JP2003145671A - Clearly coated stainless steel sheet with high transparency - Google Patents
Clearly coated stainless steel sheet with high transparencyInfo
- Publication number
- JP2003145671A JP2003145671A JP2001352879A JP2001352879A JP2003145671A JP 2003145671 A JP2003145671 A JP 2003145671A JP 2001352879 A JP2001352879 A JP 2001352879A JP 2001352879 A JP2001352879 A JP 2001352879A JP 2003145671 A JP2003145671 A JP 2003145671A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- coating film
- clear
- steel sheet
- clear coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、家電機器の筐体，内装
材等として好適なクリア塗装ステンレス鋼板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clear-coated stainless steel plate suitable as a housing, interior material, etc. for home appliances.
【０００２】[0002]
【従来技術及び問題点】家電機器の筐体や内装材には、
めっき鋼板に着色エナメル塗料を塗装したプレコート鋼
板が従来から一般的に使用されている。嗜好の多様化が
進む傾向にある最近では、ステンレス鋼素地の金属光沢
を活かした高級感のある外観を呈する筐体や内装材に対
する要求もあり、ステンレス鋼板の上にクリア塗膜を設
けたクリア塗装ステンレス鋼板も使用され始めている。
クリア塗装ステンレス鋼板用には、ポリエステル樹脂，
アクリル樹脂，シーリコンポリエステル樹脂，アクリル
シリコーン樹脂，フッ素樹脂等のクリア塗料が使用され
ている。塗装前処理したステンレス鋼板にクリア塗料を
塗布し、１コート１ベーク又は２コート２ベークでクリ
ア塗膜が形成される。[Prior Art and Problems] For housings and interior materials of home appliances,
A precoated steel sheet, which is a coated steel sheet coated with a colored enamel paint, has been generally used. In recent years, where the tastes are diversifying, there is a demand for housings and interior materials that have a high-class appearance that takes advantage of the metallic luster of the stainless steel base. Painted stainless steel sheets are also beginning to be used.
For clear painted stainless steel sheet, polyester resin,
Clear paints such as acrylic resin, silicone polyester resin, acrylic silicone resin, and fluorine resin are used. The clear paint is applied to the pre-painted stainless steel plate, and the clear coating film is formed by 1 coat 1 bake or 2 coat 2 bake.
【０００３】クリア塗料には、ステンレス鋼素地の金属
光沢を活かすため透明性の高い樹脂を主成分にすること
が望まれる。なかでも、ステンレス鋼素地の金属光沢が
最も高いＢＡ（光輝焼鈍）仕上げ原板では高級感のある
外観が得られるものの、反射光量も高いので、他の仕上
げ材に比較して透明性の低下，濁り，曇り等の外観劣化
が目立ちやすい。濁りは、クリア塗膜を斜め方向から観
察したときに際立って認識される。It is desired that the clear coating material contains a highly transparent resin as a main component in order to utilize the metallic luster of the stainless steel base material. Above all, the BA (bright annealed) finish plate, which has the highest metallic luster of the stainless steel substrate, gives a high-class appearance, but the amount of reflected light is also high, so the transparency and turbidity are lower than those of other finish materials. , Deterioration in appearance such as fogging is noticeable. Haze is noticeable when the clear coating is observed from an oblique direction.
【０００４】[0004]
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、クリア塗膜の鏡
面光沢を規制することにより、濁りを抑えて透明性を高
めたクリア塗装ステンレス鋼板を提供することを目的と
する。本発明のクリア塗装ステンレス鋼板は、その目的
を達成するため、６０度での鏡面光沢４００以上のクリ
ア塗膜が鋼板表面に形成されていることを特徴とする。
クリア塗膜は、ベンゼン環を含まない樹脂塗料から形成
され、屈折率１．４０以上，可視光透過率６０％以上の
塗膜であることが好ましい。The present invention has been devised to solve such a problem, and by controlling the specular gloss of a clear coating film, turbidity is suppressed and transparency is improved. The purpose is to provide a clear-painted stainless steel plate. In order to achieve the object, the clear coated stainless steel sheet of the present invention is characterized in that a clear coating film having a specular gloss of 400 or more at 60 degrees is formed on the surface of the steel sheet.
The clear coating film is preferably formed of a resin coating containing no benzene ring and has a refractive index of 1.40 or more and a visible light transmittance of 60% or more.
【０００５】[0005]
【作用】本発明者等は、クリア塗装ステンレス鋼板の表
面を観察し、透明性，濁り，曇りの有無に及ぼす塗膜性
状を種々調査した。その結果、６０度での鏡面光沢を４
００以上にすると、濁りや曇りの発生を抑えて透明度，
金属光沢が改善され、高級感のある外観が得られること
を見出した。６０度での鏡面光沢は、JIS K5600に規定
されている測定法によって求めることができる。鏡面光
沢が濁りの発生に及ぼす影響は、次のように推察され
る。濁りは塗膜表面の微細な凹凸により光が拡散反射す
ることにより生じる。この点、塗膜表面の凹凸が少なく
正反射光量が十分大きければ金属光沢が得られ、拡散反
射により正反射光量が低減すると濁りが現れる。そこ
で、６０度での鏡面光沢を４００以上にして表面の微細
な凹凸に起因する拡散反射を抑えることにより、濁りが
なく透明度の高い金属光沢を発現させる。鏡面光沢は塗
膜のレベリング性，膜厚，塗装原板の表面粗さ等によっ
て調整でき、レベリング性が高く，膜厚が厚く，塗装原
板の表面粗さが低いほど鏡面光沢が高くなる。The present inventors observed the surface of a clear coated stainless steel sheet and investigated various coating film properties that affect transparency, haze, and the presence of cloudiness. As a result, the specular gloss at 60 degrees is 4
A value of 00 or more suppresses the occurrence of turbidity or cloudiness and increases transparency,
It has been found that the metallic luster is improved and a high-quality appearance is obtained. The specular gloss at 60 degrees can be obtained by the measuring method specified in JIS K5600. The effect of specular gloss on the occurrence of turbidity is presumed as follows. Turbidity is caused by diffuse reflection of light due to fine irregularities on the surface of the coating film. In this respect, if the coating film surface has no irregularities and the amount of specular reflection light is sufficiently large, a metallic luster is obtained, and if the amount of specular reflection light is reduced by diffuse reflection, turbidity appears. Therefore, the specular gloss at 60 degrees is set to 400 or more to suppress the diffuse reflection caused by the fine irregularities on the surface, and thereby a metallic gloss having no turbidity and high transparency is developed. The specular gloss can be adjusted by the leveling property of the coating film, the film thickness, the surface roughness of the coating plate, and the higher the leveling property, the thicker the film, and the lower the surface roughness of the coating plate, the higher the specular gloss.
【０００６】クリア塗膜を光が透過する際、可視光域を
含む近紫外域での吸収が生じると、可視光透過率が低下
して濁りが生じる。可視光域を含む近紫外域での吸収
は、ベンゼン環自体の共役二重結合やベンゼン環近傍の
二重結合とベンゼン環が共役した結合に由来する。透過
光の吸収をもたらす共役結合は、分子構造にベンゼン環
をもつ樹脂塗膜を焼付け硬化したとき、或いは使用環境
に長時間放置したときに生じる。他方、ベンゼン環を含
まない樹脂塗料を使用すると、可視光透過率が６０％以
上になり、濁りや曇りがなく透明度の高いクリア塗膜が
形成される。可視光透過率は、分光光度計を用い膜厚２
０μｍのクリア塗膜を透過する波長３８０〜７８０ｎｍ
の透過光を測定し、測定光量を積分することによって求
められる。When light is transmitted through the clear coating film, if absorption occurs in the near-ultraviolet region including the visible light region, the visible light transmittance is lowered to cause turbidity. The absorption in the near-ultraviolet region including the visible light region is derived from a conjugated double bond of the benzene ring itself or a bond in which a benzene ring and a double bond near the benzene ring are conjugated. The conjugated bond that causes the absorption of transmitted light occurs when a resin coating film having a benzene ring in its molecular structure is baked and cured, or when it is left in a use environment for a long time. On the other hand, when a resin coating containing no benzene ring is used, the visible light transmittance is 60% or more, and a clear coating film having high transparency without turbidity or cloudiness is formed. Visible light transmittance is 2 using a spectrophotometer.
Wavelength 380 to 780 nm that transmits 0 μm clear coating film
It is determined by measuring the transmitted light of and measuring the amount of light.
【０００７】濁りの有無は、クリア塗膜内における透過
光の光路長によっても影響される。すなわち、クリア塗
膜に斜め方向から入射した透過光は、クリア塗膜内の光
路長が長くなるほどクリア塗膜に吸収される割合が多く
なり、結果として濁りが増加する。光路長による濁りの
増加は、クリア塗膜の屈折率を高めることにより抑制で
きる。クリア塗膜に大気中から入射した光は空気／塗膜
の界面で屈折するが、このときの屈折角はクリア塗膜の
屈折率に応じて大きくなる。大きな屈折角はステンレス
鋼基板に対して直角に近い方向に透過光が屈折すること
を意味し、結果として屈折率が高いほど透過光の光路長
が短くなる。したがって、クリア塗膜に吸収される成分
が少なくなり、クリア塗膜の濁りも抑えられる。The presence or absence of turbidity is also influenced by the optical path length of transmitted light in the clear coating film. That is, the transmitted light that is obliquely incident on the clear coating film is more likely to be absorbed by the clear coating film as the optical path length in the clear coating film is longer, resulting in an increase in turbidity. The increase in turbidity due to the optical path length can be suppressed by increasing the refractive index of the clear coating film. Light incident on the clear coating film from the atmosphere is refracted at the air / coating interface, and the refraction angle at this time becomes large according to the refractive index of the clear coating film. A large refraction angle means that the transmitted light is refracted in a direction close to a right angle with respect to the stainless steel substrate. As a result, the higher the refractive index, the shorter the optical path length of the transmitted light. Therefore, the components absorbed in the clear coating film are reduced and the turbidity of the clear coating film is suppressed.
【０００８】屈折率による濁り抑制効果は１.４０以上
の屈折率で顕著になり、６０％以上の可視光透過率が実
現される。なお、屈折率は、２０℃の雰囲気中で遊離ク
リア塗膜をナトリウムＤ光源で照射し、遊離クリア塗料
に入射した光を多波長アッベ屈折計で測定することより
求められる。遊離クリア塗膜は、ＥＴＦＥラミネート鋼
板にクリア塗料を塗布し、焼付け硬化した後でＥＴＦＥ
ラミネート鋼板から剥離することにより作製できる。６
０度での鏡面光沢４００以上，屈折率１.４０以上，可
視光透過率６０％以上のクリア塗膜は、透明性が高いこ
とからステンレス鋼素地の金属光沢を活かすことができ
る。高い透明性は、顔料，染料，メタリック顔料，パー
ル顔料を配合したクリア塗膜にあっては、より鮮やかに
顔料に色調を反映し意匠性に優れた外観をクリア塗装ス
テンレス鋼板に付与する。The effect of suppressing turbidity due to the refractive index becomes remarkable at a refractive index of 1.40 or more, and a visible light transmittance of 60% or more is realized. The refractive index is determined by irradiating the free clear coating film with a sodium D light source in an atmosphere of 20 ° C. and measuring the light incident on the free clear coating material with a multi-wavelength Abbe refractometer. The free clear coating film is obtained by applying the clear coating material to the ETFE laminated steel plate, baking it and curing it.
It can be produced by peeling from a laminated steel plate. 6
A clear coating film having a specular gloss at 0 degree of 400 or more, a refractive index of 1.40 or more, and a visible light transmittance of 60% or more has high transparency, so that the metallic luster of the stainless steel substrate can be utilized. In the case of a clear coating film in which pigments, dyes, metallic pigments, and pearl pigments are blended, high transparency gives the clear-painted stainless steel sheet an appearance that is excellent in design by more vividly reflecting the color tone of the pigment.
【０００９】[0009]
【実施の形態】クリア塗膜が形成される塗装原板には、
鋼種や仕上げ方法の如何を問わず各種ステンレス鋼板が
使用される。なかでも、ＢＡ仕上げしたステンレス鋼板
を使用すると、クリア塗膜の透明性が活用され、美麗な
外観を呈する筐体，内装材，表装材等に使用される。ス
テンレス鋼板は，塗膜の密着性を高めるため必要に応じ
て種々の塗装前処理が施される。塗装前処理には、脱
脂，クロメート処理，リン酸塩処理，タンニン酸処理，
非クロム処理（シリカ系，ジルコニア系，チタン系等）
等がある。塗装前処理されたステンレス鋼板にロールコ
ート，カーテンコート，スプレー，浸漬法等によってク
リア塗料が塗布され、たとえば２００〜３００℃で焼き
付けることによりクリア塗膜が形成される。BEST MODE FOR CARRYING OUT THE INVENTION
Various stainless steel plates are used regardless of steel type and finishing method. Above all, when a stainless steel sheet with BA finish is used, the transparency of the clear coating film is utilized, and it is used for a case, an interior material, a surface material, etc. that have a beautiful appearance. Stainless steel sheets are subjected to various pre-coating treatments as necessary to enhance the adhesion of the coating film. Pre-painting treatment includes degreasing, chromate treatment, phosphate treatment, tannic acid treatment,
Chromium-free treatment (silica, zirconia, titanium, etc.)
Etc. A clear paint is applied to the pre-painted stainless steel plate by roll coating, curtain coating, spraying, dipping or the like, and baked at 200 to 300 ° C. to form a clear coating film.
【００１０】使用可能なクリア塗料は、６０度での鏡面
光沢４００以上で、好ましくは屈折率１.４０以上、可
視光透過率６０％以上のクリア塗膜が形成される限り特
に樹脂種に制約を受けるものではないが、具体的にはア
クリル樹脂，アクリルシリコーン樹脂，アクリルフッ素
樹脂，フッ素樹脂等を樹脂ベースにした樹脂塗料が使用
される。クリア塗料には、必要に応じて顔料，染料，メ
タリック顔料，パール顔料を配合しても良い。クリア塗
膜は、２〜２０μｍ程度の膜厚で、単層又は複層の塗膜
としてステンレス鋼板上に設けられる。複層構成のクリ
ア塗膜を形成する場合、最表層から下層に向けて屈折率
が高くなるように塗料を選定することが好ましい。The usable clear paint has a specular gloss of 400 or more at 60 degrees, and preferably has a refractive index of 1.40 or more and a visible light transmittance of 60% or more. Although not subject to the above, specifically, a resin paint based on a resin such as acrylic resin, acrylic silicone resin, acrylic fluororesin, or fluororesin is used. The clear paint may be blended with pigments, dyes, metallic pigments and pearl pigments, if necessary. The clear coating film has a thickness of about 2 to 20 μm and is provided as a single-layer or multi-layer coating film on a stainless steel plate. When forming a clear coating film having a multilayer structure, it is preferable to select the coating material so that the refractive index increases from the outermost layer to the lower layer.
【００１１】[0011]
【実施例】ＢＡ仕上げ，ヘアライン仕上げ，Ｎｏ.４仕
上げ（JIS R6001 １５０〜１８０メッシュの研磨剤を
塗布したベルトによる研磨）した板厚０.５ｍｍのステ
ンレス鋼板を塗布型クロメート処理し、Ｃｒ換算付着量
２０ｍｇ／ｍ2のクロメート皮膜を形成した。次いで、
表１に示すクリア塗膜をステンレス鋼板に塗布し、２１
５〜２５０℃で３０〜６０秒加熱する１コート１ベーク
により乾燥膜厚１０μｍの１コートクリア塗膜を形成し
た。一部のステンレス鋼板については、膜厚５μｍの下
塗り塗膜を形成した後、同様な方法で膜厚１０μｍの上
塗り塗膜を形成する２コート２ベーク方式でクリア塗膜
を形成した。[Example] BA finish, hairline finish, No. 4 finish (polishing with a belt coated with JIS R6001 150-180 mesh abrasive) 0.5 mm thick stainless steel plate was applied chromate treatment and applied as Cr conversion An amount of 20 mg / m 2 of chromate film was formed. Then
Apply the clear coating film shown in Table 1 to the stainless steel plate, and
A 1-coat 1-bake heating at 5-250 ° C. for 30-60 seconds formed a 1-coat clear coating film having a dry film thickness of 10 μm. For some of the stainless steel sheets, a clear coating film was formed by a two-coat two-bake method in which an undercoating film having a film thickness of 5 μm was formed and then an overcoating film having a film thickness of 10 μm was formed by the same method.
【００１２】 [0012]
【００１３】得られた各クリア塗装ステンレス鋼板から
試験片を切り出し、JIS K5600に準拠して６０度での鏡
面光沢を測定すると共に、次の試験方法で外観を調査し
た。
外観試験１
クリア塗膜の表面を垂直方向から目視観察し、濁りが目
立つものを×，僅かに濁りが観察されたものを△，濁り
が検出されなかったものを○として濁り具合を官能評価
した。
外観試験２
法線に関して６０度の角度でクリア塗膜の表面を目視観
察し、濁りが目立つものを×，僅かに濁りが観察された
ものを△，濁りが検出されなかったものを○として濁り
具合を官能評価した。Specimens were cut out from each of the obtained clear coated stainless steel plates, the specular gloss at 60 degrees was measured according to JIS K5600, and the appearance was examined by the following test method. Appearance test 1 The surface of the clear coating film was visually observed from the vertical direction. When the turbidity was noticeable, x was evaluated, when slight turbidity was observed, Δ was evaluated, and when turbidity was not detected, turbidity was sensory evaluated. . Appearance test 2 Visually observe the surface of the clear coating film at an angle of 60 degrees with respect to the normal line. Marked turbidity is x, slight turbidity was observed as ∆, and turbidity was not detected as turbidity. The condition was sensory evaluated.
【００１４】表２の試験結果にみられるように、本発明
の範囲内である実施例１〜１２は優れた光沢，透明性を
示すが、屈折率，透過率が範囲外である比較例１３〜１
５では濁り，曇りが目立っていた。As can be seen from the test results in Table 2, Examples 1 to 12 which are within the scope of the present invention show excellent gloss and transparency, but Comparative Example 13 in which the refractive index and the transmittance are out of the ranges. ~ 1
No. 5 was cloudy and cloudy.
【００１５】 [0015]
【００１６】[0016]
【発明の効果】以上に説明したように、本発明のクリア
塗装ステンレス鋼板は、濁りがなく透明性の高いクリア
塗膜を表面に形成しているのでステンレス鋼素地の美麗
な金属光沢を活用でき、意匠性に優れた家電機器の筐
体，内装材，表装材等として使用される。As explained above, the clear-coated stainless steel sheet of the present invention has a clear transparent coating film without turbidity formed on the surface thereof, so that the beautiful metallic luster of the stainless steel substrate can be utilized. It is used as a housing, interior material, and surface material for home appliances with excellent design.
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【手続補正書】[Procedure amendment]
【提出日】平成１５年１月１５日（２００３．１．１
５）[Submission date] January 15, 2003 (2003.1.1
5)
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００４[Correction target item name] 0004
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００４】[0004]
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、クリア塗膜の鏡
面光沢を規制することにより、濁りを抑えて透明性を高
めたクリア塗装ステンレス鋼板を提供することを目的と
する。本発明のクリア塗装ステンレス鋼板は、その目的
を達成するため、鋼板表面に、ベンゼン環を含まない樹
脂塗料から形成され、屈折率が１．４０以上で，膜厚２
０μｍのときの可視光透過率が６０％以上であるクリア
塗膜を有し、６０度での鏡面光沢が４００以上であるこ
とを特徴とする。The present invention has been devised to solve such a problem, and by controlling the specular gloss of a clear coating film, turbidity is suppressed and transparency is improved. The purpose is to provide a clear-painted stainless steel plate. In order to achieve the object, the clear-painted stainless steel sheet of the present invention is formed from a resin coating containing no benzene ring on the surface of the steel sheet, has a refractive index of 1.40 or more, and a film thickness of 2
It has a clear coating film having a visible light transmittance of 60% or more at 0 μm, and has a specular gloss of 400 or more at 60 degrees.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Name of item to be corrected] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００５】[0005]
【作用】本発明者等は、クリア塗装ステンレス鋼板の表
面を観察し、透明性，濁り，曇りの有無に及ぼす塗膜性
状を種々調査した。その結果、クリア塗装ステンレス鋼
板の６０度での鏡面光沢を４００以上にすると、濁りや
曇りの発生を抑えて透明度，金属光沢が改善され、高級
感のある外観が得られることを見出した。６０度での鏡
面光沢は、JIS K5600に規定されている測定法によって
求めることができる。鏡面光沢が濁りの発生に及ぼす影
響は、次のように推察される。濁りは塗膜表面の微細な
凹凸により光が拡散反射することにより生じる。この
点、塗膜表面の凹凸が少なく正反射光量が十分大きけれ
ば金属光沢が得られ、拡散反射により正反射光量が低減
すると濁りが現れる。そこで、表面の微細な凹凸に起因
する拡散反射を抑え、クリア塗装ステンレス鋼板の６０
度での鏡面光沢を４００以上にすることにより、濁りが
なく透明度の高い金属光沢を発現させる。鏡面光沢は塗
膜のレベリング性，膜厚，塗装原板の表面粗さ等によっ
て調整でき、レベリング性が高く，膜厚が厚く，塗装原
板の表面粗さが低いほど鏡面光沢が高くなる。The present inventors observed the surface of a clear coated stainless steel sheet and investigated various coating film properties that affect transparency, haze, and the presence of cloudiness. As a result, it has been found that when the clear coated stainless steel sheet has a specular gloss at 60 degrees of 400 or more, turbidity or cloudiness is suppressed, transparency and metallic luster are improved, and a high-class appearance can be obtained. The specular gloss at 60 degrees can be obtained by the measuring method specified in JIS K5600. The effect of specular gloss on the occurrence of turbidity is presumed as follows. Turbidity is caused by diffuse reflection of light due to fine irregularities on the surface of the coating film. In this respect, if the coating film surface has no irregularities and the amount of specular reflection light is sufficiently large, a metallic luster is obtained, and if the amount of specular reflection light is reduced by diffuse reflection, turbidity appears. Therefore, the diffuse reflection caused by the fine irregularities on the surface is suppressed, and the clear coated stainless steel plate 60
By setting the specular gloss at a degree of 400 or more, a highly transparent metallic gloss without turbidity is developed. The specular gloss can be adjusted by the leveling property of the coating film, the film thickness, and the surface roughness of the coated original plate.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００６】クリア塗膜を光が透過する際、可視光域を
含む近紫外域での吸収が生じると、可視光透過率が低下
して濁りが生じる。可視光域を含む近紫外域での吸収
は、ベンゼン環自体の共役二重結合やベンゼン環近傍の
二重結合とベンゼン環が共役した結合に由来する。透過
光の吸収をもたらす共役結合は、分子構造にベンゼン環
をもつ樹脂塗膜を焼付け硬化したとき、或いは使用環境
に長時間放置したときに生じる。他方、ベンゼン環を含
まない樹脂塗料を使用すると、膜厚２０μｍのときの可
視光透過率が６０％以上になり、濁りや曇りがなく透明
度の高いクリア塗膜が形成される。なお、膜厚２０μｍ
のときの可視光透過率は、分光光度計を用い膜厚２０μ
ｍのクリア塗膜を透過する波長３８０〜７８０ｎｍの透
過光を測定し、測定光量を積分することによって求めら
れる。When light is transmitted through the clear coating film, if absorption occurs in the near-ultraviolet region including the visible light region, the visible light transmittance is lowered to cause turbidity. The absorption in the near-ultraviolet region including the visible light region is derived from a conjugated double bond of the benzene ring itself or a bond in which a benzene ring and a double bond near the benzene ring are conjugated. The conjugated bond that causes the absorption of transmitted light occurs when a resin coating film having a benzene ring in its molecular structure is baked and cured, or when it is left in a use environment for a long time. On the other hand, when a resin coating containing no benzene ring is used, the visible light transmittance at a film thickness of 20 μm is 60% or more, and a clear coating film having high transparency without turbidity or cloudiness is formed. The film thickness is 20 μm
The visible light transmittance at this time was 20 μm using a spectrophotometer.
It is determined by measuring transmitted light having a wavelength of 380 to 780 nm that passes through the clear coating film of m and integrating the measured light amount.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００８[Correction target item name] 0008
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００８】屈折率による濁り抑制効果は１.４０以上
の屈折率で顕著になり、膜厚２０μｍのときの可視光透
過率が６０％以上であるときに実現される。なお、屈折
率は、２０℃の雰囲気中で遊離クリア塗膜をナトリウム
Ｄ光源で照射し、遊離クリア塗料に入射した光を多波長
アッベ屈折計で測定することより求められる。遊離クリ
ア塗膜は、ＥＴＦＥラミネート鋼板にクリア塗料を塗布
し、焼付け硬化した後でＥＴＦＥラミネート鋼板から剥
離することにより作製できる。屈折率１.４０以上で，
膜厚２０μｍのときの可視光透過率６０％以上のクリア
塗膜を有し、６０度での鏡面光沢を４００以上にしたク
リア塗装ステンレス鋼板は、透明性が高いことからステ
ンレス鋼素地の金属光沢を活かすことができる。高い透
明性は、顔料，染料，メタリック顔料，パール顔料を配
合したクリア塗膜にあっては、より鮮やかに顔料に色調
を反映し意匠性に優れた外観をクリア塗装ステンレス鋼
板に付与する。The effect of suppressing turbidity due to the refractive index becomes remarkable at a refractive index of 1.40 or more, and is realized when the visible light transmittance at a film thickness of 20 μm is 60% or more. The refractive index is determined by irradiating the free clear coating film with a sodium D light source in an atmosphere of 20 ° C. and measuring the light incident on the free clear coating material with a multi-wavelength Abbe refractometer. The free clear coating film can be prepared by applying a clear coating material to an ETFE laminated steel sheet, baking and curing it, and then peeling it from the ETFE laminated steel sheet. With a refractive index of 1.40 or higher,
A clear-coated stainless steel plate with a clear coating film with a visible light transmittance of 60% or more at a film thickness of 20 μm and a specular gloss of 400 or more at 60 degrees is highly transparent, so the metallic luster of the stainless steel substrate. Can be utilized. In the case of a clear coating film in which pigments, dyes, metallic pigments, and pearl pigments are blended, high transparency gives the clear-painted stainless steel sheet an appearance that is excellent in design by more vividly reflecting the color tone of the pigment.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１０】使用可能なクリア塗料は、屈折率１.４０
以上、膜厚２０μｍのときの可視光透過率６０％以上の
クリア塗膜であって、ステンレス鋼板に塗布したとき塗
装鋼板が６０度での鏡面光沢４００以上になるようなも
のである限り、特に樹脂種に制約を受けるものではない
が、具体的にはアクリル樹脂，アクリルシリコーン樹
脂，アクリルフッ素樹脂，フッ素樹脂等を樹脂ベースに
した樹脂塗料が使用される。クリア塗料には、必要に応
じて顔料，染料，メタリック顔料，パール顔料を配合し
ても良い。クリア塗膜は、２〜２０μｍ程度の膜厚で、
単層又は複層の塗膜としてステンレス鋼板上に設けられ
る。複層構成のクリア塗膜を形成する場合、最表層から
下層に向けて屈折率が高くなるように塗料を選定するこ
とが好ましい。A clear paint that can be used has a refractive index of 1.40.
As described above, as long as it is a clear coating film having a visible light transmittance of 60% or more when the film thickness is 20 μm and the coated steel sheet has a specular gloss of 400 or more at 60 degrees when applied to a stainless steel sheet, Although not restricted by the type of resin, specifically, a resin coating based on a resin such as acrylic resin, acrylic silicone resin, acrylic fluororesin, or fluororesin is used. The clear paint may be blended with pigments, dyes, metallic pigments and pearl pigments, if necessary. The clear coating film has a film thickness of about 2 to 20 μm,
It is provided as a single-layer or multi-layer coating film on a stainless steel plate. When forming a clear coating film having a multilayer structure, it is preferable to select the coating material so that the refractive index increases from the outermost layer to the lower layer.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１１】[0011]
【実施例】ＢＡ仕上げ，ヘアライン仕上げ，Ｎｏ.４仕
上げ（JIS R6001 １５０〜１８０メッシュの研磨剤を
塗布したベルトによる研磨）した板厚０.５ｍｍのステ
ンレス鋼板を塗布型クロメート処理し、Ｃｒ換算付着量
２０ｍｇ／ｍ２のクロメート皮膜を形成した。次いで、
表１に示すクリア塗膜をステンレス鋼板に塗布し、２１
５〜２５０℃で３０〜６０秒加熱する１コート１ベーク
により乾燥膜厚１０μｍの１コートクリア塗膜を形成し
た。一部のステンレス鋼板については、膜厚５μｍの下
塗り塗膜を形成した後、同様な方法で膜厚１０μｍの上
塗り塗膜を形成する２コート２ベーク方式でクリア塗膜
を形成した。なお、表１中の透過率は、別途、膜厚２０
μｍの塗膜を形成して測定したものである。[Example] BA finish, hairline finish, No. 4 finish (polishing with a belt coated with JIS R6001 150-180 mesh abrasive) 0.5 mm thick stainless steel plate was applied chromate treatment and applied as Cr conversion An amount of 20 mg / m 2 of chromate film was formed. Then
Apply the clear coating film shown in Table 1 to the stainless steel plate, and
A 1-coat 1-bake heating at 5-250 ° C. for 30-60 seconds formed a 1-coat clear coating film having a dry film thickness of 10 μm. For some of the stainless steel sheets, a clear coating film was formed by a two-coat two-bake method in which an undercoating film having a film thickness of 5 μm was formed and then an overcoating film having a film thickness of 10 μm was formed by the same method. In addition, the transmittance in Table 1 is the film thickness 20 separately.
It is measured by forming a coating film of μm.
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Name of item to be corrected] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】 [0015]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森 浩治 千葉県市川市高谷新町７番１号 日新製鋼 株式会社技術研究所内 Ｆターム(参考） 4D075 CB06 DA03 DB04 DC02 DC18 4F100 AB04A AK01B AK17 AK25 AK41 BA02 CC00B GB08 GB48 JM02 JN01B JN08 JN18 JN21B JN24 YY00 4J038 CD091 CD141 CG141 DL101 EA011 FA231 FA241 NA01 PC02 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koji Mori 7-1 Takaya Shinmachi, Ichikawa City, Chiba Prefecture Nisshin Steel Technical Research Institute Co., Ltd. F-term (reference) 4D075 CB06 DA03 DB04 DC02 DC18 4F100 AB04A AK01B AK17 AK25 AK41 BA02 CC00B GB08 GB48 JM02 JN01B JN08 JN18 JN21B JN24 YY00 4J038 CD091 CD141 CG141 DL101 EA011 FA231 FA241 NA01 PC02
Claims (2)
塗膜が鋼板表面に形成されていることを特徴とする透明
性に優れたクリア塗装ステンレス鋼板。1. A clear-painted stainless steel sheet having excellent transparency, wherein a clear coating film having a specular gloss of 400 or more at 60 degrees is formed on the surface of the steel sheet.
脂塗料から形成され、屈折率が１．４０以上，可視光透
過率が６０％以上である請求項１記載のクリア塗装ステ
ンレス鋼板。2. The clear coated stainless steel sheet according to claim 1, wherein the clear coating film is formed of a resin coating material containing no benzene ring, and has a refractive index of 1.40 or more and a visible light transmittance of 60% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001352879A JP3429292B2 (en) | 2001-11-19 | 2001-11-19 | Clear coated stainless steel plate with excellent transparency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001352879A JP3429292B2 (en) | 2001-11-19 | 2001-11-19 | Clear coated stainless steel plate with excellent transparency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003145671A true JP2003145671A (en) | 2003-05-20 |
| JP3429292B2 JP3429292B2 (en) | 2003-07-22 |
Family
ID=19164997
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001352879A Expired - Lifetime JP3429292B2 (en) | 2001-11-19 | 2001-11-19 | Clear coated stainless steel plate with excellent transparency |
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| Country | Link |
|---|---|
| JP (1) | JP3429292B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1834759A1 (en) * | 2006-03-15 | 2007-09-19 | Whirlpool Corporation | Tinted anti-fingerprint coating on 430 stainless steel for appliances |
| JP2008149584A (en) * | 2006-12-18 | 2008-07-03 | Nippon Steel & Sumikin Coated Sheet Corp | Coated metal sheet |
| JPWO2007013232A1 (en) * | 2005-07-28 | 2009-02-05 | 新日本製鐵株式会社 | Pre-coated metal plate and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03271379A (en) * | 1990-03-20 | 1991-12-03 | Kawasaki Steel Corp | Stainless steel sheet to be coated and coated steel sheet |
| JPH07108220A (en) * | 1993-10-15 | 1995-04-25 | Nippon Yakin Kogyo Co Ltd | Painted steel panel excellent in weatherability and close adhesiveness and production thereof |
| JPH0985880A (en) * | 1995-09-25 | 1997-03-31 | Nkk Corp | Clear coating stainless steel sheet |
| JP2000279880A (en) * | 1999-03-29 | 2000-10-10 | Nisshin Steel Co Ltd | Stainless steel plate coated with transparent fluoroplastic coating with high wear resistance, finger printing-proofness, and excellent design property |
| JP2001009367A (en) * | 1999-06-24 | 2001-01-16 | Nisshin Steel Co Ltd | High hardness transparent fluoroplastic coated stainless steel panel and production method thereof |
-
2001
- 2001-11-19 JP JP2001352879A patent/JP3429292B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03271379A (en) * | 1990-03-20 | 1991-12-03 | Kawasaki Steel Corp | Stainless steel sheet to be coated and coated steel sheet |
| JPH07108220A (en) * | 1993-10-15 | 1995-04-25 | Nippon Yakin Kogyo Co Ltd | Painted steel panel excellent in weatherability and close adhesiveness and production thereof |
| JPH0985880A (en) * | 1995-09-25 | 1997-03-31 | Nkk Corp | Clear coating stainless steel sheet |
| JP2000279880A (en) * | 1999-03-29 | 2000-10-10 | Nisshin Steel Co Ltd | Stainless steel plate coated with transparent fluoroplastic coating with high wear resistance, finger printing-proofness, and excellent design property |
| JP2001009367A (en) * | 1999-06-24 | 2001-01-16 | Nisshin Steel Co Ltd | High hardness transparent fluoroplastic coated stainless steel panel and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2007013232A1 (en) * | 2005-07-28 | 2009-02-05 | 新日本製鐵株式会社 | Pre-coated metal plate and manufacturing method thereof |
| JP4808717B2 (en) * | 2005-07-28 | 2011-11-02 | 新日本製鐵株式会社 | Pre-coated metal plate and manufacturing method thereof |
| EP1834759A1 (en) * | 2006-03-15 | 2007-09-19 | Whirlpool Corporation | Tinted anti-fingerprint coating on 430 stainless steel for appliances |
| JP2008149584A (en) * | 2006-12-18 | 2008-07-03 | Nippon Steel & Sumikin Coated Sheet Corp | Coated metal sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3429292B2 (en) | 2003-07-22 |
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