JP2673373B2 - Metal container - Google Patents
Metal containerInfo
- Publication number
- JP2673373B2 JP2673373B2 JP16490989A JP16490989A JP2673373B2 JP 2673373 B2 JP2673373 B2 JP 2673373B2 JP 16490989 A JP16490989 A JP 16490989A JP 16490989 A JP16490989 A JP 16490989A JP 2673373 B2 JP2673373 B2 JP 2673373B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- metal container
- flavor
- retort
- resistance
- 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
Landscapes
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、耐レトルト性、内容物の香味保持性（以
下フレーバー性と称す）に優れた塗料を容器内面に被覆
した金属製容器に関する。TECHNICAL FIELD The present invention relates to a metal container in which the inner surface of the container is coated with a coating material having excellent retort resistance and flavor retention (hereinafter referred to as flavor) of the content.
従来の技術 従来の金属製容器は、素材としてブリキ、ティンフリ
ースチール、アルミニウム等が用いられ、通常これらの
金属の腐食や内容物中への金属溶出を防止するために、
金属製容器の内面には保護塗膜として塗料が被覆されて
いる。そして、容器内面の被覆塗料としては、エポキシ
フェノール系塗料、エポキシアミノ系塗料、エポキシア
ミド系塗料等が用いられている。これらの保護塗料は加
工性、耐食性が良好で、ピンホール等の塗膜欠陥が少な
いという点で優れており、中でもエポキシフェノール系
塗料を金属缶の保護塗膜として用いることは従来から広
く知られている。2. Description of the Related Art Conventional metal containers are made of tin, tin-free steel, aluminum, etc. as materials, and usually prevent corrosion of these metals and elution of metal into the contents.
The inner surface of the metal container is coated with a paint as a protective coating film. Epoxyphenol-based paints, epoxyamino-based paints, epoxyamide-based paints, etc. are used as coating paints on the inner surface of the container. These protective coatings have excellent workability and corrosion resistance, and are excellent in that they have few coating film defects such as pinholes. Above all, it has been widely known that epoxyphenol coatings are used as protective coatings for metal cans. ing.
発明が解決しようとする課題 しかしながら、上記塗料が保護塗膜として用いられる
場合、高温殺菌工程を必要とする内容物の場合に要求さ
れる、耐レトルト性及びフレーバー性が十分とは言えな
かった。すなわち、最近金属製容器に充填される内容物
の種類が急増するに連れて、充填後に内容物を収納した
金属製容器をレトルト処理する機会が多くなっている。
このような金属製容器に要求される内面塗膜の物性とし
て、塗膜自体がレトルト処理に耐えるものでなければな
らず、又レトルト処理の際に、塗膜から抽出する物質に
よって、容器内の内容物が影響を受けてはならず、フレ
ーバー性が優れていることが条件とされる。However, when the above coating material is used as a protective coating film, the retort resistance and the flavor resistance required for the contents requiring a high temperature sterilization step cannot be said to be sufficient. That is, with the rapid increase in the types of contents to be filled in metal containers, there are more and more opportunities to retort a metal container containing the contents after filling.
As the physical properties of the inner coating film required for such a metal container, the coating film itself must withstand the retort treatment, and the substance extracted from the coating film during the retort treatment causes The contents must not be affected and must be excellent in flavor.
この発明は、このような課題に着目してなされたもの
で、塗膜の強靭性、耐抽出性に優れ、ピンホール等の欠
陥が少なく、さらには耐レトルト性、フレーバー性に優
れた塗料を容器内面に被覆した金属製容器を提供するこ
とを目的とする。The present invention has been made in view of such problems, toughness of the coating film, excellent in extraction resistance, less defects such as pinholes, further retort resistance, a coating excellent in flavor It is an object to provide a metal container whose inner surface is coated.
課題を解決するための手段 この課題を解決するため、この発明は塗料中に低分子
量エポキシの含有量が少なく、かつ塗料製造工程におい
て触媒が介在しないで生成されたエポキシフェノール
を、容器内面に被覆したことを特徴とする金属製容器で
ある。Means for Solving the Problems In order to solve this problem, the present invention coats the interior surface of a container with an epoxyphenol produced in a paint with a low content of low molecular weight epoxy and without a catalyst in the paint manufacturing process. It is a metal container characterized by having done.
作用及び実施例 この発明に係る金属製容器内面に被覆されるエポキシ
フェノールと、従来から用いられているエポキシフェノ
ールとを比較すると、この発明に用いられるエポキシフ
ェノールは、塗料中に低分子量エポキシの含有量が少な
く、かつ製造工程において触媒を使用しない点に特徴を
有する。すなわち発明者らは、低分子量エポキシの含有
量が多い従来のエポキシフェノールを、金属製容器内面
の保護塗膜に使用した場合に、この低分子量エポキシが
内容物中に抽出することにより、内容物の風味を低下さ
せることを研究結果から知り、特に金属製容器をレトル
ト処理した後は、フレーバー性が大きく低下することに
注目した。又、従来エポキシフェノールの製造工程にお
いて、触媒を介在させて生成したエポキシフェノール
を、容器内面に被覆した金属製容器は、同様にフレーバ
ー性が低下している事実に注目した。これは、保護塗膜
中に残留する触媒が内容物中に抽出することにより、フ
レーバー性を低下させているものと考えられる。さら
に、低分子量エポキシの含有量を低下させることによ
り、全体として塗膜中の高分子量エポキシの含有量を多
くし、塗膜の耐抽出性（KMnO4消費量の削減）、強靭
性、さらには耐レトルト性が向上することを見出した。
そこで発明者らは、これらの耐レトルト性及びフレーバ
ー性を低下させる要因を除外したエポキシフェノールを
金属製容器の保護塗膜として被覆することを思いついた
のである。Actions and Examples When comparing the epoxy phenol coated on the inner surface of the metal container according to the present invention with the conventionally used epoxy phenol, the epoxy phenol used in the present invention contains a low molecular weight epoxy in the paint. It is characterized in that the amount is small and no catalyst is used in the manufacturing process. That is, the inventors have found that when a conventional epoxyphenol having a high content of low molecular weight epoxy is used for a protective coating on the inner surface of a metal container, the low molecular weight epoxy is extracted into the content to obtain From the results of the study, we found that the flavor of syrup was reduced, and in particular, we noticed that the flavor was significantly reduced after retorting a metal container. In addition, attention has been paid to the fact that the flavor property of the metal container in which the inner surface of the container is coated with the epoxyphenol produced by interposing a catalyst in the conventional epoxyphenol production process is similarly deteriorated. It is considered that this is because the catalyst remaining in the protective coating film is extracted into the contents to reduce the flavor property. Furthermore, by decreasing the content of low molecular weight epoxy, the content of high molecular weight epoxy in the coating film as a whole is increased, and the extraction resistance (reduction of consumption of KM n O 4 ) of coating film, toughness, Furthermore, they have found that the retort resistance is improved.
Therefore, the inventors have come up with the idea of coating epoxy phenol as a protective coating film for a metal container, excluding these factors that reduce the retort resistance and flavor resistance.
この発明に用いられたエポキシフェノール、従来のエ
ポキシフェノール、エポキシアクリレート及び変性エポ
キシを、各々金属製容器内面に被覆して塗膜の物性を比
較した。すなわち、表面を清浄したテスト缶（アルミニ
ウム製有底円筒缶、容量:350cc、厚さ:0.15mm）内面
に、塗膜重量が60mg/dm2となるように各塗料を塗布し、
ついで焼付け（温度:200℃、時間:5分間）を施し、塗膜
（厚さ：約５μｍ）を形成した。又、このテスト缶内に
は、335mlの蒸留水を充填（充填温度95℃、窒素充填）
し、レトルト処理を122℃の高温蒸気中において、25分
間行なった。The epoxy phenol, the conventional epoxy phenol, the epoxy acrylate and the modified epoxy used in the present invention were coated on the inner surface of each metal container and the physical properties of the coating films were compared. That is, each paint was applied to the inner surface of a test can whose surface was cleaned (aluminum bottomed cylindrical can, capacity: 350 cc, thickness: 0.15 mm) so that the coating film weight was 60 mg / dm 2 .
Then, baking (temperature: 200 ° C., time: 5 minutes) was applied to form a coating film (thickness: about 5 μm). Also, fill the test can with 335 ml of distilled water (filling temperature 95 ° C, nitrogen filling).
Then, the retort treatment was performed in high temperature steam at 122 ° C. for 25 minutes.
上記レトルト処理された塗膜の物性を、下記の方法に
従って求めた。その結果を第１表に示す。The physical properties of the retort-treated coating film were determined according to the following methods. Table 1 shows the results.
（通電値） 容器内に５％の塩化ナトリウム水溶液を入れ、直流6.
3Vで通電し、４秒後の電流値を読み取った。(Electrical value) 5% sodium chloride solution was put in the container, and direct current 6.
After energizing at 3V, the current value was read after 4 seconds.
（ラビングテスト） ２ポンドハンマーの先端にガーゼ16枚を重ね合わせ、
これにメチルエチルケトンを十分にしみこませた後、塗
膜を約15cm幅でこすり、塗膜が剥離するまでの回数を数
えた。(Rubbing test) Put 16 pieces of gauze on the tip of 2 pound hammer,
After sufficiently impregnating this with methyl ethyl ketone, the coating film was rubbed with a width of about 15 cm, and the number of times until the coating film peeled off was counted.
（KMnO4消費量） 厚生省告示370号、食品添加物等の規格基準第３器具
及び容器包装のＢ−１過マンガン酸カリウム消費量試験
法に準じた。また溶出比率は0.75cm2/1ccとした。(KM n O 4 consumption) MHW Notification 370 No., pursuant to food additives such as standard reference third instrument and packaging of B-1 potassium permanganate consumption test method. The elution ratio was 0.75 cm 2/1 cc.
（塗膜白化の有無） 温度:122℃、時間:25分において、レトルト処理後の
塗膜表面状態を目視した。(Presence or absence of whitening of coating film) At a temperature of 122 ° C and a time of 25 minutes, the surface state of the coating film after the retort treatment was visually observed.
有：塗膜が白くにごっている。Existence: The coating film is white and cloudy.
無：塗膜に変化なし （フレーバーテスト） 10人のパネラーによって、缶内に充填された水を賞味
した。５点法により、10人の平均値を取った。None: No change in coating film (flavor test) The water filled in the can was tasted by 10 panelists. The average value of 10 persons was calculated by the 5-point method.
１、気にならない ２、ほとんど気にならない ３、やや気になる ４、気になる ５、非常に気になる 上記、第１表に示すように、この発明に係る金属製容
器に被覆されたエポキシフェノールの物性を分析する
と、KMnO4消費量が従来のエポキシフェノールより少な
く、塗膜の耐抽出性が良好であることが判明した。又、
レトルト処理後における塗膜白化現象も認められず、又
フレーバーテストにおいても、他の被覆塗料より優れて
いるという結果が得られた。1, not worried 2, hardly worried 3, slightly worried 4, worried 5, very worried As shown in Table 1 above, when the physical properties of the epoxy phenol coated on the metal container according to the present invention are analyzed, the consumption of KM n O 4 is smaller than that of conventional epoxy phenol and the extraction resistance of the coating film is low. It turned out to be good. or,
No whitening phenomenon of the coating film was observed after the retort treatment, and it was also obtained in the flavor test that it was superior to other coating paints.
効果 以上説明してきたように、この発明に係る金属製容器
は、耐レトルト性及びフレーバー性に優れており、特に
レトルト殺菌後におけるフレーバー性が良好である。従
って、高温殺菌工程を必要とする内容物を収納する金属
製容器に適することは明らかである。Effects As described above, the metal container according to the present invention is excellent in retort resistance and flavor resistance, and particularly good in flavor after retort sterilization. Therefore, it is obvious that it is suitable for a metal container for storing contents requiring a high temperature sterilization process.
Claims (1)
く、かつ塗料製造工程において触媒が介在しないで生成
されたエポキシフェノールを、容器内面に被覆したこと
を特徴とする金属製容器1. A metal container characterized in that a paint has a low content of low molecular weight epoxy, and the inside of the container is coated with epoxyphenol produced without a catalyst in the paint manufacturing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16490989A JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16490989A JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0329747A JPH0329747A (en) | 1991-02-07 |
| JP2673373B2 true JP2673373B2 (en) | 1997-11-05 |
Family
ID=15802168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16490989A Expired - Fee Related JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2673373B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5203700B2 (en) | 2004-05-07 | 2013-06-05 | マグネモーション インコーポレイテッド | Transportation means and transportation method |
| US9032880B2 (en) | 2009-01-23 | 2015-05-19 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors and switching mechanism |
| US8616134B2 (en) | 2009-01-23 | 2013-12-31 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors |
| KR102331404B1 (en) | 2013-09-21 | 2021-11-25 | 마그네모션, 인코포레이티드 | Linear motor transport for packaging and other uses |
| JP6838861B2 (en) * | 2016-03-09 | 2021-03-03 | 大和製罐株式会社 | A method for forming a water-repellent paint, a metal plate and a metal container coated with the water-repellent paint, and a water-repellent coating film. |
| JP6313828B2 (en) * | 2016-09-09 | 2018-04-18 | 株式会社すなおネット | Food container, food container providing method, food product and food product providing method |
| JP2018039575A (en) * | 2017-09-20 | 2018-03-15 | 株式会社すなおネット | Method for providing food container |
| JP6313893B1 (en) * | 2017-09-29 | 2018-04-18 | 株式会社すなおネット | Food product and manufacturing method thereof, and accessory and manufacturing method thereof |
-
1989
- 1989-06-27 JP JP16490989A patent/JP2673373B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329747A (en) | 1991-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |