JP3836273B2 - Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance - Google Patents
Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance Download PDFInfo
- Publication number
- JP3836273B2 JP3836273B2 JP15346799A JP15346799A JP3836273B2 JP 3836273 B2 JP3836273 B2 JP 3836273B2 JP 15346799 A JP15346799 A JP 15346799A JP 15346799 A JP15346799 A JP 15346799A JP 3836273 B2 JP3836273 B2 JP 3836273B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- treated metal
- weight
- zinc
- producing
- 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.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Landscapes
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法に関する。より詳細には、家電製品のシャーシや複写機等に使用される表面処理金属板の製造方法に関する。
【０００２】
【従来の技術】
複写機等に使用される表面処理金属板として、金属板に亜鉛めっき層、亜鉛合金めっき層、亜鉛めっきあるいは着色亜鉛めっき層を形成させ、その上層にクロム酸化物、水和酸化物、およびシリカからなる表面処理層を設けた表面処理金属板、またはこの表面処理層のさらに上層にシリカを添加した表面処理層を設けた表面処理金属板が開示されており(特開平８−２７７４９８号公報参照)、この表面処理鋼板は、コピー用紙が表面処理層を擦過する際の耐庇付き性や耐摩耗性に優れていることが記載されている。しかし、家電製品のシャーシや複写機などの用途においては、家電製品を取り扱う際や複写機などのコピー作業等の際に手指が頻繁に表面に接触するため、手指が触れた部分が変色したり、汗の塩分によって金属板に錆が発生することがあり、さらには折り曲げ、絞りやしごき加工により表面処理層がダメージをうけ、加工性に劣る場合があり、上記の耐疵付き性や耐摩耗性に優れた表面処理金属板を用いても、変色や錆の発生を防止し、十分な加工をすることは困難であった。また、表面処理鋼板上における紙の滑り性が必ずしも十分ではなく、複写作業時の紙詰まりなどのトラブルを完全に回避することが困難であった。
【０００３】
【発明が解決しようとする課題】
本発明は、耐食性を向上させ、またコピー用紙の出し入れ時におけるコピー用紙の擦過等による表面処理皮膜の擦り疵および摩耗を軽減させるとともに、滑り性を向上させ、かつ手指が接触した際の汗による変色や錆の発生を著しく軽減させ、さらには折り曲げ、絞りやしごき加工も可能な加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法を提供することを課題とする。
【０００４】
【課題を解決するための手段】
請求項１に記載の加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法は、
表面処理金属板を、１０〜５５重量％のシリカ、３〜２０重量％の潤滑剤、０.０５〜１重量％のシランカップリング剤、０．１〜２重量％クロム酸又はクロム酸塩、及び残部下記の水溶性ウレタン樹脂を含む水溶液中に浸漬した後、乾燥して０．１〜５μｍの有機樹脂層を形成させることを特徴とする。
ウレタン樹脂単体
鉛筆硬度：Ｈ〜６Ｈ
引張強度：３３０〜５９０kg/cm２、
伸び：１８０〜４５０％
請求項２に記載の加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法は、請求項１において、前記潤滑剤が、ポリテトラフルオロエチレンおよびポリエチレンワックスの少なくとも一方、あるいは両方であることを特徴とする。
請求項３に記載の加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法は、請求項１又は２において、前記表面処理金属板が、鋼板表面に、亜鉛、コバルト、モリブデン、錫、ニッケルのいずれかの単層めっき、または、亜鉛−コバルト、亜鉛−ニッケル、亜鉛−コバルト−モリブデンのいずれかの合金めっきを施したもの、あるいは、さらにその上層にクロム水和酸化物皮膜を形成させたものであることを特徴とする。
【０００５】
【発明の実施の形態】
本発明においては、金属板の少なくとも片面に、１０〜５５重量％のシリカ、３〜２０重量％の潤滑剤および ０.０５〜１重量％のシランカップリング剤を含む、樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％のウレタン系樹脂からなる有機樹脂層を設けることにより、耐食性を向上させ、また、複写機等においてコピー用紙の出し入れ時におけるコピー用紙の擦過による表面処理皮膜の擦り疵および摩耗を軽減させるとともに、滑り性を向上させ、かつ手指が接触した際の汗による変色や錆の発生を著しく軽減させるとともに、さらには折り曲げ、絞りやしごき加工も可能な加工性、耐疵付き性および耐食性に優れる表面処理金属板が得られる。以下、本発明を詳細に説明する。
【０００６】
まず、本発明の表面処理金属板に用いられる基体金属板としては、銅板、銅合金板、アルミニウム板、アルミニウム合金板、ステンレス鋼板などの他に、スケールを除去した熱延鋼板、または冷延鋼板に、亜鉛、コバルト、モリブデン、錫、ニッケルのいずれか１種の単層めっき、または２種以上からなる亜鉛−コバルト、亜鉛−ニッケル、亜鉛−ニッケル−コバルト、亜鉛−コバルト−モリブデン、亜鉛−ニッケル−コバルト−モリブデン、ニッケル−錫などの複層めっき、合金めっきあるいは複合めっきを施した鋼板、またはさらにその上層にクロム水和酸化物皮膜を形成させた鋼板が適用可能である。また、陽極処理、陰極処理、または酸化剤を主成分とする浴中への浸漬処理等により、めっき層を着色した着色めっき鋼板も同様に適用可能である。
【０００７】
次に、上記の基体金属板上に１０〜５５重量％のシリカ、３〜２０重量％の潤滑剤および ０.０５〜１重量％のシランカップリング剤を含む、樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％のウレタン系樹脂からなる有機樹脂層を設けることが、本発明の目的とする折り曲げ、絞りやしごき加工も可能な加工性に加えて、耐疵付き性および耐食性に優れた表面処理金属板を得る上で極めて重要である。有機樹脂層中に硬質のシリカを含有させることにより、層全体の硬度が高まり、耐疵付き性、および耐摩耗性が向上する。また有機樹脂層中に滑り性に富む潤滑剤粉末を含有させることにより、層表面の摩擦係数が減少し、紙等との滑り性が向上し、また耐摩耗性もさらに向上する。さらに、有機樹脂層中にシランカップリング剤を含有させることにより、耐食性が向上するとともに、また塗膜密着性が向上する。さらにまた、上記の有機樹脂層にシリカ、潤滑剤およびシランカップリング剤に加えてクロム酸あるいはクロム酸塩類を含有させることが、より耐食性を向上させる。有機樹脂層を構成する樹脂としては、環境保全の観点からは有機溶媒系樹脂よりも水に溶解または分散可能な水性樹脂が好ましく、耐疵付き性および耐食性に加えて、折り曲げ、絞りやしごき加工も可能な望ましい加工性を達成するには、樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％のウレタン系樹脂が適当である。鉛筆硬度がＨよりも低いＦやＨＢになると、樹脂が柔らかいために耐疵付き性や耐摩耗性に劣る。６Ｈよりも高い７〜９Ｈになると加工性に劣る。引張強度が３３０kg/cm２未満、伸びが１８０％未満では加工性に劣り、引張強度が５９０kg/cm２および伸びが４５０％越えると効果が飽和するとともに樹脂が高価になり経済的でなくなる。
【０００８】
上述したように、有機樹脂は水性であることが好ましく、水性樹脂を用いて有機樹脂層中にシリカを含有させるためには、水性樹脂を溶解した水溶液中に水性のコロイダルシリカを分散させたものを基体金属板上に塗布し乾燥する等によって適用することができる。有機樹脂層中に含有させる硬質粉末も特に限定するものではないが、上記のように水溶液に分散可能であること、安価であること、および透明な皮膜が得られ、有機樹脂層を通して基体金属板の色を識別可能にし得るシリカは特に好ましいものである。
【０００９】
有機樹脂中に含有させる潤滑剤としては、上記の水性樹脂を溶解した水溶液中に分散可能なものが好ましく、例えばポリテトラフルオロエチレン、ポリエチレンワックス等が適用可能である。また、着色した表面処理皮膜を形成させる場合、二硫化モリブデン、グラファイト、ボロンナイトライドなどの有色の無機系潤滑剤の粉末も適用可能である。しかし、これらの無機系潤滑剤粉末は水溶液中に分散し難いので、有機溶媒系樹脂を用いる必要がある。
【００１０】
有機樹脂層を基体金属板上に形成させる方法としては、フィルムラミネート、押出しラミネートなどのラミネート法、粉体塗装法、ロールコート法、スプレー法、静電塗装法等、公知の塗装方法が適用可能であるが、有機樹脂層の厚さは比較的薄くてよいこと、塗装作業の簡便さ、および経済性の観点から、樹脂を溶解した溶液中に基体金属板を浸漬し、絞りロール等を用いて余分の樹脂溶液を除去した後、乾燥させる方法を採用することが好ましい。乾燥方法は熱風乾燥、ガスオーブン、電気オーブン、誘導加熱炉等、いずれの手段を用いてもよく、処理量と経済性の観点から最も有利な方法を採用すればよい。また、塗装皮膜が生成した後、ＵＶ照射や電子線照射を併用してもよい。
【００１１】
有機樹脂層の皮膜組成としては、シリカ：１０〜５５重量％、潤滑剤：３〜２０重量％、残部が有機樹脂からなる組成とすることが好ましい。シリカが１０重量％未満および潤滑剤が３重量％未満では十分な耐疵付き性、耐摩耗性、および良好な滑り性が得られず、一方シリカが５５重量％を越えると表面処理皮膜の加工性が乏しくなり、得られた表面処理金属板に折り曲げ等の加工を施すと、表面処理皮膜に亀裂を生ずるようになる。また、潤滑剤の含有量を増やすと塗油量の少ない条件下や無塗油での加工も可能となるが、２０重量％を越えて含有しても、特性の向上効果が飽和してしまい、かつ経済的でなくなる。
なお、耐食性向上を目的として無水クロム酸や重クロム酸ナトリウムやクロム酸アンモニウム等のクロム酸塩類を、効果が認められる ０.１重量％以上添加してもかまわないが、添加量が多い場合には処理液がゲル化し、皮膜形成が困難になる場合もあるので、２重量％以下が好ましい。
また、塗膜密着性および耐食性向上を目的として、シランカップリング剤を上層の有機樹脂層中に効果が認められる ０.１重量％以上添加してもかまわないが、添加量が多い場合には処理液がゲル化し、皮膜形成が困難になる場合もあるので、１重量％未満が好ましい。
【００１２】
有機樹脂層の厚さは ０.１〜５μｍである。乾燥重量に換算した場合、含有させるシリカ、潤滑剤およびシランカップリング剤の種類と量により比重が異なるため、およそ ０.１〜５ｇ／ｍ２である。０.１μｍ未満では十分な耐疵付き性、耐摩耗性、耐食性および良好な滑り性、加工性が得られない。５μｍを越えると効果が飽和し、経済的でなくなる。なお、通電性が合わせて要求される場合には、有機樹脂層の厚さは薄い方が好ましく、１μｍ以下が適当である。
上記のようにして、基体金属板上に１０〜５５重量％のシリカ、３〜２０重量％の潤滑剤および ０.０５〜１重量％のシランカップリング剤を含む、樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％のウレタン系樹脂からなる有機樹脂層を設けてなる、折り曲げ、絞りやしごき加工も可能な加工性に加えて、耐疵付き性および耐食性に優れた表面処理金属板が得られる。
【００１３】
【実施例】
以下、実施例にて本発明をさらに詳細に説明する。
焼鈍および調質圧延を施した冷延鋼板 （厚さ：０.５０ｍｍ）をめっき原板とし、アルカリ溶液中で陰極電解脱脂し、硫酸中で酸洗した後、表１に示す単一めっき、合金めっきあるいは複合めっきを施した。めっき付着量は２０ｇ／ｍ２ とした。次いでクロメート処理し、めっき上に全クロム量として３０ｍｇ／ｍ２のクロム水和酸化物皮膜を形成させた。一部の試料についてはクロメート処理を行わなかった。
【００１４】
次いで、表１に示す組成のシリカ、潤滑剤およびシランカップリング剤を含む樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％の水性のウレタン系樹脂溶液中にこれらのめっき鋼板を浸漬し、絞りロールを用いて余分の樹脂溶液を除去した後、熱風乾燥し、表１に示す厚さの有機樹脂層を形成させた。一部の試料については、クロム酸を有機樹脂中に添加した。
なお、樹脂単体の引張強度および伸びの値は、幅１０ｍｍ、厚さ１ｍｍ、長さ１００ｍｍの樹脂単体の試験片を作製し、引張試験により評価した。
【００１５】
【表１】
このようにして得られた、シリカ、潤滑剤およびシランカップリング剤を含む有機樹脂層を設けてなる表面処理鋼板を、以下に示す項目について特性を評価した。
１）耐汗跡性
ＪＩＳ−Ｋ２２４６に基づいて人工汗を作成し、これを試料の表面処理鋼板上に滴下し、3分間静置した後拭き取り、滴下部分の変色の程度を目視評価した。
２）耐汗跡錆性
ＪＩＳ−Ｋ２２４６に基づく人工汗を試料の表面処理鋼板上に塗布し乾燥させ、次いで６０℃、９５％の恒温恒湿雰囲気中に９６時間放置した後、錆の発生程度を目視評価した。
３）耐疵付き性
試料の表面処理鋼板上にコピー用紙（７０ｇ／ｍ２） を載せ、上から４００ｇｆの荷重を載荷した状態で２０００回のラビングを実施し、表面に発生した疵の程度を目視評価した。
４）加工性Ａ
試料の表面処理面が外側にくるように、半径１ｍｍで１８０度折り曲げ、折り曲げ部に生じた亀裂の発生程度を目視評価した。
５）加工性Ｂ
絞り比 ２.２で山田式カップ深絞り成形を行い、カップ側面の疵付き性を目視評価した。
６）耐食性
ＪＩＳ−Ｚ２３７１に基づいて７２時間の塩水噴霧試験を実施し、錆の発生程度を目視評価した。
７）密着性
日本ペイント製ＳＰ−Ｆ５０エナメル塗料を、膜厚５μｍになるようにバーコーターにて塗布した後、１６０℃で２０分間焼き付けを行った後、２ｍｍの碁盤目テープ剥離試験を行い、塗膜残存程度を目視評価した。
各特性の評価は１（劣）〜５（優）の５段階で評価した。評価結果を表２に示す。
【００１７】
【表２】
表２に示すように、比較例では評価点３以下の特性が認められるのに対して、本発明の表面処理金属板は、加工性、耐疵付き性に加えて、耐汗性、耐汗跡錆性、耐食性および密着性のいずれにおいても優れている。
【００１９】
【発明の効果】
本発明は表面処理金属坂上に、１０〜５５重量％のシリカ、３〜２０重量％の潤滑剤および ０.０５〜１重量％のシランカップリング剤を含む、樹脂単体の鉛筆硬度がＨ〜６Ｈの硬さを有し、引張強度が３３０〜５９０kg/cm２、伸びが１８０〜４５０％のウレタン系樹脂からなる有機樹脂層を設けてなる加工性、耐疵付き性および耐食性に優れた表面処理金属板、およびその製造方法であり、本発明の表面処理金属板を複写機等に適用した場合、コピー用紙の出し入れ時におけるコピー用紙の擦過による表面処理皮膜の擦り疵および摩耗が軽減するとともに、滑り性を向上させ、かつ手指が接触した際の汗による変色や錆の発生を著しく軽減させるとともに、さらには折り曲げ、絞りやしごき加工を受ける家電製品のシャーシ等に適用した場合、無塗油あるいは塗油量の少ない条件下でも、疵や割れが発生すること無く加工が可能である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance. More specifically, the present invention relates to a method of manufacturing a surface-treated metal plate used for a home appliance chassis or a copying machine.
[0002]
[Prior art]
As a surface-treated metal plate used for copying machines, etc., a galvanized layer, zinc alloy plated layer, galvanized or colored galvanized layer is formed on the metal plate, and chromium oxide, hydrated oxide, and silica are formed on the upper layer. There is disclosed a surface-treated metal plate provided with a surface-treated layer comprising or a surface-treated metal plate provided with a surface-treated layer in which silica is further added to the surface-treated layer (see JP-A-8-277498). It is described that this surface-treated steel sheet is excellent in scratch resistance and abrasion resistance when the copy paper scrapes the surface-treated layer. However, in applications such as home appliance chassis and photocopiers, the fingers frequently come into contact with the surface when handling home appliances or copying work with photocopiers, etc. In addition, rust may occur on the metal plate due to the salt content of sweat, and the surface treatment layer may be damaged by bending, drawing or ironing, resulting in inferior workability. Even if a surface-treated metal plate having excellent properties is used, it is difficult to prevent discoloration and rust and to perform sufficient processing. Further, the slipperiness of the paper on the surface-treated steel sheet is not always sufficient, and it has been difficult to completely avoid troubles such as paper jams during copying.
[0003]
[Problems to be solved by the invention]
The present invention improves the corrosion resistance, reduces the scratches and abrasion of the surface-treated film caused by scratching of the copy paper when the copy paper is put in and out, improves the slipperiness, and causes sweating when the fingers touch. It is an object of the present invention to provide a method for producing a surface-treated metal sheet that significantly reduces discoloration and rusting, and is excellent in workability, scratch resistance and corrosion resistance that can be bent, drawn and ironed.
[0004]
[Means for Solving the Problems]
The method for producing a surface-treated metal plate having excellent workability, scratch resistance and corrosion resistance according to claim 1,
10 to 55 wt% silica, 3 to 20 wt% lubricant, 0.05 to 1 wt% silane coupling agent, 0.1 to 2 wt% chromic acid or chromate, And after being immersed in an aqueous solution containing the following water-soluble urethane resin, the organic resin layer having a thickness of 0.1 to 5 μm is formed by drying.
Urethane resin simple substance Pencil hardness: H-6H
Tensile strength: 330 to 590 kg / cm 2
Elongation: 180-450%
The method for producing a surface-treated metal sheet having excellent workability, scratch resistance and corrosion resistance according to claim 2 is the method according to claim 1, wherein the lubricant is at least one of polytetrafluoroethylene and polyethylene wax, or both. It is characterized by being.
The method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance according to claim 3 is the method according to claim 1 or 2, wherein the surface-treated metal plate has zinc, cobalt, molybdenum on the steel plate surface. , Tin, nickel single layer plating, or zinc-cobalt, zinc-nickel, zinc-cobalt-molybdenum alloy plating, or chromium hydrated oxide film on the upper layer It is characterized by being formed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the pencil hardness of a single resin containing 10 to 55% by weight of silica, 3 to 20% by weight of a lubricant and 0.05 to 1% by weight of a silane coupling agent is provided on at least one surface of the metal plate. Corrosion resistance is improved by providing an organic resin layer made of a urethane-based resin having a hardness of H to 6H, a tensile strength of 330 to 590 kg / cm 2 , and an elongation of 180 to 450%. In addition to reducing the scratches and abrasion of the surface treatment film caused by scratching of the copy paper during loading and unloading of the copy paper, it also improves the slipperiness and significantly reduces discoloration and rust caused by sweat when the fingers touch. Furthermore, a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance that can be bent, drawn and ironed can be obtained. Hereinafter, the present invention will be described in detail.
[0006]
First, as a base metal plate used for the surface-treated metal plate of the present invention, in addition to a copper plate, a copper alloy plate, an aluminum plate, an aluminum alloy plate, a stainless steel plate, etc., a hot-rolled steel plate from which scale has been removed, or a cold-rolled steel plate And zinc-cobalt, zinc-nickel, zinc-nickel-cobalt, zinc-cobalt-molybdenum, and zinc-nickel. -A steel plate to which a multilayer plating such as cobalt-molybdenum or nickel-tin, an alloy plating or a composite plating is applied, or a steel plate having a chromium hydrated oxide film formed thereon is applicable. Further, a colored plated steel sheet in which the plating layer is colored by an anodic treatment, a cathodic treatment, or an immersion treatment in a bath containing an oxidant as a main component is also applicable.
[0007]
Next, the pencil hardness of a single resin containing 10 to 55% by weight of silica, 3 to 20% by weight of a lubricant and 0.05 to 1% by weight of a silane coupling agent on the base metal plate has a hardness of H to Folding, drawing and ironing processing intended by the present invention is to provide an organic resin layer made of urethane resin having a hardness of 6H, a tensile strength of 330 to 590 kg / cm 2 , and an elongation of 180 to 450%. In addition to possible workability, it is extremely important for obtaining a surface-treated metal sheet having excellent scratch resistance and corrosion resistance. By including hard silica in the organic resin layer, the hardness of the entire layer is increased, and the scratch resistance and wear resistance are improved. Further, by containing a lubricant powder rich in slipperiness in the organic resin layer, the friction coefficient of the layer surface is reduced, slipperiness with paper or the like is improved, and wear resistance is further improved. Furthermore, by including a silane coupling agent in the organic resin layer, corrosion resistance is improved and coating film adhesion is improved. Furthermore, adding chromic acid or chromates in addition to silica, lubricant and silane coupling agent to the organic resin layer further improves the corrosion resistance. As the resin constituting the organic resin layer, an aqueous resin that can be dissolved or dispersed in water is more preferable than an organic solvent-based resin from the viewpoint of environmental conservation, and in addition to wrinkle resistance and corrosion resistance, bending, drawing, and ironing are performed. In order to achieve the desired workability, a urethane resin having a pencil hardness of H to 6H, a tensile strength of 330 to 590 kg / cm 2 , and an elongation of 180 to 450% is suitable. It is. When the F or HB has a pencil hardness lower than H, the resin is soft, so that the scratch resistance and the wear resistance are inferior. When it becomes 7-9H higher than 6H, it is inferior to workability. When the tensile strength is less than 330 kg / cm 2 and the elongation is less than 180%, the workability is poor. When the tensile strength is 590 kg / cm 2 and the elongation exceeds 450%, the effect becomes saturated and the resin becomes expensive and not economical.
[0008]
As described above, the organic resin is preferably aqueous, and in order to contain silica in the organic resin layer using the aqueous resin, aqueous colloidal silica is dispersed in an aqueous solution in which the aqueous resin is dissolved. Can be applied to the base metal plate and dried. The hard powder to be contained in the organic resin layer is not particularly limited, but it can be dispersed in an aqueous solution as described above, is inexpensive, and a transparent film is obtained. Silica, which can make the color of each of them distinguishable, is particularly preferred.
[0009]
The lubricant contained in the organic resin is preferably one that can be dispersed in an aqueous solution in which the above aqueous resin is dissolved. For example, polytetrafluoroethylene, polyethylene wax, or the like is applicable. Moreover, when forming a colored surface treatment film, colored inorganic lubricant powders such as molybdenum disulfide, graphite, boron nitride, etc. can be applied. However, since these inorganic lubricant powders are difficult to disperse in an aqueous solution, it is necessary to use an organic solvent resin.
[0010]
As a method for forming the organic resin layer on the base metal plate, a known coating method such as a laminating method such as film laminating or extrusion laminating, a powder coating method, a roll coating method, a spray method or an electrostatic coating method can be applied. However, the organic resin layer may be relatively thin, and the base metal plate is immersed in a solution in which the resin is dissolved from the viewpoint of ease of painting and economy, and a squeeze roll or the like is used. It is preferable to employ a method of drying after removing the excess resin solution. As a drying method, any means such as hot air drying, gas oven, electric oven, induction heating furnace, etc. may be used, and the most advantageous method may be adopted from the viewpoint of throughput and economy. Further, after the coating film is formed, UV irradiation or electron beam irradiation may be used in combination.
[0011]
As the film composition of the organic resin layer, silica: 10 to 55% by weight, lubricant: 3 to 20% by weight, and the balance is preferably composed of an organic resin. When the silica content is less than 10% by weight and the lubricant content is less than 3% by weight, sufficient scratch resistance, abrasion resistance and good slipperiness cannot be obtained, while when the silica content exceeds 55% by weight, the surface-treated film is processed. When the obtained surface-treated metal sheet is subjected to a process such as bending, the surface-treated film is cracked. In addition, increasing the lubricant content makes it possible to process under conditions where the amount of oil is small or without oil, but even if the content exceeds 20% by weight, the effect of improving the characteristics will be saturated. And not economical.
In order to improve the corrosion resistance, chromates such as chromic anhydride, sodium dichromate and ammonium chromate may be added in an amount of 0.1% by weight or more where the effect is recognized. Is preferably 2% by weight or less, since the treatment liquid may gel and film formation may be difficult.
In addition, for the purpose of improving coating film adhesion and corrosion resistance, a silane coupling agent may be added to the upper organic resin layer in an amount of 0.1% by weight or more. Since the treatment liquid may gel and film formation may be difficult, it is preferably less than 1% by weight.
[0012]
The thickness of the organic resin layer is 0.1 to 5 μm. When converted to dry weight, the specific gravity varies depending on the type and amount of silica, lubricant, and silane coupling agent to be contained, and therefore is about 0.1 to 5 g / m 2 . If the thickness is less than 0.1 μm, sufficient scratch resistance, abrasion resistance, corrosion resistance, good slipperiness and workability cannot be obtained. If it exceeds 5 μm, the effect is saturated and it is not economical. In addition, when electrical conductivity is requested | required collectively, the one where the thickness of the organic resin layer is thinner is preferable, and 1 micrometer or less is suitable.
As described above, the pencil hardness of a single resin containing 10 to 55% by weight of silica, 3 to 20% by weight of a lubricant and 0.05 to 1% by weight of a silane coupling agent on the base metal plate is H. has a hardness of ～6H, tensile strength 330~590kg / cm 2, elongation is provided an organic resin layer having a 180 to 450 percent of urethane resin, bending, squeezing and ironing a possible processability In addition, a surface-treated metal plate having excellent scratch resistance and corrosion resistance can be obtained.
[0013]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
Cold-rolled steel sheet (thickness: 0.50 mm) that has been annealed and temper-rolled is used as the plating base, and is subjected to cathodic electrolytic degreasing in an alkaline solution, pickling in sulfuric acid, and then the single plating and alloy shown in Table 1 Plating or composite plating was applied. The plating adhesion amount was 20 g / m 2 . Next, chromate treatment was performed to form a chromium hydrated oxide film having a total chromium content of 30 mg / m 2 on the plating. Some samples were not chromated.
[0014]
Next, the resin having a composition shown in Table 1 including silica, lubricant, and silane coupling agent has a pencil hardness of H to 6H, a tensile strength of 330 to 590 kg / cm 2 , and an elongation of 180 to 450. These plated steel sheets were immersed in an aqueous urethane-based resin solution of 10%, and the excess resin solution was removed using a squeeze roll, followed by hot air drying to form an organic resin layer having a thickness shown in Table 1. . For some samples, chromic acid was added into the organic resin.
The tensile strength and elongation of the single resin were evaluated by a tensile test by preparing a single resin test piece having a width of 10 mm, a thickness of 1 mm, and a length of 100 mm.
[0015]
[Table 1]
The properties of the surface-treated steel sheet provided with the organic resin layer containing silica, lubricant and silane coupling agent thus obtained were evaluated for the following items.
1) Anti-sweat resistance Artificial sweat was prepared based on JIS-K2246, dropped on the surface-treated steel sheet of the sample, left to stand for 3 minutes, wiped off, and the degree of discoloration of the dropped portion was visually evaluated.
2) Anti-sweat rust resistance Artificial sweat based on JIS-K2246 was applied on the surface-treated steel sheet of the sample, dried, and then allowed to stand in a constant temperature and humidity atmosphere of 60 ° C and 95% for 96 hours. Was visually evaluated.
3) Place copy paper (70 g / m 2 ) on the surface-treated steel sheet of the scratch resistant sample, rub it 2000 times with a load of 400 gf from the top, and measure the degree of wrinkles generated on the surface. Visual evaluation was made.
4) Workability A
The sample was bent 180 degrees with a radius of 1 mm so that the surface treated surface was on the outside, and the degree of occurrence of cracks in the bent portion was visually evaluated.
5) Workability B
Yamada cup deep drawing was performed at a drawing ratio of 2.2, and the wrinkling property of the cup side surface was visually evaluated.
6) Corrosion resistance Based on JIS-Z2371, a salt spray test for 72 hours was carried out, and the degree of rust generation was visually evaluated.
7) Adhesion SP-F50 enamel paint made by Nippon Paint was applied with a bar coater to a film thickness of 5 μm, then baked at 160 ° C. for 20 minutes, and then a 2 mm cross-cut tape peeling test was performed. The coating film remaining degree was visually evaluated.
Each characteristic was evaluated in five stages, 1 (poor) to 5 (excellent). The evaluation results are shown in Table 2.
[0017]
[Table 2]
As shown in Table 2, in the comparative example, a characteristic of evaluation score 3 or less is recognized, whereas the surface-treated metal sheet of the present invention has sweat resistance, sweat resistance in addition to workability and scratch resistance. It is excellent in any of rust resistance, corrosion resistance and adhesion.
[0019]
【The invention's effect】
In the present invention, the pencil hardness of a single resin containing 10 to 55% by weight of silica, 3 to 20% by weight of a lubricant and 0.05 to 1% by weight of a silane coupling agent is H to 6H on a surface-treated metal slope. Surface treatment excellent in workability, scratch resistance and corrosion resistance by providing an organic resin layer made of a urethane resin having a hardness of 330 to 590 kg / cm 2 and an elongation of 180 to 450% A metal plate, and a method for manufacturing the same, and when the surface-treated metal plate of the present invention is applied to a copying machine, etc. When it is applied to the chassis of household appliances that undergoes bending, squeezing and ironing, as well as improving slipperiness and significantly reducing the discoloration and rusting caused by sweat when the fingers touch. , Even under conditions less free oil coating or oiling amount, it is possible without processing to scratches and cracks are generated.
Claims (3)
１０〜５５重量％のシリカ、
３〜２０重量％の潤滑剤、
０.０５〜１重量％のシランカップリング剤、
０．１〜２重量％クロム酸又はクロム酸塩、
及び残部下記の水溶性ウレタン樹脂を含む水溶液中に浸漬した後、
乾燥して０．１〜５μｍの有機樹脂層を形成させることを特徴とする加工性、耐疵付き性および耐食性に優れた表面処理金属板の製造方法。
ウレタン樹脂単体
鉛筆硬度：Ｈ〜６Ｈ
引張強度：３３０〜５９０kg/cm２、
伸び：１８０〜４５０％Surface treatment metal plate,
10-55 wt% silica,
3-20% by weight of lubricant,
0.05 to 1% by weight of a silane coupling agent,
0.1 to 2% by weight chromic acid or chromate,
And after immersing in an aqueous solution containing the following water-soluble urethane resin,
A method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance, characterized by drying to form an organic resin layer having a thickness of 0.1 to 5 μm.
Urethane resin simple substance Pencil hardness: H-6H
Tensile strength: 330-590 kg / cm 2 ,
Elongation: 180-450%
あるいは、さらにその上層にクロム水和酸化物皮膜を形成させたものであることを特徴とする、請求項１又は２に記載の表面処理金属板の製造方法。The surface-treated metal plate has a single-layer plating of zinc, cobalt, molybdenum, tin, or nickel or an alloy plating of zinc-cobalt, zinc-nickel, or zinc-cobalt-molybdenum on the surface of the steel plate. What I gave,
Alternatively, the method for producing a surface-treated metal sheet according to claim 1, wherein a chromium hydrated oxide film is further formed on the upper layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15346799A JP3836273B2 (en) | 1998-06-02 | 1999-06-01 | Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16778998 | 1998-06-02 | ||
| JP10-167789 | 1998-06-02 | ||
| JP15346799A JP3836273B2 (en) | 1998-06-02 | 1999-06-01 | Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000052485A JP2000052485A (en) | 2000-02-22 |
| JP3836273B2 true JP3836273B2 (en) | 2006-10-25 |
Family
ID=26482080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15346799A Expired - Lifetime JP3836273B2 (en) | 1998-06-02 | 1999-06-01 | Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3836273B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3810742B2 (en) * | 2003-01-17 | 2006-08-16 | 東洋鋼鈑株式会社 | Post-treatment liquid for plated steel sheet, post-treated plated steel sheet using the same, and method for producing the same |
| JP3810743B2 (en) * | 2003-01-17 | 2006-08-16 | 東洋鋼鈑株式会社 | Post-treated plated steel sheet |
| JP4963527B2 (en) * | 2004-07-15 | 2012-06-27 | 東洋鋼鈑株式会社 | Magnesium alloy plate for forming, magnesium alloy container, and method for producing magnesium alloy container |
| WO2007040096A1 (en) * | 2005-10-03 | 2007-04-12 | Toyo Kohan Co., Ltd. | Treatment liquid for improving formability of aluminum alloy material |
| JP2008060057A (en) * | 2006-08-04 | 2008-03-13 | Sumitomo Electric Ind Ltd | Electrode for cold-cathode fluorescent lamp |
| JP2008297463A (en) * | 2007-05-31 | 2008-12-11 | Sanyo Chem Ind Ltd | Aqueous dispersion for steel material coating and resin-coated steel material |
-
1999
- 1999-06-01 JP JP15346799A patent/JP3836273B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000052485A (en) | 2000-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100779334B1 (en) | Surface treated tin-plated steel sheet and chemical treatment solution | |
| JPWO2003085171A1 (en) | Heat-resistant metal plate with excellent scratch resistance and corrosion resistance | |
| JP3836273B2 (en) | Method for producing a surface-treated metal plate excellent in workability, scratch resistance and corrosion resistance | |
| JP2009001854A (en) | Steel sheet for vessel | |
| JPWO2008029916A1 (en) | Steel plate for container and manufacturing method thereof | |
| TW573057B (en) | Zinc-comprising-plated high tension steel sheet | |
| JP2000052478A (en) | Surface treated metal plate excellent in corrosion resistance, mar resistance, perspiration resistance and lubrication, and manufacture thereof | |
| KR100614025B1 (en) | Resin coated steel sheet, cartridge cap and cartridge barrel using it | |
| JP3307326B2 (en) | Alloyed hot-dip galvanized steel sheet and method for producing the same | |
| JP4017078B2 (en) | Surface-treated steel sheet for bearing seal and bearing seal using the same | |
| JPH1148403A (en) | Surface-treated metallic sheet excellent in perspiration resistance and lubricity and manufacture thereof | |
| JPH0316726A (en) | Lubricating resin-treated steel plate with excellent moldability | |
| JP3590990B2 (en) | Lubricant resin coated steel plate for DI can | |
| KR20160027319A (en) | Zn alloy plated steel sheet having excellent anti-corrosion and good surface apperance and method for manufacturing the same | |
| JP3845445B2 (en) | High corrosion-resistant surface-treated steel sheet and manufacturing method thereof | |
| CN112981384B (en) | Coating liquid and coating method for iron-chromium-aluminum alloy | |
| JP5186815B2 (en) | Steel plate for containers | |
| JP3069489B2 (en) | Transparent fluororesin-coated stainless steel sheet and shutter slat excellent in wear resistance, scratch resistance and moldability | |
| JP2000015741A (en) | Galvanized steel plate excellent in thermal discoloring resistance, fuming properties on heating, corrosion resistance after heating, and scratch resistance | |
| JP2014208906A (en) | Laminated steel sheet excellent in corrosion resistance, processability, scratch resistance and abrasion resistance | |
| JP2006291288A (en) | Plated steel sheet for can | |
| JPH03104882A (en) | Surface treated steel sheet for di can excellent in aptitude for printing substrate | |
| JPH0760897A (en) | Lubricating black steel panel | |
| JPH11157000A (en) | Resin-coated steel sheet having excellent wear resistance, lubricating properties, and electrical conductivity | |
| JP2001049416A (en) | Hot dip aluminum plated steel sheet excellent in corrosion resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040624 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060414 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060502 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060703 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060725 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060726 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 3836273 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090804 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100804 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100804 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110804 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120804 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130804 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |