JP2017186598A - Ornament and method for manufacturing the same - Google Patents
Ornament and method for manufacturing the same Download PDFInfo
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- JP2017186598A JP2017186598A JP2016075233A JP2016075233A JP2017186598A JP 2017186598 A JP2017186598 A JP 2017186598A JP 2016075233 A JP2016075233 A JP 2016075233A JP 2016075233 A JP2016075233 A JP 2016075233A JP 2017186598 A JP2017186598 A JP 2017186598A
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Abstract
Description
本発明は、装飾品及びその製造方法に関する。 The present invention relates to a decorative article and a manufacturing method thereof.
チタンの比重は４．５４ｇ／ｃｍ３であり、金の１９．３２ｇ／ｃｍ３、銀の１０．５０ｇ／ｃｍ３、銅の８．９６ｇ／ｃｍ３、白金の２１．４５ｇ／ｃｍ３、鉄の７．８７ｇ／ｃｍ３等、他の金属に比較して小さく軽量であるので、装飾品の材料として有利である。一方、チタンは、鉄、ステンレス等の金属に比較して柔らかく、装飾品として用いた場合、表面が傷つきやすいという問題がある。 The specific gravity of titanium is 4.54g / cm 3, gold of 19.32g / cm 3, silver 10.50g / cm 3, copper of 8.96g / cm 3, platinum of 21.45g / cm 3, iron 7.87 g / cm 3 , which is smaller and lighter than other metals, is advantageous as a decorative material. On the other hand, titanium is softer than metals such as iron and stainless steel, and has a problem that the surface is easily damaged when used as a decoration.
前記問題を解決するために、例えば、チタンの表面にＮｉ−Ｐめっき層と、硬質クロムめっき層とをこの順に備え、表面を硬質化して傷付きにくくしたチタン材料が知られている（例えば、特許文献１）。 In order to solve the above-mentioned problem, for example, a titanium material having a Ni-P plating layer and a hard chrome plating layer in this order on the surface of titanium and hardening the surface to prevent damage is known (for example, Patent Document 1).
前記チタン材料は、その表面にイオンプレーティングを施して、各種の色調を備える金属光沢を付与することにより、装飾品として使用することが考えられる。 It can be considered that the titanium material is used as a decorative product by ion plating on the surface thereof to give a metallic luster having various color tones.
しかしながら、チタンの表面にＮｉ−Ｐめっき層と、硬質クロムめっき層とをこの順に備え表面を硬質化したチタン材料の表面にイオンプレーティングを施した装飾品は、人間の皮膚に触れたときに色調によってはアレルギーを起こすという不都合がある。 However, a decorative article having a Ni-P plating layer and a hard chrome plating layer in this order on the surface of titanium and ion-plating the surface of the titanium material hardened is in contact with the human skin. Depending on the color, there is an inconvenience of causing allergies.
本発明は、かかる不都合を解消して、イオンプレーティングにより付与される色調によらず、人間の皮膚に触れたときにアレルギーを起こすことのない装飾品及びその製造方法を提供することを目的とする。 An object of the present invention is to eliminate such inconveniences and to provide a decorative article that does not cause allergies when touching human skin regardless of the color tone imparted by ion plating, and a method for producing the same. To do.
本発明者らは、チタンの表面にＮｉ−Ｐめっき層と、硬質クロムめっき層とをこの順に備え表面を硬質化したチタン材料の表面にイオンプレーティングを施した装飾品が人間の皮膚に触れたときにアレルギーを起こす原因について鋭意検討を行った。 The inventors of the present invention have touched human skin with a decorative article in which a Ni-P plating layer and a hard chrome plating layer are provided in this order on a titanium surface and the surface of a titanium material having a hardened surface is subjected to ion plating. We studied earnestly about the cause of allergies.
この結果、前記硬質クロムめっき層は強く収縮する傾向があり、その表面に目視では確認できない程度の微細な亀裂を備えており、人間の皮膚に触れたときに汗等の塩分を含む体液がこの亀裂から内部に侵入し、下地のＮｉ−Ｐめっき層と反応することを知見した。前記アレルギーは、前記塩分を含む体液と前記Ｎｉ−Ｐめっき層との反応により生成した物質がさらにイオンプレーティングにより形成された層と反応し、イオンプレーティングにより形成された層を変色させたり腐食させたために起こるものと考えられる。 As a result, the hard chrome plating layer has a tendency to strongly contract, and the surface thereof has fine cracks that cannot be visually confirmed, and body fluids containing salt such as sweat when touching human skin It was found that it penetrated into the inside from the crack and reacted with the underlying Ni-P plating layer. The allergy is caused by the reaction between the body fluid containing the salt and the Ni-P plating layer reacts with the layer formed by ion plating, and discolors or corrodes the layer formed by ion plating. It is thought that this happens because
本発明者らは、前記知見に基づいてさらに検討を重ね、Ｎｉ−Ｐめっきに代えてパラジウムめっきを用いることにより、前記塩分を含む体液との反応を防止でき、イオンプレーティングにより形成された層の変色や腐食を無くすことができることを見出し、本発明に到達した。 The present inventors have further studied based on the above knowledge, and by using palladium plating instead of Ni-P plating, the reaction with the bodily fluid containing salt can be prevented, and the layer formed by ion plating The present inventors have found that the discoloration and corrosion can be eliminated, and the present invention has been achieved.
そこで、本発明の装飾品は、チタンからなる基材と、該基材上に形成されたパラジウムめっき層と、該パラジウムめっき層上に形成された硬質クロムめっき層と、該硬質クロムめっき層上に形成された金属光沢を有する被覆層とを備えることを特徴とする。 Therefore, the decorative article of the present invention includes a base material made of titanium, a palladium plating layer formed on the base material, a hard chromium plating layer formed on the palladium plating layer, and the hard chromium plating layer. And a coating layer having a metallic luster formed thereon.
前記本発明の装飾品は、チタンからなる基材の表面にパラジウムめっきを施してパラジウムめっき層を形成する工程と、該該パラジウムめっき層上に硬質クロムめっきを施して硬質クロムめっき層を形成する工程と、該硬質クロムめっき層上にイオンプレーティングを施して金属光沢を有する被覆層を形成する工程とを備える製造方法により製造することができる。 In the decorative product of the present invention, a surface of a base material made of titanium is subjected to palladium plating to form a palladium plating layer, and a hard chromium plating layer is formed on the palladium plating layer by forming a hard chromium plating layer. It can be produced by a production method comprising a step and a step of forming a coating layer having a metallic luster by performing ion plating on the hard chromium plating layer.
前記硬質クロムめっき層は、その強く収縮する傾向により表面に目視では確認できない程度の微細な亀裂を備えており、人間の皮膚に触れたときに汗等の塩分を含む体液がこの亀裂から内部に侵入する。しかし、本発明の装飾品によれば、チタンの表面に前記パラジウムめっき層を備え、その上に前記硬質クロムめっき層を備えているので、前記亀裂から内部に侵入した前記塩分を含む体液は該パラジウムめっき層と接触することとなる。 The hard chromium plating layer has fine cracks that cannot be visually confirmed on the surface due to its strong contraction, and body fluids containing salt such as sweat are exposed to the inside from the cracks when touching human skin. invade. However, according to the decorative article of the present invention, since the palladium plating layer is provided on the surface of titanium and the hard chromium plating layer is provided thereon, the bodily fluid containing the salt entering the inside from the crack is the It will be in contact with the palladium plating layer.
このとき、前記パラジウムめっき層は前記塩分を含む体液と反応することがないので、前記イオンプレーティングにより形成された金属光沢を有する被覆層の変色や腐食を無くしてアレルギーの発生を防止することができる。 At this time, since the palladium plating layer does not react with the body fluid containing the salt, it is possible to prevent the occurrence of allergy by eliminating discoloration and corrosion of the coating layer having a metallic luster formed by the ion plating. it can.
また、前記パラジウムめっき層は、前記硬質クロムめっき層に比較して柔軟であり、該硬質クロムめっき層の密着性を向上させることができる。 Further, the palladium plating layer is more flexible than the hard chrome plating layer, and the adhesion of the hard chrome plating layer can be improved.
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
図１に示すように、本実施形態の装飾品１は、チタンからなる基材２（以下、チタン基材２と略記する）の上に形成されたパラジウムめっき層３と、パラジウムめっき層３上に形成された硬質クロムめっき層４と、硬質クロムめっき層４上にイオンプレーティングにより形成された金属光沢を有する被覆層５を備えている。装飾品１は被覆層５により種々の色調の金属光沢を備えるものとすることができ、しかも軽量で、表面が硬く傷つきにくいので、バングル、ブレスレットやアンクレットのビーズ（飾り玉）、バックル等に好適に用いることができる。 As shown in FIG. 1, the decorative article 1 of the present embodiment includes a palladium plating layer 3 formed on a base material 2 made of titanium (hereinafter abbreviated as a titanium base material 2), and a palladium plating layer 3. And a coating layer 5 having a metallic luster formed on the hard chromium plating layer 4 by ion plating. The decorative article 1 can be provided with metallic luster of various colors by the coating layer 5 and is light and has a hard and hard surface, so it is suitable for bangle, bracelet, anklet bead (decoration ball), buckle, etc. Can be used.
本実施形態の装飾品１は、次のようにして製造することができる。 The decorative article 1 of this embodiment can be manufactured as follows.
まず、図２のＳＴＥＰ１で、チタン基材２からなる素材を加工し、バングル、ブレスレットやアンクレットのビーズ（飾り玉）、バックル等の所定の形状にする。 First, in STEP 1 of FIG. 2, the material made of the titanium base material 2 is processed into a predetermined shape such as a bangle, a bracelet, an anklet bead (decorative ball), a buckle or the like.
次に、図２のＳＴＥＰ２で、所定の形状に加工されたチタン基材２上にパラジウムめっきを施す。前記パラジウムめっきは、市販のめっき浴を用い、それ自体公知の方法により行うことができる。この結果、チタン基材２上にパラジウムめっき層３が形成される。 Next, in STEP 2 of FIG. 2, palladium plating is performed on the titanium base material 2 processed into a predetermined shape. The palladium plating can be performed by a method known per se using a commercially available plating bath. As a result, the palladium plating layer 3 is formed on the titanium substrate 2.
次に、図２のＳＴＥＰ３で、パラジウムめっき層３上に硬質クロムめっきを施す。前記硬質クロムめっきは、例えば、無水クロム酸１００〜４００ｇ／リットル、硫酸１〜４ｇ／リットルを含むめっき浴にパラジウムめっき層３が形成されたチタン基材２を浸漬し、３Ｖの電圧を４分間印加することにより施すことができる。この結果、パラジウムめっき層３上に、膜厚１μｍ程度の硬質クロムめっき層４を形成することができる。 Next, hard chromium plating is performed on the palladium plating layer 3 in STEP3 of FIG. The hard chromium plating is performed by, for example, immersing the titanium substrate 2 on which the palladium plating layer 3 is formed in a plating bath containing 100 to 400 g / liter of chromic anhydride and 1 to 4 g / liter of sulfuric acid, and applying a voltage of 3 V for 4 minutes. It can apply by applying. As a result, a hard chromium plating layer 4 having a thickness of about 1 μm can be formed on the palladium plating layer 3.
次に、図２のＳＴＥＰ４で、硬質クロムめっき層４が形成されたチタン基材２に対し、イオンプレーティングを施す。前記イオンプレーティングは、例えば、ＴｉＯ、ＴｉＣ、ＴｉＣＮ、ＴｉＮ等の金属化合物をターゲットとしてそれ自体公知の方法により行うことができる。この結果、装飾品１として、硬質クロムめっき層４上に種々の色調の金属光沢を有する被覆層５を形成することができる。 Next, in STEP 4 of FIG. 2, ion plating is performed on the titanium base material 2 on which the hard chromium plating layer 4 is formed. The ion plating can be performed by a method known per se using, for example, a metal compound such as TiO, TiC, TiCN, or TiN as a target. As a result, it is possible to form the coating layer 5 having metallic luster of various colors on the hard chrome plating layer 4 as the decorative article 1.
次に、イオンプレーティングのターゲット及び雰囲気を変えて、種々の色調の金属光沢を有する被覆層５を備える装飾品１（サンプル１〜１１）を製造し、得られた装飾品１に対して塩水噴霧試験を行った。前記塩水噴霧試験は、装飾品１が人間の皮膚から分泌される汗等の塩分を含む体液に接触した状況を想定した加速劣化試験である。前記塩水噴霧試験は、ＪＩＳ Ｚ ２３７１に基づき、装飾品１に、５０±５ｇ／リットルの濃度の食塩水（ｐＨ６．５〜７．２）を３５±２℃の温度下、１．５±０．５ミリリットル／ｃｍ２／時間の噴霧量で４８時間噴霧することにより行った。 Next, the decorative article 1 (samples 1 to 11) including the coating layer 5 having a metallic luster of various colors is manufactured by changing the ion plating target and atmosphere, and salt water is applied to the obtained decorative article 1. A spray test was performed. The salt spray test is an accelerated deterioration test assuming a situation in which the decorative article 1 is in contact with a body fluid containing salt such as sweat secreted from human skin. The salt spray test is based on JIS Z 2371, and the decorative article 1 is supplied with saline (pH 6.5 to 7.2) having a concentration of 50 ± 5 g / liter at a temperature of 35 ± 2 ° C. and 1.5 ± 0. It was carried out by spraying for 48 hours at a spray rate of 5 ml / cm 2 / hour.
次に、比較のために、パラジウムめっき層３に代えて硬質ニッケルめっき層を備えることを除いて、本実施形態の装飾品１と全く同一の構成を備える装飾品（サンプル１２〜１４）を製造し、得られた装飾品に対して装飾品１と全く同一にして塩水噴霧試験を行った。結果を表１に示す。 Next, for comparison, a decorative article (samples 12 to 14) having the same configuration as the decorative article 1 of the present embodiment is manufactured except that a hard nickel plating layer is provided instead of the palladium plating layer 3. Then, the salt spray test was performed on the obtained decorative article in exactly the same manner as the decorative article 1. The results are shown in Table 1.
表１から、チタン基材２上にパラジウムめっき層３、硬質クロムめっき層４、イオンプレーティングにより形成された金属光沢を有する被覆層５を備える本実施形態の装飾品１（サンプル１〜１１）によれば、前記塩水噴霧試験によっても変色が無いことが明らかである。一方、比較例として、本実施形態の装飾品１におけるパラジウムめっき層３に代えて硬質ニッケルめっき層を備える装飾品（サンプル１２〜１４）では、前記塩水噴霧試験によって変色することが明らかである。 From Table 1, the decorative article 1 (samples 1 to 11) of the present embodiment including the palladium plating layer 3, the hard chromium plating layer 4, and the coating layer 5 having a metallic luster formed by ion plating on the titanium substrate 2 According to the above, it is clear that there is no discoloration even by the salt spray test. On the other hand, as a comparative example, it is clear that in the decorative articles (samples 12 to 14) having a hard nickel plating layer instead of the palladium plating layer 3 in the decorative article 1 of the present embodiment, the color is changed by the salt spray test.
従って、本実施形態の装飾品１によれば、人間の皮膚から分泌される汗等の塩分を含む体液に接触したときにも変色等がなく、アレルギーを起こさないことが期待される。 Therefore, according to the decorative article 1 of the present embodiment, it is expected that there is no discoloration or the like even when it comes in contact with a body fluid containing salt such as sweat secreted from human skin and does not cause allergies.
１…装飾品、 ２…チタン基材、 ３…パラジウムめっき層、 ４…硬質クロムめっき層、 ５…被覆層。 DESCRIPTION OF SYMBOLS 1 ... Ornament, 2 ... Titanium base material, 3 ... Palladium plating layer, 4 ... Hard chromium plating layer, 5 ... Covering layer.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142032A (en) * | 1974-10-09 | 1976-04-09 | Mitsubishi Heavy Ind Ltd | KOSHITSUKUROMUJOCHAKUHO |
| JPS61596A (en) * | 1985-05-23 | 1986-01-06 | Canon Inc | Formation of chromium plated film having metallic luster |
| JP2001234392A (en) * | 2000-02-28 | 2001-08-31 | Seiko Corp | Decorative member |
| JP2003239083A (en) * | 2001-12-13 | 2003-08-27 | Seiko Epson Corp | Surface treatment method for ornament, ornament and watch |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142032A (en) * | 1974-10-09 | 1976-04-09 | Mitsubishi Heavy Ind Ltd | KOSHITSUKUROMUJOCHAKUHO |
| JPS61596A (en) * | 1985-05-23 | 1986-01-06 | Canon Inc | Formation of chromium plated film having metallic luster |
| JP2001234392A (en) * | 2000-02-28 | 2001-08-31 | Seiko Corp | Decorative member |
| JP2003239083A (en) * | 2001-12-13 | 2003-08-27 | Seiko Epson Corp | Surface treatment method for ornament, ornament and watch |
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