JP4599795B2 - Laminate can weld repair tape and laminate can weld repair method - Google Patents
Laminate can weld repair tape and laminate can weld repair method Download PDFInfo
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Description
【０００１】
【発明の属する技術分野】
本発明は、ポリプロピレン樹脂を被覆したラミネート鋼板からなり、胴部、蓋部、底部で構成され、胴部が溶接によって接合されたラミネート缶の溶接部補修に使用される補修用樹脂テープ、及び前記補修用樹脂テープを用いたラミネート缶溶接部の補修方法に関する。詳しくは溶接するためにポリプロピレン樹脂が被覆されておらず鋼板面が露出した胴溶接部の腐食防止、金属溶出等の防止を目的として胴溶接部に被覆される補修用のテープ、及び前記補修用樹脂テープを用いたラミネート缶溶接部の補修方法に関するものである。
【０００２】
【従来の技術】
金属製溶接缶は、食品、非食品問わず保存容器として幅広い用途に使用されている。金属製溶接缶の缶材表面はそのままで用いられることは少なく、例えば塗料塗布やフィルムラミネートにより、缶内外面を錆、傷、汚れ等から保護するための処理が施されている。
【０００３】
例えば、ラミネート溶接缶では、まず鋼板に表面保護のためのラミネートを行い、所望のサイズに切断し、次いで切り出されたラミネート鋼板から溶接により円筒状の缶胴部を製造し、その後、缶胴上下に缶蓋を巻き締めて缶体を製造する。
【０００４】
ところが、上記製缶工程では、缶胴部の溶接後に、溶接部近傍にはフィルムがのっておらず、下地の鋼板面が露出した状態となってしまい、そのままの状態では缶内容物あるいは外気との接触により露出した鋼板部分が腐食してしまうという問題を有している。
【０００５】
現状では、上記問題に対して、腐食防止処理として、下記特許文献に示すような有機樹脂系補修材料を用いた補修が缶胴製造後に実施されている。
【０００６】
特許文献１では、缶胴用金属板の両端部と両端部間のラミネートされていない部分とを変性ポリオレフィン系樹脂粉体で溶融被覆して缶胴を形成する溶接缶が記載されている。
【０００７】
特許文献２では、溶接缶の側部内面溶接継目をカルボン酸濃度と曇り度を規定した変性オレフィン樹脂で覆う樹脂質被覆が設けられた溶接缶が記載されている。
【０００８】
【特許文献１】
特開昭６１−４７３４２号公報
【０００９】
【特許文献２】
特公昭６３−５０２６５号公報
【００１０】
【発明が解決しようとする課題】
しかしながら、いずれの技術も熱融着後の溶接部エッジでのテープ切断での切れ性は、十分ではない。通常、樹脂製のテープを缶胴溶接部に熱融着させて補修した場合、熱を受けて軟化した樹脂テープに張力をかけることにより、溶接部のエッジ部でテープを切断させる方式が取られる。このとき、樹脂テープの切れ性が不足すると、エッジ部でテープを切り損ね、テープが缶胴に残ったり、缶の外面に回り込んでしまうトラブルを発生させ、安定した製缶が行えない。また、溶接部の補修は、鋼板表面への密着力のみならず鋼板上に被覆したポリプロピレン樹脂への密着力も必要であるが、上記技術はいずれも、鋼板上に被覆したポリプロピレン樹脂への密着力が劣っている。
【００１１】
本発明は上記実情に鑑みなされたものであって、熱融着後のテープ切断での切れ性及び鋼板上に被覆したポリプロピレン樹脂への密着力に優れたラミネート缶溶接部補修テープ及びラミネート缶溶接部の補修方法を提供することを目的とする。
【００１２】
【課題を解決するための手段】
本発明者らは、上記課題を解決するために鋭意検討した結果、補修テープとして変性ポリオレフィンを用い、テープ厚みと弾性率を規定し、またはさらに、変性ポリオレフィン中の変性ポリプロピレンの比率を規定することにより、熱融着後のテープの切れ性が改善され、鋼板上に被覆したポリプロピレン樹脂への密着力も向上することを見いだし、本発明に至った。すなわち、本発明は以下を特徴とする。
【００１３】
［１］鋼板の少なくとも缶内面となる面にポリプロピレンを主体とする樹脂を被覆したラミネート鋼板からなるラミネート缶の缶胴溶接部内面を補修する補修テープであって、前記補修テープは、厚みが２０〜２００μｍであり、かつ、９０℃における弾性率が２．０×１０ ８ （ｄｙｎｅ／ｃｍ 2 ）以上１．０×１０9（ｄｙｎｅ／ｃｍ2）以下、Ｔピール強度が１．５ｋｇｆ／５ｍｍ以上の熱可塑性変性ポリオレフィン樹脂であり、さらに、該熱可塑性変性ポリオレフィン樹脂中の変性ポリプロピレンの比率が５０％以上であることを特徴とするラミネート缶溶接部補修テープ。
【００１５】
［２］上記［１］に記載の補修テープを用いてラミネート缶溶接部を被覆し、次いで補修テープが被覆された前記溶接部を熱融着することを特徴とするラミネート缶溶接部の補修方法。
【００１６】
【発明の実施の形態】
以下、本発明を詳細に説明する。
【００１７】
本発明の補修テープを構成する熱可塑性変性ポリオレフィン樹脂としては、不飽和カルボン酸及び／又はその誘導体で変性することで接着性（熱接着性）を付与したものが好ましい。この変性に使用する不飽和カルボン酸又はその誘導体としては、マレイン酸、アクリル酸、フマール酸、テトラヒドロフタル酸、イタコン酸、シトラコン酸、クロトン酸、ナジック酸などの不飽和カルボン酸又はその誘導体、例えば、アミド、イミド、無水物、エステル、酸ハライドなどが挙げられ、これらの１種又は２種以上を用いることができるが、無水マレイン酸を用いるのが一般的である。変性ポリオレフィン樹脂を用いない場合、鋼板との密着力が不足するだけでなく、熱軟化性も劣るため切れ性を確保するのも困難であるため、本発明において、補修テープとして用いるポリオレフィン樹脂は上述のような変性ポリオレフィン樹脂とする。
【００１８】
さらに、変性ポリオレフィン中の変性ポリプロピレンの比率は５０％以上が好ましい。変性ポリプロピレンの比率が５０％未満では、鋼板上に被覆したポリプロピレンラミネート樹脂との相溶性が低くなるため、テープとラミネート樹脂との間の密着力が不足する場合がある。
【００１９】
本発明のテープを構成する変性ポリオレフィン樹脂の９０℃における弾性率は１．０×１０9（ｄｙｎｅ／ｃｍ2）以下とする。９０℃における弾性率が１．０×１０9（ｄｙｎｅ／ｃｍ2）超えでは、熱融着後のテープ切断での切れ性が劣ってしまう。
【００２０】
さらに、本発明のテープを構成するポリエステル樹脂は、上記弾性率を有するとともに、厚みを２０〜２００μｍとする。厚みが２０μｍ未満では、補修すべき溶接部段差での被覆性が確保できない。一方、２００μｍ超えでも、厚くなることで切れにくくなるばかりか、いたずらにコスト高を招くだけである。
【００２１】
本発明のラミネート缶溶接部補修テープは、上記で構成されるものであれば、単層構造であっても、積層構造であってもよい。
【００２２】
さらに、本発明の補修テープは、本発明の要旨を越えない限り、その製造法については特に限定されない。一般的には、キャスティングドラム法、インフレーション法等が挙げられる。
【００２３】
そして、ラミネート缶溶接部の補修は、上記補修テープでラミネート缶溶接部を被覆し、完全に溶接部を覆うように溶接部に上記補修テープを熱融着させて行う。ラミネート缶溶接部に補修テープを熱融着させる際の溶接部加熱方法としては、高周波誘導加熱、赤外線照射、直火加熱、熱風吹付加熱、加熱ローラとの接触等の局所的な加熱方法や、熱風炉、オーブン等の全体加熱を行う方法がある。
【００２４】
補修テープでラミネート缶溶接部に圧着する方法としては、ラミネート缶を連続して走行させ、ラミネート缶のスチール露出面と接触するアプリケータロールに補修テープを供給して行う方法などがある。
【００２５】
本発明の溶接部を補修テープにより補修する対象となるラミネート缶とは、少なくとも片面（缶内面となる面）にポリプロピレンを主体とする樹脂を被覆したラミネート鋼板を素材として、胴部、蓋部、底部で構成され、溶接により缶胴部が製造されるものである。
【００２６】
また、本発明のラミネート缶の素材種類には特に制限はなく、一般的に製缶に供される金属材料であれば構わず、例えば、ブリキ、ＴＦＳ（チンフリースチール）等が挙げられる。そして、ラミネート缶の溶接方法に関しても特に制限はなく、従来用いられている方法で構わない。ただし、ここで言う溶接とは、溶接後に缶材の露出があり、補修を必要とするものである。また、缶胴を接着剤により貼り合わせる缶であっても、缶材の露出がある場合は本発明の補修テープを使用することができる。
【００２７】
【実施例】
本発明に該当する補修テープの実施例及び本発明に該当しない補修テープの比較例を、表１に示す。
（１）密着性試験（Ｔピール強度測定）方法
板厚０．３２ｍｍのＴＦＳとポリプロピレンラミネート鋼板の各々のサンプルを５ｍｍ幅×１００ｍｍ長に剪断し、ＴＦＳとポリプロピレンラミネート鋼板の間に５ｍｍ幅×５０ｍｍ長の補修テープを挟んで、２００℃で加熱融着させ、試験片とした。テープを挟んでいない部分を外側に９０°づつ開き、Ｔ字様の形状にしたのち、開いた両端を引っ張り試験機に固定し、引っ張り試験を行い、テープ熱融着部分の剥離強度を測定した。この試験により、補修テープと、ラミネート鋼板下地のＴＦＳ、およびポリプロピレンラミネート樹脂、両方との密着力を評価できる。缶胴の補修テープ部分がラミネート缶蓋に巻き締められた際の気密性において、実用上問題のない剥離強度として、１．０ｋｇｆ以上が必要である。また、危険物など、気密性に対してより厳しい用途に対しては１．５ｋｇｆ以上あることが望ましい。これらの値をＴピール強度の判断基準とした。
（２）弾性率測定方法
表１に示す補修テープそのものを、動的粘弾性測定装置（オリエンテック社製：バイブロン）を用いて測定した。
【００２８】
具体的な測定法としては、以下の通りである。
【００２９】
○テープサイズ：幅３ｍｍ×長さ５０ｍｍ
○プリロード荷重 ：５．０ｇ
○加振モード ：単一波形
○加振振幅 ：１６μｍ
○加振周波数 ：１１０Ｈｚ
（３）切れ性評価
実製缶ラインで、ポリプロピレン樹脂ラミネート溶接缶の溶接部内面に、表１に記載のテープを用いて実際に補修を行った。缶胴エッジにおける補修テープの切れ方を以下の基準で評価した。
○‥１０００缶の連続補修中、切れの不良が認められた缶が０缶であった。
△‥１０００缶の連続補修中、切れの不良が認められた缶が１〜２缶であった。
×‥１０００缶の連続補修中、切れの不良が認められた缶が３缶以上であった。
（△以上であれば実用は可能である）
得られた結果を表１に示す
【００３０】
【表１】
表１より、本発明例では、切れ性に優れ、かつＴピール強度すなわち密着性にも優れていることがわかる。
【００３２】
一方、比較例では、Ｔピール強度が劣っている。
【００３３】
【発明の効果】
以上、本発明によれば、高度の耐食性を要求される内容物に対して、缶内面に塗装を施された缶の代替として、本発明のラミネート缶を使用することが可能となる。また、缶内面側の塗装を省略でき、▲１▼缶コストの低減▲２▼塗装焼付け時に発生するＳＯX、ＮＯXの低減▲３▼塗装工程での熱源および廃液の低減を図ることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention consists of a laminated steel sheet coated with polypropylene resin, and is composed of a body part, a lid part, and a bottom part, and is used for repairing a welded part of a laminated can in which the body part is joined by welding, and the above-mentioned The present invention relates to a repair method of a welded portion of a laminated can using a repairing resin tape. Specifically, for the purpose of preventing the corrosion of the barrel welded portion where the steel plate surface is exposed without being coated with polypropylene resin for welding, and for the purpose of preventing metal elution, etc., the repair tape covered with the barrel welded portion, and the above-mentioned repair The present invention relates to a method for repairing a welded portion of a laminated can using a resin tape.
[0002]
[Prior art]
Metal welded cans are used in a wide range of applications as storage containers regardless of food or non-food. The surface of the can material of a metal welded can is rarely used as it is, and a treatment for protecting the inner and outer surfaces of the can from rust, scratches, dirt, and the like is performed, for example, by coating or film lamination.
[0003]
For example, in a laminated welded can, a steel plate is first laminated for surface protection, cut to a desired size, and then a cylindrical can body is manufactured from the cut laminated steel plate by welding. A can body is manufactured by winding a can lid around the body.
[0004]
However, in the can manufacturing process, after welding of the can barrel portion, not riding the film in the weld vicinity, becomes a state where the steel sheet surface of the base is exposed, the intact cans contents or the outside air There is a problem that the exposed steel plate portion is corroded by contact with the steel plate.
[0005]
At present, for the above problem, as an anti-corrosion treatment, repair using an organic resin-based repair material as shown in the following patent document is performed after manufacturing the can body.
[0006]
Patent Document 1 describes a welded can in which a can body is formed by melt-coating both ends of a metal plate for a can body and a non-laminated portion between both ends with a modified polyolefin resin powder.
[0007]
Patent Document 2 describes a welding can provided with a resinous coating in which a side inner surface weld seam of a welding can is covered with a modified olefin resin that defines carboxylic acid concentration and haze.
[0008]
[Patent Document 1]
JP-A 61-47342 [0009]
[Patent Document 2]
Japanese Patent Publication No. 63-50265 [0010]
[Problems to be solved by the invention]
However, in any of the techniques, the cutting property at the time of tape cutting at the welded portion edge after heat fusion is not sufficient. Normally, when a resin tape is repaired by heat-sealing to a can body welding part, a method of cutting the tape at the edge part of the welded part is applied by applying tension to the softened resin tape by receiving heat. . At this time, if the cutting property of the resin tape is insufficient, the tape is broken at the edge portion, causing trouble that the tape remains in the can body or wraps around the outer surface of the can, and stable can making cannot be performed. In addition, repair of welds requires not only adhesion to the steel sheet surface but also adhesion to the polypropylene resin coated on the steel sheet, but all of the above techniques are to adhere to the polypropylene resin coated on the steel sheet. Is inferior.
[0011]
The present invention has been made in view of the above circumstances, and is capable of repairing a laminated can weld portion and a laminate can welded, which are excellent in cutting performance after tape fusion after heat sealing and adhesion to polypropylene resin coated on a steel plate. The purpose is to provide repair methods for the department.
[0012]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors use a modified polyolefin as a repair tape, specify the tape thickness and elastic modulus, or further specify the ratio of the modified polypropylene in the modified polyolefin. As a result, it was found that the tape cutting property after heat-sealing was improved, and the adhesion to the polypropylene resin coated on the steel plate was also improved, leading to the present invention. That is, the present invention is characterized by the following.
[0013]
[1] A repair tape for repairing the inner surface of a welded portion of a can body of a laminated can made of a laminated steel plate in which at least the inner surface of the steel plate is coated with a resin mainly composed of polypropylene. The repair tape has a thickness of 20 And an elastic modulus at 90 ° C. of 2.0 × 10 8 (dyne / cm 2 ) or more and 1.0 × 10 9 (dyne / cm 2 ) or less , and a T peel strength of 1.5 kgf / 5 mm or more. A laminated can welded part repair tape, wherein the ratio of the modified polypropylene in the thermoplastic modified polyolefin resin is 50% or more.
[0015]
[ 2 ] A method for repairing a laminated can welded portion, wherein the welded portion of the laminated can is covered with the repair tape according to [1], and then the welded portion covered with the repair tape is heat-sealed. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
[0017]
The thermoplastic modified polyolefin resin constituting the repair tape of the present invention is preferably one that has been imparted with adhesiveness (thermal adhesiveness) by modification with an unsaturated carboxylic acid and / or derivative thereof. Examples of unsaturated carboxylic acids or derivatives thereof used for this modification include unsaturated carboxylic acids or derivatives thereof such as maleic acid, acrylic acid, fumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, nadic acid, etc. , amides, imides, anhydrides, esters, such as acid halides and the like, may be used alone or in combination of two or more of these, Ru general der to use maleic anhydride. Without the denaturation polyolefin resin, not only insufficient adhesion to the steel sheet, since it is difficult to secure a property off for inferior heat-softenable, in the present invention, the polyolefin resin used as repair tape The modified polyolefin resin as described above is used.
[0018]
Furthermore, the ratio of the modified polypropylene in the modified polyolefin is preferably 50% or more. If the ratio of the modified polypropylene is less than 50%, the compatibility with the polypropylene laminate resin coated on the steel sheet is low, and the adhesion between the tape and the laminate resin may be insufficient.
[0019]
The elastic modulus at 90 ° C. of the modified polyolefin resin constituting the tape of the present invention is 1.0 × 10 9 (dyne / cm 2 ) or less. When the elastic modulus at 90 ° C. exceeds 1.0 × 10 9 (dyne / cm 2 ), the cutting property after cutting by heat after heat fusion is poor.
[0020]
Furthermore, the polyester resin constituting the tape of the present invention has the above elastic modulus and a thickness of 20 to 200 μm. If the thickness is less than 20 μm, it is not possible to ensure the coverage at the welded portion step to be repaired. On the other hand, even if it exceeds 200 μm, it becomes hard to be cut by being thick, and it only incurs a high cost.
[0021]
The laminated can welded portion repair tape of the present invention may have a single layer structure or a laminated structure as long as it is configured as described above.
[0022]
Furthermore, the repair tape of the present invention is not particularly limited as to its production method as long as it does not exceed the gist of the present invention. Generally, a casting drum method, an inflation method, etc. are mentioned.
[0023]
Then, the repair of the laminated can welded portion is performed by covering the laminated can welded portion with the repair tape and thermally fusing the repair tape to the welded portion so as to completely cover the welded portion. As a welding part heating method when heat-sealing the repair tape to the laminate can weld part, high-frequency induction heating, infrared irradiation, direct fire heating, hot air blowing additional heat, local heating methods such as contact with a heating roller, There is a method of heating the whole of a hot stove, an oven or the like.
[0024]
As a method of pressure-bonding to the welded portion of the laminate can with the repair tape, there is a method of running the laminate can continuously and supplying the repair tape to the applicator roll that contacts the exposed steel surface of the laminate can.
[0025]
The laminated can which is a target for repairing the welded portion of the present invention with a repair tape is a laminate steel plate coated with a resin mainly composed of polypropylene on at least one side (surface which becomes the inner surface of the can). It consists of a bottom part, and a can body part is manufactured by welding.
[0026]
Moreover, there is no restriction | limiting in particular in the raw material kind of the laminated can of this invention, What is necessary is just a metal material generally used for can-making, for example, tin, TFS (chin free steel), etc. are mentioned. And there is no restriction | limiting in particular also about the welding method of a laminated can, The method used conventionally may be used. However, the term “welding” as used herein means that the can material is exposed after welding and needs repair. Further, even if the can body is bonded with an adhesive, the repair tape of the present invention can be used if the can material is exposed.
[0027]
【Example】
Table 1 shows examples of repair tapes corresponding to the present invention and comparative examples of repair tapes not corresponding to the present invention.
(1) Adhesion test (T peel strength measurement) method Each sample of TFS with a plate thickness of 0.32 mm and a polypropylene laminated steel plate was sheared to a length of 5 mm × 100 mm, and a width of 5 mm × 50 mm between the TFS and the polypropylene laminated steel plate. A test piece was obtained by heat-sealing at 200 ° C. with a long repair tape. After opening the part not sandwiching the tape 90 ° outward and making it T-shaped, both ends opened were fixed to a tensile tester, a tensile test was performed, and the peel strength of the tape heat-bonded part was measured. . By this test, the adhesive force between the repair tape, the TFS of the laminated steel sheet base, and the polypropylene laminated resin can be evaluated. In airtightness when the repair tape portion of the can body is wound around the laminated can lid, a peel strength of 1.0 kgf or more is necessary as a practically no problem. Moreover, it is desirable that it is 1.5 kgf or more for applications that are more strict with respect to airtightness such as dangerous materials. These values were used as criteria for determining the T peel strength.
(2) Elastic modulus measurement method The repair tape itself shown in Table 1 was measured using a dynamic viscoelasticity measuring device (Orientec Co., Ltd .: Vibron).
[0028]
Specific measurement methods are as follows.
[0029]
○ Tape size: width 3mm x length 50mm
○ Preload load: 5.0g
○ Excitation mode: Single waveform ○ Excitation amplitude: 16μm
○ Excitation frequency: 110Hz
(3) Evaluation of cutting performance In the actual can line, the inner surface of the welded portion of the polypropylene resin laminate welded can was actually repaired using the tape shown in Table 1. The method of cutting the repair tape at the can barrel edge was evaluated according to the following criteria.
○ During the continuous repair of 1000 cans, 0 cans were found to be defective.
Δ: During continuous repair of 1000 cans, 1 to 2 cans were found to be defective.
X ... During continuous repair of 1000 cans, 3 or more cans were found to be defective.
(If it is more than Δ, it can be used practically)
The results obtained are shown in Table 1.
[Table 1]
From Table 1, it can be seen that in the present invention example, the cutting performance is excellent and the T peel strength, that is, the adhesiveness is also excellent.
[0032]
On the other hand, in the comparative example, the T peel strength is inferior.
[0033]
【The invention's effect】
As described above, according to the present invention, the laminated can of the present invention can be used as an alternative to a can whose inner surface is coated with respect to contents that require a high degree of corrosion resistance. Also, painting on the inner surface of the can can be omitted, and (1) reduction of can cost, (2) reduction of SO x and NO x generated during baking, and (3) reduction of heat source and waste liquid in the painting process. .
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002364658A JP4599795B2 (en) | 2002-12-17 | 2002-12-17 | Laminate can weld repair tape and laminate can weld repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002364658A JP4599795B2 (en) | 2002-12-17 | 2002-12-17 | Laminate can weld repair tape and laminate can weld repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004195483A JP2004195483A (en) | 2004-07-15 |
| JP4599795B2 true JP4599795B2 (en) | 2010-12-15 |
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| JP2002364658A Expired - Lifetime JP4599795B2 (en) | 2002-12-17 | 2002-12-17 | Laminate can weld repair tape and laminate can weld repair method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7670094B2 (en) * | 2004-01-15 | 2010-03-02 | Crebocan Ag | Method and device for producing a can body and can body |
| JP4631039B1 (en) * | 2009-11-05 | 2011-02-23 | 三興製罐株式会社 | Top plate for metal can, correction method and correction device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59146841A (en) * | 1983-02-14 | 1984-08-22 | 日本鋼管株式会社 | Method and device for manufacturing laminated metallic material |
| JPH09108752A (en) * | 1995-10-13 | 1997-04-28 | Dainichi Seikan Kk | Repairing of inner surface of welded seam of metal can body |
| JP2000248373A (en) * | 1999-02-26 | 2000-09-12 | Nkk Corp | Laminated steel sheet for non-polished welded can |
| JP2001031926A (en) * | 1999-07-19 | 2001-02-06 | Mitsubishi Plastics Ind Ltd | Resin material for covering seam of a resin-coated can |
| JP2001270029A (en) * | 2000-03-23 | 2001-10-02 | Mitsubishi Plastics Ind Ltd | Film laminated steel sheet and container made of film laminated steel sheet |
-
2002
- 2002-12-17 JP JP2002364658A patent/JP4599795B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59146841A (en) * | 1983-02-14 | 1984-08-22 | 日本鋼管株式会社 | Method and device for manufacturing laminated metallic material |
| JPH09108752A (en) * | 1995-10-13 | 1997-04-28 | Dainichi Seikan Kk | Repairing of inner surface of welded seam of metal can body |
| JP2000248373A (en) * | 1999-02-26 | 2000-09-12 | Nkk Corp | Laminated steel sheet for non-polished welded can |
| JP2001031926A (en) * | 1999-07-19 | 2001-02-06 | Mitsubishi Plastics Ind Ltd | Resin material for covering seam of a resin-coated can |
| JP2001270029A (en) * | 2000-03-23 | 2001-10-02 | Mitsubishi Plastics Ind Ltd | Film laminated steel sheet and container made of film laminated steel sheet |
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|---|---|
| JP2004195483A (en) | 2004-07-15 |
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