JPS63317457A - Can end material - Google Patents
Can end materialInfo
- Publication number
- JPS63317457A JPS63317457A JP14802087A JP14802087A JPS63317457A JP S63317457 A JPS63317457 A JP S63317457A JP 14802087 A JP14802087 A JP 14802087A JP 14802087 A JP14802087 A JP 14802087A JP S63317457 A JPS63317457 A JP S63317457A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- end material
- aluminum alloy
- core material
- content
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 53
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 18
- 239000011162 core material Substances 0.000 abstract description 16
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 238000005253 cladding Methods 0.000 abstract description 8
- 150000003839 salts Chemical class 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 3
- 230000007797 corrosion Effects 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 18
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000956 alloy Substances 0.000 description 5
- 235000013305 food Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 235000014171 carbonated beverage Nutrition 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910018134 Al-Mg Inorganic materials 0.000 description 2
- 229910018467 Al—Mg Inorganic materials 0.000 description 2
- 101150110330 CRAT gene Proteins 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005029 tin-free steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 241001291279 Solanum galapagense Species 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 235000011496 sports drink Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- 235000015193 tomato juice Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は食品容器用アルミニウム材に関し、さらに詳し
くは、腐食性の激しい内容物に対して耐孔食性に優れた
、飲料や食品の８塁用材、特に缶エンド材として好適な
アルミニウム材に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an aluminum material for food containers, and more particularly, to an aluminum material for beverages and foods that has excellent pitting corrosion resistance against highly corrosive contents. The present invention relates to an aluminum material suitable for can end materials, especially can end materials.
（従来の技術）
一般的にアルミニウムあるいはアルミニウム合金は、表
面に保護力の強い酸化皮膜を形成し、実用−Ｌ優れた耐
食性を示すために、日用品や建材等の分野に幅広く使用
されている。(Prior Art) In general, aluminum or aluminum alloys form a highly protective oxide film on the surface and exhibit excellent corrosion resistance in practical use, and are therefore widely used in fields such as daily necessities and building materials.
また、アルミニウムあるいはアルミニウム合金は、耐食
性が優れているほかに、軽量で、かつ、成形性に優れ、
さらには、その腐食生成物は無害であるという特色を有
しており、近年になって、ビール、炭酸飲料、果汁等の
清涼飲料や缶詰等の食品容器の素材としても有用性が認
められ、その使用量は年々増加する傾向にある。In addition, aluminum or aluminum alloys have excellent corrosion resistance, are lightweight, and have excellent formability.
Furthermore, its corrosion products have the characteristic of being harmless, and in recent years, their usefulness has been recognized as a material for soft drinks such as beer, carbonated drinks, fruit juices, and food containers such as canned food. Its usage tends to increase year by year.
従来、上記の内容物に対する缶容器としてはオールスチ
ール製のいわゆるスリーピース缶が多く用いられている
。これは第２図に示したようにスチール製のエンド（１
）、ボディ（２）、ボトム（３）＃Ｊとからなっている
。Conventionally, all-steel so-called three-piece cans have been widely used as containers for the above-mentioned contents. This is a steel end (1) as shown in Figure 2.
), body (2), and bottom (3) #J.
しかしながら蓋（缶エンド）については、蓋の表面に行
わなければならない種々な加工（イージーオープンのタ
ブの取付のためのリベット加工、スコア加工など）のし
やすさ、開口性、開口部の切り口の安全性などを考慮し
、スチール板にかわるアルミニウム板の採用が望まれて
いる。However, when it comes to lids (can ends), the ease with which various processes must be performed on the surface of the lid (riveting for attaching easy-open tabs, scoring, etc.), opening performance, and the cut of the opening are important. For reasons such as safety, it is desirable to use aluminum plates instead of steel plates.
ビール等の炭酸飲料、腐食性の弱いジュース。Carbonated drinks such as beer, less corrosive juices.
コーヒー等には、スチール系の缶ボディに対し。For coffee, etc., use steel can bodies.
缶エンド材として、ＪＩＳ ５０５２に代表されるＡ
ｌ−Ｍｇ合金又はＪＩＳ ３００４等のＡｉＬ−Ｍｇ
−Ｍｎ合金が使用され、また特に深絞り性が要求される
キャップ材には純アルミニウム系合金が一般的に使用さ
れ、通常は塗装してから実用に供される。As a can end material, A represented by JIS 5052
l-Mg alloy or AiL-Mg such as JIS 3004
-Mn alloys are used, and pure aluminum alloys are generally used for cap materials that particularly require deep drawability, and are usually put into practical use after being painted.
（発明が解決しようとする問題点）
しかしながら、この種飲料食品用のアルミニウム合金は
、成形性に優れ、耐食性も比較的良好であるが、内容物
中のＣｌイオンが数百ｐｐ■と多く、腐食性の激しい内
容物の場合（例えば、トマトジュース、スポーツドリン
ク、スープ等）においては、アルミニウム合金の保護酸
化皮膜は容易に破壊され、局部的な溶解か生じて孔食と
なり、容器として致命的な°バ故につながる可能性があ
るので、その用途は自ら制限されていた。(Problems to be Solved by the Invention) However, although this type of aluminum alloy for beverages and foods has excellent formability and relatively good corrosion resistance, the content contains as much as several hundred pp■ of Cl ions. In the case of highly corrosive contents (e.g. tomato juice, sports drinks, soups, etc.), the protective oxide film on the aluminum alloy is easily destroyed, resulting in localized melting and pitting corrosion, which can be fatal to the container. Its use was self-limited because it could lead to serious damage.
また缶エンドとしてアルミニウムあるいはアルミニウム
合金を使用し、胴体はブリキ、ＴＦＳ、スチール等アル
ミニウムあるいはアルミニウム合金より電気化学的に青
な材料を用いる場合には、内容物自体の腐食作用の他に
ガルバニック作用が付加されるため、アルミニウムある
いはアルミニウム合金の材料に発生する孔食の進行速度
は増大されるところとなり、内容物によるアルミニウム
あるいはアルミニウム合金の材料の用途制限はさらに厳
しくなっていた。In addition, when aluminum or aluminum alloy is used for the can end and the body is made of a material that is electrochemically bluer than aluminum or aluminum alloy, such as tinplate, TFS, or steel, galvanic action occurs in addition to the corrosive action of the contents themselves. As a result, the rate of pitting corrosion that occurs in aluminum or aluminum alloy materials is increased, and restrictions on the use of aluminum or aluminum alloy materials due to the contents have become even more severe.
本発明の目的は缶エンド材として要求される強度、成形
性を具備するとともに、腐食面積の拡大を防止し、深い
孔食が生じないようにした缶エンド材を得ることにある
。An object of the present invention is to obtain a can end material that has the strength and formability required for a can end material, prevents expansion of the corroded area, and prevents deep pitting corrosion.
（問題点を解決するための手段）
すなわち本発明は、
（１） Ｓ ｉ ０．０５〜０．１５重量％（以下重
量％を単に％と記す） 、 Ｃｕ ０．２〜０．７％、
Ｍｎ ０．５〜１．４％を含有し、残部がＡｌ及び不可
避不純物であるアルミニウム合金からなることを特徴と
する缶エンド材（以下第１発明という）及び（２）Ｓ
ｉ ０．０５〜０．１５％、Ｃｕ ０．２〜０．７％
、Ｍｎ、０．５〜１．４％を含有し、残部が／Ｍｌ及び
不可避不純物であるアルミニウム合金の芯材に、Ａｌｌ
純度９９．０％以上で残部が不可避不純物であるアルミ
ニウムをクラットしてなることを特徴とする缶エンド材
（・以下第２発明という）を提供するものである。(Means for Solving the Problems) That is, the present invention includes (1) Si 0.05 to 0.15% by weight (hereinafter, weight% is simply referred to as %), Cu 0.2 to 0.7%,
A can end material (hereinafter referred to as the first invention) characterized by comprising an aluminum alloy containing 0.5 to 1.4% Mn and the remainder being Al and inevitable impurities; and (2) S
i 0.05-0.15%, Cu 0.2-0.7%
, Mn, 0.5 to 1.4%, and the balance is /Ml and inevitable impurities.
The present invention provides a can end material (hereinafter referred to as the second invention) characterized in that it is made by cratting aluminum with a purity of 99.0% or more and the remainder being unavoidable impurities.
第１発明の缶エンド材及び第２発明における芯材のアル
ミニウム合金中容成分の限定理由は次の通りである。The reasons for limiting the aluminum alloy contents of the can end material of the first invention and the core material of the second invention are as follows.
第１発明の缶エンド材中及び第２発明の芯材中のＣｕ含
有量は０．２〜０．７％とする。Ｃｕはアルミニウム合
金を電気化学的に貴とする効果があり、含有量か０．２
％未満ではこの効果は小さく、また０、７％を越えて含
有されると粒界腐食感受性が増大するので好ましくない
。The Cu content in the can end material of the first invention and the core material of the second invention is 0.2 to 0.7%. Cu has the effect of making aluminum alloy electrochemically noble, and the content is 0.2
If the content is less than 0.7%, this effect will be small, and if the content exceeds 0.7%, susceptibility to intergranular corrosion will increase, which is not preferable.
第１発明の缶エンド材中及び第２発明の芯材中のＭｎｎ
含有性０．５〜１．４％とする。Ｍｎはアルミニウム合
金を電気化学的に責とし、さらに耐食性を向上させると
共に強度を高める元素であり、炭酸飲料等のような内圧
が加わる内容物に対してはＡｌ−Ｍｇ合金、Ａｌ−Ｍｇ
−Ｍｎ合金が容器用材料として使用され、また、魚類等
の缶詰等については充填後、１００℃以上の高温て殺菌
する際に容器内の圧力が上昇するので、容器部材として
はある程度の強度が必要であり、Ｍｎｎ有力量０．５％
未満では所望の効果が得られず、また１、４％を越える
多量の含有は粗大な金属間化合物を生成し、厳しい成形
において逆に欠陥の原因となる。Mnn in the can end material of the first invention and the core material of the second invention
The content should be 0.5 to 1.4%. Mn is an element that electrochemically affects aluminum alloys and further improves corrosion resistance and strength.For contents that are subject to internal pressure, such as carbonated drinks, it is necessary to use Al-Mg alloys and Al-Mg alloys.
- Mn alloy is used as a material for containers, and when canned fish etc. are sterilized at high temperatures of 100°C or higher after filling, the pressure inside the container increases, so the container material has a certain degree of strength. Necessary, Mnn potential amount 0.5%
If the content is less than 1.4%, the desired effect cannot be obtained, and if the content exceeds 1.4%, coarse intermetallic compounds are formed, which may cause defects in severe molding.
第１発明の缶エンド材中及び第２発明の芯材中のＳｉ含
有量は０．０５〜０．１５％とする。The Si content in the can end material of the first invention and the core material of the second invention is 0.05 to 0.15%.
Ｓｉはアルミニウム合金を電気化学的に責にする効果を
有するが、Ｓｉ含有量か０．ＯＳ％未満では所望の効果
が得られず、また０、１５％を越えて含有されると逆に
アルミニウム合金を電気化学的に卑にする。Si has the effect of damaging aluminum alloys electrochemically, but if the Si content is 0. If the content is less than OS%, the desired effect cannot be obtained, and if the content exceeds 0.15%, the aluminum alloy becomes electrochemically base.
これらの含有成分以外に、Ｔｉ等の鋳造組織を微細化す
る元素を含有させることが可能である。In addition to these components, it is possible to contain an element that refines the casting structure, such as Ti.
なお、Ｆｅは不可避不純物として含有されることがあり
、含有量は０．３％程度まては本発明の缶エンド材の所
期の目的を阻害することがないので許容されるが、少な
い程望ましい元素である。Note that Fe may be contained as an unavoidable impurity, and a content of about 0.3% is permissible as it does not impede the intended purpose of the can end material of the present invention, but the lower the content, the better. It is a desirable element.
次に第２発明において缶エンド材のクラッド層にＡ９．
純度９９．０％以上のアルミニウムを用いる。純度９９
．０％以上のアルミニウムを皮材としてクラッドする理
由は、塗装のピンホール、又は製缶時のキズなと塗膜欠
陥部より発生する缶エンド材の孔食発生ならびに孔食成
長速度を電気化学的に防止及び低下させるためである。Next, in the second invention, A9.
Aluminum with a purity of 99.0% or higher is used. Purity 99
．． The reason for using 0% or more aluminum as a cladding material is to electrochemically evaluate the occurrence of pitting corrosion in can end materials that occurs from paint pinholes, scratches during can manufacturing, and paint film defects, as well as the growth rate of pitting corrosion. This is to prevent and reduce the
すなわち９９．０％以上のアルミニウムは芯材に比して
犠牲陽極となるため、塗膜欠陥部のアルミニウム材が塩
素イオンを含む缶内容物と接して発生する孔食を起りに
くくすると同時に孔食が発生した場合てもその孔食成長
速度を遅くする効果を有する。In other words, since 99.0% or more of aluminum acts as a sacrificial anode compared to the core material, it makes it difficult for the aluminum material in the defective part of the paint film to suffer pitting corrosion that occurs when it comes into contact with the contents of the can containing chlorine ions, and at the same time prevents pitting corrosion. Even if pitting corrosion occurs, it has the effect of slowing down the growth rate of pitting corrosion.
未発ＩＪの缶エンド材の製造は、常法に従って行うこと
ができる。一般にこうして得られた缶エンド材の表面及
び合せ材のクラッド層の表面に樹脂を熱圧着等でラミネ
ートしたりエポキシ系樹脂、ビニル系樹脂等の塗料を塗
布したりして缶エンドを形成するのか好ましいが、樹脂
皮膜を施さずにそのまま使用してもよい、樹脂皮膜をコ
ーティングする場合は予めクロム等の化成皮膜を施すの
が好ましい。The can end material for unexploded IJ can be produced according to a conventional method. In general, can ends are formed by laminating resin on the surface of the can end material obtained in this way and on the surface of the cladding layer of the laminating material by thermocompression bonding, etc., or by applying paint such as epoxy resin or vinyl resin. Although it is preferable, it may be used as it is without applying a resin film. When coating with a resin film, it is preferable to apply a chemical conversion film such as chromium in advance.
本発明の第２発明において、芯材に対する皮材のクラッ
ト率は特に制限はないが、通常２〜２０％、好ましくは
５〜１５％の範囲である。また樹脂皮膜の厚さは好まし
くは４〜２０４ｍの範囲であるかこれに限定されるもの
ではない。In the second aspect of the present invention, the crat ratio of the skin material to the core material is not particularly limited, but is usually in the range of 2 to 20%, preferably 5 to 15%. Further, the thickness of the resin film is preferably in the range of 4 to 204 m, but is not limited thereto.
また本発明の第２発明において、クラット層は芯材の片
面もしくは両面に設けられる。Furthermore, in the second aspect of the present invention, the crat layer is provided on one or both sides of the core material.
本発明のアルミニウム缶エンド材は、缶エンドとして、
缶ボディ材の種類に制限なく使用できるが、特に缶ボデ
ィ材がスチール板の場合に使用するのに適している。こ
のようにして、第２発明の缶エンド材を用いて缶容器と
した場合を第１図の要部拡大図に示す、同図中（７）は
本発明の缶エンド材、（７ａ）は芯材、（７ｂ）はクラ
ッド層、（７ｃ）は樹脂皮膜である。また（８）は缶エ
ンド上に形成した開は口のスコア（刻み線）であり、（
９）はティンフリースチール板（９ａ）に樹脂（９Ｃ）
をコーティングした缶ボディである。The aluminum can end material of the present invention can be used as a can end.
Although it can be used with any type of can body material, it is particularly suitable for use when the can body material is a steel plate. In this way, the case where a can container is made using the can end material of the second invention is shown in the enlarged view of the main part of FIG. 1, in which (7) is the can end material of the present invention, and (7a) is A core material, (7b) a cladding layer, and (7c) a resin film. Also, in (8), the opening formed on the can end is the mouth score (scorched line), and (
9) is resin (9C) on tin-free steel plate (9a)
The can body is coated with
（実施例） 次に本発明を実施例に基づきさらに詳細に説明する。(Example) Next, the present invention will be explained in more detail based on examples.
実施例
芯材として、第１表に示す組成の合金を鋳造後、通常の
方法でソーキング、面削し、芯材を製造した。一方皮材
は、第１表に示すようにＪＩＳ１０７０に相当する組成
のアルミニウムを鋳造後１通常の方法でソーキング、面
削し、これを加熱し圧延して製造した。こうして得た芯
材の一面に皮材を合せ、常法で加熱後、熱間圧延し、続
いて冷間圧延、中間焼鈍、冷間圧延を行って０．３ａｓ
板厚（皮材のクラット厚０．０３ｍｍ）の缶エンド材試
料Ｎｏ、１〜４を作製した。また、皮材をクラッドせず
、同様な方法で圧延した缶エンド材試料Ｎｏ、５〜８を
作製した。As an example core material, an alloy having the composition shown in Table 1 was cast, and then soaked and surfaced in a conventional manner to produce a core material. On the other hand, the skin material was manufactured by casting aluminum having a composition corresponding to JIS 1070 as shown in Table 1, soaking and face cutting in a conventional manner, and then heating and rolling it. The skin material was placed on one side of the core material obtained in this way, heated in a conventional manner, and then hot rolled, followed by cold rolling, intermediate annealing, and cold rolling.
Can end material samples Nos. 1 to 4 of plate thickness (crut thickness of skin material 0.03 mm) were prepared. In addition, can end material samples Nos. 5 to 8 were produced by rolling in the same manner without cladding the skin material.
このアルミニウム缶エンド材を低温焼鈍して調ｆｉＨ３
Ｂの板とした。この板についてリン酸／クロム酸混液に
より化成皮膜処理を施してからエポキシ系樹脂皮膜を約
５１Ｌｍの厚さに塗布した。This aluminum can end material is annealed at a low temperature to obtain a fiH3
This is board B. This board was subjected to a chemical conversion coating treatment using a phosphoric acid/chromic acid mixture, and then an epoxy resin coating was applied to a thickness of about 51 Lm.
〔試験方法）
上記のようにして得られた缶エンド材の各試料とスチー
ル板をそれぞれ、両者の端縁な折り曲げて保合後、かし
めて固着し、缶エンド材とスチール板を電気品に接続し
た。[Test method] Each sample of the can end material obtained as described above and the steel plate were bent at their edges and held together, then caulked and fixed, and the can end material and steel plate were attached to an electrical product. Connected.
このようにして作成した試料を４０℃の３％食塩水中に
３ケ月間浸漬し、孔食深さを測定した。The samples thus prepared were immersed in 3% saline at 40° C. for 3 months, and the pitting depth was measured.
その結果を第１表に示す、なお、比較材（Ｎｏ、９〜Ｎ
ｏ、ｌｌ）及び従来材（Ｎｏ、１２〜Ｎｏ、１４）とし
てクラッドしない材についても同様に試験を行い、その
結果を第１表に併せて示した。The results are shown in Table 1. Comparative materials (No. 9 to N
Similar tests were conducted on materials that were not clad as the conventional materials (No. 12 to 14), and the results are also shown in Table 1.
第１表
（発明の効果）
このように本発明のアルミニウム缶エンド材はスチール
板との接触下において、塩分を含有する内容物に対して
深い孔食を形成しない、さらに、本発明の第２発明の缶
エンド材の芯材は現在一般的に用いられているアルミニ
ウム合金の缶エンド材の組成に近く、強度成形性も問題
ない、さらに芯材にＳｉ、Ｃｕ、Ｍｎを含有させると芯
材とクラッド層との電位差が拡大し、樹脂皮膜の傷、欠
陥部に原因する孔食深さをクラット層の厚さ以下に抑制
てきる。Table 1 (Effects of the Invention) As described above, the aluminum can end material of the present invention does not form deep pitting corrosion against salt-containing contents when in contact with a steel plate. The core material of the can end material of the invention is close to the composition of aluminum alloy can end materials commonly used at present, and has no problems in strength and formability.Furthermore, when the core material contains Si, Cu, and Mn, the core material The potential difference between the resin film and the cladding layer increases, and the depth of pitting corrosion caused by scratches and defects in the resin film can be suppressed to less than the thickness of the cladding layer.
以上のように本発明の缶エンド材は塩分濃度の比較的高
い内容物を有する缶容器の缶エンド材として極めて有用
である。As described above, the can end material of the present invention is extremely useful as a can end material for can containers having contents with a relatively high salt concentration.
第１図は本発明の缶エンド材を用いたスリーピース缶の
要部拡大縦断面図、第２図は典型的なスリーピース缶の
縦断面図である。
纂Ｉ圀
番２図FIG. 1 is an enlarged vertical cross-sectional view of the main parts of a three-piece can using the can end material of the present invention, and FIG. 2 is a vertical cross-sectional view of a typical three-piece can. Collection I, number 2
Claims (2)
％、Ｍｎ０．５〜１．４％を含有し、残部がＡｌ及び不
可避不純物（以上重量％）であるアルミニウム合金から
なることを特徴とする缶エンド材。(1) Si0.05-0.15%, Cu0.2-0.7
%, Mn 0.5 to 1.4%, and the balance being Al and inevitable impurities (weight %).
％、Ｍｎ０．５〜１．４％を含有し、残部がＡｌ及び不
可避不純物であるアルミニウム合金の芯材に、Ａｌ純度
９９．０％以上で残部が不可避不純物（以上重量％）で
あるアルミニウムをクラッドしてなることを特徴とする
缶エンド材。(2) Si0.05-0.15%, Cu0.2-0.7
%, Mn 0.5 to 1.4%, and the balance is Al and unavoidable impurities. Aluminum with an Al purity of 99.0% or more and the remainder being unavoidable impurities (more than 1% by weight) A can end material characterized by being clad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14802087A JPS63317457A (en) | 1987-06-16 | 1987-06-16 | Can end material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14802087A JPS63317457A (en) | 1987-06-16 | 1987-06-16 | Can end material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63317457A true JPS63317457A (en) | 1988-12-26 |
Family
ID=15443309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14802087A Pending JPS63317457A (en) | 1987-06-16 | 1987-06-16 | Can end material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63317457A (en) |
-
1987
- 1987-06-16 JP JP14802087A patent/JPS63317457A/en active Pending
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