JP5517643B2 - Melamine decorative board and method for producing the same - Google Patents

Melamine decorative board and method for producing the same Download PDF

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JP5517643B2
JP5517643B2 JP2010014157A JP2010014157A JP5517643B2 JP 5517643 B2 JP5517643 B2 JP 5517643B2 JP 2010014157 A JP2010014157 A JP 2010014157A JP 2010014157 A JP2010014157 A JP 2010014157A JP 5517643 B2 JP5517643 B2 JP 5517643B2
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広典 松原
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イビデン建装 株式会社
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本発明は、テーブル、カウンター等の家具、扉等の建具などに使用され、指紋等の油汚れが目立ちにくいメラミン化粧板及びその製造方法に関する。   The present invention relates to a melamine decorative board which is used for furniture such as a table and a counter, a fitting such as a door, and the like, and oil stains such as fingerprints are hardly noticeable, and a manufacturing method thereof.

メラミン化粧板は、強度、硬さ、耐熱性等の物性に優れていることから、テーブル、カウンター等の材料として好適に用いられている。一般にメラミン化粧板は、化粧用パターン原紙にメラミン−ホルムアルデヒド樹脂を主成分とする樹脂液を含浸、乾燥させたメラミン樹脂含浸パターン紙と、クラフト紙にフェノール−ホルムアルデヒド樹脂を主成分とする樹脂液を含浸、乾燥させたフェノール樹脂含浸コア紙とを積層し、プレス機で加圧、加熱することにより製造される。このメラミン化粧板の表面には、人の手が触れたときに指紋等の油汚れが付着しやすいという欠点があった。   A melamine decorative board is suitably used as a material for a table, a counter, and the like because it has excellent physical properties such as strength, hardness, and heat resistance. In general, a melamine decorative board is composed of a melamine resin-impregnated pattern paper impregnated and dried with a resin liquid mainly composed of melamine-formaldehyde resin on a decorative pattern base paper, and a resin liquid mainly composed of phenol-formaldehyde resin on kraft paper. It is manufactured by laminating impregnated and dried phenol resin-impregnated core paper, and pressurizing and heating with a press. The surface of this melamine decorative board has a drawback that oil stains such as fingerprints are easily attached when touched by a human hand.

そこで、そのような油汚れを目立たないようにするために、表面に撥水撥油性を有する低屈折率層を形成したメラミン化粧板が提案されている(特許文献1を参照)。すなわち、撥水撥油性を有する低屈折率層は、水接触角が90°以上でオレイン酸接触角が45°以上のものである。具体的には、フッ素樹脂又はアクリル樹脂と、シロキサンとがグラフト化されたシロキサングラフト型ポリマーを主成分とするものである。   Therefore, a melamine decorative board is proposed in which a low refractive index layer having water and oil repellency is formed on the surface in order to make such oil stains inconspicuous (see Patent Document 1). That is, the low refractive index layer having water and oil repellency has a water contact angle of 90 ° or more and an oleic acid contact angle of 45 ° or more. Specifically, the main component is a siloxane graft polymer in which a fluororesin or an acrylic resin and siloxane are grafted.

しかしながら、メラミン化粧板表面に撥水撥油性を有する低屈折率層を形成した場合には、指紋等の油汚れが付着し難くなる一方、メラミン化粧板の表面が滑りやすくなる。そのため、メラミン化粧板をテーブル、カウンター等に使用したときには、メラミン化粧板上に置いたものが簡単に滑り、取扱性が悪いという問題があった。   However, when a low refractive index layer having water and oil repellency is formed on the surface of the melamine decorative board, oil stains such as fingerprints are difficult to adhere, while the surface of the melamine decorative board becomes slippery. Therefore, when a melamine decorative board is used for a table, a counter, etc., the thing put on the melamine decorative board slips easily and there existed a problem that handling property was bad.

さらに、油汚れを目立たないようにするために、転写シートを用いて表面に低屈折率層を形成したメラミン化粧板が提案されている(特許文献2を参照)。すなわち、そのメラミン化粧板は、オルガノシリカゾルとシロキサングラフト型ポリマーとを含む組成物が基材上に配置された転写シートを用い、その転写シートをメラミン樹脂含浸紙に積層して熱圧成形し、転写操作を行うことにより、表面に低屈折率層が設けられたものである。   Furthermore, a melamine decorative board in which a low refractive index layer is formed on the surface using a transfer sheet has been proposed in order to prevent oil stains from being noticeable (see Patent Document 2). That is, the decorative melamine board uses a transfer sheet in which a composition containing an organosilica sol and a siloxane graft type polymer is disposed on a substrate, the transfer sheet is laminated on a melamine resin-impregnated paper, and is hot-pressed, A low refractive index layer is provided on the surface by performing a transfer operation.

しかしながら、得られる低屈折率層は屈折率が低いが、それだけでは表面に付着した指紋等の油汚れを目立ち難くするには不十分である。加えて、低屈折率層の表面にはオルガノシリカゾルに基づいてナノメートルサイズの凹凸が形成されるが、その凹凸により指紋等の油汚れが付着する面積を十分に減少させることはできない。このため、メラミン化粧板表面に付着した油汚れを目立ち難くすることは依然として難しいという問題があった。   However, although the obtained low refractive index layer has a low refractive index, it is not sufficient to make oil stains such as fingerprints attached to the surface less noticeable. In addition, although nanometer-sized irregularities are formed on the surface of the low refractive index layer based on the organosilica sol, the area to which oil stains such as fingerprints adhere cannot be sufficiently reduced due to the irregularities. For this reason, there has been a problem that it is still difficult to make oil stains adhering to the melamine decorative board surface inconspicuous.

特開2009−34984号公報JP 2009-34984 A 特開2009−52019号公報JP 2009-52019 A

そこで、本発明の目的とするところは、表面が滑りやすくなることなく、指紋等の油汚れが目立ち難いメラミン化粧板及びそのようなメラミン化粧板を効率良く製造することができるメラミン化粧板の製造方法を提供することにある。   Therefore, an object of the present invention is to produce a melamine decorative board that is less prone to oil stains such as fingerprints without making the surface slippery, and a melamine decorative board that can efficiently produce such a melamine decorative board. It is to provide a method.

上記目的を達成するために、請求項1に記載の発明のメラミン化粧板は、メラミン化粧板表面に平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面が形成され、該凹凸面上に平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層が形成されていて、メラミン化粧板の表面はミクロンメートルサイズの凹凸面が形成され、その凹凸面上にナノメートルサイズの微細な凹凸が形成された二重構造となっていることを特徴とする。 In order to achieve the above-mentioned object, the melamine decorative board according to the first aspect of the present invention has an uneven surface based on silica particles having an average particle diameter of 0.1 to 2 μm formed on the surface of the melamine decorative board. A fine rough surface layer containing silica fine particles having an average particle diameter of 1 to 60 nm is formed, and the surface of the melamine decorative board has a micrometer-size uneven surface, and the nanometer-size fine surface is formed on the uneven surface. It has a double structure in which irregularities are formed .

請求項2に記載の発明のメラミン化粧板は、請求項1に係る発明において、前記微細粗面層の厚みが1〜10μmであることを特徴とする。
請求項3に記載の発明のメラミン化粧板の製造方法は、平均粒子径が0.1〜2μmのシリカ粒子に基づく表面に凹凸面を有する粗面フィルム上に、バインダー中に平均粒子径が1〜60nmのシリカ微粒子を含有するコーティング液を塗布してコーティング層を形成した転写フィルムを、メラミン化粧板に対してコーティング層がメラミン化粧板側になるように積層した後、加熱プレス成形を行い、次いで転写フィルムのうち粗面フィルムを剥離してコーティング層をメラミン化粧板表面に転写し、メラミン化粧板表面にコーティング層が乾燥、固化されて平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層が形成され、メラミン化粧板の表面はミクロンメートルサイズの凹凸面が形成され、その凹凸面上にナノメートルサイズの微細な凹凸が形成された二重構造となっているメラミン化粧板を製造することを特徴とする。
The decorative melamine board according to claim 2 is characterized in that, in the invention according to claim 1, the fine rough surface layer has a thickness of 1 to 10 μm.
Method for producing a melamine decorative board of the invention described in claim 3, the rough surface on the film having an irregular surface to the surface average particle diameter flat based on silica particles 0.1-2 .mu.m, an average particle diameter in the binder A transfer film formed by applying a coating solution containing silica fine particles of 1 to 60 nm to form a coating layer is laminated on the melamine decorative board so that the coating layer is on the melamine decorative board side, and then subjected to hot press molding. Then, the rough film of the transfer film is peeled off to transfer the coating layer to the surface of the melamine decorative board, and the coating layer is dried and solidified on the surface of the melamine decorative board , and the fine particles containing silica fine particles having an average particle diameter of 1 to 60 nm rough surface layer is formed, the surface of the melamine decorative plate is formed uneven surface of micrometer size, nanometer-sized on its uneven surface Characterized in that the production of melamine decorative plate has a double structure fine irregularities are formed.

請求項4に記載の発明のメラミン化粧板の製造方法は、請求項3に係る発明において、前記平均粒子径が0.1〜2μmのシリカ粒子は、粗面フィルム中に0.1〜10質量%分散されていることを特徴とする。   The method for producing a melamine decorative board according to claim 4 is the invention according to claim 3, wherein the silica particles having an average particle diameter of 0.1 to 2 μm are 0.1 to 10 mass in the rough surface film. % Dispersed.

請求項5に記載の発明のメラミン化粧板の製造方法は、請求項3又は請求項4に係る発明において、前記コーティング液は、平均粒子径が1〜60nmのシリカ微粒子がバインダー樹脂に分散されて形成され、平均粒子径が1〜60nmのシリカ微粒子100質量部に対するバインダー樹脂の割合が10〜150質量部であることを特徴とする。   The method for producing a melamine decorative board according to claim 5 is the invention according to claim 3 or claim 4, wherein the coating liquid comprises silica fine particles having an average particle diameter of 1 to 60 nm dispersed in a binder resin. The ratio of the binder resin to 100 parts by mass of the silica fine particles formed and having an average particle diameter of 1 to 60 nm is 10 to 150 parts by mass.

本発明によれば、次のような効果を発揮することができる。
本発明のメラミン化粧板は、表面に平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面が形成され、該凹凸面上に平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層が形成されている。このため、メラミン化粧板の表面にはミクロンメートルサイズの凹凸面が形成され、その凹凸面上にナノメートルサイズの微細な凹凸が形成された二重構造となっている。そして、指紋等の油汚れはその微細な凹凸の最も高い凸部表面に付着するため、油汚れが付着する面積を減少させることができる。なお、凹凸面及び微細粗面層の表面に形成される凹凸は微細なものであるため、表面の滑りやすさにはほとんど影響を与えない。
According to the present invention, the following effects can be exhibited.
The melamine decorative board of the present invention has a fine rough surface having a rough surface based on silica particles having an average particle diameter of 0.1 to 2 μm formed on the surface, and silica fine particles having an average particle diameter of 1 to 60 nm on the rough surface. A layer is formed. For this reason, a micrometer-sized uneven surface is formed on the surface of the melamine decorative board, and has a double structure in which nanometer-sized fine unevenness is formed on the uneven surface. And since oil stains, such as a fingerprint, adhere to the highest convex surface of the fine unevenness, the area where oil stains adhere can be reduced. In addition, since the unevenness | corrugation formed in the surface of an uneven surface and a fine rough surface layer is fine, it has little influence on the surface slipperiness.

従って、メラミン化粧板は、表面が滑りやすくなることなく、指紋等の油汚れを目立ち難くすることができる。   Therefore, the melamine decorative board can make the oil stains such as fingerprints inconspicuous without the surface becoming slippery.

(a)は本発明の実施形態におけるメラミン化粧板の構成を模式的に示す概略断面図、(b)はメラミン化粧板の表面を拡大して示す部分拡大断面図。(A) is a schematic sectional drawing which shows typically the structure of the melamine decorative board in embodiment of this invention, (b) is the elements on larger scale which expand and show the surface of a melamine decorative board. (a)は実施形態の樹脂含浸紙を模式的に示す概略断面図、(b)は転写フィルムを示す概略断面図、(c)は樹脂含浸紙上に転写フィルムを積層した状態を示す概略断面図、(d)は転写フィルムの表面を拡大して示す部分拡大断面図。(A) is a schematic sectional view schematically showing the resin-impregnated paper of the embodiment, (b) is a schematic sectional view showing the transfer film, and (c) is a schematic sectional view showing a state in which the transfer film is laminated on the resin-impregnated paper. (D) is a partial expanded sectional view which expands and shows the surface of a transfer film.

以下、本発明を具体化した実施形態を図1及び図2に基づいて詳細に説明する。
メラミン化粧板は、表面に平均粒子径が0.1〜2μmのシリカ(二酸化ケイ素、SiO)粒子に基づく凹凸面が形成され、その凹凸面上に平均粒子径が1〜60nmのシリカ微粒子に基づく微細粗面層が形成されて構成されている。具体的には、図1(a)に示すように、メラミン化粧板10は、5枚のフェノール樹脂含浸紙11上に1枚のメラミン樹脂含浸紙12が積層されて樹脂含浸紙13が構成され、この樹脂含浸紙13上に微細粗面層14が形成されて構成されている。図1(b)の拡大断面図に示すように、メラミン樹脂含浸紙12の表面には平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面15が形成され、該凹凸面15上に前記微細粗面層14が形成されている。
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.
The melamine decorative board has an irregular surface based on silica (silicon dioxide, SiO 2 ) particles having an average particle diameter of 0.1 to 2 μm on the surface, and silica fine particles having an average particle diameter of 1 to 60 nm are formed on the irregular surface. A fine rough surface layer is formed and formed. Specifically, as shown in FIG. 1 (a), a melamine decorative board 10 includes a resin impregnated paper 13 formed by laminating one melamine resin impregnated paper 12 on five phenol resin impregnated papers 11. A fine rough surface layer 14 is formed on the resin-impregnated paper 13. As shown in the enlarged sectional view of FIG. 1B, a concavo-convex surface 15 based on silica particles having an average particle diameter of 0.1 to 2 μm is formed on the surface of the melamine resin-impregnated paper 12, and on the concavo-convex surface 15. The fine rough surface layer 14 is formed.

シリカ微粒子の平均粒子径は1〜60nmであり、好ましくは10〜20nmである。シリカ微粒子の平均粒子径が1nmを下回る場合には、後述するバインダーと混合してコーティング液を調製したときシリカ微粒子の凝集が起こってシリカ微粒子の分散が安定しなくなる。その一方、60nmを上回る場合には、指紋等の油汚れに対する接触面積が増え、油汚れを目立たなくする効果が低下すると共に、微細粗面層14表面の微細な凹凸が粗くなるため乱反射により白化したように見える。   The average particle diameter of the silica fine particles is 1 to 60 nm, preferably 10 to 20 nm. When the average particle diameter of the silica fine particles is less than 1 nm, when the coating liquid is prepared by mixing with a binder described later, the silica fine particles are aggregated and the dispersion of the silica fine particles becomes unstable. On the other hand, when it exceeds 60 nm, the contact area with oil stains such as fingerprints increases, the effect of making the oil stains inconspicuous decreases, and the fine irregularities on the surface of the fine rough surface layer 14 become rough, so that whitening occurs due to irregular reflection Looks like.

前記微細粗面層14の厚みは1〜10μmであることが好ましい。この厚みが1μm未満の場合、微細粗面層14表面に形成される凹凸が微細になり過ぎて平滑面に近くなり、指紋等の油汚れを目立たなくすることが難しくなる。その一方、厚みが10μmを超える場合、微細粗面層14表面の微細な凹凸にむらが発生しやすくなる傾向を示す。   The thickness of the fine rough surface layer 14 is preferably 1 to 10 μm. When this thickness is less than 1 μm, the irregularities formed on the surface of the fine rough surface layer 14 become too fine and close to a smooth surface, making it difficult to make oil stains such as fingerprints inconspicuous. On the other hand, when the thickness exceeds 10 μm, the unevenness on the surface of the fine rough surface layer 14 tends to be uneven.

次に、メラミン化粧板10の製造方法について説明する。
まず、図2(a)に示すように、5枚のフェノール樹脂含浸紙11上に1枚のメラミン樹脂含浸紙12を積層して樹脂含浸紙13を調製する。フェノール樹脂含浸紙11及びメラミン樹脂含浸紙12は1枚又は複数枚が適宜選択して使用される。フェノール樹脂含浸紙11は、コア紙として坪量150〜250g/mのクラフト紙にフェノール樹脂を含浸率が45〜60%となるように含浸し、100〜140℃で乾燥させることにより製造される。
Next, the manufacturing method of the melamine decorative board 10 is demonstrated.
First, as shown in FIG. 2A, a resin-impregnated paper 13 is prepared by laminating one melamine resin-impregnated paper 12 on five phenol resin-impregnated papers 11. One or a plurality of the phenol resin-impregnated paper 11 and the melamine resin-impregnated paper 12 are appropriately selected and used. The phenol resin impregnated paper 11 is produced by impregnating a kraft paper having a basis weight of 150 to 250 g / m 2 as a core paper with a phenol resin so that the impregnation ratio is 45 to 60% and drying at 100 to 140 ° C. The

メラミン樹脂含浸紙12は、パターン紙として坪量60〜160g/mのチタン紙にメラミン樹脂を含浸率が70〜140%となるように含浸し、100〜140℃で乾燥させることにより製造される。なお、フェノール樹脂含浸紙11及びメラミン樹脂含浸紙12における含浸率は、次式で求められる。 The melamine resin-impregnated paper 12 is produced by impregnating titanium paper having a basis weight of 60 to 160 g / m 2 as a pattern paper with a melamine resin so that the impregnation ratio is 70 to 140% and drying at 100 to 140 ° C. The In addition, the impregnation rate in the phenol resin impregnated paper 11 and the melamine resin impregnated paper 12 is obtained by the following equation.

含浸率(%)=〔(含浸後の含浸紙の質量)−(含浸前の原紙の質量)〕×100/(含浸前の原紙の質量)
次いで、図2(b)に示すように、表面に凹凸を有する粗面フィルム16を用意し、その粗面フィルム16上に、バインダー中に平均粒子径が1〜60nmのシリカ微粒子を含有するコーティング液を塗布してコーティング層17を形成した転写フィルム18を調製する。上記粗面フィルム16は、樹脂フィルムに平均粒子径が0.1〜2μmのシリカ粒子が分散されて構成されている。このため、図2(d)の拡大断面図に示すように、粗面フィルム16表面にはそのシリカ粒子に基づく凹凸を有する凹凸面15が形成され、該凹凸面15上にコーティング層17が設けられている。このように樹脂フィルムにシリカ粒子が分散されて構成されていることにより、加熱プレス成形時に粗面フィルム16表面の凹凸が維持され、メラミン化粧板10表面に凹凸を形成することができる。
Impregnation rate (%) = [(mass of impregnated paper after impregnation) − (mass of base paper before impregnation)] × 100 / (mass of base paper before impregnation)
Next, as shown in FIG. 2 (b), a rough surface film 16 having irregularities on the surface is prepared, and the coating containing silica fine particles having an average particle diameter of 1 to 60 nm in the binder on the rough surface film 16. A transfer film 18 on which the coating layer 17 is formed by applying the liquid is prepared. The rough surface film 16 is formed by dispersing silica particles having an average particle diameter of 0.1 to 2 μm in a resin film. For this reason, as shown in the enlarged cross-sectional view of FIG. 2D, an uneven surface 15 having unevenness based on the silica particles is formed on the surface of the rough film 16, and a coating layer 17 is provided on the uneven surface 15. It has been. As described above, the silica film is dispersed in the resin film, whereby the unevenness on the surface of the rough film 16 is maintained during hot press molding, and the unevenness can be formed on the surface of the decorative melamine board 10.

粗面フィルム16を、係るシリカを用いることなく、エンボス加工により形成しようとすると、加熱プレス成形時に樹脂フィルムが平滑に伸ばされるためメラミン化粧板10表面に凹凸が形成されなくなる。前記樹脂フィルムとしては、二軸延伸ポリプロピレンフィルム(OPPフィルム)、ポリエステルフィルム(PETフィルム等)、ポリエチレンフィルム(PEフィルム)等が用いられる。   If an attempt is made to form the rough film 16 by embossing without using such silica, the resin film is stretched smoothly during hot press molding, so that unevenness is not formed on the surface of the melamine decorative board 10. As the resin film, a biaxially stretched polypropylene film (OPP film), a polyester film (PET film or the like), a polyethylene film (PE film) or the like is used.

前記コーティング液は、平均粒子径が1〜60nmのシリカ微粒子がバインダー樹脂に分散されて形成され、平均粒子径が1〜60nmのシリカ微粒子100質量部に対するバインダー樹脂の割合が10〜150質量部であることが好ましい。シリカ微粒子は、水性シリカゾルを水又はアルコールに分散させたコロイド溶液であることが望ましい。水性シリカゾルの水酸基はメラミン樹脂との相溶性が良く、メラミン化粧板10の品質が低下しない。逆に、疎水化処理したシリカゾルはメラミン樹脂との相溶性が悪く、メラミン化粧板10の品質が低下する。コロイド溶液中のシリカ微粒子の濃度は1〜40質量%であることが好ましい。この場合、コロイド溶液の安定性を良好に維持することができる。   The coating liquid is formed by dispersing silica fine particles having an average particle diameter of 1 to 60 nm in a binder resin, and the ratio of the binder resin to 10 parts by mass of the silica fine particles having an average particle diameter of 1 to 60 nm is 10 to 150 parts by mass. Preferably there is. The silica fine particles are desirably a colloidal solution in which an aqueous silica sol is dispersed in water or alcohol. The hydroxyl group of the aqueous silica sol has good compatibility with the melamine resin, and the quality of the melamine decorative board 10 does not deteriorate. Conversely, the hydrophobized silica sol has poor compatibility with the melamine resin, and the quality of the melamine decorative board 10 is lowered. The concentration of silica fine particles in the colloidal solution is preferably 1 to 40% by mass. In this case, the stability of the colloidal solution can be maintained well.

バインダー樹脂は、コーティング液を粗面フィルム16上に塗布する場合にシリカが脱落しないようにすると共に、メラミン樹脂との相溶性が良好なものが好ましい。そのようなバインダー樹脂としては、カゼイン樹脂、酢酸セルロース樹脂等が挙げられる。   It is preferable that the binder resin has good compatibility with the melamine resin while preventing the silica from dropping when the coating liquid is applied onto the rough surface film 16. Examples of such binder resins include casein resins and cellulose acetate resins.

シリカ微粒子100質量部に対するバインダー樹脂の割合が10質量部より少ない場合には、コーティング液を粗面フィルム16上に塗布したときシリカ微粒子が脱落するおそれがある。一方、その割合が150質量部より多い場合には、コーティング液を粗面フィルム16上に塗布したときバインダー樹脂が表面を覆うため、転写後に形成される微細粗面層14表面が平滑になりやすく、耐指紋性が低下する傾向を示す。   When the ratio of the binder resin to 100 parts by mass of the silica fine particles is less than 10 parts by mass, the silica fine particles may fall off when the coating liquid is applied on the rough surface film 16. On the other hand, when the ratio is more than 150 parts by mass, the surface of the fine rough surface layer 14 formed after transfer tends to be smooth because the binder resin covers the surface when the coating liquid is applied onto the rough surface film 16. The fingerprint resistance tends to decrease.

続いて、図2(c)に示すように、転写フィルム18を樹脂含浸紙13に対してコーティング層17が樹脂含浸紙13側になるように積層する。そして、その状態で加熱プレス成形を行い、その後図1(a)に示すように転写フィルム18のうち粗面フィルム16を剥離してコーティング層17を樹脂含浸紙13表面に転写する。加熱プレス成形における加熱温度は125〜150℃が好ましいと共に、圧力は4.9〜8.8MPaが好ましい。加熱プレス成形によって例えば厚み0.8〜1.2mmに成形される。このような操作を経て、表面にコーティング層17が乾燥、固化されて形成された微細粗面層14を有するメラミン化粧板10を製造することができる。   Subsequently, as shown in FIG. 2C, the transfer film 18 is laminated on the resin-impregnated paper 13 so that the coating layer 17 is on the resin-impregnated paper 13 side. Then, heat press molding is performed in this state, and then the rough film 16 is peeled from the transfer film 18 as shown in FIG. 1A to transfer the coating layer 17 onto the surface of the resin-impregnated paper 13. The heating temperature in the hot press molding is preferably 125 to 150 ° C., and the pressure is preferably 4.9 to 8.8 MPa. For example, it is molded to a thickness of 0.8 to 1.2 mm by hot press molding. Through such an operation, the melamine decorative board 10 having the fine rough surface layer 14 formed by drying and solidifying the coating layer 17 on the surface can be produced.

以上の実施形態により発揮される効果について以下にまとめて説明する。
(1) 本実施形態におけるメラミン化粧板10は、表面に平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面15が形成され、該凹凸面15上に平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層14が形成されている。このため、メラミン化粧板10の表面にはミクロンメートルサイズの凹凸面15が形成され、その凹凸面15上にナノメートルサイズの微細な凹凸が形成された二重構造となっている。そして、指紋等の油汚れはその微細な凹凸の最も高い凸部表面に付着するため、油汚れが付着する面積を低減させることができると共に、油汚れが付着する微細な点を減少させることができる。なお、凹凸面15及び微細粗面層14の表面に形成される凹凸は微細なものであるため、表面の滑りやすさにはほとんど影響しない。
The effects exhibited by the above embodiment will be described together below.
(1) As for the melamine decorative board 10 in this embodiment, the uneven surface 15 based on the silica particle whose average particle diameter is 0.1-2 micrometers is formed in the surface, and an average particle diameter is 1-60 nm on this uneven surface 15 A fine rough surface layer 14 containing silica fine particles is formed. For this reason, the uneven surface 15 of micrometer size is formed on the surface of the melamine decorative board 10, and it has a double structure in which fine unevenness of nanometer size is formed on the uneven surface 15. And since oil stains such as fingerprints adhere to the surface of the highest convex part of the fine irregularities, the area where oil stains adhere can be reduced and the fine spots where oil stains adhere can be reduced. it can. In addition, since the unevenness | corrugation formed in the surface of the uneven surface 15 and the fine rough surface layer 14 is fine, it hardly influences the slipperiness of the surface.

従って、メラミン化粧板10は、表面が滑りやすくなることなく、指紋等の油汚れを目立ち難くすることができる。よって、このメラミン化粧板10を、濃色のテーブル、カウンター、扉等の化粧材用途に好適に使用することができる。   Therefore, the melamine decorative board 10 can make the oil stains such as fingerprints inconspicuous without the surface becoming slippery. Therefore, this melamine decorative board 10 can be suitably used for decorative material applications such as dark-colored tables, counters, and doors.

(2) 微細粗面層14の厚みが1〜10μmであることにより、メラミン化粧板10の表面に微細粗面層14が十分に存在し、微細粗面層14の機能を有効に発揮することができる。   (2) When the thickness of the fine rough surface layer 14 is 1 to 10 μm, the fine rough surface layer 14 is sufficiently present on the surface of the melamine decorative board 10 and the function of the fine rough surface layer 14 is effectively exhibited. Can do.

(3) メラミン化粧板10は、転写フィルム18を用いた転写法により製造される。すなわち、表面に平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面15を有する粗面フィルム16上に、バインダー中に平均粒子径が1〜60nmのシリカ微粒子を含有するコーティング液を塗布してコーティング層17を形成した転写フィルム18を作製する。この転写フィルム18を樹脂含浸紙13に対してコーティング層17が樹脂含浸紙13側になるように積層した後、加熱プレス成形を行う。次いで、転写フィルム18のうち粗面フィルム16を剥離してコーティング層17を樹脂含浸紙13表面に転写し、表面に平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層14が形成されたメラミン化粧板10を製造する。   (3) The melamine decorative board 10 is manufactured by a transfer method using the transfer film 18. That is, a coating liquid containing silica fine particles having an average particle diameter of 1 to 60 nm in a binder is applied on the rough surface film 16 having an uneven surface 15 based on silica particles having an average particle diameter of 0.1 to 2 μm on the surface. Thus, the transfer film 18 on which the coating layer 17 is formed is produced. The transfer film 18 is laminated on the resin-impregnated paper 13 so that the coating layer 17 is on the resin-impregnated paper 13 side, and then hot press molding is performed. Next, the rough surface film 16 of the transfer film 18 is peeled off, and the coating layer 17 is transferred to the surface of the resin-impregnated paper 13 to form the fine rough surface layer 14 containing silica fine particles having an average particle diameter of 1 to 60 nm on the surface. The melamine decorative board 10 is manufactured.

従って、この製造方法によれば、転写法によりメラミン化粧板10の表面に凹凸面15及びその上に微細粗面層14を精度良く形成することができ、効率良く目的のメラミン化粧板10を調製することができる。   Therefore, according to this manufacturing method, the uneven surface 15 and the fine rough surface layer 14 can be accurately formed on the surface of the melamine decorative board 10 by the transfer method, and the target melamine decorative board 10 is efficiently prepared. can do.

(4) 前記平均粒子径が0.1〜2μmのシリカ粒子は、粗面フィルム16中に0.1〜10質量%分散されている。このため、転写フィルム18の表面、延いてはメラミン化粧板10表面にミクロンメートルサイズの凹凸面15を容易に形成することができる。   (4) Silica particles having an average particle diameter of 0.1 to 2 μm are dispersed in the rough film 16 in an amount of 0.1 to 10% by mass. For this reason, the uneven surface 15 having a micrometer size can be easily formed on the surface of the transfer film 18 and thus on the surface of the decorative melamine plate 10.

(5) コーティング液は、平均粒子径が1〜60nmのシリカ微粒子がバインダー樹脂に分散されて形成され、平均粒子径が1〜60nmのシリカ微粒子100質量部に対するバインダー樹脂の割合が10〜150質量部に設定されている。このため、コーティング液中のシリカ微粒子の含有量が十分に確保されると共に、コーティングに適正な粘性を得ることができる。   (5) The coating liquid is formed by dispersing silica fine particles having an average particle diameter of 1 to 60 nm in a binder resin, and the ratio of the binder resin to 10 parts by mass of silica fine particles having an average particle diameter of 1 to 60 nm is 10 to 150 masses. Is set in the department. For this reason, the content of the silica fine particles in the coating liquid is sufficiently ensured, and an appropriate viscosity for the coating can be obtained.

以下、実施例及び比較例を挙げて前記実施形態をさらに具体的に説明する。
<実施例1>
(転写フィルム18の作製)
平均粒子径10〜20nmのシリカ微粒子をメタノールに分散させたシリカゾル〔コロイド溶液、固形分30質量%、日産化学工業(株)製〕100質量部と、カゼイン樹脂〔固形分25質量%、DICグラフィックス(株)製〕50質量部とを混合してコーティング液を調製した。このコーティング液を水及びメタノールで希釈し、粘度が20〜30mPa・sになるように調整した。得られたコーティング液を、平均粒子径0.1〜2μmのシリカ粒子が分散された二軸延伸ポリプロピレンフィルム〔OPPフィルム、東レ(株)製のYM−17S〕の粗面(光沢度10度)に乾燥厚み(塗布厚)が1μmとなるように塗布し、熱風乾燥させて転写フィルム18を作製した。すなわち、図2(b)に示すように、得られた転写フィルム18は、粗面フィルム16上にコーティング層17が形成されている。
(フェノール樹脂含浸紙11の作製)
コア紙として坪量200g/mのクラフト紙にフェノール樹脂を含浸率が55%となるように含浸し、130℃で乾燥させることによりフェノール樹脂含浸紙11を作製した。
(メラミン樹脂含浸紙12の作製)
パターン紙として坪量100g/mのチタン紙にメラミン樹脂を含浸率が110%となるように含浸し、130℃で乾燥させることによりメラミン樹脂含浸紙12を作製した。
(メラミン化粧板10の調製)
図2(a)に示すように、メラミン化粧板10を構成する樹脂含浸紙13は、5枚のフェノール樹脂含浸紙11上に1枚のメラミン樹脂含浸紙12が積層されて構成されている。そして、図2(c)に示すように、前記転写フィルム18を、樹脂含浸紙13に対してコーティング層17が樹脂含浸紙13側になるように積層し、その状態で加熱プレス成形を行い、厚み1.2mmに形成した。加熱プレス成形では、加熱温度を135℃及び圧力を7.8MPaに設定した。その後、図1(a)に示すように、転写フィルム18の粗面フィルム16を剥離してコーティング層17を樹脂含浸紙13表面に転写し、表面に微細粗面層14が形成されたメラミン化粧板10を製造した。なお、微細粗面層14の厚みは、前記コーティング層17の厚みに相当する。
Hereinafter, the embodiment will be described more specifically with reference to examples and comparative examples.
<Example 1>
(Preparation of transfer film 18)
100 parts by mass of silica sol (colloid solution, solid content 30% by mass, manufactured by Nissan Chemical Industries, Ltd.) in which silica fine particles having an average particle size of 10 to 20 nm are dispersed in methanol, and casein resin (solid content 25% by mass, DIC graphic) The coating solution was prepared by mixing 50 parts by mass. This coating liquid was diluted with water and methanol and adjusted so that the viscosity was 20 to 30 mPa · s. The obtained coating liquid is a rough surface of a biaxially stretched polypropylene film [OPP film, YM-17S manufactured by Toray Industries, Inc.] in which silica particles having an average particle size of 0.1 to 2 μm are dispersed (glossiness 10 degrees). The transfer film 18 was prepared by coating the film with a dry thickness (coating thickness) of 1 μm and drying with hot air. That is, as shown in FIG. 2B, the obtained transfer film 18 has a coating layer 17 formed on the rough surface film 16.
(Preparation of phenol resin impregnated paper 11)
A kraft paper having a basis weight of 200 g / m 2 as core paper was impregnated with a phenol resin so that the impregnation rate was 55%, and dried at 130 ° C. to prepare a phenol resin-impregnated paper 11.
(Preparation of melamine resin impregnated paper 12)
A melamine resin-impregnated paper 12 was prepared by impregnating titanium paper having a basis weight of 100 g / m 2 as a pattern paper with a melamine resin impregnation rate of 110% and drying at 130 ° C.
(Preparation of melamine decorative board 10)
As shown in FIG. 2A, the resin-impregnated paper 13 constituting the melamine decorative board 10 is configured by laminating one sheet of melamine resin-impregnated paper 12 on five sheets of phenol resin-impregnated paper 11. Then, as shown in FIG. 2 (c), the transfer film 18 is laminated on the resin-impregnated paper 13 so that the coating layer 17 is on the resin-impregnated paper 13 side, and in that state, hot press molding is performed, The thickness was 1.2 mm. In the hot press molding, the heating temperature was set to 135 ° C. and the pressure was set to 7.8 MPa. Thereafter, as shown in FIG. 1A, the rough film 16 of the transfer film 18 is peeled off, the coating layer 17 is transferred to the surface of the resin-impregnated paper 13, and the fine rough surface layer 14 is formed on the surface. A plate 10 was produced. The thickness of the fine rough surface layer 14 corresponds to the thickness of the coating layer 17.

この微細粗面層14を有するメラミン化粧板10について、次に示す方法で外観及び耐指紋性を測定し、評価した。その結果を表1に示した。
(外観の評価方法)
表面に微細粗面層14が設けられたメラミン化粧板10を目視により観察し、下記の評価基準にて評価した。
About the melamine decorative board 10 which has this fine rough surface layer 14, the external appearance and fingerprint resistance were measured and evaluated by the method shown next. The results are shown in Table 1.
(Appearance evaluation method)
The melamine decorative board 10 provided with the fine rough surface layer 14 on the surface was visually observed and evaluated according to the following evaluation criteria.

◎:仕上がり良好、○:仕上がり若干白く見える、△:仕上がりが白く見える、×:仕上がりにむらがある。
(耐指紋性の評価方法)
メラミン化粧板10表面に実際に指紋をつけて、指紋がどれだけ目立つかを目視により下記の評価基準にて評価した。
A: Finished well, B: Finished slightly white, Δ: Finished white, ×: Uneven finish.
(Fingerprint resistance evaluation method)
A fingerprint was actually attached to the surface of the melamine decorative board 10, and how much the fingerprint was conspicuous was evaluated visually according to the following evaluation criteria.

○:指紋が目立たない、△:指紋が若干目立つ、×:指紋が目立つ。
<実施例2>
実施例1において、微細粗面層14の厚みを5μmとした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例3>
実施例1において、微細粗面層14の厚みを10μmとした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例4>
実施例1において、微細粗面層14の厚みを0.5μmとした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例5>
実施例1において、微細粗面層14の厚みを15μmとした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例6>
実施例1において、コーティング液を前記シリカゾル100質量部とカゼイン樹脂100質量部との混合物とした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例7>
実施例1において、コーティング液を前記シリカゾル100質量部とカゼイン樹脂150質量部との混合物とした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<実施例8>
実施例1において、コーティング液を前記シリカゾル100質量部とカゼイン樹脂10質量部との混合物とした以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<比較例1>
実施例1において、転写フィルム18として表面が平滑(光沢度140度)な二軸延伸ポリプロピレンフィルム(OPPフィルム)を使用した以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<比較例2>
実施例1において、転写フィルム18として表面が平滑なポリエチレンフィルム(PEフィルム)を使用した以外は同様に実施し、表面に微細粗面層14が形成されたメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<比較例3>
実施例1において、転写フィルム18を用いる転写操作を省略した以外は同様に実施し、表面が平滑なメラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
<比較例4>
実施例1において、コーティング層17が形成されていない転写フィルム18を用いた以外は同様に実施し、メラミン化粧板10を調製した。このメラミン化粧板10について、外観及び耐指紋性を実施例1と同様に測定し、その評価結果を表1に示した。
○: The fingerprint is inconspicuous, Δ: The fingerprint is slightly conspicuous, ×: The fingerprint is conspicuous.
<Example 2>
In Example 1, it carried out similarly except having made the thickness of the fine rough surface layer 14 into 5 micrometers, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 3>
In Example 1, it carried out similarly except having made the thickness of the fine rough surface layer 14 into 10 micrometers, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 4>
In Example 1, it carried out similarly except having made the thickness of the fine rough surface layer 14 into 0.5 micrometer, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 5>
In Example 1, it carried out similarly except having made the thickness of the fine rough surface layer 14 into 15 micrometers, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 6>
In Example 1, it carried out similarly except having made the coating liquid into the mixture of the said silica sol 100 mass part and 100 mass parts of casein resin, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 7>
In Example 1, it carried out similarly except having made the coating liquid into the mixture of the said silica sol 100 mass parts and 150 mass parts casein resin, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Example 8>
In Example 1, it carried out similarly except having made the coating liquid into the mixture of the said silica sol 100 mass part and 10 mass parts of casein resin, and prepared the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Comparative Example 1>
In Example 1, the same procedure was performed except that a biaxially stretched polypropylene film (OPP film) having a smooth surface (glossiness of 140 degrees) was used as the transfer film 18, and the melamine having the fine rough surface layer 14 formed on the surface. A decorative board 10 was prepared. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Comparative example 2>
In Example 1, it carried out similarly except having used the polyethylene film (PE film) with a smooth surface as the transfer film 18, and the melamine decorative board 10 in which the fine rough surface layer 14 was formed in the surface was prepared. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Comparative Example 3>
In Example 1, it carried out similarly except having omitted transfer operation using transfer film 18, and melamine decorative board 10 with the smooth surface was prepared. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.
<Comparative Example 4>
In Example 1, it implemented similarly except having used the transfer film 18 in which the coating layer 17 was not formed, and the melamine decorative board 10 was prepared. About this melamine decorative board 10, an external appearance and fingerprint resistance were measured like Example 1, and the evaluation result was shown in Table 1.

Figure 0005517643
表1に示したように、実施例1〜3及び実施例6〜8のメラミン化粧板10では、外観及び耐指紋性のいずれも良好であった。実施例4では、コーティング層17の塗布厚すなわち微細粗面層14の厚みが0.5μmという極薄い厚みに形成されたため、メラミン化粧板10の耐指紋性が低下する傾向を示した。さらに、実施例5では、微細粗面層14の厚みが15μmという非常に厚い厚みに形成されたため、メラミン化粧板10の外観が若干低下した。
Figure 0005517643
As shown in Table 1, in the melamine decorative board 10 of Examples 1 to 3 and Examples 6 to 8, both the appearance and the fingerprint resistance were good. In Example 4, since the coating thickness of the coating layer 17, that is, the thickness of the fine rough surface layer 14 was formed to an extremely thin thickness of 0.5 μm, the fingerprint resistance of the melamine decorative board 10 tended to decrease. Furthermore, in Example 5, since the thickness of the fine rough surface layer 14 was formed to a very large thickness of 15 μm, the appearance of the melamine decorative board 10 was slightly deteriorated.

これに対して、比較例1及び2では転写フィルム18として表面が平滑なフィルムを使用したことから、メラミン化粧板10の外観は良好であったが、耐指紋性が不良であった。また、比較例3では転写操作によってメラミン化粧板10の表面に微細な凹凸を形成しなかったことから、メラミン化粧板10の外観は良好であったが、耐指紋性が悪い結果であった。さらに、比較例4ではメラミン化粧板10の表面にミクロンメートルサイズの凹凸面15が形成されているため外観は仕上がりが白く見えると共に、その表面にナノメートルサイズの微細な凹凸が形成されていないため耐指紋性が悪い結果を示した。   On the other hand, in Comparative Examples 1 and 2, since a film having a smooth surface was used as the transfer film 18, the appearance of the melamine decorative board 10 was good, but the fingerprint resistance was poor. In Comparative Example 3, fine irregularities were not formed on the surface of the melamine decorative board 10 by the transfer operation. Therefore, the appearance of the melamine decorative board 10 was good, but the fingerprint resistance was poor. Furthermore, in Comparative Example 4, since the micrometer-sized uneven surface 15 is formed on the surface of the melamine decorative board 10, the appearance looks white and the nanometer-sized fine unevenness is not formed on the surface. The result showed poor fingerprint resistance.

なお、前記実施形態を次のように変更して実施することも可能である。
・ 凹凸面15を形成する粒子として、平均粒子径が0.1〜2μmのシリカ粒子のほか、アルミナ等の無機粒子を併用することも可能である。
It should be noted that the above embodiment can be modified as follows.
In addition to silica particles having an average particle diameter of 0.1 to 2 μm, inorganic particles such as alumina can be used in combination as the particles forming the uneven surface 15.

・ 転写フィルム18を作製するに際し、粗面フィルム16の表面に離型を容易にする薬剤を塗布した後にコーティング液を塗布し、粗面フィルム16上にコーティング層17を形成することもできる。   In preparing the transfer film 18, the coating layer 17 may be formed on the rough surface film 16 by applying a coating liquid on the surface of the rough surface film 16 and then applying a coating liquid.

・ メラミン化粧板10は、合板、樹脂板等の基材上に前記樹脂含浸紙13を積層して構成することもできる。
・ メラミン化粧板10を構成する樹脂含浸紙13として、5枚のフェノール樹脂含浸紙11上に1枚のメラミン樹脂含浸紙12を積層し、さらにその上に坪量10〜30g/mのオーバーレイ紙にメラミン樹脂を含浸率200〜400%含浸させたものを積層して構成することもできる。この場合、メラミン化粧板10の耐磨耗性を向上させることができる。
-The melamine decorative board 10 can also be comprised by laminating | stacking the said resin impregnated paper 13 on base materials, such as a plywood and a resin board.
-As the resin-impregnated paper 13 constituting the melamine decorative board 10, one sheet of melamine resin-impregnated paper 12 is laminated on five phenol resin-impregnated papers 11, and further an overlay with a basis weight of 10 to 30 g / m 2 It can also be configured by laminating paper impregnated with melamine resin at an impregnation rate of 200 to 400%. In this case, the abrasion resistance of the melamine decorative board 10 can be improved.

10…メラミン化粧板、14…微細粗面層、15…凹凸面、16…粗面フィルム、17…コーティング層、18…転写フィルム。   DESCRIPTION OF SYMBOLS 10 ... Melamine decorative board, 14 ... Fine rough surface layer, 15 ... Irregular surface, 16 ... Rough surface film, 17 ... Coating layer, 18 ... Transfer film.

Claims (5)

メラミン化粧板表面に平均粒子径が0.1〜2μmのシリカ粒子に基づく凹凸面が形成され、該凹凸面上に平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層が形成されていて、メラミン化粧板の表面はミクロンメートルサイズの凹凸面が形成され、その凹凸面上にナノメートルサイズの微細な凹凸が形成された二重構造となっていることを特徴とするメラミン化粧板。 An uneven surface based on silica particles having an average particle diameter of 0.1 to 2 μm is formed on the surface of the melamine decorative board, and a fine rough surface layer containing silica fine particles having an average particle diameter of 1 to 60 nm is formed on the uneven surface. The melamine decorative board is characterized in that the surface of the melamine decorative board is formed with a micrometer-sized uneven surface, and a nanometer-sized fine unevenness is formed on the uneven surface. 前記微細粗面層の厚みが1〜10μmであることを特徴とする請求項1に記載のメラミン化粧板。 The melamine decorative board according to claim 1, wherein the fine rough surface layer has a thickness of 1 to 10 μm. 均粒子径が0.1〜2μmのシリカ粒子に基づく表面に凹凸面を有する粗面フィルム上に、バインダー中に平均粒子径が1〜60nmのシリカ微粒子を含有するコーティング液を塗布してコーティング層を形成した転写フィルムを、メラミン化粧板に対してコーティング層がメラミン化粧板側になるように積層した後、加熱プレス成形を行い、次いで転写フィルムのうち粗面フィルムを剥離してコーティング層をメラミン化粧板表面に転写し、メラミン化粧板表面にコーティング層が乾燥、固化されて平均粒子径が1〜60nmのシリカ微粒子を含む微細粗面層が形成され、メラミン化粧板の表面はミクロンメートルサイズの凹凸面が形成され、その凹凸面上にナノメートルサイズの微細な凹凸が形成された二重構造となっているメラミン化粧板を製造することを特徴とするメラミン化粧板の製造方法。 Rights a rough surface on the film having an irregular surface to the surface average particle size is based on silica particles 0.1-2 .mu.m, the mean particle size in the binder by applying a coating liquid containing the fine silica particles 1~60nm coating After laminating the transfer film on which the layer is formed on the melamine decorative board so that the coating layer is on the melamine decorative board side, heat press molding is performed, and then the rough film is peeled off from the transfer film to form the coating layer. It is transferred to the surface of the melamine decorative board, and the coating layer is dried and solidified on the surface of the melamine decorative board to form a fine rough surface layer containing silica fine particles having an average particle diameter of 1 to 60 nm. melamine of the uneven surface is formed, it has a double structure in which fine irregularities of a nanometer size is formed on the uneven surface Method for producing a melamine decorative board, characterized in that to produce the 粧板. 前記平均粒子径が0.1〜2μmのシリカ粒子は、粗面フィルム中に0.1〜10質量%分散されていることを特徴とする請求項3に記載のメラミン化粧板の製造方法。 4. The method for producing a melamine decorative board according to claim 3, wherein the silica particles having an average particle diameter of 0.1 to 2 [mu] m are dispersed in an amount of 0.1 to 10% by mass in the rough surface film. 前記コーティング液は、平均粒子径が1〜60nmのシリカ微粒子がバインダー樹脂に分散されて形成され、平均粒子径が1〜60nmのシリカ微粒子100質量部に対するバインダー樹脂の割合が10〜150質量部であることを特徴とする請求項3又は請求項4に記載のメラミン化粧板の製造方法。 The coating liquid is formed by dispersing silica fine particles having an average particle diameter of 1 to 60 nm in a binder resin, and the ratio of the binder resin to 10 parts by mass of the silica fine particles having an average particle diameter of 1 to 60 nm is 10 to 150 parts by mass. The method for producing a melamine decorative board according to claim 3, wherein the decorative sheet is a melamine decorative board.
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