JPH07126826A - Precoated steel sheet for weight shutter - Google Patents
Precoated steel sheet for weight shutterInfo
- Publication number
- JPH07126826A JPH07126826A JP27518293A JP27518293A JPH07126826A JP H07126826 A JPH07126826 A JP H07126826A JP 27518293 A JP27518293 A JP 27518293A JP 27518293 A JP27518293 A JP 27518293A JP H07126826 A JPH07126826 A JP H07126826A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- coating
- coating film
- thickness
- coated
- 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.)
- Granted
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は長期間に渡って重量シャ
ッター用素材として使用される耐食性に優れた重量シャ
ッター用プレコート塗装鋼板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-coated steel sheet for heavy-duty shutters, which is used as a material for heavy-duty shutters for a long period of time and has excellent corrosion resistance.
【０００２】[0002]
【従来の技術】従来から亜鉛メッキ鋼板が、その他のメ
ッキ鋼板に較べ耐食性が優れている利点から、外装建材
として多く使用されている。しかしながら、大気や水質
の汚染から亜鉛の溶出が著しく防食効果が期待できなく
なった問題から、亜鉛メッキ鋼板に樹脂層を積層した塗
装鋼板が例えば特開昭５６−１５７３５１号公報の「亜
鉛メッキ鋼板にアクリル変性エポキシ樹脂系をプライマ
ーし、その上に赤色塩化ビニルゾルエナメルを塗装した
鋼板」、特開昭５７−２１９７２号公報の「亜鉛メッキ
鋼板に、発砲性ポリエチレン塗料を塗装した鋼板」など
多くの種類が開発され該鋼板がもつ表面の美しさや耐食
性などを活かし、プレコート塗装鋼板として例えば間仕
切り板、屋根板、シャッターなど建築物の内外装材に使
用されている。これらのプレコート塗装鋼板は用途と性
能を基準に板厚が設定されるが、作業現場において曲げ
たり、折ったりあるいは切断したり加工し易くまた運び
易い作業上の利点から、厚みが０．３５〜０．８ｍｍの
薄い原板が使用されている。2. Description of the Related Art Conventionally, galvanized steel sheets have been widely used as exterior building materials because of their superior corrosion resistance compared to other galvanized steel sheets. However, because of the problem that zinc is significantly eluted from the pollution of air and water and the anticorrosive effect cannot be expected, a coated steel sheet obtained by laminating a resin layer on a galvanized steel sheet is disclosed in, for example, Japanese Unexamined Patent Publication No. 56-157351. Many such as "a steel plate coated with red vinyl chloride sol enamel on which an acrylic-modified epoxy resin system has been applied as a primer" and "a steel plate coated with a foaming polyethylene paint on a galvanized steel plate" disclosed in JP-A-57-21972. Various types have been developed and, taking advantage of the beauty of the surface and corrosion resistance of the steel sheet, they are used as pre-coated steel sheets, for example, as partition boards, roof boards, shutters, and other interior and exterior materials for buildings. The thickness of these pre-coated steel sheets is set based on the application and performance, but it is easy to bend, fold, or cut at the work site, and is easy to carry. A thin original plate of 0.8 mm is used.
【０００３】しかし大型店や大型貯蔵倉庫や工場ではシ
ャッターのサイズも大きく強度上従来の板厚のものでは
耐えられないため、より厚い１．２〜２．３ｍｍ板厚の
重量シャッターが使用されて来た。しかしながらこの様
な厚板の亜鉛メッキ鋼板をシャッター用としてプレコー
トメタル化したものはなく、未塗装の厚板亜鉛メッキ鋼
板を加工組立て後現地においてプライマーとして常温乾
燥性の溶融亜鉛メッキプライマー例えば二液型エポキシ
プライマーやエッチングプライマーを塗装しその上に上
塗として密着性と耐摩耗性に優れたアクリルラッカーや
二液型アクリルウレタン塗料を塗装しているのが現状で
ある。However, in large stores, large storage warehouses and factories, since the shutter size is large and the strength of conventional shutters cannot be tolerated, a thicker shutter of 1.2 to 2.3 mm is used. I came. However, there is no pre-coated metal plate made of such a thick galvanized steel sheet for shutters, and after processing and assembling an unpainted thick galvanized steel sheet, it is used as a primer in the field at room temperature. The current situation is to coat an epoxy primer or an etching primer and then coat an acrylic lacquer or a two-component acrylic urethane paint, which has excellent adhesion and abrasion resistance, as the top coat.
【０００４】[0004]
【発明が解決しようとする課題】この現地塗装は塗装経
費の増加以外に溶剤の飛散等による火災の危険性や人体
にもよくなく、公害の発生の源ともなるため、通常のプ
レコートメタルシャッター同様にプレコート化が求めら
れて来た。重量シャッターのプレコートメタル化が出来
なかった理由としては、板厚が厚いため加工時に大きな
塗膜の伸びを必要としたことにある。例えば鋼板に内径
５ｍｍの曲げ加工を与える場合、下式によって通常シャ
ッター用０．５ｍｍ厚の鋼板ではプレコート品の塗膜は
９％の伸びでよいが、重量シャッター用の２．０ｍｍ厚
の鋼板では実にプレコートの塗膜として２９％の伸びを
要することになる。In addition to the increase in painting cost, this on-site painting is not good for the human body and the risk of fire due to the scattering of solvents, and it is a source of pollution. There has been a demand for precoating. The reason why heavy shutters could not be pre-coated with metal was that the plate thickness was so large that a large coating film elongation was required during processing. For example, when a steel plate is bent with an inner diameter of 5 mm, the coating film of a pre-coated product may be stretched by 9% in the case of a 0.5 mm-thick steel plate for a normal shutter according to the following formula, but with a 2.0 mm-thick steel plate for a heavy shutter, Indeed, a precoat coating film of 29% elongation is required.
【０００５】塗膜の伸び率＝ｔ／（２ｒ＋ｔ）×１００ ｔ：鋼板の厚さ ｒ：マンドレルの半径 また板厚に伴う単位塗膜当りの荷重の増大のため、裏面
塗料との摩擦によるキズの発生やブロッキング等に耐え
る塗料、塗装系が開発されていなかったことによる。Elongation of coating film = t / (2r + t) × 100 t: Thickness of steel plate r: Radius of mandrel Further, since load per unit coating film increases with plate thickness, scratches due to friction with back surface coating material This is due to the fact that paints and coating systems that withstand the occurrence of heat generation and blocking have not been developed.
【０００６】[0006]
【課題を解決するための手段】本発明は上記のような問
題を解消し、塗料塗装膜の密着性、耐摩耗性、光沢さら
には屈曲性の優れた重量シャッター用プレコート塗装鋼
板を提供することを目的としたもので、その要旨は、厚
みが１．２〜２．３ｍｍの鋼板に目付量が９０〜３００
ｇ／ｍ2 のＺｎメッキを施して化成処理した溶融亜鉛メ
ッキ鋼板または合金化溶融亜鉛メッキ鋼板の片面または
両面に、伸び率：２０％以上の樹脂で厚さ３〜１０μｍ
のプライマー塗装を施し、その上に伸び率：３０％以
上、硬度：Ｈ以上、屈曲：１Ｔ〜４Ｔ（Ｔ：原板厚みの
曲率半径），耐摩耗性：荷重２０ｋｇで往復１００回以
上擦っても加傷されない特性をもつ塗料で厚さ９〜３０
μｍの上塗塗装を施した重量シャッター用プレコート塗
装鋼板である。DISCLOSURE OF THE INVENTION The present invention solves the above problems and provides a pre-coated steel sheet for heavy-duty shutters, which has excellent adhesion, abrasion resistance, luster, and flexibility of a paint coating film. The purpose is to provide a steel plate having a thickness of 1.2 to 2.3 mm with a basis weight of 90 to 300.
One side or both sides of galvanized steel sheet or alloyed hot-dip galvanized steel sheet which has been subjected to chemical conversion treatment by applying Zn plating of g / m 2 with a resin having an elongation of 20% or more and a thickness of 3 to 10 μm.
After applying the primer coating of 30% or more, elongation: 30% or more, hardness: H or more, bending: 1T to 4T (T: radius of curvature of original plate thickness), wear resistance: even if rubbed with a load of 20 kg 100 times or more back and forth 9 ~ 30 thickness with paint that does not damage
It is a pre-coated steel sheet for heavy shutters with a top coating of μm.
【０００７】以下、本発明について詳細に説明する。通
常の薄板製造工程を経て製造された厚みが１．２〜２．
３ｍｍの鋼板に目付量が９０〜３００ｇ／ｍ2 のＺｎあ
るいはさらにＡｌ，Ｍｇなどのメッキ特性向上成分の少
量を添加した溶融Ｚｎメッキ層を施した溶融Ｚｎメッキ
鋼板または合金化溶融亜鉛メッキ鋼板を化成処理する。
本発明において、厚みが１．２〜２．３ｍｍの鋼板を使
用することは風圧や軽度の衝撃に変形することなく所定
の成形形状が保持される必要な厚さで、１．２ｍｍ未満
の薄い鋼板では振動や衝撃で容易に変形して塗装膜を剥
離し、その反対に、２．３ｍｍを越えて厚い鋼板になる
と加工作業やシャッターの開閉作業に問題が生じてく
る。またＺｎの目付量が９０〜３００ｇ／ｍ2 は塗装膜
が剥離しても耐食性が保持できる量で、９０ｇ／ｍ 2 未
満の薄目付量では耐食性が不十分でメッキ原板の腐食を
早め、３００ｇ／ｍ 2 を越えると耐食性の向上が過飽和
域になり自ら剥離し易くなる。The present invention will be described in detail below. Communication
The thickness manufactured through the ordinary thin plate manufacturing process is 1.2 to 2.
A basis weight of 90 to 300 g / m on a 3 mm steel plate2 Zn
In addition, the amount of components that improve plating characteristics such as Al and Mg is small.
Hot-dip Zn plating with added amount of hot-dip Zn plating layer
Chemical conversion treatment of a steel plate or a galvannealed steel plate.
In the present invention, a steel plate having a thickness of 1.2 to 2.3 mm is used.
It can be used as specified without being deformed by wind pressure or light impact.
The required thickness to maintain the molded shape of, less than 1.2mm
Thin steel plate easily deforms due to vibration and shock to remove the coating film.
Release, on the contrary, a thick steel plate exceeding 2.3 mm
And processing and shutter opening and closing problems will occur.
It Further, the basis weight of Zn is 90 to 300 g / m2 Is a coating film
90g / m2, which can maintain corrosion resistance even when peeled off 2 Not yet
Corrosion resistance is not sufficient with a full weight, and corrosion of the plating base plate
Early, 300 g / m 2 If it exceeds, the improvement of corrosion resistance is supersaturated.
It becomes a region and it becomes easy to peel off itself.
【０００８】さらに本発明では化成処理を施す。化成処
理はメッキ表面に非金属化合物の皮膜を作って防食性、
耐摩耗性と塗装下地性を改善するもので、クロメート処
理や燐酸塩処理など一般に使用される処理が施される。
又塗布型クロメートを塗布することもある。このように
下地処理された溶融亜鉛メッキ鋼板または合金化溶融亜
鉛メッキ鋼板の片面または両面に、ロールコーター、ス
プレー、フローコーターなど一般に使用される塗装法に
よって、プライマー塗装が施される。プライマー塗装膜
はメッキ鋼板に付着して腐食を防止すると共に上塗塗装
膜との付着性を高めるもので、線状高分子ポリエステル
系、オイルフリーポリエステル系、エポキシ変性系、エ
ポキシエステル系、ウレタン変性エポキシエステル系、
フェノキシ系などを主要樹脂にしてアミノ樹脂、ブロッ
クイソシアネートなどの架橋剤、ストロンチウムクロメ
ート、ジンクロメート、リン酸亜鉛、トリポリリン酸ア
ルミニウムなどの防錆顔料（防錆顔料の含有率は、２〜
２０％が好ましい）酸化チタンや体質顔料などの一般顔
料を配合して伸び率が前記した式で２０％以上に調製さ
れた塗料で、厚さ３〜１０μｍの塗装膜を施す。Further, in the present invention, a chemical conversion treatment is performed. The chemical conversion treatment forms a non-metallic compound film on the plating surface to prevent corrosion.
It improves the abrasion resistance and the coating base property, and is subjected to commonly used treatments such as chromate treatment and phosphate treatment.
Also, a coating type chromate may be applied. The primer coating is applied to one surface or both surfaces of the hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet that has been subjected to the above-mentioned surface treatment by a commonly used coating method such as a roll coater, a spray coater or a flow coater. The primer coating film adheres to the plated steel plate to prevent corrosion and enhances the adhesion to the top coating film. Linear polymer polyester type, oil free polyester type, epoxy modified type, epoxy ester type, urethane modified epoxy Ester-based,
Amino resins using phenoxy-based resins as main resins, cross-linking agents such as blocked isocyanates, strontium chromate, zinc chromate, zinc phosphate, rust preventive pigments such as aluminum tripolyphosphate (the content of rust preventive pigment is 2 to
A coating film having a thickness of 3 to 10 μm is applied with a paint prepared by blending a general pigment such as titanium oxide or an extender pigment to have an elongation of 20% or more according to the above formula.
【０００９】プライマー塗装膜の伸び率は、本発明の塗
装鋼板が各種の形状に曲げや絞り加工される際にメッキ
鋼板から剥離される事なく密着性を付与するに必要な延
性で、その率が高い程好ましい。この場合の塗装膜につ
いても、３μｍ未満の薄い層では耐食性や耐薬品性が得
られず、その反対に１０μｍを越える厚い層では各種の
形状に加工時に亀裂を生じて耐食性などの効果を劣化す
る問題がある。The elongation of the primer coating film is the ductility necessary for imparting adhesion without peeling from the coated steel sheet when the coated steel sheet of the present invention is bent or drawn into various shapes, and its rate Is higher, the more preferable. With respect to the coating film in this case as well, corrosion resistance and chemical resistance cannot be obtained in a thin layer of less than 3 μm, and conversely, in a thick layer of more than 10 μm, cracks are formed during processing in various shapes and the effects such as corrosion resistance are deteriorated. There's a problem.
【００１０】さらに本発明は、プライマー塗装と同様
に、各種の塗装法を使用して上塗塗装を施す。上塗塗料
は耐摩耗性、加工性を満たすと共に塗装外観性、耐候
性、耐水性、耐薬品性など重量シャッター用プレコート
塗装鋼板に要求される性質を付与するものであって、オ
イルフリーポリエステル、アルキッド、熱硬化アクリ
ル、シリコンポリエステル、フッ素アクリル系、フッ素
ビニール系の主要樹脂にアミノ樹脂系、ブロックイソシ
アネートなどの架橋剤を配合した樹脂、さらにはフッ化
ビニリデン−アクリル系の樹脂などを使用し、更に酸化
チタン、カーボンブラックなどの一般顔料を配合する
が、本発明においては、特に伸び率が前記した式で３０
％以上、硬度がＨ以上、屈曲が１Ｔ〜４Ｔ（Ｔ：原板厚
みの曲率半径），耐摩耗性が荷重２０ｋｇで往復１００
回以上の特性をもつよう調製された塗料で厚さ９〜３０
μｍで塗装する。Further, in the present invention, similarly to the primer coating, the top coating is applied by using various coating methods. Topcoat paints are those that meet the wear resistance and workability requirements, as well as impart the properties required for pre-coated steel sheets for heavy-duty shutters, such as paint appearance, weather resistance, water resistance, and chemical resistance. , Thermosetting acrylic, silicone polyester, fluoroacryl-based, fluorovinyl-based major resins with amino resin-based resins, block isocyanate and other cross-linking agents, and vinylidene fluoride-acrylic based resins. A general pigment such as titanium oxide or carbon black is blended. In the present invention, the elongation is 30% by the above formula.
% Or more, hardness is H or more, bending is 1T to 4T (T: radius of curvature of original plate thickness), wear resistance is 100 kg with a load of 20 kg.
9 ~ 30 thickness with paint prepared to have properties more than one time
Apply with μm.
【００１１】伸び率の３０％以上はシャッター形状に加
工する際に塗装膜の亀裂を防止して耐食性、耐水性を維
持するに必要な性質であるが、３０％未満の伸び率では
材質的に脆く軽度の加工で塗装膜が破断し耐食性などを
劣化する問題がある。硬度は塗装膜に耐摩耗性を付与す
る必要な性質で、Ｈ以上の硬さの鉛筆で擦っても傷の付
かない塗料を使用する。また屈曲性は曲げや衝撃を繰り
返しても塗装膜が剥離することなく安定した耐食性など
を得るに必要な性質であって、試験片に同じ板厚の鋼板
を挟み込んで１８０度折曲げて亀裂を生じない鋼板の枚
数つまり１Ｔ〜４Ｔ（Ｔ：原板厚みの曲率半径）で評価
される。４Ｔを越える軽度の折曲加工で亀裂する塗料の
塗装膜は、密着性がなく容易に剥離し、本発明が目的の
塗装鋼板を提供することができない。The elongation of 30% or more is a property required to prevent cracks of the coating film and maintain the corrosion resistance and water resistance during processing into a shutter shape. There is a problem that the coating film breaks due to brittle and light processing and the corrosion resistance and the like deteriorate. The hardness is a property required to impart abrasion resistance to a coating film, and a paint that is not scratched even when rubbed with a pencil having a hardness of H or more is used. Flexibility is a property required to obtain stable corrosion resistance without peeling of the coating film even after repeated bending and impact, and a steel plate of the same thickness is sandwiched between test pieces and bent 180 degrees to crack. The number of steel plates that do not occur, that is, 1T to 4T (T: radius of curvature of original plate thickness) is evaluated. A coating film of a paint that cracks by a slight bending process exceeding 4T has no adhesiveness and is easily peeled off, and the present invention cannot provide the intended coated steel sheet.
【００１２】耐摩耗性はシャッター用部材において塗装
外観性や耐候性などを長期間保持する上で重要な性質
で、荷重２０ｋｇで往復１００回以上擦っても塗装膜に
傷が付かない塗料を使用する事が必要である。さらにま
た、このような性質の塗料による上塗塗装膜の厚さは、
塗装鋼板に要求される各特性から９〜３０μｍで塗装す
る必要がある。すなわち、塗装膜の厚さが９μｍ未満の
薄い層では塗装外観性、耐候性、耐水性が劣り、３０μ
ｍ以上では加工時の亀裂を生じやすく適切ではない。Abrasion resistance is an important property for maintaining the coating appearance and weather resistance of shutter members for a long period of time. Use a paint that will not scratch the coating film even if it is rubbed 100 times back and forth with a load of 20 kg. It is necessary to do. Furthermore, the thickness of the overcoat film formed by the paint having such a property is
It is necessary to coat 9 to 30 μm in view of the characteristics required for the coated steel sheet. That is, in a thin layer having a thickness of less than 9 μm, the coating appearance, weather resistance and water resistance are inferior,
If it is more than m, cracks are likely to occur during processing, which is not suitable.
【００１３】上記のような構造の本発明の塗装鋼板は、
Ｚｎメッキを施して化成処理した溶融亜鉛メッキ鋼板ま
たは合金化溶融亜鉛メッキ鋼板の片面または両面にプラ
イマー塗装後さらには上塗塗装した後、あるいは裏面の
み専用の裏面塗料を塗装後、被塗物温度１８０℃〜２５
０℃の乾燥炉内で３０秒〜２分の加熱時間で焼付硬化処
理して製造される。専用の裏面塗料は用途や使用環境に
より加工性、耐食性等の塗膜性能を設定するが、表面の
上塗塗膜の耐摩耗性を阻害するものであってはならな
い。しかして製造された本発明のプレコート塗装鋼板
は、メッキ鋼板との密着性が優れ、耐摩耗性や光沢さら
には屈曲性など優れた性質を有するため重量シャッター
用鋼板として使用する事ができる。The coated steel sheet of the present invention having the above structure is
A hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet which has been subjected to a chemical conversion treatment by applying a Zn plating, is coated with a primer on one or both surfaces of the galvanized steel sheet, or after top-coating, or after coating a back-side coating only for the back side, and the coating temperature is 180. ℃ ~ 25
It is manufactured by baking and curing in a drying oven at 0 ° C. for a heating time of 30 seconds to 2 minutes. The special back coating paint sets the coating performance such as processability and corrosion resistance depending on the application and use environment, but it should not interfere with the abrasion resistance of the top coating on the surface. The precoated coated steel sheet of the present invention produced in this manner has excellent adhesion to a plated steel sheet and has excellent properties such as abrasion resistance, gloss, and flexibility, so it can be used as a steel sheet for heavy shutters.
【００１４】[0014]
【実施例】次に、本発明の実施例について説明する。表
１及び表２に示す各内容にてプライマーおよび上塗塗装
を施し重量シャッター形状に成形した。その時の屈曲試
験、ロールフォーミング試験、耐食性、光沢など試験結
果を表１及び表２に示す。EXAMPLES Next, examples of the present invention will be described. A primer and a top coat were applied according to the respective contents shown in Table 1 and Table 2 to form a heavy shutter shape. Tables 1 and 2 show test results such as bending test, roll forming test, corrosion resistance, and gloss.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】尚各試験方法、測定方法は次の通りであ
る。 １．鉛筆硬度 ＪＩＳ−Ｋ−５４００ ８．４に
よる。三菱鉛筆ユニで引っかき、Ｈ以上で塗膜の破れな
いものを合格とした。 ２．屈曲試験 試験片と同厚板の鋼板をはさみ万
力で１８０度折曲げ、クラックのない枚数で表示。（は
さまれた板の枚数が２枚の場合は２Ｔと表示。）１Ｔ〜
４Ｔを合格とした。The test methods and measurement methods are as follows. 1. Pencil hardness According to JIS-K-5400 8.4. Scratch with Mitsubishi Pencil Uni, and the one that the coating film did not break when H or higher was passed. 2. Bending test A steel plate of the same thickness as the test piece is sandwiched and bent 180 degrees with a vise, and the number is displayed without cracks. (If the number of sandwiched plates is 2, it is displayed as 2T.) 1T ~
4T was passed.
【００１８】３．耐摩耗性試験 幅６０ｍｍの試験片の
裏面を外側にし、内Ｒ１０ｍｍφにて１８０度折り曲
げ、その曲げ部分に２０ｋｇの荷重をかけ表面の同一場
所を往復で１００回以上こすり（こすり幅２５ｍｍ、１
往復は５０秒）表面の傷つきを観察し傷つきのないもの
を合格とした。 ４．密着試験 ゴバン目（１ｍｍ2 の区画を１０
０個）描き６ｍｍエリクセン押し出し後セロテープで剥
離試験を行い１００個残存を合格とした。3. Abrasion resistance test A test piece with a width of 60 mm is placed on the outside with the back side bent by 180 ° at R10 mmφ, and a load of 20 kg is applied to the bent portion, and the same location on the surface is rubbed back and forth 100 times or more (rubbing width 25 mm, 1
(Reciprocation is 50 seconds) The surface scratches were observed and those without scratches were accepted. 4. Adhesion test Gobang eyes (1 mm 2 section 10
After drawing 6 mm Erichsen, a peeling test was performed with cellophane tape, and 100 pieces remained as pass.
【００１９】５．ロールフォーミング試験 ロールフォーミング成形により塗膜の剥離等異常が認め
られないものを合格とする。 ６．塩水噴霧試験 ＪＩＳ−Ｚ−２３７１による。試
験片の４周辺をシーリングした試験片を１０００時間塩
水噴霧試験を実施後、塗膜表面に異常が認められないも
のを合格とした。5. Roll forming test Passes if no abnormalities such as peeling of the coating film are found by roll forming molding. 6. Salt spray test According to JIS-Z-2371. After performing a salt spray test for 1000 hours on a test piece obtained by sealing the periphery of 4 of the test piece, a test piece in which no abnormality was observed on the coating film surface was regarded as passing.
【００２０】７．硫酸浸漬試験 ２０℃下の５ｗｔ％硫
酸に４周辺をシーリングした試験片を５０時間浸漬後取
り出し、塗膜に異常が認められないものを合格とした。 ８．光沢 ＪＩＳ−Ｋ−５４００ ７．７．
６による。６０℃鏡面反射率で測定、 光沢値で表示す
る。7. Sulfuric Acid Immersion Test A test piece obtained by sealing 4 peripheral parts in 5 wt% sulfuric acid at 20 ° C. was immersed for 50 hours and then taken out. 8. Gloss JIS-K-5400 7.7.
According to 6. Measured at 60 ° C specular reflectance and displayed as gloss value.
【００２１】[0021]
【発明の効果】上記の実施例から明らかなように本発明
のプレコート鋼板はいずれの試験においても合格し屈曲
性、耐摩耗性、ロールフォーミング試験において優れて
いる。As is clear from the above examples, the precoated steel sheet of the present invention passes all tests and is excellent in flexibility, abrasion resistance and roll forming test.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ３２Ｂ 15/08 Ｇ Ｃ２３Ｃ 2/06 Ｅ０６Ｂ 9/15 (72)発明者 広津 貞征 東京都千代田区大手町２−６−３ 新日本 製鐵株式会社内 (72)発明者 城戸 勝正 福岡県北九州市若松区大字安瀬１番地 東 海鋼業株式会社内 (72)発明者 松井 岩根 福岡県北九州市若松区大字安瀬１番地 東 海鋼業株式会社内 (72)発明者 中山 久 福岡県北九州市若松区大字安瀬１番地 東 海鋼業株式会社内 (72)発明者 光田 敬治 兵庫県尼崎市塚口本町２丁目41番１号 川 上塗料株式会社内 (72)発明者 小原 利通 兵庫県尼崎市塚口本町２丁目41番１号 川 上塗料株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical display location B32B 15/08 G C23C 2/06 E06B 9/15 (72) Inventor Sadayuki Hirotsu Chiyoda-ku, Tokyo 2-6-3 Otemachi Nippon Steel Co., Ltd. (72) Inventor Katsumasa Kido No. 1 Anze, Wakamatsu-ku, Kitakyushu-ku, Fukuoka Prefecture Tokai Steel Industry Co., Ltd. (72) Inventor Matsui Iwane Wakamatsu, Kitakyushu-shi, Fukuoka Prefecture Ward, 1st Anse, Tokai Steel Co., Ltd. (72) Inventor Hisa Nakayama Wakamatsu, Kitakyushu, Fukuoka Prefecture 1st, Asase Tokai Steel Co., Ltd. (72) Inventor Keiji Mitsuda 2 Tsukaguchi Honcho, Amagasaki, Hyogo 41-1-1 Kawakami Paint Co., Ltd. (72) Inventor Toshimichi Ohara 2-41-11 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Kawakami Paint Co., Ltd.
Claims (1)
量が９０〜３００ｇ／ｍ2 のＺｎメッキを施して化成処
理した溶融亜鉛メッキ鋼板または合金化溶融亜鉛メッキ
鋼板の片面または両面に、伸び率：２０％以上で厚さ３
〜１０μｍのプライマー塗装を施し、その上に伸び率：
３０％以上、硬度：Ｈ以上、屈曲：１Ｔ〜４Ｔ（Ｔ：原
板厚みの曲率半径），耐摩耗性：荷重２０ｋｇで往復１
００回以上擦っても加傷されない特性をもつ塗料で厚さ
９〜３０μｍの上塗塗装を施した事を特徴とする重量シ
ャッター用プレコート塗装鋼板。1. A hot-dip galvanized steel sheet or a galvannealed galvanized steel sheet obtained by subjecting a steel sheet having a thickness of 1.2 to 2.3 mm to Zn plating having a basis weight of 90 to 300 g / m 2 for chemical conversion treatment. And elongation: 20% or more and thickness 3
Applying 10μm primer coating, and elongation:
30% or more, hardness: H or more, bending: 1T to 4T (T: radius of curvature of original plate thickness), wear resistance: reciprocating 1 at a load of 20 kg
A pre-coated steel sheet for heavy-duty shutters, characterized in that a 9-30 μm-thick top coat is applied with a paint that is not scratched even more than 00 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27518293A JP3202449B2 (en) | 1993-11-04 | 1993-11-04 | Pre-coated steel sheet for heavy shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27518293A JP3202449B2 (en) | 1993-11-04 | 1993-11-04 | Pre-coated steel sheet for heavy shutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07126826A true JPH07126826A (en) | 1995-05-16 |
| JP3202449B2 JP3202449B2 (en) | 2001-08-27 |
Family
ID=17551824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27518293A Expired - Fee Related JP3202449B2 (en) | 1993-11-04 | 1993-11-04 | Pre-coated steel sheet for heavy shutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3202449B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003277903A (en) * | 2002-03-20 | 2003-10-02 | Nisshin Steel Co Ltd | Precoated galvanized steel sheet having excellent workability and corrosion resistance of worked portion |
| JP2008132496A (en) * | 2008-02-08 | 2008-06-12 | Shikoku Res Inst Inc | Method of painting old painted film for repair |
| JP2018108658A (en) * | 2016-12-28 | 2018-07-12 | 株式会社ハウステック | Decorative metal plate and bath room unit |
-
1993
- 1993-11-04 JP JP27518293A patent/JP3202449B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003277903A (en) * | 2002-03-20 | 2003-10-02 | Nisshin Steel Co Ltd | Precoated galvanized steel sheet having excellent workability and corrosion resistance of worked portion |
| JP2008132496A (en) * | 2008-02-08 | 2008-06-12 | Shikoku Res Inst Inc | Method of painting old painted film for repair |
| JP2018108658A (en) * | 2016-12-28 | 2018-07-12 | 株式会社ハウステック | Decorative metal plate and bath room unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3202449B2 (en) | 2001-08-27 |
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