JPS63317456A - Composite material for can end - Google Patents
Composite material for can endInfo
- Publication number
- JPS63317456A JPS63317456A JP14801987A JP14801987A JPS63317456A JP S63317456 A JPS63317456 A JP S63317456A JP 14801987 A JP14801987 A JP 14801987A JP 14801987 A JP14801987 A JP 14801987A JP S63317456 A JPS63317456 A JP S63317456A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- composite material
- core material
- aluminum alloy
- present
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 21
- 239000011162 core material Substances 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 23
- 238000005253 cladding Methods 0.000 abstract description 11
- 150000003839 salts Chemical class 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 235000013305 food Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 235000014171 carbonated beverage Nutrition 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 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
- 239000011651 chromium Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000001681 protective effect Effects 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
- 229910000914 Mn 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
- 229910045601 alloy Inorganic materials 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 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
- 230000002950 deficient Effects 0.000 description 1
- 238000004090 dissolution Methods 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
- 150000002500 ions Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000002791 soaking Methods 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複合材に関し、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。飲料や食品の容器用材、特に缶エンド材として好
適なアルミニウム複合材に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an aluminum composite material for food containers, and more specifically, it has excellent pitting corrosion resistance against highly corrosive contents. The present invention relates to an aluminum composite material suitable for use as a container material for beverages and foods, particularly as a can end material.
（従来の技術）
−・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、実用上役れた耐
食性を示すために１日用品や建材等の分野に幅広く使用
されている。(Prior art) - Generally, aluminum or aluminum alloy is
It forms a highly protective oxide film on the surface and exhibits practical corrosion resistance, so it is 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か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）ｈｇ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) hg.
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、コーヒー
等には、スチール系の缶ボディに対し、缶エンド材とし
て、ＪＩＳ ５０５２に代表されるＡＲ−Ｍｇ合金又
はＪＩＳ ３００４等のＡｌ−Ｍｇ−Ｍｎ合金か使用
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、通常は袷装し
てから実用に供される。For carbonated drinks such as beer, less corrosive juices, coffee, etc., AR-Mg alloys such as JIS 5052 or Al-Mg-Mn such as JIS 3004 are used as can end materials for steel can bodies. Pure aluminum alloys are generally used for cap materials that particularly require deep drawability, and are usually put into practical use after being lined.
（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０文イオンが数百ｐｐ−と多く、腐食性の徴しい内
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、局部的な溶解か生して孔食と
なり。(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 contents contain a large number of 0-carbon ions of several hundred pp-. In the case of corrosive contents (e.g. tomato juice, sports drinks, soups, etc.), the protective oxide film on the aluminum alloy is easily destroyed, leading to localized dissolution and pitting corrosion.
容器として致命的なＩＧ故につながる可能性かあるのて
、その用途は自ら制限されていた。As a container, there was a possibility that it would lead to fatal IG, so its use was limited by itself.
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責
な材料を用いる場合には。Also, when aluminum or aluminum alloy is used for the can end, and the body is made of a material that is more electrochemically sensitive than aluminum or aluminum alloy, such as tinplate, TFS, or steel.
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 to the corrosive action of the contents themselves, galvanic action is added, which increases the rate of pitting corrosion that occurs in aluminum or aluminum alloy materials, and limits the use of aluminum or aluminum alloy materials depending on the contents. was becoming even more difficult.
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用複合材を得るこ
とにある。An object of the present invention is to obtain a composite material for can end materials that has the strength and formability required for can end materials, 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） Ｃｕ ０．２〜０．７重量％（以下重量％を−
に％と記す）、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％以上で残部不可避不純物であるア
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
ド複合材（以下第１発明という）及び
（２）Ｃｕ ０．２〜０．７％、 Ｍｎ ０．５〜１．
４％、Ｃｒ０１０５〜０．３５％を含有し、残部がＡ！
及び不可避不純物であるアルミニウム合金の芯材に、Ａ
ｌ純度９９．０％以上で残部が不可避不純物であるアル
ミニウムをクラッドしてなることを特徴とする缶エンド
用複合材（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 has the following features: (1) Cu 0.2 to 0.7% by weight (hereinafter referred to as -% by weight)
), the core material of an aluminum alloy containing 0.5 to 1.4% Mn and the balance being Al and unavoidable impurities is clad with aluminum having an Al purity of 99.0% or more and the remainder being unavoidable impurities. (2) Cu 0.2-0.7%, Mn 0.5-1.
4%, Cr0105~0.35%, and the balance is A!
And in the core material of aluminum alloy, which is an unavoidable impurity, A
The present invention provides a composite material for can ends (hereinafter referred to as the second invention) characterized in that it is clad with aluminum having a purity of 99.0% or more and the remainder being unavoidable impurities.
本発明の複合材において芯材及びクラッド層のアルミニ
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 content of the core material and cladding layer in the composite material of the present invention are as follows.
第１及び第２の両発明において芯材中のＣｕ含有１．％
は０．２〜０．７％とする。Ｃｕはアルミニウム合金な
′１シ気化学的に責とする効果があり、含有！許か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か増大するので好ましくな
い。In both the first and second inventions, Cu content in the core material 1. %
is set to 0.2 to 0.7%. Cu has a chemical effect on aluminum alloys and is contained! Forgive me 0.
If the content is less than 2%, this effect will be small, and if the content exceeds 0.7%, the susceptibility to intergranular corrosion will increase, which is not preferable.
第１及び第２の両発明において芯材中のＭｎ含右らｉは
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、さらに耐食性を向ヒさせると共に強
度を高める元素であり、炭酸飲料笠のような内圧が加わ
る内容物に対してはへ交−Ｍｇ合金、へ交−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″Ｃ以上の高温で殺菌する
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、Ｍｎ含有量が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。In both the first and second inventions, the Mn content in the core material is 0.5 to 1.4%. Mn is an element that electrochemically affects aluminum alloys, and also improves corrosion resistance and increases strength. For contents that are subject to internal pressure, such as carbonated beverage caps, Mn is an element that acts on aluminum alloys electrochemically. Mg-Mn
Alloys are used as materials for containers, and the pressure inside the container increases when canned fish etc. are sterilized at a high temperature of 100"C or higher after filling, so a certain degree of strength is required as a container member. If the Mn content is less than 0.5%, the desired effect cannot be obtained, and if the Mn content exceeds 1.4%, coarse intermetallic compounds are formed, which may actually cause defects in severe forming. Become.
第２発明において芯材中のＣ「含有量は０．０５〜０．
３５％とする。Ｃｒはアルミニウム合金の強度を高める
と共に電気化学的により責とし、さらに耐食性を向上さ
せる元素であり、含有量か０．０５％未満ではこの効果
は認められず、また０、３５％を越える含有量では効果
が飽和してしまい無駄であり、Ｍｎと同様に多量に含有
されると金属間化合物を生成して好ましくない。In the second invention, the C content in the core material is 0.05 to 0.
It shall be 35%. Cr is an element that increases the strength of aluminum alloys, makes them more electrochemically effective, and further improves corrosion resistance.This effect is not observed when the content is less than 0.05%, and when the content exceeds 0.35%. However, the effect is saturated and it is wasteful, and like Mn, if it is contained in a large amount, intermetallic compounds will be formed, which is not preferable.
これらの含有成分以外に、本発明の芯材中にＴｉ等の鋳
造組織を微細化する元素を含有させることか可能である
。In addition to these components, it is possible to include elements such as Ti that refine the casting structure in the core material of the present invention.
なお、Ｆｅは不可避不純物として含有されることかあり
、含有量は０．３％程度までは本発明の缶エンド用複合
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 the content is permissible up to about 0.3% as it does not impede the intended purpose of the composite material for can ends of the present invention, but it is small. It is a highly desirable element.
次に第１及び第２の両発明においてクラッド層は純度９
９．０％以上のアルミニウムとする。Next, in both the first and second inventions, the cladding layer has a purity of 9
The aluminum content should be 9.0% or more.
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ＩＦ及び低下させるためで
ある。すなゎあり９．０％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
材か１１！素イオンを含む缶内容物と接して発生する孔
食な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。The reason for cladding with 99.0% or more aluminum as a skin material is that 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, can be measured electrically. This is to chemically prevent IF and lower it. Aluminum with a concentration of 9.0% or more acts as a sacrificial anode compared to the core material, so the aluminum material in the defective part of the paint film is 11! It has the effect of making pitting corrosion less likely to occur when it comes into contact with can contents containing elemental ions, and at the same time slowing down the growth rate of pitting corrosion even if it occurs.
本発明の複合材の製造は、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このクラッド層の表面に樹
脂な熱圧着等て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
のが好ましいが、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 composite material of the present invention can be manufactured according to conventional methods. Generally, it is preferable to form a can end by laminating the surface of the cladding layer obtained in this manner by thermocompression bonding with a resin or by applying a paint such as epoxy resin or vinyl resin. It may be used as is without coating, but when coating with a resin film, it is preferable to apply a chemical conversion film such as chromium in advance.
本発明において、芯材に対する皮材のクラツド率は特に
制限はないか１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４〜２
０４ｍの範囲であるがこれに限定されるものではない。In the present invention, there is no particular restriction on the cladding ratio of the skin material to the core material.1 Usually 2 to 20%, preferably 5 to 15%.
is within the range of The thickness of the resin film is preferably 4 to 2
04 m, but is not limited to this range.
また本発明において、クラッド層は芯材の片面もしくは
両面に設けられる。Further, in the present invention, the cladding layer is provided on one or both sides of the core material.
本発明のアルミニウム複合材は、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。The aluminum composite material of the present invention can be used as a can end without any restriction on the type of can body material.
特に缶ボディ材か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、缶容器とした場合をｉ１図の
要部拡大図に示す、同図中（７）は本発明の複合材から
なる缶エンド、（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
ティングした化ボディである。Particularly suitable for use with can body materials or steel plates. In this way, the main part of the can container is shown in the enlarged view of Figure i1, in which (7) is the can end made of the composite material of the present invention, (7a) is the core material, and (7b) is the cladding. Layer (7c) is a resin film. In addition, (8) is the opening score (scorched line) formed on the can end, and (9) is a tin-free steel plate (9a) coated with resin (9c).
（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、面出し、芯材を製造した。−力皮材
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、通常の方法でソーキング、面
出し、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０．３１膳
板厚（皮材のクラッド厚０．０３ｍ５）のアルミニウム
複合材を製造した。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. - The force skin material was manufactured by casting aluminum having a composition corresponding to JIS 1070 as shown in Table 1, soaking it in the usual manner, leveling it, heating it, 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 to a thickness of 0.31 mm (the cladding of the skin material An aluminum composite material with a thickness of 0.03 m5 was manufactured.
このアルミニウム複合材を低温焼鈍して調質Ｈ３Ｂ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５ｇｍ
の厚さに塗布した。This aluminum composite material was annealed at a low temperature to obtain a tempered H3B plate. This board was treated with a chemical conversion coating using a phosphoric acid/chromic acid mixture, and then coated with an epoxy resin coating of about 5g.
It was applied to a thickness of .
（試験方法）
上記のようにして得られたアルミニウム複合材の各試料
とスチール板をそれぞれ、両者の端縁な折り曲げて係合
後、かしめて固着し、アルミニウム複合材とスチール板
を電気的に接続した。(Test method) Each sample of the aluminum composite material obtained as above and the steel plate are bent at their edges and engaged, and then caulked and fixed, and the aluminum composite material and the steel plate are electrically connected. Connected.
このようにして作成した試料を４０”（の３％食塩水中
に３ケ月間浸情し、孔食深さを測定した。The thus prepared sample was immersed in a 3% saline solution of 40" for 3 months, and the pitting depth was measured.
その結果を第１表に示す。なお、比較材及び従来材とし
てそれぞれ皮材を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. Additionally, similar tests were conducted on comparative materials and conventional materials in which the skin material was not clad, 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複合材はスチール板と
の接触下において、塩分を含有する内容物に対して深い
孔食な形成しない、さらに、本発明のアルミニウム複合
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、
さらに本発明のアルミニウム複合材において芯材にＣｕ
。Table 1 (Effects of the Invention) As described above, the aluminum composite material of the present invention does not cause deep pitting corrosion to salt-containing contents when in contact with a steel plate. The core material is close to the composition of aluminum alloy can end materials commonly used today, and there are no problems with strength and formability.
Furthermore, in the aluminum composite material of the present invention, Cu is used as the core material.
.
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
ド層の厚さ以下に抑制できる。When Mn is included, the potential difference between the core material 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アルミニウム複合材は塩分濃度の
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 aluminum composite 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用複合板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。
幕ｌ閏
暴２図FIG. 1 is an enlarged vertical cross-sectional view of the main parts of a three-piece can using the composite plate for can ends of the present invention, and FIG. 2 is a vertical cross-sectional view of a typical three-piece can. Maku I Ranbang 2
Claims (2)
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％以上で残部不可避
不純物である（以上重量％）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用複合材。(1) In the core material of an aluminum alloy containing 0.2 to 0.7% Cu, 0.5 to 1.4% Mn, and the balance being Al and unavoidable impurities, the Al purity is 99.0% or more and the remainder is unavoidable impurities. A composite material for can ends, characterized in that it is made of clad aluminum (at least % by weight).
Ｃｒ０．０５〜０．３５％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である（以上重量
％）アルミニウムをクラッドしてなることを特徴とする
缶エンド用複合材。(2) Cu0.2-0.7%, Mn0.5-1.4%,
A core material of an aluminum alloy containing 0.05 to 0.35% Cr and the balance being Al and unavoidable impurities is clad with aluminum having an Al purity of 99.0% or more and the remainder being unavoidable impurities (or more by weight). Composite material for can ends that is characterized by the ability to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14801987A JPS63317456A (en) | 1987-06-16 | 1987-06-16 | Composite material for can end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14801987A JPS63317456A (en) | 1987-06-16 | 1987-06-16 | Composite material for can end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63317456A true JPS63317456A (en) | 1988-12-26 |
Family
ID=15443286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14801987A Pending JPS63317456A (en) | 1987-06-16 | 1987-06-16 | Composite material for can end |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63317456A (en) |
-
1987
- 1987-06-16 JP JP14801987A patent/JPS63317456A/en active Pending
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