an uncured ionizing radiation curable resin, the flexibility of the transfer layer 3 can be improved during the execution of thermal pressure transfer. It is possible to provide a transfer sheet 1 capable of preventing film cracking of the transfer layer 3 due to thermal pressure transfer.
Further, since the in-layer strength of the transfer layer 3 is weakened, when the base material layer 2 is peeled from the first laminated body 8, the transfer layer 3 is torn along the outer edge of the liquid repellent layer 7 of the first laminated body 8. The transfer of the transfer layer 3 onto the liquid-repellent layer 7 can be prevented, and the transfer layer 3 can be selectively transferred to adjust the gloss by the liquid-repellent layer 7.
[0024]
By the way, when the transfer layer 3 contains the ionized radiation curable resin after curing, the strength in the layer of the transfer layer 3 is strong, so that when the base material layer 2 is peeled from the first laminated body 8, the transfer layer 3 is used. The transfer layer 3 is also transferred onto the liquid-repellent layer 7, and the transfer layer 3 cannot be selectively transferred, making it difficult to adjust the gloss.
Further, in the transfer sheet 1 according to the present embodiment, the resin constituting the adhesion layer 4 is a heat-curable resin that does not contain a component that exhibits liquid repellency. Therefore, for example, by bringing the adhesive layer 4 into contact with the liquid-repellent layer 7 at the time of manufacturing the melamine decorative plate 12, the adhesive layer 4 can absorb the repellent residue of the aqueous melamine resin liquid remaining on the liquid-repellent layer 7. Whitening of the melamine decorative board 12 can be prevented. Further, the transfer layer 3 can be appropriately transferred to a place on the surface of the first laminated body 8 where the liquid repellent layer 7 does not exist.
[0025]
By the way, when the adhesion layer 4 contains a thermosetting resin containing a component that develops liquid repellency, the repellent residue of the aqueous melamine resin liquid remaining on the liquid repellency layer 7 adheres to the melamine decorative plate 12 during production. It is not absorbed by layer 4, the repellent residue is not removed, and whitening occurs on the melamine veneer 12. Further, the transfer layer 3 is not properly transferred to a portion on the surface of the first laminated body 8 where the liquid repellent layer 7 does not exist.
Further, in the transfer sheet 1 according to the present embodiment, the ionizing radiation curable resin is at least one of an ultraviolet curable resin and an electron beam curable resin. Therefore, for example, at the time of manufacturing the melamine decorative board 12, the transfer layer 3 is irradiated with ultraviolet rays or electron beams after the thermal pressure transfer to prevent the film cracking of the transfer layer 3 due to the thermal pressure transfer and to prevent the melamine decorative board 12 from cracking. The strength can be improved.
[0026]
Further, in the method for producing the melamine decorative board 12 according to the present embodiment, the first laminated body 8 having the core layer 5 and the liquid repellent layer 7 partially provided on one surface 5a side of the core layer 5 is water-based. The core layer 5 is formed by immersing the first laminated body 8 in a melamine resin solution and pressurizing and heating the second laminated body 9 formed by laminating the transfer sheet 1 on the surface of the first laminated body 8 on the liquid-repellent layer 7 side. In the step of curing the uncured product of the aqueous melamine resin solution containing, the base material layer 2 of the transfer sheet 1 is peeled off from the first laminated body 8, and a part of the transfer layer 3 of the transfer sheet 1 is made into the first laminated body 8. The step of transferring, the step of irradiating the first laminated body 8 with ionizing radiation to cure the ionizing radiation curable resin of the transfer layer 3 was included. Therefore, it is possible to easily obtain the melamine decorative board 12 to which the gloss is selectively adjusted. Further, it is possible to obtain a melamine decorative plate 12 which is excellent in easy sweeping property, scratch resistance and fingerprint resistance and has a feeling of touch.
[0027]
(Example)
Hereinafter, examples and comparative examples of the transfer sheet 1 according to the embodiment of the present invention will be described. The present invention is not limited to the following examples.
[0028]
(Example 1)
First, as the base material layer 2, a raw fabric in which a polypropylene resin was laminated on one side of a thin leaf paper was prepared. The basis weight of the thin leaf paper was 40 g / m 2. The thickness of polypropylene was 16 μm. The surface gloss value of the original fabric was 1.0 (measured by a 60 ° gloss meter manufactured by HORIBA). Subsequently, a one-component curable ultraviolet curable resin having a tack-free property only by heat drying was applied on the surface of the base material layer 2 on the polypropylene resin side to form the transfer layer 3. The amount of the ultraviolet curable resin applied after drying was 6 g / m 2. Subsequently, a urethane resin containing no silicon oil was applied onto one surface 3a of the transfer layer 3 to form the adhesion layer 4. It should be noted that this urethane resin does not contain silicon oil as a component that is usually contained in order to exhibit liquid repellency, and naturally does not contain a component that exhibits liquid repellency other than silicon oil. It is a resin. The coating amount of the urethane resin after drying was 2 g / m 2. As a result, the transfer sheet 1 of Example 1 was produced.
[0029]
The coating of the ultraviolet curable resin and urethane resin was performed using a gravure seven-color printing machine for manufacturing decorative sheets. The printing speed was 100 m / min. The drying conditions are as follows: each layer is dried at 100 ° C., and after coating the entire layer, the after-drying zone is divided into two zones of 5 m each, and the layers are dried at 120 ° C. and 180 ° C. in order. , The resin was sufficiently dried.
[0030]
Subsequently, the first laminated body 8 was immersed in an aqueous melamine resin solution, and the first laminated body 8 immersed in the aqueous melamine resin solution and the produced transfer sheet 1 were superposed to form a second laminated body 9. .. Subsequently, the formed second laminated body 9 was sandwiched between the two mirror surface plates 10 and 11, and the second laminated body 9 was pressurized and heated (thermal pressure transfer). The hot pressure transfer was performed using a hot press machine under the conditions of a pressure of 100 kg / cm 2, a molding temperature of 160 ° C., and a heating and pressurizing time of 10 minutes. Subsequently, after the base material layer 2 was peeled from the first laminated body 8, the peeled first laminated body 8 was irradiated with ionizing radiation to cure the ionized radiation curable resin of the transfer layer 3. As a result, the melamine decorative board 12 of Example 1 was produced.
Here, the pattern layer 6 of the first laminated body 8 has a wood grain pattern, and the liquid repellent layer 7 has a conduit pattern.
[0031]
(Comparative Example 1)
In Comparative Example 1, the ultraviolet curable resin of the transfer layer 3 was cured before thermal pressure transfer. The transfer sheet 1 and the melamine decorative board 12 of Comparative Example 1 were produced in the same manner as in Example 1 except for the above.
(Comparative Example 2)
In Comparative Example 2, a urethane resin containing silicon oil was used as the material of the adhesion layer 4. The transfer sheet 1 and the melamine decorative board 12 of Comparative Example 2 were produced in the same manner as in Example 1 except for the above.
(Comparative Example 3)
In Comparative Example 3, a shaping sheet is used instead of the transfer sheet 1, and the shaping sheet is pressed against the surface of the first laminated body 8 by thermal pressure transfer, whereby the shaping sheet is transferred to the surface of the first laminated body 8. The surface pattern was transferred and the shaped sheet was peeled off to prepare the transfer sheet 1 and the melamine decorative board 12 of Comparative Example 3.
[0032]
(Performance evaluation)
The following performance evaluations were performed on the melamine decorative boards 12 of Example 1, Comparative Examples 1, 2, and 3.
(Evaluation of design feeling)
In the design feeling evaluation, the design of the melamine decorative board 12 was visually evaluated. In particular, we focused on the whitening of the conduit pattern. The number of judges was 10. Then, the case where the number of judges who judge that the design of the melamine decorative board 12 is good is 0 is regarded as a failing "x", and the case where the number of judges is 1 to 6 is regarded as a failing "△", and the number is 7 to 9. The case was evaluated as "○", and the case of 10 people was evaluated as "◎".
(Evaluation results)
The evaluation results are shown in Table 1.
[0033]
[table 1]

[0034]
As shown in Table 1 above, in the melamine decorative board 12 of Example 1, the evaluation result of "design feeling evaluation" was "◎". Specifically, in Example 1, there was no whitening, there was a selective gloss difference, and a three-dimensional feeling and a shining feeling of wood grain could be felt, and the “design feeling evaluation” was “◎”.
[0035]
On the other hand, in the melamine decorative plate 12 of Comparative Example 1, since the ultraviolet curable resin of the transfer layer 3 was cured before the thermal pressure transfer, the transfer layer 3 was cracked during the thermal pressure transfer, and the melamine decorative plate 12 as a whole. The "design feeling evaluation" was rejected as "x". Further, in the melamine decorative plate 12 of Comparative Example 2, since the material of the adhesion layer 4 was a urethane resin containing silicon oil, the water-based melamine resin liquid was left behind on the liquid-repellent layer 7, and the water-based melamine resin left behind. Whitening occurred with the liquid, and the transfer layer 3 was not transferred to the first laminated body 8 even in a place where the liquid-repellent layer 7 was not present, and the "design feeling evaluation" was "x". Further, in the melamine decorative plate 12 of Comparative Example 3, since the surface pattern is transferred by using the shaping sheet instead of the transfer sheet 1, whitening occurs due to the repelling residue of the aqueous melamine resin liquid on the liquid repellent layer 7, and " "Design feeling evaluation" became "△".
[0036]
Therefore, it was confirmed that the transfer sheet 1 of Example 1 can prevent the film cracking of the transfer layer 3 due to thermal pressure transfer, unlike the transfer sheet 1 of Comparative Example 1. Further, unlike the transfer sheets 1 of Comparative Examples 2 and 3, the transfer sheet 1 of Example 1 can remove the repellent residue of the aqueous melamine resin solution remaining on the liquid-repellent layer 7, and prevents the melamine decorative plate 12 from whitening. It was confirmed that it could be done.
Description of the sign
[0037]
1 ... Transfer sheet, 2 ... Base material layer, 3 ... Transfer layer, 4 ... Adhesion layer, 5 ... Base paper, 6 ... Pattern layer, 7 ... Liquid repellent layer, 8 ... First laminated body, 9 ... Second laminated body 10 ... mirror plate, 11 ... mirror plate, 12 ... melamine veneer
The scope of the claims
[Claim 1]
With the base material layer
The transfer layer provided on one surface side of the base material layer and
A close contact layer provided on the surface side of the transfer layer opposite to the base material layer is provided.
The resin constituting the transfer layer is an uncured ionizing radiation curable resin.
The resin constituting the adhesion layer is a transfer sheet characterized by being a heat-curable resin containing no component that exhibits liquid repellency.
[Claim 2]
The transfer sheet according to claim 1, wherein the ionizing radiation curable resin is at least one of an ultraviolet curable resin and an electron beam curable resin.
[Claim 3]
A method for manufacturing a melamine decorative board using the transfer sheet according to claim 1 or 2.
The liquid-repellent layer of the first laminated body obtained by immersing a first laminated body having a core layer and a liquid-repellent layer partially provided on one surface side of the core layer in an aqueous melamine resin solution. A step of applying pressure and heating to a second laminated body formed by laminating the transfer sheet on the side surface to cure an uncured product of the aqueous melamine resin solution contained in the core layer.
A step of peeling the base material layer of the transfer sheet from the first laminated body and transferring a part of the transfer layer of the transfer sheet to the first laminated body.
A method for producing a melamine decorative board, which comprises a step of irradiating the first laminated body with ionizing radiation to cure the ionized radiation curable resin of the transfer layer.