JP3516826B2 - Pre-coated metal sheet to which dust is unlikely to adhere and method of manufacturing the same - Google Patents
Pre-coated metal sheet to which dust is unlikely to adhere and method of manufacturing the sameInfo
- Publication number
- JP3516826B2 JP3516826B2 JP04852097A JP4852097A JP3516826B2 JP 3516826 B2 JP3516826 B2 JP 3516826B2 JP 04852097 A JP04852097 A JP 04852097A JP 4852097 A JP4852097 A JP 4852097A JP 3516826 B2 JP3516826 B2 JP 3516826B2
- Authority
- JP
- Japan
- Prior art keywords
- pcm
- antistatic agent
- metal plate
- dust
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プレコート金属板
の加工ラインに浮遊するゴミが、静電気により塗装面に
付着しにくいプレコート金属板及びその製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-coated metal plate and a method for manufacturing the pre-coated metal plate, in which dust floating on a processing line for the pre-coated metal plate hardly adheres to a coated surface due to static electricity.
【０００２】[0002]
【従来の技術】建材、家電、雑貨、自動車などの分野に
おいては、金属板を成形加工後に組立・塗装するという
従来のポストコート方式に代わって、あらかじめ塗装さ
れた金属板（プレコート金属板：ＰＣＭと略す）を成形
加工し、接合して製品とするプレコート方式が多く採用
されるようになってきた。しかし、ＰＣＭの加工ライン
で、重ね合わせたＰＣＭから一枚ずつピックアップする
際におもて面塗膜と裏面塗膜がこすれたり、ＰＣＭがゴ
ムや金属製のコンベアーにより搬送される際に塗膜面が
コンベアーとこすれたり、ＰＣＭを切断・打ち抜き・成
形加工する際に押さえ治具、ポンチ、金型等の各種治具
と塗膜面がこすれたりすることにより静電気が発生し、
ＰＣＭにホコリが付着したり、帯電したＰＣＭに触れて
電撃を受けたりすることが度々おこる。特開平５−２７
８１７０号公報及び特開平５−２７９６４１号公報に
は、これを防止するために、ＰＣＭ表面に帯電防止剤を
含有させた保護シートを貼り付けることが開示されてい
る。2. Description of the Related Art In the fields of building materials, home appliances, sundries, automobiles, etc., a pre-painted metal plate (pre-coated metal plate: PCM) is used instead of the conventional post-coating method of assembling and painting the metal plate after molding. The pre-coating method, in which the products are formed and joined together, has become widely adopted. However, in the PCM processing line, the front surface coating and the back surface coating are rubbed when picking up one by one from the superposed PCM, or the coating is applied when the PCM is conveyed by a rubber or metal conveyor. Static electricity is generated by rubbing the surface with the conveyor, or by rubbing the jigs, punches, molds and other jigs and the coating surface when cutting, punching and forming PCM.
It often happens that dust adheres to the PCM, or the PCM is touched with electric charges and receives an electric shock. Japanese Patent Laid-Open No. 5-27
In order to prevent this, Japanese Patent Application Laid-Open No. 8170 and Japanese Patent Application Laid-Open No. 5-279641 disclose that a protective sheet containing an antistatic agent is attached to the PCM surface.
【０００３】[0003]
【発明が解決しようとする課題】しかし、前述のように
保護シートを貼り付けるのではシート脱着に手間がかか
るうえ、ＰＣＭの製造コストが高くなる問題があった。
本発明は上記課題を解決し、保護シートなしにゴミの付
着しにくいＰＣＭを提供することを目的とする。However, if the protective sheet is attached as described above, it takes a lot of time to remove and attach the sheet, and the manufacturing cost of the PCM increases.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a PCM that does not easily have dust attached without a protective sheet.
【０００４】[0004]
【課題を解決するための手段】本発明は、ＰＣＭの最表
層の塗膜中には帯電防止剤を混入させないで、前記最表
層の表面に帯電防止剤が吸着されて付与されたことを特
徴とするゴミの付着しにくいＰＣＭ、及び、ＰＣＭの製
造ラインにおいて、ＰＣＭの最表層の塗膜中には帯電防
止剤を混入させないで前記塗膜を焼き付け、その後の冷
却工程で帯電防止剤を混入させた冷却水により前記金属
板を冷却し、その後、エアーブローで水滴を除くことに
よって前記金属板の最表層の表面に帯電防止剤を吸着さ
せ、前記金属板の最表層に帯電防止機能を付与すること
を特徴とするゴミの付着しにくいＰＣＭの製造方法であ
る。According to the present invention, an antistatic agent is not mixed in the coating film of the outermost layer of PCM.
The PCM is characterized in that an antistatic agent is adsorbed and applied to the surface of the layer , and in a PCM production line , the antistatic agent is present in the outermost coating layer of the PCM.
Baking the coated film is not to mix the sealant, and cooling the metal plate by the cooling water which is mixed antistatic agent in the cooling step after the, then, that with the exception of water droplets in the air blow
Therefore, the antistatic agent should not be adsorbed on the outermost surface of the metal plate.
The method for producing a PCM is characterized in that the outermost surface of the metal plate is provided with an antistatic function, and dust is unlikely to adhere to the PCM.
【０００５】本発明は、ＰＣＭ塗膜の最表層に帯電防止
剤を吸着させ、表面電気抵抗率を下げ、ゴミの付着を抑
えるものである。According to the present invention, an antistatic agent is adsorbed on the outermost surface layer of a PCM coating film to lower the surface electrical resistivity and suppress the adhesion of dust.
【０００６】実際にＰＣＭを成形加工し組み立てる工程
を観察した結果、そのラインで付着するゴミは、ＰＣＭ
を切断したりパンチングしたりする際に発生するＰＣＭ
原板のめっきの粉や、各種の樹脂、繊維等多種多様にわ
たることがわかった。これらのゴミの帯電性を調べたと
ころ、プラスに帯電しやすいもの（帯電列上でプラス傾
向のもの）や、マイナスに帯電しやすいもの（帯電列上
でマイナス傾向のもの）など様々であった。このような
極性の異なるゴミが共に付着しないＰＣＭを得るには、
ＰＣＭの塗膜表層に帯電防止剤を吸着させ、表面電気抵
抗率を下げればよい。表面電気抵抗率を下げるために塗
膜中に導電性物質や帯電防止剤を混入させることは、他
の性能が失われることが多いうえ、帯電防止機能は塗膜
最表層の物性のみで決定されるため、塗膜内に含有する
帯電防止剤は無駄になるだけであり、避けるべきであ
る。As a result of observing the process of actually forming and assembling the PCM, dust adhering to the line is PCM.
PCM generated when cutting and punching
It was found that there are a wide variety of materials such as the plating powder of the original plate, various resins and fibers. When the chargeability of these dusts was examined, it was found that there were various things such as those that tend to be positively charged (those that tend to be positive on the charging column) and those that tend to be negatively charged (those that tend to be negative on the charging column). . In order to obtain a PCM in which dust with different polarities does not adhere together,
The surface electrical resistivity may be lowered by adsorbing an antistatic agent on the surface layer of the coating film of PCM. Incorporating a conductive substance or antistatic agent into the coating film to lower the surface electrical resistivity often results in loss of other performances, and the antistatic function is determined only by the physical properties of the outermost surface layer of the coating film. Therefore, the antistatic agent contained in the coating film is wasted and should be avoided.
【０００７】本ＰＣＭを製造するために、通常のＰＣＭ
の塗装工程より後にもう１工程、帯電防止剤の塗布工程
を必要とする。しかし、一般的なＰＣＭの製造ラインで
は、塗装工程以後にこのような工程を導入する余地はな
い。そこで、本発明の製造方法では、塗膜焼き付け後の
冷却工程で、冷却水に帯電防止剤を混入させることにし
た。In order to manufacture this PCM, an ordinary PCM is used.
After the coating process of 1), another process of applying an antistatic agent is required. However, in a general PCM manufacturing line, there is no room for introducing such a process after the painting process. Therefore, in the manufacturing method of the present invention, the antistatic agent is mixed in the cooling water in the cooling step after baking the coating film.
【０００８】[0008]
【発明の実施の形態】塗膜の最表層に吸着させる帯電防
止剤は水溶性のものを選択すればよいが、例としては、
第４級アンモニウム塩型、イミダゾリン型等のカチオン
系帯電防止剤、ベタイン型の両性イオン系帯電防止剤、
サルフェート型、フォスフェート型等のアニオン系帯電
防止剤が挙げられる。帯電防止剤の濃度は高いほうが効
果的である。効果の現れる最低濃度は帯電防止剤の種類
によってまちまちであるが、おおむね０．１ｍｏｌ／ｌ
である。BEST MODE FOR CARRYING OUT THE INVENTION The antistatic agent to be adsorbed on the outermost layer of the coating film may be selected from water-soluble ones.
Cationic antistatic agents such as quaternary ammonium salt type and imidazoline type, betaine type amphoteric ion type antistatic agents,
Anionic antistatic agents such as sulfate type and phosphate type are mentioned. The higher the concentration of the antistatic agent, the more effective. The lowest concentration at which the effect appears varies depending on the type of antistatic agent, but is generally 0.1 mol / l
Is.
【０００９】ＰＣＭの原板とする金属板の種類として
は、例えば、熱延鋼板、冷延鋼板や、亜鉛めっき鋼板、
合金化溶融亜鉛めっき鋼板、亜鉛合金めっき鋼板、アル
ミめっき鋼板、クロムめっき鋼板、ニッケルめっき鋼
板、銅めっき鋼板などのめっき鋼板、ステンレス鋼板、
アルミ板、銅板、アルミ合金板など、公知の金属板ある
いは合金板が挙げられる。The type of metal plate used as the original plate of PCM includes, for example, hot rolled steel plate, cold rolled steel plate, galvanized steel plate,
Alloyed hot dip galvanized steel sheet, zinc alloy plated steel sheet, aluminum plated steel sheet, chrome plated steel sheet, nickel plated steel sheet, plated steel sheet such as copper plated steel sheet, stainless steel sheet,
Known metal plates or alloy plates such as an aluminum plate, a copper plate, and an aluminum alloy plate can be used.
【００１０】塗膜の種類としては、例えば、ポリエステ
ル樹脂系、エポキシ樹脂系、アクリル樹脂系、ウレタン
樹脂系、フッ素樹脂系、エーテル樹脂系、硫黄樹脂系、
塩化ビニル樹脂系、オレフィン樹脂系、ケトン樹脂系、
シリコン樹脂などの有機被覆、シロキサン系、ボロン
系、ボロシロキサン系などの無機被覆や、シロキサン、
ボロシロキサン等の無機の骨格を有機樹脂中に導入した
ような有機無機複合型の被膜のいずれでも、本発明ＰＣ
Ｍの塗膜として使用できる。The type of coating film is, for example, polyester resin type, epoxy resin type, acrylic resin type, urethane resin type, fluororesin type, ether resin type, sulfur resin type,
Vinyl chloride resin type, olefin resin type, ketone resin type,
Organic coating such as silicon resin, inorganic coating such as siloxane, boron, borosiloxane, siloxane,
In any of the organic-inorganic composite type coatings in which an inorganic skeleton such as borosiloxane is introduced into an organic resin, the present invention PC
It can be used as a coating film for M.
【００１１】塗料の金属板表面への形成方法としては、
浸漬法、カーテンフロー法、ロールコート法、バーコー
ト法、静電法、刷毛塗り法、Ｔ−ダイ法、ラミネート法
など、その手段は問わない。As a method of forming the paint on the surface of the metal plate,
Any means such as a dipping method, a curtain flow method, a roll coating method, a bar coating method, an electrostatic method, a brush coating method, a T-die method and a laminating method may be used.
【００１２】焼き付け方法としては、熱風、常温、近赤
外線、遠赤外線、誘導加熱等が挙げられる。Examples of the baking method include hot air, room temperature, near infrared rays, far infrared rays, and induction heating.
【００１３】帯電防止剤を混入した冷却水による冷却方
法としては、スプレー式、浸漬式いずれでもよく、冷却
後にエアーで水滴を取り除く。The cooling method using cooling water mixed with an antistatic agent may be either a spray method or a dipping method, and water drops are removed by air after cooling.
【００１４】[0014]
【実施例】実施例及び比較例を表１に示す。EXAMPLES Examples and comparative examples are shown in Table 1.
【００１５】ＰＣＭの原板としては、すべて厚み０．５
ｍｍ、片面付着量６０ｇ／ｍ2 （両面で１２０ｇ／
ｍ2 ）の溶融亜鉛めっき鋼板に、クロムとして２０ｍｇ
／ｍ2 の付着量となるようにクロメート処理を両面に施
したものを使用した。塗膜の構成は、おもて面は２コー
トとし、プライマー塗料はポリエステル系のものを乾燥
膜厚が５μｍとなるように塗布し、到達板温が２１０
℃、到達時間が４５秒の条件で焼き付け、その上に高分
子ポリエステル系のトップ塗料を乾燥膜厚が１８μｍと
なるように塗布し、到達板温が２３０℃、到達時間が４
５秒の条件で焼き付けた。裏面は１コートとし、ポリエ
ステル系塗料を乾燥膜厚が５μｍとなるように塗布し、
到達板温が２３０℃、到達時間が４５秒の条件で焼き付
けた。その後、所定の帯電防止剤を混入した水に浸漬さ
せて冷却し、エアーブローで水滴を除いた。The thickness of the original PCM plate is 0.5
mm, 60 g / m 2 on one side (120 g / m on both sides)
20 mg as chromium on hot dip galvanized steel sheet of m 2 ).
The surface of each side was subjected to chromate treatment so that the adhesion amount was / m 2 . The composition of the coating film is 2 coats on the front surface, and the primer coating material is a polyester coating material so that the dry film thickness is 5 μm.
After baking at 45 ° C for 45 seconds, the top coating of high molecular polyester is applied on top of it so that the dry film thickness is 18 µm, and the reaching plate temperature is 230 ° C and the reaching time is 4
Baking was performed for 5 seconds. The back side is 1 coat, and the polyester-based paint is applied so that the dry film thickness is 5 μm.
Baking was performed under the conditions that the reached plate temperature was 230 ° C. and the reached time was 45 seconds. Then, it was immersed in water containing a predetermined antistatic agent, cooled, and then water drops were removed by air blow.
【００１６】各サンプルにつき、ＰＣＭ実加工ラインで
のゴミ付きの有無を観察した結果を併せて表１に示す。
これらの結果から明らかなように、本発明のＰＣＭは、
静電気によるゴミの付着を抑える効果を有する。Table 1 also shows the results of observing the presence or absence of dust on the PCM actual processing line for each sample.
As is clear from these results, the PCM of the present invention
It has the effect of suppressing the attachment of dust due to static electricity.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明のＰＣＭは、ＰＣＭの加工ライン
において、静電気によって各種のゴミが付着しにくく、
美麗な製品を組み立てられる。さらに、本発明のＰＣＭ
の製造方法により、通常のプレコート塗装ラインに大き
な設備変更を施すことなく、本発明のＰＣＭを製造する
ことができる。EFFECTS OF THE INVENTION The PCM of the present invention, in a PCM processing line, is unlikely to have various kinds of dust attached due to static electricity,
You can assemble beautiful products. Furthermore, the PCM of the present invention
According to the manufacturing method of (1), the PCM of the present invention can be manufactured without making a major facility change in a normal precoat coating line.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−285451（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 2/00 - 2/40 B05D 1/00 - 7/26 B32B 1/00 - 35/00 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-285451 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C23C 2/00-2/40 B05D 1 / 00-7/26 B32B 1/00-35/00
Claims (2)
帯電防止剤を混入させないで前記最表層の表面に帯電防
止剤が吸着されて付与されたことを特徴とするゴミの付
着しにくいプレコート金属板。1. The coating film of the outermost layer of the precoated metal sheet
A pre-coated metal plate which is hard to attach dust, characterized in that an antistatic agent is adsorbed and applied to the surface of the outermost layer without mixing the antistatic agent.
て、前記金属板の最表層の塗膜中には帯電防止剤を混入
させないで前記塗膜を焼き付け、その後の冷却工程で帯
電防止剤を混入させた冷却水により前記金属板を冷却
し、その後、エアーブローで水滴を除くことによって前
記金属板の最表層の表面に帯電防止剤を吸着させ、前記
金属板の最表層に帯電防止機能を付与することを特徴と
するゴミの付着しにくいプレコート金属板の製造方法。2. A production line odor precoated metal plate
Mix the antistatic agent in the outermost coating of the metal plate.
Baking the coating film not let, the metal plate is cooled by cooling water is mixed band <br/> antistatic agent in the cooling step after the, then, before by removing water droplets by air blow
The antistatic agent is adsorbed on the surface of the outermost layer of the metal plate, and
A method for producing a precoated metal sheet, which is resistant to dust attachment, characterized by imparting an antistatic function to the outermost surface layer of the metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04852097A JP3516826B2 (en) | 1997-02-18 | 1997-02-18 | Pre-coated metal sheet to which dust is unlikely to adhere and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04852097A JP3516826B2 (en) | 1997-02-18 | 1997-02-18 | Pre-coated metal sheet to which dust is unlikely to adhere and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10226868A JPH10226868A (en) | 1998-08-25 |
| JP3516826B2 true JP3516826B2 (en) | 2004-04-05 |
Family
ID=12805643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04852097A Expired - Fee Related JP3516826B2 (en) | 1997-02-18 | 1997-02-18 | Pre-coated metal sheet to which dust is unlikely to adhere and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3516826B2 (en) |
-
1997
- 1997-02-18 JP JP04852097A patent/JP3516826B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10226868A (en) | 1998-08-25 |
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