JP2010036138A - Film structure - Google Patents

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JP2010036138A
JP2010036138A JP2008203845A JP2008203845A JP2010036138A JP 2010036138 A JP2010036138 A JP 2010036138A JP 2008203845 A JP2008203845 A JP 2008203845A JP 2008203845 A JP2008203845 A JP 2008203845A JP 2010036138 A JP2010036138 A JP 2010036138A
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thin film
film structure
fine particle
layer
film layer
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JP5304994B2 (en
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Natsuko Nishimura
奈津子 西村
Kentaro Watanabe
健太郎 渡邉
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a film structure in which material characteristics and optical characteristics are clarified in order that a coating film may exercise a posh feeling, and a classy texture equal to Japanese lacquer can be reproduced, for example, by a coating film or the like using a synthetic paint. <P>SOLUTION: The film structure includes a plurality of filmy layers, and is provided with at least one of fine particle-containing filmy layers and at least one of clear filmy layers as the filmy layer formed on a substrate. The fine particle-containing filmy layer contains particles and binder resins, the particles and the binder resins assimilate visually, and the difference of the refraction indexes is 0.005 or more. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば金属などの材料から成る物品の表面に適用され、その表面を保護すると共に、物品の美観を高めるための塗膜に代表される薄膜構造に係わり、特に漆（うるし）のような深み感を備えた高級感を得ることができる薄膜構造に関するものである。   The present invention is applied to the surface of an article made of a material such as a metal, for example, and relates to a thin film structure represented by a coating film for protecting the surface and enhancing the aesthetics of the article. The present invention relates to a thin film structure capable of obtaining a high-class feeling with a deep feeling.

例えば、自動車や、家電製品等への塗装については、防錆性、防汚性、耐候性等の機能に加えて、意匠性が重要となっており、性能に加えて意匠性を高めることが重要なファクターの１つになっている。
また、昨今、自動車市場においても、高級化が要求されており、自動車内装の高級化指向として、その質感向上が求められている。 For example, for painting on automobiles, home appliances, etc., in addition to functions such as rust prevention, antifouling, and weather resistance, design is important, and it is possible to improve design in addition to performance. It is one of the important factors.
In recent years, the automobile market is also required to be upgraded, and there is a demand for improving the quality of the interior of automobiles.

自動車メーカーや材料メーカーは、質感の高い素材として漆材料に注目しているが、漆を構成しているウルシオールが紫外線に弱く、耐候性能が低いといった性能面での問題や、製品として仕上げる迄に約３ヶ月を要するなど生産性上の課題が大きく、これまで内装用部品を初めとした自動車部品に漆材料が適用された事例は報告されていない。   Automakers and material manufacturers are paying attention to lacquer materials as a high-quality material, but the urushiols that make up lacquer are vulnerable to ultraviolet rays and have poor weather resistance, and until they are finished as products. It takes about three months to complete, and there are significant productivity issues, so far there have been no reports of lacquer materials applied to automobile parts such as interior parts.

このような高級感を得るための塗装方法や塗膜構造としては、漆を模した合成塗料（カラークリヤ）を使用して、ベースコートや透明クリヤとウエットオンウエットで塗装したり、ベースコートとウエットオンウエットで塗装し焼付けた透明クリヤの上に塗装したりすることや、特定明度のメタリックベースコートと光透過率を特定した着色クリヤトップコートから成る複層塗膜構造が提案されている（特許文献１〜３参照）。
特開平０３−０１２２６３号公報 特開平０４−０１６２６９号公報 特開平０４−３２６９６４号公報 As a painting method and coating film structure for obtaining such a high-class feeling, a synthetic paint (color clear) simulating lacquer is used, and the base coat or transparent clear is applied with wet on wet, or the base coat and wet on is applied. A multi-layer coating structure has been proposed in which coating is performed on a transparent clear that has been painted and baked with wet, or a metallic base coat having a specific brightness and a colored clear top coat having a specified light transmittance (Patent Document 1). To 3).
Japanese Patent Laid-Open No. 03-012263 Japanese Patent Laid-Open No. 04-016269 Japanese Patent Laid-Open No. 04-326964

しかしながら、上記特許文献に記載の方法や塗膜構造では、通常の塗膜構造に比較すれば、かなりの高級感が得られなくはないものの、さらに優れた深み感を十分に表現できる塗膜構造や塗装方法が望まれている。   However, in the method and the coating film structure described in the above-mentioned patent document, a coating film structure that can sufficiently express a sense of depth even though a considerable high-class feeling cannot be obtained as compared with a normal coating film structure. And painting methods are desired.

すなわち、本発明は、従来の塗装方法や、これによって得られる塗膜構造における上記課題に着目してなされたものであって、その目的とするところは、漆材料による塗膜が高級感をもたらす要因を解析し、高級感を発揮するための材料特性や光学特性を明らかにし、もって漆同等の高級な質感を合成塗料による塗膜などの薄膜構造によって再現することにある。   That is, the present invention has been made by paying attention to the above-mentioned problems in the conventional coating method and the coating film structure obtained thereby, and the purpose is that the coating film made of lacquer material brings a sense of quality. By analyzing the factors and clarifying the material characteristics and optical characteristics for exhibiting a high-class feeling, it is to reproduce a high-quality texture equivalent to lacquer with a thin film structure such as a coating film made of synthetic paint.

本発明者らは、上記目的を達成するため、塗膜材料や添加材料、積層方法などについて鋭意検討を重ねた結果、漆材料における高級感の主要因が視覚的に感じる「深み感」にあることをつきとめ、基材上に形成される上述の薄膜構造が、微粒子含有薄膜層とクリヤ薄膜層を備え、更にこの微粒子含有薄膜層が屈折率の異なる微粒子とバインダー樹脂を含むものとすることで「深み感」が得られ、上記課題が解決できることを見出し、本発明を完成するに到った。   In order to achieve the above object, the present inventors have conducted extensive studies on coating materials, additive materials, lamination methods, etc., and as a result, the main factor of luxury in lacquer material is in a “feel of depth” that is visually felt. As a result, the above-mentioned thin film structure formed on the substrate includes a fine particle-containing thin film layer and a clear thin film layer, and the fine particle-containing thin film layer further includes fine particles having different refractive indexes and a binder resin. It has been found that the above-mentioned problems can be solved, and the present invention has been completed.

すなわち、本発明は上記知見に基づくものであって、本発明の薄膜構造は、複数の薄膜層を有し、基材上に形成され、この薄膜層として少なくとも１層の微粒子含有薄膜層と少なくとも１層のクリヤ薄膜層を備え、また上記微粒子含有薄膜層が微粒子とバインダー樹脂を含み、更に上記微粒子と上記バインダー樹脂とは視覚的に同化し、且つ、屈折率の差が０．００５以上であることを特徴としている。   That is, the present invention is based on the above knowledge, and the thin film structure of the present invention has a plurality of thin film layers and is formed on a substrate, and as this thin film layer, at least one fine particle-containing thin film layer and at least one thin film layer are formed. A clear thin film layer, and the fine particle-containing thin film layer includes fine particles and a binder resin; the fine particles and the binder resin are visually assimilated; and a difference in refractive index is 0.005 or more. It is characterized by being.

本発明によれば、基材上の薄膜構造が、微粒子含有薄膜層とクリヤ薄膜層を備え、更にこの微粒子含有薄膜層が屈折率の異なる微粒子とバインダー樹脂を含むものとすることで深み感を得ることができ、漆同等の質感を合成材料によって再現することができる。 According to the present invention, the thin film structure on the substrate includes a fine particle-containing thin film layer and a clear thin film layer, and the fine particle-containing thin film layer further includes fine particles having different refractive indexes and a binder resin to obtain a sense of depth. It is possible to reproduce the texture equivalent to lacquer with synthetic materials.

以下に、本発明の薄膜構造について、その製造方法などと共に、さらに詳細、かつ具体的に説明する。なお、本明細書中において、「％」は特記しない限り質量百分率を表わすものとする。   Hereinafter, the thin film structure of the present invention will be described in more detail and specifically together with the manufacturing method thereof. In the present specification, “%” represents mass percentage unless otherwise specified.

本発明者らは、世の中に存在する質感が高く、高級感のある物品、すなわち漆製品を初めとした各種の工芸品や工業製品を集め、質感の要素分解を行った結果、質感を形成する要素の中に深み感があることを確認した。そして、この深み感が漆の質感においてどの程度の影響度を持っているかを、先の質感要素分解の際に行った官能評価結果から解析した所、深み感と質感がほぼ同義であって、深み感の向上が質感向上に大きく貢献することを確認した。そして、この深み感を解明するため、実験計画法を用いて材料特性や光学特性を変化させた塗膜の作製及び官能評価を繰り返し、深み感を再現するための材料特性、塗膜構成を明らかにした。   The present inventors gathered various crafts and industrial products, such as lacquer products, which have a high texture and high quality that exist in the world, and formed a texture as a result of disassembling the texture. It was confirmed that there was a feeling of depth in the element. And the degree of influence that this feeling of depth has on the texture of lacquer was analyzed from the sensory evaluation results performed at the time of the previous texture element decomposition, the feeling of depth and texture are almost synonymous, It was confirmed that the improvement of the sense of depth greatly contributes to the improvement of the texture. In order to elucidate this feeling of depth, we repeated the preparation and sensory evaluation of coatings with varying material properties and optical properties using experimental design methods, and revealed the material properties and coating composition to reproduce the feeling of depth. I made it.

本発明の薄膜構造においては、上記したように、複数の薄膜層を有し、この薄膜層として少なくとも１層の微粒子含有薄膜層と、少なくとも１層のクリヤ薄膜層を備え、また上記微粒子含有薄膜層が微粒子とバインダー樹脂を含み、更に上記微粒子と上記バインダー樹脂とは視覚的に同化し、且つ、屈折率の差が０．００５以上となるようにしたことから、薄膜構造内で光の複雑な屈折が生じ、漆同等の深み感、質感を得ることができる。
本発明の薄膜構造は、典型的には塗料として基材上に塗布することによって形成される塗膜構造に代表されるが、必ずしも塗膜構造のみに限定されることはなく、例えば樹脂フィルムから構成することも可能である。 The thin film structure of the present invention has a plurality of thin film layers as described above, and includes at least one fine particle-containing thin film layer and at least one clear thin film layer as the thin film layer. Since the layer contains fine particles and a binder resin, the fine particles and the binder resin are visually assimilated, and the difference in refractive index is 0.005 or more, so that the complexity of light within the thin film structure. Refraction occurs, and the depth and texture equivalent to lacquer can be obtained.
The thin film structure of the present invention is typically represented by a coating film structure formed by applying it as a paint on a substrate, but is not necessarily limited to only a coating film structure, for example, from a resin film It is also possible to configure.

図１（ａ）〜（ｆ）に、本発明のいくつかの実施形態を示す。これらの図に示されるように、基材Ｂ上に形成された本発明の薄膜構造は２層以上の薄膜層を有し、該薄膜層として１層以上の微粒子含有薄膜層１０と、１層以上のクリヤ薄膜層２０を備える。また着色層３０を有する場合もある。   1 (a) to 1 (f) show several embodiments of the present invention. As shown in these drawings, the thin film structure of the present invention formed on the substrate B has two or more thin film layers, and the thin film layer includes one or more fine particle-containing thin film layers 10 and one layer. The clear thin film layer 20 is provided. Further, there may be a colored layer 30.

本発明の薄膜構造では、微粒子含有薄膜層１０とクリヤ薄膜層２０が積層される順番は特に限定されるものではなく、例えば、クリヤ薄膜層２０が積層される位置は、図１（ａ）、（ｂ）に示すように薄膜構造の最表面のみであっても、図１（ｄ）、（ｆ）に示すように最表面以外の層のみであっても、図１（ｃ）、（ｅ）に示すようにその両方であってもよいが、薄膜構造の最表面にクリヤ薄膜層を備えることが好ましい。深み感をより向上させることができるからである。また、図１（ｃ）、（ｅ）に示すように、最表面のクリヤ薄膜層に加え、薄膜構造内部に少なくとも１層のクリヤ薄膜層を備えることがさらに好ましい。光の屈折の複雑さが増し、またさらに深み感を向上させる効果が得られるからである。 In the thin film structure of the present invention, the order in which the fine particle-containing thin film layer 10 and the clear thin film layer 20 are laminated is not particularly limited. For example, the position where the clear thin film layer 20 is laminated is shown in FIG. Even if it is only the outermost surface of the thin film structure as shown in FIG. 1B or only the layer other than the outermost surface as shown in FIGS. 1D and 1F, FIG. Both of them may be used as shown in FIG. 2), but it is preferable to provide a clear thin film layer on the outermost surface of the thin film structure. This is because the sense of depth can be further improved. Further, as shown in FIGS. 1C and 1E, it is further preferable to provide at least one clear thin film layer inside the thin film structure in addition to the clear thin film layer on the outermost surface. This is because the complexity of refraction of light increases and the effect of further improving the depth feeling can be obtained.

薄膜構造全体の厚さに対する上記微粒子含有薄膜層１０の合計の厚さは１〜７５％が好ましく、１〜５０％がさらに好ましい。さらに薄膜構造内での光の屈折をより複雑なものとし、より高度な深み感を得るためには、微粒子含有薄膜層の厚さを厚くしたり、層数を多くしたりすることが好ましい。 The total thickness of the fine particle-containing thin film layer 10 with respect to the thickness of the entire thin film structure is preferably 1 to 75%, more preferably 1 to 50%. Furthermore, in order to make the light refraction in the thin film structure more complicated and to obtain a higher level of depth, it is preferable to increase the thickness of the fine particle-containing thin film layer or increase the number of layers.

ここで「微粒子含有薄膜層」とは、微粒子Ｐとバインダー樹脂Ｒを含む薄膜層であり、必要に応じてさらに顔料、光輝材、添加剤等を含むことができる。通常、これらの微粒子及び顔料、光輝材、添加剤等は上記バインダー樹脂中に分散されている。また「微粒子含有薄膜層」を塗膜として形成した場合には、使用した溶剤が薄膜層中に若干残存することもあり得る。 Here, the “fine particle-containing thin film layer” is a thin film layer containing the fine particles P and the binder resin R, and may further contain a pigment, a glittering material, an additive and the like as necessary. Usually, these fine particles, pigments, glittering materials, additives and the like are dispersed in the binder resin. Further, when the “fine particle-containing thin film layer” is formed as a coating film, the used solvent may remain in the thin film layer.

上記微粒子としては、水性でも溶剤系でも使用が可能であり、例えば、一般に塗膜形成樹脂として用いられる樹脂を使用することができる。具体的には、アクリル樹脂、塩ビ酢ビ共重合樹脂、ウレタン樹脂、ポリエステル樹脂、セルロース樹脂、ポリスチレン樹脂などから形成される微粒子や樹脂ビーズなどを挙げることができる。なお、当該微粒子は、１層であっても、２層以上の構造であっても良い。また、中空（中に空気の層や空間がある）であっても良い。
これらの微粒子の最大粒径は、設計する薄膜構造にもよるが、一般的には５０μｍ以下であることが好ましく、１ｎｍ〜２０μｍであることがより好ましい。５０μｍを超えると、塗膜を積層する際に塗膜平面に凹凸ができ、深み感に悪影響を及ぼす場合がある。
また、微粒子含有薄膜層中に占める微粒子の割合は、樹脂固形分比率濃度で０．１％〜５％の範囲であることが好ましい。０．１％未満では微粒子添加による深み感向上効果が十分に得られない場合があり、５％を超えると塗膜が白濁するという不都合が生じる傾向がある。 As the above-mentioned fine particles, both aqueous and solvent-based ones can be used. For example, a resin generally used as a film-forming resin can be used. Specific examples include fine particles and resin beads formed from acrylic resin, polyvinyl chloride vinyl acetate copolymer resin, urethane resin, polyester resin, cellulose resin, polystyrene resin, and the like. The fine particles may have a single layer or a structure having two or more layers. Moreover, it may be hollow (there is an air layer or space inside).
Although the maximum particle diameter of these fine particles depends on the designed thin film structure, it is generally preferably 50 μm or less, more preferably 1 nm to 20 μm. When the thickness exceeds 50 μm, unevenness may be formed on the plane of the coating film when laminating the coating film, which may adversely affect the feeling of depth.
The proportion of fine particles in the fine particle-containing thin film layer is preferably in the range of 0.1% to 5% in terms of the resin solid content ratio concentration. If it is less than 0.1%, the effect of improving the depth feeling due to the addition of fine particles may not be sufficiently obtained. If it exceeds 5%, there is a tendency that the coating film becomes cloudy.

上記バインダー樹脂としては、水性でも溶剤系でも使用することができ、代表的には、一般に塗膜形成樹脂として用いられている樹脂を用いることができる。具体的には、アクリル樹脂、塩ビ酢ビ共重合樹脂、ウレタン樹脂、ポリエステル樹脂、セルロース樹脂、ポリスチレン樹脂などの樹脂を挙げることができる。
また、その添加剤として、ポリエチレンワックス、ポリプロピレンワックスなどのワックス類や、分散剤、湿潤剤、消泡剤、表面調整剤、増粘剤、レオロジーコントロール剤等を使用することができる。 As the binder resin, either a water-based or solvent-based resin can be used, and typically, a resin generally used as a film-forming resin can be used. Specific examples include resins such as acrylic resins, polyvinyl chloride vinyl chloride copolymer resins, urethane resins, polyester resins, cellulose resins, and polystyrene resins.
In addition, waxes such as polyethylene wax and polypropylene wax, dispersants, wetting agents, antifoaming agents, surface conditioners, thickeners, rheology control agents, and the like can be used as additives.

なお、上記溶剤としては、水や芳香族炭化水素系溶剤、エステル系溶剤、ケトン系溶剤、アルコール系溶剤、エーテル系溶剤等の炭化水素系溶剤等の有機溶剤が挙げられる。また顔料、微粒子、光輝材などが、例えばペースト状の市販品として添加される場合には、このペースト中に含有される溶剤が含まれることもある。 Examples of the solvent include organic solvents such as hydrocarbon solvents such as water, aromatic hydrocarbon solvents, ester solvents, ketone solvents, alcohol solvents, and ether solvents. In addition, when pigments, fine particles, glittering materials, and the like are added as, for example, a paste-like commercial product, a solvent contained in the paste may be included.

また「微粒子含有薄膜層」においては、上記微粒子と上記バインダー樹脂とは視覚的に同化している。即ち、バインダー樹脂に分散された微粒子の境界面が視認されないため、視覚的な滑らかさが担保されている。さらに、該微粒子と該バインダー樹脂の屈折率の差は、０．００５以上である。微粒子とバインダー樹脂の屈折率差は、大きければ大きい程好ましいが、少なくとも０．００５以上の差があれば、深み感向上に効果が認められる。この時、バインダー樹脂よりも微粒子の屈折率が小さい方が、光路長がより長くなり、深み感がより向上することから、バインダー樹脂より微粒子の屈折率が小さい方が好ましい。   In the “fine particle-containing thin film layer”, the fine particles and the binder resin are visually assimilated. That is, since the boundary surface of the fine particles dispersed in the binder resin is not visually recognized, visual smoothness is ensured. Furthermore, the difference in refractive index between the fine particles and the binder resin is 0.005 or more. The larger the difference in the refractive index between the fine particles and the binder resin, the better. However, if there is a difference of at least 0.005 or more, an effect for improving the feeling of depth is recognized. At this time, it is preferable that the refractive index of the fine particles is smaller than that of the binder resin because the optical path length is longer and the sense of depth is further improved when the refractive index of the fine particles is smaller than that of the binder resin.

一方、「クリヤ薄膜層」は、無色又は有色の透明な薄膜層であり、下方に積層された薄膜層などを隠蔽しない。クリヤ薄膜層を塗膜として形成する場合には、一般的なクリヤ塗料である水性塗料、溶剤型塗料、粉体塗料等を用いることによって、クリヤ塗膜や、半透明感を付与したいわゆる濁りクリヤ塗膜を得ることができる。水性や溶剤型の塗料としては、一液型塗料を用いてもよいし、二液型ウレタン樹脂塗料のような二液型樹脂を用いてもよい。 On the other hand, the “clear thin film layer” is a colorless or colored transparent thin film layer and does not conceal the thin film layer laminated below. When the clear thin film layer is formed as a coating film, a clear coating film or a so-called turbid clear coating imparting a translucent feeling can be obtained by using a water-based paint, a solvent-type paint, a powder paint, etc., which are general clear paints. A coating film can be obtained. As a water-based or solvent-type paint, a one-component paint may be used, or a two-component resin such as a two-component urethane resin paint may be used.

上述の「微粒子含有薄膜層」及び「クリヤ薄膜層」は着色材を含有することができる。薄膜構造に含まれるこれらの薄膜層のうち、着色材を含有する層は、一層であってもよいし、二層以上であってもよい。着色材含有薄膜層を二層以上備える薄膜構造においては、着色材を含む全ての層の着色材濃度が同じであってもよいし、いくつかの層の着色材濃度が同じであってもよいし、着色材を含む全ての層の着色材濃度が異なっていてもよいが、少なくとも２層の薄膜層の間で、着色材濃度が異なることが好ましい。深み感がより向上するからである。
さらに、積層された全ての薄膜層において、下層に向かうほど着色材濃度が濃くなる濃度勾配や、上層および下層のどちらかの薄膜に濃度のかたよりを持つ濃度勾配を有することがより好ましい。また深み感を向上させる目的だけではなく、求められる意匠に応じて、着色材の濃度勾配を適宜設定することが可能である。
なお、着色材としては、顔料、染料と共に、着色光輝材を初めとする各種の光輝材を用いることができる。なお、光輝材としては、アルミニウムやマイカ（雲母）、ガラスなどの粉末を使用することができる。また、粉砕した二酸化チタンや酸化鉄などの鉱物や、ガラス表面に酸化被膜や顔料膜を形成したものやモルフォ繊維なども用いることができる。 The above-mentioned “fine particle-containing thin film layer” and “clear thin film layer” can contain a coloring material. Among these thin film layers included in the thin film structure, the layer containing the coloring material may be a single layer or two or more layers. In a thin film structure including two or more colorant-containing thin film layers, the colorant concentrations of all layers including the colorant may be the same, or the colorant concentrations of several layers may be the same. However, although the colorant concentrations of all the layers including the colorant may be different, it is preferable that the colorant concentration is different between at least two thin film layers. This is because the sense of depth is further improved.
Further, it is more preferable that all the laminated thin film layers have a concentration gradient in which the colorant concentration increases toward the lower layer, or a concentration gradient that depends on the concentration of the upper or lower thin film. In addition to the purpose of improving the sense of depth, it is possible to appropriately set the concentration gradient of the coloring material according to the required design.
In addition, as a coloring material, various bright materials including a colored bright material can be used together with a pigment and a dye. As the bright material, powders such as aluminum, mica (mica), and glass can be used. In addition, pulverized minerals such as titanium dioxide and iron oxide, those in which an oxide film or pigment film is formed on the glass surface, morpho fiber, and the like can also be used.

また、薄膜構造に含まれる薄膜層のうち、少なくとも２層の間、例えば微粒子含有薄膜層とクリヤ薄膜層との間、微粒子含有薄膜層同士の間、クリヤ薄膜層同士の間で、屈折率が異なることが好ましい。深み感がより向上するからである。これらの屈折率の違いは、各層を構成する樹脂の種類を変えることによって実現できる。例えば、微粒子含有薄膜層間においては、これらの層に含まれるバインダー樹脂を屈折率の異なる樹脂とすることで、層全体の屈折率を相違させることもできる。   Further, among the thin film layers included in the thin film structure, the refractive index is between at least two layers, for example, between the fine particle-containing thin film layer and the clear thin film layer, between the fine particle-containing thin film layers, and between the clear thin film layers. Preferably they are different. This is because the sense of depth is further improved. These differences in refractive index can be realized by changing the type of resin constituting each layer. For example, between the fine particle-containing thin film layers, the refractive index of the entire layer can be made different by making the binder resin contained in these layers a resin having a different refractive index.

さらに本発明の薄膜構造においては、最下層、すなわち上記基材との接触面に着色層を備えることが好ましい。該着色層は、着色材を基材にスプレー塗装すること等によって得ることができるが、特に木目のような凹凸を備える材料を基材とする場合には、スプレー塗装のみによるよりも、着色材を刷り込んだ後、スプレー塗装によって着色層を得ることがより好ましい。木目のような凹凸の上に着色材を刷り込むことによって、スプレー塗装以上に凹凸の立体感が際立ち、光の屈折がより複雑になり、深み感を向上させる効果を与えることができるからである。
この着色層に用いる着色材としては、顔料、染料と共に、着色光輝材を初めとする各種の光輝材を用いることができる。なお、光輝材としては、アルミニウムやマイカ（雲母）、ガラスなどの粉末を使用することができる。また、粉砕した二酸化チタンや酸化鉄などの鉱物や、ガラス表面に酸化被膜や顔料膜を形成したものやモルフォ繊維なども用いることができる。 Furthermore, in the thin film structure of this invention, it is preferable to provide a colored layer in the lowest layer, ie, a contact surface with the said base material. The colored layer can be obtained by spray-coating a coloring material on a base material, etc. In particular, when a material having irregularities such as wood grain is used as a base material, the coloring material is more than by spray coating alone. It is more preferable to obtain a colored layer by spray coating after imprinting. This is because by imprinting the coloring material on the unevenness such as the grain, the three-dimensional effect of the unevenness becomes more conspicuous than spray coating, the light refraction becomes more complicated, and the effect of improving the sense of depth can be provided.
As the coloring material used in the colored layer, various bright materials such as colored bright materials can be used together with pigments and dyes. As the bright material, powders such as aluminum, mica (mica), and glass can be used. In addition, pulverized minerals such as titanium dioxide and iron oxide, those in which an oxide film or pigment film is formed on the glass surface, morpho fiber, and the like can also be used.

またさらに、本発明の薄膜構造が２層構造の場合には、下層又は上層の薄膜層の光透過率（全光線透過率）が他方の全光線透過率よりも高いことが好ましく、３層以上の積層構造の場合には、最上層又は最下層の全光線透過率が他方の全光線透過率よりも高いことが好ましい。また基材表面、例えば木製基材の本木目が薄膜構造を通して視認できることが望ましいが、そのために薄膜構造全体の全光線透過率が５％以上であることが好ましく、１０％以上であることがより好ましい。 Furthermore, when the thin film structure of the present invention has a two-layer structure, the light transmittance (total light transmittance) of the lower layer or the upper thin film layer is preferably higher than the other total light transmittance, and preferably three or more layers. In the case of the laminated structure, it is preferable that the total light transmittance of the uppermost layer or the lowermost layer is higher than the other total light transmittance. In addition, it is desirable that the surface of the base material, for example, the main grain of the wooden base material, can be visually recognized through the thin film structure. Therefore, the total light transmittance of the entire thin film structure is preferably 5% or more, more preferably 10% or more. preferable.

以上説明してきたように本発明の薄膜構造は、複数の薄膜層が積層されており、どの様な塗色（色相）にも対応が可能である。   As described above, the thin film structure of the present invention has a plurality of thin film layers laminated, and can be applied to any coating color (hue).

以下、本発明を実施例に基づいて具体的に説明する。なお、本発明は、これら実施例によって何ら限定されるものではない。   Hereinafter, the present invention will be specifically described based on examples. In addition, this invention is not limited at all by these Examples.

図２に示すように、基材Ｂの上の微粒子含有薄膜層を第１の微粒子含有薄膜層１０ａとし、その上に必要に応じて、第２の微粒子含有薄膜層１０ｂ、第３の微粒子含有薄膜層１０ｃをスプレー塗装した。またクリヤ薄膜層２０ａについては、積層された微粒子含有薄膜層の層間又は最上層に形成した。さらに必要に応じて基材Ｂとの接触面に着色層３０ａを形成し、薄膜構造を得た。以下に工程を詳述する。 As shown in FIG. 2, the fine particle-containing thin film layer on the base material B is a first fine particle-containing thin film layer 10a, and a second fine particle-containing thin film layer 10b and a third fine particle-containing film are formed thereon as necessary. The thin film layer 10c was spray-coated. Further, the clear thin film layer 20a was formed in the interlayer or uppermost layer of the laminated fine particle-containing thin film layers. Furthermore, the colored layer 30a was formed in the contact surface with the base material B as needed, and the thin film structure was obtained. The process will be described in detail below.

〔赤色顔料の調製〕
アクリル樹脂「アクリディック」（大日本インキ化学工業製）を１００部、赤顔料「Ｐｅｒｍａｎｅｎｔ ＲＥＤ ＦＧＲ」（クラリアント製）を１０部、分散剤「フローレンＧ−７００」（共栄社化学製）を５部、酢酸エチル２３０部を混合した後、３５０部のアルミナビーズ（粒径１ｍｍ）を入れて、ＴＫオートホモミキサー（特殊機化工業製）により２時間分散を行い、平均粒径１２０ｎｍまで微細化した赤顔料を得た。 (Preparation of red pigment)
100 parts of acrylic resin “Acridic” (Dainippon Ink Chemical Co., Ltd.), 10 parts of red pigment “Permanent RED FGR” (manufactured by Clariant), 5 parts of dispersant “Floren G-700” (manufactured by Kyoeisha Chemical), After mixing 230 parts of ethyl acetate, 350 parts of alumina beads (particle size: 1 mm) were added and dispersed for 2 hours with a TK auto homomixer (manufactured by Tokushu Kika Kogyo Co., Ltd.). A pigment was obtained.

〔バインダー樹脂〕
微粒子含有薄膜層に用いるバインダー樹脂としては、屈折率が異なる次の２種類のものをそれぞれ使用した。
（１）日立化成製溶剤アクリル樹脂系ＦＡ−１２５Ｍ（屈折率１．４５）
（２）日立化成製ジシクロペンタニルアクリレート樹脂系ＦＡ−５１３Ａ（屈折率１．４９） [Binder resin]
As the binder resin used for the fine particle-containing thin film layer, the following two types having different refractive indexes were used.
(1) Hitachi Chemical solvent acrylic resin FA-125M (refractive index 1.45)
(2) Hitachi Chemical's dicyclopentanyl acrylate resin FA-513A (refractive index 1.49)

〔微粒子〕
微粒子含有薄膜層に用いる微粒子としては、屈折率が異なる次の２種類の樹脂ビーズをそれぞれ使用した。
（１）宇部日東化成製シリコンアルキド樹脂ハイプレシカＵＦ（屈折率１．４５）
（２）綜研化学製ケミスノーＭＲ（屈折率１．４９） [Fine particles]
As the fine particles used in the fine particle-containing thin film layer, the following two types of resin beads having different refractive indexes were used.
(1) Ube Nitto Kasei Silicon Alkyd Resin High Plessica UF (refractive index 1.45)
(2) Chemisnow MR (refractive index: 1.49) manufactured by Soken Chemical

〔クリヤ塗料〕
クリヤ薄膜層に用いるクリヤ塗料としては、屈折率が異なる次の２種類のものをそれぞれ使用した。
（１）日立化成製溶剤アクリル樹脂系ＦＡ−１２５Ｍ（屈折率１．４５）
（２）ＢＡＳＦコーティングスジャパン製プライマックス８５００（屈折率１．５４） [Clear paint]
As the clear paint used for the clear thin film layer, the following two types having different refractive indexes were used.
(1) Hitachi Chemical solvent acrylic resin FA-125M (refractive index 1.45)
(2) Primemax 8500 manufactured by BASF Coatings Japan (refractive index: 1.54)

〔着色層用材料〕
着色層の樹脂材料として日本ビーケミカル製アクリルウレタン系カラーベースを使用した。 [Colored layer material]
An acrylic urethane color base manufactured by Nippon Bee Chemical was used as the resin material for the colored layer.

〔基材〕
基材としては次の２種類の基材をそれぞれ使用した。
（１）リン酸亜鉛で処理した厚み０．８ｍｍ、７０ｍｍ×１５０ｍｍのダル鋼板に、乾燥膜厚が２０μｍとなるように、カチオン電着塗料（日本ペイント社製「パワートップＵ６００Ｍ」）を電着塗装して１６０℃で３０分間焼き付けた後、中塗り塗料（日本油脂社製「ハイエピコーＱＸ１」）を３０μｍの厚さとなるように塗装し、１４０℃で３０分間焼き付けた基材
（２）本木目を有する基材 〔Base material〕
As the substrate, the following two types of substrates were used.
(1) Electrodeposition of a cationic electrodeposition paint (“Power Top U600M” manufactured by Nippon Paint Co., Ltd.) on a 0.8 mm, 70 mm × 150 mm thick steel plate treated with zinc phosphate so that the dry film thickness is 20 μm. After coating and baking at 160 ° C. for 30 minutes, an intermediate coating (“HIEPICOR QX1” manufactured by NOF Corporation) was applied to a thickness of 30 μm and baked at 140 ° C. for 30 minutes. Base material having

〔積層塗膜試料（薄膜構造）の作製〕
上記基材の表面に、微粒子含有薄膜層とクリヤ薄膜層を含む積層塗膜（薄膜構造）を形成した。微粒子含有薄膜層は、必要に応じて上記により調整した赤顔料を添加した塗料をスプレー塗装した。クリヤ薄膜層は、上記クリヤ塗料のいずれかを使用して、乾燥膜厚が３０μｍ又は４０μｍとなるようにスプレー塗装した。これらの塗装後、１４０℃で３０分間焼き付けた。
なお、微粒子含有薄膜層の上記塗料としては以下の材料を使用し、実施例１〜５及び比較例１〜２の薄膜構造を得た。 [Production of laminated coating film sample (thin film structure)]
A laminated coating film (thin film structure) including a fine particle-containing thin film layer and a clear thin film layer was formed on the surface of the substrate. The fine particle-containing thin film layer was spray-coated with a paint added with a red pigment adjusted as described above as necessary. The clear thin film layer was spray-coated using any of the above clear paints so that the dry film thickness was 30 μm or 40 μm. After these coatings, baking was performed at 140 ° C. for 30 minutes.
In addition, the following materials were used as the said coating material of a fine particle containing thin film layer, and the thin film structure of Examples 1-5 and Comparative Examples 1-2 was obtained.

〔実施例１：図２（ａ）参照〕
微粒子含有薄膜層１０ａとして、屈折率１．４９のバインダー樹脂（２）に対して、上記赤顔料は添加せず、屈折率１．４５（屈折率差：０．０４）、最大粒子径１０μｍの微粒子（１）を樹脂固形分比率濃度が５％となるよう添加した塗料を、乾燥膜厚が３０μｍとなるように基材（１）上にスプレー塗装したのち、クリヤ塗料（２）を用いて乾燥膜厚が４０μｍとなるようにクリヤ薄膜層２０ａを形成し、図２（ａ）に示す薄膜構造を得た。 [Example 1: See FIG. 2 (a)]
As the fine particle-containing thin film layer 10a, the red pigment is not added to the binder resin (2) having a refractive index of 1.49, the refractive index is 1.45 (refractive index difference: 0.04), and the maximum particle diameter is 10 μm. After spray coating the base material (1) so that the dry film thickness is 30 μm, the paint in which the fine particles (1) are added so that the resin solid content ratio concentration is 5% is used, and then the clear paint (2) is used. The clear thin film layer 20a was formed so that the dry film thickness was 40 μm, and the thin film structure shown in FIG.

〔実施例２：図２（ｂ）参照〕
微粒子含有薄膜層１０ａとして、屈折率１．４９のバインダー樹脂（２）に対して、上記赤顔料を樹脂固形分比率濃度が４％になるよう添加すると共に、屈折率１．４５（屈折率差：０．０４）、最大粒子径１０μｍの微粒子（１）を樹脂固形分比率濃度が５％となるよう添加した塗料を、乾燥膜厚が１０μｍとなるように基材（１）上にスプレー塗装した。次に、微粒子含有薄膜層１０ｂとして、上記バインダー樹脂（２）に対して、上記赤顔料を樹脂固形分比率濃度が０．８％になるよう添加すると共に、上記微粒子（１）を同様に添加した塗料を、乾燥膜厚が１０μｍとなるようにスプレー塗装した。さらに、微粒子含有薄膜層１０ｃとして、上記赤顔料の樹脂固形分比率濃度が０．２％になるよう調製し、微粒子（１）を樹脂固形分比率濃度が５％となるように添加した塗料を乾燥膜厚が１０μｍとなるようにスプレー塗装したのち、クリヤ塗料（２）を用いて乾燥膜厚が４０μｍとなるようにクリヤ薄膜層２０ａを形成し、図２（ｂ）に示す薄膜構造を得た。 [Example 2: See FIG. 2 (b)]
As the fine particle-containing thin film layer 10a, the red pigment is added to the binder resin (2) having a refractive index of 1.49 so that the resin solid content ratio concentration becomes 4%, and the refractive index is 1.45 (refractive index difference). : 0.04), and a paint in which fine particles (1) having a maximum particle size of 10 μm are added so that the resin solid content ratio concentration is 5% is spray-coated on the substrate (1) so that the dry film thickness is 10 μm. did. Next, as the fine particle-containing thin film layer 10b, the red pigment is added to the binder resin (2) so that the resin solid content ratio is 0.8%, and the fine particle (1) is added in the same manner. The applied paint was spray-coated so that the dry film thickness was 10 μm. Further, as the fine particle-containing thin film layer 10c, a paint in which the resin solid content ratio concentration of the red pigment is adjusted to 0.2%, and the fine particle (1) is added so that the resin solid content ratio concentration is 5%. After spray coating so that the dry film thickness becomes 10 μm, the clear thin film layer 20 a is formed using the clear paint (2) so that the dry film thickness becomes 40 μm, and the thin film structure shown in FIG. 2B is obtained. It was.

〔実施例３：図２（ｃ）参照〕
上記着色層用材料に対して、上記赤顔料を樹脂固形分比率濃度が０．５％となるように添加して調製した塗料を用いて本木目を有する基材（２）上に刷り込みを実施し、その後スプレー塗装を実施して着色層３０ａとした。この着色層上に、微粒子含有薄膜層１０ａとして、屈折率１．４９のバインダー樹脂（２）に対して、最大粒子径１０μｍ、屈折率１．４５の微粒子（１）を樹脂固形分比率濃度が１％となるよう添加した塗料を乾燥膜厚が１０μｍとなるようにスプレー塗装したのち、クリヤ塗料（２）を用いて乾燥膜厚が４０μｍとなるようにクリヤ薄膜層２０ａを形成し、図２（ｃ）に示す薄膜構造を得た。 [Example 3: See FIG. 2 (c)]
Imprinting on the base material (2) having the main grain using a paint prepared by adding the red pigment to the colored layer material so that the resin solid content ratio concentration is 0.5%. After that, spray coating was performed to obtain a colored layer 30a. On this colored layer, as a fine particle-containing thin film layer 10a, a fine particle (1) having a maximum particle diameter of 10 μm and a refractive index of 1.45 is added to the binder resin (2) having a refractive index of 1.49. After the paint added so as to be 1% is spray-coated so that the dry film thickness is 10 μm, the clear thin film layer 20a is formed using the clear paint (2) so that the dry film thickness is 40 μm. The thin film structure shown in (c) was obtained.

〔実施例４：図２（ｄ）参照〕
上記着色層用材料に対して、上記赤顔料を樹脂固形分比率濃度が０．５％となるように添加して調製した塗料を用いて本木目を有する基材（２）上に刷り込みを実施し、その後スプレー塗装を実施して着色層３０ａとした。この着色層上に、微粒子含有薄膜層１０ａとして、屈折率１．４５のバインダー樹脂（１）に対して、上記赤顔料を樹脂固形分比率濃度が０．８％になるよう添加すると共に、屈折率１．４９（屈折率差：０．０４）、最大粒子径１０μｍの微粒子（２）を樹脂固形分比率濃度が１％となるよう添加した塗料を、乾燥膜厚が１０μｍとなるようにスプレー塗装したのち、クリヤ塗料（１）を用いて乾燥膜厚が３０μｍとなるようにクリヤ薄膜層２０ａを形成した。さらに、微粒子含有薄膜層１０ｂとして、上記赤顔料の樹脂固形分比率濃度が０．８％になるよう調製し、微粒子（２）を樹脂固形分比率濃度が１％となるように添加した塗料を乾燥膜厚が１０μｍとなるようにスプレー塗装し、図２（ｄ）に示す薄膜構造を得た。 [Example 4: Refer to FIG. 2 (d)]
Imprinting on the base material (2) having the main grain using a paint prepared by adding the red pigment to the colored layer material so that the resin solid content ratio concentration is 0.5%. After that, spray coating was performed to obtain a colored layer 30a. On the colored layer, the red pigment is added as a fine particle-containing thin film layer 10a to the binder resin (1) having a refractive index of 1.45 so that the resin solid content ratio concentration is 0.8%. Sprayed with a paint in which fine particles (2) having a refractive index of 1.49 (refractive index difference: 0.04) and a maximum particle diameter of 10 μm are added so that the resin solid content ratio concentration is 1% so that the dry film thickness is 10 μm. After coating, a clear thin film layer 20a was formed using a clear paint (1) so that the dry film thickness was 30 μm. Furthermore, as the fine particle-containing thin film layer 10b, a paint in which the resin solid content ratio concentration of the red pigment is adjusted to 0.8% and the fine particle (2) is added so that the resin solid content ratio concentration is 1%. The thin film structure shown in FIG. 2D was obtained by spray coating so that the dry film thickness was 10 μm.

〔実施例５：図２（ｄ）参照〕
上記着色層用材料に対して、上記赤顔料を樹脂固形分比率濃度が０．５％となるように添加して調製した塗料を用いて本木目を有する基材（２）上にスプレー塗装を実施して着色層３０ａとした。この着色層上に、実施例４と同様の方法で微粒子含有薄膜層１０ａ、クリヤ薄膜層２０ａ、微粒子含有薄膜層１０ｂを形成し、図２（ｄ）に示す薄膜構造を得た。 [Example 5: See FIG. 2 (d)]
Spray coating is performed on the base material (2) having a main grain using a paint prepared by adding the red pigment to the colored layer material so that the resin solid content ratio concentration is 0.5%. The colored layer 30a was implemented. On this colored layer, the fine particle-containing thin film layer 10a, the clear thin film layer 20a, and the fine particle-containing thin film layer 10b were formed in the same manner as in Example 4 to obtain the thin film structure shown in FIG.

〔比較例１：図２（ｅ）参照〕
本木目を有する基材（２）上に着色層の樹脂材料のみをスプレー塗装した層３１を形成し、その上に薄膜層１１ａとして、屈折率１．４５のバインダー樹脂（１）に対して、微粒子は添加せず、上記赤顔料を樹脂固形分比率濃度が０．８％になるよう添加した塗料を乾燥膜厚が１０μｍとなるように塗装したのち、クリヤ塗料（１）を用いて乾燥膜厚が３０μｍとなるようにクリヤ薄膜層２０ａを形成した。さらに薄膜層１１ｂとして薄膜層１１ａで使用した塗料を用いて同様の操作を繰り返し、図２（ｅ）に示す薄膜構造を得た。 [Comparative Example 1: see FIG. 2 (e)]
On the base material (2) having the main grain, the layer 31 is formed by spray-coating only the resin material of the colored layer, and the thin film layer 11a is formed thereon on the binder resin (1) having a refractive index of 1.45, Fine particles are not added, and after coating the red pigment added so that the resin solid content ratio concentration is 0.8% so that the dry film thickness is 10 μm, the clear film (1) is used to dry the film. The clear thin film layer 20a was formed so as to have a thickness of 30 μm. Furthermore, the same operation was repeated using the coating material used in the thin film layer 11a as the thin film layer 11b, and the thin film structure shown in FIG. 2 (e) was obtained.

〔比較例２：図２（ｃ）参照〕
上記着色層用材料に対して、上記赤顔料を樹脂固形分比率濃度が０．５％となるように添加して調製した塗料を用いて本木目を有する基材（２）上にスプレー塗装を実施して着色層３０ａとした。この着色層上に、微粒子含有薄膜層１０ａとして、屈折率１．４５のバインダー樹脂（１）に対して、最大粒子径１０μｍ、屈折率１．４５の微粒子（１）を樹脂固形分比率濃度が１％となるよう添加した塗料を乾燥膜厚が１０μｍとなるようにスプレー塗装したのち、クリヤ塗料（２）を用いて乾燥膜厚が４０μｍとなるようにクリヤ薄膜層２０ａを形成し、図２（ｃ）に示す薄膜構造を得た。 [Comparative example 2: see FIG. 2 (c)]
Spray coating is performed on the base material (2) having a main grain using a paint prepared by adding the red pigment to the colored layer material so that the resin solid content ratio concentration is 0.5%. The colored layer 30a was implemented. On this colored layer, as a fine particle-containing thin film layer 10a, a fine particle (1) having a maximum particle diameter of 10 μm and a refractive index of 1.45 is added to the binder resin (1) having a refractive index of 1.45. After the paint added so as to be 1% is spray-coated so that the dry film thickness is 10 μm, the clear thin film layer 20a is formed using the clear paint (2) so that the dry film thickness is 40 μm. The thin film structure shown in (c) was obtained.

上記各実施例及び比較例によって得られた塗膜の質感について、下記の要領によって目視評価した。その結果を表１に示す。
◎：非常に深み感を感じる
○：深み感を感じる
△：ほとんど深み感を感じない
×：全く深み感を感じない
なお、表１において、塗膜全体の透過率（全光線透過率）は、ＪＩＳ Ｋ ７１０５ ５．５に基づいて測定した。 About the texture of the coating film obtained by each said Example and comparative example, it evaluated visually by the following procedure. The results are shown in Table 1.
◎: Feeling a very deep feeling ○: Feeling a feeling of depth △: Feeling a little feeling of depth ×: Not feeling a feeling of depth at all In Table 1, the transmittance of the whole coating film (total light transmittance) is Measured based on JIS K 7105 5.5.

Figure 2010036138
Figure 2010036138

本発明の薄膜構造の様々な実施形態を示す断面図である。FIG. 3 is a cross-sectional view illustrating various embodiments of the thin film structure of the present invention. 実施例及び比較例の薄膜構造の断面図である。It is sectional drawing of the thin film structure of an Example and a comparative example.

符号の説明Explanation of symbols

Ｂ 基材
Ｐ 微粒子
Ｒ バインダー樹脂
１０ 微粒子含有薄膜層
１０ａ 第１の微粒子含有薄膜層
１０ｂ 第２の微粒子含有薄膜層
１０ｃ 第３の微粒子含有薄膜層
１１ａ、１１ｂ 微粒子を含まない薄膜層
２０、２０ａ クリヤ薄膜層
３０、３０ａ 着色層
３１ａ 着色層の樹脂材料のみをスプレー塗装した層 B Substrate P Fine particle R Binder resin 10 Fine particle-containing thin film layer 10a First fine particle-containing thin film layer 10b Second fine particle-containing thin film layer 10c Third fine particle-containing thin film layers 11a and 11b Thin film layer 20 and 20a not containing fine particles Thin film layer 30, 30a Colored layer 31a A layer in which only the resin material of the colored layer is spray-coated

Claims (9)

複数の薄膜層を有し、基材上に形成された薄膜構造であって、
上記薄膜層として、少なくとも１層の微粒子含有薄膜層と、少なくとも１層のクリヤ薄膜層を備え、
上記微粒子含有薄膜層が、微粒子とバインダー樹脂を含み
上記微粒子と上記バインダー樹脂とは視覚的に同化し、且つ、屈折率の差が０．００５以上である
ことを特徴とする薄膜構造。 A thin film structure having a plurality of thin film layers formed on a substrate,
The thin film layer includes at least one fine particle-containing thin film layer and at least one clear thin film layer,
The thin film structure, wherein the fine particle-containing thin film layer includes fine particles and a binder resin, the fine particles and the binder resin are visually assimilated, and a difference in refractive index is 0.005 or more. 少なくとも１層の上記微粒子含有薄膜層が、着色材を含有することを特徴とする請求項１に記載の薄膜構造。   The thin film structure according to claim 1, wherein at least one of the fine particle-containing thin film layers contains a colorant. 少なくとも１層の上記クリヤ薄膜層が、着色材を含有することを特徴とする請求項１又は２に記載の薄膜構造。 The thin film structure according to claim 1 or 2, wherein at least one of the clear thin film layers contains a coloring material. 上記着色材を含有する上記薄膜層を２層以上備えた上記薄膜構造であって、
これらの薄膜層のうち少なくとも２層の間で、上記着色材の濃度が異なることを特徴とする請求項２又は３に記載の薄膜構造。 The thin film structure including two or more thin film layers containing the colorant,
The thin film structure according to claim 2 or 3, wherein the concentration of the coloring material is different between at least two of the thin film layers. 上記薄膜層のうち少なくとも２層の間で、屈折率が異なることを特徴とする請求項１〜４のいずれか１つの項に記載の薄膜構造。 The thin film structure according to any one of claims 1 to 4, wherein a refractive index is different between at least two of the thin film layers. 上記微粒子含有薄膜層を２層以上備えた上記薄膜構造であって、
これらの微粒子含有薄膜層のうち少なくとも２層の間で、屈折率及び含有される上記バインダー樹脂の屈折率が異なることを特徴とする請求項５に記載の薄膜構造。 The thin film structure having two or more fine particle-containing thin film layers,
The thin film structure according to claim 5, wherein a refractive index and a refractive index of the binder resin contained are different between at least two of the fine particle-containing thin film layers. 更に、上記基材との接触面に着色層を有する上記薄膜構造であって、該着色層は上記基材の表面への刷り込みにより形成されたことを特徴とする請求項１〜６のいずれか１つの項に記載の薄膜構造。 Furthermore, it is the said thin film structure which has a colored layer in the contact surface with the said base material, Comprising: This colored layer was formed by imprinting on the surface of the said base material, The any one of Claims 1-6 characterized by the above-mentioned. The thin film structure according to any one of the items. 全光線透過率が５％以上であることを特徴とする請求項１〜７のいずれか１つの項に記載の薄膜構造。 The thin film structure according to any one of claims 1 to 7, wherein the total light transmittance is 5% or more. 自動車用部品の表面に形成されていることを特徴とする請求項１〜８のいずれか１つの項に記載の薄膜構造。   The thin film structure according to claim 1, wherein the thin film structure is formed on a surface of an automotive part.
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