JP6087259B2 - Surface-treated stainless steel and kitchen top plate - Google Patents

Surface-treated stainless steel and kitchen top plate Download PDF

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JP6087259B2
JP6087259B2 JP2013226463A JP2013226463A JP6087259B2 JP 6087259 B2 JP6087259 B2 JP 6087259B2 JP 2013226463 A JP2013226463 A JP 2013226463A JP 2013226463 A JP2013226463 A JP 2013226463A JP 6087259 B2 JP6087259 B2 JP 6087259B2
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深津 昌宏
昌宏 深津
明彦 小形
明彦 小形
風希 中野
風希 中野
小幡 一敏
一敏 小幡
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Cleanup Corp
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本発明は、高い透明度と優れた親水性を有しながら細かい擦り傷の発生を防止することのできる表面処理ステンレス材及びこれを用いたキッチン天板に関するものである。   The present invention relates to a surface-treated stainless steel material that can prevent generation of fine scratches while having high transparency and excellent hydrophilicity, and a kitchen top plate using the same.

従来、水周り、特にキッチンに用いられるステンレス材は、水滴が付着し汚れ易いため、こうしたステンレス材に汚れが付着しにくくする、または取り除き易くする技術が求められていた。   Conventionally, stainless steel materials used around water, particularly in kitchens, are susceptible to contamination due to water droplets, and thus a technique for making such stainless materials less likely to adhere to dirt or easy to remove has been demanded.

こうした技術の一例として、特許文献1には、ステンレス材に対してケイ酸を含むコーティング剤を用いて表面処理を行い、Si、Li及びNaを含む溶液を塗布した後、これを焼成することで良好な外観と親水性とを備えた表面処理ステンレス材を得る技術が開示されている。こうして生成された表面処理ステンレス材は、キッチンにおいては特にシンク用に用いられる。   As an example of such a technique, Patent Document 1 discloses that a stainless steel material is subjected to a surface treatment using a coating agent containing silicic acid, a solution containing Si, Li and Na is applied and then fired. A technique for obtaining a surface-treated stainless steel material having a good appearance and hydrophilicity is disclosed. The surface-treated stainless steel material thus produced is used particularly for a sink in a kitchen.

国際公開第2006/092941号International Publication No. 2006/092941

ところで、上述した表面処理ステンレス材をキッチン天板として使用する場合、調理の作業の過程で水や調味料等が付着し、それをふきん等で拭き取る作業が発生する。また、それらが付着した箇所によっては汚れとして固着するため、ふきんや、ステンレスのたわし等を用いて擦って除去する作業も発生し得る。このような作業の繰り返しにより、キッチン天板の表面に多くの細かな擦り傷が発生してしまう。   By the way, when using the above-mentioned surface-treated stainless steel as a kitchen top plate, water, seasonings, and the like are attached in the course of cooking, and the work of wiping it off with a cloth or the like occurs. Moreover, since it adheres as dirt depending on the part to which they adhered, the operation | work removed by rubbing using a wipe, a stainless steel scrub, etc. may also generate | occur | produce. By repeating such work, many fine scratches are generated on the surface of the kitchen top plate.

またキッチン天板はキッチンの使用者の目にとまりやすい場所であるため、こうして発生した擦り傷は目立ち、キッチン天板の外観を損なう原因となっていた。   Moreover, since the kitchen top plate is a place that is easily caught by the user of the kitchen, the scratches thus generated are conspicuous and cause the appearance of the kitchen top plate to be damaged.

一方シンクの中においては、水や調味料が付着しても流水によって洗い流すことができ、また常に水が流れる場所であるため、そもそも汚れの固着といった現象があまり発生し得ない。細かな擦り傷に耐えうる性能はキッチン天板にこそ必要である。   On the other hand, in the sink, even if water or seasoning adheres, it can be washed away with running water, and since it is a place where water always flows, a phenomenon such as sticking of dirt hardly occurs in the first place. The ability to withstand fine scratches is essential for kitchen tops.

また、こうした擦り傷の発生を防止するため各種コーティングを用いることが考えられるが、この場合コーティングに透明感が無いとステンレス材の意匠性を損なうことになるため、透明度の高いコーティングを採用する必要がある。   In order to prevent the occurrence of such scratches, it is conceivable to use various coatings. In this case, if the coating is not transparent, the design properties of the stainless steel will be impaired. Therefore, it is necessary to use a coating with high transparency. is there.

そこで、本発明は、上述した問題点に鑑みて案出されたものであり、高い硬度と透明度とを有するコーティング層を備えることで、キッチン天板に用いた場合でも良好な外観を維持しつつ擦り傷の発生を効果的に防止することのできる表面処理ステンレス材及びこれを用いたキッチン天板を提供することを目的とする。   Therefore, the present invention has been devised in view of the above-described problems, and is provided with a coating layer having high hardness and transparency, while maintaining a good appearance even when used for a kitchen top plate. It is an object of the present invention to provide a surface-treated stainless steel material that can effectively prevent the generation of scratches and a kitchen top plate using the same.

本発明者は、上述した課題を解決するために、高い硬度と透明度とを有するコーティング層を備えることで、キッチン天板に用いた場合でも良好な外観を維持しつつ擦り傷の発生を効果的に防止することのできる表面処理ステンレス材及びこれを用いたキッチン天板を発明した。   In order to solve the above-mentioned problems, the present inventor is provided with a coating layer having high hardness and transparency, so that it is possible to effectively generate scratches while maintaining a good appearance even when used for a kitchen top plate. Invented a surface-treated stainless steel that can be prevented and a kitchen top plate using the same.

第1発明に係る表面処理ステンレス材は、ステンレス層の表面にコーティング層が形成された表面処理ステンレス材であって、前記コーティング層は、前記ステンレス層の表面に形成されたSiとZrとを含む第1層と、前記第1層の表面に形成された、SiをSiO2換算で1〜20質量部の割合で含む水溶液を塗布することにより、表面にOH基を生成するための第2層と、により構成され、第1層及び第2層におけるSiO 2 /ZrO 2 が8.49以上12.89以下であり、膜厚が0.68μm以上1.10μm以下であることを特徴とする。 The surface-treated stainless steel material according to the first invention is a surface-treated stainless steel material having a coating layer formed on the surface of the stainless steel layer, and the coating layer includes Si and Zr formed on the surface of the stainless steel layer. A first layer and a second layer for generating OH groups on the surface by applying an aqueous solution formed on the surface of the first layer and containing Si in an amount of 1 to 20 parts by mass in terms of SiO 2 The SiO 2 / ZrO 2 in the first layer and the second layer is 8.49 to 12.89, and the film thickness is 0.68 μm to 1.10 μm.

第2発明に係る表面処理ステンレス材は、第1発明に係る表面処理ステンレス材において、前記第2層はさらにLi及びNaを含むことを特徴とする。 The surface-treated stainless steel material according to the second invention is the surface-treated stainless steel material according to the first invention, wherein the second layer further contains Li and Na .

上述した構成からなる本発明によれば、高い硬度と透明度とを有するコーティング層を備えた表面処理ステンレス材とすることで、キッチン天板に用いた場合でも良好な外観を維持しつつ擦り傷の発生を効果的に防止することが可能となる。   According to the present invention having the above-described configuration, by using a surface-treated stainless steel material having a coating layer having high hardness and transparency, generation of scratches while maintaining a good appearance even when used for a kitchen top plate. Can be effectively prevented.

本発明の実施形態に係る表面処理ステンレス材を示す断面図である。It is sectional drawing which shows the surface treatment stainless steel material which concerns on embodiment of this invention. 図1の表面処理ステンレス材の化学構成を示す模式図である。It is a schematic diagram which shows the chemical structure of the surface treatment stainless steel material of FIG.

以下、本発明の実施の形態としての表面処理ステンレス材について詳細に説明する。図1は、本発明の実施形態に係る表面処理ステンレス材1を示す断面図である。図2は、図1の表面処理ステンレス材の化学構成を示す模式図である。   Hereinafter, the surface-treated stainless steel material as an embodiment of the present invention will be described in detail. FIG. 1 is a cross-sectional view showing a surface-treated stainless steel material 1 according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a chemical structure of the surface-treated stainless steel material in FIG.

本実施形態に係る表面処理ステンレス材1は、ステンレス層2と、ステンレス層2の表面に形成されたコーティング層としてステンレス層2の表面に直接形成された第1層3及び第1層3の表面に形成された第2層4とにより構成されている。   The surface-treated stainless steel material 1 according to this embodiment includes a stainless steel layer 2 and the surfaces of the first layer 3 and the first layer 3 directly formed on the surface of the stainless steel layer 2 as a coating layer formed on the surface of the stainless steel layer 2. And the second layer 4 formed on the substrate.

ステンレス層2は、SUS304等のステンレス製の板状の部材で構成されている。このステンレス層2として、本実施形態に係る表面処理ステンレス材1では表面に何ら処理を施していないステンレス層2が想定されている。しかし、本発明はこれに限らず、エンボス加工や、冷間圧延後に砥粒の研磨ベルトによる研磨等を行ったステンレス層2を用いてもよい。   The stainless steel layer 2 is made of a plate-like member made of stainless steel such as SUS304. As the stainless steel layer 2, the stainless steel layer 2 whose surface is not subjected to any treatment is assumed in the surface-treated stainless steel material 1 according to the present embodiment. However, the present invention is not limited to this, and a stainless steel layer 2 that has been embossed or polished with a polishing belt of abrasive grains after cold rolling may be used.

ステンレス層2の表面にエンボス加工等を施すことにより、コーティング層により生じる虹色の光沢を目立たなくし、ステンレス素材の質感を強調することができる。   By embossing or the like on the surface of the stainless steel layer 2, the iridescent luster produced by the coating layer can be made inconspicuous and the texture of the stainless steel material can be emphasized.

第1層3は、ZrとSiとが混合された溶液を塗布することで形成されている。この第1層3は、ステンレス層2と第2層4とを結びつける作用を奏する。   The first layer 3 is formed by applying a solution in which Zr and Si are mixed. The first layer 3 has an effect of connecting the stainless steel layer 2 and the second layer 4 together.

第2層4は、SiをSiO2換算で1〜20質量部含むとともに、LiおよびNaを含むアルカリ水溶液を塗布して形成される、表面に−SiO2基を有する親水性の皮膜である。 The second layer 4 is a hydrophilic film containing 1 to 20 parts by mass of Si in terms of SiO 2 and having a —SiO 2 group on the surface formed by applying an alkaline aqueous solution containing Li and Na.

こうした水溶液として、オルトケイ酸及びその縮合酸並びに二酸化ケイ素(SiO2)及びその水和物のいずれかを含む。また、副成分としてZrO2、TiO2、Al23、B23、CaO、ZnO、MgO、Na2O、K2O等の無機成分を含有している。また、無機バインダーとして公知であるコロイダルシリカやケイ酸エチルを含有していてもよい。 Such an aqueous solution contains any of orthosilicic acid and its condensed acid, and silicon dioxide (SiO 2 ) and its hydrate. Further, ZrO 2, TiO 2, Al 2 O 3 as an auxiliary component, B 2 O 3, CaO, ZnO, MgO, containing the Na 2 O, K 2 inorganic components O and the like. Moreover, you may contain colloidal silica and ethyl silicate which are well-known as an inorganic binder.

上記アルカリ水溶液は、上述したようにSiをSiO2換算で1〜20質量部含んでいる。これにより、第2層4の表面にOH基が生成され、親水性を呈する。この親水性は、接触角が20°以下となる程度の親水性であることが望ましい。なお、SiがSiO2換算で20質量部を超えるとざらざらとした外観の表面となりやすく、1部未満であると親水性被膜が消失しやすくなる。 As described above, the alkaline aqueous solution contains 1 to 20 parts by mass of Si in terms of SiO 2 . Thereby, an OH group is generated on the surface of the second layer 4 and exhibits hydrophilicity. The hydrophilicity is desirably hydrophilic so that the contact angle is 20 ° or less. In addition, when Si exceeds 20 parts by mass in terms of SiO 2 , a rough surface tends to be formed, and when it is less than 1 part, the hydrophilic coating film is likely to disappear.

次に、上述した構成を有する表面処理ステンレス材1の製造方法について説明する。   Next, the manufacturing method of the surface treatment stainless steel material 1 which has the structure mentioned above is demonstrated.

まず、ステンレス層2について、表面の脱脂処理等が行われる。   First, the surface of the stainless steel layer 2 is subjected to a degreasing process or the like.

次に、第1層3として、ZrとSiとが混合された溶液の塗布が行われる。この塗布は、スプレー、刷毛塗り、ディッピング等により行われる。   Next, as the first layer 3, a solution in which Zr and Si are mixed is applied. This application is performed by spraying, brushing, dipping or the like.

次に、第1層3の塗布後、自然乾燥が行われ、更に200度以上の高温で20分以上加熱処理する第1加熱工程が行われる。   Next, after the application of the first layer 3, natural drying is performed, and further, a first heating process is performed in which heat treatment is performed at a high temperature of 200 ° C. or more for 20 minutes or more.

次に、第2層4として、SiをSiO2換算で1〜20質量部含むとともに、LiおよびNaを含む水溶液の塗布が行われる。この塗布も、スプレー、刷毛塗り、ディッピング等により行われる。   Next, as 2nd layer 4, while containing 1-20 mass parts of Si in conversion of SiO2, application | coating of the aqueous solution containing Li and Na is performed. This application is also performed by spraying, brushing, dipping or the like.

なお、Si(SiO2換算)、Na(NaO2換算)及びLi(Li2O換算)の各成分の測定は、いずれもJIS K 0400−52−30(水質−誘導結合プラズマ発光分光分析)に準拠して行われた。   In addition, each measurement of each component of Si (SiO2 conversion), Na (NaO2 conversion), and Li (Li2O conversion) is performed in accordance with JIS K 0400-52-30 (water quality-inductively coupled plasma emission spectroscopy). It was broken.

次に、第2層4の塗布後、自然乾燥が行われ、更に200度以上の高温で20分以上加熱処理する第2加熱工程が行われる。   Next, after the application of the second layer 4, natural drying is performed, and further a second heating step is performed in which heat treatment is performed at a high temperature of 200 ° C. or more for 20 minutes or more.

なお、第1層3及び第2層4の塗布において、各溶液の粒子径は、可視光に対して透明となることが重要である。つまり、可視光の波長より小さいナノ粒子による散乱はリレー散乱が主となり、可視光波長、すなわち380nm〜780nmの1/4以下の粒径の場合には高い透明性を得ることができる。   In the application of the first layer 3 and the second layer 4, it is important that the particle diameter of each solution is transparent to visible light. That is, the scattering by the nanoparticles smaller than the wavelength of visible light is mainly relay scattering, and high transparency can be obtained in the case of a visible light wavelength, that is, a particle diameter of 1/4 or less of 380 nm to 780 nm.

そのため、第1層3及び第2層4の塗布において、各溶液の粒子径は、可視光波長の1/4以下の粒径である、95nm以下となるように行われている。   Therefore, in the application of the first layer 3 and the second layer 4, the particle size of each solution is set to 95 nm or less, which is a particle size of 1/4 or less of the visible light wavelength.

こうして製造される表面処理ステンレス1の実施例について、以下に説明する。   Examples of the surface-treated stainless steel 1 manufactured in this way will be described below.

Figure 0006087259
Figure 0006087259

表1は、上述した製造方法により製造された表面処理ステンレス材1であって、第1層3と第2層4の塗布量を変化させることで膜厚(μm)、ZrO2量(mg/m2)及びSiO2量(mg/m2)を変化させた5つの試験体について、それぞれ傷付き性評価試験、表面の意匠性評価試験、表面の滑らかさ評価試験及び耐衝撃性評価試験を行った結果を示している。 Table 1 shows the surface-treated stainless steel material 1 manufactured by the above-described manufacturing method. By changing the coating amount of the first layer 3 and the second layer 4, the film thickness (μm), the ZrO 2 amount (mg / m2) and five specimens with varying amounts of SiO 2 (mg / m2) were subjected to a scratch resistance evaluation test, a surface design evaluation test, a surface smoothness evaluation test, and an impact resistance evaluation test, respectively. Results are shown.

膜厚(μm)は、コーティング層としての第1層3と第2層4を合わせた膜厚であり、加熱工程後のものを示している。この膜厚の測定は、走査型電子顕微鏡(SEM)を用いて行われた。   The film thickness (μm) is the total film thickness of the first layer 3 and the second layer 4 as the coating layer, and shows the thickness after the heating step. The film thickness was measured using a scanning electron microscope (SEM).

ZrO2量(mg/m2)及びSiO2量(mg/m2)の測定も、SEMを用いた元素分析により行われた。 Measurement of the amount of ZrO 2 (mg / m 2 ) and the amount of SiO 2 (mg / m 2 ) was also performed by elemental analysis using SEM.

傷付き性評価試験は、市販のステンレスたわしに3kgの荷重をかけて表面処理ステンレス材1の表面を100回、円状に擦った後目視確認することで行われた。   The scratch property evaluation test was performed by applying a load of 3 kg to a commercially available stainless steel scourer, rubbing the surface of the surface-treated stainless steel material 100 times in a circular shape, and visually checking the surface.

表面の意匠性評価試験は、目視確認により表面処理ステンレス材1の表面の異常を確認することで行われた。   The surface design evaluation test was performed by confirming the surface abnormality of the surface-treated stainless steel material 1 by visual confirmation.

表面の滑らかさ評価試験は、実験者が表面処理ステンレス材1の表面を手で触ることで行われた。   The surface smoothness evaluation test was performed by an experimenter touching the surface of the surface-treated stainless steel material 1 with a hand.

耐衝撃性評価試験は、1kgの重りを1mの高さから表面処理ステンレス材1に落下させることで行われた。   The impact resistance evaluation test was performed by dropping a 1 kg weight from a height of 1 m onto the surface-treated stainless steel material 1.

上記各試験を行った結果、傷付き性評価試験では試験体1について傷の発生が見受けられた。   As a result of the above tests, the test piece 1 was found to be scratched in the scratch property evaluation test.

また、表面の意匠性評価試験では、試験体5について、コーティング層の白濁が見受けられた。   Moreover, in the surface designability evaluation test, white turbidity of the coating layer was observed for the specimen 5.

また、表面の滑らかさ評価試験でも、試験体5について、表面にざらつきの発生が見受けられた。
また、耐衝撃性評価試験についても、試験体5について、コーティング層の割れの発生が見受けられた。
Further, in the surface smoothness evaluation test, the surface of the test specimen 5 was found to be rough.
In addition, in the impact resistance evaluation test, cracks in the coating layer were observed for the specimen 5.

以上の結果から、コーティング層の膜厚が0.68μm以上1.10μm以下の範囲にあれば、傷付き性評価試験、表面の意匠性評価試験、表面の滑らかさ評価試験及び耐衝撃性評価試験の全てにおいて良好な結果を得ることができることが判明した。   From the above results, if the thickness of the coating layer is in the range of 0.68 μm or more and 1.10 μm or less, the scratch resistance evaluation test, the surface design evaluation test, the surface smoothness evaluation test, and the impact resistance evaluation test It was found that good results can be obtained in all of the above.

また、この結果及び更なる試験の結果に基づき、上記膜厚のコーティング層に含まれるSiO2量(mg/m2)は、1000≦SiO2≦2000の範囲、好ましくは1071.3≦SiO2≦1357.0の範囲となる場合、上記各試験において良好な結果を得られることが判明した。 Based on this result and the results of further tests, the amount of SiO 2 (mg / m 2 ) contained in the coating layer having the above film thickness is in the range of 1000 ≦ SiO 2 ≦ 2000, preferably 1071.3 ≦ SiO 2 ≦ 1357. When it was in the range of 0, it was found that good results could be obtained in the above tests.

また、上述した試験体2〜4に係る表面処理ステンレス材1のコーティング層は、いずれも接触角が20°以下となっていた。   Moreover, the contact angle of the coating layer of the surface-treated stainless steel material 1 according to each of the test bodies 2 to 4 described above was 20 ° or less.

上述した実施形態に係る表面処理ステンレス材1によると、キッチン天板に用いた場合でも細かな擦り傷の発生を防止することのできる硬度と高い透明度を有するコーティング層を備えているため、擦り傷と虹色の発生を防止し、良好な外観を維持することが可能となる。   According to the surface-treated stainless steel material 1 according to the above-described embodiment, since it has a coating layer having hardness and high transparency that can prevent the occurrence of fine scratches even when used on a kitchen top plate, scratches and rainbows are provided. Generation of color can be prevented and a good appearance can be maintained.

なお、上述した表面処理ステンレス材1は、キッチン天板の他、洗面台や浴室の壁面等に対しても用いることができ、これらに用いた場合でも、同様の効果を奏することができる。   In addition, the surface-treated stainless steel material 1 described above can be used not only for a kitchen top plate but also for a washstand, a wall surface of a bathroom, and the like, and even when used for these, the same effect can be obtained.

1 表面処理ステンレス材
2 ステンレス層
3 第1層
4 第2層
DESCRIPTION OF SYMBOLS 1 Surface treatment stainless steel material 2 Stainless steel layer 3 1st layer 4 2nd layer

Claims (2)

ステンレス層の表面にコーティング層が形成された表面処理ステンレス材であって、前記コーティング層は、
前記ステンレス層の表面に形成されたSiとZrとを含む第1層と、
前記第1層の表面に形成された、SiをSiO2換算で1〜20質量部の割合で含む水溶液を塗布することにより、表面にOH基を生成するための第2層と、
により構成され、第1層及び第2層におけるSiO 2 /ZrO 2 が8.49以上12.89以下であり、膜厚が0.68μm以上1.10μm以下であることを特徴とする表面処理ステンレス材。
A surface-treated stainless steel material in which a coating layer is formed on the surface of the stainless steel layer,
A first layer containing Si and Zr formed on the surface of the stainless steel layer;
A second layer for generating OH groups on the surface by applying an aqueous solution formed on the surface of the first layer and containing Si in an amount of 1 to 20 parts by mass in terms of SiO 2 ;
Surface treated stainless steel characterized in that SiO 2 / ZrO 2 in the first layer and the second layer is 8.49 to 12.89 and the film thickness is 0.68 μm to 1.10 μm Wood.
前記第2層は、さらにLi及びNaを含むことを特徴とする請求項1に記載の表面処理ステンレス材。 The surface-treated stainless steel material according to claim 1, wherein the second layer further contains Li and Na .
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