JP6156714B2 - Wood board - Google Patents
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- JP6156714B2 JP6156714B2 JP2012132520A JP2012132520A JP6156714B2 JP 6156714 B2 JP6156714 B2 JP 6156714B2 JP 2012132520 A JP2012132520 A JP 2012132520A JP 2012132520 A JP2012132520 A JP 2012132520A JP 6156714 B2 JP6156714 B2 JP 6156714B2
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Description
本発明は、床材等に用いる木質板に関する。 The present invention relates to a wooden board used for flooring or the like.
床材等に用いる木質板には、通常、木質板表面の保護を目的として表面に塗装が施されている。木質板表面の塗装には、導管孔の処理の仕方によって、オープンポア仕上げ、セミクローズポア仕上げ、クローズポア仕上げがあり、木質板の用途に応じて適宜施される。 A wooden board used for flooring or the like is usually coated on the surface for the purpose of protecting the surface of the wooden board. There are open pore finish, semi-closed pore finish, and close pore finish depending on the method of treating the conduit hole, and the wood board surface is appropriately applied according to the use of the wood board.
木質板の表面に木の温かみを与える場合には、塗料の塗布量を少なくして、導管孔を塗料で埋めないオープンポア仕上げが好ましく用いられる。 When giving the warmth of the wood to the surface of the wood board, an open pore finish in which the coating amount is reduced and the conduit hole is not filled with the paint is preferably used.
また、木質板表面の樹種の質感を生かした仕上げとする場合には、導管孔以外は平滑に仕上げ、導管孔の一部を塗料で埋めるセミクローズポア仕上げが用いられる。 In addition, when finishing using the texture of the wood species on the surface of the wood board, semi-closed pore finishing is used in which the parts other than the conduit holes are finished smoothly and part of the conduit holes are filled with paint.
さらに、傷がつきにくく、防汚性を確保した木質板とする場合には、導管孔をはじめ、木質板表面の孔を塗料で埋めるクローズポア仕上げが用いられる。 Furthermore, in the case of a wooden board that is hard to be scratched and has an antifouling property, a closed pore finish that fills holes on the surface of the wooden board with paint is used, including conduit holes.
特に密度の高い広葉樹を木質基材として用いた木質板では、クローズポア仕上げにより木質基材表面に塗料を厚塗りして平滑にすることでさらに高級感が得られるため、数百μmオーダーの塗膜厚とすることにより、木質板の表面を平滑にすることが提案されている(例えば、特許文献1を参照)。 In particular, with wood boards that use high-density hardwood as the wood substrate, a high-grade feeling can be obtained by applying a smooth paint to the surface of the wood substrate by close pore finishing. It has been proposed to smooth the surface of the wooden board by setting the film thickness (see, for example, Patent Document 1).
一方、木質板表面の質感、手触り感においては、木質基材表面の凹凸を生かすために表面に塗布する塗料の塗膜厚は可能な限り薄くすることが望まれる。しかしながら、塗膜を薄くすると、木質板の表面強度が得られず傷つきやすくなり、さらに防汚性が低下するという問題があった。 On the other hand, in terms of the texture and feel on the surface of the wooden board, it is desirable to make the coating film thickness of the coating applied to the surface as thin as possible in order to make use of the irregularities on the surface of the wooden substrate. However, when the coating film is made thin, the surface strength of the wooden board cannot be obtained, and it becomes easy to be damaged, and further, there is a problem that the antifouling property is lowered.
これに対し、塗膜を厚くすることで、表面強度が得られ、傷がつきにくく、防汚性を備えた木質板とすることはできるが、木質板表面の質感、手触り感が失われるという問題があった。 On the other hand, by thickening the coating film, surface strength can be obtained, scratches can be made, and it can be made a wood board with antifouling properties, but the texture and feel of the wood board surface are lost. There was a problem.
このような問題に対し、木質板表面に凹凸を付与するために、粒径の大きな粒子を添加した塗料を塗装することが考えられる。しかしながら、木理によらず粒径の大きな粒子を添加した塗料により凹凸を付与して得られる木質板表面の手触りは、木の性質から乖離したものとなり、違和感を覚えさせるものとなってしまう。 For such problems, it is conceivable to apply a coating material to which particles having a large particle diameter are added in order to provide unevenness on the surface of the wooden board. However, the texture of the surface of the wooden board obtained by imparting irregularities with a paint to which particles having a large particle diameter are added regardless of the wood texture is deviated from the nature of the wood, and makes it feel uncomfortable.
本発明は、以上のとおりの事情に鑑みてなされたものであり、木質基材の表面に塗装を施しても、自然な質感の外観及び木の手触り感が得られる木質板を提供することを課題としている。 The present invention has been made in view of the circumstances as described above, and provides a wooden board that can provide a natural textured appearance and a feel of wood even when the surface of a wooden substrate is coated. It is an issue.
本発明は、上記の課題を解決するために、以下のことを特徴としている。 The present invention is characterized by the following in order to solve the above problems.
即ち、本発明の木質板は、基材の表面に接着された木質系の表面材の表面に塗膜を形成してなる木質板において、塗膜が一方向に並んだ複数の線状の塗料硬化部を有し、前記線状の塗料硬化部が、少なくともチキソトロピー性を有する塗料により形成され、前記チキソトロピー性を有する塗料が、少なくともチキソトロピー剤及び凹凸調整材を添加した塗料であり、前記チキソトロピー剤が超微粒子シリカであり、前記凹凸調整材がスチレン系球状微粒子又はアクリル系球状微粒子であり、前記線状の塗料硬化部の方向が前記表面材の繊維方向と一致しており、前記線状の塗料硬化部の長手方向に対して直交する方向で測定した十点平均粗さRz(JIS B 0601:1994)が10μm以上であることを特徴とする。 That is, the wood board of the present invention is a wood board formed by forming a coating film on the surface of a wood-based surface material bonded to the surface of a substrate, and a plurality of linear paints in which the coating films are arranged in one direction. The thixotropic agent has a curing part, the linear paint curing part is formed of a paint having at least thixotropic property, and the paint having the thixotropic property is a paint to which at least a thixotropic agent and an unevenness adjusting material are added. Is an ultrafine silica , the unevenness adjusting material is a styrene spherical fine particle or an acrylic spherical fine particle, the direction of the linear paint curing portion is coincident with the fiber direction of the surface material, the linear The ten-point average roughness Rz (JIS B 0601: 1994) measured in a direction orthogonal to the longitudinal direction of the paint cured portion is 10 μm or more.
また、本発明の木質板は、木質系の模様を印刷した表面材を表面に有する基材の表面に塗膜を形成してなる木質板において、塗膜が一方向に並んだ複数の線状の塗料硬化部を有し、前記線状の塗料硬化部が、少なくともチキソトロピー性を有する塗料により形成され、前記チキソトロピー性を有する塗料が、少なくともチキソトロピー剤及び凹凸調整材を添加した塗料であり、前記チキソトロピー剤が超微粒子シリカであり、前記凹凸調整材がスチレン系球状微粒子又はアクリル系球状微粒子であり、前記線状の塗料硬化部の方向が前記表面材の模様の方向と一致しており、前記線状の塗料硬化部の長手方向に対して直交する方向で測定した十点平均粗さRz(JIS B 0601:1994)が10μm以上であることを特徴とする。 Further, the wood board of the present invention is a wood board formed by forming a coating film on the surface of a base material having a surface material printed with a wood-based pattern on the surface. The linear paint cured part is formed of a paint having at least thixotropic property, and the paint having the thixotropic property is a paint to which at least a thixotropic agent and an unevenness adjusting material are added, The thixotropic agent is ultrafine silica , the unevenness adjusting material is a styrene spherical fine particle or an acrylic spherical fine particle, and the direction of the linear paint cured portion coincides with the pattern direction of the surface material, The ten-point average roughness Rz (JIS B 0601: 1994) measured in a direction orthogonal to the longitudinal direction of the linear paint cured portion is 10 μm or more.
本発明によれば、木質基材の表面に塗装を施しても、木質基材の木目柄から与えられる印象に対して、違和感を覚えにくい自然な質感の外観及び木の手触り感が得られる木質板を提供することができる。 According to the present invention, even if the surface of the wooden base material is painted, the wood texture that provides a natural textured appearance and a feel of wood that makes it difficult to remember the impression given by the wood grain pattern of the wooden base material. Board can be provided.
以下、本発明の木質板について詳細に説明する。 Hereinafter, the wood board of the present invention will be described in detail.
本発明の木質板は、基材の表面に形成した塗膜が一方向に並んだ複数の線状の塗料硬化部により形成されており、その線状の塗料硬化部の方向が基材表面に接着された表面材の繊維方向または模様と一致しているものである。 The wood board of the present invention is formed by a plurality of linear paint curing portions in which a coating film formed on the surface of the substrate is aligned in one direction, and the direction of the linear paint curing portion is on the substrate surface. It corresponds to the fiber direction or pattern of the bonded surface material.
本発明の木質板で用いられる基材は、通常、床材等に用いられる表面材を表面に有する木質板用の基材(木質基材)であれば特に制限なく、目的の意匠に合致したものを適宜選択して用いることができる。これらの基材の樹種としては、例えば、ブナ、カバ、ナラ等を挙げることができる。 The base material used in the wood board of the present invention is not particularly limited as long as it is a base material for wood board (wood base material) having a surface material used for flooring or the like on the surface, and matches the target design. Those can be appropriately selected and used. Examples of the tree species of these base materials include beech, hippopotamus and oak.
また、本発明で用いる木質基材としては、木材をスライスした木質系の単板や木質系の模様を印刷したオレフィンシート等を、表面材として張り付けた合板やファイバーボード等を用いる。 Further, as the wood substrate used in the present invention, a wood-based veneer obtained by slicing wood, an olefin sheet printed with a wood-based pattern, or the like is used as a surface material.
木質基材の厚みは特に制限されるものではなく、木質板の使用条件に応じて適宜設定することができる。 The thickness of the wood substrate is not particularly limited, and can be appropriately set according to the use conditions of the wood board.
本発明の木質板の表面に形成する一方向に並んだ複数の線状の塗料硬化部は、チキソトロピー性を有する塗料により形成されるものであり、通常公知の塗料に対し、少なくともチキソトロピー剤と凹凸調整材を添加したものが好ましい。 A plurality of linear paint curing portions arranged in one direction formed on the surface of the wood board of the present invention are formed by a paint having thixotropic properties, and at least a thixotropic agent and unevenness with respect to a commonly known paint. What added the adjustment material is preferable.
この塗料のチキソトロピー性の程度としては、塗料が硬化した後の、後述する線状の塗料硬化部の長手方向に対して直交する方向に測定した十点平均粗さRzが10μm以上になるように塗布が可能な程度のものを用いる。 The degree of thixotropy of the paint is such that the ten-point average roughness Rz measured in the direction perpendicular to the longitudinal direction of the linear paint cured portion described later after the paint is cured is 10 μm or more. Use one that can be applied.
本発明で用いる塗料としては、通常木質基材に塗布することができる塗料であれば特に制限なく用いることができ、例えば、熱硬化型塗料、常温硬化型塗料、無溶剤紫外線硬化型塗料等を挙げることができる。これらの中でも特に無溶剤紫外線硬化型塗料を好適に用いることができる。 The coating material used in the present invention can be used without particular limitation as long as it is a coating material that can be normally applied to a woody substrate, for example, a thermosetting coating material, a room temperature curing coating material, a solventless ultraviolet curing coating material, and the like. Can be mentioned. Among these, a solvent-free ultraviolet curable coating can be particularly preferably used.
また、本発明で用いる塗料に添加するチキソトロピー剤としては、通常公知のチキソトロピー剤であれば特に制限なく用いることができ、例えば、シリカ、アルミナ等を挙げることができる。これらの中でも、シリカ、特に超微粒子シリカを好適に用いることができる。 Moreover, as a thixotropic agent added to the coating material used by this invention, if it is a conventionally well-known thixotropic agent, it can be especially used without a restriction | limiting, For example, a silica, an alumina, etc. can be mentioned. Among these, silica, particularly ultrafine particle silica can be suitably used.
チキソトロピー剤の添加量としては、塗料100質量部に対して1〜20質量部、好ましくは3〜10質量部の範囲である。 The amount of the thixotropic agent added is 1 to 20 parts by mass, preferably 3 to 10 parts by mass with respect to 100 parts by mass of the paint.
塗料に対してチキソトロピー剤をこの範囲で添加することにより、塗料のチキソトロピー性を調整し、所望の線状の塗料硬化部を形成することが可能となる。 By adding the thixotropic agent in this range to the paint, it is possible to adjust the thixotropy of the paint and form a desired linear paint cured portion.
また、本発明で用いる塗料に添加する凹凸調整材としては、例えば、スチレン系、アクリル系等の球状微粒子を用いることができる。 Moreover, as the unevenness adjusting material added to the coating material used in the present invention, for example, spherical fine particles such as styrene and acrylic can be used.
凹凸調整材の平均粒子径は、特に限定されるものではないが、通常10〜100μm、好ましくは20〜50μmの範囲である。平均粒子径をこの範囲とすることにより所望の手触り感を得ることが可能となる。 The average particle diameter of the unevenness adjusting material is not particularly limited, but is usually 10 to 100 μm, and preferably 20 to 50 μm. By making the average particle diameter within this range, a desired feel can be obtained.
凹凸調整材の添加量としては、塗料100質量部に対して1〜20質量部、好ましくは3〜10質量部の範囲である。 The addition amount of the unevenness adjusting material is 1 to 20 parts by mass, preferably 3 to 10 parts by mass with respect to 100 parts by mass of the paint.
塗料に凹凸調整材をこの範囲で添加することにより、塗料のチキソトロピー性を調整し線状の塗料硬化部の凹凸形状を調整することが可能となる。 By adding the unevenness adjusting material to the paint within this range, it is possible to adjust the thixotropy of the paint and adjust the uneven shape of the linear paint cured portion.
さらに本発明では、上記の添加剤成分のほかに、本発明の効果を阻害しない範囲において、他の添加剤成分を添加することができる。これらのものとしては顔料、分散剤、界面活性剤等を挙げることができる。 Furthermore, in the present invention, in addition to the above-described additive components, other additive components can be added within a range that does not impair the effects of the present invention. These include pigments, dispersants, surfactants and the like.
本発明において、基材の表面に塗布する塗料は、ベースとなる塗料に対して上記の各添加剤成分を加えて、十分に混練することにより調整することができる。これらの混練には、通常塗料の混練に用いる混練機を用いることができ、これらの中でも特にディスパーを好適に用いることができる。 In the present invention, the coating applied to the surface of the substrate can be adjusted by adding each of the above-mentioned additive components to the base coating and sufficiently kneading. For these kneading, a kneader usually used for kneading a paint can be used, and among these, a disper can be suitably used.
上記のようにして調整した塗料を用いて、基材の表面に接着された表面材が木質系の表面材の場合には、その繊維方向と一致するように、また基材の表面に接着された表面材が木質系の模様を印刷した表面材の場合には、その模様の方向と一致するように線状の塗料硬化部を形成する。 If the surface material adhered to the surface of the base material is a wood-based surface material using the paint prepared as described above, it is adhered to the surface of the base material so that it matches the fiber direction. If the surface material is a surface material on which a woody pattern is printed, a linear paint curing portion is formed so as to coincide with the direction of the pattern.
この形成方法としては、バーコーターを用いる塗布方法や、予め溝を形成させたロールコーターを用いる転写方法、また、インクジェット印刷や、グラビア印刷等の印刷方法を利用することができる。これらの中でも、バーコーターを用いて塗布する方法を好適に用いることができる。 As this forming method, a coating method using a bar coater, a transfer method using a roll coater in which grooves are formed in advance, or a printing method such as ink jet printing or gravure printing can be used. Among these, a method of applying using a bar coater can be suitably used.
チキソトロピー性を高く設定した塗料を用いる場合には、バーコーターやロールコーターを用いることにより、レベリングせず、筋目を保った良好な線状の塗料硬化部を形成することが可能となる。 In the case of using a paint having a high thixotropy, it is possible to form a good linear paint-cured portion that does not level and maintains a streak by using a bar coater or a roll coater.
なお、バーコーターを用いて塗布する場合には、バーコーターの番手を適宜選択することにより所望の線状の塗料硬化部を形成することが可能となる。 In addition, when apply | coating using a bar coater, it becomes possible to form a desired linear paint hardening part by selecting the count of a bar coater suitably.
また、インクジェット印刷やグラビア印刷等の印刷方法を利用する場合には、インクを表面材の表面に密着させることが重要であるが、剥離を防止したり、汚れの除去しやすい表面状態を得るために、印刷により形成された凹凸面上にさらに塗装を行って保護層を形成してもよい。 In addition, when using a printing method such as ink jet printing or gravure printing, it is important to make the ink adhere to the surface of the surface material, but in order to prevent peeling and to obtain a surface state where dirt can be easily removed. In addition, a protective layer may be formed by further coating on the uneven surface formed by printing.
また、インクジェット印刷やグラビア印刷等の印刷方法を利用する場合には、画像解析と組み合わせて、一方向のみでなく、木理や模様と一致した凹凸の付与を制御することも可能となる。 In addition, when a printing method such as ink jet printing or gravure printing is used, it is possible to control the provision of unevenness not only in one direction but also in conformity with a grain or pattern in combination with image analysis.
なお、本発明では、上記の方法により調整した塗料を木質基材に直接塗布することが可能であるが、塗布する前に予め木質基材の表面に下塗り塗装を施しておくこともできる。 In the present invention, it is possible to directly apply the paint prepared by the above method to the wooden substrate, but it is also possible to pre-coat the surface of the wooden substrate in advance before application.
また、塗料の塗布後に、用いた塗料の種類に応じた加熱処理や紫外線処理等の硬化処理を施すことができる。 Moreover, after application | coating of a coating material, hardening processes, such as heat processing according to the kind of used coating material, and an ultraviolet-ray process, can be given.
本発明において、基材の表面に形成する線状の塗料硬化部は、線状の塗料硬化部の長手方向に対して直交する方向に測定した十点平均粗さRzが10μm以上、好ましくは10μm以上、25μm以下の範囲である。 In the present invention, the linear paint cured part formed on the surface of the substrate has a 10-point average roughness Rz measured in a direction orthogonal to the longitudinal direction of the linear paint cured part of 10 μm or more, preferably 10 μm. The range is 25 μm or less.
ここで、十点平均粗さRzは、JIS B0601:1994で定義された表面粗さを意味する。 Here, the ten-point average roughness Rz means the surface roughness defined in JIS B0601: 1994.
線状の塗料硬化部の十点平均粗さがこの範囲であれば、木質板表面の表面材の木目柄から与えられる印象に対して、違和感を覚えにくい自然な質感の外観及び木の手触り感を与える木質板とすることができる。 If the ten-point average roughness of the linear paint cured part is within this range, the natural texture and wood feel that makes it difficult to remember the impression given by the grain pattern of the surface material on the surface of the wooden board It can be a wooden board that gives
なお、上記の塗料によって形成された上記の十点平均粗さを有する本発明の木質板では、木質板の表面に触れた際の冷っとする温冷感(冷っと感)を低減させることができる。 In addition, in the wood board of the present invention having the above-mentioned ten-point average roughness formed by the above-mentioned paint, it reduces the cold feeling (cool feeling) when touching the surface of the wood board. be able to.
通常、物体との接触時に感じる温冷感は、物体への熱の移動量、熱伝導率の大小によって決定されるものである。熱伝導率の大きいものは冷たさを感じ、小さいものは温かみを感じる。また、温冷感は、接触面積と熱伝導率にも依存する。 Usually, the thermal sensation felt when touching an object is determined by the amount of heat transferred to the object and the thermal conductivity. Those with high thermal conductivity feel cold and those with low thermal conductivity feel warm. The thermal sensation also depends on the contact area and the thermal conductivity.
これらのことから、塗装を施した木質板において冷っとする温冷感(冷っと感)は、以下の2点によるものと考えられる。 From these facts, it is considered that the feeling of coldness (coolness) in the painted wooden board is due to the following two points.
1.塗布された塗膜の熱伝導率が木質基材に比べ大きい場合に、接触時に冷たく感じる。
2.木質基材表面の木目の凹凸が塗料により埋められて平滑化し、接触面積が増大するため、熱の移動量が多くなり接触時に冷たく感じる。
1. When the thermal conductivity of the applied coating is larger than that of the wood substrate, it feels cold at the time of contact.
2. Since the unevenness of the grain of the surface of the wood base material is filled with the paint and smoothed, and the contact area increases, the amount of heat transfer increases and it feels cold at the time of contact.
本発明の木質板では、表面に線状の塗料硬化部が形成されているので、接触が線接触となり、接触面積を低減させることができるため、木質板の表面に触れた際の冷っとする温冷感を低減させることができるものである。 In the wood board of the present invention, since the linear paint cured portion is formed on the surface, the contact becomes a line contact, and the contact area can be reduced, so that the cold when touching the surface of the wood board It is possible to reduce the thermal sensation.
また、本発明の木質板では、表面材の表面に塗布する塗料に、シリカ等を主成分とするチキソトロピー剤や、スチレン系、アクリル系等の球状微粒子の凹凸調整材を添加しているので、これらを添加しない場合に比べて熱伝導率を小さくすることができ、より冷っとする温冷感を低減させることができる。 Moreover, in the wood board of the present invention, the thixotropic agent mainly composed of silica or the like, and the concavo-convex regulator of spherical fine particles such as styrene and acrylic are added to the paint applied to the surface of the surface material. Compared with the case where these are not added, the thermal conductivity can be reduced, and the cooler feeling of cooling can be reduced.
以下、実施例により本発明をさらに詳しく説明するが、本発明はこれらの実施例に何ら限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples at all.
(実施例1)
無溶剤紫外線硬化型塗料(ナトコ株式会社製:IST5633)100質量部に、チキソトロピー剤として超微粒子シリカ(日本アエロジル株式会社製:アエロジル200)を5質量部添加し、ディスパーを用いて均一に混練した。
Example 1
5 parts by mass of ultrafine silica (Nippon Aerosil Co., Ltd .: Aerosil 200) as a thixotropic agent was added to 100 parts by mass of a solvent-free UV curable coating (manufactured by NATCO Co., Ltd .: IST5633) and kneaded uniformly using a disper. .
これに、凹凸調整材としてアクリル系球状微粒子(ガンツ化成株式会社製:GB−28、平均粒子径28μm)を5質量部添加して同じくディスパーで混練し塗料を得た。 To this was added 5 parts by mass of acrylic spherical fine particles (manufactured by Ganz Kasei Co., Ltd .: GB-28, average particle size 28 μm) as an unevenness adjusting material, and kneaded with a disper to obtain a paint.
次に、予め下塗り塗装を施した木目があるかばの単板の表面材を表面に接着した針葉樹合板に、上記の方法で得た塗料を、バーコーター(番手:♯20)を用いて木目に沿って塗布し、積算光量500mJ/cm2の条件で硬化させて、木目に沿って凹凸形状を有する塗膜を形成した木質板を得た。 Next, the paint obtained by the above method is applied to the softwood plywood obtained by adhering the surface material of the veneer with the wood grain that has been previously primed to the surface using a bar coater (counter: # 20). And hardened under the condition of an integrated light quantity of 500 mJ / cm 2 to obtain a wood board on which a coating film having an uneven shape was formed along the grain.
(実施例2)
バーコーター(番手:♯36)を用いて塗布した以外は、実施例1と同じ条件で木質板を得た。
(Example 2)
A wood board was obtained under the same conditions as in Example 1 except that coating was performed using a bar coater (counter: # 36).
(実施例3)
バーコーター(番手:♯48)を用いて塗布した以外は、実施例1と同じ条件で木質板を得た。
(Example 3)
A wood board was obtained under the same conditions as in Example 1 except that coating was performed using a bar coater (counter: # 48).
(比較例1)
チキソトロピー剤及び凹凸調整材を添加しなかった以外は、実施例3と同じ条件で木質板を得た。
(Comparative Example 1)
A wood board was obtained under the same conditions as in Example 3 except that the thixotropic agent and the unevenness adjusting material were not added.
(比較例2)
チキソトロピー剤を添加しなかった以外は、実施例3と同じ条件で木質板を得た。
(Comparative Example 2)
A wood board was obtained under the same conditions as in Example 3 except that no thixotropic agent was added.
(塗装アクリル板の作製)
実施例1〜3、比較例1、2で調整した各塗料について、塗膜の表面状態の外観を観察するために、市販のアクリル板に各塗料をバーコータ(番手:♯20)を用いて塗布し、積算光量500mJ/cm2の条件で硬化させて塗装アクリル板を得た。
(Preparation of painted acrylic board)
For each paint prepared in Examples 1 to 3 and Comparative Examples 1 and 2, each paint was applied to a commercially available acrylic plate using a bar coater (counter: # 20) in order to observe the appearance of the surface state of the coating film. And cured under conditions of an integrated light quantity of 500 mJ / cm 2 to obtain a coated acrylic plate.
<評価>
次の方法によって、実施例1〜3、比較例1、2で得た木質板について、十点平均粗さ(Rz)、手触り感及び温冷感を、また、実施例1〜3、比較例1、2で調整した各塗料を塗布した塗装アクリル板について、外観及び縦筋状態を評価した。
<Evaluation>
For the wood boards obtained in Examples 1 to 3 and Comparative Examples 1 and 2 by the following method, the ten-point average roughness (Rz), the feeling of touch, and the thermal sensation, and Examples 1 to 3 and Comparative Examples About the coating acrylic board which apply | coated each coating material adjusted by 1 and 2, the external appearance and the vertical stripe state were evaluated.
(十点平均粗さ(Rz))
表面粗さ測定機(ミツトヨ株式会社製)を用いて、塗料の塗布方向に対して直角方向の十点平均粗さ(Rz)を測定した。
(Ten point average roughness (Rz))
Using a surface roughness measuring machine (manufactured by Mitutoyo Corporation), ten-point average roughness (Rz) in the direction perpendicular to the coating direction of the paint was measured.
(手触り感)
塗装した板の表面を木目に沿って手のひらで3往復して触り、このときのざらつき感を以下の基準で評価した。
○:ざらつき感を感じない。
×:ざらつき感を感じる。
(Feel)
The surface of the painted board was touched by reciprocating three times along the grain with a palm, and the feeling of roughness at this time was evaluated according to the following criteria.
○: A feeling of roughness is not felt.
X: A rough feeling is felt.
(温冷感)
カトーテック株式会社製の精密迅速熱物性測定装置KES−F7(サーモラボII B)を用いて温冷感の評価を行った。具体的には、20℃雰囲気下に静置した塗膜に対し、30℃の温度に設定された、本装置のセンサに付属した面積9cm2、質量9.79gの純銅板を、10gf/cm2で接触させ、純銅板の熱量が塗膜に移動する熱流のピーク値QMAX(W/cm2)を測定した。そして、その値を指標として、以下の基準で評価した。
(Warmth and coolness)
The thermal sensation was evaluated using a precision rapid thermophysical property measuring device KES-F7 (Thermo Lab II B) manufactured by Kato Tech Co., Ltd. Specifically, a pure copper plate having an area of 9 cm 2 and a mass of 9.79 g attached to the sensor of the present apparatus set to a temperature of 30 ° C. was set to 10 gf / cm with respect to the coating film left to stand in a 20 ° C. atmosphere. 2 , and the peak value QMAX (W / cm 2 ) of the heat flow in which the amount of heat of the pure copper plate moves to the coating film was measured. And it evaluated on the following references | standards using the value as a parameter | index.
○:QMAXの値が0.3未満
△:QMAXの値が0.3以上、0.35未満
×:QMAXの値が0.35以上
○: QMAX value is less than 0.3 Δ: QMAX value is 0.3 or more, less than 0.35 ×: QMAX value is 0.35 or more
(外観)
塗装したアクリル板の表面に、縦筋がついているか否かを目視で確認し、以下の基準で評価した。
○:縦筋がついている。
×:縦筋がついていない。
(appearance)
It was visually confirmed whether or not vertical stripes were present on the surface of the coated acrylic plate, and evaluated according to the following criteria.
○: Vertical bars are attached.
X: There are no vertical stripes.
(縦筋状態)
塗装したアクリル板表面の縦筋状態について、目視により以下の基準で評価した。
○:自然な質感の縦筋が形成されている。
×:自然な質感の縦筋が形成されていない。
(Longitudinal state)
The condition of the vertical stripes on the surface of the coated acrylic plate was visually evaluated according to the following criteria.
○: Vertical stripes with natural texture are formed.
X: Vertical stripes with a natural texture are not formed.
上記の十点平均粗さ(Rz)、手触り感及び温冷感、外観及び縦筋状態の各結果を表1に示す。 Table 1 shows the results of the above ten-point average roughness (Rz), touch and thermal feeling, appearance, and vertical stripe state.
表1より、実施例1〜3の木質板は、全ての項目において優れた結果であった。 From Table 1, the wood board of Examples 1-3 was the result excellent in all the items.
これに対して、チキソトロピー剤及び凹凸調整材を添加しなかった比較例1では、十点平均粗さ、温冷感及び縦筋状態が劣っていた。これにより、凹凸調整材が良好な縦筋の形成及び温冷感に寄与していることが確認された。 On the other hand, in Comparative Example 1 in which the thixotropic agent and the unevenness adjusting material were not added, the ten-point average roughness, the thermal sensation, and the vertical stripe state were inferior. Thereby, it was confirmed that the unevenness adjusting material contributes to the formation of good vertical stripes and the thermal sensation.
また、チキソトロピー剤を添加しなかった比較例2では、手触り感及び外観が劣っており、表面には縦筋も形成されなかった。この結果から、本発明の木質板の表面塗装に関してチキソトロピー剤の有効性が確認された。
In Comparative Example 2 in which no thixotropic agent was added, the feel and appearance were inferior, and no vertical streaks were formed on the surface. From this result, the effectiveness of the thixotropic agent was confirmed for the surface coating of the wood board of the present invention.
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