JP3060073B2 - Method of manufacturing organic laminated steel sheet for three-piece can in coil coating line - Google Patents
Method of manufacturing organic laminated steel sheet for three-piece can in coil coating lineInfo
- Publication number
- JP3060073B2 JP3060073B2 JP3113497A JP11349791A JP3060073B2 JP 3060073 B2 JP3060073 B2 JP 3060073B2 JP 3113497 A JP3113497 A JP 3113497A JP 11349791 A JP11349791 A JP 11349791A JP 3060073 B2 JP3060073 B2 JP 3060073B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- organic
- piece
- film
- thermosetting
- 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]
【産業上の利用分野】本発明は、金属缶用有機積層鋼
板、特に電気抵抗溶接あるいは有機接着等の方法で円筒
状の缶胴を成形し、天地蓋を巻締めて内容物を充填す
る、いわゆる３ピース缶用有機積層鋼板の製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic laminated steel sheet for metal cans, in particular, to form a cylindrical can body by a method such as electric resistance welding or organic bonding, and to wind the canopy to fill the contents. The present invention relates to a method for producing a so-called organic laminated steel sheet for a three-piece can.
【０００２】[0002]
【従来の技術】周知の如く、金属缶の製造方法として、
絞り加工あるいは絞りとしごき加工等により成形される
缶底と缶胴が一体となった２ピース缶と、電気抵抗溶接
あるいは有機接着等の方法で円筒状の缶胴を成形し、天
地蓋を巻締めて成形する３ピース缶が知られている。2. Description of the Related Art As is well known, a method for manufacturing a metal can is as follows.
A two-piece can with an integrated can bottom and can body formed by drawing or drawing and ironing, and a cylindrical can body formed by electrical resistance welding or organic bonding, etc. There are known three-piece cans that are formed by tightening.
【０００３】３ピース缶用素材としては、鋼板に錫めっ
きとクロメート処理を施したブリキ系素材、鋼板にニッ
ケルめっきとクロメート処理を施したニッケルめっき系
素材、鋼板表面に金属クロムと水和酸化クロムの２層皮
膜を有するティンフリースチール系素材が使用されてい
る。これらの素材は、殆どの場合、内容物保持性（耐食
性）の面より内面塗装が施され、缶外面には内容物表示
のための商標デザインが印刷されている。[0003] Materials for three-piece cans include tin-based materials in which a steel plate is subjected to tin plating and chromate treatment, nickel-plated materials in which a steel plate is subjected to nickel plating and chromate treatment, and metal chromium and hydrated chromium oxide on the surface of the steel plate. A tin-free steel-based material having a two-layer coating is used. In most cases, these materials are coated with an inner surface from the viewpoint of content retention (corrosion resistance), and a trademark design for displaying the content is printed on the outer surface of the can.
【０００４】このような内面塗装および外面印刷は、前
述せる３ピース缶用素材を切板にした後、切板塗装ライ
ンにて、内面塗装（１回目）、外面印刷下地用ホワイト
コート（２回目）、外面印刷（３回目）の３回通板によ
り製造される。高度の耐食性が要求される用途には２度
の内面塗装が必要であり、外面印刷も５色以上の多色印
刷の場合、２度に亘る印刷が必要な場合もあり、結果と
して４回通板あるいは５回通板により内外面の塗装印刷
が行われることもある。そして、塗料やインキの乾燥の
ため１回の通板毎に切板は焼付け炉で加熱される必要が
ある。[0004] Such an inner surface coating and outer surface printing are performed by cutting the above-mentioned three-piece can material into a cutting plate, and then applying an inner surface coating (the first time) and a white coat for the outer surface printing base (the second time) on a cutting plate coating line. ), Manufactured by three-time passing of outer surface printing (third time). For applications requiring a high degree of corrosion resistance, two internal coatings are required, and in the case of multi-color printing of five or more colors, the external printing may require two printings, resulting in four passes. In some cases, the inner and outer surfaces are coated and printed by using a plate or five passes. In addition, the cutting plate needs to be heated in a baking furnace for each pass of the plate for drying the paint and the ink.
【０００５】このような塗装印刷工程の合理化のため、
いわゆるコイルコーティング法にて内面塗装および外面
印刷用ホワイトコートを１回の通板にて行う方法が考案
され実用化されている。その場合にも、外面印刷まで一
貫して連続的に行うことは、金属素地をベースとする場
合には印刷精度を出すことが難しく、切板にした後、外
面印刷を行わざるをえない状態にある。In order to streamline such a coating printing process,
A method of performing white coating for inner surface coating and outer surface printing with a single pass by a so-called coil coating method has been devised and put into practical use. Even in such a case, it is difficult to achieve printing accuracy when using a metal base as it is consistent and continuous until the external printing is performed. It is in.
【０００６】以上のごとく多数回のライン通板により塗
装印刷が行われた鋼板の缶胴溶接相当部は無塗装状態に
て残されており、缶寸法に相当する大きさに切断された
後、円筒状に丸められ、溶接させることにより３ピース
缶胴とされる。As described above, a portion corresponding to the can body welding of a steel plate which has been subjected to painting printing by a large number of line passing operations is left unpainted, and after being cut to a size corresponding to the can size, It is rolled into a cylindrical shape and welded into a three-piece can body.
【０００７】[0007]
【発明が解決しようとする課題】このような煩雑な３ピ
ース缶用の塗装印刷工程は、（１）生産性が悪い、
（２）仕掛り期間が長い、（３）多数の人手を要する、
（４）印刷仕上り外観の高度化が難しい、（５）極薄材
の使用が困難である、（６）熱エネルギーの消費量が多
い、等の多くの問題を抱え、３ピース缶の競争力を低下
させる原因となっていた。The complicated painting and printing process for three-piece cans has the following disadvantages.
(2) The work-in-progress period is long, (3) a lot of manpower is required,
(4) It is difficult to enhance the appearance of the printed finish, (5) It is difficult to use ultra-thin materials, (6) There is a lot of heat energy consumption, etc. Was causing the decrease.
【０００８】本発明は、この煩雑な塗装印刷工程を抜本
的に変革することにより、上記の６項目に亘る問題点を
一挙に解決し、フレキシビリティ高く、品質・生産性共
に優れた製造方法を見出したものである。The present invention solves the above-mentioned six problems at a glance by drastically changing the complicated painting and printing process, and provides a manufacturing method which is highly flexible and has excellent quality and productivity. It was found.
【０００９】[0009]
【課題を解決するための手段】本発明に使用される表面
処理鋼板は特に限定されるものではないが、錫・ニッケ
ル・クロム・アルミニウム等の金属、合金あるいはその
酸化物がめっきされ、最表面には有機物との密着性確保
のためクロメート処理あるいは燐酸塩処理等が施され
る。The surface-treated steel sheet used in the present invention is not particularly limited, but a metal such as tin, nickel, chromium, aluminum, or an alloy thereof or an oxide thereof is plated. Is subjected to a chromate treatment or a phosphate treatment in order to secure adhesion to an organic substance.
【００１０】この鋼板はコイル製品として供給され、ま
ずコイルコーティングラインの前面にて、鋼板の両面
に、ほぼ表裏対応した位置関係にて、缶径相当（缶の円
周方向の長さ）の幅で且つ１〜１０ｍｍの非塗装部を両
側に残した形で、該鋼板の長手方向に連続的且つストラ
イプ状に熱硬化型有機塗料が施される。この非塗装部
は、後続する缶胴接合ラインでの溶接性を確保するため
に残される部分である。従って、内面塗装と外面塗装の
位置関係は重要であり、鋼板表裏共に塗装されていない
部分が最低１ｍｍは必要である。缶外面相当面には、後
続の印刷デザインの鮮明度確保のため白色顔料等を含む
塗料が使用される場合が多いが、顔料を必要としない場
合もある。顔料を添加する場合は、酸化チタン系の白色
顔料が主として用いられ、１〜３０重量％の範囲で添加
される。１％未満では白色化の効果が少なく、３０％を
超えると白色化の効果がほぼ飽和すると共に塗膜性状が
悪化する傾向にあり、３０％以下が良い。より望ましい
範囲は、１０〜２５％の範囲である。[0010] This steel sheet is supplied as a coil product. First, a width equivalent to the can diameter (length in the circumferential direction of the can) is provided at the front surface of the coil coating line, on both sides of the steel plate, in a positional relationship substantially corresponding to the front and back. And 1-10mm unpainted parts
In the longitudinal direction of the steel sheet,
A thermosetting organic paint is applied in an ip shape . This unpainted portion is a portion left to ensure weldability in the subsequent can body joining line. Therefore, the positional relationship between the inner surface coating and the outer surface coating is important, and the uncoated portion of both the front and back of the steel plate needs to be at least 1 mm. A paint containing a white pigment or the like is often used on the surface corresponding to the outer surface of the can in order to ensure the clarity of the subsequent print design, but the pigment may not be required in some cases. When a pigment is added, a titanium oxide-based white pigment is mainly used, and is added in a range of 1 to 30% by weight. If it is less than 1%, the effect of whitening is small, and if it exceeds 30%, the effect of whitening is almost saturated and the properties of the coating film tend to be deteriorated. A more desirable range is a range of 10 to 25%.
【００１１】熱硬化型有機塗料塗布後、熱風炉中にて加
熱することにより塗料を硬化させる。その後に積層され
る多層構造フィルムの接着力を強化するためには、熱硬
化型有機塗料を完全硬化させず半硬化以下の焼付けを行
い、多層構造フィルムを積層後、完全硬化させる方法が
有効である。ラインスピードは１００〜３００mpm にて
板温は２５０〜３００℃に加熱され、１０〜３０秒の加
熱時間内にて硬化反応を完了させる。After applying the thermosetting organic coating, the coating is cured by heating in a hot air oven. In order to strengthen the adhesive strength of the multilayer structure film that is subsequently laminated, it is effective to bake the thermosetting organic paint completely without curing or semi-curing, laminate the multilayer structure film, and completely cure it. is there. The line speed is 100 to 300 mpm, the plate temperature is heated to 250 to 300 ° C., and the curing reaction is completed within a heating time of 10 to 30 seconds.
【００１２】次に、缶外面相当面上には、予め商標デザ
インが印刷された多層構造フィルムを該熱硬化型有機塗
膜面上に、ストライプ状に、連続的に、同一ライン内に
て積層することを必要とする。この際、下層を形成する
熱硬化型有機塗膜の幅と多層構造フィルム幅は同等であ
り、位置的にも“ズレ”のないように積層することが重
要である。また、積層される多層構造フィルム幅全面に
亘り接着される必要があり、基本的には多層構造フィル
ム側に接着機能を付与しておくことが必要である。Next, on the surface corresponding to the outer surface of the can, a multilayer structure film on which a trademark design has been printed in advance is laminated on the surface of the thermosetting organic coating film in the form of stripes continuously in the same line. Need to do. At this time, the width of the thermosetting organic coating film forming the lower layer is equal to the width of the multilayer structure film, and it is important to laminate the films so that there is no "shift" even in the position. In addition, it is necessary to adhere over the entire width of the multilayer structure film to be laminated, and basically, it is necessary to provide an adhesive function to the multilayer structure film side.
【００１３】多層構造フィルムの基本的構成は、鋼板に
接する側より、接着剤層・印刷インキ層・担体フィルム
層・トップコート層の４層より構成され、トップコート
層は最外面層となり、高速製缶ラインでの傷つき防止の
ための潤滑層を形成する。接着剤層・印刷インキ層・ト
ップコート層が必要最低限の層であるが、これらのみで
形成されるフィルムを作成する困難さより、担体フィル
ム層の存在が必要とされる。The basic structure of a multilayer structure film is composed of four layers, an adhesive layer, a printing ink layer, a carrier film layer, and a top coat layer, from the side in contact with the steel sheet, and the top coat layer is the outermost surface layer. Form a lubricating layer to prevent damage in the can-making line. The adhesive layer, the printing ink layer and the top coat layer are the minimum necessary layers, but the presence of a carrier film layer is required due to the difficulty in producing a film formed of only these layers.
【００１４】この多層構造フィルムの構成は各種の変形
が可能である。例えば、熱硬化型接着剤／印刷インキ／
飽和ポリエステル樹脂／トップコート層あるいは飽和ポ
リエステル樹脂／印刷インキ／飽和ポリエステル樹脂／
トップコート層の４層構造を例示することができる。更
に、飽和ポリエステル樹脂／印刷インキ／トップコート
層の３層構造とすることも可能であり、その際に飽和ポ
リエステル樹脂中に白色顔料を含有させることにより、
下層の熱硬化型有機塗膜層を省略することも可能であ
る。即ち、鋼板の片面に内面塗料のみを先行してストラ
イプ状に塗装し、焼付け硬化後、反対側の面に白色顔料
を含む飽和ポリエステル樹脂／印刷インキ／トップコー
トの３層構造を有するフィルムを表裏対応する位置関係
にて積層することにより、最も経済的な製品を製造する
ことが可能となる。この場合、熱硬化型有機塗料の塗布
を先行し、多層構造フィルムの積層を後続させること
が、多層構造の担体フィルムである飽和ポリエステル樹
脂層の結晶構造制御上必要とされる。The structure of the multilayer film can be modified in various ways. For example, thermosetting adhesive / printing ink /
Saturated polyester resin / Top coat layer or saturated polyester resin / Printing ink / Saturated polyester resin /
A four-layer structure of the top coat layer can be exemplified. Further, a three-layer structure of a saturated polyester resin / printing ink / top coat layer is also possible. In this case, by adding a white pigment to the saturated polyester resin,
It is also possible to omit the lower thermosetting organic coating layer. That is, a film having a three-layer structure of a saturated polyester resin containing a white pigment / printing ink / top coat is coated on one side of a steel sheet by coating only the inner surface paint in advance in a stripe shape, and after baking and hardening, on the opposite side. By stacking in a corresponding positional relationship, the most economical product can be manufactured. In this case, it is necessary to control the crystal structure of the saturated polyester resin layer, which is a carrier film having a multilayer structure, by preceding the application of the thermosetting organic paint to the lamination of the multilayer structure film.
【００１５】添加される白色顔料は、酸化チタン系のも
のが主として用いられ、１〜３０重量％の範囲で添加さ
れる。１％未満では白色化の効果が少なく、３０％を超
えると白色化の効果がほぼ飽和すると共にフィルムの加
工性が悪化する傾向にあり、３０％以下が良い。より望
ましい範囲は、１０〜２５％の範囲である。３ピース缶
は、溶接あるいは接着により成形され、接合部の補修塗
装の焼付けあるいは内容物充填後の加熱殺菌処理等の熱
工程を経て飲料缶その他に使用される。これらの熱工程
に耐え得るためには、積層後の飽和ポリエステル樹脂層
が１軸あるいは２軸延伸された配向結晶構造を有するこ
とが有用であり、フィルム積層後に２４０℃を超える高
温にさらすことは大きな問題を生じる。従って、短時間
・高温サイクルにて熱硬化型有機塗料の塗装を完了さ
せ、２４０℃以下、望ましくは２１０℃以下にて多層構
造フィルムを積層することが必要とされる。As the white pigment to be added, a titanium oxide-based pigment is mainly used, and is added in the range of 1 to 30% by weight. If it is less than 1%, the whitening effect is small, and if it exceeds 30%, the whitening effect is almost saturated and the processability of the film tends to be deteriorated. A more desirable range is a range of 10 to 25%. The three-piece can is formed by welding or bonding, and is used for beverage cans and the like through a heating process such as baking of a repair coating at the joint or heat sterilization after filling the contents. In order to withstand these heat processes, it is useful that the saturated polyester resin layer after lamination has an oriented crystal structure that is uniaxially or biaxially stretched. It creates big problems. Therefore, it is necessary to complete the application of the thermosetting organic paint in a short time and high temperature cycle, and to laminate the multilayered film at 240 ° C. or less, preferably 210 ° C. or less.
【００１６】本発明に使用される飽和ポリエステル樹脂
は、ポリエチレンテレフタレートホモポリマーあるいは
コポリエステル樹脂あるいはこれらのブレンドによる樹
脂フィルムが使用される。良好な接着力を得るためには
コポリエステル樹脂フィルムの使用が望ましい。このフ
ィルムは、２軸延伸配向結晶構造を有し、両面共にコロ
ナ処理にて表面張力５０dyne/cm 以上を有する表面とさ
れる。As the saturated polyester resin used in the present invention, a resin film of a polyethylene terephthalate homopolymer, a copolyester resin, or a blend thereof is used. It is desirable to use a copolyester resin film in order to obtain good adhesive strength. This film has a biaxially oriented crystal structure, and both surfaces have a surface tension of 50 dyne / cm or more by corona treatment.
【００１７】このフィルムの片面にトップコート層とし
てシリコンを含む熱硬化型ポリエステル樹脂が塗布さ
れ、フィルム収縮が発生しない低温（１３０〜１５０
℃）にて乾燥される。シリコン滑剤の添加量は、静摩擦
係数が０．２以下となるように調整することが重要であ
る。その後、ポリウレタン樹脂を主バインダーとする印
刷インキを使用するグラビア印刷ラインにて、トップコ
ート層の反対面に５色のグラビア印刷を行い、最終スタ
ンドにて硬化剤を含むポリウレタン系の接着剤を塗布・
乾燥し、４層構造を有するフィルムの製造を行うことが
できる。A thermosetting polyester resin containing silicon is applied as a top coat layer on one side of this film, and the film is kept at a low temperature (130 to 150 ° C.) at which film shrinkage does not occur.
C). It is important to adjust the addition amount of the silicone lubricant so that the coefficient of static friction is 0.2 or less. After that, a gravure printing line using a printing ink containing a polyurethane resin as a main binder is used to perform gravure printing of five colors on the opposite surface of the top coat layer, and a polyurethane adhesive containing a curing agent is applied at a final stand.・
After drying, a film having a four-layer structure can be produced.
【００１８】飽和ポリエステル樹脂／印刷インキ／飽和
ポリエステル樹脂／トップコート層の４層構造フィルム
の場合、グラビア印刷ラインにて印刷インキ／飽和ポリ
エステル樹脂／トップコート層の３層構造フィルムを作
成した後、印刷インキ面に低融点の飽和ポリエステル樹
脂フィルムを熱接着し、４層構造フィルムとして製造さ
れる。In the case of a film having a four-layer structure of saturated polyester resin / printing ink / saturated polyester resin / topcoat layer, a three-layer film of printing ink / saturated polyester resin / topcoat layer is prepared on a gravure printing line. A saturated polyester resin film having a low melting point is thermally bonded to the printing ink surface to produce a four-layer film.
【００１９】飽和ポリエステル樹脂／印刷インキ／トッ
プコートの３層構造フィルムの場合、トップコートを施
す前に印刷するため、グラビア印刷ラインにて一挙に製
造される。この際、飽和ポリエステル樹脂層が接着機能
を有する必要があり、配向結晶構造確保のため飽和ポリ
エステル樹脂層自体を２層構造とすることもある。ま
た、印刷の鮮映性を上げるため飽和ポリエステル樹脂層
に顔料を添加することも行われる。In the case of a three-layer film composed of a saturated polyester resin / printing ink / top coat, the film is printed at a stroke on a gravure printing line because it is printed before the top coat is applied. At this time, the saturated polyester resin layer needs to have an adhesive function, and the saturated polyester resin layer itself may have a two-layer structure in order to secure an oriented crystal structure. In addition, a pigment is added to the saturated polyester resin layer in order to enhance print clarity.
【００２０】[0020]
実施例１ 表面に付着量１．２g/m2の錫めっきと、錫めっき上に金
属クロム８mg/m2 と水和酸化クロム７mg/m2 （Ｃｒとし
て）を有する板厚０．１５mm、板幅８３２mmの薄鋼板の
片面に、熱硬化性エポキシ樹脂を５０mg/m2 の付着量
で、塗布部幅１６２．０mm、その両端に非塗布部１．９
mm（合計１６５．８mm）を設けて幅方向５条の連続帯
（ストライプ）状の塗布を行った。次いでその反対の面
に、酸化チタン系の白色顔料を含有する熱硬化性ポリエ
ステル樹脂を１２０mg/m2 の付着量で、エポキシ樹脂に
対応する位置関係にて連続帯状塗布後、加熱し、約２０
秒の加熱時間で表裏の樹脂層を硬化させた。Example 1 Tin plating having a coating weight of 1.2 g / m 2 on the surface and 8 mg / m 2 of chromium metal and 7 mg / m 2 (as Cr) of hydrated chromium oxide on the tin plating, a plate thickness of 0.15 mm, On one side of a thin steel plate having a width of 832 mm, a thermosetting epoxy resin is applied in an applied amount of 50 mg / m 2 at an application portion width of 162.0 mm and non-application portions 1.9 on both ends.
mm (total 165.8 mm) was applied in the form of a continuous strip (stripe) having five stripes in the width direction. Then, on the opposite side, a thermosetting polyester resin containing a titanium oxide-based white pigment was applied at a deposition amount of 120 mg / m 2 in a continuous band shape in a positional relationship corresponding to the epoxy resin, and then heated to about 20%.
The front and back resin layers were cured with a heating time of 2 seconds.
【００２１】最高到達温度として２７０℃まで加熱され
た鋼板は冷却ロールにて２００℃まで急速冷却され、熱
硬化型接着剤／印刷インキ／飽和ポリエステル樹脂／静
摩擦係数０．２以下のトップコート層よりなる合計１６
μｍの厚みの多層構造フィルムを熱接着した。この際、
使用された多層構造フィルムの幅は１６２．０mmであ
り、下地の熱硬化ポリエステル樹脂層と同一の幅で、そ
の真上に接着された。これらの作業はラインスピード２
００mpm にて連続して同一ライン内にて行われた。The steel sheet heated to a maximum temperature of 270.degree. C. is rapidly cooled to 200.degree. C. by a cooling roll, and is thermoset adhesive / printing ink / saturated polyester resin / static.
A total of 16 consisting of a top coat layer with a friction coefficient of 0.2 or less
A multilayer structure film having a thickness of μm was thermally bonded. On this occasion,
The width of the multi-layer structure film used was 162.0 mm, which was the same width as the underlying thermosetting polyester resin layer and was adhered directly above it. These operations are performed at line speed 2
It was performed continuously at the same line at 00 mpm.
【００２２】コイル状に巻き取られた製品は、両端に
１．９mmの非塗布部を有する１６５．８mm幅（缶径５
２．６mm相当）、１３６．２mm（缶高さ相当）のブラン
ク寸法に切り出され、多層構造フィルム接着面が缶外面
となるように溶接缶ラインにて使用された。 実施例２ 表面に付着量０．５８g/m2のニッケルめっきと、ニッケ
ルめっき上に７mg/m2 （Ｃｒとして）の水和酸化クロム
皮膜を有する板厚０．１８mm、板幅８３２mmの薄鋼板の
片面に、熱硬化性エポキシ樹脂を５０mg/m2 の付着量
で、塗布部幅１６２．０mm、その両端に非塗布部１．９
mm（合計１６５．８mm）を設けて幅方向５条の連続帯
（ストライプ）状の塗布を行った。反対側の面は無塗装
のまま約２０秒の間に最高到達温度２７０℃まで加熱
し、冷却ロールにて１６０℃まで急速冷却を行った。The product wound into a coil has a width of 165.8 mm (can diameter 5 mm) having 1.9 mm uncoated portions at both ends.
It was cut to a blank size of 136.2 mm (equivalent to can height) and used in a welding can line so that the adhesive surface of the multilayer structure film was the outer surface of the can. Example 2 A thin steel plate having a thickness of 0.18 mm and a width of 832 mm having a nickel plating of 0.58 g / m 2 on the surface and a hydrated chromium oxide film of 7 mg / m 2 (as Cr) on the nickel plating. On one side, a thermosetting epoxy resin was applied in an amount of 50 mg / m 2 , and the width of the coated portion was 162.0 mm, and the non-coated portion was 1.9 on both ends.
mm (total 165.8 mm) was applied in the form of a continuous strip (stripe) having five stripes in the width direction. The surface on the opposite side was heated to a maximum temperature of 270 ° C. in about 20 seconds without coating, and rapidly cooled to 160 ° C. by a cooling roll.
【００２３】白色顔料を含む飽和ポリエステル樹脂（低
融点接着層を有す）／印刷インキ／静摩擦係数０．２以
下のトップコート層の３層構造を有するフィルムを１６
０℃にて無塗装面上に積層するに際し、先行して塗装さ
れているエポキシ樹脂と表裏同等の位置となるように精
密なラミネート作業を行った。１６０℃にて積層後、接
着強度を上げるため再度２００℃まで加熱し、次いで水
冷・乾燥しコイル状に巻き取った。Saturated polyester resin containing white pigment (having low melting point adhesive layer) / Printing ink / Static friction coefficient 0.2 or less
A film having a three-layer structure of a lower top coat layer
When laminating on an unpainted surface at 0 ° C., a precise laminating operation was performed so that the front and back surfaces were equivalent to the epoxy resin previously coated. After lamination at 160 ° C., it was heated again to 200 ° C. in order to increase the adhesive strength, then cooled with water and dried, and wound into a coil.
【００２４】この製品は、実施例１と同様に１６５．８
×１３６．２mmの寸法に切り出され、缶径５２．６mm、
缶高さ（蓋巻締め前）１３６．２mmの溶接缶に成形され
た。 実施例３ 実施例１と同様の素材および塗装系を用い、鋼板の表裏
にストライブ状の塗装を行った。この鋼板を約１３秒の
加熱時間にて最高到達板温２００℃まで加熱し、その温
度にて缶外面相当面に飽和ポリエステル樹脂／印刷イン
キ／静摩擦係数０．２以下のトップコート層よりなる合
計１４μｍの３層構造のフィルムを積層した。フィルム
積層後、更に加熱し、最高到達板温２７０℃まで加熱す
ることにより、熱硬化性樹脂層を完全に硬化させ冷却し
た。This product was 165.8 in the same manner as in Example 1.
× 136.2mm, cut out to a can diameter of 52.6mm,
It was formed into a 136.2 mm weld height (before closing the lid). Example 3 Using the same material and coating system as in Example 1, a striped coating was applied to the front and back surfaces of the steel sheet. The steel sheet was heated at about 13 seconds of heating time to peak metal temperature 200 ° C., a total of the can outer surface corresponding surface at that temperature consisting of saturated polyester resin / printing ink / static friction coefficient 0.2 or less of the top coat layer A 14 μm three-layer film was laminated. After laminating the film, the thermosetting resin layer was further cured and heated to a maximum temperature of 270 ° C., whereby the thermosetting resin layer was completely cured and cooled.
【００２５】この製品は、実施例１と同様に１６５．８
×１３６．２mmの寸法に切り出され、缶径５２．６mm、
缶高さ（蓋巻締め前）１３６．２mmの溶接缶に成形され
た。This product is 165.8 in the same manner as in Example 1.
× 136.2mm, cut out to a can diameter of 52.6mm,
It was formed into a 136.2 mm weld height (before closing the lid).
【００２６】[0026]
【発明の効果】本発明は多くの利点を保障するものであ
る。まず、コイル製品を使用して連続塗装印刷を行うた
め、切板塗装ラインより約２倍の生産性を確保すること
ができる。次に、多数回のライン通板が不要なため仕掛
り期間が短くて済む。また、コイル両面に塗布した熱硬
化型有機塗料を一度に焼付けることに加え、従来法のよ
うなウイケットを使用して焼付け炉内を搬送する必要が
ないため、消費熱エネルギーが少なくて済む。コイル製
品の使用は素材板厚が極薄化しても、そう大きなハンド
リング問題を生じない利点をも有している。グラビア印
刷による印刷外観の高級化、工程省略による省力化等、
従来の３ピース缶用鋼板の塗装印刷工程における問題を
一挙に解決することができる。The invention guarantees a number of advantages. First, since continuous coating printing is performed using a coil product, it is possible to secure about twice the productivity as compared with the cutting plate coating line. Secondly, the in-process period can be shortened because a large number of line passing operations are not required. Further, in addition to baking the thermosetting organic coating applied to both surfaces of the coil at once, it is not necessary to transport the inside of the baking furnace using a wicket as in the conventional method, so that less heat energy is consumed. The use of coil products also has the advantage that even if the thickness of the material is extremely thin, no significant handling problems occur. Gravure printing to improve the appearance of printing, labor saving by omitting processes, etc.
The problems in the coating printing process of the conventional steel plate for three-piece cans can be solved at once.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 林 知彦 千葉県富津市新富20−１ 新日本製鐵株 式会社 中央研究本部内 (56)参考文献 特開 昭63−270581（ＪＰ，Ａ) 特開 平１−145130（ＪＰ，Ａ) 特開 昭53−119986（ＪＰ，Ａ) 特開 昭62−199432（ＪＰ，Ａ) 特公 昭44−24357（ＪＰ，Ｂ１) 特公 昭60−51424（ＪＰ，Ｂ２) 特公 平１−32789（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B05D 7/14 B65D 8/16 B65D 25/34 B32B 15/08 ────────────────────────────────────────────────── ─── Continued from the front page (72) Tomohiko Hayashi 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Corporation Central Research Division (56) References JP-A-63-270581 (JP, A) JP-A-1-145130 (JP, A) JP-A-53-11996 (JP, A) JP-A-62-1199432 (JP, A) JP-B-44-24357 (JP, B1) JP-B-60-51424 ( JP, B2) Tokiko 1-32789 (JP, B2) (58) Field surveyed (Int. Cl. 7 , DB name) B05D 7/14 B65D 8/16 B65D 25/34 B32B 15/08
Claims (7)
に、ほぼ表裏対応した位置関係にて、缶径相当の幅で且
つ１〜１０ｍｍの非塗装部を両側に残した形で、該鋼板
の長手方向に連続的且つストライプ状に熱硬化型有機塗
料を施し、加熱・乾燥後、この塗装ラインと同一ライン
内で、商標デザインが予め印刷され、最外面に潤滑層を
構成するトップコート層を備えた多層構造フィルムを、
該鋼板の缶外面相当面の該熱硬化型有機塗装面上に、該
鋼板の長手方向に連続的且つストライプ状に積層するこ
とを特徴とするコイルコーティングラインにおける３ピ
ース缶用有機積層鋼板の製造方法。The present invention relates to a continuously supplied coiled steel sheet having a width corresponding to a can diameter in a positional relationship substantially corresponding to the front and back sides.
1 to 10 mm of unpainted part on both sides
Apply the thermosetting organic paint continuously and in stripes in the longitudinal direction, and after heating and drying, the same line as this coating line
Inside, a trademark design is pre-printed and a lubrication layer is applied on the outermost surface.
A multilayer film with a top coat layer that constitutes
The steel sheet of the can outer surface corresponding surface of the heat-curable organic coating surface, the
A method for producing an organic laminated steel sheet for a three-piece can in a coil coating line, wherein the laminated steel sheet is continuously and longitudinally laminated in a longitudinal direction of the steel sheet.
に白色顔料を１〜３０重量％含有することを特徴とする
請求項１記載のコイルコーティングラインにおける３ピ
ース缶用有機積層鋼板の製造方法。2. The organic laminated steel sheet for a three-piece can in a coil coating line according to claim 1, wherein the thermosetting organic coating film applied to the outer surface of the can contains 1 to 30% by weight of a white pigment. Manufacturing method.
ルムが、熱硬化型接着剤／印刷インキ／飽和ポリエステ
ル樹脂／静摩擦係数０．２以下のトップコート層あるい
は飽和ポリエステル樹脂／印刷インキ／飽和ポリエステ
ル樹脂／静摩擦係数０．２以下のトップコート層の４層
構造を有することを特徴とする請求項１または２記載の
コイルコーティングラインにおける３ピース缶用有機積
層鋼板の製造方法。3. A multilayer structure film having a trademark design in advance is a thermosetting adhesive / printing ink / saturated polyester resin / top coat layer having a static friction coefficient of 0.2 or less or saturated polyester resin / printing ink / saturated polyester resin / according to claim 1 or 2 method for producing an organic laminated steel sheet for three-piece cans in the coil coating line wherein a has a four-layer structure of the static friction coefficient 0.2 or less of the top coat layer.
ルムが、飽和ポリエステル樹脂／印刷インキ／静摩擦係
数０．２以下のトップコート層の３層構造を有すること
を特徴とする請求項１記載のコイルコーティングライン
における３ピース缶用有機積層鋼板の製造方法。4. A multilayer structure film having a trademark design in advance is a saturated polyester resin / printing ink / static friction material.
The method for producing an organic laminated steel sheet for a three-piece can in a coil coating line according to claim 1, wherein the method has a three-layer structure of a top coat layer having a number of 0.2 or less .
むことを特徴とする請求項４記載のコイルコーティング
ラインにおける３ピース缶用有機積層鋼板の製造方法。5. The method for producing an organic laminated steel sheet for a three-piece can in a coil coating line according to claim 4, wherein a white pigment is contained in the saturated polyester resin.
硬化させずに多層構造フィルムを積層し、積層後の加熱
により下層の熱硬化型樹脂を完全硬化させることを特徴
とする請求項１記載のコイルコーティングラインにおけ
る３ピース缶用有機積層鋼板の製造方法。6. The method according to claim 1, further comprising laminating a multilayer structure film without completely curing the thermosetting resin to be applied in advance, and completely curing the lower thermosetting resin by heating after lamination. 2. A method for producing an organic laminated steel sheet for three-piece cans in the coil coating line according to 1.
に、缶径相当の幅で且つ１〜１０ｍｍの非塗装部を両側
に残した形で、該鋼板の長手方向に連続的且つストライ
プ状に熱硬化型有機塗料を施し、加熱・乾燥後、この塗
装ラインと同一ライン内で、商標デザインが予め印刷さ
れ、最外面に潤滑層を構成するトップコート層を備えた
多層構造フィルムを、該鋼板の熱硬化型有機塗膜面と反
対側の面上に、該熱硬化型有機塗膜面とほぼ表裏対応し
た位置関係にて、該鋼板の長手方向に連続的且つストラ
イプ状に積層することを特徴とするコイルコーティング
ラインにおける３ピース缶用有機積層鋼板の製造方法。7. An unpainted portion having a width equivalent to the can diameter and having a width of 1 to 10 mm is provided on one side of a continuously supplied coiled steel plate on both sides.
In the longitudinal direction of the steel sheet,
Subjected to thermosetting organic coating material to the looped, after heating and drying, the coated
In the same line as the mounting line, a trademark design is printed in advance, and a multilayer structure film provided with a top coat layer constituting a lubricating layer on the outermost surface is opposed to the thermosetting organic coating surface of the steel sheet.
A coil which is continuously and stripwise laminated in the longitudinal direction of the steel sheet on the opposite surface in a positional relationship substantially corresponding to the front and back surfaces of the thermosetting organic coating film surface. A method for producing an organic laminated steel sheet for a three-piece can in a coating line.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3113497A JP3060073B2 (en) | 1991-05-17 | 1991-05-17 | Method of manufacturing organic laminated steel sheet for three-piece can in coil coating line |
| AU16328/92A AU652630B2 (en) | 1991-05-17 | 1992-05-15 | Steel strip for three-piece can body, production process thereof and resistance seam welded three-piece can body |
| CA002068829A CA2068829C (en) | 1991-05-17 | 1992-05-15 | Steel strip for three-piece can body, production process thereof and resistance seam welded three-piece can body |
| DE69206499T DE69206499T2 (en) | 1991-05-17 | 1992-05-18 | Steel strip for a three-part can body, process for its manufacture and resistance-welded three-part can body. |
| EP92304458A EP0521606B1 (en) | 1991-05-17 | 1992-05-18 | Steel strip for three-piece can body, production process thereof and resistance seam welded three-piece can body |
| US08/463,465 US5820954A (en) | 1991-05-17 | 1995-06-05 | Steel strip for three-piece can body, production process thereof and resistance seam welded three-piece can body |
| US08/470,684 US5597436A (en) | 1991-05-17 | 1995-06-06 | Process for producing a print laminated steel strip used for the manufacture of a three-piece can body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3113497A JP3060073B2 (en) | 1991-05-17 | 1991-05-17 | Method of manufacturing organic laminated steel sheet for three-piece can in coil coating line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05111674A JPH05111674A (en) | 1993-05-07 |
| JP3060073B2 true JP3060073B2 (en) | 2000-07-04 |
Family
ID=14613817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3113497A Expired - Fee Related JP3060073B2 (en) | 1991-05-17 | 1991-05-17 | Method of manufacturing organic laminated steel sheet for three-piece can in coil coating line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3060073B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014061640A1 (en) | 2012-10-15 | 2014-04-24 | 新日鐵住金株式会社 | Steel sheet for container, and method for manufacturing same |
| US8753754B2 (en) | 2010-08-18 | 2014-06-17 | Nippon Steel & Sumitomo Metal Corporation | Steel sheet for can exhibiting excellent corrosion resistance |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026088A (en) * | 1999-05-12 | 2001-01-30 | Toray Ind Inc | Polyester film for three-piece metal can laminate |
| KR20010087838A (en) * | 2001-07-02 | 2001-09-26 | 정형동 | Method of manufacturing design tab using transcription techniques |
| JP5466900B2 (en) * | 2009-07-31 | 2014-04-09 | 株式会社特殊金属エクセル | Metal strip with coating film |
| JP5158267B2 (en) | 2010-03-25 | 2013-03-06 | 新日鐵住金株式会社 | Steel plate for containers with excellent corrosion resistance |
-
1991
- 1991-05-17 JP JP3113497A patent/JP3060073B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8753754B2 (en) | 2010-08-18 | 2014-06-17 | Nippon Steel & Sumitomo Metal Corporation | Steel sheet for can exhibiting excellent corrosion resistance |
| WO2014061640A1 (en) | 2012-10-15 | 2014-04-24 | 新日鐵住金株式会社 | Steel sheet for container, and method for manufacturing same |
| US9945037B2 (en) | 2012-10-15 | 2018-04-17 | Nippon Steel & Sumitomo Metal Corporation | Steel sheet used to manufacture a container and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05111674A (en) | 1993-05-07 |
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