JP2010076125A - Decorative plate for flooring material - Google Patents

Decorative plate for flooring material Download PDF

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Publication number
JP2010076125A
JP2010076125A JP2008244007A JP2008244007A JP2010076125A JP 2010076125 A JP2010076125 A JP 2010076125A JP 2008244007 A JP2008244007 A JP 2008244007A JP 2008244007 A JP2008244007 A JP 2008244007A JP 2010076125 A JP2010076125 A JP 2010076125A
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resin layer
acrylic resin
layer
decorative
flooring
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JP2008244007A
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Koichi Takizawa
孝一 滝沢
Shingo Kusano
晋吾 草野
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DIC Corp
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DIC Corp
Dainippon Ink and Chemicals Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative plate for a flooring material having excellent adhesion between a surface protective layer of a wooden base material on which decorative paper with a surface protective layer is pasted and an ultraviolet ray-curable type resin layer. <P>SOLUTION: In the decorative plate for the flooring material having the wooden base material (A), the decorative paper (B) having a printed grain or a printed abstract picture pattern on stencil paper and the surface protective layer composed of an ultraviolet ray-curable resin or a two-liquid type urethane-based resin, an acrylic resin layer (C) and an ultraviolet ray-curable resin layer (D) in this order wherein the acrylic resin layer (C) is a 0.5 to 20 μm thick layer composed of a dried aqueous acrylic resin film having an acid value of not more than 50 mg/KOH and a Tg of not higher than 30°C, and the ultraviolet ray-curable resin layer (D) is 10 to 150 μm thick. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、付着性が良好な床材用化粧シート貼り化粧板に関する。   The present invention relates to a decorative sheet pasted with a decorative sheet for flooring having good adhesion.

近年、意匠性の高い木材を薄くスライスした化粧単板に代わり、合成樹脂製化粧シートや印刷化粧紙を貼り合せた床材が使用され始めている。合成樹脂製化粧シートや印刷化粧紙を貼り合わせた床材は、着色ムラや経時劣化に強い反面、表面保護層が印刷で行われるため表面保護層が薄く、床材としての硬度が不足するだけでなく高級感が得られにくい。   In recent years, instead of a veneer veneer made by thinly slicing highly-designed wood, a flooring material in which a synthetic resin decorative sheet or printed decorative paper is bonded has begun to be used. The flooring with synthetic resin decorative sheets and printed decorative paper is resistant to uneven coloring and deterioration over time, but the surface protective layer is printed so that the surface protective layer is thin and the flooring is only insufficiently hard. It is difficult to get a luxury feeling.

近年、印刷化粧紙の表面保護層の構成を工夫し、表面保護層を有する印刷化粧紙の表面に、更に、電子線硬化型塗料を用いて塗装を施し硬度や耐水性、高級感を付与する方法が提供されている(例えば、特許文献1,2参照)。   In recent years, the structure of the surface protective layer of printed decorative paper has been devised, and the surface of the printed decorative paper having the surface protective layer is further coated with an electron beam curable paint to impart hardness, water resistance, and a high-class feel. A method is provided (see, for example, Patent Documents 1 and 2).

しかしながら、これらの方法においても一般には、後塗装一層目に硬化剤を添加するため、使用時の増粘や、残塗料が使用できない等の問題がある。また、化粧紙の表面保護層の硬化剤や紫外線硬化成分が、経時で完全硬化してしまうと、その後に行う塗膜との付着性が極端に悪化するため、化粧紙の長期の保管ができない。   However, even in these methods, since a curing agent is generally added to the first layer of post-coating, there are problems such as thickening at the time of use and residual paint cannot be used. In addition, if the curing agent and UV-curing component of the surface protective layer of the decorative paper are completely cured over time, the adhesion with the coating film to be performed thereafter is extremely deteriorated, so that the decorative paper cannot be stored for a long time. .

しかしながら、これらの方法においても、一般には、印刷化粧紙の表面保護層には硬化剤が含有されるため、印刷化粧紙の表面保護層の硬化剤や紫外線硬化成分が、経時で完全硬化した場合、その後に、塗工する、電子線硬化型塗料又は紫外線硬化型塗料の塗膜との付着性が極端に悪化する。そのため、表面保護層を有する印刷化粧紙としての長期の保管が困難になり、床材製造工程の自由度が少なくなっている。   However, even in these methods, generally, since the surface protective layer of the printed decorative paper contains a curing agent, the curing agent and the ultraviolet curing component of the surface protective layer of the printed decorative paper are completely cured over time. Thereafter, the adhesion of the applied electron beam curable paint or ultraviolet curable paint to the coating film is extremely deteriorated. Therefore, long-term storage as printed decorative paper having a surface protective layer becomes difficult, and the degree of freedom in the flooring manufacturing process is reduced.

特開平11−138734号公報JP 11-138734 A 特開2002−147004号公報JP 2002-147004 A

本発明の課題は、このような従来技術の抱える課題を解決するものであり、表面保護層を有する化粧紙を貼り合わせた木質基材の該表面保護層と紫外線硬化型樹脂層とが優れた付着性を有する床材用化粧板を提供することにある。   The problem of the present invention is to solve such problems of the prior art, and the surface protective layer and the ultraviolet curable resin layer of the wooden substrate on which the decorative paper having the surface protective layer is bonded are excellent. It is providing the decorative board for flooring which has adhesiveness.

本発明者らは、鋭意検討の結果、印刷化粧紙の表面保護層と、後塗装の紫外線硬化型樹脂層(D)の間にアクリル樹脂層(C)を挟むことにより優れた付着性を有する床材用化粧板を得ることを見出した。   As a result of intensive studies, the present inventors have excellent adhesion by sandwiching the acrylic resin layer (C) between the surface protective layer of the printed decorative paper and the UV-curable resin layer (D) of the post-coating. It has been found that a decorative board for flooring is obtained.

すなわち、本発明は、木質基材(A)、紙基材上に、木目又は抽象柄の絵模様が印刷され、紫外線硬化型樹脂又は二液ウレタン系樹脂からなる表面保護層が形成された化粧紙(B)、アクリル樹脂層(C)、及び、紫外線硬化型樹脂層(D)をこの順に有する床材用化粧板であって、該アクリル樹脂層(C)が、酸価が50mg/KOH以下、Tgが30℃以下の水性アクリル樹脂の乾燥皮膜からなる、厚さ0.5〜20μmの層であり、紫外線硬化型樹脂層(D)が厚さ10〜150μmである床材用化粧板を提供する。   That is, the present invention is a makeup in which a wood grain or abstract pattern is printed on a wood substrate (A) or a paper substrate, and a surface protective layer made of an ultraviolet curable resin or a two-component urethane resin is formed. A decorative sheet for flooring having a paper (B), an acrylic resin layer (C), and an ultraviolet curable resin layer (D) in this order, the acrylic resin layer (C) having an acid value of 50 mg / KOH Hereinafter, a decorative board for flooring comprising a dry film of an aqueous acrylic resin having a Tg of 30 ° C. or less and a thickness of 0.5 to 20 μm, and an ultraviolet curable resin layer (D) having a thickness of 10 to 150 μm. I will provide a.

本発明により、木質基材に、表面保護層を有する印刷化粧紙を貼り合わせた床材用化粧板に於いて、該表面保護層と、更に、床材としての機能を向上するために塗工する紫外線硬化型樹脂層とが優れた付着性を有する床材用化粧板を提供することができる。その結果、印刷の意匠性を活かし、且つ、表面硬度にも優れる床材用化粧板を提供することができる。   According to the present invention, in a decorative sheet for flooring in which a printed decorative paper having a surface protective layer is bonded to a wooden substrate, the surface protective layer and a coating for improving the function as a flooring material are applied. It is possible to provide a decorative sheet for flooring having excellent adhesion to the ultraviolet curable resin layer. As a result, it is possible to provide a decorative sheet for flooring that makes use of the design of printing and is excellent in surface hardness.

本発明は、木質基材(A)、原紙上に、木目又は抽象柄の絵模様が印刷され、紫外線硬化型樹脂又は二液ウレタン系樹脂からなる表面保護層が形成された化粧紙(B)、アクリル樹脂層(C)、及び、紫外線硬化型樹脂層(D)をこの順に有する床材用化粧板であって、該アクリル樹脂層(C)が、酸価が50mg/KOH以下、Tgが30℃以下の水性アクリル樹脂の乾燥皮膜からなる、厚さ0.5〜20μmの層であり、紫外線硬化型樹脂層(D)が厚さ10〜150μmである床材用化粧板を提供する。   The present invention is a decorative paper (B) in which a wood substrate or an abstract pattern is printed on a wood substrate (A) and base paper, and a surface protective layer made of an ultraviolet curable resin or a two-component urethane resin is formed. , An acrylic resin layer (C), and an ultraviolet curable resin layer (D) in this order, and the acrylic resin layer (C) has an acid value of 50 mg / KOH or less and Tg of Provided is a decorative sheet for flooring, which is a layer having a thickness of 0.5 to 20 μm, and a UV curable resin layer (D) having a thickness of 10 to 150 μm, and comprising a dry film of an aqueous acrylic resin at 30 ° C. or less.

本発明に用いる木質基材(A)は特に限定されないが、ラワン等の南洋材を貼り合わせただけの普通合板や針葉樹を貼り合わせた針葉樹合板が用いられる。また、印刷化粧紙直下にはMDFなどの平滑な基材を用いることが好ましい。基材を平滑にすることにより化粧紙と基材が平滑に貼り付けられ、良好な外観の化粧板が得られる。   Although the woody base material (A) used for this invention is not specifically limited, The softwood plywood which bonded the common plywood and softwood which only stuck south seawoods, such as a lauan, is used. Further, it is preferable to use a smooth base material such as MDF directly under the decorative printing paper. By making the base material smooth, the decorative paper and the base material are attached smoothly, and a decorative board having a good appearance can be obtained.

化粧紙(B)は、原紙上に、木目又は抽象柄の絵模様が印刷され、紫外線硬化型樹脂又は二液ウレタン系樹脂からなる表面保護層が形成されている。本発明の化粧紙(B)に用いる原紙は特に限定されないが、紙間強度を強化する目的で強化剤を添加した強化薄葉紙などが好ましい。また、木質基材の色を透過させないために坪量30g/m以上の強化薄葉紙が好ましい。これらの原紙上に、床材に求められるような意匠性を有する、木目又は抽象柄の絵模様が印刷される。印刷法式としては、例えば、グラビア印刷、オフセット印刷、シルクスクリーン印刷等の印刷法式が適用できる。尚、これらの模様の印刷に際しては、各種の加工がされていても良い。例えば、木質基材の色を透過させないために、着色隠蔽層を設けたり、原紙との付着を目的にプライマー層を設けたりしても良い。また、絵柄印刷は一層印刷でも複層で印刷されていても良い。 The decorative paper (B) has a wood grain or abstract pattern printed on the base paper, and a surface protective layer made of an ultraviolet curable resin or a two-component urethane resin is formed. The base paper used for the decorative paper (B) of the present invention is not particularly limited, but reinforced thin paper to which a reinforcing agent is added for the purpose of enhancing the strength between the papers is preferable. In addition, a reinforced thin paper having a basis weight of 30 g / m 2 or more is preferable in order not to allow the color of the wooden base material to pass through. On these base papers, a pattern of wood grain or abstract pattern having the design required for flooring is printed. As the printing method, for example, a printing method such as gravure printing, offset printing, silk screen printing or the like can be applied. Various types of processing may be performed when printing these patterns. For example, a colored concealment layer may be provided or a primer layer may be provided for the purpose of adhering to the base paper so as not to allow the color of the woody substrate to pass through. Further, the pattern printing may be a single-layer printing or a multi-layer printing.

表面保護層は、紫外線硬化型樹脂であれば、例えば、ウレタンアクリレートやエポキシアクリレート、ポリエステルアクリレートのオリゴマー成分や、2−ヒドロキシエチルアクリレートやジプロピレングリコールジアクリレート、トリメチロールプロパントリアクリレート等に代表されるアクリレートモノマー等とラジカル重合光開始剤(例えばベンゾインエチルエーテル、ベンジルジメチルケタール、ヒドロキシシクロヘキシルフェニルケトン、2−ヒドロキシ−2−メチルフェニルケトン等)を混合したものが挙げられる。二液ウレタン系樹脂であれば、例えば、ポリエステル、アクリル等のポリオールとイソシアネートの二液混合したもの等が例示できる。また、表面保護層には必要に応じて、各種の機能を付与するため着色剤、体質顔料、滑剤、可塑剤、消泡剤、酸化防止剤、カップリング剤、有機溶剤及びキレート剤などの添加剤を添加されていてもよい。   If the surface protective layer is an ultraviolet curable resin, it is represented by, for example, an oligomer component of urethane acrylate, epoxy acrylate, or polyester acrylate, 2-hydroxyethyl acrylate, dipropylene glycol diacrylate, trimethylolpropane triacrylate, or the like. Examples thereof include a mixture of an acrylate monomer or the like and a radical polymerization photoinitiator (for example, benzoin ethyl ether, benzyl dimethyl ketal, hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methylphenyl ketone, or the like). As long as it is a two-component urethane-based resin, for example, a mixture of a polyol and an isocyanate such as polyester and acrylic and the like may be exemplified. The surface protective layer may be added with colorants, extender pigments, lubricants, plasticizers, antifoaming agents, antioxidants, coupling agents, organic solvents, chelating agents, etc. as necessary to give various functions. An agent may be added.

印刷化粧紙(B)と木質基材(A)は、任意の方法で貼りあわせることが可能である。例えば酢酸ビニルエマルション系、フェノール系、尿素系等の接着剤を用い、加圧プレス法、又はラミネート法等で張り合わせることが可能である。張り合わせた後は接着性の向上と基材の冷却のために数時間の養生時間を置くことが好ましい。   The printed decorative paper (B) and the wooden substrate (A) can be bonded together by an arbitrary method. For example, an adhesive such as a vinyl acetate emulsion type, a phenol type, or a urea type can be used, and pasting can be performed by a pressure press method or a laminate method. After pasting, it is preferable to set a curing time of several hours in order to improve adhesion and cool the substrate.

貼り合わせた印刷化粧紙と木質基材は、塗装を行う前に実加工や溝加工、小口加工を行うことができる。加工する際は、印刷化粧紙に傷が付かないことが条件であることから、表面保護層は紫外線硬化や二液硬化などの反応系であることが好ましい。   The laminated printed decorative paper and the wood base material can be subjected to actual processing, groove processing, and edge processing before coating. In processing, since it is a condition that the printed decorative paper is not damaged, the surface protective layer is preferably a reaction system such as ultraviolet curing or two-component curing.

化粧紙(B)の表面保護層と紫外線硬化型樹脂層(D)の間に、アクリル樹脂層(C)を介在させることにより、両者の密着性を向上させることが、本発明の趣旨となる。   It is the gist of the present invention to improve the adhesion between the decorative paper (B) and the ultraviolet curable resin layer (D) by interposing the acrylic resin layer (C). .

アクリル樹脂層(C)を形成するための塗料組成物は、酸価が50mg/KOH以下、Tgが30℃以下の水性アクリル樹脂を水に分散させた水性アクリル樹脂水分散液、又は、水に溶解させた水性アクリル樹脂水溶液として調製される。   The coating composition for forming the acrylic resin layer (C) is an aqueous acrylic resin aqueous dispersion in which an aqueous acrylic resin having an acid value of 50 mg / KOH or less and a Tg of 30 ° C. or less is dispersed in water, or in water. It is prepared as a dissolved aqueous acrylic resin aqueous solution.

これらの内、特に水性アクリル樹脂水分散液が好ましく、酸価が50mg/KOH以下、Tgが30℃以下の水性アクリル樹脂を水に分散させた水性アクリル樹脂水分散液の市販品としては、ハイロスJE−1113(星光PMC社製)が挙げられる。   Of these, aqueous acrylic resin aqueous dispersions are particularly preferred. Commercially available aqueous acrylic resin aqueous dispersions in which aqueous acrylic resins having an acid value of 50 mg / KOH or less and Tg of 30 ° C. or less are dispersed in water include high loss. Examples thereof include JE-1113 (manufactured by Seiko PMC).

分散助剤としてアルコールやアクリルモノマー、分散剤などが添加されていても構わないが、VOCの観点から完全水性の樹脂分散体であることが好ましい。   Alcohol, an acrylic monomer, a dispersing agent or the like may be added as a dispersing aid, but a completely aqueous resin dispersion is preferable from the viewpoint of VOC.

アクリル樹脂層(C)の塗工方法は、アクリル樹脂層が印刷化粧紙の表面保護層に直接接していれば特に限定されるものではなく、従来公知の方法でかまわない。例えばロールコート法、グラビアコート法、フローコート法、コンマコート法、スプレーコート法等で塗工することにより塗工される。また塗工後はアクリル樹脂の分散乃至は溶解に使用されている溶剤や水が十分乾燥し得るだけの乾燥工程があることが特に好ましい。   The method for applying the acrylic resin layer (C) is not particularly limited as long as the acrylic resin layer is in direct contact with the surface protective layer of the printed decorative paper, and may be a conventionally known method. For example, the coating is performed by coating by a roll coating method, a gravure coating method, a flow coating method, a comma coating method, a spray coating method or the like. In addition, it is particularly preferable that there is a drying step after coating so that the solvent and water used for dispersing or dissolving the acrylic resin can be sufficiently dried.

アクリル樹脂含有の塗料組成物には、さらに必要に応じて本発明の目的を逸脱しない範囲内で、各種の機能を付与するためアクリレートモノマー、光開始剤、体質顔料、滑剤、可塑剤、消泡剤、酸化防止剤、カップリング剤、有機溶剤及びキレート剤などの添加剤を添加することができる。   The acrylic resin-containing coating composition further has various functions within a range not departing from the object of the present invention, if necessary, in order to provide various functions, acrylate monomer, photoinitiator, extender pigment, lubricant, plasticizer, antifoaming Additives such as agents, antioxidants, coupling agents, organic solvents and chelating agents can be added.

溝加工や、小口加工された基材に塗工する場合は、意匠性向上のために溝部分や小口部分に、印刷化粧紙の絵柄に用いた色のうち、少なくとも1色の着色剤を用いて同等色に着色することができる。着色は従来公知の方法で着色することができ、アクリル樹脂層に着色しても、アクリル樹脂層を塗工した後に着色しても良い。着色に用いられる塗料としては、従来公知の油性、水性いずれのものを用いても構わないが、VOCの観点から、水性の顔料分散体を用いることが好ましい。しかしながら、現状の床材の塗工設備に対応するためには、アクリル樹脂に着色剤を分散し、スポンジリバースコーター、ナチュラルコーターのウェット・オン・ウェット方式で塗工を行うことがより好ましい。着色後は着色剤に使用されている溶剤や水が十分乾燥し得るだけの乾燥工程があることが特に好ましい。   In the case of applying to a grooved or edge-processed substrate, at least one colorant among the colors used for the printed decorative paper pattern is used for the groove or edge for improving the design. To the same color. The coloring can be performed by a conventionally known method, and the acrylic resin layer may be colored or may be colored after the acrylic resin layer is applied. As the paint used for coloring, any of conventionally known oily and aqueous paints may be used, but from the viewpoint of VOC, it is preferable to use an aqueous pigment dispersion. However, in order to cope with the current flooring coating equipment, it is more preferable to disperse the colorant in the acrylic resin and perform the coating by a sponge reverse coater or a natural coater wet-on-wet system. It is particularly preferable that after the coloring, there is a drying step that can sufficiently dry the solvent and water used in the colorant.

アクリル樹脂(C)の上層に形成される紫外線硬化型樹脂層(D)は、1層でも複層でも構わないが、アクリル樹脂層との付着を目的としたシーラー層、耐磨耗剤を含有する中塗り層、トップコート層の少なくとも3層を有することが好ましい。   The ultraviolet curable resin layer (D) formed on the upper layer of the acrylic resin (C) may be one layer or multiple layers, but contains a sealer layer for the purpose of adhesion to the acrylic resin layer and an antiwear agent. It is preferable to have at least three layers of an intermediate coating layer and a top coat layer.

紫外線硬化型樹脂、モノマーの例示として、ウレタンアクリレートやエポキシアクリレート、ポリエステルアクリレートのオリゴマー成分や、2−ヒドロキシエチルアクリレートやジプロピレングリコールジアクリレート、トリメチロールプロパントリアクリレートなどに代表されるアクリレートモノマー等が挙げられる。   Examples of UV curable resins and monomers include urethane acrylate, epoxy acrylate, polyester acrylate oligomer components, acrylate monomers such as 2-hydroxyethyl acrylate, dipropylene glycol diacrylate, and trimethylolpropane triacrylate. It is done.

紫外線硬化型樹脂層(D)を形成する紫外線硬化型塗料の塗装も従来公知の方法で構わず、ナチュラルコーターや、フローコーター、スプレー等を用いることができる。これらの工程で用いられる塗料は従来公知のものを用いることができるが、VOCの観点から溶剤分が5%以下の低溶剤型の紫外線硬化型塗料を用いることが好ましい。   The application of the ultraviolet curable paint for forming the ultraviolet curable resin layer (D) may be performed by a conventionally known method, and a natural coater, a flow coater, a spray, or the like can be used. Conventionally known paints can be used in these steps, but from the viewpoint of VOC, it is preferable to use a low solvent type UV curable paint having a solvent content of 5% or less.

前記した、紫外線硬化型樹脂層の各層は、要求される外観や塗装方式に応じて任意に設定することができるが、シーラー層については、5〜20μmの塗膜厚をナチュラルロールコーターにより塗工することが好ましく、より安定的な付着性を目的としてイソシアネート系の硬化剤を5〜15部添加することがさらに好ましい。   Each layer of the ultraviolet curable resin layer described above can be arbitrarily set according to the required appearance and coating method. For the sealer layer, a coating thickness of 5 to 20 μm is applied by a natural roll coater. It is preferable to add 5 to 15 parts of an isocyanate curing agent for the purpose of more stable adhesion.

中塗り層の耐磨耗剤として用いるホワイトアランダムは、どのような形状のものを用いても構わないが、透明性(意匠性)や耐摩耗性、価格の要求から、#280〜#600のものを用いることが好ましい。耐磨耗剤の配合量は、使用する塗料や塗布量、要求性能により任意に設定することができる。例えば前記した低溶剤型の紫外線硬化塗料を用いて、JAS合板の耐摩耗性を維持する目的では、#500のホワイトアランダムを30%配合し、10〜20μmの硬化樹脂層を形成することが好ましい。   White alundum used as an anti-wear agent for the intermediate coating layer may be of any shape, but from the requirements of transparency (designability), wear resistance and price, # 280 to # 600 It is preferable to use those. The blending amount of the antiwear agent can be arbitrarily set depending on the paint used, the coating amount, and the required performance. For example, for the purpose of maintaining the wear resistance of the JAS plywood using the above-mentioned low solvent type UV curable paint, 30% of # 500 white alundum is blended to form a cured resin layer of 10 to 20 μm. preferable.

耐磨耗剤を配合する紫外線硬化型塗料には、ホワイトアランダムの沈降を抑止するように、沈降防止剤やシリカを配合することが好ましい。   It is preferable to add an anti-settling agent or silica to the ultraviolet curable paint containing an antiwear agent so as to suppress the precipitation of white alundum.

低溶剤の紫外線硬化塗料を使用する場合、塗料温度は、20〜50℃程度、基材温度は10〜70℃程度であることが好ましい。40℃以下では塗装した光ラジカル反応性塗料組成物の塗装後の表面のレベリング性が得られにくく、木質基材に90℃を超える温度がかかると木質基材そのものが劣化する恐れがある。   When using a low-solvent ultraviolet curable coating, the coating temperature is preferably about 20 to 50 ° C. and the substrate temperature is preferably about 10 to 70 ° C. Below 40 ° C., the leveling property of the coated photoradical reactive coating composition after coating is difficult to obtain, and when the temperature exceeding 90 ° C. is applied to the wood substrate, the wood substrate itself may be deteriorated.

紫外線を照射する場合、高圧水銀灯、エキシマランプ、メタルハライドランプ等を備えた公知の紫外線照射装置を使用することができる。   When irradiating with ultraviolet rays, a known ultraviolet irradiating device including a high pressure mercury lamp, an excimer lamp, a metal halide lamp, or the like can be used.

以下、実施例によって、本発明を具体的に説明する。   Hereinafter, the present invention will be described specifically by way of examples.

(化粧紙の作成)
坪量30g/mの紙間強化紙の表面に、プライマー層、着色隠蔽層、木目柄層をグラビア塗工した印刷化粧紙に、アクリルポリオール樹脂100重量部、イソシアネート硬化剤(HMDI)5重量部の組成から成る二液硬化型ウレタン塗料をグラビア塗工方式にて乾燥後塗膜厚15g/mになるよう塗工した。
(Making of decorative paper)
Printed decorative paper with a gravure-coated primer layer, colored concealment layer, and wood grain pattern layer on the surface of inter-paper reinforced paper with a basis weight of 30 g / m 2 , 100 parts by weight of acrylic polyol resin, 5 weight of isocyanate curing agent (HMDI) A two-component curable urethane paint having a composition of parts was dried by a gravure coating method so as to have a coating film thickness of 15 g / m 2 .

(塗工前化粧板の作成)
乾燥後60℃で3日間養生した化粧紙を、7mm厚のMDF基材に酢酸ビニル系エマルジョン接着剤を用い、プレス法にて接着し基材となる化粧板を得た。接着した後、60℃にて3日間養生を行い、化粧板を作成した。
(Preparation of decorative plate before coating)
After drying, the decorative paper cured at 60 ° C. for 3 days was bonded to a 7 mm thick MDF base material using a vinyl acetate emulsion adhesive by a pressing method to obtain a decorative board as a base material. After bonding, curing was performed at 60 ° C. for 3 days to prepare a decorative board.

(塗工板の作成)
塗工前化粧板の作成及び後述の紫外線硬化型樹脂層(D)の形成は、実施例、比較例とも共通にして、アクリル樹脂層(C)を検討する。アクリル樹脂は、表に示す各種アクリル樹脂を用い、水性アクリル樹脂水分散体を調製し、ナチュラルロールコーターにて、ウェット塗布量がそれぞれ20g/mになるように塗工を行い、100℃1分間で乾燥を行った。
(Creation of coated plate)
The acrylic resin layer (C) is studied in common with the examples and comparative examples for the preparation of the decorative plate before coating and the formation of the ultraviolet curable resin layer (D) described later. As the acrylic resin, various acrylic resins shown in the table were used to prepare a water-based acrylic resin aqueous dispersion, and coating was performed with a natural roll coater so that the wet coating amount was 20 g / m 2. Drying was performed in minutes.

(実施例1)
前記した水性アクリル樹脂分散体として、酸価42、Tgが−24℃のアクリル樹脂N.V.40%の水性樹脂分散体であるハイロスJE−1113(星光PMC社製)を用いて、ナチュラルロールコーターにて、前述の塗工前化粧板上に、ウェット塗布量がそれぞれ20g/mになるように塗工を行い、100℃1分間で乾燥を行った。
Example 1
As the above-mentioned aqueous acrylic resin dispersion, an acrylic resin N.D. having an acid value of 42 and a Tg of −24 ° C. V. Using a high-loss JE-1113 (manufactured by Seiko PMC Co., Ltd.) that is a 40% aqueous resin dispersion, the wet coating amount is 20 g / m 2 on the above-mentioned decorative plate before coating with a natural roll coater. Coating was performed as described above, and drying was performed at 100 ° C. for 1 minute.

(紫外線硬化型樹脂層(D)の形成)
シーラーとしては、2〜3官能のウレタンアクリレート樹脂とACMOを主体とし、体質顔料を8重量部配合した無溶剤型の紫外線硬化塗料をナチュラルロールコーターにて、塗料温度45℃、ウェット塗布量18g/mで塗工を行った。
(Formation of UV curable resin layer (D))
As the sealer, a solvent-free UV-curing paint mainly composed of 2-3 functional urethane acrylate resin and ACMO and containing 8 parts by weight of extender pigment is applied with a natural roll coater at a paint temperature of 45 ° C. and a wet coating amount of 18 g / Coating was performed at m 2 .

中塗りとしては、エポキシアクリレート樹脂とTPGDA(トリプロピレングリコールジアクリレート)を主体とし、体質顔料を5重量部配合した無溶剤型の紫外線硬化塗料に、耐磨剤として、酸化アルミニウムを主成分とするホワイトアランダム#320を外割で20重量部配合した塗料をナチュラルロールコーターにて、塗料温度45℃、ウェット塗布量25g/mで塗工を行った。 As an intermediate coating, it is a solvent-free UV-curing paint mainly composed of epoxy acrylate resin and TPGDA (tripropylene glycol diacrylate), and 5 parts by weight of extender pigment, and mainly composed of aluminum oxide as an anti-wear agent. A coating containing 20 parts by weight of white alundum # 320 was applied by a natural roll coater at a coating temperature of 45 ° C. and a wet coating amount of 25 g / m 2 .

上塗りとしては、エポキシアクリレート樹脂とEoTMPTA(エチレンオキサイド付加トリメチロールプロパントリアクリレート)、ACMO(モルフォリンのアクリレート)を主体とし、艶消し剤としてシリカを5重量部、体質顔料を10重量部配合し、光沢を40グロス程度に調整した無溶剤型の紫外線硬化塗料をナチュラルロールコーターにて、塗料温度45℃、ウェット塗布量10g/mで塗工を行った。以上の工程で、床材用化粧板(実施例化粧板1)を得た。 As the top coat, epoxy acrylate resin, EoTMPTA (ethylene oxide-added trimethylolpropane triacrylate), ACMO (morpholine acrylate) are the main ingredients, 5 parts by weight of silica as matting agent, 10 parts by weight of extender pigment, The solvent-free UV curable paint with gloss adjusted to about 40 gloss was applied with a natural roll coater at a paint temperature of 45 ° C. and a wet coating amount of 10 g / m 2 . Through the above steps, a decorative board for flooring (Example decorative board 1) was obtained.

(実施例2)
中塗りとして、エポキシアクリレート樹脂とTPGDA(トリプロピレングリコールジアクリレート)を主体とし、体質顔料を5重量部配合した無溶剤型の紫外線硬化塗料をナチュラルロールコーターにて、塗料温度45℃、ウェット塗布量25g/mで塗工を行った以外は、実施例1と同条件で、床材用化粧板(実施例化粧板2)を得た。
(Example 2)
As an intermediate coating, a solvent-free UV curable paint consisting mainly of epoxy acrylate resin and TPGDA (tripropylene glycol diacrylate) and 5 parts by weight of extender pigment is applied on a natural roll coater at a paint temperature of 45 ° C and a wet coating amount. A decorative sheet for flooring (Example decorative board 2) was obtained under the same conditions as in Example 1 except that coating was performed at 25 g / m 2 .

(比較例1)
前述の塗工前化粧板に、アクリル樹脂層を介在させず、直接に、実施例1と同様の紫外線硬化型樹脂層(D)を形成し、床材用化粧板(比較例1化粧板)を得た。
(Comparative Example 1)
An ultraviolet curable resin layer (D) similar to that in Example 1 was directly formed on the above-mentioned decorative board before coating without an acrylic resin layer interposed therebetween, and a decorative board for flooring (Comparative Example 1 decorative board) Got.

(比較例2)
前記した水性アクリル樹脂分散体として、酸価65、Tgが19℃のアクリル樹脂N.V.24.5%の水性樹脂分散体であるPDX−6102B(ジョンソンポリマー社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例2化粧板)を得た。
(Comparative Example 2)
As the above-mentioned aqueous acrylic resin dispersion, an acrylic resin N.D. having an acid value of 65 and a Tg of 19 ° C. V. A decorative board for flooring (Comparative Example 2 decorative board) was obtained in the same manner as in Example 1 except that PDX-6102B (manufactured by Johnson Polymer Co., Ltd.), which is a 24.5% aqueous resin dispersion, was used.

(比較例3)
前記した水性アクリル樹脂分散体として、酸価27、Tgが41℃のアクリル樹脂N.V.45%の水性樹脂分散体であるNeocrylXK−220(DSM社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例3化粧板)を得た。
(Comparative Example 3)
As the water-based acrylic resin dispersion described above, an acrylic resin having an acid value of 27 and a Tg of 41 ° C. V. A decorative sheet for flooring (Comparative Example 3 decorative board) was obtained in the same manner as in Example 1 except that NeocryXK-220 (manufactured by DSM) which is a 45% aqueous resin dispersion was used.

(比較例4)
前記した水性アクリル樹脂分散体として、Tgが40℃のアクリル樹脂N.V.30%の水性樹脂分散体であるスーパーフレックス150(第一工業製薬社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例4化粧板)を得た。
(Comparative Example 4)
As the above-mentioned aqueous acrylic resin dispersion, acrylic resin N.T. V. A decorative board for flooring (Comparative Example 4 decorative board) was obtained in the same manner as in Example 1, except that Superflex 150 (Daiichi Kogyo Seiyaku Co., Ltd.), which is a 30% aqueous resin dispersion, was used.

(比較例5)
前記した水性アクリル樹脂分散体として、アクリル樹脂N.V.40%の水性樹脂分散体であるラロマーLR9005(BASF社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例5化粧板)を得た。
(Comparative Example 5)
As the above-mentioned aqueous acrylic resin dispersion, acrylic resin N.I. V. A decorative board for flooring (Comparative Example 5 decorative board) was obtained in the same manner as in Example 1 except that Laromar LR9005 (BASF), which is a 40% aqueous resin dispersion, was used.

(比較例6)
前記した水性アクリル樹脂分散体として、アクリル樹脂N.V.50%の水性樹脂分散体であるラロマーPE−22WN(BASF社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例6化粧板)を得た。
(Comparative Example 6)
As the above-mentioned aqueous acrylic resin dispersion, acrylic resin N.I. V. A decorative board for flooring (Comparative Example 6 decorative board) was obtained in the same manner as in Example 1, except that Laromar PE-22WN (BASF), which is a 50% aqueous resin dispersion, was used.

(比較例7)
前記した水性アクリル樹脂分散体として、酸価9.4のアクリル樹脂N.V.35.5%の水性樹脂分散体であるNeopacE125(DSM社製)を用いた他は、実施例1と同様に、床材用化粧板(比較例7化粧板)を得た。
(Comparative Example 7)
As the above-mentioned aqueous acrylic resin dispersion, acrylic resin N. V. A decorative sheet for flooring (Comparative Example 7 decorative board) was obtained in the same manner as in Example 1 except that Neopac E125 (manufactured by DSM) which is a 35.5% aqueous resin dispersion was used.

(付着性の評価)
碁盤目密着法にて行った。2mm間で、カッターで碁盤目状に切れ目を入れ、セロハン粘着テープを貼り付け強く引き剥がし付着した数を数えた(100/100(付着性良好)、0/100(付着しない))。
(Evaluation of adhesion)
The cross-cut adhesion method was used. Between 2 mm, cuts were made in a grid pattern with a cutter, and cellophane adhesive tape was applied and peeled off strongly to count the number (100/100 (adhesiveness good), 0/100 (no adhesion)).

(磨耗性の評価)
テーバー磨耗試験機にて行った。試験方法はJAS合板の磨耗A試験に準じ、塗膜残存率50%に至るまでの回転数を示した。500回での塗膜残存率が50%以上の場合500回以上と記載した。
(Evaluation of abrasion)
The test was conducted with a Taber abrasion tester. The test method showed the number of rotations up to a coating film remaining rate of 50% according to the wear A test of JAS plywood. When the coating film remaining rate at 500 times was 50% or more, it was described as 500 times or more.

Figure 2010076125
Figure 2010076125

本発明により、良好な付着性を有する化粧紙貼り木質床材が提供される。この結果、さまざまな柄の木質フロアが可能となるような新設計の商品の開発、基材色が大きく振れた木質基材の有効活用、木質化粧単板の調色不良によるクレームの減少、調色時間削減による作業効率の向上等様々な利点が示唆される。   According to the present invention, a decorative paper-pasted wood flooring having good adhesion is provided. As a result, the development of newly designed products that enable wood floors with various patterns, the effective use of wood base materials with large substrate color swings, the reduction of complaints due to poor toning of wood decorative veneer, Various advantages such as improvement of work efficiency by reducing color time are suggested.

Claims (3)

木質基材(A)、原紙上に、木目又は抽象柄の絵模様が印刷され、紫外線硬化型樹脂又は二液ウレタン系樹脂からなる表面保護層が形成された化粧紙(B)、アクリル樹脂層(C)、及び、紫外線硬化型樹脂層(D)をこの順に有する床材用化粧板であって、該アクリル樹脂層(C)が、酸価が50mg/KOH以下、Tgが30℃以下の水性アクリル樹脂の乾燥皮膜からなる、厚さ0.5〜20μmの層であり、紫外線硬化型樹脂層(D)が厚さ10〜150μmであることを特徴とする床材用化粧板。 Decorative paper (B), acrylic resin layer on which a wood substrate (A) and base paper are printed with a grain or abstract pattern and a surface protective layer made of an ultraviolet curable resin or a two-component urethane resin is formed (C) and a decorative board for flooring having an ultraviolet curable resin layer (D) in this order, wherein the acrylic resin layer (C) has an acid value of 50 mg / KOH or less and Tg of 30 ° C. or less. A decorative board for flooring comprising a dry film of an aqueous acrylic resin and having a thickness of 0.5 to 20 µm, and an ultraviolet curable resin layer (D) having a thickness of 10 to 150 µm. 前記した紫外線硬化型樹脂層(D)が、複数の層で形成されている請求項1に記載の床材用化粧板。 The decorative board for flooring according to claim 1, wherein the ultraviolet curable resin layer (D) is formed of a plurality of layers. 前記した紫外線硬化型樹脂層(D)の内、少なくとも一層がホワイトアランダムを含有する紫外線硬化型樹脂層である請求項1又は2に記載の床材用化粧板。 The decorative board for flooring according to claim 1 or 2, wherein at least one of the ultraviolet curable resin layers (D) is an ultraviolet curable resin layer containing white alundum.
JP2008244007A 2008-09-24 2008-09-24 Decorative plate for flooring material Pending JP2010076125A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014524368A (en) * 2011-08-02 2014-09-22 サーフェス テクノロジーズ ゲーエムベーハー アンド カンパニー,カーゲー Method for producing decorated wall, ceiling or floorboard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014524368A (en) * 2011-08-02 2014-09-22 サーフェス テクノロジーズ ゲーエムベーハー アンド カンパニー,カーゲー Method for producing decorated wall, ceiling or floorboard
US9434206B2 (en) 2011-08-02 2016-09-06 Surface Technologies Gmbh & Co. Kg Method for producing a decorated wall, ceiling or floor panel

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