JPH03177580A - Aluminum and aluminum alloy for deep drawing food vessel - Google Patents
Aluminum and aluminum alloy for deep drawing food vesselInfo
- Publication number
- JPH03177580A JPH03177580A JP31506089A JP31506089A JPH03177580A JP H03177580 A JPH03177580 A JP H03177580A JP 31506089 A JP31506089 A JP 31506089A JP 31506089 A JP31506089 A JP 31506089A JP H03177580 A JPH03177580 A JP H03177580A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- aluminum alloy
- amount
- phosphoric acid
- adhesion
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 235000013305 food Nutrition 0.000 title claims abstract description 25
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 14
- 239000011651 chromium Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical compound OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 17
- 238000005260 corrosion Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 10
- 150000003839 salts Chemical class 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000008602 contraction Effects 0.000 abstract 1
- 235000021264 seasoned food Nutrition 0.000 abstract 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000001954 sterilising effect Effects 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- 244000294411 Mirabilis expansa Species 0.000 description 1
- 235000015429 Mirabilis expansa Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000020992 canned meat Nutrition 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000021185 dessert Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 235000019688 fish Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 235000013536 miso Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000012045 salad Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000013555 soy sauce Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
（産業上の利用分野）
本発明は、深絞り食品容器用アルミニウム及びアルミニ
ウム合金材に係り、更に詳しくは、樹脂塗装後に深絞り
加工を行っても樹脂との間に優れた密着性を維持し、飲
料水や食品内容物を充填した状態で加熱殺菌処理を受け
た場合でも樹脂の剥離が生じなく、内容物が充填された
状態で長時間置かれても樹脂との密着性が良好でアルミ
ニウム及びアルミニウム合金食品容器を腐食から保護し
得る深絞り食品容器用アルミニウム及びアルミニウム合
金材に関する。
（従来の技術）
アルミニウムは美感、成形加工性、耐食性等に優れた特
長を有しているため、飲料容器やキャップ、更には建築
材料等に多用されている。
近年、従来ブリキが使用されていた魚肉類やサラダなど
のデザート食品の容器部材としてもアルミニウムが実用
化され始めている。そしてこれら食品のアルミニウム容
器缶胴は、アルミニウムのもつ優れた成形加工性を利用
して、樹脂塗装を行った後、絞り加工する方法によって
成形されている。
その場合、絞り加工においてもアルミニウムと樹脂塗装
との間の密着性を優れたものにするために、アルミニウ
ム表面に密着性向上効果の大きい下地皮膜を予め施して
おく必要があるが、絞り加工による素材の変形は軸方向
へは伸び、円周方向へは縮みを受ける過酷なものである
から、下地皮膜には加工性、特に絞り加工性に優れ、加
工後においても密着性に優れた特性が必要となる。
また、食肉缶詰内容物は、飲料水と比較して塩分の高い
ものが多く、特に食塩、醤油、みそなどで味付けした食
品はＣＱイオンを数千〜数百ｐｐｍ含むものがあり、ア
ルミニウムに対して腐食性の激しいものが多く、更にこ
れら食品内容物は容器に充填された後、加熱殺菌処理が
施される。
したがって、この場合には、樹脂塗装後深絞り加工が行
われる食品容器用アルミニウム及びアルミニウム合金材
の下地皮膜には、加工後密着性に加えて、加熱殺菌処理
後の密着性と、アルミニウム容器を腐食性の激しい内容
物から防食する特性が必要となる。
（発明が解決しようとする課題）
従来より、これら樹脂塗装後に深絞り加工される食品容
器用アルミニウム及びアルミニウム合金材には、下地皮
膜処理として燐酸クロメート処理が行われているが、燐
酸クロメート処理には以下に説明するような問題があっ
た。
すなわち、燐酸クロメート処理は、アルミニウム及びア
ルミニウム合金表面に処理することによってアルミニウ
ムの耐食性を著しく向上させ、アルミニウムと樹脂との
密着性を向上させるが、皮膜量が多い場合、絞り率が大
きい深絞り加工を行ったときには、その密着性の低下に
より、加熱殺菌処理を行うと樹脂の剥離が生じ、また耐
食性が低下することがある。そして、この問題は絞り率
が大きくなるほど顕著になる。
本発明は、上記従来技術における問題点を解決するため
になされたものであって、樹脂塗装に対する密着性が良
好で、深絞り加工を行った後に加熱殺菌処理を行っても
良好な密着性及び耐食性を示す皮膜を有するアルミニウ
ム及びアルミニウム合金材を提供することを目的とする
ものである。
（課題を解決するための手段）
上記目的を達成するため、本発明者は、絞り加工後の塗
膜密着性及び耐食性に及ぼす燐酸クロメート処理皮膜の
加工性に関して鋭意研究を重ねた結果、クロム付着量を
規制することにより、可能であることを見い出し、ここ
に本発明をなしたものである。
すなわち、本発明に係る深絞り食品容器用アルミニウム
及びアルミニウム合金材は、アルミニウム又はアルミニ
ウム合金の表面に、成形加工用樹脂塗装の下地皮膜とし
て、クロム付着量が７〜２５ｍｇ／ｍ”である燐酸クロ
メート処理皮膜が設けられていることを特徴とするもの
である。
以下に本発明を更に詳細に説明する。
（作用）
先ず、本発明に係る深絞り食品容器用アルミニウム及び
アルミニウム合金材においてクロム付着量を７〜２５ｍ
ｇ／ｍ”とする理由について説明する。
燐酸クロメート処理は、アルミニウム及びアルミニウム
合金表面に処理することによってアルミニウムの耐食性
を向上させるが、クロム付着量が７ｍｇ／１未満では耐
食性向上効果が小さく、ＣＱイオンを数千〜数百ｐｐｍ
含む食品容器用としては不十分である。したがって、少
なくとも７ｍｇ／ｍ”以上のクロム付着量が必要である
。
しかし、本発明者が、塗装後に絞り加工して作製した絞
りカップの側壁部の耐食性と、回部の燐酸クロメート処
理皮膜の表面形態との関係を調査して得た知見によれば
、クロム付着量が２５ｍｇ／ｌ１１２を超えると、絞り
加工による皮膜の破壊が大きくなり、そのため皮膜欠陥
部が増加する結果、樹脂との密着性及び耐食性が低下す
ることが判った。
一方、クロム付着量が２５ｍｇ／ｎ＋２以下では、皮膜
の破壊が小さくなることを見い出した。
このような理由から、クロム付着量は７〜２５ｍｇ／ｍ
’とするものである。
かくして得られたアルミニウム及びアルミニウム合金材
は、食品容器とするために絞り成形に供される。
その場合、絞り率が２０％未満の容器の場合は、本発明
の優位性は小さいが、絞り率が２０％以上の容器の場合
には、密着性及び耐食性の点で、従来技術と比較して特
に優れた特性を発揮でき、本発明の効果が顕著である。
なお、アルミニウム及びアルミニウム合金としては、こ
の種の食品容器に用いられる種々の材質のものでよく、
特に制限はされない。
次に本発明の実施例を示す。
（実施例）
脱脂、水洗したアルミニウム材料（材質：３００４．０
．３６ｍｍ厚）を、３０℃の燐酸クロメート処理浴に浸
漬し、水洗、乾燥することにより、第１表に示すクロム
付着量を有する燐酸クロメート処理アルミニウム材料を
作製した。なお、クロム付着量は浸漬時間により調整し
た。
得られたアルミニウム材料について、エポキシフェノー
ル系塗料を、焼付は後の厚さが４μｍ、８μｍ、工２μ
ｍになるように塗布し、２００℃で１０分間焼付けた。
この塗装板について、食塩及びクエン酸の濃度をそれぞ
れ０．５％に調整した５０℃の水溶液に８日浸漬した後
、腐食ピットの発生数により耐食性を評価した。
また、塗膜厚さ８μｍの塗装板について、その塗装面が
内面になるように絞り率１５％、３０％。
６０％の絞り加工をそれぞれ行った後、５％食塩。
０．５％クエン酸を含むｐＨ＝３．０の溶液を充填した
圧力容器内で１２５℃×３０分の加熱処理を施し、樹脂
塗装のブリスター発生状況により、樹脂密着性を評価し
た。なお、絞り率は次式にて算出した。
絞り率＝（（ブランク径−ポンチ径）／（ブランク径）
）Ｘ１００（％）
そして、上記加熱処理を行った後、溶液を充填したまま
、３８℃で１ケ月貯蔵した後、塗膜のブリスター発生状
況により、耐食性を評価した。
以上の結果を第１表に併記する。なお、比較例１は脱脂
のみのアルミニウム材の場合である。比較例２〜４はそ
れぞれクロム付着量が３ｍｇ／ｎ＋”、３０ｍｇ／ｍ”
、５０ｍｇ／ｍ”の場合であり、本発明範囲よりも少な
い場合と多い場合の例である。
第１表から明らかなように、本発明例は何れも、深絞り
加工前の状態で高塩素イオンを含む溶液に浸漬しても、
また深絞り加工後に高塩素イオンを含む溶液を充填した
状態で加熱処理を行っても、樹脂塗料との密着性におい
て優れ、また耐食性においても非常に良好な特性を示し
ている。
一方、比較例１〜２は樹脂密着性、耐食性ともに劣って
いる。また比較例３〜４の場合には、絞り率が大きくな
ると耐食性が低下している。(Industrial Application Field) The present invention relates to aluminum and aluminum alloy materials for deep-drawn food containers, and more specifically, the present invention relates to aluminum and aluminum alloy materials for deep-drawn food containers, and more specifically, they maintain excellent adhesion with resin even when deep-drawn after resin coating. , the resin does not peel off even when heated and sterilized filled with drinking water or food contents, and the adhesion with the resin is good even if the contents are left for a long time. and aluminum and aluminum alloy materials for deep-drawn food containers that can protect aluminum alloy food containers from corrosion. (Prior Art) Aluminum has excellent features such as aesthetic appearance, moldability, and corrosion resistance, so it is widely used in beverage containers, caps, and even building materials. In recent years, aluminum has begun to be put into practical use as containers for fish and meat, salads, and other dessert foods, for which tin was traditionally used. These aluminum container bodies for food products are formed by drawing after applying a resin coating, taking advantage of the excellent moldability of aluminum. In that case, in order to ensure excellent adhesion between the aluminum and resin coating during drawing, it is necessary to apply a base film on the aluminum surface in advance, which has a large adhesion-improving effect. Since the deformation of the material is severe as it stretches in the axial direction and contracts in the circumferential direction, the base film has excellent workability, especially drawing workability, and excellent adhesion even after processing. It becomes necessary. In addition, the contents of canned meat often have a high salt content compared to drinking water, and foods flavored with salt, soy sauce, miso, etc. may contain thousands to hundreds of ppm of CQ ions, and aluminum Many of these foods are highly corrosive, and after being filled into containers, the contents of these foods are subjected to heat sterilization treatment. Therefore, in this case, the base film of aluminum and aluminum alloy materials for food containers that are deep-drawn after resin coating should not only have adhesion after processing, but also adhesion after heat sterilization and It is necessary to have properties that protect against highly corrosive contents. (Problems to be Solved by the Invention) Conventionally, phosphoric acid chromate treatment has been performed as a base film treatment on aluminum and aluminum alloy materials for food containers that are deep-drawn after resin coating. had the following problems. In other words, phosphoric acid chromate treatment significantly improves the corrosion resistance of aluminum and improves the adhesion between aluminum and resin by treating the surface of aluminum and aluminum alloys, but when the amount of coating is large, deep drawing with a large drawing ratio is required. When heat sterilization is performed, the resin may peel off due to the reduced adhesion, and the corrosion resistance may also be reduced. This problem becomes more noticeable as the aperture ratio increases. The present invention has been made to solve the problems in the prior art described above, and has good adhesion to resin coatings, and even when heat sterilization is performed after deep drawing. The object of the present invention is to provide aluminum and aluminum alloy materials having a film exhibiting corrosion resistance. (Means for Solving the Problems) In order to achieve the above object, the present inventor has conducted extensive research on the workability of phosphoric acid chromate treatment films on the adhesion and corrosion resistance of paint films after drawing processing, and found that chromium adhesion We have discovered that this is possible by regulating the amount, and have hereby made the present invention. That is, in the aluminum and aluminum alloy materials for deep-drawn food containers according to the present invention, phosphoric acid chromate with a chromium adhesion amount of 7 to 25 mg/m'' is applied to the surface of aluminum or aluminum alloy as a base film for resin coating for molding. The present invention is characterized by being provided with a treated film. The present invention will be explained in more detail below. (Function) First, the amount of chromium deposited in the aluminum and aluminum alloy materials for deep-drawn food containers according to the present invention will be explained in more detail. 7~25m
The reason for setting "g/m" will be explained. Phosphoric acid chromate treatment improves the corrosion resistance of aluminum by treating the surface of aluminum and aluminum alloys, but if the amount of chromium deposited is less than 7 mg/m, the effect of improving corrosion resistance is small, and the CQ Thousands to hundreds of ppm of ions
It is insufficient for food containers containing Therefore, the amount of chromium deposited is at least 7 mg/m'' or more. According to the knowledge obtained by investigating the relationship with morphology, when the amount of chromium deposit exceeds 25 mg/l112, the destruction of the film due to drawing becomes large, resulting in an increase in the number of film defects, and as a result, the adhesion with the resin decreases. It was found that the amount of chromium deposited was 25 mg/n+2 or less, and the destruction of the film was reduced.For these reasons, the amount of chromium deposited was 7 to 25 mg/m2.
'. The aluminum and aluminum alloy materials thus obtained are subjected to drawing to form food containers. In that case, in the case of containers with a reduction ratio of less than 20%, the present invention has a small advantage, but in the case of containers with a reduction ratio of 20% or more, it is superior to the conventional technology in terms of adhesion and corrosion resistance. In this case, particularly excellent properties can be exhibited, and the effects of the present invention are remarkable. Note that aluminum and aluminum alloys may be made of various materials used for this type of food container.
There are no particular restrictions. Next, examples of the present invention will be shown. (Example) Degreased and water washed aluminum material (material: 3004.0
．． 36 mm thick) was immersed in a phosphoric acid chromate treatment bath at 30°C, washed with water, and dried to produce phosphoric acid chromate treated aluminum materials having the amount of chromium deposited as shown in Table 1. Note that the amount of chromium deposited was adjusted by the immersion time. The resulting aluminum material was coated with epoxy phenol paint, with a thickness of 4 μm, 8 μm, and 2 μm after baking.
The film was coated in an amount of m and baked at 200° C. for 10 minutes. This coated plate was immersed for 8 days in an aqueous solution of common salt and citric acid at 50° C. each having a concentration of 0.5%, and then its corrosion resistance was evaluated based on the number of corrosion pits. Also, for a painted board with a coating thickness of 8 μm, the aperture ratio was 15% and 30% so that the painted surface became the inner surface. After each 60% drawing process, add 5% salt. Heat treatment was performed at 125° C. for 30 minutes in a pressure vessel filled with a solution containing 0.5% citric acid and had a pH of 3.0, and resin adhesion was evaluated based on the occurrence of blisters in the resin coating. Note that the aperture rate was calculated using the following formula. Reduction rate = ((blank diameter - punch diameter) / (blank diameter)
)X100 (%) After performing the above heat treatment, the solution was stored at 38° C. for one month, and the corrosion resistance was evaluated based on the occurrence of blisters in the coating film. The above results are also listed in Table 1. Note that Comparative Example 1 is a case of an aluminum material that is only degreased. Comparative Examples 2 to 4 have a chromium deposition amount of 3 mg/n+" and 30 mg/m", respectively.
, 50mg/m'', and these are examples of cases where the amount is less than the range of the present invention and cases where it is more than the present invention. Even when immersed in a solution containing ions,
Furthermore, even when heated after being filled with a solution containing high chlorine ions after deep drawing, it has excellent adhesion to resin paints and exhibits very good corrosion resistance. On the other hand, Comparative Examples 1 and 2 are inferior in both resin adhesion and corrosion resistance. Moreover, in the case of Comparative Examples 3 and 4, as the drawing ratio increases, the corrosion resistance decreases.
（発明の効果）
以上詳述したように、本発明によれば、樹脂塗装に対す
る密着性が良好で、深絞り加工を行った後、内容物を充
填した状態で加熱殺菌処理を行っても良好な密着性及び
耐食性を示す燐酸クロメート処理を施したアルミニウム
及びアルミニウム合金材を得ることができるので、樹脂
塗装を行った後に深絞り加工し、更に味付は食品等塩分
の高い食品を充填して加熱殺菌するような食品容器材と
して最適の素材を提供することができる。特に絞り率の
大きい成形加工用に顕著な効果を有する。(Effects of the Invention) As detailed above, according to the present invention, the adhesion to the resin coating is good, and after deep drawing, the heat sterilization treatment with the contents filled is also good. It is possible to obtain aluminum and aluminum alloy materials that have been treated with phosphoric acid chromate and exhibit excellent adhesion and corrosion resistance, so they can be deep-drawn after being coated with resin, and further seasoned by filling them with high-salt foods such as food. It is possible to provide an optimal material for food containers that can be heat sterilized. It has a remarkable effect especially in molding processes with a large drawing rate.
Claims (2)
形加工用樹脂塗装の下地皮膜として、クロム付着量が７
〜２５ｍｇ／ｍ＾２である燐酸クロメート処理皮膜が設
けられていることを特徴とする深絞り食品容器用アルミ
ニウム及びアルミニウム合金材。(1) The amount of chromium deposited on the surface of aluminum or aluminum alloy as a base film for resin coating for molding is 7.
An aluminum and aluminum alloy material for deep-drawn food containers, characterized by being provided with a phosphoric acid chromate treatment film having a concentration of ~25 mg/m^2.
２０％以上で成形加工される用途に供されるものである
請求項１に記載の深絞り食品容器用アルミニウム及びア
ルミニウム合金材。(2) The aluminum and aluminum alloy materials for deep-drawn food containers according to claim 1, wherein the aluminum and aluminum alloy materials are used to be formed at a drawing ratio of 20% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31506089A JPH03177580A (en) | 1989-12-04 | 1989-12-04 | Aluminum and aluminum alloy for deep drawing food vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31506089A JPH03177580A (en) | 1989-12-04 | 1989-12-04 | Aluminum and aluminum alloy for deep drawing food vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03177580A true JPH03177580A (en) | 1991-08-01 |
Family
ID=18060953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31506089A Pending JPH03177580A (en) | 1989-12-04 | 1989-12-04 | Aluminum and aluminum alloy for deep drawing food vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03177580A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06346178A (en) * | 1993-04-14 | 1994-12-20 | Sumitomo Light Metal Ind Ltd | Aluminum alloy material for recording medium cassette shutter and its production and aluminum alloy shutter using the same |
| JP2008126515A (en) * | 2006-11-21 | 2008-06-05 | Furukawa Sky Kk | Aluminum plate for formation of cap having excellent resin adhesion and corrosion resistance after formation |
| JP2016137626A (en) * | 2015-01-27 | 2016-08-04 | 株式会社Uacj | Resin coated aluminum material and manufacturing method therefor, aluminum resin conjugation material and manufacturing method therefor |
-
1989
- 1989-12-04 JP JP31506089A patent/JPH03177580A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06346178A (en) * | 1993-04-14 | 1994-12-20 | Sumitomo Light Metal Ind Ltd | Aluminum alloy material for recording medium cassette shutter and its production and aluminum alloy shutter using the same |
| JP2008126515A (en) * | 2006-11-21 | 2008-06-05 | Furukawa Sky Kk | Aluminum plate for formation of cap having excellent resin adhesion and corrosion resistance after formation |
| JP2016137626A (en) * | 2015-01-27 | 2016-08-04 | 株式会社Uacj | Resin coated aluminum material and manufacturing method therefor, aluminum resin conjugation material and manufacturing method therefor |
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